【摘要】 针对研磨中工件的安装倾斜误差,提出了导致工件面形误差的分析方法,建立新、原坐标系,应用坐标变换,推导出工件曲线上各点相对理想曲线对应点的误差模型。工件安装倾斜角度不同、形状及精度要求不同导致的面形误差不同,利用模型分析了这几种情况对面形误差的影响,工件面形误差随安装倾斜角度的增大而增大,当安装倾斜角度由0.1°~1°变化时,工件面形负误差由-0.0030mm增大到-0.0448mm,增加了一个数量级;工件面形误差沿着曲面中点向边缘逐渐增大;相同的安装倾斜角度对大陡度曲面的面形误差影响较大。因此,在研磨中等精度要求的工件时,安装倾斜角度不应超过0.1°,陡度参数不应小于100mm。更多还原

【Abstract】 In view of the inclining error in installing to the work-piece in lapping, an analytic method for profile error is presented, new and old rectangular coordinates are established, and error model of work-piece between its actual and ideal curve is deduced through coordinate transform. The profile error of the work-piece varies with the inclining angle, the profile and precision of the work-piece, so the effect on the profile error above several instances is analyzed on the basis of the error model. The profile error of workpiece increases with the addition of inclining angle. When the inclining angle change from 0.1° to 1°, the negative error of the workpiece increases from -0.0030mm to -0.0448mm to a quantity grade and the profile error increases gradually from the curved surface’s center to the edge. The influence with great steepness curved surface is bigger than that with the small steepness curved surface. Hence, the inclining angle should not exceed 0.1° and the value of steepness parameter should be not less than 100mm for the workpiece of middling precision in lapping.更多还原