Title:
WELD SEAM FORMATION CONTROL APPARATUS AND METHOD
Document Type and Number:
WIPO Patent Application WO/2020/258712
Kind Code:
A1
Abstract:
A weld seam formation control apparatus and method based on visual sensing of the front of the weld pool, relating to the technical field of welding quality control; using structured light to illuminate the concave surface of the weld pool, and using a visual sensor (4) to acquire a corresponding structured light image; acquiring the collapse feature amount of the weld pool by means of image processing; and adjusting the welding current in real time to keep the collapse feature amount of the weld pool constant; thus, a uniform weld seam back width can be acquired to achieve uniform weld seam penetration. Control of the weld seam formation is implemented only on the basis of the structured light information of the front of the weld pool; the present invention can be used for the non-filled direct current tungsten electrode gas shielded welding of tight butt joints, and is especially suitable for non-pad welding of large aluminium alloy structural components in the field of aerospace manufacturing.
Inventors:
DU DONG (CN)
PENG GUODONG (CN)
XUE BOCE (CN)
WANG LI (CN)
CHANG BAOHUA (CN)
PENG GUODONG (CN)
XUE BOCE (CN)
WANG LI (CN)
CHANG BAOHUA (CN)
Application Number:
PCT/CN2019/121403
Publication Date:
December 30, 2020
Filing Date:
November 28, 2019
Export Citation:
Assignee:
UNIV TSINGHUA (CN)
International Classes:
B23K31/02
Foreign References:
| CN110193679A | 2019-09-03 | |||
| CN204221169U | 2015-03-25 | |||
| CN103506756A | 2014-01-15 | |||
| CN109202283A | 2019-01-15 | |||
| US5481085A | 1996-01-02 | |||
| KR101683044B1 | 2016-12-12 |
Other References:
ZHANG, YUMING: "Non-official translation: Research on Front Vision Adaptive Control of TIG Welding Fusion", DOCTORAL DISSERTATIONS FOR THE DEGREE OF ENGINEERING OF HARBIN ENGINEERING UNIVERSITY, 31 December 1990 (1990-12-31), DOI: 9160304
Attorney, Agent or Firm:
CN-KNOWHOW INTELLECTUAL PROPERTY AGENT LIMITED (CN)
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