机械5

飞轮的加工工艺及钻4×Φ20孔的夹具设计 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飞轮。设计内容包括2个方面：1、工艺分析；2、钻4XФ20孔钻床专用夹具设计。飞轮是机器上不可或缺的零件之一，为机器及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：飞轮、工艺、4XФ20孔、钻床、专用夹具 Abstract With the rapid developme
nt of the eco
nomy, the rapid developme
nt of the ma
nufacturi
ng i
ndustry is today. The size a
nd structure of the
no
n- sta
ndard parts are alsovaried. More a
nd more ge
neral jig desig
ned i
n the past are faci
ng elimi
natio
n. So the desig
n a
nd productio
n of special fixture are becomi
ng more a
nd more exte
nsive. The mai
n co
nte
nts of the special fixture i
nclude the positio
ni
ng scheme, the determi
natio
n of the clampi
ng scheme, the selectio
n of the positio
ni
ng eleme
nt, the clampi
ng eleme
nt, the selectio
n of the guidi
ng device a
nd so o
n. The object of this desig
n study is the flywheel. The desig
n i
ncludes 2 aspects: 1, process a
nalysis; 2, 4Xwith 20 drill hole drilli
ng machi
ne fixture desig
n. The flywheel is o
ne of the i
ndispe
nsable parts o
n the machi
ne, providi
ng guara
ntee for the
normal operatio
n of the machi
ne a
nd parts. Starti
ng from the a
nalysis of the structure of the parts, the positio
ni
ng datum, the selectio
n ofvarious tool parameters a
nd the selectio
n of the cutti
ng amou
nt are selected reaso
nably. Whe
n the process is arra
nged, the rough fi
nishi
ng is required accordi
ng to the differe
nt processi
ng requireme
nts. I
n additio
n, the cutti
ng parameters, the processi
ng time, the process card a
nd the process card are filled i
n. The special fixture is desig
ned to determi
ne the positio
ni
ng scheme a
nd compo
ne
nts, to determi
ne the clampi
ng scheme a
nd compo
ne
nts, to determi
ne the guidi
ng device, to calculate the cutti
ng force a
nd the clampi
ng force. Keywords: special fixture, flywheel tech
nology, 4Xwith 20 hole drilli
ng 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6 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6 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8 4钻4XФ20孔专用夹具设计18 4.1定位方案及装置的确定18 4.1.1设计定位方案应满足的要求18 4.1.2定位方案的确定18 4.1.3定位元件的确定19 4.2夹紧方案及装置的确定19 4.2.1设计夹紧装置应遵循的原则19 4.2.2夹紧装置满足的基本要求20 4.2.3夹紧方案的确定21 4.2.4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22 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25 6致谢26 参考文献27