一、前言 型腔模具的加工一直是电器、仪表等行业长期来存在的老大难问题。采用机加工和钳工这套老的工艺路线,模具制造周期长,劳动生产率低,工人的劳动强度也很大。如一套中小型继电器外壳胶木模具的制造周期竟达3～4个月,而且还存在因热处理变形而报废的危险,这给新产品的试 First, the foreword Cavity mold processing has been a long-standing problem of electrical appliances, instruments and other industries. The use of machining and fitter the old process line, the mold manufacturing cycle is long, labor productivity is low, the labor intensity of workers is also great. Such as a small relay shell bakelite mold manufacturing cycle as many as 3 to 4 months, but there is also the risk of scrap due to heat treatment deformation, which gives the test of new products