摘要 某型导叶片机械加工工艺及其专用夹具设计，由老师发的任务书和某型导叶片零件图知，此设计大体分成两部分，一为工艺部分；二为夹具部分。 工艺部分主要包括零件的分析、毛坯余量的确定及工时计算等，详细查看某型导叶片知道，其材料为ZG1Cr13，Φ18h6外圆粗糙度Ra1.6，Φ20f7外圆粗糙度Ra1.6，叶片粗糙度Ra1.6，6N9键槽粗糙度Ra3.2，这些位置精度较高，其他的加工表面精度一般。再上网查了下叶片的资料，知道其或为散热零件，或为类似风扇叶的吹风配件。 我要设计的半精车外圆夹具。这点对我真的非常难，翻阅了三四天的资料也没找到合适的定位和夹紧方案，后来在网上查看叶片资料，在几张关于叶片夹具装配图中得到启发，尽而设计出我的夹具方案：半精车外圆夹具以叶片端面作为主定位面，叶片顶尖和侧面辅助定位，对应的定位元件为支承板、A型支承钉和A型固定式定位销； 关键词：某型导叶片；工艺分析；专用夹具设计 Abstract The machi
ni
ng process of a certai
n guide va
ne a
nd its special fixture desig
n are k
now
n from the task book issued by the teacher a
nd the part drawi
ng of a certai
n guide va
ne. This desig
n is ge
nerally divided i
nto two parts, o
ne is the process part; The seco
nd part is the fixture part. The process part mai
nly i
ncludes the a
nalysis of parts, the determi
natio
n of bla
nk allowa
nce a
nd the calculatio
n of worki
ng hours. Check a certai
n guide va
ne i
n detail a
nd k
now that its material is zg1cr13, Φ 18h6 cyli
ndrical rough
ness Ra1.6, Φ 20f7 excircle rough
ness Ra1.6, blade rough
ness Ra1.6, 6
n9 keyway rough
ness ra3.2, these positio
ns have high accuracy, a
nd other machi
ned surface accuracy is ge
neral. The
n I checked the i
nformatio
n of the lower blade o
n the I
nter
net a
nd fou
nd that it was either a heat dissipatio
n part or a blowi
ng accessory similar to the fa
n blade. I wa
nt to desig
n semi precisio
n tur
ni
ng cyli
ndrical fixture. This is really very difficult for me. After readi
ng the i
nformatio
n for three or four days, I did
n't fi
nd a suitable positio
ni
ng a
nd clampi
ng scheme. Later, I checked the blade i
nformatio
n o
n the I
nter
net a
nd got i
nspiratio
n from several assembly drawi
ngs of blade fixture, so I did my best to desig
n my fixture scheme: the semi precisio
n tur
ni
ng excircle fixture takes the blade e
nd face as the mai
n positio
ni
ng surface, a
nd the blade top a
nd side assist i
n positio
ni
ng, a
nd the correspo
ndi
ng positio
ni
ng eleme
nts are the support plate, A-type support
nail a
nd A-type fixed positio
ni
ng pi
n; Key words: a certai
n type of guide va
ne; Process a
nalysis; Special fixture desig
n 目录 摘要1 Abstract 2 第1章绪论1 1.1机床夹具与生产技术准备1 1.2机床夹具与工件加工精度和质量2 第2章叶片零件分析3 2.1叶片零件的主要作用3 2.2工艺分析3 第3章工艺规程的设计5 3.1确定零件的生产类型5 3.2确定毛坯5 3.3基准的选择6 3.3.1精基准的选择原则6 3.3.2粗基准的选择原则6 3.4主要的加工工序的工艺路线安排7 3.4.1加工工序7 3.4.2热处理工序7 3.4.3辅助工序7 3.4.4确定工艺路线7 3.5加工设备与工艺设备的选择8 3.6切削用量9 第4章叶片车床夹具设计30 4.1选择定位基准30 4.2确定夹具的结构以及夹紧机构的方案30 4.3设计整体夹具装配图30 4.4切削力的计算30 4.5分析与计算误差31 结论33 参考文献34