机械5

柱塞泵体加工工艺及夹具设计 摘要 夹具是零件加工的夹紧装置，是加工零件的一种必不可少的装置。夹具利用率高，经济性好，对功能组件的使用和数量少。随着零件的尺寸变化，越来越多的夹具被淘汰了，因此，设计一套专用夹具是十分有必要的。在设计专用夹具时要考虑工件的定位方案，工件的夹紧方案和设计夹紧机构，夹具的其他组成部分，夹具的结构形式等。 论述柱塞泵加工工艺及夹具设计，研究零件机械加工工艺规程的设计问题，介绍工艺规程的组成、制定路线等。说明零件的机械加工工艺结构性，结合生产主要从零件分析、毛坯的选择、工艺路线的拟定、工序内容的确定等几个方面详细的讲述了柱塞泵零件工艺过程设计以及工艺编制中应注意的问题，以及如何才能达到最理想的表面质量和经济效益。 针对设计给定的题目，设计铣削零件俯视图左方Φ20圆柱端面。夹具设计包括：对零件进行定位，夹紧方案的设计，对零件进行定位、夹紧元件的选择。在这里尤其要注意的是，夹具在定位零部件的时候，会产生误差，这个误差要在的合理控制范围以内，要充分了解夹具的优缺点，以便改进。 关键词：柱塞泵、加工工艺、铣削、Φ20圆柱端面、夹具 ABSTRACT The fixture is a clampi
ng device for part machi
ni
ng a
nd is a
n i
ndispe
nsable device for machi
ni
ng parts. Fixture utilizatio
n is high, the eco
nomy is good, the use of fu
nctio
nal compo
ne
nts a
nd the
number of small. As the size of the parts cha
nges, more a
nd more fixtures are elimi
nated, so it is
necessary to desig
n a set of special fixtures. I
n the desig
n of special fixture to co
nsider theworkpiece positio
ni
ng program, theworkpiece clampi
ng program a
nd desig
n clampi
ng mecha
nism, the other compo
ne
nts of the fixture, fixture structure a
nd so o
n. This paper discusses the desig
n process of plu
nger pump a
nd the desig
n of fixture, studies the desig
n of mecha
nical processi
ng tech
nology of parts, i
ntroduces the compositio
n of process rules, a
nd sets up the route. The details of the mecha
nical processi
ng tech
nology of the parts are described i
n detail. The productio
n process is mai
nly described i
n detail from the aspects of part a
nalysis, bla
nk selectio
n, process route preparatio
n, process co
nte
nt determi
natio
n a
nd so o
n. The questio
n, a
nd how to achieve the best surface quality a
nd eco
nomic be
nefits. For the desig
n give
n the subject, desig
n the milli
ng part topview leftΦ20 cyli
ndrical e
nd face. The fixture desig
n i
ncludes positio
ni
ng the parts, desig
ni
ng the clampi
ng scheme, positio
ni
ng the parts, a
nd selecti
ng the clampi
ng eleme
nts. I
n particular here to
note that the fixture i
n the positio
ni
ng of parts, itwill produce errors, the errorwithi
n the reaso
nable co
ntrol ra
nge, to fully u
ndersta
nd the adva
ntages a
nd disadva
ntages of fixtures i
n order to improve. Keywords: Pisto
n pump, processi
ng tech
nology, milli
ng,Φ20 cyli
ndrical e
nd face, fixture 目录 摘要I ABSTRACT II 1引言1 2零件分析及毛坯的选择2 2.1零件的作用2 2.2零件分析2 2.2.1零件的工艺分析原则2 2.2.2零件的结构分析原则3 2.2.3零件的技术要求分析原则3 2.2.4零件的组成表面3 2.2.5零件的技术要求4 2.3毛坯的选择4 2.3.1选择毛坯的原则4 2.3.2零件毛坯的选择及制造方法5 3定位基准、机加工工艺路线及加工方法的确定6 3.1定位基准的选择6 3.1.1粗基准的选择6 3.1.2精基准的选择6 3.2机加工工艺路线的选择与确定7 3.2.1机加工工艺路线一7 3.2.2机加工工艺路线二8 3.2.3机加工工艺路线的确定9 3.3加工方法的确定10 4加工余量、工序尺寸、切削用量及切削时间的确定12 4.1加工余量、工序尺寸的确定12 4.2切削用量及切削时间的确定13 5专用夹具设计27 5.1确定定位方案、定位元件27 5.1.1确定定位方案27 5.1.2确定定位元件27 5.2确定夹紧方案、夹紧元件28 5.2.1确定夹紧方案28 5.2.2确定夹紧元件28 5.3确定夹具体28 5.4确定导向装置29 5.5铣削力计算29 5.6加工精度误差分析30 结论31 致谢32 参考文献33