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我厂原生产定位凸轮尺寸精度要求高,齿形端面光洁度为?5以上,材料为10号钢,要求表面渗碳淬火,硬度为HRC40—45,原工艺采用棒料φ26×1000,车加工毛坯,采用一般光洁冲切整修模冲切外缘。见图1。零件表面不平整,端面塌角厉害,毛刺大,随后渗碳淬火,硬度为HRC40～45,在部装时配钻一止动销孔φ2,由于表面硬度较硬,操作不安全,容易损坏钻头,这样往返工序较多,质量较差。后将原采用10号钢材料更改为45号钢材料,采用棒料φ30×1000,车加工毛坯,保持凸台及圆盘厚度
I plant the original production of high positioning cam accuracy requirements, toothed end surface finish of? 5 or more, the material is 10 steel, requiring surface carburizing and quenching, hardness HRC40-45, the original process using bar stock φ26 × 1000, machining rough , Use the general smooth punching renovation die punching the outer edge. see picture 1. Part surface is not smooth, sharp edge collapse, burr, and then carburizing and quenching, the hardness of HRC40 ~ 45, equipped with a hole in the sales stop pin φ2, due to the hard surface hardness, the operation is not safe, easy to damage the drill, This round-trip process more, poor quality. After the original No. 10 steel material changed to No. 45 steel material, the use of bar material φ30 × 1000, car processing rough, keep the boss and disc thickness