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，导向装置的选择等等。 本次设计研究的对象是对称扁台螺纹轴。设计内容包括2个方面：1、工艺分析；2、钻Ф16孔钻床专用夹具设计。对称扁台螺纹轴的作用是支承转动零件并与之一起回转以传递运动、扭矩或弯矩。从零件结构分析入手，合理选择定位基准，各种刀具参数选择以及切削用量的选择等。在安排工艺过程时，根据加工要求不同，需要进行粗精加工。另外还确定了切削参数，加工工时，填写工艺过程卡片和工序卡片。专用夹具设计内容有：确定定位方案及元件，确定夹紧方案及元件，确定导向装置，计算切削力及夹紧力等。 关键词：对称扁台螺纹轴、工艺、Ф16孔、钻床、专用夹具 ABSTRACT At a time of rapid eco
nomic growth, the rapid developme
nt of ma
nufacturi
ng today. No
n-sta
ndard parts size, structure is ever-cha
ngi
ng. Previously desig
ned u
niversal fixtures, more a
nd more face elimi
natio
n. Therefore, the desig
n a
nd productio
n of special fixture morewidely. The mai
n research co
nte
nts of the special fixtures are the positio
ni
ng scheme, the determi
natio
n of the clampi
ng scheme, the positio
ni
ng eleme
nts, the selectio
n of the clampi
ng eleme
nts, the selectio
n of the guidi
ng device a
nd so o
n. The object of this desig
n study is a symmetrical flatbed threaded shaft. Desig
n i
ncludes two aspects: 1, process a
nalysis; 2, drilli
ngФ16 hole drilli
ng fixture desig
ned. The role of the symmetrical flat-bed threaded shaft is to support the rotati
ng part a
nd rotatewith it to tra
nsmit the motio
n, torque or be
ndi
ng mome
nt. From the structural a
nalysis of parts to startwith a reaso
nable choice of positio
ni
ng sta
ndards, avariety of tool parameters a
nd the choice of cutti
ng dosage. I
n the process of scheduli
ng, accordi
ng to differe
nt processi
ng requireme
nts, the
need for rough fi
nishi
ng. I
n additio
n, it also determi
nes the cutti
ng parameters,worki
ng hours, fill i
n the process card a
nd process card. Special fixture desig
n co
nte
nt: determi
ne the positio
ni
ng programs a
nd compo
ne
nts, to determi
ne the clampi
ng programs a
nd compo
ne
nts, to determi
ne the guide to calculate the cutti
ng force a
nd clampi
ng force. Keywords: Symmetrical flatbed screw shaft, tech
nology,Ф16 hole, drilli
ng machi
ne, special fixture 目录 摘要I ABSTRACT II 1绪论1 1.1机床夹具的概述1 1.2机床夹具的分类1 1.3机床夹具的组成2 1.4机床夹具的发展方向3 2零件的作用、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4 2.4零件的形位公差4 3零件的工艺分析及设计5 3.1确定零件的生产类型及毛坯的制造形式5 3.1.1确定零件的生产类型5 3.1.2确定毛坯的制造形式5 3.2基准的选择与确定6 3.3加工工艺路线的确定7 3.4加工设备及加工装备的选择7 3.5确定加工余量8 3.6计算切削用量、基本时间及辅助时间9 4钻Ф16孔专用夹具设计23 4.1定位方案及装置的确定23 4.1.1设计定位方案应满足的要求23 4.1.2定位方案的确定23 4.1.3定位元件的确定23 4.2夹紧方案及装置的确定24 4.2.1设计夹紧装置应遵循的原则24 4.2.2夹紧装置满足的基本要求25 4.2.3夹紧方案的确定25 4.2.4夹紧元件的确定25 4.3夹具体的设计25 4.4导向方案的选择27 4.4.1钻模的选择27 4.4.2钻套的选择27 4.5计算钻削力和夹紧力29 4.5.1计算钻削力29 4.5.2计算夹紧力29 4.6分析与计算定位误差30 结论31 致谢32 参考文献33