Modeling the Effects of Minimum Quantity Lubrication on Machining Force, Temperature, and Residual Stress
Modeling the Effects of Minimum Quantity Lubrication on Machining Force, Temperature, and Residual Stress
复制标题
模拟微量润滑对加工力、温度和残余应力的影响
DOI：
10.1080/10910344.2014.955367
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发表时间：
2014-10-02
影响因子：
2.7
通讯作者：
Liang, Steven Y.
中科院分区：
文献类型：
--
作者：
Ji, Xia;Zhang, Xueping;Liang, Steven Y.
残余应力直接影响机械加工产品的疲劳极限、变形和耐腐蚀性，是评价机械加工产品质量和功能的重要指标之一。影响残余应力分布的主要因素包括机械效应、热效应、显微组织演变以及这些机制的组合。本研究以物理模型为基础，探讨微量润滑对切削力、温度及残余应力的影响。MQL油气混合物引起的润滑和冷却效应都有助于边界润滑引起的摩擦变化以及热损失引起的热应力变化。采用修正的奥克斯利模型，直接从切削条件预测切削力和切削温度。预测的切削力和温度，然后耦合到一个热-机械模型，该模型结合了运动硬化和应变相容性，以预测润滑条件下的加工引起的残余应力。所提出的分析方法进行了实验验证的正交切削试验AISI 4130合金钢的力，温度和残余应力的情况下。
Residual stress is one of the critical characteristics for assessing the qualities and functionalities of machined products in light of its direct effect on endurance limit, distortion, and corrosion resistance. Primary factors responsible for residual stresses distribution include mechanical effects, thermal effects, microstructure evolutions, and a combination of these mechanisms. This study investigates the effects of minimum quantity lubrication (MQL) on machining force, temperature and residual stress through a physics-based modeling method. Both the lubrication and cooling effects caused by MQL air-oil mixture contribute to changes in friction due to boundary lubrication as well as variations in the thermal stress due to heat loss. The modified Oxley's model is employed to predict the cutting force and temperature directly from cutting conditions. The predicted cutting force and temperature are then coupled into a thermal-mechanical model which incorporates the kinematic hardening and strain compatibility to predict the machining-induced residual stress under lubricated conditions. The proposed analytical method is experimentally verified by orthogonal cutting tests for AISI 4130 alloy steel in the context of forces, temperatures, and residual stresses.