Real-time heat input monitoring towards robust GMA brazing. (2nd January 2019)

• Record Type: Journal Article
• Authors: Makwana, Pinaac; Goecke, Sven-F; De, Amitava
• Is Part Of: Science and technology of welding & joining. Volume 24:Number 1(2019)
• Page Start: 16
• Page End: 26
• Publication Date: 2019-01-02
• Subjects: Gas metal arc brazing -- real-time monitoring -- heat input -- temperature measurement -- metal transfer -- thermal profile -- IR camera; Welding -- Periodicals; Joints (Engineering) -- Periodicals; Surfaces (Technology) -- Periodicals; 671.52
• DOI: 10.1080/13621718.2018.1470290
• Languages: English
• ISSNs: 1743-2936

Abstract

ABSTRACT: Gas metal arc (GMA) brazing of thin sheets requires active control of heat input, filler alloy deposition and temperature field on sheet surface. A novel attempt is presented here for a rapid synchronous real-time monitoring of current and voltage transients, filler alloy depositions and temperature field using, respectively, a high-frequency recorder, high-speed videography and two thermal infrared cameras during GMA brazing of galvanized steel sheets. For heat inputs from 100 to 200 J mm −1, the peak temperature varied from 1500 to 1700 K. The high-speed videography showed consistent filler deposition and bead profile. The methodology and results presented here depict a promising resource for real-time monitoring and feedback control of GMA brazing.