磨削参数对硬质合金刀片圆弧表面锯齿的影响  

Effect of Grinding Parameters on Saw Tooth of Arc Surface of Cemented Carbide Blades

作　　者：黄向明[1] 刘涛 曾滔 王友伟 汤爱民 袁美娟 李尧 HUANG Xiangming;LIU Tao;ZENG Tao;WANG Youwei;TANG Aimin;YUAN Meijuan;LI Yao(College of Mechanical and Vehicle Engineering,Hunan University,Changsha,Hunan 410082;Zhuzhou Cemented Carbide Cutting Tools Co.,Ltd.,Zhuzhou,Hunan 412000)

机构地区：[1]湖南大学机械与运载工程学院,湖南长沙410082 [2]株洲钻石切削刀具股份有限公司,湖南株洲412000

出　　处：《湖南大学学报（自然科学版）》2022年第4期160-167,共8页Journal of Hunan University:Natural Sciences

基　　金：国家自然科学基金资助项目(51975203);湖南省自然科学基金资助项目(2021JJ30113)。

摘　　要：为了控制硬质合金刀片圆弧刃处的表面质量,通过分析单颗磨粒与工件的接触长度和最大未变形切屑厚度的关系,建立了其磨削力学模型.基于正交试验的方法,对该硬质合金刀具进行不同磨削参数的加工实验,并采用VHX-600超景深光学显微镜等观测仪器对刀具圆弧面的锯齿深度和表面粗糙度进行观测.结合圆弧刀刃的磨削力学模型和实验加工结果,并基于锯齿成型机理分析了不同磨削参数、刀片材料以及结构等对刀片圆弧的锯齿及粗糙度的影响规律.结果表明,提高砂轮转速、降低圆弧转动速度、减小磨削深度、控制刀片材料的质量、合理设计刀片结构可以提高刀片圆弧处的表面质量,提高刀具的耐用度.砂轮磨削圆弧转动速度为24 m/s、圆弧转动速度为8°/s、磨削深度为0.05 mm时磨削效果较佳,可以获得较小的磨削力、锯齿深度及表面粗糙度.In order to control the surface quality of arc edge of the cemented carbide blade,a grinding mechani⁃cal model was established by analyzing the relationship between the contact length of a single abrasive particle and the work-piece and the maximum thickness of undeformed chip.Based on the orthogonal experiment method,the ma⁃chining experiments of the carbide tool with different grinding parameters were carried out,and the saw tooth depth and surface roughness of the tool arc surface were observed by VHX-600 ultra-deep field optical microscope and other observation instruments.Based on the grinding mechanical model and experimental machining results of the arc blade,as well as the saw tooth forming mechanism,the saw tooth and roughness of the arc blade affected by differ⁃ent grinding parameters,blade material and structure were analyzed.The results show that the surface quality and tool durability can be improved by increasing wheel speed,reducing arc rotation speed,reducing grinding depth,con⁃trolling the quality of blade material and designing blade structure reasonably.The grinding effect is better when the grinding speed of the wheel is 24m/s,the speed of the wheel is 8°/s,and the grinding depth is 0.05mm,and mean⁃while,the grinding force,serrations and surface roughness are smaller.

关 键 词：硬质合金刀片 磨削力 磨削参数 圆弧面 锯齿 表面粗糙度 

分 类 号：TH162[机械工程—机械制造及自动化]