东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (3): 88-96.DOI: 10.12068/j.issn.1005-3026.2025.20230278

• 机械工程 • 上一篇    下一篇

电火花线切割Inconel 718温度场分析与加工建模

张耀满(), 吴双金, 饶兆峰   

  1. 东北大学 机械工程与自动化学院,辽宁 沈阳 110819
  • 收稿日期:2023-10-07 出版日期:2025-03-15 发布日期:2025-05-29
  • 通讯作者: 张耀满
  • 作者简介:张耀满(1972—),男,辽宁辽中人,东北大学副教授.
  • 基金资助:
    国家自然科学基金资助项目(U23B20106);辽宁省教育厅科学研究项目(LJKZ0001)

Temperature Field Analysis and Machining Modeling of Inconel 718 for Wire Electrical Discharge Machining

Yao-man ZHANG(), Shuang-jin WU, Zhao-feng RAO   

  1. School of Mechanical Engineering & Automation,Northeastern University,Shenyang 110819,China. cn
  • Received:2023-10-07 Online:2025-03-15 Published:2025-05-29
  • Contact: Yao-man ZHANG
  • About author:ZHANG Yao-man E-mail: zhangyaoman@mail.neu.edu.cn

摘要:

针对Inconel 718材料的高加工硬化率和切削温度变化大等特点,以电火花线切割(WEDM)加工Inconel 718的放电加工过程为研究对象,对其加工机理和建模进行深入研究.采用有限差分法和有限元仿真对单脉冲放电温度场进行分析,得到了给定参数下的理论、仿真温度分布结果,并进一步探究了脉冲宽度对电蚀坑尺寸与形状的影响规律.在考虑重铸层对电蚀坑尺寸影响的基础上,预测了加工的表面粗糙度和材料去除率,并与实验数据进行对比.结果表明:随着脉冲宽度的变化,理论与仿真的电蚀坑尺寸变化趋势一致,所建立工艺目标预测模型的理论和仿真数据与实验结果的最大误差为9.88%.

关键词: 电火花线切割, Inconel 718, 有限差分法, 有限元法, 温度场分析, 重铸层

Abstract:

Aiming at the characteristics of Inconel 718 material such as high work hardening rate and large cutting temperature variation, the machining mechanism and modeling of Inconel 718 were deeply studied by taking the discharge machining process of wire electrical discharge machining as the research object. The temperature field of single-pulse discharge is analyzed by the finite difference method and finite element simulation, and the theoretical and simulation temperature distribution results under given parameters are obtained. Furthermore, the law of the influence of pulse width on the size and shape of the corrosion pit is further explored. On the basis of considering the influence of the recast layer on the size of the pit, the surface roughness and material removal rate of machining are predicted and compared with the experimental data. The results show that with the change of pulse width, the variation trend of the theoretical and simulated electric pit dimensions is consistent. The maximum error between theoretical and simulation data and experimental results is 9.88%.

Key words: wire electrical discharge machining, Inconel 718, finite difference method, finite element method, temperature field analysis, recast layer

中图分类号: