机械5

泵缸的机械加工工艺及夹具设计 摘要 此次的研究方向是对泵缸的工艺设计以及专用夹具设计，本文前期主要是关于泵缸工艺的研究，先分析泵缸的结构特点以及它的功用，确定加工余量，设计出泵缸的毛坯图、加工工艺规程卡片以及工序卡片。根据泵缸的性质和零件图上各端面的粗糙度选择相对应的机床加工，确定切削用量并计算出加工工时。后半部分是针对泵缸专用夹具进行分析设计，选取泵缸要加工的表面，确定其定位基准面以及定位元件，设计出夹紧方案，并画出两套夹具的装配图和零件图，对设计出的夹具进行夹紧力和定位误差的计算并校核。 关键词：泵缸；工艺设计；夹具 Process specificatio
n a
nd fixture desig
n of pump cyli
nder Abstract The research directio
n of this paper is o
n the process desig
n of pump cyli
nder a
nd the desig
n of special fixture. This article is mai
nly about the research of pump cyli
nder process. First, it a
nalyzes the structure characteristics of the pump cyli
nder a
nd its fu
nctio
n, determi
nes the processi
ng allowa
nce, desig
ns the bla
nk diagram of the pump cyli
nder, the processi
ng procedure card a
nd the process card. Accordi
ng to the
nature of the pump cyli
nder a
nd the rough
ness of each e
nd of the part drawi
ng, choose the correspo
ndi
ng machi
ne tool processi
ng, determi
ne the cutti
ng amou
nt a
nd calculate the processi
ng time. The seco
nd half of the paper is aimed at the a
nalysis a
nd desig
n of the special fixture for the pump cyli
nder, select the surface of the pump cyli
nder to be machi
ned, determi
ne the positio
ni
ng datum a
nd the positio
ni
ng eleme
nt, desig
n the clampi
ng scheme, a
nd draw the assembly drawi
ng a
nd part drawi
ng of the two sets of fixture, a
nd calculate a
nd check the clampi
ng force a
nd the positio
ni
ng error of the desig
ned fixture. Key words: pump cyli
nder; process desig
n; jig 目录 摘要III Abstract IV 1绪论1 1.1机械加工工艺的重要性1 1.2夹具的发展历史1 1.3泵缸的种类2 1.4课题的研究问题及方法2 2零件图分析3 2.1零件图样分析3 2.2结构工艺分析3 2.3零件加工表面的技术要求分析4 2.4绘制毛坯图4 3泵缸加工工艺规程设计5 3.1拟定工艺路线5 3.2工艺方案分析7 4工艺装备的选择及工时计算8 4.1机床的选择8 4.2刀具、夹具、量具的选择8 4.3确定各表面加工余量9 4.4计算各工序加工工时10 5夹具设计24 5.1夹具的设计思路24 5.2夹具设计的注意事项24 5.3定位元件的选择与设计25 5.4夹紧机构的选择与设计26 5.5夹具体的设计27 6综述28 致谢29 参考文献30