高速切削过程材料变形的应变率研究

doi:10.7527/S1000-6893.2017.21757

材料工程与机械制造

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高速切削过程材料变形的应变率研究

张克国, 刘勇, 王延刚

山东大学(威海) 机电与信息工程学院, 威海 264209

收稿日期:2017-09-20 修回日期:2017-12-25 出版日期:2018-03-15 发布日期:2017-12-04
通讯作者: 张克国,E-mail:zkg@sdu.edu.cn E-mail:zkg@sdu.edu.cn
基金资助:
国家自然科学基金（51775314）；中国博士后科学基金（2016M602136）；山东大学（威海）青年学者未来计划（2015WHWLJH03）

Strain rate on material deformation in high speed metal cutting process

ZHANG Keguo, LIU Yong, WANG Yan'gang

School of Mechanical, Electrical & Information Engineering, Shandong University, Weihai 264209, China

Received:2017-09-20 Revised:2017-12-25 Online:2018-03-15 Published:2017-12-04
Supported by:
National Natural Science Foundation of China (51775314);China Postdoctoral Science Foundation (2016M602136);Shandong University (Weihai) Young Scholars' Future Plan (2015WHWLJH03)

摘要/Abstract

摘要： 高速切削因众多优点被广泛研究，然而切削速度快这一特点也限制了对切削过程的认识。为了研究切削过程各类物理参量的变化规律，进而应用到工程实际，提出了从流动的角度去认识切削过程的思路。分析了从材料流动观点研究应变率的依据，提出了一种基于网格测量的应变率计算方法，获得了切削过程应变率的分布，并与计算机模拟计算结果进行了对比分析，结果表明前刀面上的应变率受前刀面摩擦的影响，越靠近前刀面应变率越大，中心剪切面上应变率在剪切面方向上最大，且剪切面两端（刀尖与自由表面处）数值最大；从流动的观点研究应变率的分布，可实现较为粗糙的应变率定量研究。

关键词: 高速切削, 流动应力, 应变, 应变率, 流动

Abstract: High-speed metal cutting has been widely studied around the world for its high efficiency and quality. However, a quantitative study on many physical parameters of the cutting is still difficult when the cutting speed is high. By investigating the feasibility of studying the strain rate from the perspective of material flow, a method for strain rate calculation is proposed based on mesh measurement. The distribution of strain rate of the metal in the cutting process is obtained, and the data obtained from calculation are compared with those from measurement. The results show that the strain rate on the rake face will be affected by the friction between the chip and the tool. The nearer the distance between the chip layer and the tool rake face, the greater the strain rate will be. The strain rate in the central shear plane is much larger than that in other areas along the shear plane direction, with the strain rate in the two ends being the greatest. The quantitative study physical parameters of high-speed cutting can thus be obtained by using this method from the perspective of material flow.

Key words: high speed machining, flow stress, strain, strain rate, flow

中图分类号:

V252

张克国, 刘勇, 王延刚. 高速切削过程材料变形的应变率研究[J]. 航空学报, 2018, 39(3): 421757-421757.

ZHANG Keguo, LIU Yong, WANG Yan'gang. Strain rate on material deformation in high speed metal cutting process[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2018, 39(3): 421757-421757.

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E-mail：hkxb@buaa.edu.cn

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高速切削过程材料变形的应变率研究

Strain rate on material deformation in high speed metal cutting process

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