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Development of Ultra High Precision Bearing Mechanisms

超高精度轴承机构的开发

基本信息

批准号：
01550090
负责人：
KYUSOJIN Akira
金额：
$ 1.28万
依托单位：
Nagaoka University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1990
项目状态：
已结题

项目摘要

In the precision measurring instruments and dividing machines polygonal shafts and holes have been used to make specially-made bearing mechanisms. In the bearing mechanisms of the famous "TALYROUND", spherical shape for lower part and three-point-contact type for upper part are used. These polygonal shapes are good for vibration characteristics and anti-whirling. Lapping has been used as a finishing mechanism to improve roundness accuracy of cylindrical shafts and holes. However, little has been published on the theoretical analysis of the finishing mechanism for high precision polygonal cross sections. This research offers two methods for finishing polygonal holes, whose shapes are ellipsoidal, triangular, four-protrusion and so on. By one method, the amplitude of the interest Fourier component of out-of-roundness keep constant, while the other components are decreased, using "regular polygonal lap". By the other method, the amplitude can be increased for any Fourier component using special types of lapping tools produced by applying the "Tripod" roundness measuring method. Using one of the tripod lapping tools, the magnitude for the four-protrusion component was increased from 7.64mum to 8.27mum, while the other components were decreased. Out-of-roundness improved from about 40mum to about 30mum. This study shows that any component of the out-of-roundness can be increased, based on a theoretical analysis, as a result many improvements on the new lapping methods, called "tripod lap".

在精密测量仪器和分度机中，多角轴和多角孔被用来制造特制的轴承机构。在著名的“塔龙”轴承机构中，下部采用球面形状，上部采用三点接触式。这些多边形形状有利于振动特性和抗旋。研磨已被用作提高圆柱轴和孔的圆度精度的精加工机构。然而，对高精度多边形截面光整加工机理的理论分析却鲜有报道。本研究提供了椭圆形、三角形、四凸等两种多边形孔的精加工方法。其中一种方法是用“正多边形搭接”的方法，使不圆度的感兴趣傅里叶分量的幅值保持不变，而其他分量的幅值则减小。通过另一种方法，可以使用通过应用“三脚架”圆度测量方法生产的特殊类型的研磨工具来增加任何傅立叶分量的幅度。使用其中一个三脚架研磨工具，四个突出部件的大小从7.64微米增加到8.27微米，而其他部件都减小了。不圆度从约40微米提高到约30微米。本研究通过理论分析表明，不圆度的任何分量都可以增加，从而对新的研磨方法进行了许多改进，称为三脚架研磨。