1.加工原理对金属施加压力后,使其性质发生变化。即脆性减弱,塑性变形能提高。对开始剪切的各种加工形成有利条件。精冲加工法就是按此原理,使用特种结构的模具和适合于加工目的专用压力机进行冲压加工的一种精密加工法。 2.精冲模具由凹模和带环状凸起压板对被加工材料加压,且在受反向压力条件下凸模进入凹模,冲 1. Processing Principle Pressure on the metal, so that the nature of change. That is, weakened brittleness, plastic deformation can be increased. Various conditions for starting the cutting process are favorable. Fine blanking method is based on this principle, the use of special structure of the mold and suitable for processing purposes dedicated press for stamping a precision machining method. 2. The fine blanking die by the die and ring raised platens to be processed material pressure, and under the conditions of reverse pressure punch into the die, punch