摘要
大型高精度球体是大型高档硬密封阀门的关键核心零件,采用传统加工方式难以解决球体零件自重对加工精度的影响,球体零件的精度和表面质量难以达到硬密封要求,因此研制了一种大型立式球面磨床,分析了机床的主要构型、工作原理。通过范成法磨削原理的分析,建立SMG240立式球面磨床磨削轨迹的数学模型,并通过Ansys软件模拟仿真了砂条磨削轨迹;研究了影响磨削轨迹和磨削质量的主要参数,研究结果表明,当磨头顺时针旋转,球体顺时针旋转、磨头转速与球体转速的比为30、砂条个数为16时,磨削效果较佳,最后进行了磨削实验,实现了直径2 000 mm大型球体的球形精度±0.015 mm、表面粗糙度Ra≤0.4μm。验证了磨削参数的有效性,成功地实现了大型高精度球体的高精度和高效率磨削加工,改善了磨削质量。
The large high-precision sphere is the key core part of the large high-grade hard seal valve,it difficult to solve the influence of the self-weight of the spherical parts on the processing precision by traditional processing methods.The precision and surface quality of spherical parts are hard to meet the requirements of hard sealing.Therefore,a large vertical spherical grinder is developed and the main configuration and working principle of the machine are analyzed.By analyzing the principle of the generating grinding method,a mathematical model for the grinding trajectory of SMG240 vertical spherical grinder is established.The grinding trajectory was simulated and simulated with Ansys software.The main parameters affecting the grinding trajectory and grinding quality were studied.The research highlights specific operational conditions such as clockwise rotation of both the grinding head and sphere,the ratio of grinding head speed to sphere speed is 30,and the number of sand strips is sixteen,the grinding effect is optimal.Finally,grinding experiments were conducted,achieving a spherical precision of ±0.015 mm and a surface roughness Ra≤0.4 μm for a large 2 000 mm diameter spherical body.The effectiveness of the grinding parameters was verified,the high-precision and highefficiency grinding of large-scale high-precision spherical bodies is realized successfully,and the grinding quality is improved.
作者
卢强
LU Qiang(Neway CNC Equipment(Suzhou)Co.,Ltd.,Suzhou 215153,CHN)
出处
《制造技术与机床》
北大核心
2024年第7期118-123,共6页
Manufacturing Technology & Machine Tool
关键词
立式球面磨床
磨削
高精度
ANSYS仿真
数学模型
vertical spherical grinding machine
grinding
high-precision
Ansys simulation
mathematical model
