机械5

KST1002换挡拨叉的加工工艺及铣19上端面夹具设计 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KST1002换挡拨叉的加工工艺及铣19上端面夹具设计。由于该零件需要大批量生产，所以设计一个铣床专用夹具，保证零件的加工质量。专用夹具的利用率高，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。 完成夹具的所有设计后，用AutoCAD进行二维图的绘制，首先画零件图、毛坯图，然后绘制装配图及夹具体零件图等。标注相关尺寸及技术要求，最后进行说明书的撰写、整理、修改完成该课程设计，达到了教学要求。为以后的学习和工作夯实了基矗 关键词：KST1002、换挡拨叉、工艺、19上端面、夹具 Abstract With the rapid developme
nt of ma
nufacturi
ng i
ndustry, the desig
n a
nd ma
nufacture of jig also greeted its developme
nt i
n spri
ng. Jig is the clampi
ng device for parts processi
ng,which is a
n esse
ntial device for processi
ng parts. The fixture has the adva
ntages of high utilizatio
n rate, good eco
nomy, a
nd less use a
nd qua
ntity of fu
nctio
nal compo
ne
nts. Whe
n desig
ni
ng the special fixture,we should co
nsider the positio
ni
ng scheme of theworkpiece, the clampi
ng scheme of theworkpiece a
nd the desig
n of the clampi
ng mecha
nism, other parts of the fixture, the structure of the fixture a
nd so o
n. The theme of this desig
n is KST1002 shifti
ng fork processi
ng tech
nology a
nd milli
ng 19 upper e
nd fixture desig
n. Because the part
needs mass productio
n, a special fixture for milli
ng machi
ne is desig
ned to e
nsure the processi
ng quality of the part. The special fixture has the adva
ntages of high utilizatio
n rate, good eco
nomy, stro
ng fu
nctio
n a
nd small qua
ntity of compo
ne
nts, low matchi
ng cost, a
nd low productio
n cost. The clampi
ng device ca
n shorte
n the dow
ntime a
nd improve productio
n efficie
ncy. After all the fixture desig
ns are completed, the two-dime
nsio
nal drawi
ngs are draw
n by AutoCAD. Firstly, the part drawi
ngs a
nd the bla
nk drawi
ngs are draw
n, the
n the assembly drawi
ngs a
nd the fixture parts drawi
ngs are draw
n. Label the releva
nt size a
nd tech
nical requireme
nts, a
nd fi
nallywrite, collate, modify the i
nstructio
ns to complete the course desig
n, to meet the teachi
ng requireme
nts. It lays a solid fou
ndatio
n for future study a
ndwork. Keywords: KST1002, shift fork, process, 19 upper e
nd face, jig 目录 摘要I Abstract II 1绪论1 1.1机床夹具的发展1 1.2机床夹具设计的基本要求1 2零件分析及毛坯的选择2 2.1零件的作用2 2.2零件分析3 2.2.1组成表面3 2.2.2技术要求3 2.2.3形位公差3 2.3毛坯的选择4 2.3.1选择毛坯的原则4 2.3.2零件毛坯的选择及制造方法4 3拟定工艺路线6 3.1定位基准的选择6 3.1.1粗基准的选择6 3.1.2精基准的选择6 3.2加工工艺路线选择、比较与确定7 3.3加工设备、夹具、刀具及量具的选择8 4加工余量、切削用量及切削时间的确定11 4.1加工余量的确定11 4.2切削用量及切削时间的确定13 5铣削19上端面夹具设计30 5.1定位方案的确定30 5.2定位元件的确定30 5.3夹紧方案的确定31 5.4夹紧元件的确定32 5.5夹具体的确定32 5.6导向装置的确定33 5.7铣削力的计算33 5.8夹紧力的计算34 5.9定位误差分析34 结论35 致谢36 参考文献37