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三、凸轮型面检验误差的分析 1.测量误差的产生在测量过程中发现,当工件与靠模板的极径值(当它们的极角相同时)不一致时,测量工件与靠模板曲线面各点的升程值有相对误差,这就是所要探讨的测量误差△r_c,工件极径误差越大,△r_c也越大。此外,凸轮型面的压力角大小也对△r_c有一定影响,即压力角越大的区间,其测量误差就越大。 2.测量误差△r_c的计算图5为工件与靠模板曲线面半径值不一致时产生的测量误差。图中,凸轮靠模板1和工件2同装于芯轴上,它们的回转中心为0。靠模滚子3(中心为0_1)与刀具4(铣刀或砂轮
Third, the cam surface inspection error analysis 1. The measurement error was found in the measurement process, when the workpiece and the template by the diameter value (when their polar angle is the same) are inconsistent, the workpiece surface and the template by measuring the curved surface Point of the lift value relative error, which is to be discussed measurement error △ r_c, the greater the workpiece diameter error, △ r_c also larger. In addition, the pressure angle of the cam surface also has some influence on △ r_c, that is, the bigger the pressure angle is, the bigger the measurement error is. 2 measurement error △ r_c calculation Figure 5 is the workpiece and the template curve surface radius values ?? generated when the measurement error. In the figure, the cam plate 1 and the workpiece 2 are mounted on the mandrel with their center of rotation being zero. Bearing roller 3 (center 0_1) and the tool 4 (cutter or wheel