七十年代以来由于科学技术的突飞猛进,新产品发展迅速,品种规格繁多,产品更新换代周期日益缩短,中小批生产在整个机械制造业中的比重愈来愈大。据CIRP(国际生产工程研究会)在西欧机械制造业中的统计: 单件生产占35％;小批生产占52％; 大批生产占8%;大量生产占5％。作为产品主要工艺装备之一的夹具,为 Since the seventies, due to the rapid development of science and technology, the rapid development of new products, the wide variety of specifications, the increasingly short cycle of product replacement, and the increasing proportion of small and medium-sized batches in the entire machinery manufacturing industry. According to CIRP (International Society for Manufacturing Engineering) Statistics in the Western European machinery manufacturing industry: 35% for single-piece production, 52% for small-batch production, 8% for mass production and 5% for mass production. As one of the main product of the fixture, for