Rollers for sheet metal with your own hands: drawing, video
Such a technological operation, as rolling sheet metal, remains widespread for quite some time. Of course, rollers, which are used for sheet metal processing, have undergone major changes since its invention, but the principle of their action has not changed. The development of modern technologies has led to this, that today on the market you can easily find equipment, which allows you to perform such a complex technological operation, as rolling, even at home.
Rolling of sheet metal on an electromechanical machine
features of technology
Ice rink, to which products not only from metal can be exposed, but also from other plastic materials (rubber, plastic, etc.), Is a process, required to give the sheet blanks the desired configuration. Though, the most common is sheet metal rolling, can be subjected to such a technological operation and pipe products.
This uses special equipment, the main working elements of which are shafts, affecting the billet sheet. If necessary, give it a cylindrical shape, technological operation is called rolling (or rolling). When you need to increase the diameter of the pipe, the procedure is called flaring.
The principle of operation of the 3-roll sheet bending machine
Industrial enterprises use equipment with electric or hydraulic drives to perform rolling or flaring operations., and at home for this purpose use machines with a manual drive, which can be both serial, and homemade. High popularity of such technological operations, as rolling, flaring, which involve the deformation of the metal in the cold state, contributes to several factors.
- Steel or other metal, from which the processed products are made, which are not exposed to temperature and, in accordance, do not change their initial characteristics.
- In the structure of the material, which is subjected to such processing, no internal cracks are formed.
- The workpiece is deformed evenly over its entire surface.
- By cold deformation, the process of which can be controlled, produce products with the most accurate geometric parameters.
Due to the above advantages with the help of these technological operations perform processing not only large, but also miniature products made of steel and other metals (such, example, as jewelry details).
equipment, used
Equipment, which is used for rolling, differs not only in its versatility, but also the simplicity of design, so it is easy to make with your own hands. Of course, homemade rolling machines are optimal for home use, and to equip the production plant, where the load on such equipment is quite large, it is best to buy serial models of rollers, presented on the modern market in a great variety.
As serial, and homemade models of machines, by means of which rolling is carried out, work on the principle of running in sheet material around the main roll, located at the top. Side rolls also take part in such process, which can be moved, thereby adjusting the diameter of the molded shell.
The rolls of this machine rotate manually, and approach of the top roller is made by means of two handles
Important characteristics of rollers are the radius of their working elements - rolls, as well as the greatest thickness and width of the workpiece. Radius of rolls, in particular, affects this parameter, as the minimum bending radius of the workpiece. The larger the rolls in diameter, team, in accordance, greater value of the minimum bending radius of the workpiece of sheet metal. The value of the minimum bending radius is also affected by the thickness of the sheet. Usually, for rollers, the minimum bending radius of the sheet blank should be 5-10 times its thickness.
Given the high loads, which are felt in the process of rolling, only strong steel is used for their production, which significantly improves their performance. According to the number of working elements, there are two, three- and four-roll machines, and the most popular are the last two species.
The main differences between 3- and 4-roll machines
Rollers are bending 3-roll, working elements which can be located symmetrically and asymmetrically, although they are reasonably priced, have such disadvantages, as:
- low rolling speed (not more 5 m / min);
- the complexity of processing workpieces with a thickness less 6 mm, which can just slip between the rolls;
- lack of exact coordinates at the clamping point of the product.
Rollers are deprived of all similar shortcomings, on which the additional - the fourth - shaft is established. Due to the reliable clamp, the sheet metal workpiece does not slip between the rolls during processing. This provides a high speed of rolling - 6 m / minutes and more.
The machine with 4 rolls is capable to make, except cylindrical, oval and polycentric blanks
Rollers of this type, usually, are equipped with automated control systems, which has a positive effect not only on their productivity, but also on the accuracy of the processing. Great and, apparently, the only disadvantage of such a device is its high cost.
Classification of rollers by type of drive
According to the type of drive used, the equipment for rolling sheet metal workpieces is divided into the following categories:
- manually;
- electric;
- hydraulic.
The simplest in design are rollers with manual drive, it is their home builders who often collect with their own hands for their own needs.
On simple three-roller rollers clamp the workpiece, rotation of shafts and formation of radius of a bend is carried out manually
Significant advantages of such a device, which does not require any additional food for its operation, is:
- compactness and, in accordance, high mobility;
- reliability;
- ease of operation and maintenance;
- low cost (especially in that case, if the rollers are assembled with your own hands).
Of the disadvantages of this type of machine should be noted:
- low productivity;
- impossibility, especially in the case of homemade machines, to perform rolling of products from sheet metal of big thickness (more 2 mm);
- the need for significant physical effort for flexible steel sheet blanks.
Electromechanical two-sided rollers with software control
Machines are more productive and efficient in their work, equipped with electric drive. Of course, their cost, even if they are made by hand, above, than the price of hand rollers, but they allow to process sheet products of considerable thickness.
The most powerful are the rollers, operating from a hydraulic drive. Possibilities of such machines, which are large, allow to carry out successfully rolling of sheet preparations from metal even very considerable thickness. Devices of this type, usually, are installed at industrial enterprises, where to power, Reliability and functionality of the equipment are subject to high requirements.
Industrial rollers with hydraulic drive
Making bending rollers with your own hands
Due to the simplicity of the design of hand rollers to make them with your own hands is easy. Naturally, to assemble a working homemade machine, on which processing of sheet metal will be carried out, you need to have certain skills and have all the necessary tools and consumables. In addition to acquaintance with the recommendations for such a procedure, it is desirable to watch videos on this topic.
Drawings of homemade hand rollers for rolling wide blanks (click to enlarge)
First, that you will need to make your own rollers, - this is a drawing, which can be found online or compiled yourself. Having made a drawing, you can start preparing materials and assembling structural units, of which your homemade machine will consist. To such nodes, in particular, include:
- frame rollers, on which all their other elements are fixed;
- side racks, in the bearing units which will be installed rolls;
- directly the rolls themselves, made of high-strength steel (the number and diameters of these elements depend on, what technical capabilities you want to give your device);
- lever, which will rotate the lower rolls;
- drive unit (chain or gear), which ensures synchronous rotation of the lower rolls (should be borne in mind, that such rolls should rotate in one direction);
- pressure unit of spring type, due to which the pressing of the upper roll to the surface of the sheet metal blank.
Compact self-made rollers for processing of narrow preparations
The main details of compact rollers
Assembly of rollers begins with the manufacture of the frame, which can be welded with your own hands from thick steel blanks. The dimensions of this element, naturally, you need to compare with the drawings you have. As side racks, which are also fixed to the frame by welding, you can use powerful channels made of low carbon steel.
The elements of the drive unit are fixed on one of the racks, for which it has special holes. After the side posts with the drive unit are completely mounted, in their bearing knots rolls are established, which must be set to parallel and only then perform the final fixation of all other nodes.
Option of sheet bending rollers, made with their own hands
Before starting work on the machine, which you collected with your own hands, test bending should be performed on it, to immediately identify all existing shortcomings and eliminate them.
Find out, how to work with the streets, video can help you, but, essentially, this process is not very difficult. Ice rink, on whatever equipment it was performed, carried out in the following sequence.
- Sheet metal, which must be processed, fits on the two lower rolls.
- Using the upper roll, equipped with a pressure unit, the letter is pressed to the lower working bodies.
- Due to the rotation of the handle of the machine begins to perform rolling.
More on the topic:
Manual three-roll sheet bending rollers - we make with our own hands: drawing, Photo, video
