机械5

阀腔体机械加工工艺与钻4-M12工序夹具设计 摘要 在“一带一路”的利好形势下，国内的机械加工以及制造业发展飞速，无论是加工效率还是加工精度均进入快车道。非标零件也越来越多，保证其加工精度和生产效率的利器之一就是夹具的设计和制造，在对其进行夹具设计之前还需对其进行加工工艺规程的设计和确定。因此，本次设计主要对机械加工工艺规程以及钻4-M12工序专用夹具进行分析和设计。本次设计以阀腔体作为研究对象，该零件是液压系统上重要的零件之一，保证其正常的工作，实现液压系统运动和动力的输出等。 在对机械加工工艺规程设计之前，完成前期的调研掌握设计的基础知识，把握设计的重点、难点以及设计方向等。完成零件用途的分析、对零件材料进行特性分析，依据任务书和零件结构，选择较为合适的制造方式以及生产类型。完成工艺路线和装备的选取，计算主要的加工参数，填写工艺卡和工序卡等。专用夹具设计钻床夹具，加工4-M12螺纹孔。主要设计定位方案、夹紧方案；选取了定位元件和夹紧元件；设计了夹具体；选择了导向装置并完成相应的计算和分析等 关键词：阀腔体；加工工艺；钻4-M12；专用夹具 Abstract U
nder the favorable situatio
n of the"Belt a
nd Road",the domestic machi
neryprocessi
ng a
nd ma
nufacturi
ng i
ndustryare developi
ng rapidly,a
nd both the processi
ng efficie
ncya
nd processi
ng accuracyhave e
ntered the fast la
ne.There are also more a
nd more
no
n-sta
ndard parts.O
ne of the tools that guara
ntees its machi
ni
ng accuracya
nd productio
n efficie
ncyis the desig
n a
nd ma
nufacture of fixtures.Before desig
ni
ng fixtures,it is
necessaryto desig
n a
nd determi
ne the process specificatio
ns.Therefore,this desig
n mai
nlya
nalyzes a
nd desig
ns the machi
ni
ng process specificatio
ns a
nd special fixtures for the 4-M12 process.This desig
n takes thevalve cavityas the research object.This part is o
ne of the importa
nt parts o
n the hydraulic system to e
nsure its
normalwork a
nd realize the moveme
nt a
nd power output of the hydraulic system. Before desig
ni
ng the machi
ni
ng process specificatio
ns,complete the prelimi
naryi
nvestigatio
n to master the basic k
nowledge of the desig
n,grasp the keypoi
nts,difficulties,a
nd desig
n directio
ns of the desig
nplete the a
nalysis of the purpose of the part,a
nalyze the characteristics of the part material,a
nd choose a more appropriate ma
nufacturi
ng method a
nd productio
n type accordi
ng to the task book a
nd part structureplete the process route a
nd equipme
nt selectio
n,calculate the mai
n processi
ng parameters,fill i
n the process card a
nd process card,etc.Special fixture desig
n drill fixture,machi
ni
ng 4-M12 threaded holes.Mai
nlydesig
n positio
ni
ng scheme a
nd clampi
ng scheme; select positio
ni
ng eleme
nt a
nd clampi
ng eleme
nt; desig
n clamp specific; choose guide device a
nd complete correspo
ndi
ng calculatio
n a
nd a
nalysis,etc. Keywords:valve cavity; processi
ng tech
nology; drill 4-M12; special fixture 目录 第一章绪论1 1.1机床夹具的分类及概述1 1.2机床夹具的发展及趋势2 第二章零件的分析3 2.1零件的作用分析3 2.2零件的表面组成分析3 2.3零件的加工要求分析3 2.4零件的材料分析4 第三章零件的工艺规程设计5 3.1确定零件的生产类型5 3.2确定零件的加工基准5 3.3确定零件的制造形式6 3.4零件加工工艺路线的制定6 3.4.1选择加工工艺路线6 3.4.2比较加工工艺路线7 3.4.3确定加工工艺路线8 3.5确定零件的加工机床、夹具、刀具及量具8 3.6确定零件的加工余量9 3.7确定零件的切削用量及基本工时9 第四章钻4-M12螺纹孔专用夹具设计22 4.1确定零件的定位方案及定位元件22 4.1.1确定零件的定位方案22 4.1.2确定零件的定位元件22 4.2确定零件的夹紧方案及夹紧元件23 4.2.1确定零件的夹紧方案23 4.2.2确定零件的夹紧元件23 4.3确定夹具体23 4.4导向装置的选择24 4.5计算钻削力和夹紧力24 4.5.1计算钻削力24 4.5.2计算夹紧力25 4.6分析定位误差25 结论26 致谢27 参考文献28