高等级渐开线样板精密磨削实验研究

Experimental research on precision grinding for high-grade involute artifact

渐开线的复杂性与加工、测试中的特殊性一直是渐开线样板制造技术中的瓶颈.为研制高等级渐开线样板,首先探讨了渐开线的成型原理,指出滚轮-导轨式机械展成机构具有渐开线一次成型、驱动精度不影响渐开线的展成精度、误差来源少的优点,适合加工高等级渐开线样板.然后根据渐开线的生成原理,设计了双滚轮-双导轨式渐开线样板测量与磨削装置.最后对一渐开线凸轮试件进行了精密磨削实验,精密测试表明,该渐开线凸轮试件在105mm的展成长度内渐开面的齿廓总偏差不超过0.6μm,齿廓形状偏差不超过0.4μm.实验结果表明,双滚轮-双导轨式渐开线样板磨削与测量装置符合渐开线的成型原理,具备加工与测量高等级渐开线样板的能力.

The complexity and specificity of involute processing and test have been the bottleneck of manufacturing technique for involute artifact. In order to develop high-grade involute artifact, the forming principle of the involute is discussed, and it is pointed out that the wheel-rail type of mechanical generating mechanism which forms the involute by one-time method and has no effects of driving accuracy on generating accuracy and has less error source is suitable for processing the high- grade involute artifact. Then, the double-wheel-rail type of grinding and testing devices for the involute artifact is designed according to the forming principle of the involute. Finally, a precision grinding experiment for an involute cam is conducted. The testing results show that the total profile deviation is not more than 0.6/xm and the profile form deviation is not more than 0.4 t^m in 105 mm generating length of the involute cam. The experimental results show that the double-wheel-rail type of mechanical generating mechanism matches with the forming principle of the involute and has the capability of processing and measuring high-grade involute artifact.