Ultranarrow GMAW process with newly developed wire melting control system

被引：25

作者：

Nakamura, T ^{[1
]}

Hiraoka, K ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Joining & Interface Res Grp, Tsukuba, Ibaraki 3050031, Japan

来源：

SCIENCE AND TECHNOLOGY OF WELDING AND JOINING | 2001年 / 6卷 / 06期

关键词：

D O I：

10.1179/stw.2001.6.6.355

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An ultranarrow gap GMA welding (UNGW) process with less than 5 mm gap width has been developed in which the arc pole is strongly oscillated over the groove wall in the thickness direction. A simulation model for wire melting tip behaviour with do pulse current has been proposed and verified by observation of the tip motion in the UNGW groove. This simulation can define the optimum welding conditions to avoid welding defects. A synchronised control system consisting of a pulsed are current waveform with cyclical variation of wire feed rate has been successfully, developed on the base of the computer simulation. The newly developed UNGW system makes it possible to reduce arc heat input density sufficiently to produce an excellent weld joint with a narrow (1-2 mm) HAZ. Penetration shape control can also be achieved by this control method.

引用

页码：355 / 362

页数：8

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