机械5

一级减速器箱盖加工工艺和夹具设计 摘要 本文是在减速器箱体的图样分析后进行减速器箱体的机械加工工艺路线的设计，同时按照其中的加工工序的要求设计夹具。 减速器箱体的主要加工内容是表面和孔。其加工路线长，加工时间多，加工成本高，零件的加工精度要求也高。按照机械加工工艺要求，遵循先面后孔的原则，并将孔与平面的加工明确划分成粗加工和精加工阶段以保证加工精度。基准选择以底面作为粗基准，以底面与两个工艺孔作为精基准，确定了其加工的工艺路线和加工中所需要的各种工艺参数。 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:减速器箱体；加工工艺；工序；专用夹具 Abstract This paper is the desig
n of mecha
nical li
ne processi
ng of the gearbox i
n the patter
n a
nalysis of the gearbox after, at the same time accordi
ng to the desig
n process of the fixture requireme
nts. The mai
n co
nte
nt is the processi
ng of the gearbox surface a
nd the hole. The processi
ng route is lo
ng, processi
ng time, high processi
ng cost, the machi
ni
ng precisio
n requireme
nt is high. I
n accorda
nce with the requireme
nts of the machi
ni
ng process, follow the pri
nciple of the surface after the first hole, a
nd the hole a
nd the pla
ne processi
ngclearly divided i
nto roughi
ng a
nd fi
nishi
ng stages of processi
ng to e
nsure accuracy. The basis choice to the bottom as a rough be
nchmark, the bottom with two hole as abe
nchmark, various parameters
needed to process its processi
ng a
nd processi
ng of. I
n parts of fixture desig
n, mai
nly accordi
ng to the requireme
nts of machi
ni
ng process, a
nalysis of the
number of degrees of freedom should be restricted, a
nd the
n accordi
ng to the surface features of parts of the selected positio
ni
ng eleme
nt, the
n a
nalysis the selected compo
ne
nts ca
n be defi
ned positio
ni
ng should be limited degrees of freedom. Determi
ne the locatio
n compo
ne
nts also
need to select the clampi
ng eleme
nt, fi
nally is to determi
ne the structure of special fixture. Keywords: reducer; processi
ng tech
nology; process; special fixture 目录 摘要I Abstract II 1绪论1 1.1本课题的研究内容和意义1 1.2国内外的发展概况2 1.3本课题应达到的要求3 2零件工艺的分析4 2.1零件的工艺分析4 2.2箱体零件的结构工艺性4 3工艺规程设计7 3.1确定毛坯的制造形式7 3.2定位基准的选择8 3.2.1粗基准的选择8 3.2.2精基准的选择9 3.3拟定工艺路线10 3.3.1划分加工阶段10 3.3.2安排加工顺序11 3.3.3拟定加工工艺路线12 3.4机械加工余量、工序尺寸及毛坯尺寸的确定13 4确定切削用量及基本工时15 4.1粗铣上窥视孔面15 4.2粗铣结合面16 4.3磨分割面17 4.4钻孔18 5钻孔夹具设计20 5.1设计分析20 5.2设计方案论证20 5.3切削力及夹紧力的计算20 5.4设计及操作的简要说明21 5.5结构分析21 5.6夹具的公差23 5.7工序精度分析24 总结25 参考文献27 致谢28