DETERMINATION OF GAS TUNGSTEN ARC-WELDING EFFICIENCIES

被引：25
|
作者：
DUTTA, P
JOSHI, Y
FRANCHE, C
机构：
[1] UNIV MARYLAND,DEPT MECH ENGN,COLLEGE PK,MD 20742
[2] USN,POSTGRAD SCH,DEPT MECH ENGN,MONTEREY,CA 93943
来源：
EXPERIMENTAL THERMAL AND FLUID SCIENCE | 1994年 / 9卷 / 01期
基金：
美国国家科学基金会;
关键词：
WELDING; JOINING; PROCESS MODELING; MANUFACTURING; HEAT TRANSFER; PROCESS AUTOMATION;
D O I：
10.1016/0894-1777(94)90011-6
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
A combined experimental/computational technique for the estimation of gas tungsten arc welding (GTAW) efficiencies under quasi-steady conditions is presented. The instantaneous measurements of the weld pool length ahead of and behind the electrode are obtained from digitized free surface images, using a pulsed laser vision system. Measurements of the width and depth of the pool are obtained from weld sections using optical microscopy. Based on these measurements of the actual fusion boundary created by weldpool convection and other effects, a three-dimensional model outside the molten zone in the solid material is used to determine welding efficiency. Measurements and calculations are performed for a range of power inputs and torch speeds for both grooved and ungrooved, high-yield strength steel samples. Computed efficiencies are compared with those available in the literature.
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页码：80 / 89
页数：10
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