Shears Classification: General shears can be divided into: foot-(human), mechanical, hydraulic swing, hydraulic brake type.
Shearing is through the movement of the blade and the lower fixed blade, the blade clearance with justice, sheet metal of various thickness shear force applied to the required size of plate fracture by separation.Roll forming machine  
The principle and structure shears shears used to cut straight edges of the sheet metal blank. Shearing process should be able to guarantee Shears shearing surface is linear and parallel requirements, and to minimize sheet distortion, in order to obtain high-quality parts.
Shearing machines are forging a main role is to metal processing industry.Roll former
The products are widely used together: light industry, aviation, shipbuilding, metallurgy, instrumentation, electrical appliances, stainless steel products, steel construction and decoration industry
Shears safe operation of the order: 1, control before the wear tight-fitting suits, cuff fastening, jacket hem can not open, not in the starting of the machine next to the clothing, change clothes off, or cloth around the body, to prevent twist injury. Must wear a helmet, braided cap should be placed, can not wear skirts, slippers.Roll forming
2, the shearing machine manipulating the staff necessary to understand the main structure, function and use.
3, the machine used to cut material thickness combined rating for the machine tools of various steel, copper, aluminum and non-metallic sheet materials, but there is no need to hard-marks, welding slag, slag, weld material, not allow super- thickness.
4, the use of this machine: a, according to the thickness of the material being cut, adjust the blade gap.
b. According to adjust the width of the material being cut by die or fixture.
C, before manipulation tool for 1 - 3 times air travel, only after the implementation of the normal shear work.
5, use the machine does not run properly if found, should immediately curb the power down to check.
6, adjusting the machine, necessary to intercept the power, moving parts should pay attention to the safety of hand.
7, departments should keep a machine tool lubrication, oil filling the class work should be manipulated once on the move every six months by a mechanic oil bearing parts of a filling.