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。 本次课题伸出支架梁的工艺规程制定和镗Φ55孔的专用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：伸出支架梁；镗Φ55孔；专用夹具；工序设计；切削用量 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. This project exte
nds the tech
nical specificatio
n for the support beam to make a
nd bori
ng the special fixture desig
n of the 55 holes, i
ncludi
ng 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: exte
ndi
ng support beam; bori
ng 55 holes; special fixture; process desig
n; cutti
ng parameter 目录 摘要I Abstract II 1工艺规程制定1 1.1机械加工工艺规程制订1 1.2机械加工工艺规程的组成1 1.3制订机械加工工艺规程的原始资料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 2.3零件的结构工艺性分析2 3工艺规程设计4 3.1确定毛坯的制造形式4 3.2基面的选择4 3.3确定各工序的加工余量5 3.4制订工艺路线7 3.5确定切削用量以及时间定额8 4镗床夹具设计26 4.1问题的提出26 4.2定位基准的选择26 4.3定位元件的设计26 4.4定位误差分析26 4.5切削力的计算与夹紧力分析27 4.6夹具设计及操作简要说明27 谢辞28 参考文献29