机械5

变速叉工艺工装设计 摘要 机床夹具设计是现代机械零件制造和加工过程中，不能缺少的组成部分。机床夹具依据其类型不同分成不同种类，以适应不同复杂程度的零件和不同的加工工序和工步等。所以，对其进行研究有意义。 本次设计的题目是变速叉工艺工装设计，研究的对象是变速叉。研究的变速叉为机器实现不同转速发挥作用，为其正常工作提供保障。设计内容包含工艺设计和夹具设计。在对零件图解读后，确定零件生产类型，编写工艺路线，确定主轴转速、切削量等，填写工序卡。完成零件图、毛坯图绘制。经过分析决定设计钻Ф8锁销孔钻床专用夹具，确定定位、夹紧方案；选择定位、夹紧元件；设计夹具体等。 关键词：变速叉、工艺、工装、钻Ф8锁销孔 ABSTRACT Fixture desig
n of machi
ne tools is a
n i
ndispe
nsable part i
n the process of ma
nufacturi
ng a
nd processi
ng of moder
n mecha
nical parts. Machi
ne tool fixtures ca
n be divided i
nto differe
nt types accordi
ng to their types, so as to adapt to differe
nt complex parts a
nd differe
nt processi
ng procedures a
nd steps. Therefore, it is mea
ni
ngful to study it. The subject of this desig
n is the process tooli
ng desig
n of the tra
nsmissio
n fork, a
nd the object of study is the tra
nsmissio
n fork. The tra
nsmissio
n fork studied i
n this paper ca
n play a role i
n realizi
ng differe
nt rotatio
nal speeds of the machi
ne a
nd guara
ntee its
normalwork. The desig
n i
ncludes process desig
n a
nd fixture desig
n. After i
nterpreti
ng the part drawi
ngs, determi
ne the type of part productio
n, compile the process route, determi
ne the spi
ndle speed, cutti
ng amou
nt, etc., a
nd fill i
n the process card. Complete drawi
ng of parts a
nd bla
nks. After a
nalysis, it is decided to desig
n the special fixture for drilli
ng 8 lock pi
n hole drilli
ng machi
ne, determi
ne the positio
ni
ng a
nd clampi
ng scheme, select the positio
ni
ng a
nd clampi
ng compo
ne
nts, desig
n the fixture body, etc. Keywords: gearshift fork, tech
nology, tooli
ng, drilli
ng_8 lock pi
n hole 目录 摘要I ABSTRACT II 第1章绪论1 1.1机床夹具的概述1 1.2机床夹具的分类1 1.3夹具设计的特点和基本要求2 1.3.1夹具设计的特点2 1.3.2夹具设计的基本要求2 1.4机床夹具在机械加工中的作用3 1.5机床夹具的发展趋势3 第2章零件的工艺性分析5 2.1零件的结构工艺性分析概述5 2.2零件的组成表面、技术要求分析5 2.2.1零件的组成表面分析5 2.2.2零件的技术要求分析5 2.3零件的作用5 2.4零件材料的确定6 2.5确定零件的生产类型6 2.6确定零件的毛坯类型6 第3章拟定零件工艺路线8 3.1选择定位基准8 3.2确定各表面的加工方案8 3.3工艺路线的选择、比较与确定9 3.4确定机床、夹具、刀具及量具10 3.5确定零件加工余量11 3.6计算切削用量及时间定额12 第4章钻孔专用夹具的设计21 4.1选择定位方案和定位元件21 4.1.1选择定位方案21 4.1.2选择定位元件21 4.2选择夹紧方案和夹紧元件21 4.2.1选择夹紧方案22 4.2.2选择夹紧元件23 4.3夹具体的设计23 4.4选择导向装置—钻套24 4.5计算钻削力24 4.6计算夹紧力24 4.7分析定位误差25 结论29 致谢30 参考文献31