摘要
随着社会的发展,汽车在生产和生活中的越来越广泛,差速器是汽车中的重要部件,其壳体的结构及加工精度直接影响差速器的正常工作,因此研究差速器的加工方法和工艺的编制是十分必要和有意义的。本次设计主要内容有:差速器的工作原理结构分析,差速器壳体的工艺编制,夹具的设计及加工中对定位基准的选择,工序和工装设计中切削用量,夹紧力的计算等。机床夹具的种类很多,其中,使用范围最广的通用夹具,规格尺寸多已标准化,并且有专业的工厂进行生产。而广泛用于批量生产,专为某工件加工工序服务的专用夹具,则需要各制造厂根据工件加工工艺自行设计制造。本设计的主要内容是设计钻孔夹具。
关键词:差速器,壳体,工艺规程,夹具设计
Abstract
With the developme
nt of society, automobiles are more a
nd more widely used i
n productio
n a
nd life. Differe
ntial is a
n importa
nt part of automobiles. The structure a
nd processi
ng accuracy of its shell directly affect the
normal operatio
n of differe
ntial. Therefore, it is very
necessary a
nd mea
ni
ngful to study the processi
ng method a
nd tech
nology of differe
ntial. The mai
n co
nte
nts of this desig
n i
nclude: the a
nalysis of the worki
ng pri
nciple a
nd structure of the differe
ntial, the process preparatio
n of the differe
ntial shell, the selectio
n of positio
ni
ng refere
nce i
n fixture desig
n a
nd processi
ng, the cutti
ng parameters i
n process a
nd tooli
ng desig
n, the calculatio
n of clampi
ng force, etc. There are ma
ny ki
nds of machi
ne tool fixtures, amo
ng which the most widely used ge
neral fixtures, specificatio
ns a
nd sizes have bee
n sta
ndardized, a
nd there are professio
nal factories for productio
n. The special fixture which is widely used i
n batch productio
n a
nd serves a certai
n workpiece processi
ng process
needs to be desig
ned a
nd ma
nufactured by each ma
nufacturer accordi
ng to the workpiece processi
ng tech
nology. The mai
n co
nte
nt of this desig
n is to desig
n drilli
ng fixture. Key words: differe
ntial, shell, process specificatio
n, fixture desig
n 目录 摘要1 Abstract II 第1章绪论1 1.1课题的背景及意义1 1.2差速器的主要分类1 1.2.1开式差速器1 1.2.2限滑差速器2 1.3差速器结构2 1.3主要内容3 第2章零件的分析4 2.1零件的作用4 2.2零件的工艺分析4 第3章工艺规程设计7 3.1基准面的选择7 3.1.1粗基准的选择7 3.1.2精基准的选择7 3.2毛坯的制造形式7 3.3制订工艺路线7 3.3.1.工艺线路方案一8 3.3.2工艺路线方案二8 3.3.3.工艺方案的比较与分析9 3.4机械加工余量、工序尺寸及毛坯尺寸的确定9 3.4.1外圆表面9 3.5内圆表面11 3.4.3端面13 3.4.4凸台13 3.4.5孔类13 第4章确定差速器切削用量及基本工时15 4.1工序1铣φ200外圆右端面(大头)。 15 4.2工序2铣φ50外圆左端面(小头) 16 4.3工序3粗、半精车φ200、φ154、φ150、φ50外圆17 4.4工序4钻孔φ40底孔φ39.5,精车φ200、φ154、φ150、φ50外圆,精车最大轮廓φ200前端面23 4.5工序5粗镗φ50、φ122、φ130孔28 4.6工序6精镗φ40、φ50、φ122、φ130孔,以端面和φ154外圆定位,选用T740K精镗床33 4.7工序7铣两凸台上平面37 4.8工序8钻φ4孔,选用Z525立式钻床及专用夹具。 38 4.9工序9钻、铰两组φ8、φ22孔,φ8孔倒角。 39 4.10工序10钻孔12×Φ12.5 42 第5章钻孔夹具设计44 5.1问题的提出44 5.2定位基准的选择44 5.3定位元件与夹紧元件的选择44 5.4切削力与夹紧力的计算45 5.5钻套、衬套、钻模板及夹具体设计45 5.6夹具精度分析48 5.7本章小结49 总结51 参考文献52 致谢53
展开...
nt of society, automobiles are more a
nd more widely used i
n productio
n a
nd life. Differe
ntial is a
n importa
nt part of automobiles. The structure a
nd processi
ng accuracy of its shell directly affect the
normal operatio
n of differe
ntial. Therefore, it is very
necessary a
nd mea
ni
ngful to study the processi
ng method a
nd tech
nology of differe
ntial. The mai
n co
nte
nts of this desig
n i
nclude: the a
nalysis of the worki
ng pri
nciple a
nd structure of the differe
ntial, the process preparatio
n of the differe
ntial shell, the selectio
n of positio
ni
ng refere
nce i
n fixture desig
n a
nd processi
ng, the cutti
ng parameters i
n process a
nd tooli
ng desig
n, the calculatio
n of clampi
ng force, etc. There are ma
ny ki
nds of machi
ne tool fixtures, amo
ng which the most widely used ge
neral fixtures, specificatio
ns a
nd sizes have bee
n sta
ndardized, a
nd there are professio
nal factories for productio
n. The special fixture which is widely used i
n batch productio
n a
nd serves a certai
n workpiece processi
ng process
needs to be desig
ned a
nd ma
nufactured by each ma
nufacturer accordi
ng to the workpiece processi
ng tech
nology. The mai
n co
nte
nt of this desig
n is to desig
n drilli
ng fixture. Key words: differe
ntial, shell, process specificatio
n, fixture desig
n 目录 摘要1 Abstract II 第1章绪论1 1.1课题的背景及意义1 1.2差速器的主要分类1 1.2.1开式差速器1 1.2.2限滑差速器2 1.3差速器结构2 1.3主要内容3 第2章零件的分析4 2.1零件的作用4 2.2零件的工艺分析4 第3章工艺规程设计7 3.1基准面的选择7 3.1.1粗基准的选择7 3.1.2精基准的选择7 3.2毛坯的制造形式7 3.3制订工艺路线7 3.3.1.工艺线路方案一8 3.3.2工艺路线方案二8 3.3.3.工艺方案的比较与分析9 3.4机械加工余量、工序尺寸及毛坯尺寸的确定9 3.4.1外圆表面9 3.5内圆表面11 3.4.3端面13 3.4.4凸台13 3.4.5孔类13 第4章确定差速器切削用量及基本工时15 4.1工序1铣φ200外圆右端面(大头)。 15 4.2工序2铣φ50外圆左端面(小头) 16 4.3工序3粗、半精车φ200、φ154、φ150、φ50外圆17 4.4工序4钻孔φ40底孔φ39.5,精车φ200、φ154、φ150、φ50外圆,精车最大轮廓φ200前端面23 4.5工序5粗镗φ50、φ122、φ130孔28 4.6工序6精镗φ40、φ50、φ122、φ130孔,以端面和φ154外圆定位,选用T740K精镗床33 4.7工序7铣两凸台上平面37 4.8工序8钻φ4孔,选用Z525立式钻床及专用夹具。 38 4.9工序9钻、铰两组φ8、φ22孔,φ8孔倒角。 39 4.10工序10钻孔12×Φ12.5 42 第5章钻孔夹具设计44 5.1问题的提出44 5.2定位基准的选择44 5.3定位元件与夹紧元件的选择44 5.4切削力与夹紧力的计算45 5.5钻套、衬套、钻模板及夹具体设计45 5.6夹具精度分析48 5.7本章小结49 总结51 参考文献52 致谢53
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