文档介绍：上海交通大学硕士学位论文 I Dissertation Submitted to Shanghai Jiao Tong University for the Degree of Master RESEARCH RESEARCH RESEARCH RESEARCH ON ON ON ON GRINDING GRINDING GRINDING GRINDING GEOMETRY GEOMETRY GEOMETRY GEOMETRY AND AND AND AND GRINDING GRINDING GRINDING GRINDING FORCE FORCE FORCE FORCE OF OF OF OF HIGH-HARDNESS HIGH-HARDNESS HIGH-HARDNESS HIGH-HARDNESS SPHERE SPHERE SPHERE SPHERE GRINDING GRINDING GRINDING GRINDING Candidate Candidate Candidate Candidate : Wang Yujue Student Student Student Student ID: ID: ID: ID: 1090209011 Supervisor Supervisor Supervisor Supervisor : Prof. Xu Liming Academic Academic Academic Academic Degree Degree Degree Degree Applied Applied Applied Applied for for for for : Master of Engineering Speciality Speciality Speciality Speciality : Machinery Manufacturing and Its Automation Affiliation Affiliation Affiliation Affiliation : School of Mechanical Engineering Date Date Date Date of of of of Defence Defence Defence Defence : Feb, 2010 Degree-Conferring-Institution Degree-Conferring-Institution Degree-Conferring-Institution Degree-Conferring-Institution : Shanghai Jiao Tong University 上海交通大学硕士学位论文 II 摘要在工业中广泛使用的硬密封球阀阀芯是表面喷涂有高硬度材料的大尺寸高精度球形零件,上海交通大学开发研制了专用的数控球面磨床用来磨削加工此类球形工件。目前对于平面磨削和外圆磨削的研究成果较多,但是对于使用杯形砂轮的摆动式展成法的球面磨削研究则较少,很多描述磨削过程的基本参量尚未得到完整系统的描述。对球面磨削几何学进行了研究, 推导了砂轮工件作用面积、球面磨削磨粒轨迹以及未变形磨屑面积的表达式。研究结果表明砂轮工件的相互作用面积受工艺系统结构参数和砂轮磨削状况两方面的影响, 在理想情况下其实砂轮实际切入深度的正比例函数; 磨粒轨迹受工艺参数和结构参数的双重影响;未变形磨面积度取决于砂轮磨粒的形状及实际切入深度,并受轨迹的密集程度的影响,轨迹密度越大磨屑未变形面积就越小。对球面磨削的实际切入深度进行了研究, 从工件材料的去除机理解释了实际切入深度随名义进给量呈现分段变化的原因。并在此基础上推导了球面磨削力的理论公式, 并进行了实验验证,研究的结果表面球面磨削力主要受砂轮进给量的影响,其余工艺参数主要通过影响未变形磨屑面积影响切屑变形力从而次要的影响磨削力。关键词: 球面磨削,磨削几何学,实际切入深度,磨削力上海交通大学硕士学位论文 III ABSTRACT ABSTRACT ABSTRACT ABSTRACT Metal hard seal ball valves widely used in industry are large-sized and high-precised sphere work-pieces, which are coated with materials of high hardness. Shanghai Jiao tong University developed a new kind C grinding machine to manufacturing these sphere work-pieces . At present, there a