Title:
SYSTEM AND METHOD FOR LASER SCANNING-BASED RESISTANCE SPOT WELDING QUALITY ASSESSMENT
Document Type and Number:
WIPO Patent Application WO/2023/211188
Kind Code:
A1
Abstract:
The present invention relates to a system and a method for laser scanning-based resistance spot welding quality assessment and, more particularly, to a system for laser scanning-based resistance spot welding quality assessment, the system being configured to assess the quality of resistance spot welding which occurs under pressurization by a pair of electrodes. The system comprises: a welding machine for performing the resistance spot welding; a laser scanner for 3D-scanning a surface welded by the welding machine; and a controller for measuring characteristic values comprising the diameter, height, area, and volume of a surface indentation through an image scanned by the laser scanner, and controlling the welding machine. The controller predicts the nugget diameter of resistance spot welding through the characteristic values and guarantees that welding quality defects can be assessed. In addition, the method comprises: a laser scan step in which an image of the resistance spot welding surface can be scanned by the laser scanner; a characteristic value measuring step in which characteristic values comprising the diameter, height, area, and volume of a surface indentation caused by resistance spot welding can be measured by the controller; a welding quality assessing step in which the nugget diameter can be predicted through the characteristic values by the controller; a defect detecting step in which defects of resistance spot welding can be assessed through the image by the controller; and a welding machine correction step in which the electrode of the welding machine can be replaced or realigned according to the defects by the controller. In the welding machine correction step, the welding machine can be corrected on the basis of assessment of defects and prediction of the nugget diameter of the resistance spot welding performed as nondestructive tests. In addition, the present invention is advantageous in that resistance spot welding quality assessment operations can be automated, and reliability and swiftness can be obtained in connection with quality assessment.
Inventors:
PARK YEONG DO (KR)
LEE SEUNG HUN (KR)
KANG TAE YOUNG (KR)
BACK YOUNG GON (KR)
LEE SEUNG HUN (KR)
KANG TAE YOUNG (KR)
BACK YOUNG GON (KR)
Application Number:
PCT/KR2023/005764
Publication Date:
November 02, 2023
Filing Date:
April 27, 2023
Export Citation:
Assignee:
TESONE CO LTD (KR)
International Classes:
B23K31/12; B23K11/11
Foreign References:
| KR20210036522A | 2021-04-05 | |||
| KR101661665B1 | 2016-10-04 | |||
| US20160223477A1 | 2016-08-04 | |||
| KR20170119901A | 2017-10-30 | |||
| JP2012139725A | 2012-07-26 |
Attorney, Agent or Firm:
KIM, Jong Seok (KR)
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