%0 Journal Article
%T 材料本构参数对高速切削锯齿形切屑形成的数值分析<br>Numerical Analysis of Influence of Material Constitutive Parameters on Serrated Chip Formation in High Speed Machining
%A 王伏林
%A 陶琪
%A 肖珞琼
%A 邓朝晖
%J 机械科学与技术
%D 2018
%X 基于正交切削模型分析了材料本构参数对高速切削锯齿形切屑的影响。研究发现：切削力和切削温度随材料本构参数值A、B、C和n呈线性变化；参数A和n对切屑形貌影响较大；参数B、C和m影响锯齿形切屑的曲率半径，若C ≤ 0.01，m ≥ 5，参数C和m对切屑形貌以及切削力和切削温度的影响可以忽略。工件材料硬度增加，A值增大，而n值减小；对于受应变率影响大的材料，C值较大；受温度影响大的工件，m值较小。本文结论为预测材料在不同硬度时本构参数值的变化，或根据材料本构参数值推断材料硬度值以及不同材料的固有属性差异性比较提供了参考。<br>In this paper, the influence of the material constitutive parameters on the serrated chip is analyzed based on the orthogonal cutting model in high speed machining. The results show that the cutting force and cutting temperature change linearly with the constitutive parameters A, B, C and n; The parameters A and n have great influence on the chip morphology, while the parameters B, C and m influence the curvature radius of serrated chip; However, the effects of the parameters C and m on the chip morphology, cutting force and cutting temperature can be ignored at C below 0.01 and m above 5. The value of A increases with the increasing of hardness value and decreasing of n of workpiece. For materials depending on strain rate, value of C is larger; And for workpiece vulnerable to temperature, value of m is smaller. It can provide a guidance for predicting the variation of the material parameters under different hardness, inferring the material hardness value according to the material constitutive parameters and the comparison of material property difference
%K 锯齿形切屑
%K 材料本构参数
%K 数值分析
%K 高速切削&lt
%K br&gt
%K serrated chip
%K material constitutive parameters
%K numerical analysis
%K high speed machining
%U http://journals.nwpu.edu.cn/jxkxyjs/CN/abstract/abstract6944.shtml