机械5

离合摇臂的加工工艺规程及钻Φ16孔夹具设计 摘要 夹具是零件加工的夹紧装置，是加工零件的一种必不可少的装置。夹具利用率高，经济性好，对功能组件的使用和数量少。随着零件的尺寸变化，越来越多的夹具被淘汰了，因此，设计一套专用夹具是十分有必要的。在设计专用夹具时要考虑工件的定位方案，工件的夹紧方案和设计夹紧机构，夹具的其他组成部分，夹具的结构形式等。 此次对离合摇臂的工艺规程及钻Φ16孔夹具设计，其零件为铸造，零件复杂的特点，由于面比孔易加工，在制定工艺规程时，就先加工面，再以面为基准来加工其它，其中各工序夹具都采用专用夹具，本次设计的专用夹具是对钻削Φ16孔进行研究。 设计之初我查阅相关数据及国内外关于机床夹具的文献，在看懂零件图的同时对零件的结构和工艺进行分析，明确粗基准和精基准的选择，确定零件的加工余量与毛坯的尺寸、从而确定零件的加工工艺过程、计算各工序的切削用量及工时。最终完成了本次设计所需的夹具。 关键词：离合摇臂、工艺规程、Φ16孔、钻削 Abstract Jig is the clampi
ng device for parts processi
ng,which is a
n esse
ntial device for processi
ng parts. The fixture has the adva
ntages of high utilizatio
n rate, good eco
nomy, a
nd less use a
nd qua
ntity of fu
nctio
nal compo
ne
nts. With the cha
nge of the size of parts, more a
nd more fixtures are elimi
nated. Therefore, it is
necessary to desig
n a set of special fixtures. Whe
n desig
ni
ng the special fixture,we should co
nsider the positio
ni
ng scheme of theworkpiece, the clampi
ng scheme of theworkpiece a
nd the desig
n of the clampi
ng mecha
nism, other parts of the fixture, the structure of the fixture a
nd so o
n. The craftsma
nship of the clutch rocker arm a
nd the desig
n of drill_16 hole clamp have the characteristics of casti
ng a
nd complicated parts. Because the surface is easier to process tha
n the hole,whe
n maki
ng the craftsma
nship rules, the surface is processed first, a
nd the
n the surface is used as the basis to process other parts. The clamp of eachworki
ng procedure adopts the special clamp. The special clamp of this desig
n is the drill. 16 holes are studied. At the begi
n
ni
ng of the desig
n, I co
nsulted the releva
nt data a
nd the domestic a
nd foreig
n literature about the machi
ne tool fixture, a
nalyzed the structure a
nd process of the partwhile readi
ng the part drawi
ng, made clear the choice of the rough datum a
nd the precisio
n datum, determi
ned the machi
ni
ng allowa
nce of the part a
nd the size of the bla
nk, thus determi
ned the processi
ng process of the part a
nd calculated the cutti
ng process of eachworki
ng procedure. Dosage a
ndworki
ng hours. Fi
nally, the fixture
needed for the desig
n is completed. Keywords: clutch rocker arm, process specificatio
n, 16 holes, drilli
ng 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机床夹具的组成1 1.3夹具设计的特点和基本要求1 1.3.1夹具设计的特点1 1.3.2设计的基本要求2 第2章离合摇臂机械加工工艺规程设计3 2.1零件的作用、设计基准及技术要求3 2.1.1零件的作用3 2.1.2零件的设计基准4 2.1.3零件的组成表面4 2.2零件加工表面的分析4 2.3零件的机械加工工艺性、材质及热处理要求4 2.3.1零件的机械加工工艺性4 2.3.2零件的材质4 2.4基准的选择及加工方案的选择与确定5 2.4.1基准的选择5 2.4.2加工方案的选择比较与确定6 2.5毛坯尺寸及加工余量的确定7 2.5.1毛坯尺寸的确定7 2.5.2加工余量的确定8 2.6机械加工机床、刀具及量具的选择9 2.7确定切削用量及基本工时10 第3章钻Ф16孔专用夹具设计20 3.1确定与选择定位方案及定位元件20 3.1.1确定定位方案20 3.1.2确定定位元件21 3.2确定与选择夹紧方案及装置21 3.2.1确定夹紧方案21 3.2.2确定夹紧元件21 3.3确定夹具体22 3.4确定导向装置23 3.5计算钻削力23 3.6计算夹紧力23 3.7计算分析定位误差24 结论25 致谢26 参考文献27