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。 缸筒转换套的加工工艺及其钻、攻螺纹孔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：缸筒转换套，加工工艺，夹具设计，工序，切削 Abstract This desig
n i
nvolves mecha
nical ma
nufacturi
ng tech
nology a
nd machi
ne tool fixture desig
n, metal cutti
ng machi
ne tools, tolera
nce coordi
natio
n a
nd measureme
nt a
nd so o
n. The processi
ng tech
nology of the cyli
nder tube tra
nsfer sleeve a
nd the fixture desig
n of the drill, the tappi
ng hole a
nd the e
nd face of the car are three parts, i
ncludi
ng the process desig
n, the process desig
n a
nd the special fixture desig
n. I
n the process desig
n, the parts are a
nalyzed first, the process of the parts is redesig
ned a
nd the structure of the bla
nk is redesig
ned. The process datum of the parts is selected a
nd the process route of the part is desig
ned. The
n the size calculatio
n of theworki
ng procedure of the parts is calculated, the key is to determi
ne the process equipme
nt a
nd the cutti
ng amou
nt of thevariousworki
ng order; the
n, the key is to determi
ne the amou
nt of the process equipme
nt a
nd the cutti
ng amou
nt. The desig
n of the special fixture is carried out, a
nd the compo
ne
nts of the fixture are desig
ned, such as the positio
ni
ng eleme
nt, the clampi
ng eleme
nt, the guidi
ng eleme
nt, the co
n
necti
ng partswith the machi
ne tool a
nd the other parts. The positio
ni
ng error is calculatedwhe
n the fixture is positio
ned, a
nd the ratio
nality a
nd i
nadequacies of the fixture structure are a
nalyzed, a
nd the desig
n is i
njected i
n the future. It is i
nte
nded to be improved. Keywords: cyli
nder co
nversio
n sleeve, processi
ng tech
nology, fixture desig
n, process, cutti
ng 目录 摘要I Abstract II 1前言1 1.1夹具设计中的特点1 1.2夹具设计需保证的条件1 1.3夹具的发展趋势1 2零件的分析2 2.1零件的作用2 2.2零件的工艺分析2 3工艺规程设计3 3.1确定毛坯的制造形式3 3.2基面的选择3 3.3制定工艺路线4 3.4确定各工序的加工余量5 3.6确定切削用量及基本工时8 4钻床夹具设计35 4.1问题提出35 4.2定位基准的选择35 4.3定位元件的设计35 4.4定位误差分析35 4.5切削力的计算与夹紧力分析36 4.6夹具设计及操作简要说明37 结束语38 谢辞39 参考文献40