A tool that allows an employee without specialexperience exactly bend the metal sheet at the right angle, is called "sheet bending." With your hands this device can be manufactured by having straight sections of channels and corners with straight edges and planes, and a welding machine.
Surprisingly, in the practice of Russian mastersleaf bending is almost not common, and in fact it gives an advantage over a kyanite, which is usually bent by metal sheets, since it does not absolutely deform the bent part.
In skilled hands, this device givesthe ability to ideally produce such complex structures as chassis, shells, casings, neatly connect the sheets in the fold and, accordingly, improve the presentation of products.
Before creating a sheet by yourself,It is necessary to understand what parts it consists of. This base, clamp and crimp punch with a lever-lever. The base itself is made of a channel No.14, the clamp is made of channel No.10, and the crimping punch is made from corner No. 8. This is enough to design a tool suitable for the job of a roofer.
Distance between the axes of the two clamping boltsshould be equal to the length of the metal sheet for the roof. Profiles of the chosen sizes will allow to work with sheets in length to 2 meters. The base is mounted on welded legs of the gantry type with struts. In the middle of the clamping profile, a pair of holes are drilled, the distance between each of them and the corresponding end of the channel is 5 centimeters.
Separate attention is worthy of the handle-lever, whichis equipped with a self-made sheet bending machine. With your own hands, it's easiest to make it from a bar of reinforcement at least 2.5 centimeters in diameter, welding it to the corner. To ensure that the punch is stable in its upper position, the handle is provided with a bend. If there is such a need, you can weld metal rods as additional loads to the lever.
At the ends of the workpieces of the clamp, base, punchand a chamfer depth of 1 and a length of 5 centimeters is taken along the edge. After that, axes from steel bars of diameter of two centimeters are welded to the punch. The axis during welding should coincide in a direction with the edge of the corner. They are installed on the cheeks of scraps of steel sheet thickness of 1-1.5 centimeters.
Далее необходимо собрать листогиб своими руками.A sheet of soft metal is laid on the base for this, and a clamp fixed temporarily with clamps is drawn on top. The crimp punch is located on top, its vertical shelf must be in contact with the clamp with its entire surface. The cheeks are put on the axle and welded to the base with the help of electric welding.
A trial bending is performed, during which the position of the upper clamp relative to the base is checked and adjusted. If everything is correct, the construction is welded.
Then holes are drilled in the basea diameter of 1.4 centimeters, and they cut the thread M16. Screwed bolts are tightened there and fixed by welding. As a squeezing protrude the valve springs that are available in the car engine.
Use a leaf bend with your own hands is not at allit is difficult: the lever of the lever is moved to the highest position, then the clamping nuts are loosened. The clamp is lifted above the base by the force of the springs, a gap is formed below it. In it, it is necessary to skip the folded part of the sheet and set it at a given distance from the fold line so that this line coincides with the edge of the base. The clamping nuts are tightened, and the lever-lever is moved to the lowest position. As a result of these actions, the sheet bends.
Efforts that you will spend are notmake hand-made sheet bending with your own hands, quickly vindicated. After all, now you can perfectly carry out roofing work without attracting hired strength. And when the need for a machine tool disappears, it can be sold or leased. By the way, it can also produce bent profiles, which are necessary for the construction of greenhouses, greenhouses, high beds and other structures of this type.
