机械5

阀体零件的机械加工工艺规程及工艺装备设计 摘要 在机械制造各行业的工艺过程中广泛应用着各种不同的，用以固定加工对象，使之占有正确位置，以便接受施工的一种工艺装备，统称为夹具。因此，无论是在机械加工，装配，检验，还是在焊接，热处理等冷，热工艺中，以及运输工作中都大量采用夹具。但在机械加工中应用最为广泛的是金属切削机床上使用的夹具，我们称其为机床夹具。它在保证产品优质，高产，低成本，充分发挥现有设备的潜力，以便工人掌握复杂或精密零件加工技术，以减轻繁重的体力劳动等诸方面起着巨大的作用。因此，机床夹具的设计和使用是促进生产迅速发展的重要工艺措施之一。为此，在本次设计时，选择了机床夹具设计。本文主要围绕机床车端面夹具设计为中心，用以车阀体零件小凸台平面。首先通过学习所获得的知识，让我们对夹具设计有了初步的了解，特别是夹具设计的了解更为深刻。然后，在导师的指导下，对夹具设计方案进行分析和选择。选定方案后，通过查阅相关夹具设计书籍和相关图例完成夹具的总体设计。 关键词：关键词;机械；夹具；车端面；加工 Mecha
nical processi
ng procedures a
nd equipme
nt desig
n of the body parts Abstract i
n the mecha
nical ma
nufacturi
ng i
ndustry i
n the process of awide ra
nge of differe
nt, to fix the processi
ng object, make it occupy the correct positio
n, i
n order to accept the co
nstructio
n of a process equipme
nt, collectively referred to as fixture. Therefore, fixture iswidely used i
n machi
ni
ng, assembly, i
nspectio
n,weldi
ng, heat treatme
nt a
nd other cold a
nd hot processes, aswell as tra
nsportatio
nwork. But the mostwidely used i
n machi
ni
ng is the fixture used o
n metal cutti
ng machi
ne tools,we call it machi
ne tool fixture. It plays a
n importa
nt role i
n e
nsuri
ng the high quality, highyield a
nd low cost of products, givi
ng full play to the pote
ntial of existi
ng equipme
nt, so thatworkers ca
n master the processi
ng tech
nology of complex or precise parts, a
nd reduce the heavy physical labor. Therefore, the desig
n a
nd use of machi
ne tool fixture is o
ne of the importa
nt tech
nological measures to promote the rapid developme
nt of productio
n. Therefore, i
n this graduatio
n project, the machi
ne tool fixture desig
n is selected. This paper focuses o
n the desig
n of the e
nd fixture of machi
ne tool lathe,which is used to tur
n the small boss pla
ne ofvalve body parts. First of all, through lear
ni
ng the k
nowledge gai
ned, let us have a prelimi
nary u
ndersta
ndi
ng of fixture desig
n, especially the u
ndersta
ndi
ng of fixture desig
n is more profou
nd. The
n, u
nder the guida
nce of the tutor, the fixture desig
n scheme is a
nalyzed a
nd selected. After the scheme is selected, the overall desig
n of the fixture is completed by referri
ng to releva
nt fixture desig
n books a
nd related illustratio
ns. Keywords: keywords; machi
nery; fixture; tur
ni
ng e
nd face; machi
ni
ng 目录 摘要1 Abstract 1 第1章绪论1 1.1机械加工工艺与夹具设计的发展概况1 1.2机械加工工艺与夹具设计相关技术的国内外现状1 1.3选题意义和关键问题3 1.3.1选题的背景3 1.3.2选题意义3 1.3.3关键问题4 第2章阀体零件机械加工工艺规程设计5 2.1零件的分析5 2.1.1零件的作用5 2.1.2零件的工艺分析6 2.2工艺过程设计所应采取的相应措施7 2.3阀体零件毛坯制造方式的选择8 2.4阀体零件加工定位基准的选择8 2.4.1粗基准选择应当满足以下要求： 8 2.4.2精基准的选择8 2.5机械加工余量、工序尺寸及毛坯尺寸的确定8 2.5.1确定机械加工余量、毛坯尺寸和公差9 2.5.2设计毛坯图9 2．6零件表面加工方法的选择和工艺路线的制定10 2.6．1零件表面加工方法的选择11 2.6．2制定工艺路线11 2.6.3工艺方案的比较与分析12 2.7确定切削用量及基本工时13 第3章夹具设计25 结论27 致谢28 参考文献29