冷镦产品表面裂缝问题,一直是以冷镦为主要生产工艺的关键质量问题,它严重地影响了冷镦工艺优越性的发挥。因冷镦工艺能提高劳动生产率和材料利用率,才用冷镦工艺代替切削工艺。自动冷镦机价格昂贵,若因产品裂缝降低了开动率,设备的成本就无法得到偿付。这样,冷镦工艺的优越性就得不到充分发挥,所以,解决冷镦产品表面裂缝问题,是一 Cold-heading product surface cracks, cold heading has been the main production process for the key quality problems, it has seriously affected the superiority of the cold heading process play. Cold forging process can improve labor productivity and material utilization, cold heading process instead of cutting process. Automatic cold heading machine is expensive, if the product cracking due to lower start-up rate, the cost of the equipment can not be paid. In this way, the superiority of the cold forging process can not get full play, so, to solve the problem of surface cracks in cold heading products, is a