改进双刃枪钻的蠕铁加工试验研究  

Experimental Study on Vermiculariron Machining with Improved Double-flute Gun Drill

作　　者：王威舒 张伟[1] 李铸宇[2] 刘涛[2] 崔雪飞 Wang Weishu;Zhang Wei;Li Zhuyu;Liu Tao;Cui Xuefei(School of Mechanical Engineering and Automation,Dalian Polytechnic University,Dalian,Liaoning 116034,China;不详)

机构地区：[1]大连工业大学机械工程与自动化学院,辽宁省大连市116034 [2]大连工业大学,辽宁省大连市116034

出　　处：《工具技术》2021年第3期68-72,共5页Tool Engineering

摘　　要：加工蠕墨铸铁时,由于切削温度过高、切削力过大,易导致孔加工质量变差。本文就此问题进行了双刃枪钻钻削蠕墨铸铁的试验研究,在双刃枪钻的前刀面增加一个断屑槽,使其变为正前角,以改善其切削性能。利用直接法建立断屑槽的数学模型,分别对比带断屑槽的双刃枪钻和不带断屑槽的普通双刃枪钻在钻削蠕墨铸铁时产生的铁屑,并在此基础上,通过改变断屑槽的槽宽LBn和优化断屑槽的几何参数,在保证孔加工质量的同时提高生产效率。During the machining of CGI,the cutting temperature is too high and the cutting force is too large,which results in the poor quality of hole machining.To solve the problem,the drilling experiment with a double-flute gun drill is carried out.A chip breaker is added to the double-flute gun drill on the rake face,which changes its rake angle from 0°to a positive one and enhances its cutting performance.The direct modelling method is used to establish the mathematical model of the chip breaker,and the normal double-flute gun drill and the double-flute gun drill with chip breaker are compared when drilling CGI.On this basis,the width of the chip breaker and other geometric parameters are optimized to ensure hole quality and improve production efficiency at the same time.

关 键 词：断屑槽 双刃枪钻 蠕墨铸铁 

分 类 号：TG937[金属学及工艺—钳工工艺] TH162[机械工程—机械制造及自动化]