精加工细晶粒纯铜材料的切削力研究  

Research on Cutting Force of Pure Copper with Fine Grains in Finish Machining

作　　者：薛成 鞠康 段春争[1] Xue Cheng;Ju Kang;Duan Chunzheng(School of Mechanical Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China)

机构地区：[1]大连理工大学机械工程学院,辽宁省大连市116024

出　　处：《工具技术》2020年第10期8-12,共5页Tool Engineering

基　　金：国防基础科研科学挑战计划项目(JCKY2016212A506-0102)。

摘　　要：为了探究精加工T2纯铜材料的切削力特性,对细晶粒度为20μm的T2纯铜材料进行了切削力理论建模,分析了切削参数和刀具几何参数对切削力的影响,并通过切削试验对其模型进行验证。研究表明:在精车过程中,切削参数对切削力的影响顺序依次为:背吃刀量>进给量>切削速度;增加刀具后角和减小刀尖圆弧半径,可以减小刀具与工件的挤压和摩擦。因此,精加工细晶粒纯铜材料时,可以通过减小刀尖圆弧半径和增加刀具后角来减小切削力,提高工件表面质量。In order to investigate the cutting force characteristics of T2 Pure copper material,theoretical modeling of cutting force for T2 pure copper material with fine grain size of 20μm is conducted.The influence of cutting parameters and tool geometry parameters on the cutting force is analyzed,and the model is verified by cutting test.The research results show that the influence of cutting depth on cutting force is significant in precision turning,and the influence of feed rate and the cutting speed on cutting force are less significant sequentially.Increasing the relief angle and decreasing the tip radius of the tool will reduce the extrusion and friction between the tool and the workpiece and reduce the cutting force.Therefore,the cutting force can be decreased by reducing the tip radius and increasing the relief angle of the tool,and the surface quality of the workpiece can be also improved.

关 键 词：T2纯铜材料 切削力 后角 刀尖圆弧半径 

分 类 号：TG506.7[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]