【摘要】 针对某型缸盖凸轮轴轴承盖非连续安装面整体加工平面存在常值性系统误差的问题,对30件同一铝合金缸盖工件平面度测量数据的均方根误差和相关熵估计进行统计分析;利用面型的评价标准,对平面测量值进行筛选,识别出能够反映整体常值性系统误差的数据。依据加工轨迹,对轴承盖安装面的五列分别进行加工补偿。对同列多面采用同一补偿值进行高度补偿,根据同列各面测量数据相对于最小二乘平面的波动大小分配每个面的补偿权重系数。实验结果表明,用此方法进行加工补偿后,发动机凸轮轴承盖安装面的整体偏差减小60%,加工精度得到显著改善。更多还原

【Abstract】 Aiming at the problem of constant systematic errors in the overall machining plane of a certain type of cylinder head camshaft bearing cover discontinuous mounting surface, the root mean square error and related entropy estimation of the flatness measurement data of 30 pieces of the same aluminum alloy cylinder head workpiece are statistically analyzed; Using the evaluation criteria of the surface shape to filter the plane measurement values and identify the data that can reflect the overall constant system error. According to the processing trajectory, the five rows of the bearing cap mounting surface are respectively processed and compensated. The same compensation value is used for height compensation for multiple faces in the same column, and the compensation weight coefficient of each face is allocated according to the fluctuation of the measured data of each face in the same column relative to the least square plane. The experimental results show that after processing compensation with this method, the overall deviation of the engine cam bearing cover mounting surface is reduced by 60%, and the processing accuracy is significantly improved.更多还原