机械5

双联齿轮的钻3-Φ8夹具设计及加工工艺规程装备 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。 双联齿轮加工工艺规程及钻孔的夹具设计是包括零件加工的工艺设计、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：双联齿轮；加工工艺；夹具设计；工序；工艺；工艺路线 ABSTRCT 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. The machi
ni
ng procedure of double gear a
nd the fixture desig
n of drilli
ng hole are composed of three parts: the process desig
n of part machi
ni
ng, the process desig
n a
nd the desig
n of special fixture. 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: duplex gear; processi
ng tech
nology; fixture desig
n; process; tech
nology; process route 目录 摘要I ABSTRCT II 一.绪论1 1.1设计的背景及意义1 1.1.1设计的背景1 1.1.2设计的意义2 1.2设计的内容和思路2 1.2.1设计的主要内容2 1.2.2拟定解决的关键问题3 1.2.3解决问题的方法及措施3 二零件的分析5 2.1零件的作用5 2.2零件的工艺分析` 6 三.工艺规程设计7 3.1确定毛坯的制造形式7 3.2基面的选择8 3.3制定工艺路线9 3.4机械加工余量、工序尺寸及毛坯尺寸的确定12 3.5确定切削用量及基本工时12 3.5.1粗车φ256外圆12 3.5.2粗车φ186外圆及槽13 3.5.3精车φ246外圆14 3.5.4钻3-Φ8mm孔15 3.5.5精车φ140内孔16 四夹具设计18 4.1问题的提出18 4.2定位基准的选择18 4.3切削力和夹紧力的计算18 4.4定位误差分析19 4.5夹具设计及操作的简要说明20 总结21 致谢23 参考文献24