Automatic Welding Machine With Visual Seam Tracking Sensor.

Saito, Nobuo; Hirai, Akira; Akatsu, Toshio; Nakajima, Isao; Ishimaru, Yasuo; Hamada, Kouji; Shibakita, Sadao; Mimura, Akio

doi:10.7210/jrsj.12.359

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“…The combination of a CCD camera and the slit laser light was proposed to detect the welding line. [19][20][21][22][23] Ma et al applied a CCD camera with a wideband filter for transmitting 590 to 680 nm as a visual sensor for metal inert gas (MIG) welding of a 2-mm-thick aluminum alloy. 24) The authors detected the front part of the weld pool.…”

Section: Introductionmentioning

confidence: 99%

Tracking the Welding Line in Lap Welding Using Pattern Matching

Yamane

2020

ISIJ Int.

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Lap welding is employed to join thin plate materials in car assemblies. The quality of welding depends on its conditions and seam tracking in the welding line. An arc sensor was employed by oscillating the welding torch in a thick weld. Since the welding torch was not oscillated in the welding of thin plate materials, the arc sensor could not be applied to lap welding. To trace the welding line, the weld pool in pulsed metal active gas (MAG) welding under the shielding gas of Ar 80% and CO 2 20% was pictured using a CMOS camera. The weld pool was observed in the rear to the welding direction. The features of the weld pool were investigated to recognize the welding line. Since the arc affected the brightness of the weld pool, the timing of the shutter of the CMOS camera was synchronized with the current waveform to take clear weld pool images. The welding line was detected using an image processing method. In this paper, a banalization method and a pattern matching method was investigated. The pattern matching method is useful than the binarization method. A digital controller was designed to trace the welding line. The validity of the proposed method was verified by carrying out a tracking experiment.

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Section: Introductionmentioning

confidence: 99%

Tracking the Welding Line in Lap Welding Using Pattern Matching

Yamane

2020

ISIJ Int.

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Automatic Welding Machine With Visual Seam Tracking Sensor.

Cited by 1 publication

References 0 publications

Tracking the Welding Line in Lap Welding Using Pattern Matching

Tracking the Welding Line in Lap Welding Using Pattern Matching

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