Title:
VARIABLE-POLARITY THREE-WIRE GAS-SHIELDED INDIRECT ARC WELDING METHOD AND DEVICE, AND USE THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/036206
Kind Code:
A1
Abstract:
A variable-polarity three-wire gas-shielded indirect arc welding method. A welding process is performed by means of three welding wires and two variable-polarity power sources; before welding, a main wire (3) is connected to one pole of each of the two variable-polarity power sources (1, 2), and the remaining two side wires (4, 5) are connected to the other pole of each of the two variable-polarity power sources, respectively; and a welding workpiece (6) is not connected to the two variable-polarity power sources. During welding, the two variable-polarity power sources are started at the same time, the two variable-polarity power sources work synchronously, and the polarities of the variable-polarity power sources connected to the main wire are always the same. By means of periodic positive and negative polarity transformation of the polarities of the variable-polarity power sources, the distribution of a magnetic field surrounding the welding wires is periodically regulated, thereby realizing a welding process of periodic swinging during coupling of indirect arcs. Said method regulates arc deflection, realizes the accurate distribution of energy of a welding arc heat source, and solves the problems of generation of a burn-through defect during high-speed welding of a thin plate and non-melting of a side wall and arc striking of the side wall during narrow gap welding of a thick plate. The present invention also relates to a variable-polarity three-wire gas-shielded indirect arc welding device and use of variable-polarity three-wire gas-shielded indirect arc welding.
Inventors:
LIU LIMING (CN)
SONG GANG (CN)
ZHANG ZHAODONG (CN)
WANG HONGYANG (CN)
SONG GANG (CN)
ZHANG ZHAODONG (CN)
WANG HONGYANG (CN)
Application Number:
PCT/CN2020/075670
Publication Date:
March 04, 2021
Filing Date:
February 18, 2020
Export Citation:
Assignee:
UNIV DALIAN TECH (CN)
International Classes:
B23K9/16
Foreign References:
| CN110497065A | 2019-11-26 | |||
| CN109079287A | 2018-12-25 | |||
| CN101745725A | 2010-06-23 | |||
| CN104772552A | 2015-07-15 | |||
| CN106914708A | 2017-07-04 | |||
| CN102069265A | 2011-05-25 | |||
| JPH08224667A | 1996-09-03 | |||
| RU2418661C1 | 2011-05-20 |
Attorney, Agent or Firm:
DALIAN EAST PATENT AGENT LTD. (CN)
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