曲轴车-车梳加工用硬质合金刀片切削性能实验研究

Experimental Research on Cutting Performance of Cemented Carbide Inserts Used in Crankshaft's Turn-Turn Chasing Process

本文以硬质合金刀片为研究对象,设计了一套完整的车-车梳模拟切削工艺,在该工艺中确定了每一个工序的工件状态、对应使用的刀片型号及其走刀路线。经过一定的分析,确定了每种刀片所侧重的切削性能,以此为优化标准来安排切削实验。分别对R型刀片和C型刀片进行了断屑实验,通过收集切屑分析两种刀片的断屑效果;对V型刀片和梳型刀片进行了粗糙度实验,采用RA-200型号的电感式粗糙度仪进行粗糙度测量。实验切削参数的选择由企业推荐参数为中心向前后扩展。实验后以每种刀片所侧重的优化性能为参考选出了最佳的切削参数组合,各刀片对应的最优切削参数分别为:R型刀片Vc=120 m/min,f=0.35 mm/r;C型刀片Vc=180 m/min,f=0.35 mm/r;V型刀片Vc=180 m/min,f=0.3 mm/r;梳型刀片Vc=260 m/min,f=0.15 mm/r。

Taking cemented carbide inserts as researching objects, a complete simulant cutting process of turn-turn chasing was designed in this article. The workpiece condition, the corresponding inserts model and their tool path in each step were determined in this process. Cutting experiments were arranged according to the optimal standard of cutting performance that each insert was focused on after analysis. The chip breaking experiments were carried out on R type insert and C type insert and the chip breaking effects were compared by collecting chips. The roughness experiments were carried out on V type insert and comb type insert and the roughness was measured by RA-200 inductive roughness meter. The experimental parameters were choseri by reference to the recommended parameters. After every experiment, the best cutting parameter groups were picked out due to the optimal performance of each insert, which are as follow： Vc=120 m/min, f=0.35 mm/r for R type insert; Vc=180 m/min, f=0.35 mm/r for C type insert; Vc=180 m/min, f=0.3 mm/r for V type insert; Vc=260 m/ min, f=0.15 mm/r for comb type insert.