难加工材料微量润滑及低温辅助切削加工技术研究

Research on Minimum Quantity Lubrication and Cryogenic Assisted Cutting of Difficult-to-cut Materials

随着绿色制造已成为世界制造业未来的发展趋势,清洁切削是实现机械加工环境、操作人员和生产资源和谐发展的有效途径。本文综述了近年来上海交通大学在难加工材料微量润滑及低温辅助加工技术方面的研究,概括了微量润滑和低温辅助等清洁加工方式在典型难加工材料中的应用可行性及效果,具体内容主要包括:阐述了微量润滑及低温辅助切削加工的工作原理;采用有限元方法对微量润滑流场分布进行仿真,获取了工作参数对冷却润滑效果的作用规律;表征了不同微量润滑和低温辅助过程中的刀-屑摩擦磨损特性;系统研究了冷却润滑条件对不同难加工材料加工过程中切削和刀具磨损机理的作用,揭示了低温辅助和微量润滑环境对典型难加工材料切削性能的改善机制;研究了不同加工方式冷却润滑条件对加工表面完整性创成的影响。

As green manufacturing has become the future development trend of the world′s manufacturing industry, clean cutting is an effective way to realize the harmonious development of machining environment, operators and production resources.This paper summarizes the research work of Shanghai Jiao Tong University in MQL and CMQL machining technology of difficult-to-cut materials in recent years, and concludes the application feasibility and effect of clean machining methods in machining the difficult-to-cut materials.The specific contents mainly include: expounds the working principle of MQL and CMQL.The flow field distribution of MQL is simulated by finite element method, and the law of working parameters on cooling and lubrication effect is obtained.The characteristics of tool-chip friction and wear in different MQL and CMQL processes are characterized.The effects of cooling and lubrication conditions on cutting response and tool wear mechanism in the machining process of different materials are systematically studied, and the improvement mechanism of CMQL on the cutting performance of typical difficult-to-cut materials is revealed.The effects of cooling and lubrication conditions of different machining methods on the formation of machined surface integrity are studied.