摘要 本设计是调整臂外壳的加工工艺及专用夹具设计。考虑零件在机床运行过程中所受冲击不大，零件结构又比较简单，故选择铸件毛坯。它的主要加工面是孔、调整臂的几个端面和槽，在加工中由于面的加工精度要比孔的加工精度容易保证。因此，在设计中采用先面后孔的原则，并将孔与平面的加工划分为粗加工和精加工阶段，以保证加工精度。在本设计中，先以R41外圆加工出两端面，再以该基准面加工相应的孔。在后面的工序中，均以该孔与端面为定位基准，加工调整臂的孔、槽和一些端面，在整个加工过程中，分别采用了铣床、钻床和车床。并设计了铣侧面、镗孔和铣槽等的专用夹具，并对它们的定位都采用了一面两销定位。由于该零件的尺寸不大，所需的夹紧力不大。因此，夹紧方式都采用手动夹紧，它的夹紧简单，机构的设计更为方便，满足夹紧要求。 关键词：调整臂外壳零件，毛坯、加工工艺，专用夹具，定位，夹紧 bstract The shell desig
n is the adjustme
nt of the processi
ng tech
nology boom a
nd exclusive fixture desig
n. Co
nsider the parts i
n the machi
ne is ru
n
ni
ng is
not the hardest hit, spare parts a
nd relatively simple structure, the choice of rough casti
ngs. Its mai
n processi
ng is the hole surface, adjusti
ng the
number of face a
nd arm slot, i
n the process of machi
ni
ng accuracy due to face processi
ng tha
n the hole to e
nsure the accuracy of easily. Therefore, the use i
n the desig
n after the first hole of the pri
nciple of surface a
nd hole a
nd two-dime
nsio
nal processi
ng is divided i
nto roughi
ng a
nd fi
nishi
ng stages to e
nsure the machi
ni
ng accuracy. I
n this desig
n, the first R41 at both e
nds of the cyli
ndrical surface processi
ng, a
nd the
n base-level processi
ng of the correspo
ndi
ng hole. The processes behi
nd both holes with the e
nd of the baseli
ne for positio
ni
ng, processi
ng to adjust the arm holes, slots, a
nd some face i
n the whole process,
namely the use of a milli
ng machi
ne, drilli
ng machi
ne a
nd lathe. A
nd the desig
n of the side milli
ng, bori
ng a
nd milli
ng fixture dedicated ducts a
nd their locatio
n use the side of the two targeted marketi
ng. Due to the size of the parts do
not, the clampi
ng force is
not required. Therefore, the clampi
ng mea
ns are ma
nually clampi
ng, clampi
ng it simple, more co
nve
nie
nt for the desig
n of i
nstitutio
ns to meet the requireme
nts clampi
ng. Key words: Adjustme
nt arm shell parts, rough, processi
ng tech
nology, a dedicated fixture, positio
ni
ng, clampi
ng 目录 摘要I bstract II 目录III 第一章绪论1 第二章:概述2 2.1夹具的现状几生产对其提出新的要求2 2.2现代夹具的发展发向3 2.3机床夹具及其功用4 2.4机床夹具在机械加工中的作用5 2.5机床夹具组成和分类6 2.6机床夹具的分类7 2.7机床夹具设计特点9 2.8机床夹具的设计要求10 第三章零件的分析11 3.1零件的工艺分析11 第四章工艺规程设计14 4.1确定毛坯的制造形式14 4.2基面的选择14 4.3制定工艺路线14 4.4机械加工余量、工序尺寸及毛坯尺寸的确定16 4.5确立切削用量及基本工时18 第五章夹具设计34 5.1钻夹具设计34 5.2定位基准的选择34 5.3切削力和夹紧力计算35 5.4定位误差分析36 5.5夹具设计及操作的简要说明37 参考文献38 致谢39