• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2018, Vol. 54 ›› Issue (17): 246-254.doi: 10.3901/JME.2018.17.246

• 制造工艺与装备 • 上一篇    下一篇

12CrNi4A材料轴向超声干磨削残余应力计算及试验研究

唐进元, 郑金超, 廖东日, 邵文   

  1. 中南大学高性能复杂制造国家重点实验室 长沙 410083
  • 收稿日期:2018-01-06 修回日期:2018-05-06 出版日期:2018-09-05 发布日期:2018-09-05
  • 作者简介:唐进元,男,1962年出生,教授。主要研究方向为齿轮动力学、数字化制造。E-mail:jytangcsu@163.com;郑金超,男,1993年出生,硕士研究生。主要研究方向为超声磨削加工。E-mail:306305552@qq.com
  • 基金资助:
    国家自然科学基金重点(51535012,U1604255)、国家自然科学基金青年科学基金(51705542)、湖南省重点研发计划(2016JC2001)和中南大学中央高校基本科研业务费专项资金(2017zzts404)资助项目。

Calculation and Experimental Study on Residual Stress in Axial Ultrasonic Dry Grinding of 12CrNi4A Material

TANG Jinyuan, ZHENG Jinchao, LIAO Dongri, SHAO Wen   

  1. State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083
  • Received:2018-01-06 Revised:2018-05-06 Online:2018-09-05 Published:2018-09-05

摘要: 金属材料12CrNi4A是一种高强度合金钢,研究12CrNi4A材料轴向超声干磨削(Ultrasonic dry grinding,UDG)下的残余应力计算问题。运用逆热法构建一种新的非高斯热源模型,基于有限元软件COMSOL,计算出金属材料12CrNi4A超声磨削温度场分布。用打孔埋布嵌入式热电偶方法测出UAG的磨削区温度历程及分布,通过有限元计算与实测结果进行对比,磨削区温度误差值在5%以内。加载运动学硬化函数,耦合磨削热及磨削力对超声磨削残余应力场进行有限元计算,得到超声磨削表层残余应力分布,与实测值进行对比,误差在10%以内。研究表明:1)超声磨削可有效降低磨削区温度,降低幅值为24.1%;2)超声磨削可有效减少磨削残余拉应力,增加磨削残余压应力。所提出的预测超声干磨削残余应力的方法,对超声磨削的深入研究有借鉴参考价值。

关键词: 超声磨削, 超声磨削残余应力仿真, 磨削温度测量, 运动学硬化

Abstract: Metallic material 12CrNi4A is a high-strength alloy steel, residual stress calculation of 12CrNi4A material in axial ultrasonic dry grinding (UDG) is researched. A new non-Gaussian heat source model is constructed by using the inverse heat method, and the temperature field distribution of 12CrNi4A under ultrasonic grinding process is calculated based on the finite element software COMSOL. The temperature history and distribution of ultrasonic grinding are measured by embedded thermocouple method. The finite element calculation is compared with the measured results, and the temperature error of grinding zone is within 5%. Considering the kinematic hardening function, coupling grinding thermal and grinding force of UAG, using finite method calculation ultrasonic grinding (UAG) surface residual stress distribution, compared with the measured values with X-ray, the error is within 10%. The results show that:1) ultrasonic grinding can effectively reduce the tensile residual stress cause by grinding heat and increase the residual compressive stress; 2) ultrasonic grinding can effectively reduce the maximum temperature in grinding zone and the reduction value equal to 24.1%. Based on the method of theoretical calculation and experiment, this paper predicts the residual stress of ultrasonic dry grinding is providing a reference for the in-depth study on ultrasonic grinding.

Key words: kinematic hardening, measurement of grinding temperature, simulation residual stress of ultrasonic grinding, ultrasonic grinding

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