立式磨削工艺系统建模方法及仿真研究

Research on Modeling Method and Simulation of Vertical Grinding Process System

为研究磨削行为和磨削误差,提出以立式磨削工艺系统为分析对象的误差分析模型。该模型由转台、工件、砂轮、主轴等零部件组成。分析转速比、工件初始圆度误差相位、磨削时间和主轴回转误差对磨削精度的影响规律。结果表明:该系统能预测磨削行为和磨削误差;当转速比为整数时,磨削精度随着转速比的增大而提高;当转速比不是整数时,变化情况更加复杂;工件初始圆度误差的相位对最终的加工圆度不会产生影响;随着磨削的进行,工件圆度误差开始降低得很快,随后降低趋势逐渐变缓;在主轴误差的组成频率中,3阶误差导致的圆度误差最大,2阶误差导致的圆度误差最小。

In order to study grinding behavior and grinding error,an error analysis model based on vertical grinding process system was proposed.The model was composed of turntable,workpiece,grinding wheel,spindle and other components.The effects of speed ratio,initial roundness error phase,grinding time and spindle rotation error on grinding accuracy were analyzed.The results show that by using the system,the grinding behavior and grinding error can be predicted;when the speed ratio is an integer,the grinding accuracy increases with the increase of the speed ratio;when the speed ratio is not an integer,the change is more complex;the phase of the initial roundness error of the workpiece can not affect the final machining roundness;with the progress of grinding,the roundness error of the workpiece starts to decrease quickly,and then the decreasing trend gradually slows down;among the component frequencies of spindle errors,the third order error causes the largest roundness error and the second order error causes the smallest roundness error.