高压冷却条件下刀具摩擦性能的仿真研究

Simulation Study on Friction Performance of Tool Under High Pressure Cooling

不锈钢材料具有良好的性能,在航空、航天等领域得到广泛的应用。改善其加工特性、降低刀-屑间的摩擦阻力的试验研究已得到很大程度上的重视和实践,但对于摩擦性能的仿真分析以及冷却方式需进一步研究。本研究将使用Third Wave AdvantEdge有限元软件,基于316奥氏体不锈钢模拟干切削和高压冷却的切削进程,研究切削条件对刀-屑间的摩擦特性的影响。研究结果表明:切削参数的三个因素在两种切削环境下对刀-屑间的摩擦系数μ的影响程度是一致的,从大到小依次为:进给量、切削速度、背吃刀量;在同样的切削参数下,对于主切削分力、进给抗力、刀-屑间的摩擦系数μ,在高压冷却(HPC 200 bar)条件下与干切削(DRY)相比数值有所降低。

Stainless steel materials have good performance and are widely used in aviation,aerospace and other fields.The exper⁃imental research on improving the processing characteristics and reducing the frictional resistance between the tool and the chip has been paid great attention and practice,but the simulation analysis and cooling method of the friction performance need fur⁃ther study.The study will use the Third Wave AdvantEdge finite element software to study the effects of cutting conditions on the friction characteristics between the chip and the tool based on the 316 austenitic stainless steel simulated dry cutting and high-pressure cooling cutting process.The three factors of cutting parameters have the same influence on the friction coefficientμbe⁃tween the tools and the chips in the two cutting environments.The order from the largest to the smallest is:feed rate,cutting speed,and back-feeding amount.When it comes to the main cutting component force,the feed resistance,the friction coefficientμbetween the tools and the chips,under the same cutting parameters,the high-pressure cooling(HPC 200 bar)is compared with the dry cutting(DRY).The value obtained is reduced.