机械5

摘要 本次设计内容涉及了机械制造工艺及机床夹具设计、金属切削机床、公差配合与测量等多方面的知识。 减速器箱盖的加工工艺规程和铣前端面的工艺设计、工序设计以及专用夹具的设计三部分。在工艺设计中要首先对零件进行分析，了解零件的工艺再设计出毛坯的结构，并选择好零件的加工基准，设计出零件的工艺路线；接着对零件各个工步的工序进行尺寸计算，关键是决定出各个工序的工艺装备及切削用量；然后进行专用夹具的设计，选择设计出夹具的各个组成部件，如定位元件、夹紧元件、引导元件、夹具体与机床的连接部件以及其它部件；计算出夹具定位时产生的定位误差，分析夹具结构的合理性与不足之处，并在以后设计中注意改进。 关键词：减速器箱盖;加工工艺;专用夹具;切削用量，夹紧，定位，误差。 Abstract This desig
n i
nvolves the k
nowledge of machi
ne ma
nufacturi
ng tech
nology a
nd fixture desig
n, metal cutti
ng machi
ne tools, tolera
nce matchi
ng a
nd measureme
nt, etc. Processi
ng procedure of reducer cover, process desig
n of milli
ng fro
nt face, process desig
n a
nd desig
n of special fixture are three parts. I
n the process desig
n,we should first a
nalyze the parts, u
ndersta
nd the process of the parts, the
n desig
n the structure of the bla
nk, a
nd select the processi
ng be
nchmark of the parts, the
n desig
n the process route of the parts; the
n calculate the size of the parts i
n each step, the key is to determi
ne the process equipme
nt a
nd cutti
ng parameters of each step; a
nd the
n desig
n the special fixture, select a
nd desig
n the fixture. Each compo
ne
nt, such as positio
ni
ng eleme
nt, clampi
ng eleme
nt, guidi
ng eleme
nt, fixture body a
nd machi
ne tool co
n
necti
ng parts a
nd other compo
ne
nts, calculates the positio
ni
ng error of fixture positio
ni
ng, a
nalyses the ratio
nality a
nd shortcomi
ngs of fixture structure, a
nd pays atte
ntio
n to improveme
nt i
n future desig
n. Keywords: reducer cover; processi
ng tech
nology; special fixture; cutti
ng parameters, clampi
ng, positio
ni
ng, error. 目录 前言1 第1章计算生产纲领、生产效率分析2 1.1生产纲领2 1.2生产效率分析2 1.3确定生产纲领3 第2章零件的分析4 2.1零件的作用4 2.2零件的各项技术要求4 2.3结构工艺性分析5 第3章工艺规程设计6 3.1确定毛坯的制造形式6 3.2基面的选择6 3.3选择加工方法7 3.4制定工艺路线7 3.5确定各表面的加工余量9 3.6确定切削用量及基本工时11 第4章夹具设计27 4.1定位基准的选择27 4.2切削力及夹紧力的计算27 4.3定位误差分析28 4.4夹具设计及操作的简要说明28 4.5机床夹具的总体形式28 谢辞30 参考文献31