Stamping is the use of high speed punch and die pressure on the material, make it in a certain shape to produce a certain size of products, products produced after without additional processing. This kind of mode of production is mainly used for metal coil forming. Stamping under the condition of the mass production, although the punch and die money into high-speed, high production requirements, but in comparison with the traditional way to (such as forging, casting, welding, mechanical machining, etc.), the advantages of high speed punch more obvious.