大直径辊筒双头镗孔专机设计.pdf

本科毕业设计（论文）通过答辩 摘 要 本论文是关于大直径辊筒双头镗孔设计说明。首先，本文简要概述了课题的选 题背景及发展现状，对双头镗孔专机的加工对象锡林辊筒及道夫辊筒进行了结构和 加工工艺的分析。其次，根据承载装置和自定心装置的性能要求进行了方案的拟定 并在方案对比分析的基础上确定出了相对合理的方案。承载装置对锡林辊筒与道夫 辊筒的定位采用类似 V 形面的定位方式，驱动方式为减速电动机齿轮传动。自定心 装置采用带双矩形导轨的可移动箱体实现三个旋转轴的同时进给，采用液压缸驱动 六杆机构运动进而实现自定心装置的三个旋转轴同步转动。同时，对方案中用到的 电动机、液压缸、扭杆弹簧进行了计算选择及连杆机构的运动确定性的验证。最后， 校核了承载装置中驱动轴的强度及轴承的寿命，并在结论中总结了本设计的优点和 创新点，对方案中存在的问题进行了分析并提出了改进方向。 关键词： 承载装置 自定心装置 六杆机构 I 本科毕业设计（论文）通过答辩 Abstract This thesis is a piece of explanation of design that about the bearing and self-centering device of the specialized and two-headed boring machine to process the big diameter roller. Firstly, these papers briefly summarize the background and development present situation of the topic. It also analyze the structure and processing manufacturability of cylinder and doffer rollers which was processedby specialized and two-headed boring machine. Secondly, according to the performance requirement of the bearing and self-centering device to make the project block in, then on the basis of the project analysis make out a relatively reasonable project. The cylinder and doffer rollers are located by the V-shaped surface and the drive mode is reducer motors gear transmission. Self-centering device adopt the removable tank body with double rectangular guide rail to realize three axis remove in the meantime. It also adopts hydraulic cylinder driving mechanism drive linkage mechanism to realize the three axes rotate meanwhile. At the same time, makes a calculation and choice to the motor and hydraulic cylinder used in the project. Finally, checks the strength of drive shaft and bearing life of be