高精度重型数控机床C轴分度装置的设计和分析.pdf

Classified Index: TG659 : - Dissertation for the Master Degree in Engineering THE DESIGN AND ANALYSIS OF C AXIS FEED INDEX DEVICE OF HIGH PRECISION HEAVY NC MACHINE TOOLCandidate:Wu Guicheng Supervisor: Hongya Academic Degree Applied for:Master of Engineering Speciality:Mechanical Manufacturing and Automation Affiliation: School of Mechatronics and Electrical Engineering Date of Defence:June, 2008Degree-Conferring-Institution Habin Institute of Technology 哈尔滨工业大学工学硕士学位论文 - I - 摘要在数控车铣加工中心中,C轴即绕主轴(Z轴)的回转轴,与其它进给轴联动进行插补,可以实现主轴的精确定位,完成特殊轨迹的加工。在一次装夹中,具有C轴插补功能的机床可实现多工序、复合化加工,大大地提高其加工范围,提高了大型复杂零件的加工精度。高精度重型数控机床是实现大型精密零部件加工的必备设备,机床C轴分度进给系统的设计是提高零件加工精度的关键技术。同时,无间隙、传动刚度高、阻尼特性好、传动效率高的分度装置,是车铣加工中心C轴传动进给系统的必备条件。本文通过对机床分度进给系统的发展和应用的回顾,总结了国内外机床C轴分度进给系统的发展状况,对西门子840D数控系统控制双伺服电机驱动双齿轮消隙、双导程蜗轮蜗杆消除传动间隙的原理分析研究后,初步设计了高精度重型数控机床C轴分度进给系统,并进行了有限元分析和优化设计,最后对机床主轴进行了综合分析、对比分析和算法验证。本文基于Siemens 840D数控系统的预载功能、静力和模态有限元分析以及优化设计理论三者相结合,对机床C轴分度进给系统进行初步设计、有限元协同仿真分析和优化优化。研究结果表明,本文提出的设计方法和分析方案满足机床C轴设计的要求,达到了高精度重型数控机床主轴定位的精度要求,其方法可应用于工程实际问题的分析和设计。关键词回程误差;双伺服电机消隙;C轴控制;精密分度定位哈尔滨工业大学工学硕士学位论文 - II - Abstract C-axis, that is the gyro shaft around the main axis (Z axis), and other feed-axis carried on interpolation, the spindle can achieve precise plete the special path's processing in vehicle mill machining a fixture, The machine tool that has the C axis interpolation function can achieve more processes, composite processing, and greatly enhance the scope of its technology and improve the processing of plex parts of precision. The Heavy and high-C machine tools is the required processing equipment to achieve large-scale precision parts ponents, The design of C-axis feed system of machine tool is the key technology to improve the precise positioning of the spindle. At the same time, The feed device of ceaseless、the highly transmission rigidity、the good damping characteristic、the highly transmission efficiency is the essential condition of C-