Do-it-yourself machine for bending a profile pipe. Profile pipe bending: do-it-yourself pipe bending machine Step-by-step instructions for making a manual pipe bender

Despite the wide variety of metal products that are on the market, among them there are those that are most widely used. This should include greenhouses, sheds, gazebos, furniture sets. To create the above structures, you can use do-it-yourself shaped pipe bending machines.

Of course, when there is a need to give a particular pipe the necessary shape, you can use improvised means. But in this case, it is impossible to achieve a high quality of the finished product. In order for the part to have the most accurate geometric characteristics, a specialized machine must be used without fail.

Profile pipe bending technology

A characteristic feature of each metal product is a certain hardness and strength. In order to give a metal rod or profile pipe a certain configuration, it is necessary to make efforts, thanks to which the workpiece can take one or another geometric shape. Moreover, to effectively solve this problem, it is necessary to use a special mechanism, better known among specialists as a pipe bending machine.

If we talk about the purpose of such equipment, then it consists in performing gentle deformation of the workpiece.

To replace the initial shape of the part with the desired one, you need to make some effort which can be done manually or using an electric motor. A pneumatic or hydraulic press can also act as a mechanical device that can simplify the task of bending a metal product. In industry, the following types of pipe bending machines are most widely used:

with manual drive;
with electric drive.

To get a more complete picture of the design of a machine for bending profile pipes, it is best to find a drawing that shows all its constituent elements. If desired and with certain skills, this equipment can be made independently. However, it should be borne in mind that such equipment will demonstrate a low level of performance.

Pipe benders of the simplest design are most widely used in housing and communal services. Enterprises specializing in mass production of products usually resort to models of pipe benders equipped with an electric drive. Each product created with the help of such a machine necessarily meets all the requirements of standards and specifications.

Every time you have to make a new product, it is mandatory to perform machine setup for bending profile pipes. In more detail about this procedure, it includes the following steps.

First you need to insert a template into the pipe bender that has the geometric shapes of the product being created.
After that, they are engaged in fitting all the working units of pipe bending equipment.
Having finished working with the pipe bender setting, they begin to bend several product samples, and then match them with the template.
When you have to deal with a large number of blanks, it is necessary to check the finished products to ensure that they have the necessary parameters. If serious deviations are found between the finished products and the template, then it is necessary to re-adjust the pipe bending equipment.

There are enough videos on the network that allow you to get acquainted with the features of the operation of electrically driven pipe bending units. Moreover, regardless of the design of the equipment, it uses the same kinematic scheme mechanism. This point must be taken into account if you decide to make a pipe bending machine with your own hands. And best of all, if you yourself make a drawing for the future machine.

A feature of home-made machines is that when using them, situations are quite frequent when the workpieces are flattened. This gives rise to in the area of bending creases. Workpieces that have such defects are no longer suitable for use.

However, everyone can avoid such unpleasant results. This can be achieved if, at the initial stage, the technology of bending on shaped pipes with different sections is worked out. Based on practical experience, today there are enough people who are interested in profile pipe bending services. First of all, this should include the owners of cottages, who often have to build greenhouses with their own hands. It is possible to provide such a service only on the condition that the entrepreneur resolves the issue with the main component, without which it is impossible to provide them - he buys a pipe bending machine.

In order for the selected equipment to most effectively solve the problem of bending products, it should be take into account the following parameters:

version, which can be portable or stationary;
control, which can be automatic and manual;
type of drive, which is manual and electric.

If we talk about the price of a particular model, then the main attention should be paid to the options that are provided for the selected device. If the buyer is not interested in the high accuracy of products, then he may well limit himself to purchasing a machine that has a simple design. There may also be an alternative here - making a pipe bender with your own hands.

We make a machine with our own hands

If you are considering the option of making a pipe bender with your own hands, then the first thing you need to do is to familiarize yourself with the drawing of the device.

In the design of such an apparatus, one can highlight the following items:

bed;
conveyor;
bracket with guide corners;
top roller;
clamp.

The assembly of the listed components is carried out separately, and upon completion of this work, they proceed directly to the assembly of the machine as a whole. Even before starting the manufacture of a pipe bending machine, you should take care of the availability of the materials, parts and devices necessary for the machine. You can complete the work on the manufacture of a pipe bender if you have a welding machine and a set of tools. First you need prepare all the basic elements, after which they already begin work on assembling them in a certain sequence.

Bed assembly

The bed is an element that looks like a regular table or workbench. For information about the required materials and components from which this device is assembled, you should look at the specification.

For the manufacture of legs, you can use a channel or pipe segments reaching a diameter of 100 mm.

If it is planned to use welding to connect the main elements, then care should be taken that there are all dimensions are met which are shown in the drawing. Having completed the assembly of the frame, making sure that it is securely fastened, you can proceed to the installation of the conveyor.

Assembly and fastening of the conveyor

The conveyor is a design in which there are two rollers located on opposite sides of the frame. For high-quality installation, it is necessary to familiarize yourself with the conveyor drawing, which contains all the necessary information.

Particular attention should be paid to the chain sprocket on the shafts, which must be firmly and accurately fixed. Next, they proceed to install the tensioning mechanism, the design of which also provides similar sprocket. The function of this part is to select the optimal level of drive chain tension.

Clamp assembly

For the role of the clamping mechanism, you can usually choose a simple clamp. And here it is important to rely on the data that are given in the drawing. In order for this element to function correctly, all installation dimensions must be observed.

If certain deviations are found, the degree of pressure will be such that it will no longer be possible to guarantee the necessary accuracy in the manufacture of products. A similar approach should be followed when installing rolling rollers. When all operations for assembling the clamping mechanism are completed, it is necessary to make sure that the equipment is working by trying it in acceptable modes.

To carry out such tests, it is necessary to take pipes of different diameters. The bending operation itself is performed according to pre-calculated parameters.

Particular attention should be paid to ensure that no deviations are observed between the results obtained and the calculated geometric dimensions. If we talk about a home-made pipe bender, then such a machine can be used to process not only ordinary round pipes, but also profile products. If you decide to make pipe bending equipment so that you can regularly fulfill many orders with it, then you should take care of compiling instructions for the rules for its maintenance.

Operation and maintenance of the machine

Pipe bending equipment of the manual version is distinguished by the fact that it is very easy to work on it and at the same time during its operation seldom malfunctions. But, despite this, you should still regularly check the performance of its component parts and prevent exposure to aggressive environmental factors.

Precipitation poses the greatest threat to it. First of all, the rolling rollers should be protected from contact with moisture, as this is fraught with the formation of rust. To solve this problem, you can use a tarpaulin shelter.

If the option was originally considered with the creation of a portable pipe bender, then a dry room should be used as a storage place for it. Having finished work on bending profile pipes, the machine must be put in order, dust, dirt and sand must be removed from its working units. In order for stationary machines for bending profile pipes equipped with an electric drive to demonstrate high productivity and efficiency for a long time, they need to be provided with regular maintenance and preventive maintenance.

Conclusion

A machine for bending profile pipes is an effective device with which you can quickly and effortlessly give any metal blanks the desired shape. Moreover, to complete this task, it is not necessary purchase a ready-made pipe bender. Possessing the necessary skills, each owner can make such a machine with his own hands. Having at hand the drawings of each constituent element, it is possible to make a pipe bending machine that will demonstrate high performance.

It must be remembered that the pipe bending machine requires special attention. Maintenance is one of the most important activities, the correct implementation of which will ensure a long service life of the machine. To do this, care must be taken to minimize the interaction of pipe bending equipment with negative factors that can reduce the life of certain working parts of the machine. Compliance with such recommendations will allow the pipe bending machine to perform its function of deformation of metal products for many years.

The need for a device that can bend profile pipes arises in many cases. A similar tool is necessary when arranging a gazebo, a canopy, creating greenhouses. Today, bent pipes are sold on the market, but the high cost makes their purchase unprofitable. It is much cheaper to build and create bent profile pipes on your own.

Types and design features of profile benders

Machine tools capable of bending profile pipes differ in design from conventional tools. Profile materials have increased strength. Accordingly, in order to bend them, you need to make more effort.

In addition, usually the bend of the profile pipe has a large radius. In this regard, the design of the profile bender includes three rollers. Of these, depending on the preferences of the master, the mobile can be:

left roller;
middle roller;
right roller.

Roller for pipe bender

If the middle roller is movable, the outer elements are fixed to the body. They rise slightly above the base plane. If one of the extreme rollers is movable, then it moves along with the base. Others remain motionless during this time.

The principle of operation of such a tool is quite simple and is based on cold rolling. The profile pipe is placed between three shafts. The pressure that bends the metal is generated by the central, middle roller. If the pipe only needs to be bent in one particular section, a special spot machine must be used. The rolling machine allows you to get an arched profile.

Depending on the application of what force the machine works, the following types of profile benders are distinguished:

mechanical. The bend is created by manual pressure;
hydraulic. Additionally, a hydraulic jack is used, with the help of which pressure is created;
electric. The machine is equipped with an electric motor that creates a bending force;
electrohydraulic. The electric motor drives the hydraulic cylinder.

If the machine is designed for pipes with a small section, a hand-pull tool will do. Otherwise, it will be impossible to stretch the profile without special devices (for example, an electric motor).

What materials and tools are needed to make a pipe bender

On the modern market there is a wide variety of tools designed for profile bending. They differ both in features and functionality, and in price. However, any master can independently make such a machine, paying only for individual components. Some of them may already be in stock, others will have to be purchased.

So, to create a machine, you need to acquire:

corners;
chain;
chain tensioner;
blanks for the manufacture of rollers and shafts;
channels;
bearings;
bearing housings;
drive sprockets;
hydraulic jack;
drive shaft handle;
springs (if a jack will be used);
bolts and nuts.

There are many options for the manufacture of machines for bending profile pipes. Some of the parts listed above may not be needed. It all depends on the chosen method of creating a tool. In addition to materials, you will also need tools. In order to create a machine, the master will need:

drill (electric);
apparatus for welding;
a hammer;
grinder (angle);
drills (for metal);
wrenches and end wrenches.

The most difficult task is the manufacture of the pressure roller and drive shafts. You will need to create them. Not every master has such equipment. However, you can find a turner who, for a moderate fee, will do all the necessary work.

Assembly process

Before starting the assembly, it is strongly recommended to create a drawing of the future device. This will make the task much easier. Although today there are a large number of ready-made drawings, it would be better if the master creates it himself, taking into account his own needs.

The whole process of creating a pipe bender for a profile pipe with your own hands consists of the following steps:

Creating a roller and shafts (in the absence of proper qualifications, it is better to entrust this matter to a professional turner).
Installation of bearings in cages.
Determination of the location of the keyways on the shafts.
Drilling holes in restrictive nozzles, cutting threads intended for clamping bolts.
Creates a platform on which the pinch roller will be installed. In (if there is none, a thick metal plate will do), four holes (paired) are drilled, for which clips with bearings will be attached.
Screwing the pressure roller.
Welding to the platform of the eye (nuts M8 are used).
Manufacture of the frame and supporting legs using a welding machine.
Suspension of the platform on which the roller is installed to the frame with the help of springs (use the upper cross member of the frame).
Drilling holes in the base frame. With their help, a variable distance between different shafts will be provided. In this case, it is necessary to carefully monitor the distance between the holes, because in the event of an error, the pipe will not only bend, but also shrink.
Installation of support shafts. Installation of the driven and driving sprockets, drive chain.
Tensioner installation, elimination of chain slack.
Creating a drive handle. A steel bar with a diameter of twenty millimeters can be used as a starting material.
Installation and fixation of the jack on the upper platform. Nuts and bolts can be used for fixing.

After assembly, it is recommended to conduct a test during which assembly errors (if any) will be detected. To do this, you need to put a piece of the profile pipe on the lower shafts, and press it against them with a jack. Next, you need to put the device into action by turning the handle.

Another version of the device

You can create a machine for bending a profile pipe with your own hands in another way. This will require fewer materials. It will be possible to do without an expensive jack. The process of creating a simpler machine consists of the following steps:

Creating a frame that looks like a longitudinal table. Welding can be used to connect elements. In this case, it is necessary to take into account the voltage that will be exerted on the individual elements of the device. It is important that the frame is stable. This can be achieved by fixing to the floor.
Attachment of two rotating shafts just above the table. The third shaft is placed even higher, between the first two. The distance between the outer shafts and the central element can be changed. This will affect the bend radius. However, it is important that both extreme elements are at the same distance from the central shaft. In the future, this parameter can be changed depending on the bending radius, which must be obtained in a particular case.
Chain drive mount.

This machine has a simpler design. However, working with it is somewhat harder than with the previous device. In any case, after the manufacture of the tool, it is recommended to clean it of rust and paint it. This will save the pipe bending machine from damage.

The first machine is more thorough. Pipes curved on such a unit will have a cleaner look. In addition, less force will have to be applied to process the profile. The second machine is cheaper and easier to manufacture. However, the quality of the bend may be worse. What tool to make should be decided by the master himself, focusing on his needs.

Thus, bending machines for a profile pipe can be manufactured independently. The final cost of such tools will be lower than industrial products on the market. To create a machine, you will need certain materials and tools.

There are a large number of drawings of such devices, but it would be better if the master himself creates a drawing, taking into account all the features. You can make a tool, focusing on the instructions above.

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 a profile (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 the production task and the technical characteristics of the 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 with 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!

The process of obtaining curved parts is called flexible. Often, when carrying out such a process, pipes or profiles with a rectangular cross section are used as blanks. This type of material processing gained great popularity long before the invention of the first metalworking machines: the metal was preheated at the bend, which made it plastic, and then the desired shape was given. However, preheating to a plastic state violated the crystal lattice and thereby changed the physical properties of the metal, the process was laborious and could not be used in large-scale production.

Features of profile pipe bending machines

Immediately after the appearance of bending machines for profile pipes, the cold bending process began to gain popularity in various industries, where large-scale production was established. Many began to make machine tools with their own hands. This growth in popularity can be attributed to the following features of bending machines:

You can get a part of almost any shape.
Depending on the thickness of the metal and its type, the shaping work can take anywhere from a few minutes to several hours. It is important to note that the requirements for increasing the time can be incorporated into the drawings with the specification: obtaining a certain strength at the place of deformation, the brittleness of the alloy, etc.
With the correct preparation of the technological process, the properties of the metal do not change.
It is possible to automate the work and use of such machines in conveyor processing.
The design of many bending machines is quite simple, which means it is reliable. It should also be noted the widespread use of homemade machines. With your own hands, you can create a design that can be used in small-scale production, when pipes of small diameter are bent.

The processing itself is quite simple, but its use became possible only after obtaining alloys with a good plasticity index. If the alloy is brittle, it cannot be used for cold bending.

Purpose and scope

There are a huge number of options for bending machines, especially for home-made options. Despite this, the following similarities can be noted:

They can be used to obtain blanks of only a certain shape. For example, some are used to obtain a right angle, others are bent in a circle, others are designed for spiral winding, etc. However, there are also complex installations with the possibility of changing the machine. So installing rollers of a different diameter and profile in a bending machine allows you to change the bending angle.
A very important indicator is the features of the pipe profile, cross-sectional diameter, wall thickness, type of alloy. These indicators affect the possibility of using one or another bending method.
Alloys that can be subjected to cold bending: aluminum, alloys and copper alloys, steel. The power of the machine determines the possibility of processing pipes with a certain cross-sectional diameter and wall thickness, in some cases, the processing speed.

Application area:

petrochemical industry.
Engineering.
Construction.
Energy and electrical industry.
Shipbuilding.
Light industry.

When performing cold bending, the metal is subjected to strong loads, and the increase in ductility is caused by partial heating in the area where these loads occur (only with fast bending). That is why, both when using professional and home-made machines, it leads to the following changes in the metal:

Thinning of the walls at the bend.
Flattening of the pipe at the bend. At the same time, it is quite difficult to give the original shape.
Formation of fractures and corrugations.
With significant indicators of the elasticity of the material, it is possible to change the resulting shape after bending.

Video on building a greenhouse using a homemade bending machine

Making a homemade bending machine with your own hands

The design with which bending is carried out can be created by hand. For work you will need the following:

Three shafts, which can have a flat or recessed end face profile. It is worth noting that the presence of a recess with a profile for the workpiece will make the design more efficient. You can make a profile with your own hands. These shafts will carry out the bending.
The metal profile that will be used to create the frame.
Chain drive mechanism.
Chain.

The whole process of creating a pipe bending structure can be divided into the following stages:

Create a frame that looks like a longitudinal table. You can connect the elements by welding, but given the possible stress during operation, bolts with nuts should also be used. When creating a frame with your own hands, it is worth remembering that it must have good stability. Therefore, it should be possible to fix it to the floor.
Two shafts, which have an axis of rotation, are mounted just above the table at a certain distance, the third is slightly higher in the middle. Mounting method - bolt and nut.
The distance between two shafts located in the same horizontal plane determines the radius of the bend. Therefore, several options for their location should be provided (but they should always be equidistant from the central shaft). Thus, you can make a machine with your own hands, which can be used to obtain parts with different bending angles.
We carry out the fastening of the chain drive.

Similarly, with your own hands, you can make a simple and reliable design for bending pipes.

Bending profile pipes is a fairly common procedure, for which a special device is used - a pipe bender. You can make a pipe bender for a profile pipe with your own hands, or you can buy it on the construction market or in a store.

Serial devices differ in principle of operation, they can have different types of drives, however, certain experience is required to work on any of these devices. Limits the use of devices manufactured in a production environment, and the fact that they are not cheap. A good way out in all such situations will be the independent manufacture of a device designed for bending profile pipes, for which you can use improvised means.

Required structural elements

To make a pipe bender with your own hands, you can use the drawings of various designs. Their choice is determined mainly by what materials you have. Most often they opt for front-type pipe benders, the design of which includes:

three rollers (shafts), which must be metal;
drive chain;
axes of rotation;
a mechanism that will set in motion all the elements of the device;
metal profiles from which the frame of the device will be made.

To understand how to bend a profile pipe on a home-made device, it is important to understand what technology this process uses. As a rule, pipe benders use the principle of rolling or rolling, which minimizes the risk of fracture and damage to the pipe.

To make a bend on a profile pipe using such a device, it must be inserted between and turn the handle. The use of such a simple bending device makes it possible to obtain bends on a profile pipe that fully correspond to the specified parameters.

To make a simple machine for bending profile pipes, you will need the following structural elements:

ordinary jack;
metal profiles and a shelf necessary for the manufacture of the frame;
springs with high strength;
shafts in the amount of 3 pieces;
drive chain;
a number of other structural elements.

When using such a device, the operation of which can be seen in one of the videos below, the pipe is placed on two side rollers, and the third one is lowered on top of it, creating the required force. To give the pipe the necessary bend, you should turn the handle that drives the chain and, accordingly, the equipment shafts.

Pipe bender manufacturing process

To make the device receive, you must complete the following procedures.

Prepare a reliable frame, the elements of which are connected by welding and bolting.
According to a previously prepared drawing, install the axis of rotation and the shafts themselves, two of which are placed above the third. The distance at which the axes of such shafts are located determines the bending radius of the profile pipe.
To drive such a bending mechanism, a chain drive is used. To complete such a transmission, it is equipped with three gears, and the chain itself can be picked up from an old car, motorcycle or other equipment.
To bring such equipment into action, a handle is needed, which is connected to one of the shafts. It is due to such a handle that the required torsional force is created.

Pipe bender manufacturing instructions

It is not difficult to make a pipe bender for a profile pipe on your own if you follow the following technological sequence.

Gears, bearings and rings are placed on the pressure shaft, which are connected to it with a key. First, a drawing of such a shaft, a cage for bearings and rollers is developed, then these parts are machined, which is best entrusted to a qualified turner. In total, for this device, it is necessary to make three shafts, one of which is suspended on springs, and the other two are located on the sides.
Then it is necessary to drill holes in the rings, which are necessary for making grooves and threading.
Now it is necessary to make a shelf, for which a channel is used, in which holes are also drilled and threads are cut, which are required when mounting the pressure shaft.
After completing the preparatory measures, the entire structure of the equipment must be assembled, for which welding and bolted connections are used. First of all, the frame is mounted, which also serves as the legs of the pipe bender.
The next step is to hang the shelf with the pressure shaft attached to it, for which springs are used. After that, it is necessary to install side support shafts on a home-made pipe bender, on one of which a handle is attached.
The final touch is the installation of a jack on the pipe bender.

Some subtleties of the installation work:

the pressure shaft, fixed with dowels, is additionally screwed to the shelf;
installation of the pressure shaft is carried out according to the following scheme: the shaft is installed on the shelf, to which the nuts for the springs are preliminarily welded, after the installation work is completed, the shelf is turned over and suspended on the springs;
chain tension is carried out using a magnetic corner, which is used as a holder;
when twisting the stars, dowels are used, which are pre-made from the grower;
the drive handle for the bending machine is made with a turning tube;
a jack on such a home-made device is installed on a suspended platform, for which bolted connections and welding are used.

Production of a hydraulic pipe bender

On the Internet you can find a lot of photos and videos on how to independently make a device for bending profile pipes with a hydraulic drive. The manufacturing process of such a pipe bender, equipped with a hydraulic cylinder, an injection device and pipe stops, is a rather laborious undertaking.

In the drawing and in the design of such a pipe bender, the following elements can be distinguished:

hydraulic type jack with a lifting capacity of at least 5 tons;
shoe;
rollers in the amount of 2-3 pieces;
powerful metal channel;
thick metal plates and other details.

To perform the required bending of the profile pipe using a hydraulic device, it is necessary to insert it into the shoe and fix both ends of it. After that, you need to use the jack, which, with its rising rod, presses on the roller that acts on the pipe and bends it. After the required bending angle is obtained, the process can be stopped and the pipe can be removed from the pipe bender by turning the jack handle several times in the opposite direction.

Pipe bending methods using a homemade machine

The question of how to bend a profile pipe with a homemade pipe bender is unlikely to confuse you if you read a few more recommendations. On hydraulic machines, it is possible to successfully bend profile pipes from different materials, as well as thick-walled products. Such an operation can be performed both by cold and hot methods, which involve preheating the pipe section.

Thus, a manual hydraulic bending machine can be used to act on a pipe in two ways:

cold;
hot.

Cold bending is the simplest bending method and is used for pipes made from ductile materials. The subtlety of such a process is the filling of the pipe before the flexible sand, salt, oil or cold water. This allows you to get a better bend without significant deformation of the pipe.

If you are interested in the question of how to properly bend a profile pipe with thick walls or made of materials of increased rigidity, then the answer to it will be the use of the hot bending method.

To the question of how to bend a profile pipe as accurately as possible and without unnecessary labor, some useful tips from qualified specialists will answer.

Removable rollers of various shapes will allow you to comfortably work not only with profile pipes, but also with round ones.

In manual pipe benders for bending profile pipes, you can not use sprockets, but assemble a structure based on a single drive roller. Instead of a clamping screw, a jack is often used in such pipe benders.
If you are bending according to a template, then so that the pipe does not slip off it, you can use metal hooks as stops.
If it is necessary to bend a profile pipe under a large radius, it is best to use a pipe bender with three rollers.
To get a more versatile bending machine, you can make its thrust rollers movable. So you can change the bending radius of the pipe.

In the video below, the master shares his experience in building a pipe bender from scrap materials.

In order to strictly observe the dimensions of the required pipe bend, it is best to perform such an operation using a template that is made of wood. Even the simplest manual pipe bender using such a template will allow you to bend a profile pipe with exact observance of the specified parameters. By the way, such templates are mainly made to implement the simplest manual bending methods.