刀具前角及切削厚度对SiC_(p)/Al切削表面损伤形成的影响  

Influence of Tool Rake Angle and Cutting Thickness on Formation of SiC_(p)/Al Cutting Surface Damage

作　　者：吴子乾 段春争[1] 杨龙允 郭俊宏 田晓东 王超 Wu Ziqian;Duan Chunzheng;Yang Longyun;Guo Junhong;Tian Xiaodong;Wang Chao(School of Mechanical Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China;不详)

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》2025年第3期43-49,共7页Tool Engineering

基　　金：贵州省中央引导地方科技发展资金项目(黔科合中引地[2025]012)。

摘　　要：铝基碳化硅复合材料(SiC_(p)/Al复合材料)在切削加工过程中极易出现表面损伤,阻碍其进一步应用。为探究刀具前角及切削厚度对表面损伤形成过程的影响,建立考虑SiC_(p)/Al微观结构的切削仿真模型,并通过正交车削实验验证,结合实验分析不同前角及切削厚度对损伤区域的应力场分布及表面损伤形成的影响。研究表明:本文所建立的仿真模型能很好地描述切削过程,将实验与仿真的主切削力对比,平均值最大偏差为16.92N,相对误差为13.67%。在刀具正前角切削过程中,易出现颗粒的二次损伤现象,造成更严重的表面损伤,而负前角切削所造成的损伤较小,表面质量优于正前角。小切削厚度造成的损伤明显小于大切削厚度的损伤,且得到的表面质量更好。During the machining of aluminum-based silicon carbide composite materials(SiC_(p)/Al composites),surface damage is a common issue that hinders their further application.To investigate the influence of tool rake angle and cutting thickness on the process of surface damage formation,this study first establishes a cutting simulation model considering the microscopic structure of SiC_(p)/Al.The model′s accuracy is validated through orthogonal turning experiments.Subsequently,through a comparative analysis of experimental and simulated data,the study explores the effects of different rake angles and cutting thicknesses on the stress field distribution in the damage zone and the resultant surface damage.The research indicates that the simulation model developed in this study effectively describes the cutting process.Comparisons with experimentally obtained primary cutting forces showed a maximum average deviation of 16.92 N and a relative error of 13.67%.In the process of positive rake angle cutting,secondary damage to particles is prone to occur,resulting in more severe surface damage,whereas negative rake angle cutting causes less damage,yielding superior surface quality.Damage caused by small cutting thickness is significantly less than that caused by large cutting thickness,and better surface quality is achieved.

关 键 词：刀具前角 切削厚度 SiC_(p)/Al复合材料 切削表面损伤 有限元仿真 

分 类 号：TH164[机械工程—机械制造及自动化]