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。 设计选取机床拨叉零件为被加工件，设计中包含了加工工艺规程制定、工序设计以及铣Φ37圆环面专用夹具设计三部分。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：机床拨叉；加工工艺；工序；专用夹具；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 fork parts of the machi
ne tool are selected as the processed parts. The desig
n i
ncludes three parts: the formulatio
n of the processi
ng procedure, the desig
n of theworki
ng procedure a
nd the desig
n of the special fixture for milli
ng 37 torus. 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,we ca
n choose the processi
ng be
nchmark of the parts. The desig
n of the special fixture is carried out, a
nd the compo
ne
nts of the fixture are selected, such as positio
ni
ng eleme
nts, clampi
ng eleme
nts, guidi
ng eleme
nts, co
n
necti
ng parts betwee
n fixture body a
nd machi
ne tool, a
nd other compo
ne
nts. The positio
ni
ng errors caused by fixture positio
ni
ng are calculated, the ratio
nality a
nd shortcomi
ngs of fixture structure are a
nalyzed, a
nd the desig
n
notes are give
n i
n the future. I
nte
ntio
n to improve. Keywords: machi
ne tool fork; processi
ng tech
nology; process; special fixture; cutti
ng parameters 目录 摘要1 Abstract 2 第1章绪论1 1.1课题背景1 1.2目的1 1.3夹具设计中的特点1 1.4夹具设计需保证的条件2 1.5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 2.2零件的工艺分析3 第3章工艺规程设计4 3.1确定毛坯的制造形式4 3.2机械加工余量的确定4 3.3基面的选择4 3.4加工工艺路线6 3.5确定切削用量及基本工时7 第4章铣Φ37圆环面专用夹具设计18 4.1问题的提出18 4.2定位基准的选择18 4.3定位误差分析18 4.4切削力的计算与夹紧力分析19 4.5夹具设计及操作简要说明20 参考文献21 结束语23 心得体会24