锯齿状芯片形态及其与有限元模拟的比较

L. Deshayes, Tarek Mabrouki, R. Ivester, J. Rigal
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引用次数: 18

摘要

加工过程中切屑形成的复杂性源于在非常高的应变速率下发生的几种物理现象-机械,热和化学-的汇合。切屑形态的预测依赖于对这些现象的基本理解,对于切削力预测和表面完整性控制具有重要的工业意义。本文重点研究了锯齿形切屑的切屑形态特征,并利用有限元模拟方法讨论了锯齿形切屑形成的物理现象。本文介绍了文献综述和切屑形成的实验研究。以美国钢铁协会(AISI) 4340合金钢为研究对象,进行了切屑形貌金相分析和硬度测试。采用两个有限元软件包模拟正交切削条件下的切屑形成。将有限元计算结果与硬度测量结果进行了比较,并讨论了用于支持模拟的切屑形貌表征方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Serrated Chip Morphology and Comparison With Finite Element Simulations
The complexity of chip formation in machining processes stems from the confluence of several physical phenomena — mechanical, thermal, and chemical — occurring at very high strain rate. The prediction of chip morphology depends on a fundamental understanding of these phenomena and is of industrial importance for cutting force prediction and surface integrity control. Our paper focuses on characterizing the chip morphology of serrated-chip (saw-tooth shape chip) and discusses the physical phenomena accompanying the serrated-chip formation according to finite element modeling (FEM) simulations. The paper presents a bibliographic review and an experimental study of chip formation. The experimental study, based on metallographic analysis of chip morphology and hardness measurements, focuses on machining of American Iron and Steel Institute (AISI) 4340 steel alloy. Two finite element software packages were used to simulate chip formation under orthogonal cutting conditions. The FEM results are compared with the hardness measurements, and the chip morphology characterization method used to support the simulations is discussed.
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