机械5

Φ106.6-R133-90°长半径弯头坡口装置设计3KW 摘要 长半径弯头（lo
ng radius elbow）是修改管路放向的管件存在于管路的系统里面，被广泛的应用在化工、石油、冶金、国防、轻工等工业中。在准备使用弯头之前需要加工坡口来使弯头在焊接时候更加紧固。国内现在一般的管道施工中，坡口加工都采用氧气-乙炔焰高温切割和手工砂轮打磨的方法。但是温升会因为手工砂轮对坡口的打磨而存在，产生热影响区，产生微裂纹并形成隐患。手工操作也会让坡口的尺寸、表面质量和形式不易保证。综合对比下，美国的坡口机材质优秀，意大利的坡口机工作稳定，日本的坡口机安全便捷，而在我国目前较落后的机身材质研究以及结构设计情况下，需学习国外先进技术，加大对弯头坡口机的研究与开发。我国现在一般制造厂内对弯头坡口的加工尚没有专用设备，加工设备复杂，没有良好安全措施。目前我国对长半径弯头坡口的研究优化变化不大，很多制造厂仍然按照落后的切割办法对弯头坡口进行加工。本文是负责研究给90°长半径弯头设计加工坡口装置。坡口装置主要由夹具、切割刀具、减速器和电动机组成。综合考虑其加工应用面、加工对象、加工精度、切割方式、安全以及成本，设计出符合我国当前现状的90°长半径弯头坡口装置。 关键词：长半径弯头；坡口装置；夹具；减速器 Abstract Elbow is the system i
nwhich the pipe fitti
ng is modified a
nd iswidely used i
n chemical i
ndustry, petroleum, metallurgy, defe
nse, light i
ndustry a
nd other i
ndustries. It is
necessary to process the groove before usi
ng the elbow to tighte
n the elbow duri
ngweldi
ng. At prese
nt i
n ge
neral pipeli
ne co
nstructio
n i
n Chi
na, groove processi
ng adopts the method of oxyge
n-acetyle
ne flame cutti
ng a
nd ma
nual gri
ndi
ngwheel gri
ndi
ng. However, the temperature risewill be caused by the gri
ndi
ng of the groove by ha
nd gri
ndi
ngwheel,whichwill produce the thermal i
nflue
ncezo
ne,whichwill cause the micro crack a
nd form hidde
n trouble. Ma
nual operatio
nwill also make the groove size, surface quality a
nd form
not easy to guara
ntee. U
nder comprehe
nsive compariso
n, the U
nited States, have excelle
nt material of beveli
ng machi
neworki
ng stability of beveli
ng machi
ne, Italy, Japa
n's security of beveli
ng machi
ne is co
nve
nie
nt, but i
n our cou
ntry at prese
nt is lower fuselage material research a
nd desig
n cases,
need to lear
n foreig
n adva
nced tech
nology, to be
nd the groove machi
ne research a
nd developme
nt. At prese
nt, there is
no special equipme
nt for the processi
ng of elbow groove i
n Chi
na, a
nd the processi
ng equipme
nt is complicated a
nd there is
no good safety measure. At prese
nt, there is little cha
nge i
n the research a
nd improveme
nt of the lo
ng radius elbow groove, a
nd ma
ny ma
nufacturers still process the curved head groove accordi
ng to the backward cutti
ng method. This article is respo
nsible for research to 90° lo
ng radius elbow desig
n processi
ng groove device. Groove device is mai
nly composed of jig, cutti
ng tool, reducer a
nd motor. Co
nsideri
ng its processi
ng a
nd applicatio
n, processi
ng object, machi
ni
ng accuracy, cutti
ngway, safety, a
nd cost, desig
ned i
n accorda
ncewith the curre
nt situatio
n of 90° lo
ng radius elbow groove device. Keywords: lo
ng radius elbow; Groove device; Fixture; reducer 目录 绪论1 第一章坡口装置的总体设计2 1.1坡口装置总体方案设计的依据2 1.2工艺分析2 1.3坡口装置主要参数的确定3 第二章坡口装置的传动部分设计7 2.1传动部分的设计7 2.2传动轴最小直径的计算8 2.3带的设计选择8 2.4齿轮的选取和设计12 第三章坡口装置的机械部分设计24 3.1轴承的选取24 3.2刀盘的设计24 3.3进给装置设计24 总结25 参考文献26 致谢27