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。 拨叉加工工艺规程及其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。 ABSTRCT This desig
n co
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nt has i
nvolved the machi
ne ma
nufacture craft a
nd the e
ngi
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n, the metal-cutti
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nological desig
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n as well as the u
nit clamp desig
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n the a
nalysis i
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nts, u
nderstood the compo
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ns the semi fi
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ns the compo
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nts the craft route; After that is carryi
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n the size computatio
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nts each labor step of worki
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ng procedure the craft equipme
nt a
nd the cutti
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ns; The
n carries o
n the u
nit clamp the desig
n, the choice desig
ns the jig each compositio
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nd the e
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nectio
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n error which calculates the jig locates whe
n produces, a
nalyzes the jig structure the ratio
nality a
nd the deficie
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nd will desig
n i
n later pays atte
ntio
n to the improveme
nt. Keywords: The craft, the worki
ng procedure, the cutti
ng specificatio
ns, clamp, the localizatio
n, the error 目录 序言1 一零件的分析2 1.1零件的作用2 1.2零件的工艺分析2 二工艺规程设计4 2.1确定毛坯的制造形式4 2.2基面的选择4 2.3制定工艺路线6 2.4机械加工余量、工序尺寸及毛皮尺寸的确定8 2.5确立切削用量及基本工时9 三夹具设计17 3.1问题的提出17 3.2定位基准的选择17 3.3切削力及夹紧力计算19 3.4定位误差分析21 3.5夹具设计及操作简要说明22 总结23 致谢24 参考文献25