大口径球面阀芯研磨新工艺与新机构设计研究  

Research on New Grinding Technology and the Device Design of Large Caliber Spherical Surface Valve Core

作　　者：何文平[1] 

机构地区：[1]河南工业大学机电学院,郑州450007

出　　处：《机械科学与技术》2009年第5期652-656,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：河南省教育厅2007科技攻关项目(2007460004);郑州市科技攻关项目(20066-11)资助

摘　　要：分析了大口径(1500 mm)球面阀芯整体式研具机械研磨的缺陷,不能满足球阀硬密封零泄漏而实现互换性,加工效率低;提出采用小片研具旋转研磨,并组成行星轮系研具片组,按一定速度、轨迹运动,来覆盖整个球面密封带的方法实现球面研磨;针对粗、精加工,提出采用球面上超声振动/脉冲电解加工/机械研磨复合加工,分析其加工机理得出:能有效提高加工效率,提高尺寸精度,降低表面粗糙度数值;在空间结构布局上,设计出了满足3种加工条件的新机构;为高精度大球面的加工,提供了工艺方法及机构。The drawbacks of the integral grinding setup for spherical surface valve core with a big caliber（ 1500 mm） have been analyzed. It cannot meet the requirements of hard airproof and zero leakage, and its efficiency is low. A new method for arranging many small flakes in a planetary wheel system according to the speed and track is put forward to realize spherical surface grinding. The complex process of ultrasonic oscillation, impulse electrolyzing process and mechanical grinding is also analyzed. The new method achieves effective improvement of the efficiency, dimension precision and reduction of surface rough degree. Under the space layout, a new machine satisfying three machining conditions is designed, which provides the technique and mechanism for the process of big spherical surface with high precision.

关 键 词：双偏心半球阀 研磨 超声振动 脉冲电解加工 行星轮系 短幅内摆线 

分 类 号：TH12[机械工程—机械设计及理论] TG73[金属学及工艺—刀具与模具]