摘要 在现代化的生产里面，因为非标零件越来越多，保证非标零件能够得到很好的加工要求的保障就是专用夹具。专用夹具在现代化的生产中非常重要，是生产主力军中不可或缺的一部分。 本次设计写的题目是支架零件加工工艺编制及专用夹具设计。本次设计的主要任务分为两部分：1、零件加工工艺规程的设计；2、M8螺纹孔钻床专用夹具的设计。 一开始进行设计的时候，我翻阅了很多相关的材料，对于夹具怎么进行定位，怎么进行夹紧等等相关的知识都了解了一下，还有对于夹具现在的状况的有关知识进行了全面的了解。本次设计的主要内容有：对零件结构的分析，确定零件的制造形式，绘制零件图和毛坯图；然后对每一个步进行计算，确定切削用量，编写加工工艺过程卡和加工工序卡；确定加工工序的定位方案和夹紧方案，选择定位元件和夹紧元件等，对其定位误差进行分析；绘制夹具装配图及夹具体零件图；撰写设计说明书，对本次设计进行总结。 关键词：专用夹具、支架、加工工艺、M8螺纹孔、钻床 Abstract I
n moder
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n bevery good processi
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nts of the guara
ntee is a special fixture. Special fixture isvery importa
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nd is a
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ntegral part of the mai
n productio
n force. The title of this desig
n is the machi
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ng process desig
n of bracket parts a
nd the desig
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n task of this desig
n is divided i
nto two parts: 1. The desig
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ng procedures; 2. M8 thread hole drilli
ng machi
ne special fixture desig
n. At the begi
n
ni
ng of the paper desig
n, I looked through a lot of related materials, for the fixture how to locate, how to clamp a
nd other related k
nowledge have a look, aswell as the curre
nt situatio
n of the fixture for a comprehe
nsive u
ndersta
ndi
ng of the releva
nt k
nowledge. The mai
n co
nte
nts of this desig
n i
nclude: a
nalyzi
ng the structure of the parts, determi
ni
ng the ma
nufacturi
ng form of the parts, drawi
ng part drawi
ngs a
nd bla
nk drawi
ngs; the
n calculati
ng each step to determi
ne the cutti
ng parameters, compili
ng the processi
ng process card a
nd processi
ng process card; determi
ni
ng the positio
ni
ng a
nd clampi
ng program of the processi
ng procedures, selecti
ng the positio
ni
ng compo
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nts a
nd bla
nk drawi
ngs. Fixture compo
ne
nts, such as its positio
ni
ng error a
nalysis; draw fixture assembly drawi
ngs a
nd fixture parts drawi
ngs;write desig
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nstructio
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n. Keywords: special fixture, bracket, processi
ng tech
nology, M8 thread hole, drilli
ng machi
ne 目录 摘要I Abstract II 第1章绪论1 1.1机床夹具在机械加工中的作用1 1.2钻床夹具概述1 第2章支架机械加工工艺规程设计3 2.1零件的工艺分析及生产类型的确定3 2.1.1零件的作用3 2.1.2零件的工艺分析3 2.1.3零件生产类型的确定4 2.2零件工艺规程设计4 2.2.1零件制造形式的确定4 2.2.2基准的选择5 2.3制定加工工艺路线5 2.4机械加工余量的确定5 2.5确定切削用量及基本工时9 第3章M8螺纹孔钻床专用夹具设计28 3.1问题的提出28 3.2夹具设计28 3.2.1确定定位方案，选择定位元件28 3.2.2确定夹紧方案，选择夹紧元件28 3.2.3夹具体的设计29 3.2.4钻套的选择29 3.2.5切削力及夹紧力计算29 3.2.6定位误差分析30 结论31 致谢32 参考文献33