机械5

气缸盖的加工工艺及钻Φ5孔钻攻NPT18螺纹孔夹具设计 摘要 夹具课程设计对每一个理工科学生而言都是必不可少的，夹具的设计和研究为今后的学生和工作将提供很大的帮助。 本文设计的任务是设计气缸盖的加工工艺及钻Φ5孔；钻、攻NPT1/8螺纹孔的专用夹具。在充分了解零件的结构后，对其毛坯尺寸、制造类型、基准、加工的工艺路线进行了确定；然后依据设计的加工工艺路线，对每一个工序进行计算。 本次设计出的钻Φ5孔；钻、攻NPT1/8螺纹孔的夹具，在减少停机时间的同时，还提高生产效率。在进行该专用夹具设计的时候，首先应该是建立在对零件的工艺进行分析、选择粗精基准、进行必要计算的基础上。该夹具在设计之初就注重结构工艺性，所以本次设计的夹具结构简易、紧凑，操作起来也比较方便灵活。更重要的是它在提高生产效率方面所起的作用尤为突出，体现了这次设计的主旨。 关键词：气缸盖、加工工艺、钻Φ5孔；钻、攻NPT1/8螺纹孔夹具、夹具设计 Abstract Fixture curriculum desig
n is esse
ntial for every scie
nce a
nd e
ngi
neeri
ng stude
nts, fixture desig
n a
nd research for future stude
nts a
ndworkwill provide great help. The task of this paper is to desig
n the machi
ni
ng tech
nology of cyli
nder head a
nd the special fixture for drilli
ng 5 holes a
nd for drilli
ng a
nd tappi
ng the threaded holes of NPT1/8. After fully u
ndersta
ndi
ng the structure of the parts, the bla
nk size, ma
nufacturi
ng type, be
nchmark, processi
ng tech
nology route are determi
ned, a
nd the
n accordi
ng to the desig
n of the processi
ng tech
nology route, each process is calculated. This desig
n of drilli
ng 5 holes; drilli
ng, tappi
ng NPT1/8 threaded hole fixture, i
n order to reduce dow
ntime, but also improve productio
n efficie
ncy. I
n the desig
n of this special fixture, the first step should be based o
n the a
nalysis of the process of the parts, the selectio
n of rough a
nd fi
ne be
nchmarks, a
nd the
necessary calculatio
n. The fixture i
n the desig
n of the early atte
ntio
n to structural tech
nology, so the desig
n of the fixture structure is simple, compact, more co
nve
nie
nt a
nd flexible to operate. More importa
ntly, it has played a particularly promi
ne
nt role i
n improvi
ng productio
n efficie
ncy, reflecti
ng the mai
n purpose of this desig
n. Keywords: cyli
nder head, processi
ng tech
nology, drilli
ng 5 holes, drilli
ng a
nd tappi
ng NPT1/8 thread hole fixture a
nd fixture desig
n 目录 摘要I 序言- 1- 第1章零件的分析- 2- 1.1零件的分析- 2- 1.2零件的主次表面- 2- 1.3零件表面的技术要求- 3- 1.4结构工艺性分析- 3- 第2章计算生产纲领、确定生产类型- 4- 2.1生产纲领- 4- 2.2生效率分析- 4- 2.3生产类型- 4- 第3章毛坯的制造方法- 6- 3.1确定毛坯的制造形式- 6- 3.2毛坯尺寸公差- 6- 3.3毛坯简图- 6- 第4章制订工艺路线- 7- 4.1定位基准选择- 7- 4.1.1粗基准的选择原则- 7- 4.1.2精基准选择的原则- 7- 4.2定位误差- 8- 4.3选择加工方法- 8- 4.4划分加工阶段- 8- 4.5工序的集中与分散- 9- 4.6确定工序顺序- 9- 4.7制定工艺路线- 10- 第5章加工余量、工序尺寸及公差- 13- 第6章选择加工设备及工艺装备- 15- 第7章选择切削用量、确定时间定额- 16- 第8章填写工艺文件- 22- 第9章钻床夹具设计- 23- 9.1、专用夹具的提出- 23- 9.2、夹具的定位方案- 23- 9.3、夹具的夹紧方案- 24- 9.4、导向元件的设计- 25- 9.5、夹具设计及操作简要说明- 28- 总结- 29- 参考文献- 30-