摘要
此次设计是对拨叉零件的加工工艺和夹具设计,其零件为锻件,具有体积小,零件复杂的特点,由于面比孔易加工,在制定工艺规程时,就先加工面,再以面为基准来加工其它,其中各工序夹具都采用专用夹具,特别的对于加工大头孔、槽和钻小头孔斜面小孔的工序中,选一面两销的定位方式,并以操作简单的手动夹紧方式夹紧,其机构设计简单,方便且能满足要求。
关键词拨叉,加工工艺,专用夹具,设计
ABSTRACT
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n 目录 摘要I ABSTRACT 1 1绪论1 2拨叉的分析2 2.1拨叉的工艺分析2 2.2拨叉的工艺要求2 3工艺规程设计5 3.1加工工艺过程5 3.2确定各表面加工方案5 3.2.1影响加工方法的因素5 3.2.2加工方案的选择6 3.3确定定位基准6 3.2.1粗基准的选择6 3.2.1精基准选择的原则7 3.4工艺路线的拟订7 3.4.1工序的合理组合8 3.4.2工序的集中与分散8 3.4.3加工阶段的划分9 3.4.4加工工艺路线方案的比较10 3.5拨叉的偏差,加工余量,工序尺寸及毛坯尺寸的确定12 3.5.1毛坯的结构工艺要求12 3.5.2拨叉的偏差计算12 3.6确定切削用量及基本工时(机动时间) 14 3.7时间定额计算及生产安排22 4钻孔夹具设计25 4.1研究原始质料25 4.2定位基准的选择25 4.3切削力及夹紧力的计算25 4.4误差分析与计算26 4.5零、部件的设计与选用27 4.5.1定位销选用27 4.5.2夹紧装置的选用28 4.5.3钻套、衬套、钻模板设计与选用28 4.6夹具设计及操作的简要说明29 结论30 参考文献31 致谢32
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n is to dials forks the compo
ne
nts the processi
ng craft a
nd the jig desig
n, its compo
ne
nts are the forgi
ng, has thevolume to be small, compo
ne
nts complex characteristic,Because the surface is easier tha
n the hole to process,whe
n formulatio
n tech
nological process, first the machi
ned surface, the
n processes other take the surface as the datum,I
nwhichvariousworki
ng procedures jig all uses the u
nit clamp, special regardi
ng processes the big e
nd of hole, the trough a
nd drills the capitellum hole i
ncli
ne eyelet i
n theworki
ng procedure, Chooses locate modewhich two sells at the same time, a
nd operates the simple ma
nual clampway clamp, its orga
nizatio
n desig
n is simple, the co
nve
nie
nce also ca
n satisfy the request. Keywords: Dials the fork, the processi
ng craft, u
nit clamp, desig
n 目录 摘要I ABSTRACT 1 1绪论1 2拨叉的分析2 2.1拨叉的工艺分析2 2.2拨叉的工艺要求2 3工艺规程设计5 3.1加工工艺过程5 3.2确定各表面加工方案5 3.2.1影响加工方法的因素5 3.2.2加工方案的选择6 3.3确定定位基准6 3.2.1粗基准的选择6 3.2.1精基准选择的原则7 3.4工艺路线的拟订7 3.4.1工序的合理组合8 3.4.2工序的集中与分散8 3.4.3加工阶段的划分9 3.4.4加工工艺路线方案的比较10 3.5拨叉的偏差,加工余量,工序尺寸及毛坯尺寸的确定12 3.5.1毛坯的结构工艺要求12 3.5.2拨叉的偏差计算12 3.6确定切削用量及基本工时(机动时间) 14 3.7时间定额计算及生产安排22 4钻孔夹具设计25 4.1研究原始质料25 4.2定位基准的选择25 4.3切削力及夹紧力的计算25 4.4误差分析与计算26 4.5零、部件的设计与选用27 4.5.1定位销选用27 4.5.2夹紧装置的选用28 4.5.3钻套、衬套、钻模板设计与选用28 4.6夹具设计及操作的简要说明29 结论30 参考文献31 致谢32
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