机械5

40T刮板输送机减速箱体加工工艺设计及立式钻孔组合机床夹具设计 摘要 本次设计主体是刮板输送机减速器的下箱体，对刮板输送机减速器的箱体零件进行分析，制定箱体的加工工艺过程。主要加工四根轴的轴承孔、铣端面及钻螺纹孔、箱盖和箱座连接的螺栓孔、销孔等。选择丁字镗组合机床的配置形式，绘制组合机床的三图，包括被加工零件工序图、加工示意图、机床尺寸联系图，并对组合机床的夹具进行设计。 零件的工艺编制，在机械加工中占有非常重要的地位，零件工艺编制得合不合理，这直接关系到零件最终能否达到质量要求；夹具的设计也是不可缺少的一部分，它关系到能否提高其加工效率的问题。因此这两者在机械加工行业中是至关重要的环节。本次设计是在学完机械制图、、机械制造技术基储机械制造装备等专业课后，掌握了一定的专业知识。把所学的理论知识综合地运用在实际工艺、夹具设计中。 在设计加工孔8-14的专用夹具时，以箱体底面为基准，通过“C”形钳将箱盖和箱座联结，并以定位销将其定位。为了缩短辅助时间，采用了可换钻套,钻模板左端采用一铰链使其翻转,右端也用铰链和一开口垫圈,用螺母进行联结。这样能很快将箱体放入夹具体上,减轻工人劳动强度，大大提高生产率，提高效益。 关键词：工艺；基准；辅助时间；定位；形位公差。 40’T speed reduce cabi
net processi
ng tech
nology desig
n a
nd Fixture desig
n ofvertical drilli
ng machi
ne tool combi
natio
n ABSTRACT This desig
n mai
n body is the scraper co
nveyer reductio
n gear u
nder box body, carries o
n the a
nalysis to the scraper co
nveyer reductio
n gear box body compo
ne
nts, formulates the box body processi
ng tech
nological process.Mai
nly processes four axes the beari
ng holes, the mill e
nd surface a
nd drills the threaded hole, the box lid a
nd the box place co
n
nectio
n bolt hole, the cotter hole a
nd so o
n.The choice T-shape bori
ng aggregate machi
ne-tool dispositio
n form, the pla
n aggregate machi
ne-tool three charts, i
ncludi
ng are processed the compo
ne
ntsworki
ng procedure chart, the processi
ng schematic drawi
ng, the e
ngi
ne bed size relatio
n chart, a
nd carries o
n the desig
n to the aggregate machi
ne-tool headstock. The processi
ng of parts has avery importa
nt positio
n i
n the process of mecha
nical processi
ng, a
nd the preparatio
n of the parts is
not reaso
nable. This is directly related to the quality requireme
nts of the parts. mecha
nical ma
nufacturi
ng tech
nology fou
ndatio
n, machi
nery ma
nufacturi
ng equipme
nt a
nd other professio
nal courses. Apply the theoretical k
nowledge to the actual process a
nd fixture desig
n. Whe
n desig
ni
ng the special fixture for machi
ni
ng hole 8-14, the box lid a
nd box seat are co
n
nected by the"C" type clamp o
n the bottom of the box body a
nd positio
ned by the positio
ni
ng pi
n. I
n order to shorte
n the auxiliary time, the drill sleeve is used, the left e
nd of the drill template is tur
ned overwith a hi
nge, the right e
nd is also hi
nges a
nd a
n ope
ni
ngwasher, a
nd the
nut is co
n
nected. This ca
n quickly put the box i
nto the clamp, reduci
ng the labor i
nte
nsity ofworkers, greatly improvi
ng productivity a
nd improvi
ng efficie
ncy. Keywords: Craft;be
nchmar;assista
nt time; orie
ntatio
n; shape positio
n tolera
nce 目录 摘要ⅰ Abstractⅱ 第一章概述1 一机床夹具1 (一)机床夹具的概念1 (二)机床夹具的分类1 (三)机床夹具的组成2 二定位基准2 三工件在夹具中的定位2 (一)六点定位原理2 (三)完全定位与不完全定位3 (四)欠定位与过定位3 四组合夹具和随行夹具4 (一)组合夹具4 (二)随行夹具4 一工件的夹紧4 五常用的夹紧装置4 第二章箱体加工工艺规程11 第一节零件介绍11 一产品概述及零件的功用11 二零件的工艺分析及生产类型确定11 第二节机械加工工艺过程设计12 一毛坯分析12 二工艺路线的拟定和定位基面的选择13 三加工余量的确定18 四重点工序分析20 五把加工余量作为封闭环的尺寸链的计算24 第三章夹具设计25 一问题的提出25 二夹具设计25 1定位基准的选择25 2夹紧力计算25 3定位误差分析26 4卡具设计及操作的简要说明27 三夹具零件27 第四章设计体会36 参考文献38 致谢56