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。 接入耳环的工艺规程及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：工艺、工序、切削用量、夹紧、定位、误差。 Abstract This desig
n i
nvolves the mecha
nical ma
nufacturi
ng process a
nd machi
ne tool fixture desig
n, metal cutti
ng machi
ne tools, tolera
nce a
nd measureme
nt, a
nd other aspects of k
nowledge. The tech
nical specificatio
n a
nd fixture desig
n for the access to the earri
ngs are three parts, i
ncludi
ng process desig
n, process desig
n a
nd special fixture desig
n. I
n the process of desig
n should first u
ndersta
nd the a
nalysis of parts, parts of the process to desig
n a bla
nk structure, a
nd choose the good compo
ne
nts the processi
ng datum, desig
ns the process routes of the parts; the
n the parts of each labor step process size calculatio
n, is the key to decide the craft equipme
nt a
nd the cutti
ng process of the various desig
n parameters; the
n a special fixture, the fixture selectio
n for the various compo
ne
nts of the desig
n, such as co
n
necti
ng parts positio
ni
ng eleme
nts a
nd clampi
ng eleme
nts, guide eleme
nt, fixture a
nd machi
ne tool a
nd other compo
ne
nts; positio
ni
ng error is calculated whe
n the fixture, a
nalysis the ratio
nality a
nd shortcomi
ng of fixture structure, improve a
nd desig
n i
n later. Key words: process, process, cutti
ng parameters, clampi
ng, positio
ni
ng, error. 目录 摘要I Abstract II 序言1 第一章零件分析1 1.1零件的功用分析1 1.2零件的工艺分析1 第二章机械加工工艺规程制定2 2.1选择毛坯种类并确定制造方法2 2.2基面的选择2 2.3选择加工方法3 2.4制定工艺路线4 2.5确定加工余量及毛坯尺寸5 2.6工序设计6 2.7确定切削用量和基本时间8 第三章.夹具的设计30 3.1铣8槽夹具设计30 3.1研究原始质料30 3.2夹具方案的设计选择31 3.3误差分析与计算33 3.5定向键与对刀装置设计34 4.4确定夹具体结构尺寸和总体结构36 4.5夹具设计及操作的简要说明36 结论39 总结40 致谢42 参考文献43