机械5

液压万向台虎钳中底座压块铣宽40两端面的夹具设计及的加工工艺规程装备 摘要 本次设计内容涉及了机械制造工艺及机床夹具设计、金属切削机床、公差配合与测量等多方面的知识。 液压万向台虎钳中底座压块的加工工艺规程及铣宽40两端面的夹具设计是包括零件加工的工艺设计、工序设计以及专用夹具的设计三部分。在工艺设计中要首先对零件进行分析，了解零件的工艺再设计出毛坯的结构，并选择好零件的加工基准，设计出零件的工艺路线；接着对零件各个工步的工序进行尺寸计算，关键是决定出各个工序的工艺装备及切削用量；然后进行专用夹具的设计，选择设计出夹具的各个组成部件，如定位元件、夹紧元件、引导元件、夹具体与机床的连接部件以及其它部件；计算出夹具定位时产生的定位误差，分析夹具结构的合理性与不足之处，并在以后设计中注意改进。 关键词：底座压块;夹具设计;工艺;工序;专用夹具;切削用量 Abstract This desig
n i
nvolves mecha
nical ma
nufacturi
ng tech
nology a
nd machi
ne tool fixture desig
n, metal cutti
ng machi
ne tools, tolera
nce fit a
nd measureme
nt a
nd other aspects of k
nowledge. The machi
ni
ng procedure of the base block i
n the hydraulic u
niversal be
nch clamp a
nd the desig
n of the clampi
ng device for milli
ng thewidth of 40 e
nds are composed of three parts: the process desig
n, the process desig
n a
nd the desig
n of the special clampi
ng device. I
n the process desig
n,we must first a
nalyze the parts, u
ndersta
nd the process of the parts, the
n desig
n the structure of the bla
nk, a
nd select the processi
ng be
nchmark of the parts, the
n desig
n the process route of the parts. The desig
n of special fixture is carried out, a
nd each compo
ne
nt of fixture is selected, such as positio
ni
ng compo
ne
nt, clampi
ng compo
ne
nt, guidi
ng compo
ne
nt, co
n
necti
ng compo
ne
nt betwee
n fixture a
nd machi
ne tool, a
nd other compo
ne
nts; the positio
ni
ng error caused by fixture positio
ni
ng is calculated, the ratio
nality a
nd shortcomi
ngs of fixture structure are a
nalyzed, a
nd the
notes i
n future desig
n are give
n. It is i
nte
nded to be improved. Keywords: base press block; fixture desig
n; tech
nology; process; special fixture; cutti
ng parameter 目录 摘要I Abstract II 1概述发展1 1.1机床夹具简介1 1.1.1 1 1.1.2机床夹具的组成1 1.1.3夹具设计的步骤和基本要求1 2计算生产纲领、确定生产类型7 2.1生产纲领7 2.2生产类型7 3零件分析9 3.1零件的结构分析9 3.1.1零件图分析9 3.1.2结构工艺性分析9 3.2零件的技术要求分析9 3.2.1主要加工表面之间的相互位置精度9 底座压块主要加工表面为： 9 3.2.3加工表面的粗糙度9 4工艺规程设计11 4.1定位基准的选择11 4.2制定加工工艺路线12 4.2.1各表面加工方法选择12 4.2.2加工工艺路线方案12 4.2.3确定加工工艺路线12 4.3选择加工设备及工艺装备13 4.4加工工序设计、工序尺寸计算13 4.5选择切削用量、确定时间定额14 5机床专用夹具设计22 5.1专用夹具的提出22 5.2定位基准的选择22 5.3定位误差分析22 5.4切削力的计算与夹紧力分析23 总结25 参考文献26