硬质合金数控车刀片加工铝合金断屑性能实验研究  

Experimental Research on Chip Breaking Performance of Cemented Carbide CNC Turning Inserts for Machining Aluminum Alloy

作　　者：赵克斌 何云[1] 雷学林 曹拯 Zhao Kebin;He Yun;Lei Xuelin;Cao Zheng(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]华东理工大学机械与动力工程学院,上海200037

出　　处：《硬质合金》2022年第4期275-280,共6页Cemented Carbides

摘　　要：利用断屑槽等效圆的概念建立了判断车刀片断屑槽断屑效果的模型,得到了断屑槽等效圆半径的计算公式。选用具有不同断屑槽参数的硬质合金刀片对7075铝合金进行干式车削加工实验,当切削速度为240 m/min,切削深度2 mm,进给量0.25mm/r时,等效圆半径小于等于1.03 mm的刀片可获得C形屑,等效圆半径大于1.03 mm的刀片则产生连续切屑,验证了用该模型判断刀片断屑性能的合理性。同时发现断屑槽对切屑的约束效果也对断屑性能产生一定影响,可为数控刀片断屑槽的优化和改进提供一定的理论参考。With the concept of the equivalent circle of a chip breaking groove, a model for judging the chip breaking effect of the chip breaking groove of a turning insert was built, and the calculation formula for the equivalent circle radius of the chip breaking groove was obtained. The dry turning experiment of the 7075 aluminum alloy was carried out with cemented carbide inserts of different chip-breaking-groove parameters. When the cutting speed is 240 m/min, with the cutting depth of2 mm and the feed rate of 0.25 mm/r, C-shaped chips can be obtained using inserts with the equivalent circular radius less than or equal to 1.03 mm, and the inserts with an equivalent circular radius greater than 1.03 mm can produce continuous chips, which verifies the rationality of the chip-breaking performance judgment of the inserts by this model. Meanwhile, it is found that the restriction effect of a chip breaking groove on chips also has a certain impact on chip breaking performance,which can provide a certain theoretical reference for the optimization and improvement of the chip breaking grooves of computerized numerical control(CNC) inserts.

关 键 词：硬质合金 刀片 断屑槽 断屑性能 

分 类 号：TG51[金属学及工艺—金属切削加工及机床]