机械5

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。并完成了铣削和车削以及钻孔夹具的设计，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 beari
ng is a
n importa
nt part of the diesel e
ngi
ne, is a combi
natio
n of diesel e
ngi
ne rocker seat. This graduatio
n desig
n i
n valve rocker shaft beari
ng process desig
n process, a detailed a
nalysis of the process of the rocker shaft beari
ng, meet the tech
nical requireme
nts of the process was obtai
ned through the compariso
n a
nd a
nalysis of the process, formi
ng a machi
ni
ng process card a
nd machi
ni
ng process card. A
nd fi
nish milli
ng a
nd tur
ni
ng a
nd drilli
ng fixture desig
n, elaborated the localizatio
n scheme selectio
n, clampi
ng scheme, clamp desig
n, AutoCAD is used to complete the assembly drawi
ng of this typical fixture a
nd clamp parts map specific. Processi
ng tech
nology of the desig
n is reaso
nable, feasible， high efficie
ncy, labor savi
ng fixture, ca
n meet the processi
ng requireme
nts of parts， e
nsure the machi
ni
ng quality. Key Words: valve rocker shaft beari
ng; mecha
nical processi
ng; processi
ng tech
nology; typical jig 目录 1绪论1 1.1题目背景及研究意义1 1.2国内外相关研究情况2 1.3本课题主要内容和拟采用的研究方案3 2零件的分析5 2.1零件的作用5 2.2零件的结构分析5 2.2零件的工艺分析6 2.3零件的生产类型6 3机械加工工艺规程设计8 3.1确定毛坯的制造形式8 3.2定位基准的选择8 3.3制定机械加工工艺路线9 3.4工艺方案的比较与分析9 3.5机械加工余量、工序尺寸及毛坯尺寸的确定10 3.6选择加工设备及刀、夹、量具11 3.7确定切削用量及基本工时11 4钻2×Φ13通孔夹具设计26 4.1钻床夹具的设计特点26 4.2问题的提出27 4.3定位基准的选择27 4.4定位元件的设计27 4.5切削力和夹紧力的计算27 4.6定位误差分析28 4.7夹具设计及简要操作说明28 5结论29 参考文献30 致谢31