涂层刀具高速车削高强度合金钢有限元仿真

Finite Element Simulation of High Speed Turning of High Strength Alloy Steel by Coating Tools

针对高强度合金钢难加工的特点,选用不同涂层刀具进行了有限元分析,研究了刀具与工件的热—力性能匹配,并分析了切削参数对刀具应力和切削温度的影响。研究结果表明:在相同切削的条件下,应力最小的是Ti C涂层刀具,其次是Ti CN,Al2O3最大;切削温度最高的是Al2O3涂层刀具,Ti CN次之,Ti C最低。在刀具应力和切削温度的作用下,Ti C涂层刀具后刀面易受到破坏,Al2O3涂层刀具刀尖易受到破坏,Ti CN其前刀面易受到破坏,Ti C涂层能够有效的降低刀具和加工表面温度,有利于提高刀具的耐用度。在不同的切削条件下,切削用量对Ti CN和Ti C涂层刀具的影响基本相同,Al2O3受影响较大。

In view of the characteristics of high strength alloy steel, the finite element analysis is carried out with different coating tools. The thermal and mechanical properties of the tool and the workpiece are analyzed. The influence of cutting parameters on the cutting parameters and cutting temperature is analyzed. The research results show that：in the same cutting conditions, the stress is the minimum of the TiC coating tool, followed by TiCN, Al2 O3 maximum; cutting temperature is the highest Al2 O3 coating tool, TiCN times, TiC minimum. In cutting force and cutting temperature of the role and TiC coating tool rake face is easy to be damaged, Al2 O3 coating cutting tool is easy to be damaged, TiCN the rake face is easy to be damaged, TiC coating can effectively reduce tool and machined surface temperature, is conducive to improve the cutting tool durability. Under different cutting conditions, the influence of cutting parameters on the TiCN and TiC coating tools is identical basically. Al2 O3 is affected by the larger.