分度回转工作台分度误差的检查

• 出 处: 组合机床通讯
• 发表日期: 1972年05期
• 关键词: 分度回转工作台 分度精度 误差值 等于零 角度差 相应点 偏移量 检验程序 纵向运动 标值

为了确定数控机床回转工作台的分度精度,用图1所示的四边形检验棱柱来检验圆周上的每个90°分度。检验棱柱四个角的值是已知的。如图1所示,假定角A=90°-5μ;角B=90-3μ;角C=90°+6μ和角D=90°+2μ。各90°角的差值之总和很明显等于零(-5-3+6+2=0)。这种用微米(μ)表示角度差值的方法,看来是不常用的,但却可求出精确的误差值。

In order to determine the indexing accuracy of the rotary table on a CNC machine, check the prism with a quadrilateral as shown in Figure 1 to check each 90 ° index on the circumference. The values ​​of the four corners of the prism are known. As shown in FIG. 1, it is assumed that angle A = 90 ° -5μ; angle B = 90-3μ; angle C = 90 ° + 6μ and angle D = 90 ° + 2μ. The sum of the differences at each 90 ° angle is clearly equal to zero (-5-3 + 6 + 2 = 0). This method of expressing the angle difference in micrometers (μ) does not seem to be commonly used, but accurate error values ​​can be obtained.