M22机用丝锥产生裂纹的原因分析与探讨  

Analysis and Discussion of M22 Machine Taps Crack

作　　者：张林 张振刚 翟彦召 刘丽荣 

机构地区：[1]河南一工钻业有限公司

出　　处：《工具技术》2015年第3期53-54,共2页Tool Engineering

摘　　要：在M22机用丝锥蒸汽处理后发现有批量的产品存在裂纹,经过分析认为:裂纹产生于机加工的磨槽工序,磨削过程中产生了加工变质层,导致产生了磨削应力。在机加工后,磨削应力转变成残余磨削应力,磨削应力以及残余磨削应力的本质是拉应力,应力在丝锥牙根处集中导致裂纹的产生和扩展。After steam treatment of the M22 machine taps, there was found a batch of products have the crack, with analyse and conside that the crack was produced in machining＇ s grinding groove process. In the process of grinding, the deteriorative layer was produced, and which lead to the grinding stress. After the machining process, grinding stress was became into residual stress, both of them were the essence of the tensile stress. Stress concentration at tap mot, leading to crack initiation and extensions.

关 键 词：机用丝锥裂纹 磨削 磨削残余应力 拉应力 应力集中 开裂 

分 类 号：TG713[金属学及工艺—刀具与模具]