垂直度对丝锥折断的影响及改善对策  

The Influence of Verticality on the Breaking of Tap and Its Improving Measures

作　　者：崔明军[1] 马吉建[1] CUI Ming-jun;MA Ji-jian(Guangxi Institute of Mechanical and Eelectrical Ttechnology,Nanning 530007,China)

机构地区：[1]广西机电职业技术学院,南宁530007

出　　处：《装备制造技术》2020年第11期86-88,92,共4页Equipment Manufacturing Technology

基　　金：广西中青年教师基础能力提升项目2019年度课题,车床及磨床安全操作性能提高的研究与探索(课题编号2019KY1287,主持人:崔明军)。

摘　　要：对手动丝锥攻丝加工螺纹易发生丝锥折断的事故的分析,找出了丝锥折断的主要原因,是丝锥的轴线与工件的预钻孔轴线不同心、丝锥倾斜不垂直,同时得到:丝锥倾斜,造成两边的切削层厚度不同,单侧切削层厚度过大,丝锥底部被工件轴向切削层阻挡,产生强大的轴向阻力,当超过丝锥的抗扭强度时,就造成丝锥的断裂、折断。从而,提出了防止丝锥折断的对策主要依靠预防,也可采用一种辅助丝锥找垂直的装置。This paper analyzes the accident that the tap is easy to break in manual tap tapping,and finds out the main reason of the tap breaking,which is that the tap axis is not concentric with the pre drilling axis of the workpiece,and the tap tilt is not vertical.At the same time,it is obtained that the thickness of the cutting layer on both sides is different,the thickness of the unilateral cutting layer is too large,and the bottom of the tap is blocked by the axial cutting layer of the workpiece When the axial resistance exceeds the torsional strength of the tap,the tap will break and break.Therefore,it is suggested that the measures to prevent the tap from breaking mainly rely on the prevention,and a device to assist the tap to find the vertical position can also be used.

关 键 词：丝锥折断 丝锥倾斜不垂直 辅助丝锥找垂直装置 丝锥垂直套 防止丝锥折断装置 

分 类 号：TG62[金属学及工艺—金属切削加工及机床]