Do-it-yourself manual pipe bending machine. Bending machine for a profile pipe: when straight lines are not enough How to make a pipe bender for a profile pipe yourself

The need to bend profile pipes in household occurs quite often, whether it is the preparation of blanks for construction metal frame greenhouses or canopies or the manufacture of pipeline parts of complex configuration. For this, industrial-made devices are often used, however, purchased products are not a cheap pleasure. It is much more profitable to make a pipe bender with your own hands, especially since no scarce parts are required to manufacture the unit, and its design is available for repetition in any garage. Homemade fixture will allow you to get a pipe with the desired radius of curvature and at the same time avoid deformations and creases on its surface.

Purpose and types

The pipe bender is an indispensable device when you need to delicately and accurately bend a round or shaped metal pipe.

The bending of metal profile pipes is directly related to their diameter, wall thickness and material of manufacture, therefore, metal-roll manufacturers always indicate the minimum deformation radius in special tables.

Table for calculating the bending radii of steel pipes depending on the diameter and wall thickness

It is not easy to bend a hollow pipe without creases and deformations. At home, for this, it is filled with sand, heated to redness with a gas burner or blowtorch, and then bent “by eye”. Of course, this method, with high labor intensity, is not ideal due to low quality and low accuracy.

To obtain a bend of the required curvature and not damage the part, special devices - pipe benders - allow. Depending on the length of the fragment to be bent, two types of devices are used:

• lever pipe benders;
• rental units.

The most common products are lever-type pipe benders. In such devices, the force is applied in the right place, and the bend itself repeats the shape of the segment (template), which in some devices can be removable. As a rule, the package of such units includes several segments for pipes of various diameters. In addition to segment devices, the industry produces mandrel and crossbow pipe benders, the bending shape in which is set by two guide rollers and a pressure template (mandrel). This design allows cold working of round steel pipes in short sections. By the way, compact crossbow pipe benders are the most popular tool among utility installers.

Simple, fast and high quality - these are the advantages of crossbow pipe benders that attract professional installers

Depending on the design of the lever bending device, it can have any type of drive:

• hydraulic;
• pneumatic;
• electric.

Often the principle of operation of the unit provides for heating the pipe (external, or with the help of heated air passed inside the rolled product), which increases its plasticity, and, accordingly, the quality of the curved section.

If it is necessary to obtain a bend of a large radius, rolling fixtures are used. Their design includes two guides and one pressing shafts (rollers). The pipe is pulled between the moving elements, setting the degree of bending by the force of the pressure roller. If it is necessary to obtain a large radius of curvature of the workpiece, the procedure is repeated.

The rolling fixtures can have an electrical transmission for the guide shafts, as well as a hydraulic, mechanical or pneumatic drive of the pressure roller.

Designs of homemade devices

The simplest option available to most novice craftsmen is to bend pipes according to a pre-made template. A similar method is used when it is necessary to obtain a large number of the same type of blanks.

Bending a pipe on a wooden template is the easiest way to solve the problem

As a template, you can use a structure made of wooden boards. The thickness of the wood is chosen based on the diameter of the pipes to be bent - the board should have a margin of 2–3 cm. So that the metal profile does not slide off the template during operation, the ends are processed with a slight slope.

The structure is fixed to the floor or other surface in any way, mounting a stop for the pipe nearby. Having inserted the profile into the gap between the template and the thrust element, gently and gently press on its other end, pressing the pipe against the template. In order to lighten the pressing force, you can use a suitable size lever or adjust the winch.

The winch can facilitate the process of bending pipes using a template

In a similar way, a metal profile of small diameter can be bent. If it is required to change the configuration of the pipe by more than 1 inch, then the template is equipped with pieces of powerful reinforcement. To do this, holes are made in the concrete slab along the required trajectory, into which guides are inserted in the form of pins from pipe sections, fittings, etc. Bending is performed by fixing the edge of the metal profile by welding.

The advantage of this method is its cheapness and simplicity, however, the accuracy of the obtained blanks and the quality of their processing leave much to be desired. In addition, the template will have to be made every time you need to get a bend of a different radius.

Factory-made snail pipe bender

For the manufacture of a large number of the same type of workpieces with a small radius of curvature, you can use a snail pipe bender. This unit consists of two pulleys (wheels) different diameter mounted on shafts. Having fixed the end of the pipe on the impeller, a smaller-diameter roller (driving wheel) is pressed against the workpiece, while rolling it along the workpiece. As a result, the pipe goes around the surface of a large pulley, repeating its shape. The only drawback of this method is the impossibility of obtaining roundings of large radius.

The most versatile and practical are home-made rolling pipe benders (bending machines), in which you can set any angle of deformation of rolled metal. The simplest design rolling unit is a base with drive shafts fixed at a certain distance from each other. The pressure on the pipe is carried out by a movable roller, and its broach is carried out due to the rotation of the drive shafts. As a power drive of such devices, screw devices, jacks, winches and electric motors are used. The rolling machine is the most difficult to replicate at home, as it requires turning and welding. However, there are many variations of its design made by amateurs, which indicates the high popularity of this solution. With the help of such a device, a bend of any configuration is obtained, and the process itself is often automated. The only thing such a device cannot cope with is obtaining the minimum radius of curvature of the metal profile in a small segment.

Video: Homemade rolling type bending machine

We make a pipe bender with our own hands

For the manufacture of a pipe bender, you can use the drawings finished structures. After looking at several options and commensurate the complexity of the units with their capabilities and the availability of the necessary parts and materials, you can choose the most optimal scheme. For your judgment, we present two models of pipe benders for self assembly- a manual unit for small pipes and a semi-automatic type bending machine.

Manual volute bender for small radii

To correctly bend a profile pipe, you need to understand the physics of the process well. In manual pipe benders, the circular bending method is most often used, which avoids the risks associated with creases, cracks and other damage to pipes. To bend rolled metal in such a unit, it is enough to fix the workpiece in the fixture and press the lever. Bending occurs when a roller is rolled through the pipe, pressing the part against the main wheel.

Materials and tools

To make a manual pipe bender you will need:

• metal sheet with a thickness of at least 6 mm;
• Working wheel;
• pressure roller
• steel corners 50x50x2.5 mm;
• piece of thick-walled pipe Ø25 mm;
• axis of rotation (sleeve or bearing assembly);
• piece of square bar 20x20x40 mm;
• nuts and washers;
• angle grinder;
• welding machine;
• hammer;
• measuring tool.

In the process of work, do not forget about safety precautions. This is especially true when working with cutting and welding equipment.

Calculation of a pipe bender and drawing up a drawing

Before starting work, it is necessary to decide which bending radius of the profile pipes will be most in demand. Depending on this, the size of the impeller is selected. It is this value that will correspond to the inner radius of the resulting knee.

Pipe bender-snail assembly

The drawing is designed for profile pipes with a diameter of up to 1 inch. The bending radius that can be obtained with this pipe bender is 125 mm (half the diameter of the impeller). If you need a bending unit with other parameters, use the method for calculating the dimensions of the pipe bender.

The main dimension of the pipe bender fork is the distance between the axes of the impeller and the roller (indicated by the letter a=200mm). In our case, the center gap is selected taking into account the maximum size of the machined profile pipe d \u003d 25 mm, however, it is advisable to add a couple of millimeters “in reserve” to this value.

The center distance can be determined by the formula a = d + r1 + r2 + 2, where d is the diameter of the profile pipe, and r1, r2 are the radii of the impeller and roller, respectively.

If a roller and a wheel with a groove (a kind of brook pulley) are installed in the design of the bending device, then the measurement is carried out starting from the bottom point of this part.

Fork pipe bender-snail

To determine the size of the fork, the gap between the roller and its base is assumed to be 10 mm, and a 30 mm margin is added to fasten the impeller axle.

Fork length c = a + r1 + 10 + 30 (mm).

To determine the internal clearance between the side legs of the fork (b), add 1 to 2 mm to the wheel thickness.

You can make the pipe bender more versatile by drilling several holes in the side surfaces of the fork. By rearranging the roller axis, the distance between the working surfaces of the rotating parts is changed.

Step-by-step instructions for making a manual pipe bender

According to the drawing of a manual bending unit, it can be seen that it consists of several main parts:

• base in the form of a thick metal plate;
• Working wheel;
• video clip;
• fork.

Our instructions will help you perform the work consistently, avoiding mistakes and inaccuracies.

1. Make the impeller and roller. Of course, it would be a huge plus to have lathe in your workshop, but even if you do not have such equipment, these details are not a problem. Any turner will be able to carve pulleys at a very reasonable cost.
   In the manufacture of moving parts, you should not save. Be sure to make a groove in them for a pipe of maximum diameter, and also carve a nest in the roller for any suitable rolling bearing. If there is a need to change the configuration of the knee surface, the trough of the impeller or roller is made curly. When rolling, the roller will leave the required imprint on the outer surface of the knee, and the wheel on the inside. To facilitate the task of the turner and further reduce the cost of the device, instead of a roller, you can install a pair of ball bearings of a suitable size.

   Pipe bender impellers can be made with a chute of any configuration

   The image clearly shows the ball bearings installed instead of the roller.

2. On the same machine, it is necessary to make axles for the impeller and roller. The thickness of the parts is taken equal to the inner diameter of the selected bearing. The length of the axle for the roller is equal to the width of the fork in terms of the outer dimensions. The axis of rotation of the impeller will be slightly longer, since the thickness of the base plate of the bender will also have to be taken into account. By refusing to mount bearings, the design can be greatly simplified. In this case, long bolts with nuts can be used as axles. However, it should be understood that it will be more difficult to bend pipes with this device.

   For the manufacture of a fork, you need metal with a thickness of at least 6 mm

3. The side surfaces and the back wall (base) of the fork are cut out of sheet metal, as well as a piece of thick-walled pipe as a lever.
4. According to the drawings, holes are drilled in the fork for the wheel and roller axles.
5. Weld the fork parts. Particular attention should be paid to all right angles of this structural element.
   

   Attaching the lever to the fork end-to-end will be unreliable due to the large applied force. It is best to make a hole in its back wall, into which the edge of the pipe will enter. Having scalded this joint by welding, the most durable joint is obtained.

6. Using a grinder, the base (frame) of the device is cut out and a hole is drilled in it for the stationary axis of the impeller.
7. If necessary, a bearing is pressed into the roller.
8. The roller is inserted into the fork, after which it is fixed by welding or nuts.

   Fork pipe bender-snail assembly

9. The fork assembly is installed on the base, fixing the impeller axle in the same way as when mounting the roller.
10. A piece of square section is welded as a clamp of the processed pipe.

Holes are drilled in the corners of the base of the pipe bender for attaching the fixture to the workbench. In order for the device to be not only functional, but also aesthetic, in the process of work, the places of welding joints must be cleaned and the sharp edges of the workpieces are treated with a roughing wheel. In order to protect against rust, the finished product is painted with enamel.

Bending machine for profile pipes

Bending long shaped pipes requires not only effort to deform them, but also a mechanism for pulling parts to the desired distance. Often, in the design of home-made bending machines, not a screw is used, but a jack or winch, and the drive includes an electric motor.

Drawings of homemade devices

Bending machine. Side view Tube bender with top roller drive Tube bender with adjustable roller spacing
The simplest broaching type pipe bender

In the bending machines shown in the drawings, a threaded gear is used to press the roller. In our design, we will use a hydraulic jack, as well as a manual drive using parts from the gas distribution mechanism of automobile internal combustion engines.

Tools and materials

In order to get started, prepare the following parts and materials:

• corners for the machine bed;
• round or shaped pipes for the frame;
• working and broaching shafts (rollers);
• jack;
• springs;
• chain transmission;
• tensioner;
• bearing supports assembled with bearings;
• pen;
• channel for fastening;
• bolts and nuts.

In work, you will need manual and electric metalwork tools:

• angle grinder (grinder);
• welding machine;
• electric drill and a set of drills for metal;
• hammer;
• set of wrenches;
• measuring tool.

Do not neglect personal safety equipment. When working with a grinder, be sure to use a protective shield or goggles, and carry out welding processes in tight overalls and special gloves. It should be remembered that it is forbidden to work without a welding mask and carry out electrical work on a wet surface and in the rain.

Instructions for making a bending machine

Dividing the pipe bender manufacturing process into several stages will help to organize the work more clearly.

1. Make broaching (support, drive) and pressure (working) shafts. In the absence of skills in working with a lathe, you will have to contact a specialist. Be sure to remind the turner to turn the rollers with shanks to install the sprockets. It is best if you take these items with you.

   The design of the working shafts should provide for the possibility of installing drive sprockets

   Any sprockets and chain can be used. For example, from the gas distribution mechanism of passenger car engines.

2. Mount the bearings on the shafts and install the drive gears on the keys.

   In the design of the machine, you can use drive sprockets and bearing supports from automotive equipment

3. Make a bending machine frame using a welding machine. To do this, first make a square frame with support legs, and then mount a structure on it, along which the plate with the pressure roller will move.

   Making a bending machine bed

4. A steel U or H-shaped channel is used as a plate. To mount the pressure shaft, holes are drilled along the edges of the plate according to the connecting dimensions of the bearing supports.

   Fabrication of a frame for the installation of a base plate

5. A section of the channel with a roller is suspended from the upper part of the frame on four springs, for which nuts are welded at the corners of the plate and frame as mounting loops. After that, a hydraulic jack is mounted.

   

In the article we will try to figure out why profile pipes are needed; why bend them; what equipment is needed for this and is it possible to make a bending machine for a profile pipe with your own hands.

Why profile pipes are needed

The great advantages of square and rectangular pipes as elements of load-bearing structures have already been repeatedly covered in articles, so we will focus only on the main points:

• With transverse loads, it is much stronger than round ones;
• equally strong with respect to loads directed perpendicular to any of the pipe faces;
• are used where the vector of application of the greatest effort is precisely known. The pipe is mounted so that the load is parallel to its wide surface.

The profile pipe is practically not used for transporting liquids and gases, its destiny is all kinds of supporting structures and frames of furniture, greenhouses and other structures, which should combine, if possible, lightness and strength.

Tip: for a greenhouse, to be honest, profile pipes are better only for a slightly simpler installation.

The flat surface of a rectangular pipe is easily screwed to the same plane. From the point of view of strength, the usual water pipe three quarters of an inch in diameter.

Arcs, arches and circles

In some cases, not simple rectangular structures made of a profile pipe are preferable, but various roundings and arches. Their application is practiced in several areas:

Construction of buildings of complex shape based on metal structures

This is primarily a variety of exhibition pavilions, sports facilities and hypermarkets.

Complex shapes of structures with an abundance of roundings have two functions:

• Aesthetics. A simple rectangular box is easy to assemble, but does not attract attention and certainly does not please the eye.
• Maximum streamlining of the roof of the building for precipitation and winds. The large roof area means, among other things, that tens of tons of snow can accumulate on it.
  The consequences of this are usually the most unpleasant. In order for the snow to safely roll off the roof, it can simply be made domed.

Canopies and cornices

The reasons for making them rounded are exactly the same: to impress the consumer and not get complaints from him when the structure is blown away by a gust of wind or crushed by accumulated snow.

Greenhouses and greenhouses

You understand that the aesthetic component completely fades into the background. But practical motives become all the more important because the main roofing material here is a thin and fragile film.

If the greenhouse is not streamlined, the first strong gust of wind will send it on a seasonal migration to Africa. About snow and rain, I think, no need to explain ...

In the afternoon we will bend, in the evening we will disperse

The profile pipe is appreciated for being durable. If so, you can’t bend her knee into a neat arc.

We need a high tech solution.

1. The first high-tech solution in the best national traditions can be any source of high-temperature flame: a propane cutter, an acetylene torch or just a blowtorch. We warm up one section and, using any lever, bend at a slight angle. Then we move on. Difficult, requires a lot of effort and very sloppy. But it works.
2. The second high-tech solution could suddenly become a special machine for bending a profile pipe..
   In essence, it is a fairly simple construction, which we will analyze further by cogs.

Machine tools simple and complex

The simplest pipe bender for a profile pipe consists of three rollers on strong bearings, a strong frame and two handles. One sets the pipe in motion, pulling it along two pipe bender rollers, while the second handle presses the pipe with the remaining roller using the simplest clamp mechanism, deforming it. The pipe is pulled through the pipe bender, turning into a neat arch with the desired radius.

With large volumes of production, pipe benders with electric drive. Thanks to a gearbox with a large transmission ratio, an overly powerful electric motor is not needed: the typical power of such devices ranges from half a kilowatt to one and a half.

In the most advanced devices, two independent electric motors for pulling and deformation of the pipe and several sets of rollers are installed, which allows you to bend pipes of various profiles without the risk of leaving any marks on their surface.

From machines with manual drive Of course, don't expect too much. Profile pipes for metal structures suitable as the basis of an indoor stadium, they are not bent. However, for example, a collapsible greenhouse that can withstand strong wind and heavy rainfall, you can provide for yourself. Suitable the simplest machine and for in-line production of various arched canopies and canopies to order.

crazy hands

If you have materials, tools, free time and a pair of properly sharpened upper limbs, you can not look for a bending machine for a profile pipe in stores, but make it yourself.

For example, in this, without irony, masterpiece of handicraft work, we see a very original use of a conventional car jack. It rests against the upper part of the welded frame and, when the handle is rotated, presses the tool steel roller into the pipe, deforming it. The pipe pulling function is assigned to a fairly powerful electric motor with a worm gear.

If there is no electric motor at hand or you just don’t want to mess with the electric drive, you can literally pile even more frightening, but no less effective designs literally on your knee.

Here the entire structure is welded (judging by the state of the steel, welded long ago) on a piece of thick I-beam. Broach - with a handle with a simple chain mechanism, deformation - with a home-made primitive clamp. And everything works great.

Tip: if you don’t have the remains of several machines in your shed or garage, it will often not only be faster, but also more profitable to buy a ready-made pipe bender.

Prices for the simplest mechanisms start at several thousand rubles.

Conclusion

To be honest, cases when it is really necessary to do the bending of profile pipes yourself are rather an exception for a city dweller. If you have your own large farm in the countryside or you are going to start your own business in construction - well, good luck in choosing a tool!

Profile pipes have firmly entered human life, thanks to their inherent properties: increased strength, the presence of stiffeners and convenient geometry. Due to the wide use of products, it often becomes necessary to bend such pipes in one or more places and at different angles, for which purpose profile pipe bending equipment is used. About the types of pipe benders, working with them and self-manufacturing devices will be discussed in this article.

Types of pipe benders

As mentioned above, often - both in the household and on an industrial scale - it becomes necessary to change a round or shaped pipe, bending it to the required angle in one or more places, or giving it a smooth bend radius. This is required both for the technological conditions of operation of pipes, and for aesthetic ones (for example, when creating patterned structures and elements - for peaks, canopies, etc.).

In most cases, it is either physically impossible to bend the pipe manually, or it is possible with significant violations of the profile geometry, which complicates further use products.

Therefore, they use professional or do-it-yourself machines for bending a profile pipe - pipe benders.

According to the principle of interaction with the corresponding products, pipe benders are divided into:

1. Hydraulic lever devices, bending products at a given angle. In this case, all the effort is concentrated by means of a lever at one point - the place of the bend.
2. Roller attachments(profile benders), which provide the ability to give the profile pipe smooth bending radii. When using this tool, the product is flared (rolled out) by means of rollers.

It should be further noted that, whether purchased or made by oneself, machines for rolling profile pipes can only work with ductile non-brittle material, that is, with metals and alloys (read: ""). For bending hard plastics, asbestos cement, etc. they are not suitable. And soft plastic bends by hand and effortlessly.

By appointment, pipe benders are:

• for profile products - pipes with a section geometry other than round (oval, rectangular, square);
• for copper pipes and products from other metals and alloys (read also: "");
• for metal-plastic pipes, etc.

Working with the device

Usage quality tool provides bending of the pipe in compliance with the requirements for the quality of the products obtained.

The correct use of the machine for bending the profile pipe ensures uniform bending of the product, eliminates the occurrence of creases and flattening during the processing of the pipe.

Giving the pipes a curved shape, in turn, provides the most favorable arrangement of pipelines and other structures, without using extra space. In addition, in some cases, by correctly bending some elements, you can avoid the use of welding and various pipe fittings (couplings, flanges, angles, tees, etc.).

Equipment selection

Now there are a sufficient number of pipe benders of various manufacturers, destinations and price categories on the market, which allows each master to choose essential tool, guided by the intended area of ​​​​use and the availability Money.

Depending on the planned purpose of the device, you should purchase:

• manual pipe benders for metal and metal-plastic- they are suitable for bending pipes made of different brands steel, cast iron and, of course, composite products;
• profile benders- as the name implies, they are used to give the necessary shapes to profile pipes, which are usually made of steel;
• manual pipe benders for copper pipes- have the least bending power, since copper is the most ductile.

If we list the most popular pipe bending devices in Russia, we should note such popular brands of manual roll forming machines as PG-1, PG-2 and PG-4. All of them are domestically produced and, according to the statements of the people who used them, are not inferior to imported counterparts.

Making a device for bending pipes with your own hands

In addition to purchasing the product, there are other options: borrow a professional pipe bender from friends or rent it. In addition, guided by the relevant drawings for the machine for bending the profile pipe, you can try to assemble the tool yourself.

Among the advantages of a do-it-yourself machine for bending a profile pipe are:

• the ability to control the entire manufacturing process, from the stage of selection of materials to the final coloring, which means that the owner homemade machine can be sure of its reliability and safety;
• saving money - many parts for assembling the device or already in the arsenal home master, or you can profitably purchase, for example, at scrap metal collection points. See also: "".

To assemble the machine, you will need the following parts and elements:

• corners and channels to create a frame on which the main mechanism will be fixed;
• supports for the machine - any options are possible: legs made of round and shaped pipes, corners, etc.;
• bending rollers (shafts), which can be made to order by a turner;
• transmission chains and gears to create torque on the rollers (you can, for example, use the components of an old domestic car - a “six” or another);
• chain tensioner (can also be removed from the machine);
• guides for rollers - in order to get them, a couple of corners are welded;
• the driving component for the guide rollers - can be made of a profile pipe with parameters of 40 by 20 mm;
• adjusting screw;
• lever for actuating the device - it can be made from any metal part;
• bolts for fixing the bending rollers - under them it is necessary to make slots in the channels, allowing you to adjust the pipe bending parameter by changing the rollers.

Thus, having all the necessary items and the desire to work with your hands, you can assemble your own pipe bender without any problems.

In the household, a profile pipe bending machine is not used so often as to buy expensive factory-made equipment.

If such a need arises, a simple pipe bender can be made privately, having previously decided which type of this design is suitable for the task.

This article details the types of pipe bending machines, describes the principles of their operation and methods of construction.

There are many equipment modifications to change the configuration of profile pipes. This is due to the minimum bend radius. If this important parameter is neglected, the strength characteristics of the material will change for the worse at the bending point. You also need to know some technological subtleties and take them into account during work.

When choosing a design, the workpiece material, diameter, wall thickness are taken into account.

Classification of bending machines by drive type

Depending on the type of drive, machines designed for bending any pipes are manual, electromechanical and hydraulic.

Manual. These are extremely simple mechanisms, available for self-production even to a person who is not privy to the intricacies of working with metal.

Manual, do-it-yourself, machine for bending a profile pipe - indispensable assistant in the manufacture of frames decorative elements, self-assembly ventilation systems

Electromechanical. Such a machine has a drive in the form of an electric motor - stepping or conventional, connected through the lower gearbox. The latter solution provides high quality bending due to proper stress distribution.

The device of the mechanism is not easy to make, you need special knowledge and at least a little professionalism.

The electrically driven roll forming machine in most cases has the appearance of a 3-shaft structure. The profile pipe is passed between the rollers. An element located in the center can change its vertical coordinates. When the central shaft rotates, the profiled pipe changes its geometry

Hydraulic. The drive in this model is manual. Unlike a simple manual design, here a hydraulic cylinder is included in the circuit, which significantly reduces the muscular effort applied during bending.

Rollers make it possible to bend the profile pipe in any desired direction. A manual profile bender with hydraulics, with its low weight, can bend a pipe assortment up to 10 cm wide.

The hydraulic cylinder of the roll forming machine exerts pressure on the surface of the pipe by mechanical action. This causes the cylinder rod to move. As a result of the resulting load, the product is deformed. The pressure in the piston can be increased in two ways - manually and with the help of an electric pump.

Types of pipe benders by installation method

There is a division of profile benders and depending on the installation method. Distinguish between stationary, portable and wearable equipment. Stationary machines can look like a simple concrete slab with rods, or solid equipment.

The compact portable benders have a support stand, while the portable model does not have a support, which is picked up every time the equipment is used.

Classification of machine tools by bending method

The design of the profile bender and its performance will depend on the bending method. There are 3 main bending methods. The first is extrusion, when the geometry of the profile pipe is changed using a deforming roller that acts as a punch. There is no matrix in this case.

To perform the operation, 2 strong supports are required on opposite sides of the bend, which act as a matrix. Swivel shoes or rollers are used as such supports.

Since the force builds up gradually and is always perpendicular to the pipe, the method makes it possible to obtain a good end result. We apply the method only for work in a small amount.

The second is pressing. To obtain a bend, the principle of a bench vise is used - a pipe segment is placed between the matrix and the punch.

The profiles of the latter, in order to obtain a high-quality bend, must exactly repeat the geometry of the part. And also in the calculation it is necessary to take into account the residual deformation of the metal. At home, this method is applicable when high accuracy is not required.

The machine for changing the shape of a profile pipe by rolling consists of three cylindrical rollers, a chain, a drive and a base. The diameter of the rollers must correspond to the parameters of the deformable profile pipe

The third - rolling - a universal method used for bending both thin-walled and thick-walled pipes. The bend is obtained by pulling the workpiece between the rollers - one rotating and two supporting.

In addition to those mentioned above, pipe bending can also be carried out by the following methods:

Image gallery

Bending of a pipe is carried out by means of three rotating rollers. In this case, the bending radius determines their location in relation to each other.

When bending the pipe with a crossbow pipe bender, it rests against two rollers, and the template that is located on the rod of the device bends it between the supports

The principle of operation of this pipe bender is to bend the pipe in a cold state by rolling it with a roller around the bending block

For the manufacture of the base of the machine and racks, you will need a channel with a wall height of 150 to 200 mm in an amount of about 3 m. steel pipe with an inner diameter equal to the outer diameter of the bearings, which is divided into 6 short segments.

The turntable is not the only option for adjusting the bending parameters of the profile pipe; this can be done using the outer rollers. To do this, holes are made in the base plates and the channel so that the elements are movable. You can raise the extreme platform with any jack that is on the farm

From the channel, a base and two platforms are made. Stepping back from one of the sides about 0.5 m, a vertical stand is welded from the same channel. To do this, two segments are paired to make the stand strong.

Strictly observing horizontality, a stationary platform is mounted, and a rear rack is welded to it. Further, a section of a profile pipe is taken and limiters are increased with a height not less than the thickness of the profile pipe, the deformation of which is supposed to be performed on the machine being manufactured.

The guide platform is connected to the main frame by means of door hinges. On the extended limiters and the edges of both platforms, bearings are mounted by welding and the structure is reinforced with corners. The shafts are inserted into the bearings, and a handle is attached to the middle one.

A jack is installed under the edge of the guide platform and fixed to the base with a bolted connection.

The pipe bender with a turntable is assembled in the following sequence:

Image gallery

For the manufacture of a pipe bender, you will need the following materials: pipe, channel - 2.5m, bearings, jack, hinges, rollers

It is necessary to cut the channel into two parts - one of them will be the main platform, and the second - the guide. They are connected with metal loops.

The next step is to cut 6 pieces of pipe 2 cm wide and bend them to mount the bearings

Having cut the rollers of the required length, they must be connected to the bearings and the structure welded to the working platform

The central roller must be welded at a height of 8-9 cm above the platform. This is necessary so that a profile pipe can pass under it.

Using welding, we connect the working platform to the base and check the reliability of all connections

We offer to buy a pipe bender for a profile pipe at the best price. The equipment is designed for cold bending of blanks from profiled (square or rectangular) metal pipe. It is used in small and batch production in the manufacture of elements of awnings, roofs, gazebos, benches, railings, fences, and more. etc..

The order and purchase of a profile pipe bender must begin with the definition of a production task and specifications machine. The main factor is the cross section and the number of blanks that will need to be bent.

Design features

If a pipe bender for a round pipe has many design options, then the basis of a profile bender for a square or rectangular pipe is almost always three rollers, between which bending is carried out by rolling the workpiece. By adjusting the pressure of the second roller, you can set the required bend radius of the part.

According to the type of drive, the machines of this group are divided into two types:

• manual roller profile pipe benders, which have a low price and small size. The latter is convenient if mobility and compactness are required;
• electric profile pipe benders, have a higher price and power, but also higher performance.

When choosing equipment, it is necessary to pay attention to the following technical parameters:

• Maximum pipe profile, mm
• Pipe profile type: square, rectangular, round
• Bending radius, mm
• Bending diameter, mm
• Developed force, tons
• bending speed
• Choice of accessories
• Machine dimensions, mm
• Machine price

Cost and delivery of the machine

The company "Rustan" offers for sale machine tools for metal at a bargain price. When buying a flexible system of discounts!