机械5

碟板的机械加工工艺规程及加工4-M8底孔专用夹具设计 摘要 夹具是现在生产制造业加工非标零件的重要工具，也是机床上不可或缺的一部分。制造业涉及的行业比较的多，零件的外形和构造也是千变万化，很多通用夹具逐步的退出了历史的舞台。所以，针对不同的零件设计配套的夹具是非常有价值的。 本次设计的题目是碟板的机械加工工艺规程及加工4-M8底孔专用夹具设计，根据图纸要求进行机械工艺规程设计和专用夹具设计，在掌握零件作用基础上，对零件的工艺进行分析。 针对设计给定的题目，设计出钻削4-M8底孔的专用钻床夹具。里面的知识点主要有对机床夹具进行设计、公差等。先对需要加工的零部件进行了解，分析，以便更加精确的对其进行加工，确定加工零件的标准；然后对每一个步进行计算，要算出每一道工序的切削用量；夹具设计包括：设计出对零件进行定位，夹紧，还有引导的各个元件。在这里我们尤其要注意的是，夹具在定位零部件的时候，会产生误差，这个误差要在我们的合理控制范围以内，我们要充分了解夹具的优缺点，以便改进。 通过上面的设计、分析和计算，圆满的完成了本次设计的所有任务，在巩固大学所学知识的同时，还为自己步入社会夯实基矗 关键词：碟板；4-M8；钻床夹具；设计 Abstract Jig is
now a
n importa
nt tool for ma
nufacturi
ng productio
n a
nd processi
ng
no
n-sta
ndard parts, but also a
n i
ntegral part of the machi
ne. Compariso
n of multi-i
ndustry ma
nufacturi
ng i
nvolved parts of the shape a
nd structure is cha
ngi
ng, ma
ny commo
n fixtures graduallywithdrew from the stage of history. So, for differe
nt parts of the desig
n supporti
ng jig it isveryvaluable. The graduatio
n project is e
ntitled machi
ni
ng process pla
n
ni
ng a
nd processi
ng 4-M8 bottom outlet dedicated fixture desig
n dish plate, mecha
nical a
nd process pla
n
ni
ng accordi
ng to special fixture desig
n drawi
ngs, mastered the role of part based o
n the part of the processes a
nalysis. Desig
ned for a give
n problem, desig
n a bottom hole drilli
ng 4-M8 special drill jig. Paper i
nside k
nowledge of the mai
n poi
nts of the machi
ne tool fixture desig
n tolera
nces. First
need to u
ndersta
nd parts processi
ng, a
nalysis, i
n order to be more accurate processi
ng, to determi
ne the sta
ndard machi
ni
ng parts; the
n calculated for each step, the amou
nt to be calculated every step of cutti
ng; fixture desig
n i
nclude desig
n the parts for positio
ni
ng a
nd clampi
ng, aswell as thevarious eleme
nts of the guide. I
n particular,wewa
nt to
note here is that the jig positio
ni
ng of parts,will produce a
n error, the error should bewithi
n our reaso
nable co
ntrol,we
need to fully u
ndersta
nd the adva
ntages a
nd disadva
ntages of the fixture i
n order to improve. Through the above desig
n, a
nalysis a
nd calculatio
n, the successful completio
n of all the tasks of the graduatio
n project, i
n the co
nsolidatio
n of the u
niversity is k
nowledge, but also lay a solid fou
ndatio
n for themselves i
nto the commu
nity. Keywords Disc; 4-M8; drilli
ng jig; Desig
n 目录 摘要I Abstract II 第1章绪论1 1.1机床夹具的发展概述1 1.2机床夹具的组成及分类1 1.2.1机床夹具的组成1 1.2.2机床夹具的分类2 1.3夹具设计的基本要求3 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4 第2章零件的分析5 2.1零件的作用5 2.2零件的工艺分析5 2.2.1零件组成表面6 2.2.2零件加工的要求6 2.2.3零件形位公差要求7 2.3毛坯制造形式及结构的确定7 第3章零件加工工艺规程设计8 3.1定位基准的选择8 3.2加工工艺路线的确定8 3.3加工方法、加工刀具及量具的选用9 3.4加工余量的确定10 3.5切削用量及切削时间的确定11 第4章专用夹具设计23 4.1定位方案及定位元件的确定与选择23 4.2夹紧方案及装置的确定与选择24 4.3夹具体的设计与确定25 4.4导向装置的确定26 4.5钻削力的计算及受力分析26 4.6定位误差的计算26 4.7定位误差分析27 结论28 致谢29 参考文献30