基于曲轴轮廓误差分析的随动磨床轴性能预测

发动机曲轴生产线要求曲轴随动磨床具有高可靠性和高精度稳定性.基于现场曲轴轮廓误差数据,分析得到其与随动磨床轴位置控制误差的对应关系,对于随动磨床轴的性能预测和可靠性维护具有重要意义.首先给出由随动磨床轴位置控制误差计算曲轴轮廓误差的方法.其次提出基于变分模态分解的曲轴轮廓误差分析方法.最后通过磨削实验采集和测量误差数据...

Axis performance prediction of oscillating grinder based on crankshaft contour error analysis

Engine crankshaft production line requires high reliability and accuracy stability for the oscillating grinding machine.Based on the field contour error data of the crankshaft,the mapping relation between the contour error of the crankshaft and the axis position control error of the oscillating grinding machine can be obtained.There will be great significance for the axis performance predication and the reliability maintenance of the oscillating grinding machine.Firstly,a calculation method from the axis position control error of the oscillating grinder to the contour error of the crankshaft is presented.Secondly,the contour error analysis method based on variational mode decomposition(VMD)is proposed.Lastly,through the grinding experiments,the error data is acquired and measured to calculate and analyze the error data by using VMD method for obtaining the mapping relationship between the crankshaft contour error and the axis position control error.The conclusion shows the two IMF(intrinsic mode functions,IMF)components of the crankshaft contour error that are analyzed by VMD correspond to the contour error caused by X-axis and C-axis position control error respectively.Therefore,the proposed method can realize the axis performance prediction of the oscillating grinder.