摘要 拨叉的加工工艺和夹具设计包括零件加工工艺设计、工序设计和专用夹具的设计三部分。在设计的过程中应该首先理解的分析部分,部分工序的设计一个毛坯的结构,并选择好零件的加工基准,设计出零件的工艺路线;然后每个工序切削力的部分步骤大小计算,是决定工艺的关键设备和过程的各种设计参数,然后一个专用夹具,夹具选择各种组件的设计,如定位和夹紧元素连接部分,指导元素,夹具和机床和其他组件,定位误差计算夹具,分析夹具结构的合理性和不足之处,并注重未来的改善设计。最后,做一些地方的编译过程和编程过程。 关键词：拨叉工艺规程；定位；压紧；导向，夹具，误差 Abstract Machi
ni
ng process a
nd fixture desig
n of the fork, i
ncludi
ng parts processi
ng process desig
n, process desig
n a
nd the desig
n of special fixture three parts. I
n the process of desig
n should first u
ndersta
nd the a
nalysis of parts, parts of the process to desig
n a bla
nk structure, a
nd choose the good compo
ne
nts the processi
ng datum, desig
ns the process routes of the parts; the
n the parts of each labor step process size calculatio
n, is the key to decide the craft equipme
nt a
nd the cutti
ng process of the various desig
n parameters; the
n a special fixture, the fixture selectio
n for the various compo
ne
nts of the desig
n, such as co
n
necti
ng parts positio
ni
ng eleme
nts a
nd clampi
ng eleme
nts, guide eleme
nt, fixture a
nd machi
ne tool a
nd other compo
ne
nts; positio
ni
ng error is calculated whe
n the fixture, a
nalysis the ratio
nality a
nd shortcomi
ng of fixture structure, a
nd pays atte
ntio
n to the improveme
nt i
n future desig
n. Fi
nally, do some parts of the compilatio
n process a
nd programmi
ng procedure. Key words: e
nd cover procedure; Positio
ni
ng; Pressure; Guide, fixture, error 目录 摘要I Abstract 1 第一章零件的分析3 1.1零件的作用3 1.2零件的工艺分析3 第二章毛坯的确定5 2.1确定毛坯的制造形式5 2.2毛坯形状及尺寸6 第三章拟定加工工艺路线7 3.1基准的选择7 3.1.1粗基准选择7 3.1.2精基准的选择7 3.2制定工艺路线8 第四章零件加工工序设计9 4.1粗铣25mm高度尺寸9 4.2精铣25mm高度尺寸9 4.3钻2×Φ20mm孔10 4.4粗车Φ52mm孔11 4.5钻Φ8mm孔，留量0.2mm 11 第五章夹具设计13 5.1问题的提出13 5.2定位基准的选择13 5.3定位的基本原理13 5.4定位元件的设计14 5.5夹紧装置的设计14 5.6切削力及夹紧力计算14 5.7定位误差分析15 5.8夹具设计及操作简要说明15 总结16 致谢18 参考文献19