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汽车模具高速切削加工技术


     高速切削加工技术在国内外汽车模具制造行业得到了广泛的应用,并且已取得了巨大的效益,但是高速切削加工的机理和相关理论至今仍不完善,针对汽车模具的高速切削数据库尚未建立。国内外企业选择高速切削刀具参数和高速切削加工参数的方式仍以传统的“试切”法和“经验”法为主,在加工某一新型材料时,往往需要使用多种刀具进行重复切削试验,研究分析刀具的磨损、破损方式及其原因,从中找出一组最佳的刀具材料和加工参数,如此反覆多次,盲目性大,并且浪费大量的人力、财力和资源。而针对特种材料如合金铸铁、高强度合金钢、超级合金(如钛合金)等材料的高速切削加工,如何根据材料特性选择合适的切削刀具,如何设计合理的切削参数,目前仍在研究和发展中。
  我国有关汽车模具高速切削加工技术的研究起步较晚。近年来,众多模具企业相继从美国、德国、法国和日本等国家购买了大量高速加工设备及切削刀具,并在实践中摸索汽车模具高速切削加工的工艺技术,取得了一些成功经验。但是,一方面,引进设备不等于引进技术。高速切削尤其是大型汽车覆盖件模具的高速切削方面,没有成功的经验可供借鉴,怎样使引进的设备尽快发挥出应有的作用是摆在企业管理者和工程技术人员面前的一大课题;另一方面,技术人员在工作中边学习边应用,摸索和积累了一定的高速切削加工实例、工艺参数和工作经验,怎样将这些宝贵的经验和教训总结保存供其他技术人员借鉴、避免多走弯路也是一项难题。

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