文档介绍：毕业设计说明书
题目名称:制冷热交换器U型管自动成型机设计——夹紧机构设计、弯管机主机部分设计
院系名称: 机电学院
班级: 机自 072
学号: 200700314216
学生姓名: 赵乐朝
指导教师: 樊瑞
2011年 03月
摘要
小U型管的弯制方法有很多,相应的设备也有很多,但大多数都是用手动或机械弯管机加工生产出来的,而且多为冷弯。在实际中通常是根据生产对U管的质量要求选择相应的弯管机进行加工。本课题旨在寻求一种新的弯管工艺,在保证弯管质量的前提下尽可能提高弯管的速度。
本着以上的目的,本课题研究设计了一款液压全自动U型管弯管机,所加工的管材为硬铜管。它具有生产效率较高,制造成本低。整台机器共有以下几部分组成:送料夹紧和送料机构、弯曲夹紧机构、弯曲机构和切断机构四大部分组成。,其它的机构均采用了液压传动。弯管方式采用辗压。在弯管的过程中,定模保持不动,固定在旋转平台上的动模进行靠模完成管子的加工。
由于主要采用了液压传动的传动方式,和其它的液压设备相同,该液压全自动弯管机在传动上大为简化,缩短了传动链,从而提高了动力的传动效率。本设备可以一次完成两根管料的同时加工,所以加工效率较高。另外本设备还有一个很大的特点:在生产过程中采用了芯轴机构来减弱管子弯曲截面的椭圆度和内壁管子内壁的褶皱。同时由于芯轴机构中顶推弹簧的顶推作用,弯曲过程中管子外壁的开裂现象得到了很好的解决。
Abstract
There are many bending method of Small U-tube, so the corresponding device is a lot. But most bending machine is manual or mechanical processing, and mostly is cold .In practice; the select of bending machine is usually based on the quality of the production requirements on U tube. This topic seeks to find a new elbow technology, in ensuring the quality of pipe bends under the premise of improving the speed as much as possible.
In the above purpose, the research design of a hydraulic automatic U-tube bending machine, the processing of copper pipe as hard. It has higher production efficiency, low manufacturing cost. The whole machine is a total of the ponents: Feeding clamping and feed mechanism, clamp body bending, bending bodies and cut off the bodies of four parts. In addition to cutting off body by a low-power power three phase induction motor drive, the other agencies are using a hydraulic transmission. Rolling Elbow is adopted. In the bending process, scheduled to die remain intact, fixed on the rotating platform, the dynamic model for the tube plete the processing by the module.
Since the main use of the hydraulic drive transmission, and other similar hydraulic equipment, automatic bending machine of the hydraulic drive on the greatly simplified, reducing the transmission chain, resulting in improved