嘉兴学院毕业设计（论文）外文翻译

原文题目：Effect of die design in microchannel tube extrusion

摘要 微通道管(也称为多口挤压管)与sub-millimeter-diameter横截面是一个新港口开发类型的铝挤压在微尺度传热设计的基础理论。比较传统的换热器管与通道直径超过2毫米,微通道管对高传热有很大的优势-高效,重量轻,高承载能力。管生产上的主要困难是挤压舷窗死设计。在这工作中,设计研究了微通道管挤压模的数值方法和实验。缝焊管的强度和结构形成不同模具的设计。成形试验和管形成静水压力测试是为了验证管的微观结构，观察使用电子背散射衍射(EBSD)方法。

关键词 微通道管、挤压、缝焊

Abstract

Microchannel tube (also called Multi-port extrusion tube)with

sub-millimeter-diameter ports in the cross-section is a newly developed type of aluminum extrusion with the basis for its design in micro-scale heat transfer theory. Comparing to traditional heat exchanger tube with channel diameter more than 2 mm, microchannel tube has great advantage on high heat transfer efficient, light weight, high pressure bearing capacity. The main difficulty on the tube fabrication is the extrusion porthole die design. In this work, design of the extrusion die of the microchannel tube is studied with both numerical method and experiments. Seam

welding strength and microstructures of the tube formed with different designs of die are investigated. Forming experiment and hydrostatic pressure tests to the tubes formed is done for validation. And microstructure of the tube is observed using electron backscatter diffraction (EBSD) method.

Keywords: Microchannel tube; Extrusion; Seam welding

一、简介

微通道管(也称为micro-multiport管)是一种换热管排通道，其直径小于1毫米。图1显示了微通道管不同截面形状。在过去的十年里已经有越来越令人感兴趣的新型热传输管节能的性能。特别在微喷射流模式大大增加热量交换效率。另外,微通道管具有重量轻、高承载力的优点,越来越多的应用在汽车冷凝器,气体冷却器和商用/家用空调上，管的直径趋势与节能的要求更小。