机械5

虎钳固定钳身的机械加工工艺规程及钻、铰18孔夹具设计 摘要 本次设计内容涉及了机械制造工艺及机床夹具设计、金属切削机床、公差配合与测量等多方面的知识。 本次设计内容包含了虎钳固定钳身的的工艺设计、工序设计以及钻、铰18孔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：虎钳固定钳身；工艺；工序；专用夹具；工艺装备；切削用量 Abstract This desig
n i
nvolves the k
nowledge of machi
ne ma
nufacturi
ng process a
nd fixture desig
n, metal cutti
ng machi
ne tools, tolera
nce matchi
ng a
nd measureme
nt. This desig
n i
ncludes three parts: process desig
n, process desig
n a
nd special fixture for drilli
ng a
nd reami
ng 18 holes. I
n the process desig
n, it is
necessary to first a
nalyze the parts, u
ndersta
nd the process of the parts, the
n desig
n the structure of the bla
nk, select the processi
ng be
nchmark of the parts, a
nd desig
n the process route of the parts; the
n calculate the size of each process step of the parts, the key is to determi
ne the process equipme
nt a
nd cutti
ng parameters of each process; the
n desig
n the special fixture, a
nd select a
nd desig
n the fixture Each compo
ne
nt of the fixture, such as positio
ni
ng eleme
nt, clampi
ng eleme
nt, guidi
ng eleme
nt, co
n
necti
ng part betwee
n the fixture a
nd the machi
ne tool a
nd other parts; calculate the positio
ni
ng error ge
nerated duri
ng the fixture positio
ni
ng, a
nalyze the ratio
nality a
nd shortcomi
ngs of the fixture structure, a
nd pay atte
ntio
n to improveme
nt i
n the later desig
n. Keywords:vise fixed body; process; process; special fixture; process equipme
nt; cutti
ng amou
nt 目录 摘要I Abstract II 一、零件的分析1 1.1零件的作用1 1.2零件的工艺分析1 二、确定生产类型1 三、确定毛坯2 3.1、确定毛坯种类： 2 3.2、确定铸件加工余量及形状： 2 3.3、绘制铸件零件图2 四、工艺规程设计3 4.1选择定位基准： 3 4.2制定工艺路线: 3 4.3机械加工余量、工序尺寸及公差的确定: 4 4.3.1、圆柱表面工序尺寸： 4 4.3.2、平面工序尺寸： 5 4.3.3、确定切削用量及时间定额： 5 五、夹具设计15 5.1问题的提出15 5.2夹具设计15 5.2.1、定位基准选择15 5.2.2、切削力及夹紧力计算16 5.2.3、定位误差分析16 5.2.4、夹具设计及操作的简要说明17 5.2.5、钻床夹具的装配图见附图17 参考文献18