CONSUMABLE ELECTRODE ARC WELDING METHOD AND WELDER

Title:

CONSUMABLE ELECTRODE ARC WELDING METHOD AND WELDER

Document Type and Number:

WIPO Patent Application WO/2002/018086

Kind Code:

A1

Abstract:

A consumable electrode wire (1) serving as a preceding wire in the direction of the welding is placed generally parallel to a filler wire (2) serving as a succeeding wire. A current is supplied from a welding power supply and flows through a feeding terminal (4a), the consumable electrode wire (1), an arc (12), a molten pool (8), a base metal (3), and a ground wire (7) to the ground terminal. An electric resistor (20) is connected between the base metal (3) and the ground terminal of the welding power supply (5). Therefore the current Ib flowing through the base metal to the ground terminal is limited by the electric resistor (20). The voltage difference caused across the electric resistor (20) results in an increase the ratio of the current If branching into the filler wire (2) to the welding current Iw, and the increase of the branching current increases the heat generated by the filler wire (2). As a result, even if the amount of movement of the filler (2) increases, the Joule heat is sufficiently generated, and the fusion mixing of the filler wire (2) in the molten pool is complete.

Inventors:

IKEGAMI YUICHI (JP)
YOKOYAMA TAKASHI (JP)
NAKATA JITSUO (JP)
MIYAUCHI HIDEKI (JP)
YAMAMOTO HIKARU (JP)
SENZAKI MASAFUMI (JP)

Application Number:

PCT/JP2001/007583

Publication Date:

March 07, 2002

Filing Date:

August 31, 2001

Export Citation:

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Assignee:

AIR WATER INC (JP)
HITACHI CONSTRUCTION MACHINERY (JP)
IKEGAMI YUICHI (JP)
YOKOYAMA TAKASHI (JP)
NAKATA JITSUO (JP)
MIYAUCHI HIDEKI (JP)
YAMAMOTO HIKARU (JP)
SENZAKI MASAFUMI (JP)

International Classes:

B23K9/00; B23K9/10; B23K9/173; B23K9/18; (IPC1-7): B23K9/12

Foreign References:

JPS59223168A	1984-12-14
JPH08132231A	1996-05-28

Other References: