摘要组合机床是根据工件加工需要，以大量通用部件为基础，配以少量专用部件组成的一种高效专用机床。本课题所设计的组合机床是用于摩托车发动机外壳三面同时钻孔，提高了生产效率，降低加工成本。设计内容包括总体设计和主轴箱设计。首先是总体设计，采用单工位三面钻孔组合机床，考虑的因素有刀具、切削用量、切削力、切削扭矩及切削功率等，通过计算选择主轴直径、外伸尺寸、接杆型号、滑台、动力箱等通用部件，再确定动力部件的工作循环及工作行程，完成机床总体设计。其次是主轴箱设计,通过对被加工零件的全面分析,绘制主轴箱设计原始依据图；确定主轴结构、轴颈及齿轮模数；完成动力计算、设计传动系统；绘制主轴箱装配图和零件补充加工图。该组合机床不仅能保证加工精度，而且整个机床布局合理，夹紧可靠，精度较高，使用操作方便，提高了工作效率，达到了设计要求。43658

毕业论文关键词：摩托车发动机外壳；组合机床；主轴箱

Abstract

Combination machine is a toll according to workpiece machining needs with a large number of common parts for the foundation and a small number of dedicated components of special machine. My issue designing for the combined machine tool is used for motorcycle engine shell of three side holes to improve production efficiency and reduce processing costs. The system and the headstock design are included in the design content. First using single station three drill hole modular machine tool which conside such factors as tool、cutting parameters、cutting force、cutting torque and cutting power and selected by calculating the diameter of spindle、overhang、 connecting rod type、table、the power box and other general parts is the overall design, then determine the dynamic components of the work cycle and the working stroke and complete the machine tool design. Second drawing the spindle box design; determining the spindle structure and the module of gear shaft; completing power calculation and the design of transmission system of spindle box; drawing assembly drawings and parts of the supplementary processing map based on the original plan is the headstock design. The combined machine tool which improves the work efficiency has achieved the design requirements can not only guarantee the machining accuracy of the machine tool but also the layout is reasonable、the clamping is reliable、the precision is higher、operating convenient.

Key words: Motorcycle engine shell；Modular machine tool；Headstock

目录

第一章 前言 1

1.1组合机床设计概况 1

1.2组合机床设计思路 1

1.3组合机床发展方向 1

1.4组合机床在国内外的发展状况 2

第二章 组合机床总体设计 3

2.1总体方案论证 3

2.1.1加工对象工艺性的分析： 3

2.1.2机床总体布局的确定： 3

2.1.3定位基准的选择： 4

2.1.4滑台型式的选择： 5

2.2切削用量的确定及刀具选择 6

2.2.1切削用量的选择： 6

2.2.2切削力、切削扭矩及切削功率的计算： 7

2.3组合机床总体设计—“三图” 9

2.3.1被加工零件工序图