曲轴复合车削的工件变形分析

Research on the deformation of a crankshaft's compound follow-up turning

复合车削曲轴连杆颈时,曲轴在切削力的作用下会产生弹性变形,这会使切削加工后的曲轴连杆颈相位产生误差,如果误差过大,将会使工件报废。因此必须首先分析相位误差的特点,而后在此基础上进行补偿。为研究曲轴在复合车削加工时的变形,在受力分析的基础上,研究了切削力产生的加工误差变化规律,并用ANSYS计算了曲轴在加工过程中不同工况下的扭转变形量。结果表明,曲轴连杆颈在一个回转周期中,其扭转变形量是一动态值,且在一个回转周期中的最大值是3.46'。

The crankshaft workpiece will have elastic deformation under the effect of cutting force in the process of compound follow-up turning,which will lead to the phase error of rod neck.And this may lead to scrapping when the error is too big.The error may be able to be compensated after analyzing the phase error.Based on the force analysis,research was carried out on the phase error caused by cutting force,and ANSYS software was employed to calculate the deformation extent of rod neck.Analysis showed that the deformation was a dynamic value in a rotation cycle,and the Max was 3.46.