多因素对双驱进给系统不同步误差影响

Influence of Multi-factors on the Non-synchronous Errors of Dual-driving Feed System

为研究立式加工中心双驱进给系统结构参数对双轴不同步误差影响规律,以立式加工中心KSMC1250双驱进给系统为研究对象,通过对双驱进给系统动力学分析,建立双驱进给系统不同步误差数学模型,该模型考虑丝杠导轨间距、摩擦等因素;建立动态仿真模型,分析双驱进给系统结构参数对双轴不同步误差的影响。结果表明,在数控机床双驱进给系统结构设计时,应尽量增大丝杠导轨间距,主轴箱部件重心的偏心参数尽量小,且减小主轴箱部件质量,以减小两轴不同步误差,从而提高数控机床加工精度。研究结果为数控机床双驱进给系统结构设计先进控制策略提供参考。

In order to study the influence lawof the dual-driving feed system structure parameters on two axial non-synchronous errors,according to the vertical machine center KSMC1250 Y axis dual-driving feed system as the research object,based on dynamics analysis of the dual-driving feed system,the mode of the dual-driving feed system was established,it considered the lead screwspacing,frictions and other factors,the paper established simulation mode of the dual-driving feed system,it analyzed the influence of structure parameters on the two axial non-synchronous errors. The results showed that the structure design of NC machine dual-driving feed system should try to increase the distance of the lead screwand the guide,the eccentricity of the center of gravity of the spindle box components is as small as possible,and reduce the spindle box parts quality. That reduce the non-synchronous errors and improve the NC machine tools machining precision. The results provide a reference for the advanced control strategy and structure design of the dual-driving feed system of NC machine.