电机机座加工关键工序分析与控制研究

发布时间：2017-12-28 06:16

本文关键词：电机机座加工关键工序分析与控制研究　出处：《佳木斯大学》2012年硕士论文　论文类型：学位论文

【摘要】：近年来，中小型电机在国内外的需求呈上升趋势，而且对电机质量性能要求越来越高。在电机结构中影响电机气隙大小与均匀性的主要零部件是电机机座。如何控制电机机座两端止口中心线对铁芯档内圆轴线的同轴度误差是国内电机行业急需技术升级的核心问题之一。电机机座属薄壁零件，结构复杂，形位精度高，生产批量大。其传统加工工艺中基准不统一，以及机座内孔与定位销之间的配合间隙，经常导致同轴度误差超差，使机座难以达到加工质量要求，给电机装配带来很大困难，从而影响到电机的性能及工作的稳定性。本文在分析了国内外加工工艺装备技术改进现状与薄壁零件加工现状的基础之上，遵循加工基准统一原则，从工艺角度降低机座关键工序的同轴度误差。以减少机座止口加工误差为原则，采用有限元分析软件，对不同切削工况下机座旋转模态和切削力对止口加工过程误差的影响进行了深入的分析： 1.分析电机机座传统加工工艺，，找出产生同轴度误差的主要原因，解析同轴度的评定原则，并论证了采用径向圆跳动误差替代同轴度误差的可行性。 2.对电机机座止口立车精加工的切削力进行了测量，验证了在立式内孔车削情况下应用卧车外圆的切削力经验公式的可行性，从而确定不同工况条件下机座止口切削加工时的切削力有效值。 3.采用ANSYS软件模拟机座旋转状态下的固有模态，确定出机座粗、精加工的基本装夹方案，对电机机座加工过程进行了瞬态动力分析，得到机座在不同装夹方案下切削时的变形及应力分布情况，从而确定出减少机座内圆径向圆跳动误差、提高同轴度精度的具体装夹方案。 4.以上述分析结果为基础，初步设计出一套适用于YB225-s型防爆电机机座的新型工装设计方案。此研究对电机机座的机械加工工艺过程设计、工装设计及其生产实际具有一定的现实意义与价值，对提高电机制造质量、使电机零部件具有良好的互换性及降低机械加工成本等，具有重要参考意义。
[Abstract]:In recent years, the demand for small and medium motors is on the rise at home and abroad, and the quality and performance of the motor is becoming more and more high. The main component that affects the size and uniformity of the air gap in the motor structure is the motor seat. How to control the coaxality error of the central line of the two ends of the motor frame to the inner core axis of the iron core is one of the core issues that the domestic motor industry is in urgent need of upgrading. The motor frame is a thin wall part, with complex structure, high precision of shape and position and large production volume. The traditional processing technology standard is not unified, with the gap between the frame and the hole and the positioning pin, often leads to coaxiality error, so that the frame to reach the requirement of production quality, which brings great difficulties to the motor assembly, thereby affecting the motor performance and working stability. Based on the analysis of the improvement of processing technology and equipment and the processing status of thin-walled parts at home and abroad, following the unified principle of machining datum, the coaxality error of key process of machine frame is reduced from the angle of technology. Based on the principle of reducing machining error, the influence of rotary mode and cutting force on the machining errors of different ports under different cutting conditions is analyzed by finite element analysis software.
【学位授予单位】：佳木斯大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TM305;TH162

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