Molten pool behaviors and weld forming characteristics of all-position tandem narrow gap GMAW

被引：26

作者：

Cai, X. Y. ^{[1
]}

Fan, C. L. ^{[1
]}

Lin, S. B. ^{[1
]}

Yang, C. L. ^{[1
]}

Bai, J. Y. ^{[1
]}

机构：

[1] Harbin Inst Technol, State Key Lab Adv Welding & Joining, Harbin 150001, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY | 2016年 / 87卷 / 5-8期

基金：

中国国家自然科学基金;

关键词：

Tandem GMAW; Narrow gap welding; All-position welding; Molten pool behaviors; Weld formation; ARC SYSTEM; HORIZONTAL GMAW; STEEL;

D O I：

10.1007/s00170-016-8644-y

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

A tandem gas metal arc welding system was utilized for narrow gap welding in three welding positions: flat, vertical down, and overhead welding position. The two arcs worked in two independent molten pools respectively. The molten pool behaviors were investigated and the weld forming characteristics were revealed. The results suggest the molten pool behaviors in different welding positions are different due to the action of gravity. In flat welding position, the molten pool surface is concave. In vertical down welding position, more fusion metal flow to the head of molten pool, and the molten pool is asymmetric, and the molten pool surface is more concave than that in flat welding position. In overhead welding position, more fusion metal flow to the tail of the molten pool, and the surface of the pool is convex. High quality welds for various welding positions can be acquired with an appropriate ratio of welding speed to wire feed speed.

引用

页码：2437 / 2444

页数：8

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