M14直槽机用丝锥磨削开裂原因分析与探讨  

Analysis and Discussion on Grinding Cracking of M14 Straight Groove Machine Screw Tap

作　　者：张林 王振宇 翟彦召 刘阳阳 Zhang Lin;Wang Zhenyu;Zhai Yanzhao;Liu Yangyang;Henan Yigong(Drilling Industry Co.,Ltd.,Xinxiang,Henan 453002,China)

机构地区：[1]河南一工钻业有限公司,河南省新乡市453002

出　　处：《工具技术》2023年第7期96-99,共4页Tool Engineering

摘　　要：M14直槽机丝在磨槽后易出现批量开裂,从断口形态、生产过程、金相组织、非金属夹杂物以及磨削应力等不同角度进行分析,探究导致机丝磨削开裂的各种因素。原材料中N含量偏高会导致耐磨性增加,O含量高会导致夹杂物增多,磨削烧伤会导致磨削应力大;磨削应力在牙底集中,当超过材料的断裂极限时会导致产品出现批量开裂。Batch cracking may be occurred after the grooving of M14 straight grooving machine screw tap.Different factors on screw tap grinding cracking, such as fracture morphology, production process, metallographic structure, non-metallic inclusions and grinding stress are analyzed.The high nitrogen content in raw materials leads to the increase of wear resistance, the high oxygen content leads to the increase of inclusions, and the grinding burn leads to high grinding stress.The grinding stress is concentrated at the tooth bottom, exceeding the fracture limit of materials, resulting in batch cracking of products.

关 键 词：高速钢 机丝 磨削 开裂 热处理 夹杂物 磨削应力 

分 类 号：TG659[金属学及工艺—金属切削加工及机床] TH161[机械工程—机械制造及自动化]