Many DIYers do not know how to bend shaped tube independently, without contacting the workshops to specialists. In fact, performing such an operation is not so difficult if you acquire the necessary equipment.
Thousands of owners of land plots outside the city and private housing construction literally put their souls into their real estate. They try in every way to give it an original appearance... Moreover, such people strive to perform many improvement operations with their own hands, being truly proud of their work.
Very often, when arranging a suburban "estate", a person needs to bend a profile pipe, which is now very actively used for various purposes, ranging from the construction of fences and ending with the installation of an unusual visor over the entrance to the house. Bending a pipe manually without using special devices designed for such purposes is difficult, and sometimes simply unrealistic.
This statement is especially true for shaped tubular products. If a circular pipe can still be heated, wrapped around a special template, securely fixed one of the ends of the structure, and then try to bend it at the required angle, then this method is absolutely not suitable for profile products.
There is only one way out: to adopt a device for bending the profile, to study well the principle of performing the operation with its help, and to solve the problem of giving the pipe the desired configuration. Note that even with the help of special equipment, it will not be easy to carry out such a procedure - there is a high probability that the pipe will be flattened or its cross-section will deform under the hands of an inexperienced person.
To minimize the risk of such an unfavorable development of events, it is recommended to pre-freeze the pipe by placing it in a large refrigeration unit industrial type. If there is no large refrigerator, it is recommended to perform the bending operation in winter, when the outside temperature is freezing.
Before freezing, one edge of the profile product should be reliably plugged, then the pipe should be filled plain water and close the other end of the structure. After that, we place the workpiece in the chamber or take it out into the cold, wait until the liquid in it completely freezes. Frozen water will prevent the product from deforming as it bends. And the process itself, believe me, will go much easier.
An alternative to the described method is a technology in which sand is poured into the pipe, plugs are placed at both ends of the structure, then 2-3 small-diameter holes are made in it. They are necessary so that subsequently, when the workpiece is heated, the gases formed in the pipe have an outlet. If the holes are not made, there is a risk of deformation of the structure.
After completing all the indicated operations, you can start bending. To do this, using a blowtorch, you need to heat the selected area along which the bending will be carried out, and then boldly bend the pipe. The described preliminary steps (freezing, filling with sand, heating the profile product) do not have to be done when you use modern pipe benders designed specifically for working with pipes.
Such a device is understood as special devices of several types, which make it possible, with a minimum of manual effort, to bend structures made of round or shaped steel (for example, for home greenhouses and greenhouses, sheds, and so on). All pipe benders are usually divided into two large groups:
The advantages of using pipe benders are as follows:
In addition, the benders provide a truly elegant appearance structures that are made from one-piece tubular products. From the point of view of decorative attractiveness, such designs can be considered flawless. Try to achieve similar results if you do not know how to bend a profile pipe using a pipe bender. It is unlikely that you will succeed.
The choice of a particular machine for bending pipes depends on the material of the products, as well as on the type of work that you will carry out using steel or (as you yourself understand, there is no need to bend plastic structures with a pipe bender). For example, copper pipes for installing a heating system or water supply are bent simple pipe bender manual type, which is designed specifically for this material.
But already metal products for plumbing work are bent with the help of a device that can cope with a more durable and harder material. With profile pipes, of course, they work exclusively with a roller device, which was created specifically for performing such activities. By the way, it makes it possible to bend round seamless pipes with thick walls.
In hardware stores, you can easily find different types pipe benders of foreign production. But their price often does not suit Russians, who prefer to buy proven domestic mechanisms. Fortunately, in terms of their capabilities, they are no worse than imported products.
The most popular devices for bending profile products are recognized hand-held machines"PG-1" and "PG-2". The first of them costs no more than $ 500, it is made in a compact form, being mobile (portable) equipment. Due to this, the mechanism can be used directly at the place of execution. installation works for bending copper, metal and with dimensions not exceeding 40 by 40 millimeters.
Structurally, the device is a frame with three rollers fixed on it. The pressure roller (it is central) allows the pipe to be pulled. The ease of rotation of this roller is due to the presence of a comfortable handle. The width of the rotating parts of the machine can be changed to work with pipes of different sizes.
The profile-bending "PG-2" differs from its brother in a more powerful design. It easily bends pipes made of the above materials with dimensions of 30 by 60 millimeters. With its help, it is even allowed to bend pipes into rings. It is clear that the cost of such a model is higher. You can buy it for $ 750-800.
We hope that you now have no questions about how to bend a profile pipe.
Most owners of summer cottages, cottages and private houses have to deal with the solution of the question of how to bend a profile pipe at home without a pipe bender. Desire to presentable and original furnish adjoining territory leads to the need to create arched structures. These are awnings, gazebos, canopies and greenhouses for cellular polycarbonate. Buying factory-made products comes with a cost that can be avoided by bending steel on their own... For this, the tools and materials available in each workshop are sufficient.
Rolled metal, which has a rectangular cross-section, is easy to use, the workpieces can be joined under different angles... Difficulties arise when there is a need to give the details of the structure a curvilinear shape. This is due to the fact that a tensile force acts on the outer wall of the product, and the inner side is compressed.
Attempts to bend a profile pipe without a pipe bender are associated with the following problems:
It is not difficult to avoid such complications. It is enough to approach the matter competently and thoughtfully.
The owners of summer cottages often have to think about how to bend a profile pipe for a greenhouse quickly, without spending money on professional equipment. Even with financial resources it is not always possible to immediately find arcs of the desired shape and size.
You can use one of the suggested methods:
With time and creativity, non-standard approaches can be used.
In order for the bending of shaped pipes along the radius to bring the desired results, it is necessary to take into account such factors as:
There are the following alternative methods for bending rectangular pipes:
To reduce the likelihood of deformation of the walls of the product, a thin and long steel spring can be inserted into it. When heating is used, do not cool the hot steel with water. From this, it can crack or burst. Better to use the practice. When using muscle power, it is recommended to put a long and strong lever on the free end of the link. This way you will be able to achieve the desired goal with less effort.
To bend a profile pipe with your own hands, you must have the following devices and equipment:
To achieve an accurate result, it is recommended to use a special tool. The jig is a device for accurate calculation and cutting of abutting parts. The mechanism is used for marking at the ends of arches, stops, jibs and crossbars. Thanks to the use of a jig, the weld seam is smooth and neat.
The greenhouse frame with a square or rectangular cross-section attracts with its reliability and durability. A very strong metal structure allows maximum light to pass through, because its racks, supports, ties are much thinner than those of wooden rivals. The metal is inferior in manufacturability. Without knowing the nuances, it is difficult to make an arched arc or frame for a door from a straight blank. Because of these complications with a metal base, it is in vain that they prefer to buy "green houses". However, if you thoroughly figure out how to bend a profile pipe for a greenhouse, you can build an inexpensive arched structure with your own hands at low cost.
The bending of metal products, regardless of the cross-sectional shape, consists in giving them a partial or full smoothly curved configuration. One of the common locksmithing procedures is performed either under pressure alone or under pressure in combination with heating the bent section. At this time, compressive forces from the inner side of the workpiece and tensile forces along the outer wall... Complications are that:
Without knowledge of the intricacies of profile bending, there is a risk of simply crushing the product, spoiling the workpiece. But recklessness is not our way! Moreover, if it is accompanied by material losses. For the glory of rational economy, we will take into account all the vagaries of the profile and characteristics of the "iron" material. Let's not forget about the dimensions of the section, the thickness of the walls of the profile pipe, the required bending radius and the elasticity of the steel alloy. Focusing on the specified parameters, we will choose the correct technological path - it is also a bending method.
Profile pipe-rolling differs from the standard round version in the shape of the section, which can be square, oval, rectangular or flat-oval. According to the regulations of GOST R under the number 54157-2010, the round product is also included in the list of profile products. However, in greenhouse construction, products with a square and rectangular cross-section are most often used, for example, profile pipes 40x20 mm, because it is easier to attach a coating to their even flat walls.
For various national economic needs, products are produced in a wide range of sizes. It differs in configuration and cross-sectional area and, naturally, in wall thickness. The set of sizes determines the plastic possibilities. In professional language, they are called the minimum permissible radius of curvature. So, before you know how to make a workpiece for the frame, you need to find out what the smallest radius of flat round deformation the workpiece can "survive" without damage.
To determine the minimum allowable bend radius of a square or rectangular profile, we need the height h, because:
The indicated limits are necessary for those who conceived to make racks, shelves and frames for vents or doors. The wall thickness also makes adjustments to the area of limitations. Wide pipes with thin walls up to 2 mm thick are generally not recommended to bend. Better to use welding.
Home craftsmen, who decide to make arcs for, need to take into account that products used in everyday life made of ordinary carbon or low-alloy steel alloys tend to "spring" slightly after applying efforts to them. They seem to be trying to return to their previous state. Therefore, after a novice locksmith with his own hands completes the bending of all arcs, he will have to repeat the processing and re-fit the arches according to the template. It is desirable to initially take into account the value of the plastic moment of resistance Wp. It is usually indicated in the documents of the building material sold. The smaller the moment, the less fiddling with fitting.
Profile pipe-rolling is bent both in cold and hot condition. Heat gas burner will significantly increase plasticity. However, a material of small cross-section bends excellently without unnecessary temperature effects, because thin pipes are quite plastic and more easily amenable to the force applied to them.
There are no precise guidelines for using heat for bending. The standards indicate only the dimensions of the round bars, according to which the flame must be exposed to the treated area at Ø 100 mm or more. With square and rectangular shapes, everything happens a little differently. Based on the experience of craftsmen:
How simpler and easier it is to bend a profile with a height in the range from 10 to 40 mm at home, the performer will have to decide on his own. If there is a profile bending in the arsenal of the master, with its help you can create an arched rounding without heating. There is no apparatus, it is better to test your strength in advance. To do this, you need to clamp one end of the material in a vice. On the other end, put on a pipe larger than the height of the profile, and pull on the "shoulder" enlarged in this way. If it works out, there is no point in heating metal products.
We will deform the non-yielding material by the hot method, having previously filled it with sand. So the quality of processing will increase, and the uniformity of the fold will be ensured. We'll stock up on tarpaulin mittens for hot work and start:
The described method is good for the formation of single corner bends, because it is strongly not recommended to heat pipes several times. Metal loses strength from repeated thermal shock. However, when creating a rounded arch, repeated heating is inevitable. After all, it is unrealistic to do the work in one go, and chilled to a light cherry hue, i.e. up to 800 ° C, the workpiece can simply burst.
Cold plastic deformation of profiled steel is carried out with or without filler. Material with a profile height of up to 10 mm does not require filling. A thicker pipe is best filled with sand or rosin. An alternative to the sand filler will be a tightly wound spring, the dimensions of which will allow it to fit tightly into the cavity at the processing site. The spring washer will prevent a sharp change in the profile section at the bend points.
You can bend "cold" at home:
It is more reasonable and profitable to rent technical means of mechanization of bending if they are needed for a one-time construction of a greenhouse. If, in the future, the construction of green houses for relatives and neighbors or the construction of a beautiful metal fence, for example, there is a reason to acquire your own bending machine.
In the family of devices and units for bending there are representatives of varying degrees of technical complexity. To begin with, consider the means for those who are puzzled by the question of how and by what means it is possible to bend a profile pipe without the use of special equipment. Then we move on to homemade rolling plants.
The use of elementary "helpers" for cold deformation is regulated by the size of the material:
To form a bend with a large radius of curvature, such as arcs for an arched frame, fixed rounded templates with clamps are used to fix the workpiece. These devices belong to the category of plane-parallel plates. The workpiece is forced into a groove, the dimensions of which are equal to the dimensions of the pipe. Manually bent by means of a mandrel, the pipe takes the shape of a predetermined contour.
If the home locksmith is not deprived physical strength, for his own needs, he will need a simple tool for a rather laborious deformation of a profile pipe. It can be made in the form of a panel attached with clamps to the work table or workbench. In the case shown in the photo, the bending plate is welded to a metal pedestal, but it is screwed with four bolts to concrete floor workshop. To remove the device at the end of the work, it will be enough to unscrew the bolts. After dismantling, no fastening pins remain or rise above the floor surface, which means that nothing will interfere with movement and create traumatic threats.
The principle of manufacturing the working plane is extremely simple:
The pedestal is multifunctional. Its owner has the opportunity to use it as a miniature workbench for performing an impressive number of plumbing operations.
The method is suitable for products with a wall height of up to 25mm. The foreman will need a large workbench and a significant amount of free space around the working area. One edge of the workbench is punched with frequently spaced holes for fixing the mandrel and for choosing the optimal position of the part holding the pipe. The template for the impending plastic deformation is cut from thick plywood. True, the plywood mandrel is only suitable for one-time bending procedures. If there is a lot of bending work to be done, it is better to weld the mandrels from a steel corner.
Significant volumes of deformation work require mechanization. Mass production of curved parts will take away too much health from the performer. To facilitate bending, it is advisable to make a machine according to the drawing. They are mainly used for working with large-sized workpieces. The main working bodies of the hand-held unit are three rolls, two of which are fixed motionless. Changing the position of the third movable roll determines the bending angle.
If the above methods are not acceptable, then the future owner of the greenhouse has two options - rent manual installation or ordering the manufacture of rounded parts. The process of deformation of the workpiece was demonstrated by the video: how it is easier to bend a profile pipe - by repeated rolling or physical impact, it is up to the performer to decide.
When working manually, it is important to follow the rules for bending shaped pipes and not make sudden movements. It is necessary to monitor the uniformity of deformation on the outside and inside of the rolled product. However, you should not be too upset about the small folds on the inner surface of the fold: they can be corrected with hammer blows. Before starting work, it is necessary to make templates from wire, chipboard or gypsum board for verification and obtaining a result corresponding to the project.
In the process of work (usually completely unexpectedly), the question may arise - how to bend a profile pipe at home? Today, there are several enough effective techniques, and if you have a certain skill, you can cope with the task without going to the workshop to the professionals.
When we talk about the bending of shaped pipes, we most often mean the formation of an arc of a certain radius from the workpiece. The larger this radius, the easier our task, since this way the inner cavity will undergo less deformations ().
Note! It will not work to bend round and profile pipes at right angles: a break is almost guaranteed. For this purpose, either a welded joint or special adapters are usually used, allowing two separate segments to be joined.
If the need for the manufacture of arcs arises quite regularly, then it is worth purchasing a manual or stationary roll forming machine... It is a device with several rollers that act on the workpiece, giving it the desired shape.
The instructions for working on the pipe bender are quite simple:
To improve the efficiency of all operations, it is worth following these rules:
Price household devices this type starts at about $ 100. That's why you can either rent a machine for a few days to process a small number of parts, or use the services of a workshop.
However, a pipe bender is not always at hand. That is why any craftsman should study in advance how to bend a profile pipe at home using more common tools.
If the integrity of the internal cavity is not critical for us, you can use an angle grinder and a welding machine:
Advice! if necessary, cut out the excess metal with the same grinder.
If the preservation of the integrity of the walls is essential, then in order to fulfill the task before us, you need to make a special spring with your own hands:
This technique is quite laborious, since the manufacture of the spring takes a lot of time and effort. On the other hand, you can use the elastic insert many times, so that the described method is quite suitable for large-scale work.
If there is no suitable steel wire at hand, and the need to make an arc from a tubular blank is quite acute, you should use one of the methods that involve internal filling.
Liquid can be used as filler:
In the warm season, as well as when processing thick-walled workpieces, we replace the water with sand:
If you at least periodically work with metal, then you need to know how to bend a profile pipe without a pipe bender. Of course, all the methods described cannot fully replace high-quality professional equipment, but in a critical situation they are able to come to the rescue, allowing you to solve the task as quickly as possible ().
A carport is necessary on almost any site: it is a good place to place a car, it is useful for creating a mini-greenhouse, recreation area, etc. The structure of the canopy most often involves the construction of a frame from shaped pipes: they are lightweight and have a high bearing capacity.
However, they are quite difficult to bend to give the desired shape, therefore, with their help it is difficult to create arched and other complex structures. How to bend a profile pipe at home?
There are a lot of options on how to bend a profile pipe for a canopy, but in most cases the use of special tools or equipment is required. Let's take a closer look at several basic methods:
Important! With this method, overheating of the metal must not be allowed. In this case, dross will appear, reducing the strength of the metal structure.
This method is generally inapplicable to galvanized pipes, since the zinc coating will simply burn out, and the steel will be defenseless against corrosion. Such a frame cannot be installed: it will quickly rust and may collapse at any moment.
Each of these methods has both advantages and disadvantages: in any case, you have to bend the profile pipes very carefully, calculating the radius. The metal is not designed for repeated bending, so it is advisable to finish this work in one go.
If it is necessary to carry out it again, the pipe may simply break; in any case, the bearing capacity of such a frame will be much lower. Since artisanal methods are much less reliable, it is best to use a pipe bender.
How to bend a profile pipe in a semicircle? To give it the desired shape, you can use various models of pipe benders and hand tools. Their use is beneficial for several reasons:
Copper pipes are much easier to bend than steel pipes, so you can use hand tools... To work with profile pipes, a pipe bender with a roller mechanism is used: it was specially developed for such tasks and is the most convenient option.
The most common model of this type of machine is "PG-1": three rollers installed on the bed make it possible to bend a square tube to a full ring.
Pipe bender "PG-2" costs almost one and a half times more, such a machine is designed for pipes with a larger cross-section and more durable metals. The robust design makes it possible to bend pipes with a profile of 30 x 60 mm.
How to bend a canopy pipe if neither a welding machine nor modern pipe benders are available? There are several bending methods that can be done in a typical workshop. Though they can't brag increased accuracy, some skill and folk ingenuity allows you to get a good result.
Such methods always give only relative results. On the machine, the result will be more accurate, and homework largely depends only on the experience of the master. Handicraft methods are suitable for creating common frames for greenhouses and greenhouses, but when building complex engineering structures, they can be useless.
Not everyone can afford to buy a stationary factory pipe bender, but you can easily use the services of specialists in this field. If you need to bend pipes, it is better to entrust this work to specialists, so that later you do not doubt the strength of the supporting frame.
Profile pipes make it possible to implement various construction projects and interesting solutions, and correctly executed bends will allow the construction of awnings and other frame extensions with curved elements.
