机械5

阀体零件带分度装置的车床夹具设计 【摘要】 本设计阀体零件加工过程的基础设计的夹具设计。主要加工部位是平面和孔加工。在一般情况下，确保比保证精密加工孔很容易。因此，设计遵循的原则是先加工面后加工孔表面。在零件的夹具设计中，主要是根据零件加工工序要求，分析应限的自由度数，进而根据零件的表面特征选定定位元件，再分析所选定位元件能否限定应限自由度。确定了定位元件后还需要选择夹紧元件，最后就是确定专用夹具的结构形式。 关键词：阀体零件；工艺；夹具； Abstract: Fixture desig
n basis for the desig
n of the desig
n of the cyli
nder parts machi
ni
ng process. The mai
n processi
ng site is flat a
nd hole machi
ni
ng. I
n ge
neral, to e
nsure that it is easy to e
nsure the precisio
n machi
ni
ng tha
n the hole. Therefore, the desig
n pri
nciple to follow is processed after the first hole surface machi
ned surface. I
n parts of the fixture desig
n, parts machi
ni
ng process is mai
nly based o
n the requireme
nts a
nalysis should be limited to the
number of degrees of freedom, a
nd the
n depe
ndi
ng o
n the surface characteristics of the selected parts of the positio
ni
ng eleme
nt, a
nd the
n a
nalyze whether the limit should be selected positio
ni
ng eleme
nt limit freedom. After determi
ni
ng the positio
ni
ng eleme
nts also
need to select the clampi
ng eleme
nt, is to determi
ne the fi
nal form of the structure of special fixture. Keywords: cyli
nder parts; tech
nology; fixture; 目录 1零件的结构分析1 1.1零件的工艺分析1 1.2零件的工艺要求1 2工艺规程设计2 2.1加工工艺过程2 2.2确定各表面加工方案2 2.2.1影响加工方法的因素2 2.2.2加工方案的选择3 2.3确定定位基准3 2.3.1粗基准的选择3 2.3.2精基准选择的原则4 2.4工艺路线的拟订4 2.4.1工序的合理组合5 2.4.2工序的集中与分散5 2.4.3加工阶段的划分6 2.4.4加工工艺路线方案的比较7 2.5零件的偏差，加工余量，工序尺寸及毛坯尺寸的确定8 2.5.1毛坯的结构工艺要求8 2.5.2零件的偏差计算9 2.6确定切削用量及工时定额9 3车2-Φ40孔夹具设计15 3.1车床夹具设计要求说明15 3.2车床夹具的设计要点15 3.3定位机构17 3.4夹紧机构17 3.5零件的车床夹具的加工误差分析18 3.6确定夹具体结构尺寸和总体结构19 3.7零件的车床专用夹具简单使用说明20 结论21 致谢22 参考文献23