汽车制动蹄圆柱面专用铣床总体及夹具设计【7张图/17600字】【优秀机械毕业设计论文】

文档包括:
说明书一份,41页,17600字左右.

图纸共7张,如下所示
A0-制动蹄圆柱面专用铣床总体.dwg
A0-转动蹄片夹具图.dwg
A0-夹具体.dwg
A1-压紧机构.dwg
A2-传动原理.dwg
A2-拉紧机构.dwg
A2-制动蹄片.dwg

摘要
专用机床是通过缩小机床的工艺用途来实现高效率的机床。这类机床结构较简单，调整和操作方便，自动化程度较高，易于保证质量并有较高的生产率。适于成批生产。根据制动蹄圆柱面的加工要求，采用专用机床加工该工件比较适合。
根据制动蹄圆柱面的加工要求，本设计的主要任务是制动蹄圆柱面专用铣床的总体及夹具设计。全面的考虑整台机床所需的部件以及各个部件的布局，明确各个部件的作用以及技术要求等。从工件出发，分析及确定加工用量，根据切削用量选择动力部件，设计传动链，选择电机的型号。另一方面，夹具的设计是工件能否在这台机床上加工的关键。根据工件的技术要求，分析工件的定位，采用定位销、挡板和支承块定位，限制了工件的六个自由度，保证加工要求。
本设计圆满设计出了一台专门加工制动蹄圆柱面的铣床，解决了工件在车床以及磨床上难加工的问题。另一方面，设计的夹具解决了工件如何定位及夹紧在机床上等问题，从而保证加工稳定，达到加工精度要求。

关键词 专用；总体；制动；自由度

Abstract
Special machine is a machine by reducing the use of technology to achieve high efficiency of the machine. Such machine's structure is relatively simple, easy adjusted, higher degree of automation , easy to guarantee quality and has higher productivity. So it's suitabled for mass production. According to the processing requirements of the brake cylinder, it's more suitable using a special machine to process the work-piece. 
According to the processing requirements of the brake cylinder, The main tasks of the design are to overall design a special milling machine of brake cylinder and the fixture. Roundly considers the necessary components of the whole machine and the layout of the various components. Explicits the function and the technical requirements of each parts. The overall design of this special milling machine begins from the workpiece, analyse and determine the dosage of the process, then choose the motivity parts, design the drive chain, and final choose the choice of the motor base the dosage of the process. The other hand, it's the key whether the work-pieces can be done in this machine processing that the fixture is designed. According to the technical requirements of the work-piece, this fixture uses pins and supporting baffle block positioning to limit the work-piece's 6-DOF and guarantee the processing requirements.
A specialized machine for processing brake cylinder is satisfactorily designed. This machine solves the problem that the work-piece is difficult processed on the lathe and on the grinding machine. The other hand, the fixture solves the problem that how to orientate the work-piece and clamp on the machine. It can ensure the stability of the processing and make to arrive at the precision machining.

Keywords special overall brake DOF 

目 录
1 绪论 1
1.1 设计意义 1
1.2 专用机床概述 1
2 零件分析和加工方案的确定 3
2.1 零件分析 3
2.1.1 零件介绍 3
2.1.2 零件的功用 3
2.1.3 零件的毛坯材料 4
2.2 加工方案的确定 4
3 专用机床总体设计 6
3.1 机床设计的步骤 6
3.2 刀具与工件相对位置的确定 6
3.2.1 设定相对位置尺寸 6
3.2.2 铣削后圆柱面的侧母线 7
3.2.3 参数 、 值大小及精度 9
3.2.4 确定相对位置尺寸 10
3.3铣削用量的确定 10
3.4 确定制蹄片专用铣床总体方案 12
3.5 确定制动蹄片专用铣床的传动 14
3.5.1 减速器的类型与选择 15
3.5.2 电动机的类型与选择 15
3.5.3 传动装置的总传动比及分配 17
3.5.4 计算传动装置的运动和动力参数 17
各轴转速 17
各轴的输入功率 18
各轴的输入转矩 18
3.5.5 V型带的设计与选择 18
3.5.6 齿轮传动设计 20
选择模数 20
3.5.7 轴的校核 22
3.5.8 轴承的选择与校核 24
3.5.9 键的校核 25
4 专用机床夹具的设计 26
4.1机床夹具概述 26
4.2 工件的定位 29
4.2.1 工件在夹具中定位的基本任务 29
4.2.2 制动蹄片圆柱面的定位方法及定位元件 30
4.3 定位误差的分析和计算 30
4.4 制动蹄片圆柱面的夹紧方式分析及计算 32
4.4.1 拉紧机构 32
4.4.2 夹紧机构 34
结论 36
致谢 37
参考文献 38