机械5

螺杆泵衬套零件的2－Φ21H7孔的夹具设计及加工工艺规程装备 摘要 在现代化的生产里面，夹具在加工的时候是非常关键的，在设备上进行生产使用的时候，是不能丢弃的一个关键部分。加工这个行业范围是比较广的，生产的零部件不管是构造也好，变化是非常大的，现在基本上都不用通用夹具来进行生产了。这样来看，专用夹具在现代化的生产里面是非常重要的。 这篇写的题目是“螺杆泵衬套”零件2－Φ21H7孔的加工工艺装备设计。本次夹具设计车削2－Φ21H7孔的专用夹具。 一开始进行设计的时候，我翻阅了很多相关的材料，对于夹具怎么进行定位，怎么进行夹紧等等相关的知识都了解了一下，还有对于夹具现在的状况的有关知识进行了全面的了解。本次设计的主要内容有：对零件结构的分析，确定零件的制造形式，绘制零件图和毛坯图；然后对每一个步进行计算，确定切削用量，编写加工工艺过程卡和加工工序卡；确定加工工序的定位方案和夹紧方案，选择定位元件和夹紧元件等，对其定位误差进行分析；绘制夹具装配图及所有非标零件图；撰写设计说明书，对本次设计进行总结。 关键词：螺杆泵衬套、2－Φ21H7、加工工艺、装备、专用夹具 Abstract I
n moder
n productio
n, the fixture isvery critical i
n the processi
ng time, i
n the equipme
nt for productio
n a
nd use, is a key part ca
n
not be discarded. Processi
ng is awide ra
nge of i
ndustries, the productio
n of spare parts regardless of the structure, the cha
nge isvery large,
now basically do
not use ge
neral fixture for productio
n. I
n thisway, special fixture isvery importa
nt i
n moder
n productio
n. The title of this paper is the processi
ng tech
nology a
nd equipme
nt desig
n of 2 screw 21H7 bushi
ng parts. The fixture is desig
ned for tur
ni
ng 2- 21H7 holes. At the begi
n
ni
ng of the paper desig
n, I looked through a lot of related materials, for the fixture how to locate, how to clamp a
nd other related k
nowledge have a look, aswell as the curre
nt situatio
n of the fixture for a comprehe
nsive u
ndersta
ndi
ng of the releva
nt k
nowledge. The mai
n co
nte
nts of this desig
n i
nclude a
nalyzi
ng the structure of the parts, determi
ni
ng the ma
nufacturi
ng form of the parts, drawi
ng part drawi
ngs a
nd bla
nk drawi
ngs; the
n calculati
ng each step to determi
ne the cutti
ng parameters, compili
ng the processi
ng process card a
nd processi
ng process card; determi
ni
ng the positio
ni
ng a
nd clampi
ng program of the processi
ng procedures, selecti
ng the positio
ni
ng compo
ne
nts a
nd bla
nk drawi
ngs. Fixture compo
ne
nts, such as its positio
ni
ng error a
nalysis; draw fixture assembly drawi
ngs a
nd all
no
n-sta
ndard parts drawi
ngs;write desig
n i
nstructio
ns, to summarize the desig
n. Keywords screw pump bushi
ng, 2 21H7, processi
ng tech
nology, equipme
nt, special fixture 目录 摘要I Abstract II 绪论1 第1章螺杆泵衬套零件的分析2 1.1零件的作用2 1.2零件的工艺分析2 1.2.1零件的组成表面2 1.2.2零件加工的技术要求3 1.2.3零件的形位公差要求3 1.3零件生产类型的确定3 1.4毛坯制造形式的确定3 第2章螺杆泵衬套工艺规程设计5 2.1定位基准的选择5 2.2加工工艺路线的确定5 2.3加工方法、加工刀具及量具的选用6 2.4各工序加工余量的确定8 2.5切削用量及切削时间的确定9 第3章专用夹具设计20 3.1定位方案及定位元件的确定与选择20 3.1.1定位方案的确定20 3.1.2定位元件的选择21 3.2夹紧方案及夹紧元件的确定与选择21 3.2.1夹紧方案的确定21 3.2.2夹紧元件的选择21 3.3夹具体的确定22 3.4夹紧力的计算23 3.5切削力的计算23 3.6夹具误差分析24 3.7生产效率分析24 结论25 致谢26 参考文献27