非一致曲率表面下的气压砂轮磨粒剪胀及加工试验研究  

Experimental Study on Abrasive Dilatancy and Processing of PneumaticGrinding Wheels under Non-uniform Curvature Surfaces

作　　者：石梦 李卓 曾晰[1] 计时鸣[1] 黄鹏程[2] 郑倩倩 SHI Meng;LI Zhuo;ZENG Xi;JI Shiming;HUANG Pengcheng;ZHENG Qianqian(Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology of Ministry of Education,Zhejiang University of Technology,Hangzhou,310023;Mechanical and Electrical Engineering of Jinhua Polytechnic,Jinhua,Zhejiang,321017;Hangzhou Cigarette Factory,China Tobacco Zhejiang Industrial Co.,Ltd.,Hangzhou,310024)

机构地区：[1]浙江工业大学特种装备制造与先进加工技术教育部重点实验室,杭州310023 [2]金华职业技术学院机电工程学院,金华321017 [3]浙江中烟工业有限责任公司杭州卷烟厂,杭州310024

出　　处：《中国机械工程》2021年第10期1191-1199,共9页China Mechanical Engineering

基　　金：国家自然科学基金(51875526);浙江省自然科学基金(LY18E050023)。

摘　　要：针对软固结磨粒气压砂轮在加工异形曲面时,工件所受的切削力以及接触区内磨粒速度因工件曲率发生变化,导致工件不同曲率处材料去除量不均匀的问题,基于修正的Rowe剪胀理论建立砂轮切削力模型,提出了非一致曲率表面下修正的气压砂轮材料去除模型。通过EDEM软件建立了软固结磨粒气压砂轮模型,分析了砂轮下压量为1.5 mm时工件曲率对接触力以及接触区内磨粒速度的影响。搭建气压砂轮加工试验平台,通过光整加工试验验证修正的材料去除模型。研究结果表明:修正的材料去除模型平均绝对值误差为0.095,而原始的材料去除模型平均绝对值误差为0.291,说明修正的材料去除模型可以用于气压砂轮抛光过程中的定量分析,且工件加工表面划痕明显减少。The cutting forces and the abrasive velocity in the contact area of the workpiece were changed when the SCA pneumatic grinding wheel was used to process the irregular curved surface.In order to solve the problems of uneven material removal at different curvatures of the workpieces,the modified Rowe dilatancy theory was proposed to establish the grinding wheel cutting force model,and the modified material removal model of the pneumatic grinding wheel under the non-uniform curvature surfaces was proposed herein.The model of SCA pueumatic grinding wheel was established by EDEM software.The influences of workpiece curvatures on contact forces and abrasive velocity in contact areas were analyzed when the amount of compression of grinding wheel was as 1.5 mm.The modified material removal model was verified by finishing experiments.The results show that the modified material removal model MAE(mean absolute error)is as 0.095,while the original material removal model MAE is as 0.291,The revised material removal model may be used for quantitative analysis in the SCA wheel polishing processes,scratches on the machined surfaces of the workpiece are significantly reduced.

关 键 词：软固结磨粒群 非一致曲率 剪胀效应 材料去除模型 

分 类 号：TG580[金属学及工艺—金属切削加工及机床]