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ELID成形磨削实验研究与表面粗糙度预测
张宇鑫, 任成祖, 左明泽, 王志强
天津大学机构理论与装备设计教育部重点实验室, 天津 300350
摘要:
为了探究ELID成型磨削中磨削参数和电解参数对表面粗糙度的影响规律,基于未变形切屑厚度模型,考虑砂轮上磨粒出刃高度的随机性以及ELID磨削中氧化膜的影响,建立了针对ELID磨削的表面粗糙度预测模型。单因素实验研究了ELID成形磨削电源参数对表面粗糙度的影响规律,并探讨了电解电流与氧化膜厚度之间的关系。全因子实验以工件转速、砂轮转速和进给切深为影响因素,研究了磨削参数对表面粗糙度的影响规律,并对预测模型进行了验证。结果表明:磨削参数中,其他条件一定时,表面粗糙度随砂轮转速的增大而减小,随工件转速和切深的增大而增大;同时对于粗糙度的预测误差达到了8.75%,预测模型有效可靠。
关键词:  ELID磨削  切屑厚度  表面粗糙度模型  氧化膜
DOI:10.12044/j.issn.1007-2330.2018.06.005
分类号:TH161.14
基金项目:天津市自然科学基金重点项目(15JCZDJC39500);国家自然科学基金(51675377)
Experimental Study and Prediction of Surface Roughnessin of ELID Form Grinding
ZHANG Yuxin, REN Chengzu, ZUO Mingze, WANG Zhiqiang
Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, Tianjin University, Tianjin 300350
Abstract:
In order to explore the influence of grinding parameters and electrolysis parameters on surface roughness in ELID grinding process, the surface roughness prediction model of ELID grinding was established based on the undeformed chip thickness model by taking into account the randomness of the grit height at the grinding wheel and the influence of the oxide layer in the ELID grinding. Single factor experiments were carried out to study the influence of the parameters of ELID grinding on the surface roughness, and the relationship between the electrolytic current and the thickness of the oxide layer was discussed. In the full factor experiment, the influence of the grinding parameters on the surface roughness was studied by taking the workpiece speed, the grinding wheel speed and the feed depth as the influencing factors, and the prediction model was verified. The results show that in the grinding parameters, when the other conditions are fixed, the surface roughness decreases with the increase of the wheel speed, and increases with the increase of the workpiece speed and the depth of the cutting.At the same time, the prediction error of the roughness is 8.75%, the prediction model is valid and reliable.
Key words:  ELID grinding  Chip thickness  Model of surface roughness  Oxide layer