摘要
316L奥氏体不锈钢因其优良的力学性能和耐腐蚀性在航空航天领域被广泛应用,但其加工硬化现象严重,刀–屑接触环境恶劣,导致刀具寿命严重缩短,影响加工效率。本文将通过有限元仿真与试验相结合的方法研究限制接触刀具对切削过程中力与热特性的影响。通过建立限制接触切削的有限元仿真模型,探究加工参数和限制接触参数对切削性能的影响,并阐明了变限制接触结构在切削过程中的作用机理。结果表明,变限制接触结构能有效减小切削力与切削温度,并改善奥氏体钢的切削性能。其中梯形限制接触结构改善切削性能效果最好。该结果在切削试验中得到验证,并证明了有限元仿真的可靠性,为新型限制接触刀具结构的优化提供理论基础。
316L austenitic stainless steel is widely used in aerospace because of its excellent mechanical properties and corrosion resistance.However,work hardening and harsh tool-chip contact environments lead to decreased tool life and machining efficiency.In this paper,finite element simulation and cutting experiments of restricted contact cutting were constructed to explore the effect of restricted contact tools on the force and thermal characteristics of the machining process.The effect of cutting and restricted contact parameters was investigated through the establishment of the finite element simulation model of restricted contact cutting,and the action mechanism of variable restricted contact structure was clarified.It indicated that the variable-length restricted contact structure can effectively reduce the cutting force and temperature and improve the cutting performance,among which the trapezoidal restricted contact structure has the best effect on improving cutting performance.The result,which was validated by cutting experiments and proved the reliability of the finite element simulation,offers the basis for optimizing the structure of the restricted contact tool.
作者
李梓钊
邓文君
庞学勤
LI Zizhao;DENG Wenjun;PANG Xueqin(South China University of Technology,Guangzhou 510641,China)
出处
《航空制造技术》
CSCD
北大核心
2023年第5期36-46,共11页
Aeronautical Manufacturing Technology
关键词
限制接触切削
变限制接触长度刀具
有限元仿真
316L奥氏体不锈钢
力热特性
Restricted contact cutting
Variable-length restricted contact tool
Finite element simulation
316L austenitic stainless steel
Force and thermal characteristics
