机械5

某型离合器拨叉的铣拨叉脚两端面夹具设计及加工工艺装备 摘要 伴随制造业的飞速发展，夹具的设计及制作也迎来了其发展的春天。夹具是零件加工的夹紧装置，是加工零件的一种必不可少的装置。夹具利用率高，经济性好，对功能组件的使用和数量少。在设计专用夹具时要考虑工件的定位方案，工件的夹紧方案和设计夹紧机构，夹具的其他组成部分，夹具的结构形式等。 本次设计的题目是某型离合器拨叉加工工艺及工艺装备设计。该零件属于拨叉类零件，在加工时其精度有相应的要求。因此一定要设计合适的夹具方能确保所有工序的完成，由于该零件需要大批量生产，本次设计是专用夹具铣削叉脚两端面铣削专用夹具设计，保证零件的加工质量。由于夹具的利用率高，经济性好，使用元件的功能强并且数量少，配套费用低，降低了生产成本；采用夹紧装置，缩短停机时间，提高生产效率。 完成铣床夹具的所有设计后，用AutoCAD进行二维图形的绘制。标注相关尺寸及技术要求，最后进行的撰写、整理、修改完成该设计，达到了教学要求。为以后的学习和工作夯实了基矗 关键词：离合器拨叉、加工工艺、叉脚两端面、铣削 Abstract With the rapid developme
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ng, fixture desig
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n the spri
ng of its developme
nt. Jig is clampi
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n esse
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n is high, the eco
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nd qua
ntities. I
n the desig
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nsiderwhe
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ng schemeworkpiece clampi
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nd desig
n of theworkpiece clampi
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nts of the jig, fixture a
nd other structure. This topic is desig
ned to process a certai
n type of clutch fork desig
n a
nd process equipme
nt. This part belo
ngs to the fork parts, precisio
n i
n the processi
ng of their respective requireme
nts. Therefore,we must desig
n suitable fixture i
n order to e
nsure the completio
n of all the processes, si
nce the parts
needed for mass productio
n, this desig
n is a special fixture milli
ng e
nds face milli
ng pro
ngs special fixture desig
ned to e
nsure processi
ng quality parts. Due to the high utilizatio
n of the jig, the eco
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nd compo
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nts used a small
number of low support costs, reduce productio
n costs; the use of the clampi
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nd improve productio
n efficie
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n completio
n of milli
ng jig all desig
nedwith AutoCAD drawi
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nal graphics. Marked releva
nt dime
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nd fi
nallywriti
ng papers, orga
nize, edit, complete the graduatio
n project, to achieve teachi
ng requireme
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ng a
ndwork to lay a solid fou
ndatio
n. Keywords: Clutch fork, processi
ng, pro
ngs e
nd faces, milli
ng 目录 摘要I Abstract II 第1章绪论3 1.1夹具的发展概括及特点3 1.1.1国外夹具行业的现状3 1.1.2夹具的特点3 1.2夹具的发展要求4 1.3设计夹具体的要点5 第2章零件机械加工工艺规程设计6 2.1零件的作用和工艺分析及生产类型的确定6 2.1.1零件的作用6 2.1.2零件的工艺分析6 2.1.3零件生产类型的确定8 2.2零件工艺规程设计8 2.2.1零件制造形式的确定8 2.2.2基准的选择9 2.3加工工艺路线的确定10 2.4表面加工方法的确定10 2.5工序顺序的安排11 2.6加工余量、工序尺寸和公差的确定12 2.7切削用量及时间定额的计算12 第3章专用夹具的设计14 3.1问题的提出14 3.2夹具设计14 3.2.1对定位元件的基本要求14 3.2.2确定定位方案与定位元件15 3.2.3夹紧装置设计的基本要求及遵循原则15 3.2.4确定夹具方案及夹紧元件15 3.2.5夹具体的确定16 3.2.6铣削力计算和夹紧力分析17 3.2.7夹具设计及操作的主要说明17 结论18 致谢19 参考文献20