航空电机电器生产中,冲压件颇多。其冷冲模的质量、寿命和制造周期一直是冲压件生产翻身仗的大拦路虎。而冷冲模的间隙则是直接影响冲压件质量和模具寿命的一个重要工艺参数。长期以来,由于沿用苏联的间隙表,使模具制造困难,周期长,寿命短,冲件质量差,严重影响生产。近几年,有关厂、所进行了加大冲裁模间隙的试验,有的单位并已应用于生产。通过实践,不仅获得了合格的冲件,并发现冲下的孔比凸模大,冲件比凹模小,从而减小了冲裁力和卸料力,减少了磨损,大大延长了冲裁模的寿命。因加大了间隙,冲件落料畅快,可以采用直刀口、全刀口凹模,便于采用数控线切割工艺加工模具,大大缩短了模具 Aero-electrical production, stamping a lot. The quality of its cold die, life expectancy and manufacturing cycle stamping production has been a turning point in the big stumbling block. The die gap is a direct impact on the quality of stamping parts and die life is an important process parameters. For a long time, due to the use of the Soviet Union clearance table, the mold manufacturing difficulties, long cycle, short life expectancy, poor quality stampings, seriously affecting the production. In recent years, the plant, the test carried out to increase the blanking gap, and some units have been used in production. Through practice, not only obtained qualified punch, and found that punched holes than the punch, punch smaller than the die, thereby reducing the punching force and discharge force, reducing wear and tear, greatly extending the punching Die life. Due to increased clearance, punch blazing fun, you can use straight knife mouth, all-edge die, easy to use CNC wire cutting process mold, greatly reducing the mold