摘要 差速器壳体的加工工艺和钻端面12-ф12.5孔的工艺设计、工序设计以及专用夹具的设计三部分。在工艺设计中要首先对零件进行分析，了解零件的工艺再设计出毛坯的结构，并选择好零件的加工基准，设计出零件的工艺路线；接着对零件各个工步的工序进行尺寸计算，关键是决定出各个工序的工艺装备及切削用量；然后进行专用夹具的设计，选择设计出夹具的各个组成部件，如定位元件、夹紧元件、引导元件、夹具体与机床的连接部件以及其它部件；计算出夹具定位时产生的定位误差，分析夹具结构的合理性与不足之处，并在以后设计中注意改进。 关键词：差速器壳体；加工工艺；工序；专用夹具；切削用量 Abstract The processi
ng tech
nology of differe
ntial shell a
nd the process desig
n of drilli
ng hole 12-12.5 o
n the e
nd face, the process desig
n a
nd the desig
n of special fixture are three parts. I
n the process desig
n, we should first a
nalyze the parts, u
ndersta
nd the process of the parts, the
n desig
n the structure of the bla
nk, a
nd select the processi
ng be
nchmark of the parts, the
n desig
n the process route of the parts; the
n calculate the size of the parts i
n each step, the key is to determi
ne the process equipme
nt a
nd cutti
ng parameters of each step; a
nd the
n, we ca
n choose the processi
ng be
nchmark of the parts. The desig
n of the special fixture is carried out, a
nd the compo
ne
nts of the fixture are selected, such as positio
ni
ng eleme
nts, clampi
ng eleme
nts, guidi
ng eleme
nts, co
n
necti
ng parts betwee
n fixture body a
nd machi
ne tool, a
nd other compo
ne
nts. The positio
ni
ng errors caused by fixture positio
ni
ng are calculated, the ratio
nality a
nd shortcomi
ngs of fixture structure are a
nalyzed, a
nd the desig
n
notes are give
n i
n the future. I
nte
ntio
n to improve. Key words: differe
ntial case; processi
ng tech
nology; process; special fixture; cutti
ng parameters 目录 摘要I Abstract II 序言1 1.零件的分析2 1.1零件的作用2 1.2零件的工艺分析2 2.1毛坯的制造形式4 2.2基准面的选择4 2.2.1粗基准的选择4 2.2.2精基准的选择4 2.3制订工艺路线4 2.3.1.工艺线路方案一4 2.3.2工艺路线方案二5 2.3.3.工艺方案的比较与分析5 2.4机械加工余量、工序尺寸及毛坯尺寸的确定6 2.4.1外圆表面6 2.4.2内圆表面8 2.4.3端面9 2.4.4凸台孔系9 2.5确定切削用量及基本工时10 3.夹具设计36 3.1问题的提出36 3.2夹具设计36 3.2.1定位基准的选择36 3.2.2导向方案36 3.2.3切削力和夹紧力的计算36 3.2.4.工件的加工精度分析37 参考文献38