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现行标准中心孔的定位精度已经无法满足超精加工的要求。所以,改革中心孔的结构,提高其定位精度,已经成为轴类零件加工的研究课题。一、标准中心孔定位特性的分析标准中心孔的主要缺点,是它的圆锥母线太长。另外,加工中无论用什么方法,零件两湍的中心孔,总会产生同轴度误差,势必影响顶尖同中心孔的接啦刚度和零件旋转的稳定性。 1.中心孔同轴度误差对定缸的影响中心孔的同轴度误差,会使顶尖与中心孔的接触产生偏斜,导致其接触仅在A、B、C、D四点,如图
The current standard center hole positioning accuracy has been unable to meet the requirements of super-finishing. Therefore, the reform of the center hole structure, improve its positioning accuracy, has become a research topic of shaft parts processing. First, the standard center hole positioning characteristics of the standard hole center The main drawback is that it is too long conical generatrix. In addition, no matter what method of processing, the two parts of the turbulent center hole, there will always be a coaxial error, bound to affect the top center hole with the connection stiffness and part rotation stability. 1. Center hole coaxial error on the fixed cylinder Center hole coaxial error, will make the top center hole contact deflection, resulting in contact with only A, B, C, D four points, as shown in Figure