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。 车床离合器齿轮和五槽铣（即铣深8槽）的夹具设计是包括零件加工的工艺设计、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：车床离合器齿轮；五槽铣；夹具设计；工序；工艺；切削用量 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. The fixture desig
n of lathe clutch gear a
nd five groove milli
ng(that is, milli
ng depth 8 grooves) i
ncludes three parts: process desig
n of parts processi
ng, process desig
n a
nd special fixture desig
n. 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: lathe clutch gear; five-groove milli
ng; fixture desig
n; process; tech
nology; cutti
ng parameters 目录 第1章前言1 1.1课题背景1 1.2目的1 1.3选题的依据及意义1 1.4夹具的发展趋势2 第2章零件的分析3 2.1零件的作用3 2.2零件的分析3 第3章工艺规程设计5 3.1确定毛坯的制造形式5 3.2基面的选择5 3.3制订工艺路线6 3.4加工设备及工艺装备的选择7 3.5机械加工余量的确定8 3.6确定切削用量及基本工时8 第4章夹具设计23 4.1问题提出23 4.2定位机构23 4.3夹紧机构24 4.4机床夹具的总体形式26 4.5绘制夹具零件图27 4.6绘制夹具装配图28 总结30 参考文献31