机械5

摘要 在经济飞速向前的当下，制造业快速发展的今天。非标零件的尺寸、结构也千变万化。以往设计的通用夹具，越来越多的面临淘汰。所以专用夹具的设计与生产越来越广泛。专用夹具的研究其主要内容有定位方案、夹紧方案的确定，定位元件、夹紧元件的选择等。 本次设计的题目是支撑座的加工工艺及夹具设计。研究的对象是支撑座。设计内容包括2个方面：1、工艺分析；2、钻零件主视图4-M4均布贯穿螺纹孔钻床专用夹具设计。支撑座是传动装置中重要的支承零件。支承回转或者其他工作元件，传递相应的转速、运动和动力。 工艺设计的内容有完成零件结构的分析，设计了2种加工零件的方法，选择了比较合适的一条，填写工艺卡。选择了零件的加工基准，选取了加工余量，计算出了相应的切削数据，填写了工序卡，完成了零件图还有毛坯图。 专用夹具的主要内容有：根据工序图上面的定位和夹紧简图，设计钻零件主视图4-M4均布贯穿螺纹孔钻床专用夹具，采用的机床是Z3040摇臂钻床。设计了定位和夹紧方案，选择了定位和夹紧元件。选择标准件钻套等等。最后，完成了装配图还有所有非标零件图的绘制，编写了设计说明书等。 关键词：支撑座、加工工艺、4-M4均布贯穿螺纹孔、钻床、专用夹具 Abstract I
n the curre
nt fast-movi
ng eco
nomy, the ma
nufacturi
ng i
ndustry is developi
ng rapidly today. The size a
nd structure of
no
n-sta
ndard parts are also ever-cha
ngi
ng. More a
nd more commo
n fixtures desig
ned i
n the past are faci
ng elimi
natio
n. Therefore, the desig
n a
nd productio
n of special fixtures is more a
nd more exte
nsive. The mai
n co
nte
nts of the research of special fixtures i
nclude positio
ni
ng scheme, determi
natio
n of clampi
ng scheme, selectio
n of positio
ni
ng compo
ne
nts a
nd clampi
ng compo
ne
nts. The title of this desig
n is the processi
ng tech
nology a
nd fixture desig
n of the support base. The object of the study is the support base. The desig
n co
nte
nt i
ncludes two aspects: 1. Process a
nalysis; 2. The mai
n part of the drill part is 4-M4 u
niform cloth through the threaded hole drilli
ng machi
ne special fixture desig
n. The support base is a
n importa
nt support compo
ne
nt i
n the tra
nsmissio
n. Supports swivel or otherworki
ng eleme
nts that deliver the correspo
ndi
ng speed, motio
n a
nd power. The co
nte
nt of the process desig
n has the a
nalysis of the completed part structure, a
nd the two methods of processi
ng the parts are desig
ned. A more suitable o
ne is selected a
nd the process card is filled out. The machi
ni
ng refere
nce of the partwas selected, the machi
ni
ng allowa
ncewas selected, the correspo
ndi
ng cutti
ng datawas calculated, the operatio
n cardwas filled out, a
nd the part drawi
ng a
nd the bla
nk drawi
ngwere completed. The mai
n co
nte
nts of the special fixture are: accordi
ng to the positio
ni
ng a
nd clampi
ng diagram above the process diagram, the mai
n part of the drilled part is desig
ned to be 4-M4 u
niform through the threaded hole drilli
ng machi
ne. The machi
ne tool used is the Z3040 radial drilli
ng machi
ne. The positio
ni
ng a
nd clampi
ng schemewas desig
nedwith the positio
ni
ng a
nd clampi
ng eleme
nts selected. Choose sta
ndard drill sleeves a
nd more. Fi
nally, the assembly drawi
ng a
nd the drawi
ng of all
no
n-sta
ndard parts drawi
ngswere completed, a
nd the desig
n specificatio
nswerewritte
n. Keywords: support seat, processi
ng tech
nology, 4-M4 u
niform cloth through threaded hole, drilli
ng machi
ne, special fixture 目录 摘要I Abstract II 第1章绪论1 1.1机床夹具的组成1 1.2机床夹具的分类1 1.3机床夹具的发展趋势2 1.4夹具设计的特点和基本要求3 1.4.1夹具设计的特点3 1.4.2夹具设计的基本要求3 第2章零件的作用、组成表面及技术要求4 2.1零件的作用4 2.2零件的组成表面4 2.3零件的技术要求5 第3章零件的工艺分析及设计6 3.1确定零件的生产类型及毛坯的制造形式6 3.1.1确定零件的生产类型6 3.1.2确定毛坯的制造形式6 3.2基准的选择与确定8 3.2.1粗基准的选择与确定8 3.2.2精基准的选择与确定8 3.3加工工艺路线的选择，比较与确定9 3.4加工设备及加工装备的选择10 3.5确定加工余量11 3.6计算切削用量及加工工时12 第4章专用夹具的设计22 4.1定位方案及装置的确定22 4.1.1设计定位方案应满足的要求22 4.1.2定位方案的确定22 4.1.3定位元件的确定22 4.2夹紧方案及装置的确定23 4.2.1设计夹紧装置应遵循的原则23 4.2.2夹紧装置满足的基本要求23 4.2.3夹紧方案的确定24 4.2.4夹紧元件的确定24 4.3夹具体的设计24 4.4对刀装置—钻套的选择25 4.5计算钻削力25 4.6计算夹紧力26 4.7分析与计算定位误差26 结论28 致谢29 参考文献30