How to bend a pipe without a pipe bender - proven options for different types of pipes. How metal pipes are bent: technological subtleties of work Bending pipes

Types of pipe benders

There are special devices - pipe benders, which just exist so that you do not have to work "on your knee". And if the volume of work is not small, it is worth considering purchasing this tool.

They differ in the way in which they bend:

1. Spring - used for metal-plastic products.
2. Segmented - a segment blank is used that pulls the tube around itself.
3. Crossbow - The product is placed in a special shape and pressed in the middle of the segment.
4. Drone - for small Ø thin-walled pipes.
5. Rolls are another option designed to work with products of square and rectangular cross-section.

When using a pipe bender, do not forget to lubricate the place of the alleged deformation with machine oil.

Depending on the force from which the tool works, it can be:

• Manual.
• Hydraulic.
• Electric.

The last two options are used in production. For household needs, hand-held pipe benders are purchased.

So, you can make an angle, turn or give another shape to pipes at home. You just need to remember to protect the fold with limiters.

Video on the topic

Many works in the country require specific skills. For example, we need to make an arch under the grapes, which would have a sloping, spherical shape. Naturally, for this, the working material must be brought into the appropriate form. We take a regular or shaped pipe with the hope that it will easily succumb to our efforts. But everything is going a little differently, as we expected, and if the bend even turns out, it is crooked, uneven, moving away from the given place by a few centimeters. Very rarely, in about only 10% of cases, it is successful to bend a product with your own hands without special means. But this result is not very suitable for us for obvious reasons. Therefore, the site decided to present modern and classic methods that will help to bend a metal tube quickly and strictly in the right place.

Where in the country can a bent pipe come in handy

Do not think that this material does not concern you in any way, since you are not going to build something round or similar in shape.

A bent pipe is necessary in very many cases:

• For the construction of arches, arbors and sheds;
• When building fences, hedges and more serious fences;
• In landscape design, for the device and construction of small architectural forms;
• In the case of working with engineering systems on the site, with the same sewerage or water supply;
• For the production of country furniture, light and small frames, etc.

One of the times when you need to bend a metal tube is to keep the material intact. For example, when working with the assembly of frames ... here you can always cut the source into two parts and connect them at the desired angle by welding or bolts and nuts.

But you can leave the material intact, and then you will definitely need to bend it.

So, there are several ways that will help to bend the pipe efficiently and according to a clear mark.

How to bend a metal pipe

To produce such a deformation, simple machines are often used in the country - pipe benders:

• Manual pipe benders. Such machines are used for bending small diameters and most often for non-ferrous metals. The process itself is quite simple - you need to install the tube into the machine, fix it, and then, using a special lever, make a fold. You can change the diameter by advancing the product in the machine and sequentially making additional folds, if, of course, your machine allows it;
• Hydraulic benders work in much the same way, but they don't require much physical force. The main action falls on the hydraulic cylinders;

It is necessary to consider the types of pipe benders, depending on the requirements for bends and materials for the manufacture of pipes:

• Dornovy pipe bender - for products with a thin wall and small diameter;
• Spring - for manual bending using a spring (for small tubes);
• Crossbow - a machine with a finished shape for bending;
• Segment pipe bender is a machine that works by drawing a pipe around a special segment.

You can bend a metal product on a plane-parallel plate. So, having installed the workpiece in the clamps, a force is applied, due to which the pipe takes the shape of a plate. It's pretty simple and the fold is good. But in the case of working with a plate, you will receive products of exactly the same shape, with an identical bend. This is the whole low practicality of the method, since in order to obtain other forms you will need to have several plates at the dacha.

There is a way that uses a metal spring. But he works with non-ferrous metals, which are soft.

The object of work is installed inside the spring, clamped with one edge in a vice and bent to the desired diameter. In this way, compressive and tensile forces are transferred from the pipe walls to the spring, and the chance that colored thin-walled material will burst is seriously reduced.

How to bend a pipe using sand

Sand is poured inside the pipe so that it completely occupies the entire internal space. Next, the edges of the product must be plugged so that the sand does not spill out. The next step is heating the metal in the place of the future bend, which can be done with a burner. The last stage is fixation and effort, due to which the required shape will be obtained. After work, sand is poured out of the tube.

It is very important not to bend galvanized and painted products with the help of heating, because at the place of bending, a violation of the protective or decorative layer is possible.

Is it possible to bend a profile pipe

It is clear that due to its shape, a square or shaped tube has increased rigidity. Therefore, serious skills should be applied here, but do not forget that there are expert advice for such cases.

So, sand is poured into the pipe. It is desirable to be denser if you want to preserve the normal shape of the product at the fold as much as possible. It's easy! First, one edge is closed with a wooden peg, then sand is poured inside, and the second edge is also closed. The tube is set in a vice and straightened with a mallet until it gets the desired shape.

It is possible to warm up the metal at the bend point, and even use a pipe bender designed for a profile pipe, but any assessment of the possibilities and subsequent actions takes place directly on the spot.

We use a grinder and welding

To be honest, this is a very controversial method: using it takes a lot of effort, since you are doing double work. Moreover, if it is necessary to bend a lot of pipes, then money is also wasted, because electricity is very expensive today, and a lot of it is needed for the operation of a grinder and a welding machine.

The method consists in the fact that several cuts are made at the bend of the pipe, due to which it loses its strength. Further, even by hand, the product is bent and the cuts are welded. Of course, the method is applicable depending on the need for the radius and the initial parameters of the object of work, but if possible, it is better to use other, simpler and faster methods.

How to bend a metal-plastic tube (video)

How to bend a reinforced plastic pipe

When working with heating, plumbing, or even at the time of building a greenhouse in the country, we also have to use metal-plastic pipes. You can bend them with the least effort and even very simple, but just as easily they can be rendered unusable. After all, outwardly, the product takes on the shape we need, but we do not see what happens to it from the inside. The material can be severely damaged, which will certainly affect its performance. Okay, if a frame is assembled from it for a spring greenhouse, but if the tube is needed for the heating system of a country house or for a water supply, then there may be trouble.

Bending the metal-plastic should be very careful, with gradual movements. Without sharp fractures, the pipe can be bent up to 90 degrees, absolutely without damage. But this must be done not in one place, getting a sharpened angle, but for at least a few centimeters, moving the bend along the pipe. Thus, you can even bend the tube to its opposite direction, that is, up to 180 degrees. This is often necessary when installing a warm water floor in the country. Only it is necessary to comply with the mandatory requirement - to make not one steep fold, but two 90 degrees each, at a distance of 10-15 cm from each other. Then no problems are foreseen.

When bending a metal-plastic pipe, you can also use sand, which helped us earlier with metal ones. The whole process is the same - sanding, blocking the edges and folding, but only fewer jerks and more precision.

Bending polypropylene

At the dacha, a p / n tube is also useful. It is suitable for plumbing work not only in city apartments, but also in any residential building. To bring some water to a new kitchen in a country house, to a summer shower, to a car wash - all this can be done with polypropylene.

It often has to be bent, although experienced plumbers use angle couplings for this.

They are commercially available in a large assortment, for almost any required degree, so we advise you to give the structure the desired shape by soldering and corners. But if you want to bend a p / n pipe at no extra cost, use the following method.

This method is very simple - heating with an assembly hairdryer. You need to work without sudden movements and only with gradual heating and bending. Strong bends should not be allowed, which can simply change the inner section. This will affect the pressure in the pipe, which we don't need.

The heated tube is bent and fixed in the required position until it cools down, then it is used as intended. You can also use sand here, but it is much better to take special components for work, which we talked about earlier.

You can bend the pipe with or without a special tool, but it all depends on the requirements for the type of the finished product and its quality. Therefore, we recommend that you do everything according to the rules, as well as using proven modern methods, because even in the country you need products that are reliable, practical and aesthetically attractive.

When renovating a private house or other home, curved pipes may be required. In this regard, the question of how to bend a pipe without a pipe bender at home becomes relevant. After learning the tricks of this process, you can do it very easily.

Right angle pipe bending techniques

Metal products are particularly durable, but a special effect on this material allows you to give it the required shape.

There are several ways to bend a metal pipe yourself:

• With pegs... With this method of bending, the risk of pipe defects or breakage increases. Filling the inner cavity with dry fine sand helps to solve the problem. It can be prevented from spilling out by using plugs at both ends of the pipe. After that, you can proceed to the direct bending of the tubular product. The workpiece is dug into the ground and using the lever method they try to perform bending. To test your strength, you can practice on unsuitable building materials of a similar composition. This method becomes the solution to the problem of how to bend a thin pipe, for example, with a diameter of 16-20 mm. It is allowed to use this technique for thicker structures, but it is worth remembering that this will be more difficult. It is especially important to remember that not all materials can be bent using this method. Galvanized products require other methods.
• Heating method... It is possible to change the shape of aluminum or steel pipelines when heated. The structure is filled with sand and fixed in a vice. With the help of a gas burner, the section of the pipe is heated where it is planned to bend. You can determine the temperature limit for heating aluminum pipes as follows: a piece of paper brought to the heated area should start to smoke (read also: ""). With sufficient heating of the steel product, a pronounced redness appears. Gloves are essential for safe work.
• Using a plane parallel plate... To perform the technology, the pipe is fixed in a clamp, then bent along the plate. This method is simple and economical, but the constant shape of the plate does not make it popular. A high-quality result can be obtained when using a large number of plates with different curvatures. In this case, the pipe should only be steel and of a sufficiently large size.
• With a metal spring... Using this method helps in solving the question of how to bend a copper pipe without a pipe bender (more: ""). The spring prevents possible deformation of the pipe during bending. A good result can only be achieved by considering the size of the spring. Since it is inserted directly into the pipe cavity, it must have a size corresponding to the inner diameter of the product being bent. The tube with the spring inside is carefully bent. To avoid problems with extracting the spring, a wire is tied to one end of it.
• Using water as a filler... The pipe cavity can be filled with ordinary water instead of sand, the main thing is that it does not contain impurities. Water is poured into the pipe, plugs are inserted at both ends and frozen. After that, the pipe must be heated. This method is not recommended for galvanized products.

How to bend a profile pipe

Greenhouses of various sizes and purposes, gazebos and other structures on the site are built using shaped pipes. Such metal structures have one distinctive feature: pipe bending with or without a pipe bender leads to deformation of the workpiece (flattening or cracks can be observed). It does not hurt to know how to bend a profile pipe at home correctly so as not to damage the material.

Bending options for a pipe with a square profile

Quite often the problem arises of how to bend a metal pipe with a square profile. A square pipe with a small cross-section can be bent without heating, but having previously filled the cavity with sand or water. The only difference from a round blank is the required presence of a rubber mallet.

The pipe is installed on two strong supports and the part is bent with a mallet. To avoid possible damage, actions must be smooth and accurate. A sufficiently large bending angle can be obtained by additionally heating the profile pipe at the bend section.

Bending of metal-plastic

Quite often, metal-plastic pipes are used when arranging a warm floor system. The efficiency of this system is ensured by the parallel operation of the pipeline and the heating system.

The underfloor heating system assumes an unlimited number of bends of the metal-plastic pipe. Unfortunately, such designs cannot be purchased in retail chains. Therefore, it is important to know how to bend a metal-plastic pipe at home (more: ""). For a high-quality result, it is necessary to study all the features of the material and the direct process of bending.

Similarly to metal blanks, you can get the necessary twist of metal-plastic elements in several ways:

• The simplest and least expensive way is to bend the pipe with your own hands. Without using the means at hand. To perform this action, the workpiece is clamped in the hands and smoothly begin to bend, while it is important to exclude a strong bend. The normal fold allows 15 0 for every two centimeters of the pipe.
• Another method involves the use of additional pieces of wire that fill the pipe cavity. With this method, you can quickly and evenly bend the metal-plastic workpiece.
• It is possible to bend a metal-plastic pipe using sand, performing actions similar to those carried out with a metal pipe. One end of the prepared product is firmly fixed and smoothly bent, heating the fold section with a gas torch or blowtorch. You can check the readiness of the metal structure for the folding process using a paper sheet.

Features of bending of polypropylene blanks without a pipe bender

The need to bend a polypropylene pipe occurs very rarely, since it is not recommended to perform such actions with the material.

However, if you cannot do without this process, then you can use the following methods:

• Heating the bend... To achieve the desired result, it is best to use a building hair dryer, the heating should be brought to a temperature of 150 0 C. Then you can bend the product, giving it the desired shape. All operations must be carried out with gloves that are resistant to high temperatures. It is important to remember one rule: the bend is made towards a less thick wall, that is, the thickened wall of the polypropylene blank should be placed on the outside of the bend. After the product has cooled completely, inspect it carefully. There should be no dents or cracks on the surface.
• The second method is cold bending... Polypropylene pipe can be bent by hand, but the bend must have a radius not exceeding 8 workpiece diameters. Otherwise, the material will simply break.

Effective bending of plastic elements

PVC pipes can simply be bent using specific instructions. By completing her points, you can easily and simply at home give the plastic pipeline the desired shape without resorting to outside help.

To bend a plastic pipe, do the following:

• In any hardware store, you need to buy a fiberboard, which is necessary for the construction of a special frame. With the help of this frame, the plastic blank is bent until the moment when the product takes the desired shape.
• Having bent the slab to the desired radius, its surface should be sanded. You can use fine sandpaper in this case.
• In the next step, silicone is used to form a shell for the bendable element. It must match the shape and size of the pipe. With the help of the cover, the PVC blank is fixed on the fiberboard frame. In addition, the shell serves as a kind of protection for the surface of the plastic pipe, preventing the formation of various defects, including scratches, chips and other mechanical damage.
• Further, the metal-plastic workpiece is placed directly into the shell.
• Now you can start heating the pipe element. Under the influence of high temperature, the material becomes softer and begins to take the shape of the frame. The result of the process is the product of the desired shape.
• The formed product must be cooled for 10-15 minutes. After this time, the modified PVC tube can be removed from the mandrel. After that, it is recommended to leave the finished structural element for a while so that it cools completely.

Despite the many ways to bend a metal pipe or a product made of another material, it is almost impossible to get an ideal result in a domestic environment. However, the study of theoretical materials and repeated experimentation on unusable pieces of pipe made of similar materials will help you understand how to bend a pipe without having a pipe bender.

The main thing is that after that you can deal with the process of bending pipe elements at any free time.

Every second man on earth at least once in his life thought about how to bend a pipe on his own. The process can be carried out using a special device - a pipe bender. If this is not available, then there are a number of ways how to bend a pipe at home without outside help. You will need personal protective equipment, lighting, a burner (construction hair dryer), sand, a vice.

Varieties of pipes

Before starting the process, it is necessary to determine the material from which the long hollow object is made. There is a specific bending method for each type of pipe.

Plastic pipes

Currently, the market is flooded with plastic goods, pipes are no exception. But it is worth noting that the wear resistance of such metal pipes is much less.

They are unlikely to be suitable for the operation of hot liquids, and in an open space under the influence of sunlight they will not last long. However, they are actively used for sewerage and cold water supply.

Reinforced-plastic pipes

Such pipes cope much more efficiently with temperature changes, are excellent for hot water supply, heating and are not exposed to frost. The pipes are composed of two materials, they in the connection provide the products with strength and durability.

The manufacturing method is a layer of plastic and thin sheets of metal. Despite the ability to withstand high temperatures, pipes are fragile and are damaged by strong physical impact.

It should be noted that in terms of composition, plastic pipes are divided into two main types: polyethylene and polyvinyl chloride.

The former are composed of various types of polyethylene, withstand pressure and high temperatures.

The second ones are made of polyvinyl chloride, thanks to this they are durable and resistant to temperature changes, but they are not used for water, since chloride has the property of being washed out of pipes and entering the substance, therefore, into the human body.

Metal pipes

These pipes are widely used in pipeline, oil and gas pipelines. To date, there is no stronger and more durable material for bulk pipeline networks.

Aluminum pipes

Despite the fact that this material is very flexible and easily deforms, it can only be used in industries or for the manufacture of structures.

Aluminum is capable of emitting harmful substances into the environment, therefore, it is absolutely not suitable for pipelines.

Pipe bending methods

First you need to decide how the process will take place, and what you need to have at hand.

If you have a Volnov machine or a pipe bender, then the bending process will not take much effort. With its help, you can make a fold in the form of a staple, bend, roll and duck. Pipes of different diameters from 15 to 25 mm are exposed.

The process is as follows:

• We place the pipe in the clamp of the machine with the long end
• The place where bending will occur should be lubricated with machine oil or other oil.
• Bend the short end of the pipe using force.

On the Internet, you can see the process in more detail in the photo, and understand how to bend a pipe using this machine.

If you do not have such a device at hand, you have to make a little effort and take the process seriously.

Visually, it seems that when the metal pipe is bent, everything goes well and the pipe does not deform. But in fact, folds form on the inside of the fold, thereby reducing the radius of the pipe, and on the outside, the material is strongly stretched, due to which there is a possibility of microcracks.

The faster the bending occurs, the more likely it is to damage the pipe and render it unusable.

Before you start bending the pipe, you need to heat it up to the optimum temperature for bending. Experienced craftsmen advise checking the temperature with a piece of paper. If, when the paper comes into contact with the pipe, it begins to smolder, then the process can begin.

To avoid unwanted sharp bends, fill the pipe with sand and seal it on both sides. Squeeze and start the process.

It will take some effort and it will take time, but you will not have to resort to the help of specialists, purchase special equipment, and you will know how to bend the pipe at home.

With plastic pipes, things are a little different. It is easier to bend them, but the likelihood of microcracking is much higher. Unlike metal, it is worth monitoring the heating temperature, otherwise the pipe will simply burn out.

Another disadvantage is that in the plastic, holes that are not visible to the eye or even their rudiments can form in the plastic, which in the future will make themselves felt at the most inopportune moment.

Pipes made of metal-plastic do not need to be warmed up, they already bend perfectly due to the presence of an aluminum rod inside, you just need to take care of the stabilizer.

Thin plastic pipes often break when trying to bend, so you need to warm up the place of the planned bend with a construction hairdryer to a temperature of about 180-200 degrees and carefully make a bend. This will happen easily and quickly, it is enough just to fix the finished bend and wait for the pipe to cool down.

The bending of shaped pipes is a little more difficult and should be approached more seriously. If the wall thickness of the pipe is less than 2 mm, it is not even worth trying to bend the pipe, it will be easier to use welding during construction.

Pipe bending is carried out with heated pipes and in a cold state. Undoubtedly, the heated pipe will be easier to bend. Heating can be dispensed with if the profile height is not more than 10 mm; in cases with a higher height, it is worth using a burner.

It is imperative to fill the profile with calcined sand, plugging the holes on both sides with wooden plugs, 7-10 mm long. Mark the bend with chalk, place the pipe in a vise and start heating. After reaching the desired temperature, gently begin the bending process.

It is worth remembering about protective equipment: gloves and a mask. After comparing the resulting bend with the template, making sure that everything is correct, wait for the pipe to cool down, remove the plugs and pour out the sand.

All methods show that you can independently and easily do without a pipe bender for bending pipes.

Save the article to your page:

Join the discussion:

Source: http://landshaftdizajn.ru/kak-sognut-trubu/

How to bend a metal pipe at home

If you independently carry out work on the laying of water supply networks at home, then you may be faced with the need to bend the pipe. Since you may not have professional equipment in the form of a pipe bender, this is quite difficult to accomplish. However, there are special methods that, without the help of professional equipment, will make it possible to bend pipes from different materials. In this article, we will describe several ways to bend a pipe at home.

Professional equipment

Usually such equipment is available from professional craftsmen and it belongs to the category of pipe benders.

Let's start with what special tools you can use to bend pipes made of different materials. Usually such equipment is available from professional craftsmen and it belongs to the category of pipe benders. All benders can be divided into several categories based on the bending method:

• Crossbow products have a certain shape, therefore, they are used to bend pipes with a suitable diameter.
• Spring tools are suitable for self-bending plastic piping. The equipment is made on the basis of a steel spring.
• Segment constructions have a special area around which the workpiece can be pulled out.
• Core tools are designed for bending elements with thin walls, as well as in the case when you need to obtain a small bending radius.

By the type of drive, such equipment is divided into the following types:

• The hand tool is suitable for bending small diameter workpieces made of thin-walled plastics, stainless steel and various non-ferrous alloys.
• Industrial hydraulic equipment is used to bend 3-inch pipes.
• The electromechanical tool is suitable for pipelines of different diameters. Its main difference is that you can easily achieve high bending accuracy (angle, radius).

Important: for bending the workpieces at home, a manual pipe bender will be enough. It is suitable for bending pipes made of aluminum, brass, stainless steel and thin-walled copper with or without plastic coating. The main condition is that the diameter of the pipes should not exceed 2.5 cm.

Self-bending metal pipe

If you do not have special equipment, then to bend a metal pipe at home, you can use one of the following methods

If you do not have special equipment, then to bend a metal pipe at home, you can use one of the following methods:

1. Usually, during bending, pipes can break or shrink in diameter. To prevent this from happening, the product must be filled with dry sieved sand. To prevent the sand from spilling out, we install plugs at the ends of the workpiece. The easiest way to do this is to prepare wooden chops and drive them in, but so that later it can be easily pulled out without deforming the pipe. Now the workpiece can be bent without fear that it will break and shrink in section. Moreover, if the pipe is made of soft metal, then the procedure can be easily carried out without the use of auxiliary tools. For denser material, an additional pipe of the required diameter can be used, which will be securely anchored in the ground or other equipment. In this case, we bend the workpiece using the lever principle.

Tip: in the cold season, you can use plain water instead of sand. We pour it into the pipe and wait until the water freezes. After that, we perform bending, let the ice in the workpiece melt by itself, or heat the product.

1. If you need to bend an aluminum or steel workpiece, then the procedure is done using a blowtorch or gas torch. To begin with, sifted fine sand must be poured into the piece of the product and the ends must be muffled. Then we fix the element in a vice. After that, we heat the area to be bent with a burner. It is worth heating until this place acquires a bright red hue. You can check that the aluminum pipe is hot enough with a piece of paper. If you bring it to a heated pipe, the paper should catch fire or start smoking. After that, we put on gloves on our hands to protect ourselves from burns, and gradually we bend the pipe.

Attention: it is better not to heat painted or galvanized elements before bending. Otherwise, you may damage their protective coating.

1. If you need to bend a square pipe (small size), then the procedure can be performed without heating. However, you will still have to fill up the sand or pour water in the winter. You will need a rubber mallet to bend. Next, we lay the pipe on two supports and bend the workpiece with the blows of a mallet in the central part. If the bend turns out to be too large, then the element in this place heats up and straightens a little. However, with this method, the shape of the profile product may be slightly disturbed. If it is very important for you to maintain the correct section of the profile pipe, then you need to find a strong spring of a suitable diameter (according to the size of the inner section of the element). We place the spring inside the workpiece in the area of \u200b\u200bthe bending point, tying it with a wire, so that later it can be removed. Now you can safely bend a section of the pipeline without fear of deformation of the section.
2. The expediency of using the method with a welding unit and a grinder is questionable, but we will describe it as well. To do this, shallow cuts are made in the bend area using an angle grinder. This reduces the strength of the product, after which it can be easily bent by hand. Then the incisions are welded together.

We bend metal-plastic elements

If you do not know how to bend a metal-plastic pipe at home, you can use one of the following methods

If you do not know how to bend a metal-plastic pipe at home, you can use one of the following methods:

1. The easiest way to perform this procedure is to simply bend the element with your hands, because metal-plastic is not as strong as steel. In this case, it is worth trying so that the bend configuration is 15 ° for every 2 cm of length. This method is suitable for bending workpieces that will be used in the installation of underfloor heating systems.
2. If you have small pieces of wire, then they need to be tamped tightly into the pipe. Bending can then be performed. As a result, you will get smoother curves than in the first method.
3. If you need to perform a smooth, high-precision bend, but you do not have a pipe bender, then you can use this method. To do this, we plug one end of the workpiece with a chop or other material. We pour fine sifted sand into the pipe so that it reaches the upper edge. After that, we drown out the second end of the workpiece. We fix the pipe in a vise and use a blowtorch to heat the area where you want to bend. In doing so, it is important not to overdo it, causing the plastic coating of the pipe to melt. The fact that you have heated the area sufficiently can be judged by the piece of paper. If you bring it to this place, it should start to smolder. After that, we put on protective gloves so that there are no burns, and we bend the pipe. Then we remove the chopiki and pour out the sand.

Working with a polypropylene blank

In the first case, we need to heat up the workpiece section with a construction hair dryer to a temperature of about 150 ° C

Usually, manufacturers of polypropylene pipes do not recommend bending them at home, but if you are careful, you can do this using one of two methods:

• In the first case, we need to heat up the workpiece section with a building hair dryer to a temperature of about 150 ° C. After that, putting on gloves, boldly bend the pipe and fix it in this position until it cools completely. For a much better result, you can fill the product with sand. In this case, it is important to adhere to one rule: the thickened part of the element should be on the outside of the bend. After the workpiece has cooled down, carefully inspect the bend, there should be no cracks or dents. Otherwise, the item cannot be used.
• Without heating, this type of pipe can only be bent using construction angle couplings and brazing.

Bending of plastic blanks

To bend plastic piping, you need to do the following:

1. In the fiberboard, we cut out a template that will help give the plastic pipe the desired configuration. The template should be carefully sanded with sandpaper so that there are no chipping and unevenness.
2. Further, a frame for a plastic blank is made of silicone on a molding machine. It will fix the section of the pipeline in the template and protect it from scratches, chips and dents.
3. We place the plastic element in the prepared silicone shell.
4. The part is then fixed in the frame and placed in a molding machine.
5. As the workpiece heats up, the plastic will soften and settle into the frame. As a result, the workpiece will acquire the desired configuration.
6. After that, it is worth waiting a quarter of an hour until the plastic hardens a little, remove the pipe from the rim and let it cool completely.

Source: https://vodakanazer.ru/truboprovod/kak-gnut-trubu.html

How to bend a pipe without a pipe bender with your own hands?

Surely you have come across a situation when, when assembling a pipeline, it becomes necessary to bend the pipe by a certain degree.

For such tasks, a special tool called a pipe bender is used. Pipe benders are very different. They are intended for bending pipes made of metals, plastic, various alloys, etc.

All this is of course very good, but what if you need to bend a pipe without a pipe bender? For example, if you do not have a pipe bender available, and business is urgent.

Bending a metal-plastic pipe with a spring inside

Well, there are ways to perform similar actions with your own hands. We will tell you about them.

Process features

It is actually quite easy to bend the pipes. It only seems that such actions require a huge amount of strength and energy. Of course, when working with metal pipes, you still have to sweat, but even in this case, the process takes only a few tens of minutes, and this is taking into account the preparatory work.

But simply bending the pipe is not enough. You need to do it right in order to end up with a working, not a damaged sample. If we bend the pipes with our own hands, then the chance of their damage increases significantly, since bending the pipe at home is possible only with the help of improvised means.

The thing is that the pipe, when bent, changes its structure, naturally deforms. And the deformation process is unpredictable.

In fact, this is not the case. At the moment of bending, especially if you work only with improvised means, the pipe walls are deformed unevenly.

The inner wall, as it were, accumulates more material at one point, becomes thicker, even microscopic folds are formed. The outer, on the contrary, is stretched, which is fraught with the appearance of microcracks. Bend it too quickly or without preliminary preparation - and its damage will be almost inevitable.

How to protect yourself?

However, you can easily protect yourself, or at least reduce the chance of damage to the pipe to a minimum. Several tricks are used for this.

Firstly, when bending with your own hands, the pipe is heated to a certain temperature. This is normal, without heating it is extremely difficult to bend a segment, and even a steel one. You will spend a lot of strength and energy, and the result is unlikely to please you.

Whether the pipe surface has reached the desired temperature is checked using ordinary paper. It is believed that the pipe has warmed up if the piece of paper begins to smolder upon contact with it.

Steel pipe bending process

The method, of course, is rather clumsy and gives only relative results, but more is not required for homework.

Secondly, a stabilizing material must be added to the pipe cavity. This is done before it warms up.

Various options are used as stabilizing material, from sand to springs. The pipe is plugged on both sides, and then they get to work.

Inside the pipe, sand acts as a plasticizer. It does not allow the material to deform in jerks, while maintaining the original shape of the workpiece, which is also extremely important.

Also, before starting work, it is necessary to create a wooden or steel blank to simplify the deformation process. It is not necessary to suffer a lot and create something, you just need to choose the right material.

For example, if you need to bend a pipe at a right angle with your own hands, then the presence of a profile pipe or a table is enough.

If the bend radius is large enough, then you will have to pick up a return pipe of the required size or a wooden log.

Differences depending on pipe material

The pipe material has a huge impact on how we interact with it.

Pipes are divided into:

• Metallic;
• Plastic.

Metal pipes require one approach, plastic pipes quite another. In addition, specific materials differ in their strength, stability, deformation principle, etc. All this should be taken into account, especially when we work without a specialized tool, that is, with our own hands.

Interaction with metal samples

Metal pipes at home are the most difficult to bend. By the way, you yourself understand that.

The metal, although ductile, is very durable. Manually, without preliminary preparation, you simply cannot cope with it.

It is advisable to heat the pipe with a burner before processing.

But if you think about everything in advance, then the result will certainly please you. Also, let's not forget that there are soft metals and there are hard ones. Non-ferrous metals are mostly soft. It's easier to work with them.

The same copper, if desired, is generally deformed by hand. It is really possible to bend a thin copper pipe with your hands, which is often what plumbers use.

Reinforced copper is already stronger, but it still doesn't match the strength of steel or good aluminum.

The working process

Consider an algorithm that allows us to bend metal pipe sections with our own hands.

Stages of work:

1. We prepare the tool, find the burner, collect sand, plugs, etc.
2. We fill up the sand inside the pipe.
3. We seal it.
4. We heat it with a gas burner.
5. We check the heating temperature. If the paper sheet caught fire or began to smolder upon contact with metal, then everything is fine, you can start.
6. We mount the pipe in working position.
7. We bend the segment using physical force. It is advisable to do this with gloves, as metals conduct heat well.
8. When the desired angle is reached, we leave the pipe for a day.

That's all. After completing the work, it remains only to check the quality of the bend. Unfortunately, this cannot be done in a heated state.

The sand should be filled up until the pipe is completely filled. It is advisable to take the plugs not plastic, but steel. Plastic can melt and bond with steel. Of course, nothing bad will happen, but we don't need any extra problems.

You can even bend a small-diameter pipe manually using a reinforced shoulder

The pipe is heated evenly, that is, from all sides, focusing on the outside. It is on it that the most serious deformations will take place.

The heated pipe may only be bent with heat-resistant gloves. Otherwise you can burn yourself. And in general, if you are going to act according to the instructions given, then it is advisable to take care of personal safety, put on equipment, etc.

Working with plastic pipes

Plastic is easier to bend, this is quite obvious. It is much softer, in many cases more plastic, and weighs lighter. However, plastic has one unpleasant characteristic: it has tensile strength. That is, it can crack if the application of forces is excessive. This must be taken into account.

Remember that a crack in a pipe is not necessarily a huge hole that you can stick your finger in. Just the formation of such a crack in the pipe is a great blessing, because it is easy to notice.

Problems appear when microcracks or even rudiments of cracks form in plastic. They are invisible and will wait in the wings to then declare themselves at the most inopportune moment.

Differences between pipes made of different types of plastic

The easiest way is to work with metal-plastic. This material is a combination of an aluminum rod and a plastic alloy, it is very strong, but at the same time ductile.

The process of its bending is practically no different from that when interacting with steel samples. Moreover, the pipe, if it is small in diameter, does not even need to be heated. You can just bend it with your hands. But again, you need to take care of the presence of a stabilizer in its cavity so that the deformation is successful.

Not only sand can be used as a stabilizer. Wire or even high strength steel spring works well.

Polypropylene can also be bent, but you have to be very careful here. Manufacturers of polypropylene pipes do not recommend bending them yourself. If it is nevertheless necessary, then make sure you have a construction hair dryer.

They can warm up the walls of the pipe, and then bend it on a pre-prepared workpiece. Position the pipe so that the thick wall is on the outside of the bend. Then the chance of damage to the segment is significantly reduced.

Thin plastic pipes seem to be the easiest to bend. But they break down with physical impact. Here you need to apply the trick and all the same heat treatment.

With a construction hairdryer, we heat the pipe to a temperature of 200 degrees, and then we begin to bend it easily and smoothly. In some cases, the plastic will become so soft that it will bend itself. Then just lay it down as you need it, and then try to fix it.

Source: http://trubypro.ru/kak-razrezat/sognut-bez-trubogiba.html

How to bend pipes without a special tool - 4 easy ways

Surely, many home craftsmen have repeatedly faced the question: how to bend small-diameter pipes along a certain radius to give them the required rounded configuration. On an industrial scale, special equipment is used for these purposes, but in this case the question is different: how to bend a pipe without a pipe bender at home?

Bent elements from a shaped pipe

Self-bending pipes

In order to help the reader deal with this issue, this article will consider several ways to bend round and rectangular pipes made of various materials. These skills will also come in handy when building a panel house.

Also, detailed instructions will be presented here, which describe step by step all stages of this operation using a set of ordinary household locksmith tools.

Locksmith vice equipped with a pipe bender

Method 1: bending steel pipes

Steel itself is a fairly tough material, but when heated to a high temperature, it becomes more ductile, which makes it possible to give steel products almost any desired shape. In order to bend an arc or a circle from a steel round pipe with your own hands, in addition to the usual locksmith tool, you will also need a gas burner.

1. Clamp the steel pipe in a vice... In order not to crush the walls, you need to first insert a metal bar of a suitable diameter into the clamping area.
2. Using a gas burner, heat up the section of the future bend until the characteristic color of the metal appears bright red.
3. With short, gentle hammer blows give the heated part the required configuration, controlling the bending radius according to a pre-made template.

After cooling, the finished part will retain its shape, and the metal will regain its previous rigidity and high mechanical strength.

Before heating a ferrous metal pipe, it must be heated red-hot

Note! The described method cannot be used for bending galvanized steel pipes, since zinc will burn out when heated to a high temperature, as a result of which its anti-corrosion properties will disappear.

Method 2: bending non-ferrous pipes

Non-ferrous metals, such as copper or aluminum, have high ductility, however, due to insufficient strength, the opposite walls of the pipe can not withstand multidirectional loads (compression and tension), as a result of which they break or crush.

In order to evenly distribute local internal stresses of the material, a simple technology is used for bending thin-walled pipes made of non-ferrous metals.

1. Before bending the aluminum pipe, you need to find a suitable steel spring. Its diameter should correspond to the inner diameter of the pipe, and its length was not shorter than the length of the bent section.
2. Having tied a strong long wire to the spring, insert it inside the pipe, placing it approximately in the center of the intended arc.
3. Carefully clamp the part in a vicewithout exerting great effort, so as not to crush thin walls of soft material.
4. Heat up the place of the future fold with a gas burner to the temperature at which the paper begins to smolder.
5. Bend the heated part along the required radiuswith a gloved hand on the free end of the pipe.
6. Remove the spring from the inner lumen of the pipe after the part has cooled, using the left end of the wire.

Spring for bending thin-walled pipes made of soft materials

Please note: Non-ferrous metals have high thermal conductivity, therefore, when working with a heated part, be careful not to get burned.

Method 3: bending metal-plastic pipes

There is a special tool for working with a metal-plastic plumbing, but its price is not worth buying a plumbing pipe bender for a home collection of tools. Reinforced-plastic pipes are quite plastic, so they can be given any necessary configuration. You can bend a metal-plastic pipe with a large radius with your hands, performing short, smooth movements and gradually giving it the required shape and bending angle.

A more sophisticated yet powerful method can be used to create a small radius arc or a 180 ° turn.

1. Cut into thin copper wires in such an amount that they can completely fill the inner lumen of the metal-plastic pipe.
2. Paste them inside so that they completely fill the pipe at the bend and at the same time all their ends remain outside the pipe end.
3. Give the future part the necessary shape, applying a sufficiently large force with your hands, then remove all the wires one by one from the inner lumen of the pipe.

The photo shows the simplest manual pipe bender

Please note: It is recommended to use copper wires without PVC insulation as a filler, because it can jam and make it difficult to remove them after work.

Method 4: bending the profile metal roll

Many have thought about how to bend a profile pipe. Plastic deformation of steel and aluminum shaped pipes is complicated by the presence of lateral edges, which are stiffening ribs, and therefore require additional efforts during operation. In order to maintain the correct profile of the final product, and to prevent kinks and breaks in the metal, the inner cavity must be filled with dense moving material.

Gas burner with portable cylinder

Bending of shaped pipes:

1. Prepare two plugs to cut the pipe... They can be made of wood, rubber or plastic, and should fit snugly into its inner lumen.
2. Insert a plug from one end of the pipe, then completely fill the entire internal volume with sand from the second end, and then insert the second plug into the other end.
3. In winter, you can use water instead of sand... After filling it, and installing the plugs, you need to take the part to the balcony until the water completely solidifies in the entire internal volume.
4. After that, you can start forming the arc. using a hammer or rubber mallet, clamping the part in a vice, or laying its edges on stable solid supports.

This method can also be useful for those home craftsmen who do not know how to bend a stainless steel or galvanized ferrous metal pipe.

It is convenient to clamp round parts in such a vice.

Conclusion

After reading this article, it becomes clear that there are many ways that can help a home craftsman to make a plumbing piece or a figured product from metal pipes at home, even without special equipment.

When carrying out construction work, a bent shaped tube is increasingly used. The design and manufacturing methods of these materials endow them with excellent characteristics.

Therefore, many are interested in how to bend a profile pipe at home. After all, such a need appears often.

It should be noted right away that the profile pipe-rolling products have a more aesthetic appearance than their round "brothers". And bending can be done:

1. In a specialized workshop.
2. Independently, at home.

If the preference is given to the second option, then you should know that for these actions you will have to have certain knowledge. Watch the video on our website and you will succeed.

Features of profile assortment bending

The fact is that when the configuration is changed, two forces affect the professional pipe:

• compression that affects from the inside;
• tension acting from the outside.

When the professional pipe is not bent, it changes its shape and loses the coaxial position of some sections. Also, a stretching wall may simply not withstand mechanical stress and become unusable. In addition to these problems, improper cutting and wrinkling may occur on the inner wall of the folded blank.


It often happens that it is easy to bend a pipe from a profile along a radius, but the workpiece is crumpled. After that, it is already suitable only for scrap.

The combination of these factors affects an unjustified increase in costs, which a serious owner will never allow. Therefore, despite the fact that this pipe assortment is quite flexible, you should not rush to process it, and before you bend the professional pipe along a radius at home, it is important to study the technology in detail. This will be discussed further.

Technology should not be neglected. Only for a master armed with knowledge, the question of how to bend a profile at home will not create big problems. All recommendations on how to bend the profile metal roll correctly were given by professional craftsmen who have studied this problem in practice for a long time.

Influence of material specifications on the choice of bending method

First, you need to know that the concept of "professional pipe" includes an assortment of any geometric configuration. But, to make it easier to understand, it is customary to call the profile assortment of the following form:

• square;
• rectangular;
• oval, etc.

This is due to the fact that round views are placed in the design of a pipeline for supplying liquid or gas, where significant pressure is provided. A profile of a different shape is found in various household structures and facilities.

Square rolled metal products are distinguished by the section index and the dimensions of the walls. These both factors indicate the minimum angle for bending the rolled metal, at which it will not become unusable.

There are a lot of engineering nuances in the question of how to bend a product without a pipe bender. But you don't need to know all of them to work at home. But it is important to know the following.

1. Thin products with a cross-section of up to 20 mm without a pipe bender must be bent in an area that is 2.5 times longer than the height of the pipe itself.
2. Thick rolled metal can be bent without a pipe bender in an area that is three times longer than the section. If this moment is ignored, then the metal cracks from the outside or deforms from the inside.
3. The bending of a profile pipe is dangerous in one respect: the occurrence of a fracture at the place of operation, as a result of which the part is sent for final scrap or for alteration for products of a smaller size.
4. The limiting condition is the following ratio - the minimum radius should not be less than two and a half dimensions along the bend section. For example, for a profile with a thickness of 40 mm, the minimum inner radius will be 40 x 2.5 \u003d 100 mm.

Before bending a steel profile pipe at home, one more rule should be remembered.

After impact, the pipe strives to return to its original shape. For this reason, if you bend yourself, without a profile bending, it is better to bend a little more than necessary according to the scheme. If you bend the workpiece a little more, then in the end the rounding will turn out as the diagram requires.

All these conventions must be taken into account before bending this or that rolled metal product, otherwise it is useless to rely on a high-quality end result.

Methods used for bending

Do-it-yourself bending of a profile pipe at home is done in the following ways:

• Bending by means of special technical devices. They are popularly called pipe benders.
• Using various available means.
• Applying physical strength. But, this is only relevant for small diameters.

If you make a bend at home, then you need to consider:

• The amount of bend.
• Manufacturing materials.
• The value of the wall thickness.
• Section.

IMPORTANT! Measures for the deformation of profiled tube-rolling products are performed in permissible norms set for the section and wall thickness. When working, it is necessary to control that the cross section does not flatten and does not cause internal kinks.

See how to bend pipes and common mistakes, and below is a video of the process.

How to bend a mandrel

In home workshops, rolled metal with a wall thickness of no more than 3 mm can be bent by means of a mandrel. The best option for solving the problem, if you need to bend a professional pipe by 20 with your own hands, is a roll forming machine, on the top of which there is enough space for finishing equipment. Such devices perfectly cope with products with a diameter of 40 mm.

When changing the shape of the assortment by 20 and 40 mm, the optimal space is chosen on the workbench for installing the element for fixing. To facilitate the work on one side of the machine, there are holes that are located close to each other.

The problem of how to bend a profile pipe at home without a pipe bender on a mandrel is not difficult to solve. The required radius during deformation is obtained by installing a special template. Thick plywood is used for its manufacture. But, if work on the bending of profile pipes is required to be done often, then you can make a template from a metal corner.

Flexion using internal resistance

There are many different ways to bend a pipe without a pipe bender around a radius at home. Here are some of them.

These methods relate to work using improvised means.

Any greenhouse, gazebo, and other home extension cannot do without the use of a bent professional pipe. And practice shows that the question of how to bend a profile pipe roll does not create any difficulties.

The most important thing during deformation of a professional pipe without a special manual device at home is the safety of the pipe product itself. And home craftsmen solve the problem of how to bend a profile in the following ways:

• grinder or welding finish;
• use of a spring;
• filling of rolled metal with sand;
• bend with water.

Each method, how to bend a professional pipe yourself without a pipe bender, which a home craftsman can use, has its own advantages and disadvantages. You need to familiarize yourself with them in order to stop at the most optimal option for your conditions.
Watch the video

Bending without a pipe bender - cutting with a grinder and welding

In such devices, manual drives are used, but if you develop the design further, it may well be the starting point for developing your own business.

When doing flexible profiles at home, you need to consider a number of circumstances:

• when purchasing a profile, make sure that they are all the same size and steel grade and belong to the same delivery batch;
• when using welded profiles, orient the side with the seam to the inner radius, otherwise it may break;
• when working with a grinder, do not forget to use protective equipment in the form of glasses or a mask;
• it should be borne in mind that the end sections cannot always be bent to the required size, therefore, when calculating the length of the workpiece, you need to take into account their length and cut off such pieces at the end of the formation of the part;
• after installing the products in place, it is necessary to carry out anti-corrosion treatment of the metal and then carry it out regularly.

Bending services

Such a service could not but become a separate line of business development, since it involves the use of rather complex technological equipment in an industrial version.

Video - how to bend a profile pipe

Profile pipe bending services are also present on the market and involve the execution of both radius bending and arched bending. The separation occurs this way because specific equipment is used for each of these operations. In the first case, it is a pipe bender, in the second, three-roll rolling.

It must be admitted that the price indicators for performing such operations are very acceptable, as follows:

• the cost of one corner fold is 30 rubles;
• one running meter of the arch span will also cost 30 rubles.

In comparison with the cost of metal and delivery of material in the Moscow region, this is really practically nothing.

Special devices for bending

Bending machines for such a process use specially designed products for a certain type of product. You can buy a bending machine, or you can do it yourself at home.

Making a bending machine with your own hands

To create a bending machine, the manual view of the device becomes the best option. The structure of the structure depends on the diameters with which to interact.

For pipe-rolling materials with a diameter of up to 20 mm, a simple device can be made consisting of steel pins placed in a concrete slab. The pipe inserted between the pins is bent to the required dimensions.

But, when the diameter exceeds 20 mm, then for the structure it is necessary to develop more complex drawings of a bending machine for a profile pipe.

A pair of rollers with a round lateral section on the edges are fixed to a stable strong base. The radius of this edge of the roller must match the diameter of the pipe-rolling product that needs to be bent.

The workpiece is inserted between the rollers and its end is fixed. The other end is attached to a winch and driven. When the angle on the pipe reaches the required parameter, the winch is stopped.

ADVICE. The network provides many drawings of pipe benders prepared by the masters. The main thing to pay attention to is whether the diagram contains all the exact dimensions. Otherwise, the work of the bending machine may not be of good quality.

Watch the video

The whole process of creating a pipe bender with your own hands must be divided into the following stages.

1. Making shafts and fixing gears and bearings to them. The gears are fixed through a key. Bearings are advised to be purchased complete with supports.
2. The gears and chain are suitable for any machine. Parts from foreign cars are of higher quality.
3. Using a welding machine, the base is welded, and the clamping shaft is screwed to it.
4. Next, the spring nuts and the platform for them are welded.
5. Fasten the support shafts at the bottom.
6. The tension chain is being constructed.
7. At the final stage, a handle is attached to the shaft. To him (to make it easier to bend) it is advised to use a handle that rotates.

Such a device quickly deforms by passing a tubular product through it.

The creation of such a bending machine is very inexpensive. And such a device will come in handy in a private house very often, and in some cases it turns out to be simply irreplaceable.

These are the simplest pipe benders, after watching video materials and studying the drawings, you can learn how to bend correctly and choose the best design option.

With such a slave, how to make a bending machine is not difficult to cope with, but it will save you money. This savings can be about 20-30 thousand rubles.