• Title/Summary/Keyword: 용접모니터링

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A study of weld monitoring using light emission in Aluminum 6K31 laser welding (알루미늄 6K31의 레이저 용접에서 Light Emission을 이용한 용접부 모니터링에 관한 연구)

  • 박영환;이세헌;박현성;신현일
    • Proceedings of the KWS Conference
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    • 2003.11a
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    • pp.52-54
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    • 2003
  • In automotive industry, light weight vehicle is one of issues because of air pollution. Therefore, automotive manufacturers have tried to apply light materials such as aluminum to car body. Welding aluminum using laser has some advantages good weld quality and high productivity. In this study, light emission which is generated in aluminum 6k21 welding with laser is measured using photodiodes. Analysis of relationship between sensor signals of welding variables and formation of keyhole and plasma is performed.

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Monitoring the Welding Gap/Profile with Visual Sensor (시각센서를 이용한 용접 Gap/Profile 모니터링)

  • Kim, Chang-Hyeon;Choe, Tae-Yong;Lee, Ju-Jang;Seo, Jeong;Park, Gyeong-Taek;Gang, Hui-Sin
    • Proceedings of the Korean Society of Laser Processing Conference
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    • 2005.06a
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    • pp.3-8
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    • 2005
  • The robot systems are widely used in the welding manufacturing. The essential tasks to operate the welding robot are the acquisition of the position and/or shape of the parent metal. For the seam tracking or the robot automation, many kinds of contact and non-contact of the system which monitors the shape of the welding part is described. This system uses the line-type structured laser diode and the visual sensor. It includes the correction of radial distortion which is often found in the image from the camera with short focal length. Direct Linear Transformation (DLT) is used for the camera calibration. The three dimensional shape of the parent metal is obtained after simple linear transformation. Therefore, the system operates in real time. Some experiments are carried out to evaluate the performance of the developed system.

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Measurement of Surface Temperature for Real Time Monitoring of the GMA Welding Processes (GMA용접공정의 실시간 모니터링을 위한 표면온도 측정)

  • 부광석;조형석
    • Proceedings of the KWS Conference
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    • 1994.10a
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    • pp.111-114
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    • 1994
  • This paper describes a method to measure a weldment surface temperature for estimating variations of the weld pool size in the gas metal arc(GMA) welding processes. An Infrared sensing system is designed to measure the radiation emitted from the top surface of the weldment, The interference effect of the electric arc to the measurement is rejected by detecting the low peaks of the noisy signal. An optimizing criterion, in which the correlation between the weld quality and the measured temperature is maximized, is also proposed to determine the optimal measurement location.

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