Do-it-yourself corner bender. How does a manual bending machine work and how to make it yourself? Structural detailing and assembly

In the mass production of products from galvanized sheet, high-performance automatic machines, roll-rolling units, edge benders, and devices for rolling drainpipe seams are used. For the manufacture of metal products and in small portions, intended, for example, for private construction or a small industrial workshop, it is economically advantageous to use a manual sheet bender.

What is a sheet bending machine?

The new equipment is designed to facilitate manual production in the manufacture of elements, galvanized aprons, gutters, and other small roofing elements. The sheet bender is a metal used for bending brass, steel, aluminum, corrugated board, and other flat sheets. A manual roller bender is able to bend the metal at the required angle, without violating the plane of the material.

For work in the courtyard of a private house, you should not purchase an expensive bending unit; it is much more profitable to make manual sheet benders with your own hands. Reviews say that a home-made device works with metal up to 2 mm thick, the length of the passing workpiece is 4 m, it can be at an angle of up to 180º. Of the structural details, one can name a crimping device with a lever, a base and a clamping mechanism.

Where are industrial bending machines used?

Machine tools are used for the manufacture of bent parts in the national economy:

flat metal structures of complex configuration are used in construction as wired elements of water and sewer communications, roofing, drainage, window openings;
in furniture production for the manufacture of boxes, boxes, cones;
in the engineering industry, sheets are bent for spare parts, car bodies, trailers;
for the production of electronic equipment;
in the construction of ships, aircraft and rockets.

Varieties of bending machines for flat metal

The bending machine is distinguished by the same principle of working torque, the difference lies in the drive with which the force is carried out:

pneumatic;
hydraulic;
mechanical;
electromechanical;

Sheets are fed into the working area in manual or automatic mode, the size setting also differs in these two parameters.

Mechanical bending machine

The operation of the equipment is carried out from the flywheel, which provides energy to turn the lever. When you press it, the part is bent at a given angle, an increase in the lever arm leads to a change in the required force.

Electromechanical sheet bending equipment

It is an improved version of the mechanical version. Power is supplied to the lever by an electric motor. These machines are most common among professionals due to their convenient use and versatile operation. All bending processes take place automatically, the operator only presses the button, after setting the parameters.

Many machines can withstand forces of hundreds of kilograms, there are powerful machines that work with a load of up to a ton. Electromechanical units are small in size, operate with a low noise level, bend a large number of parts in a short time, approximately several hundred elements per minute.

The design of the manual bending machine

The manual roller bender contains in its design many elements that ensure its operation. Tin sheet, corrugated board or metal is fixed in working position using a pressure beam. Giving the desired shape of the part is made by a special beam. The bending angle is set by the worker and differs in different models of machines.

The goniometer is made in the form of a disk with marked divisions, which allow you to set the desired curvature size. Placement and movement of material takes place on the back table with the feed limiter installed. The clamping beam is brought into working position by means of a handle. The shape of a high-quality bend is set by the tensioning device of the main and bending beams. As an option, brakes are installed on a swivel block with wheels, LGS moves on it. The manual sheet bender is fixed in the working position before starting work.

segment machine

In machines with a manual drive, metal bending occurs due to the physical strength of the worker by pressing on the rotary beam. Some models are made with a pedal. With the help of a manual machine, it is possible to process a sheet that is not too thick and at small angles. A device of this type is often found in a private courtyard for the manufacture of bent parts intended for household needs. The fact that the manual sheet bender does not contain rubbing and sliding elements makes the machine strong and durable. Craftsmen use the machine with brackets installed on the support beams and a selected corner radius to create complex parts.

Listogib segment manual

It carries out contour bending of piece products from sheet steel, this procedure becomes possible due to the use of a set of standard segments. For efficient operation, a clamping mechanism is placed in it. It has a place to install segments and a rotary bender. With the help of a manual lever, the beam is rotated by a given angle size, if the power of the machine is large, then a foot drive is provided to transfer the force.

The production of manual sheet benders provides for the fastening of all structural units on the frame according to the type of frame assembled from rolled metal. To ensure that the movement is rectilinear and does not move to the side, guide devices are attached. Mechanical or magnetic devices are used as clamps. The uniform movement of the workpiece and mechanical parts is due to the springs to compensate for vibration.

Segment bending material

The tool alloyed steel of the HVG or 9XC brand is considered the best, from which a high-quality machine is made. The manual sheet bender has a set of working segments for planting and bending the product. The seat is designed for fastening, and the working part is made taking into account the most common bending options. In manual machines, the height of the segment tool remains unchanged and is made the same for all types of equipment.

Specifications

The operating parameters for approximately all types of manual bending machines are the same and look like this:

produce bending up to one and a half meters long;
bend non-ferrous metals and alloys up to 3 mm thick, up to 4 m long;
the angle that you can count on when bending, for different models is from 140º to 180º;
manual roller bender makes it possible to accurately bend the installed semi-finished product with the already existing curved edges and edges.

Making a bending machine for sheet steels with your own hands

For processing by bending metal sheets in a private household, it is quite enough to make manual sheet benders with your own hands. Drawings before cutting rolled metal and assembling the bed should be done without fail. Sketches with marked dimensions will allow you to design the machine in such a way that the most enduring parts of the machine will serve to absorb the main load.

Purpose of homemade bending machines

The choice of scheme depends on its purpose:

In the first case, the sheets are bent at 90º. Almost all homemade machines provide for more pressure on the traverse in its lower part, while moving it forward a little.

The second option is a professional press for bending a metal sheet. This equipment works on industrial sites, requires large financial costs and the work of a qualified specialist.
In the third version, a broaching version of the machine is made, in which the radius is set by changing the position of the feed rolls. These elements are multifunctional and are used for the manufacture of casings, connecting sections of wide pipelines, shells. Manual sheet bending from corrugated board is carried out with profiled rollers for pulling roofing materials, ridges, valleys, drainage elements.

The first option is most suitable for a standard bending fixture at home.

To determine the power and type of machine, you should study its technical description:

the machine effectively works with metal with a thickness of galvanized sheet up to 0.6 mm, copper - up to 1 mm, aluminum bending with a thickness of up to 0.7 mm;
the sheet must have a width of no more than 1 m;
slope of the bent wall - not less than 120º;
the maximum number of working cycles without interruption reaches 1200;
difficult to tolerate work with non-standard parts and blanks, they require restructuring.

Necessary materials

For the device of the bed, a channel with a height of No. 12 is used. The lining pillow is made of a wooden beam of a certain size, depending on the design. For the manufacture of the right cheek, sheet metal of 6-9 mm is suitable. For the design of the pressure beam, a corner No. 60-80 is taken, reinforcement with a diameter of 10 mm is prepared for the axis of the punch. Drawings of a manual bending machine provide for a punch of the second option, a corner No. 80-100 or a channel No. 10. The lever is made of reinforcement with a diameter of 10 mm.

For the design of the punch, it is better to use not a corner, but a channel, since the load on this element is distributed in such a way that the corner will bend in the middle part, which will lead to its premature wear. The additional shelf of the channel will take over the tensile force during operation. Equipment with a channel punch can withstand about 1200 bends, and a machine with an angle used will go wrong after 250 cycles.

Assembly sequence of bending equipment

Manual sheet bender is assembled in the sequence provided in the description of the drawings. One after another, a clamp is assembled, consisting of a collar, a heel and a screw, based on a corner No. 60, then a cheek is designed. Next, a base is made with a bracket from corner No. 110, on which a pressure beam is arranged. All parts, together with the punch on the axis, are mounted on the bed.

The pressure beam from below is milled after assembly by welding the entire structural assembly. It is not recommended to use grinding with a grinder or filing with a file to give a smooth surface. The clamping beam should be additionally reinforced with rolled metal, and the length should be 5 cm shorter than the base.

At the ends of the clamp, stoppers are made from corner scraps. Clamping parts related to the workpiece material are milled. The center of the shelf on the brackets is equipped with a hole with a diameter of 8 mm. The drawings of the manual bending machine provide that the punch is made shorter than the clamp by 100 mm. The lever is made of reinforcement and welded to the punch by welding. For the manufacture of cheeks, a steel sheet is taken and holes of 1 cm are drilled in it to install the axles. On the edge, a chamfer with a depth of 0.6 cm is removed from the ends, its length is 3.2 cm. When connecting the axes by welding, it should be taken into account that the direction of them and the edges must match.

Safety

The machine belongs to the equipment with a high degree of danger, so compliance with the rules should come first. Before starting work, they study the instructions, determine the technological sequence for manufacturing the product and strictly follow it. Homemade machine or production, work should begin with the necessary actions:

put on working clothes and check for hanging and protruding parts, it should not have torn buttons, non-working zippers, cuffs are fastened;
check the condition of the working structures and their fastening on the frame, all malfunctions are eliminated before starting the machine;
for work, they provide a distance of 1 meter from the machine, the passage to the equipment must not be cluttered with foreign objects;
the workplace must have sufficient lighting, it is forbidden to work in the twilight;
for each machine there are permissible parameters for the thickness of the metal, it is impossible to bend workpieces more than the specified dimensions and standards;
it is strictly forbidden to leave the workplace and be absent from it when the machine is turned on.

Conclusion

With the mass production of bent products, a lot of waste remains in the production process, which the economic owners of private houses use to equip the site and the building itself. A do-it-yourself bending machine made will be a real help for craftsmen and their neighbors. It is not difficult to design and assemble such a machine, the main thing is that it will become a real find for home construction.

It is not difficult to make a bending machine with your own hands, but so far a few home craftsmen and specialists who use bent sheet steel products in their activities are engaged in the manufacture of such equipment for their own needs. Meanwhile, such a device, which has a sufficiently high reliability and ease of operation, will help to save a lot.

One of the most affordable sheet benders is the domestic LGS-26, the price is about 38 thousand rubles. We will make it cheaper and optimize for your needs

Especially the manufacture and use of a bending machine is relevant for those who need to perform technological operations for bending sheet material not daily and in large volumes, but periodically.

Types of sheet benders and their design

Before you start making a homemade manual sheet bender, you should clearly define the list of tasks for which it is necessary. It will depend on the main purpose of such a device according to which scheme it will be executed.

The simplest is a fixture in which sheet metal is bent using a special traverse. By means of such a device, it is possible to easily bend a sheet of metal at an angle of 90 degrees, using only the strength of the hands without additional devices, if the width of the sheet does not exceed 0.5 meters. The base of the sheet is fixed with clamps or in a vice, and its bending is carried out due to the pressure exerted by the traverse. In some cases, to obtain a bend angle of exactly 90 degrees, you may need an embedded spacer (in the figure - on the right), which is an ordinary strip of metal that will help compensate for the elasticity of the sheet.

More complex in design is a press brake, the design of which is a matrix and a punch. Sheet metal in such a device is located on the matrix, and the punch is lowered onto the workpiece from above, giving it the required profile. At home, a press brake is unlikely to find application, as it is quite complicated and unsafe to use.

Execution option of a homemade press brake, working in tandem with. If you already have a press, then it will not be difficult to supplement it with devices for bending narrow sheets of metal. You will get something like this:

A bending machine is much more perfect, in which metal bending is carried out due to the action of three shafts on it. Such equipment is called pass-through. One of its main advantages is that its adjustable rollers allow you to get different bending radii. Such a tool for bending metal can be manually or electrically driven, and its rollers can have a different design.

Rolls with a smooth working surface are designed for most sheet metal work, which involves bending blanks, making sections of pipes with a large diameter, etc.
Profiled rolls are necessary for bending elements of roof structures (ridges, valleys, drains, flanging, etc.).
The broaching bending machine can be additionally equipped with a support, a clamp and a traverse, which allows it to be used for manual bending of workpieces.

Such machines are equipped with a set of shafts of various profiles, which can also be purchased additionally to make the equipment more versatile.

How to start making a bending machine

To make a sheet metal bending machine, you will need a drawing of such a device or detailed photos of it. In addition, a number of important factors should be taken into account, such as the force that will need to be applied to use the bending machine, its weight and dimensions (on which mobility depends), cost and availability of components. As a result, we obtain the following initial parameters.

The maximum width of the sheet that will need to be bent is 1 m.
The maximum thickness of sheet material: galvanized - 0.6 mm, aluminum - 0.7 mm, copper - 1 mm.
The number of work cycles that will be carried out without readjustment or repair is 1200.
The maximum bending angle of the metal profile, obtained without manual finishing, is 120 degrees.
It is highly undesirable to use workpieces made of special steels (for example, stainless steel).
In the design of the bending machine, welded joints that do not tolerate alternating loads should be avoided.
You should limit as much as possible the number of parts of the bending machine that you will need to order on the side, resorting to the help of turners or millers.

It is very difficult to find a drawing of a device that would satisfy all these requirements, but it is possible to refine the most successful of them.

The most popular sheet bender design and its improvement

The design of the manual bending machine shown in drawing No. 1 can be easily improved. According to the above drawing, it can be seen that the sheet metal bending device consists of such elements as:

Drawing No. 1: To build our bending machine, we will apply this scheme

pillow made of wood;
support beam from a channel 100–120 mm;
a cheek, for the manufacture of which a sheet 6–8 mm thick is used;
processed sheet of material;
clamping beam made of corners 60–80 mm, connected by welding;
axis for the rotation of the traverse (made from a metal bar with a diameter of 10 mm);
the traverse itself is a corner with dimensions of 80–100 mm;
handle of the device, made of a bar with a diameter of 10 mm.

At the traverse of the sheet bender (point 7), which, according to the original drawing, is supposed to be made from a corner, a variant of execution from a channel is conventionally shown. Such a modernization will significantly increase the endurance of the traverse, which, when using a corner, will inevitably bend in the middle at a certain moment and stop creating a high-quality sheet fold in this place. Replacing with a channel will allow you to do not 200 bends without straightening or replacing this element (which is very little with more or less active work), but more than 1300.

The design of such a homemade plate bending machine can be further improved, which will make it more efficient and versatile.

Drawing No. 2: The main elements of the sheet bender

Drawing No. 2 allows you to understand in more detail the design of a home-made bending machine:

homemade clamp, made from a suitable corner (40-60 millimeters) and a screw with a heel and a collar;
cheek;
channel, acting as a support beam of the machine;
clamping beam bracket, made from a corner of 110 millimeters;
the clamping beam of the sheet bender itself;
axis of rotation of the traverse;
the traverse itself.

Reinforcing the pressure beam

Below we will consider the scheme of strengthening the clamping bar. However, if you initially have a fairly massive corner as a clamp, and you do not plan to bend excessively thick sheets on your bending machine, then it is quite possible to do without reinforcing the clamping bar in the described way.

In order to extend the service life of the clamping beam and make it comparable to the service life of the traverse, this structural element, which was originally made from a corner according to the drawing, should be supplemented with a base made of a metal strip with dimensions of 16x80 mm. The front edge of this base must be given an angle of 45 degrees in order to align its plane with the plane of the clamping corner itself, and a chamfer of about 2 millimeters should be made directly to the working edge of this element.

In drawing No. 2, the received part in the section is indicated in the additional figure at the top right. These measures will allow the clamping metal to work not in bending (which is highly undesirable), but in compression, thereby multiplying the service life without repair.

An additional 60th corner, welded to the rear flange of the main clamping corner, will keep it from bending up. In drawing No. 2, this is shown in more detail in the additional figure at the top left.

You should also take care of milling the lower plane of the pressure beam, which forms the fold. The unevenness of this plane, according to generally accepted rules, should not exceed half the thickness of the bent workpiece. Otherwise, it will not work to bend the workpiece evenly, without a swollen fold line. It should be borne in mind that the beam should be given for milling only when it already has all the welds, since their implementation leads to a change in the geometric parameters of the structure.

We increase the reliability of machine mounts

There is another big drawback in the bending machine - the scheme for attaching it to the desktop. The clamps that are provided in this fixture are a very unreliable fastening option, especially considering the rapid fatigue of welds. Such fasteners can be completely dispensed with, which will also avoid the need for welded joints and cheeks. The following steps allow you to solve this problem:

the manufacture of a support beam that will protrude beyond the desktop;
making U-shaped eyes at the ends of the support beam;
fixing the support beam to the work table with bolts (M10) and shaped nuts with paws.

If there are no more cheeks in the improved bending machine, then how to attach a traverse to it? You can solve this issue quite simply: use butterfly door hinges for this, which are usually used for hanging heavy metal doors. To fix such loops, providing a sufficiently high accuracy, you can use screws with a countersunk head. In drawing #2, this is further illustrated at the bottom right.

It is possible to bend many workpieces on a bending machine with a traverse attached to butterfly loops, since these loops are very reliable.

Complete structure

After assembly, an improved device for obtaining a metal profile looks like this:

reinforced support beam;
flywheel - threaded element;
a beam that provides clamping of the workpiece;
clamp for attaching the device to the desktop;
traverse, with the help of which, in fact, you can bend the workpiece.

The drawings show pressure flywheels, which in practice few people have. More often use ordinary screws with welded knobs. After welding the knobs, it is imperative to drive the thread on them, since welding can affect it extremely negatively.

Drawings of another version of the sheet bender

Detailed drawings of a bending machine very similar in design, but differing in the fastening of the traverse. The diagrams show the dimensions, which, of course, can be changed depending on the intended use of the machine.

The working elements of the zig-machine are rollers, and its use allows you to significantly save on the purchase of factory-produced roofing elements. If you watch a video showing the operation of such a device, it becomes clear that you can use it even at the place of direct installation of the roof structure.

To choose the right fixture for the manufacture of bent sheet metal elements, you can follow the following recommendations.

For a home craftsman who needs a bending machine from time to time, a simple device made from improvised means is quite suitable.
Those who from time to time fulfill orders for the installation of a roof will need a manual sheet metal bending machine and a simple zig machine.
Professionals who are constantly engaged in the manufacture of elements for roof structures and tin work need a factory device for bending sheet metal.
Manual is useful for those who are professionally engaged in the manufacture of elements of roofing structures. Optimal for such specialists is professional equipment, which is characterized by higher reliability and durability.

Russian-made sheet bender SKS-2in1, price 64 thousand rubles

If your plans still include the active use of a home-made bending machine to work on a more or less large flow, then be prepared for the fact that at some point your production may stop due to a breakdown. Since the steel used by home craftsmen for the production of do-it-yourself bending machines, most likely, will not withstand high loads, will quickly get tired and just float.

But for a household, not particularly loaded application, a home bending machine will be an excellent helper and will save a lot of money. It is necessary to take this moment into account and not expect miracles of endurance and performance from a simple home-made machine.

Before making a bending machine with your own hands, you can not only study the numerous drawings of such devices posted on the Internet, but also watch the training video. Perhaps, for some, the size of the described bending machine will seem too small, then you can consider the option of a home-made bending machine of a larger format. Of course, this is no longer a mobile machine, it is suitable for a small private workshop:

Advantages of a homemade sheet bender

Do-it-yourself production of a bending machine or the purchase of a manual through-pass bending machine are often interested in those who want to save a lot on the purchase of mass-produced corrugated board. Simple theoretical arithmetic shows: if you independently bend corrugated board with the help of such a device, then the cost of the latter will be 40% lower compared to the cost of factory products. But not everything is so simple.

If you purchase a factory-run machine for manual type corrugated board with an eye to small-scale own production, then it will cost about 60 thousand rubles. Meanwhile, such a manual sheet bending machine does not guarantee the stable quality of the corrugated board obtained with its help. The problem is that rolling in one pass will most likely lead to the appearance of overdrawn corners, from which cracks can subsequently develop. And rolling one sheet repeatedly, gradually changing the degree of pressure, is too long, laborious and, as a result, unprofitable. But on the other hand, it is quite convenient to make simpler parts from sheet steel with its help.

For a full-fledged Chinese-made rolling line for corrugated board, you will have to pay about $ 20,000. Of course, it consumes a lot of electricity (from 12 kW) and its installation requires a large area, which clearly does not fit into the plans and budget of most home craftsmen.

The most important thing to consider when purchasing a bending machine is the possibility of its quick payback. To achieve this for a master who uses such a device privately is quite difficult. In this case, it is more advisable to use a home-made sheet bender, which is suitable for the manufacture of bent sheet products of any type. With the help of such equipment, it is possible to bend both sheets with standard dimensions and non-standard products, which are in great demand during roofing, as well as many others.

How does a bending machine work

Before wondering how to make a bending machine, you should understand the design features of such equipment. First of all, such devices differ in the type of their drive. So, there are devices with a mechanical, electrical, hydraulic and manual drive.

Mechanically driven bending machines may use a flywheel with a friction clutch and a crank or a system of pulleys, levers and cables with a falling weight. Such devices, characterized by a shock impulse at the beginning of the working stroke, which then gradually weakens, are far from ideal in terms of the quality of the result due to the mechanics of their work and are used less and less.

The efficiency of sheet metal bending equipment, which is equipped with an electric drive, drops markedly with an increase in load in the form of a decrease in the size of the workpiece or an increase in its strength. If you try to bend a hard metal workpiece (for example, stainless steel) on such a bending machine, you may encounter the fact that the rotor of the electric motor will begin to slip, reducing torque and increasing power consumption.

Precisely adjusting the developed force to the resistance of the workpiece allows equipment with a hydraulic drive, but it is not cheap. A conventional hydraulic jack, which can also be used as a drive for bending sheet metal, does not provide an even distribution of force from it along the entire length of the bend.

To summarize all of the above, it turns out that a manual bending machine is the best option for home craftsmen. It can be made in various designs.

Do-it-yourself sheet bender: drawings, video, description. A huge number of products can be made from sheet metal - a gutter system, shaped parts that can be used to sheathe a roof, a low tide for a basement, corners for buildings from a profiled sheet, and so on.

All this can be done by a special bending machine, in other words, a bending machine, which is not difficult to do with your own hands. We'll talk about this.

There are three types of sheet bending machines:

simple manual, in this case, the bending of the metal is performed by applying force. Such devices make it possible to avoid sheet materials at any angle - from a few degrees to 360.
hydraulic machine, in which, with the help of blows, the sheet metal is bent into the shape of a matrix. The latter is straight, sometimes curvilinear. Such equipment is recognized as professional, and it is actively used for enterprises of large and medium capacity.
Roller / roller sheet benders, in which the sheet of metal does not bend strictly in a straight line, but is rounded off. With the help of such equipment, pipes or any similar products can be made.

All devices described are related to sheet bending machines. With your own hands it will be easiest to make equipment of the first type, and a little more difficult - the third. We will talk about them - how to make a sheet bender with your own hands + video.

Simple (manual)

Metal shaped parts are expensive, even more expensive than metal tiles, so it makes sense to make the simplest sheet metal bending machine, and use it to make any number of corners, ebbs and other parts that you need, while only for your size.

And yes, don't worry about the looks. On sale if the sheet metal is not only galvanized, but also already painted. In each design, the sheet will be tightly fixed, so when working, it will not slide on the table, and the paint will not be erased or scratched.

In places of bending, it will also not be damaged, so the appearance of the products will be decent. With due effort, your products will look even better than those on sale.

Listogib from Taurus

For the manufacture of such a machine, you will need any flat surface, for example, a table, it is desirable that it be metal, as well as 3 corners with a shelf width of at least 4.5 cm, and a metal thickness of at least 0.3 cm. If you have plans to bending long blanks (length more than 1 meter), it is advisable to take shelves with a greater width and thickness of the metal. Goods can be used, but this is required for bending sheets with greater length and thickness. You will also need 2 metal door hinges, and 2 more screws with a diameter of 1 to 2 cm, with “lambs” and a spring on them. You will also need welding in order to weld the hinges and make holes (or a drill with a drill, which is suitable for metal work).

For a do-it-yourself bending machine, we use 7 cm brands - 3 pieces of 2.5 meters each, 2 more bolts of 2 cm in diameter, a small piece of metal with a thickness of 0.5 cm.

The procedure is as follows:

This option will be the most powerful - you can bend long workpieces and thick sheets. Although such scales are not always in demand, they can always be reduced. In the video there is a construction of a similar type, but slightly smaller and with a different clamp bar mount. By the way, you can install a spring on the screw and then it will be easier to raise the bar. The design is interesting because flanging can be carried out on it, but standard devices cannot do this.

Listogib from a corner with a clamping bar

This model is made of a corner with thick walls, the bed is made in the form of an ordinary construction goat, which is welded from a similar corner. The handle was taken from the luggage trolley, and the design of the screws is interesting in its own way - they are long, the handle is taken out in the form of the letter "L". It is easy to unscrew and screw in place.

It is not difficult to make such a bending machine with your own hands, but consider some features:

The corners are not shelves to each other, but have a direction in one direction. Because of this, fastening the hinge is not the most convenient.
At the bend of the far corner, weld small stop plates for the plank on both sides.
On the same bar, weld the nut from the screw (on both sides).

Now you can go directly to the clamping bar. It can also be made from a corner, but it should be laid on the machine with a bend up. In order for the bar not to bend during operation, reinforcement is welded - metal jumpers. From both ends of the bar, weld small metal pads in which holes for the bolts are made. And one more thing - the face that is turned to the place of the bend is required to obtain sharp corners on the bend.

The clamping bar must be installed on the machine, and springs should be placed at the installation site. Put the handle back in place. If it does not press the bar, due to the elastic force of the spring, it will be raised above the surface. In this position, fill the workpiece under it, expose and press. Such a sheet bender will be a good option for use at home. You will not be able to bend thick metal, then galvanized and tin without difficulty.

Rolls for sheet metal

This type of sheet bender can be with three drives:

Hydraulic.
Manual.
Electric.

Do-it-yourself rolls for sheet metal are made with manual or electric drives. There should be 3 shafts in a manual one, and 3-4 in an electric one, but according to the standard, there are also only three. Such a machine requires a good base, which can be used as a bed or workbench. The basis of the design are rolls, which must be the same size. The two lower ones should be stationary, and the upper one should be mobile. By changing the distance between the upper and lower rollers, the radius of curvature can be changed.

Results

The machine is driven by a handle, which must be attached to one of the shafts, and then the torque will be transmitted to the remaining rollers through the sprockets. They should be selected in such a way that the rotation speed is the same. If it is planned to manufacture pipes on the equipment, the upper roller must be removable on one side and have a quick fixation system. After folding the sheet into a tube, you cannot pull it out in any other way.

A sheet bender, along with a pipe and bar bender, is a useful device in everyday life and construction services. Often, metal warehouses offer a service for bending sheet metal - for a fee. You can pay for one or more sheets to be bent - but when building a house yourself, you need your own sheet bender.

Bending machine device

Before making a sheet bender, decide what thickness and structure, as well as how many sheets you need to bend, how exactly they will bend. This will allow you to choose the scheme according to which the device will be released. The simplest mechanism allows you to bend sheet steel using a traverse. This device will easily bend a sheet with a width of not more than half a meter, by 90 degrees, using only the strength of the master's hands. Sheet metal is fixed in the machine with a clamp or a small vise. Bending in the selected place is carried out by pressing the traverse on it.

To get a right bend angle, you need a special insert in the form of a strip of metal or alloy, which adds elasticity to the bent sheet.

Complicated device - press brake with mesh and punch as an actuator. A sheet of metal or alloy is placed on a curvilinear or straightened matrix, and the punch (bending wedge) is pressed against the sheet to be bent, giving it the desired fold pattern. Such a machine is more often used in metalworking production, where bending of sheet iron is put on stream.

Homemade sheet benders at home, they can also work with a hydraulic mechanism, the role of which is played, for example, by a jack.

For such a machine, at least two identical jacks will be required.

In addition, their work must be synchronized, which is an additional complexity compared, for example, with rebar benders.

Professional sheet benders are made on the basis of a three-shaft mechanism. In them, a sheet of metal passes through controlled shafts. As a result, the bending radius of the sheet acquires different values for different approaches.

A special place is occupied electromagnetic plate benders. But it is difficult to make such a sheet bender on your own. Its positive qualities are small dimensions, silent process of bending sheets, high speed. Such a sheet bender works due to the electromagnetic field created between the bending surface and the matrix. The flexor is freely fixed with a spring, and the matrix itself is placed under it. The mechanism adapts to the shape of the bent sheet. An electromagnet is placed under the flexor (or in it), to which a rectified mains voltage is applied.

The matrix is attracted to the bender, and it instantly bends the inserted workpiece. In such a device, there may also be a sector bender, which allows you to make multi-level (composite) flanging.

Shaft sheet bender it is used, for example, in the manufacture of single-wall chimneys, where a pipe with a round or oval section has ideal dimensions. If the shaft mechanism has a certain profile, then it is good for the manufacture of roof gutters located around the perimeter.

If necessary, the shaft plate bender is equipped with additional plate bending shafts, which allow, for example, to obtain stepped or corrugated iron from a flat sheet.

Rolling machines are often equipped with a knife, which makes it possible to cut the sheet near the bending point.

In a manual bending machine, the working resource is most often chosen within the following limits:

number of sheets- not less than 1400;
sheet width- no more than 2 m;
bend angle- up to 130 degrees.

A larger resource is used not for homework, but for custom work.

Preparation of materials and tools

For the manufacture of a sheet bending machine, you cannot do without the following tools and consumables for them:

electric drill and a set of drills of various diameters;
Bulgarian, as well as cutting and grinding discs for it;
welding machine and a set of electrodes;
vise for a workbench, a set of clamps;
hand tool set(hammer, sledgehammer, pliers, center punch, chisel file).

To connect the tool, if there is no outlet located near the work site in the yard, you will need a coil extension cord of the required length.

As consumables you need:

corner profile from thick-walled steel;
bolts, nuts and washers(you can use growers);
channel(U-shaped profile with partially pointed edges);
rule(if it is used as a trigger element);
reinforcing bar(reinforcement with a smooth surface is acceptable);
ball bearing set(if the mechanism provides for their use).

Having prepared the necessary electrical appliances, consumables and materials, you can begin to manufacture a sheet bending machine.

Step by step instructions for making

Three types of plate benders - manual, shaft and hydraulic - imply several specific drawings. Let's start with the corner (tee).

From the corner

One or two corners as a base is the most common design. Here you will need a large flat area (workbench). Ideally, if its table top is upholstered with a thicker metal sheet than the one whose sheet you want to bend.

The width of the corner must be at least 4.5 cm, thickness - at least 3 mm. When bending longer (a meter or more) sheets, thicker and wider corners will be required, and a T-shaped ferrous metal (T-shaped, double corner) is also suitable.

Prepare two steel door hinges, 10-20 mm bolts and nuts, and springs. It is advisable to use butterfly loops, which have a countersunk screw head - their design is reinforced and will withstand significant overload.

Do the following.

Fold together two T-profiles. On both ends, cut notches for the loops on them. Trim the edge of each notch at a 45 degree angle.
File the third T-profile in the same way, leaving the notch on it deeper. Such a recess is needed to press the bent sheets, and moves effortlessly.
Weld the loops on both sides - from the front and back. Make sure that the welds are even and solid - the loop should not come off.
On one of the Taurus, remote from you at the moment, weld two bevels on each side. They will help to fix the retaining bolt of the clamping part.
Weld bolt nuts to bevels.
Fix the clamping bar (tee with cut side).
Weld steel plates on top with a hole in the middle of each of them. The bolt should fit easily into the hole.
Align the holes so that they align with the nut. Weld these plates.
Cut off part of the spring so that its force is sufficient to raise the clamping bar by an average of 6 mm.
Thread the bolt into the clamping bar, put the spring on it and tighten the nut. Install the same piece of spring on the reverse side. The pressure plate should rise on its own when the bolt is loosened.
Weld two pieces of reinforcing bar to the bolt head - they will serve as a handle for tightening.
Put on the resulting handles plastic or wooden lining, made in the form of tubes. It is acceptable to use old grips from a bicycle.

Listogib is ready to work. The device can also be made of I-beams. The upper - pressing - I-beam is fixed from the end on the bottom with the help of a hinge.

The second end of the I-beam is held by a wedge or eccentric.

From the channel

If you replace the angle or tee profile with a U-shaped channel, the life of the bending machine will increase significantly. The main parts installed on the channel remain unchanged.

The traverse when using the channel will not bend prematurely. The corner, in turn, is less resistant to overloads - the slightest bend will drastically reduce the quality of work, which is why sheet steel will have to be bent after straightening and adjusting the machine.

From the rule

A device for bending sheet steel based on a rule differs from a corner one in that instead of a corner or “brand”, a conventional aluminum rule is used as a clamp, used in plastering work and for leveling concrete floors during screeding. It practically does not deform when bending sheets up to 0.7 mm thick, however, if you exceed this limit, and also bend too short a piece of the sheet, then the rule is guaranteed to become dull. It is replaceable - it is easy to replace a worn-out rule with a new one.

A beam is used as a bending traverse, bending the sheet steel around the clamping axis, deforming the steel sheet until it bends in a given angle.

from wood

The wooden parts of the sheet bender will save you from the excessive mass of the device. The fact is that a classic corner or channel bending machine weighs 100 kg or more, which makes it impossible to move it. If a rail is used as the main structure, the weight will increase by more than 200 kg, and it will require a floor area under a canopy with reinforced concrete pavement.

Wooden bending machine bends steel and aluminum up to 1 mm thick.

You will need hardwood, when using pine and spruce, the wooden parts will immediately become dull and deformed. The advantages of a wooden structure - no need for welding - all bolted connections. A wooden machine is easier to make. It is suitable for bending roofing sheets and for purely tin work.

Often, a steel machine is improved by weight, using a wooden board as a pillow.

From the rail

Manual sheet bender with rail is designed for bending steel with a thickness of more than 2 mm. Roughly speaking, they can bend thick sheets from which steel garages were built earlier. The clamping of sheet metal is carried out using a rail. The depth of sheet feeding can be unlimited - such a machine will bend the sheet in any place, no matter how long it is. The performance of manual rail-based sheet benders is tens of linear meters of sheet every hour, which allows you to put metal bending on stream.

The length of the rail can be up to 2.5 m.

From bearings

The roller sheet bender, unlike the loop bender, has an increased travel accuracy. If the bearings are selected according to the load that falls on the bent sheets and well lubricated, the three-roller unit will work for at least several years, even with everyday use.

The description of the manufacturing process of such a machine is as follows.

Drill a couple of holes in a piece of square tubular profile. They are needed for steel rods with a diameter of up to 8 mm.
Weld these rods to the pipe and install plastic plugs. The working part of the machine is ready.
Saw rectangular cuts in two pieces of steel angle.
Place the corners in a vise on a workbench with spacer washers between them. With the help of washers, a slot is set into which a bent steel or aluminum sheet is placed.
Weld 2 smooth and perfectly round pins to the corners.
Slide the ball bearing sets onto the pins.
Drill a hole in the central part of the corners.
Insert into these holes a component consisting of a profile pipe and 2 rods, welded earlier.
Attach bushings to the rods and weld them to the corners.
Put ball bearings on the ends of the rods.

Assemble the structure and lubricate the bearings by pouring lithol, grease or graphite grease into them. This unit is great for tin.

Do not use a wooden bender to bend sheets thicker than 1mm.- this will lead to its rapid breakdown. It's not designed for that much effort.

On the other hand, do not use a bender that is too powerful for thin steel. Too fast bending will cause the sheet to break., resulting in a crack. Especially cracks destroy ordinary galvanized sheets over time. Each device is designed for a specific load.

Bending steel with a thickness of more than 2 mm on a powerful bending machine is sometimes beyond the power of one worker. Even when the bender has long arms, the help of other workers may be required. On professional manual sheet benders, workers bend steel sheets in two, three, or use a mechanical device with a 12-kilowatt motor. The latter option is applicable in a factory where, for example, corrugated roofing sheets, "ridge" corners, boxes, L-shaped strips for thresholds and several other types of products are made from strips of finished sheet steel.

A well-made sheet bender will not even scratch the paint or galvanizing on the steel sheet, bending it. To avoid scratches and abrasions on such a coating, insert the sheets into the bender very carefully.

Any sheet bender is subject to gradual wear, even if it is heavy-duty and high-quality. Moving, rubbing rotary parts (hinges, bearings) must be lubricated at least once a year - with rare, episodic work. Frequent and long work may require lubrication once a month, quarter- these parts experience increased overload and are not completely devoid of friction. Check the leading edges - over time they can also become dull and jagged, and the sheet metal bends worse and rougher, with bumps and dented areas.

Do not use stainless steel sheets as material. The significant toughness of such an alloy makes these sheets difficult to process.

When making a plate bender, avoid welded joints that are harmed by loads that constantly change direction to the opposite.

Try to keep the machine as simple as possible without adding unnecessary details. Simplicity is the friend of reliability. Extra parts can add extra weight.

The sheet bender is not suitable for bending workpieces, which are then used in artistic forging - its knife is not designed for figured cutting of steel workpieces from 2 mm. The bender's knife basically cuts only straight. Use specialized metalworking machines of a different level that solve this problem.

When working with power tools, including power benders, use gloves, goggles and overalls. This will reduce the chance of injury from careless movement. Worker's ammunition should not cling to the device itself when working.

Conclusion

If the manufacture of a manual sheet bender turned out to be beyond your strength and knowledge, you should use a ready-made device. It costs about 60 thousand rubles. But this method is good only for those who do not want to miss out on profits by putting bending work on stream.

home » Home overhaul » How to bend rebar, sheet metal, etc. without a special tool

How to bend rebar, sheet metal, etc. without a special tool

If you have already started a major overhaul with your own hands, regardless of where it is carried out: at home or in an apartment, then you need to be prepared for many tests.

In particular, a number of issues may arise that are very difficult to solve without proper experience and special equipment. For example, not everyone knows how to bend a sheet of metal, rebar, profile, corner, etc. while getting good results. In this article, we will try to answer the "inflexible" questions, while getting by with a minimum amount of tools.

Very often, when mounting metal structures, it is necessary not only to cut steel sheets, but also to give them a curved shape.

You can do this at home without spending money on third-party services. For example, how to bend a sheet of metal? To do this, we need a wooden or rubber hammer, tongs, a table. If a 90 degree curvature is expected, then this set of tools should be enough.

The sheet simply hangs from the edge of the table, after which the desired curvature is achieved by uniform tapping in the bend area.

DIY bending machine: Drawings

If the workpiece is relatively small, then you can use a vice, in which, with the help of two wrapping bars, you can firmly fix a sheet of metal, and only then bend it with a hammer. If necessary, the bending point can be heated with a gas burner, but this method is not applicable to galvanized products!

bending a sheet of metal

If we are talking about a thin metal sheet, then the bending procedure can be significantly simplified.

To do this, the metal is “scratched” at the bend (we use a rule or a metal ruler, as a cutter - a pointed piece of a hacksaw blade for metal). The metal cut to half the thickness subsequently easily bends along the outlined line. We can say that we almost figured out how to bend a sheet of metal.

We bend galvanized

How to bend galvanized?

It can be either a galvanized metal sheet or a finished product, for example, a profile. The sheet is bent in the same way as when bending any other metal sheet.

How to bend a profile? You will have to deal with him. To obtain a large radius of curvature of a square or rectangular profile, you can use the following method: we tightly fill the profile with fine sand, clog both holes with wooden stakes, and only after that, gently tapping with a mallet, bend it. To bend a U-shaped profile (this, in principle, also applies to obtaining sheets of a curved shape), it is necessary to additionally use an object-shape, the curvature of which corresponds to the finished part.

To facilitate the bending process, triangular elements can be cut out in the profile.

Then the product to be bent is “wrapped” around the object by uniform tapping with a hammer.

Important! In order for the fold to be as even and correct as possible, the hammer blows should be light and lie as close to each other as possible. How to bend galvanized easier? Using a grinder, we make one or two cuts in the bend area (thus the structure is temporarily weakened), bend the product, and then weld the bend. This approach is important to use when bending profiled pipes and products of complex metal shape.

Remember that it is impossible to heat galvanized steel to simplify the curvature!

Perhaps one of the most difficult tasks facing people who are thinking about how to bend the corner. To get a solid product, you will have to sweat, evenly and slowly tapping the surface of the corner, gradually arching it. It is recommended to use a gas burner, which can heat up the bend.

You can do it easier - use a grinder as in the case described above with a galvanized product. It’s even easier to buy an already curved product, then the question “how to bend a corner” will disappear by itself.

How to bend rebar

At home, it is quite possible to bend the reinforcement, however, a lot depends on your physical data and the diameter of the metal rod.

How to bend rebar? To do this, we need two pieces of steel pipes, the diameter of which is greater than the diameter of the bent rod. The longer the length of such pipes, the easier it will be to bend the reinforcement (gain in strength due to the leverage).

All that needs to be done in order to bend the reinforcement is to insert it into two pipes and, fixing one of the pipes (pressing it with your foot or resting it between the posts), wielding the second one as a lever, give the reinforcement the desired curvature. That's all!

Cutting metal at home is a boring process. And its quality often leaves a lot of desire, thus imposing additional processing on acquired faces. Fixing the situation in several ways allows you to use special devices, including those that you make yourself. We will talk with you today about one of these devices, namely the steps.

Rollers for metals

Today, the roller knife is becoming more and more popular.

This is due not only to the high performance of such a device, but also to its rather simple device. The principle of the mechanism is simple: two cutting discs rotate in different directions, are compressed into a metal surface and thus cut.

The friction between the metal and the knives ensures that the workpiece runs smoothly along the tool.

In most cases, sheet cutting knives include two rotating cylinders - upper and lower. Depending on the variation of the cutting element used, these tools can be classified as follows:

Parallel position knives - used to cut metal on strips, while providing a very acceptable quality;
Edges with one inclined - this group allows not only longitudinal cutting of the material, but also the cutout of round and round beams;
Knives with several tilting devices allow you to effectively flicker a circular, curvilinear or annular formation with a small radius.

It should be noted that all the above changes are perfectly processed when cutting sheet metal, while the cutting edges do not require additional attention and post-processing.

Home roller blades

With all its clear advantages, even the simplest knife model is a worthy value.

DIY bending machine: 7 steps to implementation

This is the reason for the inaccuracy of its acquisition for one-time work or occasional use. But the best solution from a financial point of view still exists - you can manually make a foot roller at home.

The design of such a device can be very different.

Below are the most common changes (photo, photo 2). In any case, the main part remains unchanged - the cutting knife.

It must be made of the strongest and most reliable steel alloy, the characteristics of which must necessarily exceed the analog parameters of the material being cut. If this condition is not taken into account, the quality of the cut will be poor, which will require additional processing of the cutting edges.

Practice shows that the working source of knives of a manufacturing plant is about 25 km of steel sheet if its thickness is 0.5 mm.

If the thickness is greater, the source will be lower. However, this tool can be almost problem-free and continue to function effectively.

If we are talking about the source of domestic knives, it directly depends on the material from which the cutting parts of the device are made.

What can you make a knife out of?

The options can be very different, here you should pay attention to what is planned to be reduced.

Thus, if the strongest steel sheet is not available, including aluminum, galvanized metal and other similar materials, the most correct decisions will be the right ones. The truth is to pre-sharpen your goals.

For cutting, one of the cylinders is mounted on a handle that will act as a drive that forces the knife against the metal.

Note that the larger the diameter of the bearings, the faster the material can be cut.

You can optionally equip the device with guides that will not be difficult for special ones, but in the future it will be good.

The resulting tool is very versatile and can be used in conjunction with a variety of metalworking equipment, including bending machines, which can also be made independently at home.

Do-it-yourself sheet metal bending machine

A sheet bending machine is a tool that is distinguished by its rather simple design, which, however, does not in the least prevent it from demonstrating amazing productivity and efficiency when performing bending work. It is about how to make such a device with your own hands and with minimal financial investment, we will talk with you today.

Bending technology and its features

In the process of metal bending, its inner layers are compressed with simultaneous stretching of the outer ones, while the applied stress exceeds the maximum allowable stress for this sheet metal.

As a result, the sheet of metal is bent to a pre-selected angle. The degree of deformation of the material depends on various factors, primarily its thickness, the speed of the operation and the required bending angle. And you should not forget about the plasticity of the metal.

I would like to draw special attention to the fact that bending must be carried out in full compliance with the technological process - the slightest deviation can cause various, including quite significant defects, nullifying all the efforts made earlier.

Materials and tools

To make a bending machine with your own hands, you will need the following:

Welder;
Steel I-beam;
Corner;
bolts;
handles;
clamps;
Loops.

Making a machine with your own hands - the initial stage

A self-made bending machine includes the following components and components (Fig.

Base;
clamp;
flywheel nut;
Crimp punch with lever handle;
Clamps fixing the fixture on the workbench.

So, in order to make a sheet bending unit with your own hands, you should first of all take care of arranging its base, which is made of a metal channel No. 6.5 (you can also No. 8), the length of which does not exceed 0.5 m (this parameter can be selected at your discretion) .

The clamp, which is based on a corner, allows you to bend sheets at an angle of more than 90 °, which is especially important in a situation where a seam connection of sheets is required.

The design of the clamp itself is welded, the main corner under No. 5 is reinforced by means of a profile from the corner No. 3.

DIY sheet metal bending machine

For maximum rigidity, the thickness of the corner shelves should be at least 5 mm. The length of the clamp should be less than the base by about 70 cm, while at its ends brackets are welded from corners No. 3, the wall thickness of which is also 5 mm (Fig. 2).

The edges of the corner, especially those that will be in contact with the metal, are filed or milled so that they are parallel to the base.

An 8 mm hole is drilled in the middle of each bracket.

For a crimping punch, corner No. 5 is used, which is 10 cm shorter than the clamp. The lever handle is bent from a reinforcement bar with a cross section of 15 mm, giving it the appearance of a bracket, and then welded to the punch. From a sheet of metal, the thickness of which is 5 mm, cheeks are cut out and holes are drilled in them by 10 mm.

A chamfer is removed from the ends of the punch ribs - a depth of 5 mm, a length of 30 mm, which will allow you to install steel axles made of a rod with a cross section of 10 mm.

The direction of the axes to be welded must coincide with the edge of the corner. Similar chamfers, but slightly larger - length 32 mm, depth 6 mm, are also removed from the edges of the base.

Homemade bending machine - work continues

We continue to manufacture a bending unit with our own hands. The turn of pre-assembly of the device has come. To do this, the punch and the base are installed in a vice, making sure that the shelf of the corner and the channel arrive in a single plane horizontally.

The axes of the punch are supplemented with cheeks, fixing them by welding or in any other convenient way.

Trial bending is carried out on a soft sheet of metal (1 mm thick). It is laid on the base, and rollers and a clamp are pressed on top of it, pressing it to the base with pins or clamps. If necessary, after trial bending, the position of the cheeks is adjusted, after which they are finally welded to the base.

Through the holes in the brackets, holes are drilled on the base - a section of 8 mm, after which an M10 thread is cut into them.

The holes in the clamps expand up to 10 mm. Bolts are screwed into the base from below, fixing their heads by welding.

The clamped base is tightened with M10 nuts with washers placed under the heads.

For the reverse pressing of the clamp, springs pre-dressed on the bolts are used. Although rubber shock absorbers are far from the worst choice.

For the manufacture of mounting clamps, corner No. 3 is also used. Their design can be found in Figure 3. Support pads are installed on the M10 clamping screws, and the clamps themselves are mounted by welding near the cheeks on the base shelf.

Buying or self-manufacturing - what to choose

That's actually all.

We figured out how to make a bending machine with your own hands. But the question arises, is it not easier to buy a ready-made device in the store? Let's get a look. Practice shows that the advantages of a home-made machine are more than obvious - in the overwhelming majority of cases, factory models are quite large and capable of bending sheet metal up to 3 m wide, the cost of such devices is very, very significant, and the mechanical drive with which they are mainly equipped is not at all suitable for fine work.

Another thing is a hydraulic type drive, although the cost of such equipment is so high that it is impractical to use it even when performing permanent work in small volumes.

So it turns out that apart from a manual drive for home use, nothing remains. It is easy to set up and operate, the cost of its manufacture is minimal, it is quite possible to make it independently and without using any specific equipment, while the quality of work in many respects is in no way inferior to purchased models.

Sheet benders, or sheet bending machines, are called specialized equipment, which is intended for cold bending of metal sheets, as well as the formation of profiles of the required configuration.

Machine-building plants carry out the design and manufacture of manual bending machines, as well as machines with pneumatic, hydraulic and mechanical principles of operation.

The use of sheet benders

Sheet metal bending machines are used for the production of sheet metal profiles, which are used in the construction of metal roofs, ventilation systems and drains.

Also, with their help, individual elements of various sizes and shapes are made for finishing the facades of buildings.

The production of roofing and facade elements by means of sheet bending is of great importance in the production and construction market, and there are reasons for this.

DIY manual sheet bender drawings

Significantly expanded technological capabilities in metal processing make it possible to produce high-quality metal products on bending machines. With the help of sheet benders, it is possible to produce both standard and non-standard products from steel sheets of various thicknesses in accordance with the technical characteristics of a particular machine, which can be manual, hydraulic, pneumatic or electromechanical.

Manual sheet benders are usually used in small industries or in construction. Their distinguishing features are convenience in the process of work, durability and reliability.

Mobile sheet benders

Mobile manual sheet benders are used for work directly at the construction site. The whole process is characterized by mobility and high productivity.

Due to the low weight of the structure, the machine can be easily moved around the construction site. It can be quickly assembled and disassembled. In addition, the transportation of this type of sheet benders is not difficult.

Stationary sheet benders

Sheet benders, whose work is based on the hydraulic principle, are used when there is a need to process metal sheets exceeding 0.8 millimeters in thickness.

Compared with manual bending machines, the process of manufacturing parts is greatly simplified, while their quality is higher.

Such machines are widely used for serial production of steel profiles of the same type. On electromechanical (mechanical) bending machines, the production of parts is carried out due to the operation of an electric motor with a gearbox attached to it.

Such equipment is stationary.

Mechanical bending machines are versatile and compact. With the help of such sheet benders, almost any metal elements can be made. Electromechanical sheet bending machines can be made in several versions, including those with an increased level of wear resistance. On the listed modifications of sheet benders, it is possible to manufacture products from various metals, for example, such as: stainless steel, copper, aluminum, galvanized steel sheets, painted metals.

At the same time, a protective strip or a vinyl insert does not allow the machine to damage the coating. Accordingly, high-quality and reliable manufacturing of the product, carried out in compliance with all necessary requirements, is guaranteed.

Principle of operation

The production of profiles using sheet bending machines includes a certain sequence of operations. The original sheet of metal is pressed and bent. Then, if necessary, it is additionally bent to the required angle, after which the metal profile is cut to a predetermined length. The uniform clamping of the sheet along its entire length is ensured by the pressure bar, which makes it possible to give the product manufactured on the sheet bender a perfectly flat surface.

In the process of bending, the accuracy of the bending angle is carefully set, as a result of which high quality of the product is ensured. Some plate bending machines are equipped with a device for cutting steel sheets. For example, circular hand knives with hardened rollers (with their help, metal cutting is very professional), roller knives, electric vibrating shears. The cutting equipment is characterized by increased wear resistance and will provide cutting of high quality metal throughout the entire service life, which will make it possible to produce high quality products.

Much attention should be paid to the safety level of bending machines. Personnel must be protected as much as possible from possible injury when work on sheet benders. As an auxiliary function, access restriction for an employee who violates the technological process in the manufacture of parts on such machines can be applied.