CA10B解放牌汽车前刹车调整臂外壳的机械加工工艺及夹具设计

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XXXX大学

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题 目： 前刹车调整臂外壳的机械加工工艺规程

指导教师： 职称: 职称:

20**年12月5日

毕业设计（论文）任务书

摘要

调整臂外壳的加工工艺及专用夹具设计，考虑到零件在机床运行过程中所受冲击不大，零件结构又比较简单，故选择铸造。调整臂外壳的主要加工面是调整臂的几个端面、方槽和孔，由于面的加工精度要比孔的加工精度容易保证。因此，采用先面后孔的原则，以保证加工精度。该设计中，应先以大端外圆加工出两端面，再以该基准面加工小段端面和相应的孔。在其余工序中，均以此孔与端面为定位基准，加工调整臂的孔、槽和一些端面，在整个加工过程中，用到了车床、铣床和钻床。为了加工精确快速，特别设计了铣侧面、镗孔和铣槽的专用夹具，并对它们的定位都采用了一面两销定位。由于该零件的尺寸不大，所需的夹紧力不大。因此，夹紧方式都采用手动夹紧，它的夹紧方式简单，机构的设计更为方便，满足夹紧要求。

关键词： 调整臂外壳零件，毛坯，加工工序，切削用量，专用夹具，装夹

ABSTRACT

Adjusting arm housing processing technology and special fixture design，Taking into account the parts in the machine is not running during the hardest hit, spare parts and relatively simple structure, so select the cast. Adjusting arm housing the main processing area is to adjust a few arm end, square slots and openings, due to surface precision machining accuracy than the hole is hard to guarantee. Therefore, using the principles of the hole after the first plane to ensure accuracy. The design should be the first to be processed into both ends of the big end of cylindrical surface, then the base-level face processing in short sections and the corresponding hole. In the remaining processes are positioning this as the base hole and face processing adjustment arm holes, slots, and some face in the whole process, the use of the lathe, milling and drilling. In order to precise and rapid processing, specially designed side milling, boring and milling slot fixture, and their positioning have adopted the two side pin positioning. As the size of the parts is not required clamping force is not big. Therefore, the clamping means are manually clamped, clamping it simple, more convenient for the design of institutions to meet the clamping requirements.

Key words: Adjustment arm shell parts, rough, processing technology, a dedicated fixture, positioning, clamping

目录

摘要 ................................................................................................................. 3

ABSTRACT ................................................................................................... 4

目录 ................................................................................................................. 5

第一章 绪论 ................................................................................................. 1

第二章 概述 ................................................................................................. 1

2.1夹具夹紧装置及夹具体的基本要求 ....................................................................... 2

2.2机床夹具功用 ........................................................................................................... 2

2.3机床夹具在机械加工中的作用 ............................................................................... 3

2.4机床夹具组成 ........................................................................................................... 3

2.5机床夹具的分类 ....................................................................................................... 4

2.6机床夹具的设计要求 ............................................................................................... 6

2.7现代机床夹具的发展发向 ....................................................................................... 6

第三章 零件的分析 ..................................................................................... 7

3.1零件的作用 ............................................................................................................... 7

3.2零件的工艺分析 ....................................................................................................... 8

第四章 工艺规程设计 ................................................................................... 8

4.1确定毛坯的制造形式 ............................................................................................... 9

4.2基准的选择 ............................................................................................................... 9

4.3制定工艺路线 ........................................................................................................... 9

4.4机械加工余量及毛坯尺寸的确定 ......................................................................... 11

4.5确立切削用量及基本工时 ..................................................................................... 14

第五章 夹具设计 .........................................................................................32

5.1Φ13.8孔和Φ16沉孔加工钻床夹具设计 ............................................................... 32

5.2 定位基准的选择 .................................................................................................... 32

5.3 切削力和夹紧力的计算 ........................................................................................ 33

5.4定位误差分析 ......................................................................................................... 33

5.5 夹具设计及操作的简要说明 ................................................................................ 34

参考文献 .......................................................................................................35

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