机械5

气门摇杆轴支座零件机械加工工艺及其典型夹具设计 摘要 气门摇杆轴支座是柴油机一个重要零件，是柴油机摇杆座的结合部。本设计在气门摇杆轴支座工艺规程设计过程中，详细的分析了摇杆轴支座的加工工艺，通过工艺方案的比较与分析得到了符合技术要求的工序，形成了机械加工工艺过程卡和机械加工工序卡。并完成钻孔夹具的设计，阐述了定位方案的选择、夹紧方案的确定、夹具体设计，运用AutoCAD完成了此典型夹具的装配图和夹具体的零件图。本设计的加工工艺合理，夹具可行、高效、省力，能满足零件的加工要求，保证其加工质量。 关键词：气门摇杆轴支座；机械加工；加工工艺；典型夹具 Beari
ng Parts Machi
ni
ng Process Valve Rocker Shaft a
nd Its Typical Fixture Desig
n Abstract Valve rocker shaft support is a
n importa
nt part of diesel e
ngi
ne,which is the joi
nt of rocker seat of diesel e
ngi
ne.I
n this desig
n,i
n the process of process specificatio
n desig
n ofvalve rocker shaft support,the processi
ng tech
nologyof rocker shaft support is a
nalyzed i
n detail.Through the compariso
n a
nd a
nalysis of process schemes,the process meeti
ng the tech
nical requireme
nts is obtai
ned,a
nd the machi
ni
ng process card a
nd machi
ni
ng process card are formed.A
nd completed the desig
n of drilli
ng fixture,elaborated the selectio
n of positio
ni
ng scheme,the determi
natio
n of clampi
ng scheme,the specific desig
n of clamp,completed the assemblydrawi
ng of this typical fixture a
nd the specific part drawi
ng of clamp byusi
ng AutoCAD.The processi
ng tech
nologyof this desig
n is reaso
nable,the fixture is feasible,efficie
nt a
nd labor-savi
ng,which ca
n meet the processi
ng requireme
nts of parts a
nd e
nsure the processi
ng quality. Keywords:valve rocker shaft support; machi
ni
ng; processi
ng tech
nology; typical fixture 目录 摘要1 Abstract 2 1绪论2 1.1题目背景和研究意义2 1.2国内外相关研究情况3 1.2.1国内夹具发展史3 1.2.2国外夹具发展史3 1.2.3国内外机床夹具发展现状4 1.3本课题研究的主要内容和拟采用的研究方案4 1.3.1课题研究主要内容4 1.3.2拟采用的研究方案5 2零件的分析6 2.1零件的作用6 2.3零件的工艺分析7 2.4零件的生产类型7 3机械加工工艺规程设计9 3.1确定毛坯的的制造形式9 3.2定位基准的选择9 3.2.1精基准的选择9 3.2.2粗基准的选择10 3.3制定机械加工工艺路线10 3.4工艺方案的比较与分析11 3.5机械加工余量、工序尺寸及毛坯尺寸的确定11 3.6选择加工设备及刀、夹、量具12 3.7确定切削用量及基本工时13 4专用钻孔夹具设计21 4.1导引元件的设计21 4.2夹具精度分析21 4.3夹具夹紧力分析22 结论23 参考文献24