机械5

摘要 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。随着零件的尺寸变化，越来越多的夹具被淘汰了，因此，设计一套专用夹具是十分有必要的。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。 本次设计的是对变矩器花键套零件的加工工艺分析及夹具设计。根所选的零件图，在掌握零件作用的基础上，对零件的工艺进行分析。对零件加工过程中铣宽15槽工序进行专用夹具设计。本夹具体是以保证加工精度，生产效率和便于工人操作为宗旨展开的设计。 设计之初我查阅相关数据及国内外关于机床夹具的文献，在看懂零件图的同时对零件的结构和工艺进行分析，明确粗基准和精基准的选择，确定零件的加工余量与毛坯的尺寸、从而确定零件的加工工艺过程、计算各工序的切削用量及工时。最终完成了本次设计所需的夹具。 关键词：专用夹具；定位方案；变矩器花键套；加工工艺；切削用量 Abstract Fixture is a clampi
ng device for parts processi
ng, a
nd it is a
n i
ndispe
nsable device for parts processi
ng. 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. With the size cha
nge of parts, more a
nd more fixtures are elimi
nated, so it is
necessary to desig
n a set of special fixtures. Whe
n desig
ni
ng special fixture,we should co
nsider the positio
ni
ng scheme ofworkpiece, the clampi
ng scheme ofworkpiece a
nd the clampi
ng mecha
nism, the other compo
ne
nts of fixture, the structure form of fixture, etc. This desig
n is to a
nalyze the processi
ng tech
nology of the spli
ne sleeve parts of the torque co
nverter a
nd desig
n the fixture. O
n the basis of masteri
ng the fu
nctio
n of the parts, the process of the parts is a
nalyzed. The special fixture is desig
ned for milli
ng 15 slots i
n the process of parts processi
ng. This fixture body is desig
ned to e
nsure the processi
ng accuracy, productio
n efficie
ncy a
nd easy operatio
n forworkers. At the begi
n
ni
ng of the desig
n, I co
nsulted the releva
nt data a
nd the literature about machi
ne tool fixture at home a
nd abroad, a
nalyzed the structure a
nd process of the partswhile readi
ng the part drawi
ngs, made clear the selectio
n of rough a
nd precise refere
nce, determi
ned the processi
ng allowa
nce of the parts a
nd the size of the bla
nk, thus determi
ned the processi
ng process of the parts a
nd calculated the cutti
ng of each process. Dosage a
ndworki
ng hours. Fi
nally, the fixture required for this desig
n has bee
n completed. Keywords: special fixture; positio
ni
ng scheme; torque co
nverter spli
ne sleeve; processi
ng tech
nology; cutti
ng parameters 目录 摘要I Abstract II 1序言1 2零件的分析2 2.1零件的作用2 2.2零件的工艺分析2 3工艺规程设计4 3.1确定毛坯的制造形式4 3.2确定各工序的加工余量4 3.3制订工艺路线5 3.4确定切削用量以及时间定额6 4铣床夹具设计44 4.1问题的提出44 4.2定位基准的选择44 4.3定位元件的设计44 4.4定位误差分析45 4.5切削力的计算与夹紧力分析45 4.6夹具设计及操作简要说明46 总结47 致谢48 参考文献49