共查询到17条相似文献,搜索用时 104 毫秒
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四轴球体研磨机的研磨均匀性 总被引:2,自引:0,他引:2
为了分析四轴球体研磨机的研磨去除量,建立了四轴球体加工时的力学模型,分析了四研具在空间位置的几何关系和加工球与四研具之间的运动关系,给出了研具上的一点相对加工球的速度矢量.在Preston方程基础上,建立了四轴球体研磨机实现球面均匀研磨的分析模型,并应用Matlab软件对单位时间去除量进行仿真分析.以离散化的旋转角为变量,间距取0.01°,采用方差为指标评价研磨去除量的均匀性.分析结果显示,研磨去除量与角速度成线性关系,研具改变转向的相位角为90°时方差最小,研磨过程中不断改变四个研具的旋转方向,可获得好的研磨均匀性.实验结果表明,四轴球体研磨机是高精密加工非常有效的方法. 相似文献
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通过对四轴球体研磨机的位置、速度、球面研磨成原理进行了分析,为该机设计时主要技术参数的确定提供了设计规范。尤其是利用相对运动不变原理分析研具对球体研磨的成型过程,在揭示研具对球体研磨具有展成包络性的同时,建立了球面设计的计算公式,为该机的工艺和误差分析奠定了基础。 相似文献
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建立了四轴球体加工时的力学模型,分析了加工球与四研具之间的运动关系,给出了研具上一点相对加工球的速度矢量,在Preston方程基础上,建立了四轴球体研磨机实现球面均匀研磨的分析模型,并应用matlab软件对单位时间去除量进行仿真分析。采用方差的指标评价研磨去除量得均匀性。分析结果表明研具改变转向的相位角为90°时方差最小,为了达到研磨均匀性必须改变四个研具的旋转方向。 相似文献
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介绍了金属密封球体研磨加工的研磨特点和类别,给出了球体研磨机的结构原理和操作特性。分析了球体研磨过程中磨料粒度、磨料浓度、研磨速度及其单位压力与研磨效率和加工表面粗糙度的关系。 相似文献
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陶瓷球研磨装置设计和试验 总被引:4,自引:0,他引:4
为提高陶瓷球研磨加工效率,本文对陶瓷球三磨过程及研磨装置进行了理论分析。据此确定了研磨的设计指标,提出了新的陶瓷球研磨方法锥形研磨法。 相似文献
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针对国内外齿轮精加工技术的现状及趋势,探索一种硬齿以研代磨新工艺,应用动态开磨和均化理论,经过理论分析和大量实验研究,取得了阶段性成果。 相似文献
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Dominic S. Guevarra Akira Kyusojin Hiromi Isobe Yoshiaki Kaneko 《Precision Engineering》2002,26(4):389-395
This paper presents a new approach in lapping process in making appropriate condition to improve the manufacturing operations for ball screw. After grinding, high precision ball screw is lapped by highly skilled operators. These operators have the ability to control and maintain the lapping conditions by sensing the lapping torque manually. Prior to lapping process, the effective diameter must be measured to find out the effective threaded profile along the screw shaft. The section which has a large effective diameter will be primarily lapped wherein the lapping torque is high. The aim of this study is to establish a control scheme on the automatic lapping machine for high precision ball screw in both measuring and finishing process. A prototyped horizontal lapping machine with in-process torque monitoring system has been designed, built, and tested. This is to determine the relationship among lapping torque, effective diameter, and error on travel to establish the measurement system to control the finishing operations efficiently and eventually improve and eliminate the various sorts of error components in a ball screw. The experimental results showed that the new lapping method could adequately predict the effective diameter and error on travel by observing the lapping torque. 相似文献
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Dominic S. Guevarra Akira Kyusojin Hiromi Isobe Yoshiaki Kaneko 《Precision Engineering》2001,25(1):63
Ball screws are being lapped as a finishing process to improve the travel variation, drunkenness and surface finish in order to provide high precision requirements in various mechanical applications. However, the existing manufacturing method is very labor intensive that needs a highly skilled machinist to perform the hand lapping operations using the conventional laps which have two or three slits. These types of lap cannot eliminate and improve the special components of drunkenness such as ellipsoidal, triangular and other polygonal cross sections. This paper presents a new lapping method to determine the technical and operational feasibility of a prototyped lapping tool with the combination of a flexible lap and polyurethane elastomer which can be mounted in the vertical-type automatic lapping machine. This new type lapping tool with six slits, is especially designed which each section can move in radial direction wherein the uniform lapping pressure is applied on the test piece from six directions. Based on experimental results, it showed that the travel variation was greatly reduced along with drunkenness and lapping time. 相似文献