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。 底座的机械加工工艺规程及钻、铰2-Φ8孔工序的专用夹具设计。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，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，对定位方案及元件，夹紧方案及元件进行确定；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：底座；加工工艺；夹具设计；工艺路线；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. The mecha
nical processi
ng tech
nology of the pedestal a
nd the special fixture desig
n for drilli
ng a
nd hi
nges 2- 8 hole process. I
n the process desig
n, the parts are a
nalyzed first, the process of the parts is redesig
ned a
nd the bla
nk is redesig
ned. The process datum of the parts is selected a
nd the process route of the parts 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 equipme
nt a
nd the cutti
ng amou
nt of each process; a
nd the
n make a special purpose. With the desig
n of the fixture, the positio
ni
ng scheme a
nd compo
ne
nts, the clampi
ng scheme a
nd the compo
ne
nts are determi
ned, the positio
ni
ng error of the fixture positio
ni
ng is calculated, the ratio
nality a
nd i
nadequacies of the fixture structure are a
nalyzed, a
nd the improveme
nt is paid atte
ntio
n to i
n the future desig
n. Keywords: base; processi
ng tech
nology; fixture desig
n; process route; cutti
ng parameter 目录 1加工工艺规程设计1 1.1零件的作用1 1.2零件的工艺分析1 1.3基面的选择1 1.4制定工艺路线2 1.5机械加工余量的确定3 1.6确定切削用量及基本工时6 2专用夹具设计23 2.1问题的提出23 2.2定位基准的选择23 2.3定位误差分析23 2.4切削力的计算与夹紧力分析24 2.5导向装置设计25 2.6夹具设计及操作简要说明27 结束语28 谢辞29 参考文献30