挡环的加工工艺及钻2-Φ3.5深5孔夹具设计 摘要 在经济飞速向前的当下，制造业快速发展的今天。非标零件的尺寸、结构也千变万化。以往设计的通用夹具，越来越多的面临淘汰。所以专用夹具的设计与生产越来越广泛。专用夹具的研究其主要内容有定位方案、夹紧方案的确定，定位元件、夹紧元件的选择，导向装置的选择等等。 本次设计研究的对象是挡环。设计内容包括2个方面：1、工艺分析；2、钻2-Ф3.5孔钻床专用夹具设计。挡环是机械机构中不可或缺的零件之一，为零部件提供密封空间，为零部件的正常运转提供保障。 从零件结构分析入手，合理选择定位基准，各种刀具参数选择以及切削用量的选择等。在安排工艺过程时，根据加工要求不同，需要进行粗精加工。另外还确定了切削参数，加工工时，填写工艺过程卡片和工序卡片。专用夹具设计内容有：确定定位方案及元件，确定夹紧方案及元件，确定导向装置，计算切削力及夹紧力等。 关键词：挡环、工艺、2-Ф3.5孔、钻床、专用夹具 Abstract With the rapid developme
nt of the eco
nomy, ma
nufacturi
ng i
ndustry is developi
ng rapidly today. The size a
nd structure of
no
n-sta
ndard parts are also ever-cha
ngi
ng. I
n the past, more a
nd more commo
n fixtures have bee
n elimi
nated. Therefore, the desig
n a
nd productio
n of special fixture are more a
nd more exte
nsive. The mai
n co
nte
nts of the research of special fixture i
nclude positio
ni
ng scheme, clampi
ng scheme determi
natio
n, positio
ni
ng eleme
nt, clampi
ng eleme
nt selectio
n, guidi
ng device selectio
n a
nd so o
n. The object of this desig
n study is the retai
ni
ng ri
ng. The desig
n i
ncludes 2 aspects: 1, process a
nalysis; 2, drill 2- drill 3.5 hole drilli
ng fixture desig
n. The retai
ni
ng ri
ng is o
ne of the i
ndispe
nsable parts i
n the mecha
nical mecha
nism,which provides seali
ng space for the parts a
nd guara
ntees the
normal operatio
n of the parts. Starti
ng from the a
nalysis of part structure, the locatio
n datum, tool parameters a
nd cutti
ng parameters are selected reaso
nably. Whe
n arra
ngi
ng the tech
nological process, rough fi
nishi
ng is required accordi
ng to differe
nt processi
ng requireme
nts. I
n additio
n, cutti
ng parameters, machi
ni
ng hours, process process cards a
nd process cardswere determi
ned. The desig
n co
nte
nts of special fixture i
nclude: determi
ni
ng the positio
ni
ng scheme a
nd compo
ne
nts, determi
ni
ng the clampi
ng scheme a
nd compo
ne
nts, determi
ni
ng the guidi
ng device, calculati
ng the cutti
ng force a
nd clampi
ng force, etc. Keywords: retai
ni
ng ri
ng, process, 2- 3.5 hole, drilli
ng machi
ne, special fixture 目录 摘要I Abstract II 1绪论1 1.1机床夹具的分类1 1.2机床夹具的发展趋势2 2零件的作用、组成表面及技术要求3 2.1零件的作用3 2.2零件的组成表面3 2.3零件的技术要求4 2.4零件的形位公差4 3零件的工艺分析及设计5 3.1确定零件的生产类型及毛坯的制造形式5 3.1.1确定零件的生产类型5 3.1.2确定毛坯的制造形式5 3.2基准的选择与确定5 3.3加工工艺路线的确定6 3.4加工设备及加工装备的选择7 3.5确定加工余量7 3.6计算切削用量、基本时间及辅助时间9 4钻2-Ф3.5孔专用夹具设计19 4.1定位方案及装置的确定19 4.1.1设计定位方案应满足的要求19 4.1.2定位方案的确定19 4.1.3定位元件的确定19 4.2夹紧方案及装置的确定20 4.2.1设计夹紧装置应遵循的原则20 4.2.2夹紧方案的确定21 4.2.3夹紧元件的确定21 4.3夹具体的设计21 4.4确定导向装置—钻套23 4.5计算切削力23 4.6计算夹紧力23 4.7分析与计算定位误差24 5结论26 6致谢27 参考文献28