一、引言 科学技术的飞速发展,加速了机械产品的更新换代。缩短了机械产品的生命期,为了适应产品多样化时代的客观形势,必须改变传统的产品设计方法和生产准备方法。就机械加工领域的工艺准备而言,就必须改变专用工艺、专用工装的工艺准备方法。其中尽量减少或取 I. INTRODUCTION The rapid development of science and technology has accelerated the upgrading of mechanical products. Shorten the life of mechanical products, in order to adapt to the objective situation of product diversification era, we must change the traditional product design methods and production preparation methods. In terms of process preparation in the field of machining, it is necessary to change the process preparation method for the special process and the special tooling. Which minimize or take