机械5

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。 针对连接杆(MJ-LJG)零件做出了工艺设计、工序设计以及专用夹具三部分。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：连接杆；工艺；工序；专用夹具；工艺路线；切削用量 Abstract This desig
n i
nvolves mecha
nical ma
nufacturi
ng tech
nology a
nd machi
ne tool fixture desig
n, metal cutti
ng machi
ne tools, tolera
nce fit a
nd measureme
nt a
nd other aspects of k
nowledge. Three parts, i
ncludi
ng process desig
n, process desig
n a
nd special fixture, are made for co
n
necti
ng rod(MJ-LJG) parts. I
n the process desig
n,we must 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 desig
n of special fixture is carried out, a
nd each compo
ne
nt of fixture is selected, such as positio
ni
ng compo
ne
nt, clampi
ng compo
ne
nt, guidi
ng compo
ne
nt, co
n
necti
ng compo
ne
nt betwee
n fixture a
nd machi
ne tool, a
nd other compo
ne
nts; the positio
ni
ng error caused by fixture positio
ni
ng is calculated, the ratio
nality a
nd shortcomi
ngs of fixture structure are a
nalyzed, a
nd the
notes i
n future desig
n are give
n. It is i
nte
nded to be improved. Keywords: co
n
necti
ng rod; tech
nology; process; special fixture; process route; cutti
ng parameter 目录 摘要1 Abstract 2 第1章零件分析和毛坯设计4 1.1零件工艺分析及生产类型确定4 1.2毛坯类型及毛坯图设计4 第2章机械加工工艺规程设计6 2.1基准选择6 2.2工艺方案拟定6 2.3机械加工余量、工序尺寸及公差的确定7 第3章专用夹具设计21 3.1工序内容及加工要求21 3.2定位基准21 3.3夹具结构设计及工作流程21 3.4设计定位方案应满足的要求21 3.5定位方案的确定21 3.6定位元件的确定21 3.7夹紧方案的确定21 3.8夹紧元件的确定21 3.9夹具体的设计22 3.10导向装置23 3.11计算切削力23 3.12计算夹紧力23 3.13定位误差24 第4章结论25 参考文献26