• 제목/요약/키워드: 맞춤판재

검색결과 3건 처리시간 0.026초

맞춤판재 용접용 3차원 비젼 감시기 개발 (Developement of 3-D Vision Monitoring System for Tailored Blank Welding)

  • 장영건;이경돈
    • 한국정밀공학회지
    • /
    • 제14권12호
    • /
    • pp.17-23
    • /
    • 1997
  • A 3-D vision system is developed to evaluate blanks' line up and monitor gap and thickness difference between blanks in tailored blank welding system. A structured lighting method is used for 3-D vision recognition. Images of sheared portion in blanks are irregular according to roughness of blank surface, shape of sheared geometry and blurring. It is difficult to get accurate and reliable informations in the case of using binary image processing or contour detection techniques in real time for such images. We propoe a new energy integration method robust to blurring and changes of illumination. The method is computationally simple, and uses feature restoration concept, different to another digital image restoration methods which aim image itself restoration and may be used in conventional applications using structured line lighting technique. Experimental results show this system measuring repeatability is .+-. pixel for gap and thickness difference in static and dynamic tests. The data are expected to be useful for preview gap control.

  • PDF

Tailored Blank 용접을 위한 감시제어장치 개발 (Development of Monitor & Controller for Tailored Blank Welding)

  • 장영건;유병길;이경돈
    • 한국정밀공학회:학술대회논문집
    • /
    • 한국정밀공학회 1996년도 추계학술대회 논문집
    • /
    • pp.323-327
    • /
    • 1996
  • Gap and thickness difference information between blanks are often necessary for tailored blank welding quality evaluation , optimum welding parameters selection and evaluation of shearing machine, blink allocation device accuracy and clamping device. We develope 3D vision system and camera unit using structured lighting for this purpose. A simple ar d efficient scheme for gap and thickness feature recognition Is developed as well as measurements. Experimental results shows this system measuring accuracy is 10 ${\mu}{\textrm}{m}$ and 16${\mu}{\textrm}{m}$ for gap and thickness difference respectively The data are expexed to be useful for preview gap control.

  • PDF

보론강 용접 맞춤 판재의 고온 에릭슨 커핑 평가 (Formability Evaluation of Tailor Welded Blanks of Boron Steel Sheets by Erichsen Cupping Test at Elevated Temperature)

  • 김영일;김지훈;김용;이문용;문영훈;김대용
    • 소성∙가공
    • /
    • 제20권8호
    • /
    • pp.568-574
    • /
    • 2011
  • The combination of tailor welded blank (TWB) and hot stamping often offers improved crash-worthiness and reduced mass of stamped parts in the automobile body. To investigate the formability of laser TWB and the reliability of weld line, the present study used 22MnB5 boron steel sheet of the same thickness and used the Erichsen cupping test at elevated temperatures. The effects of laser direction, die temperature, weld line positions and forming speed on formability(the limiting dome height) were studied and the results were compared with the formability of the base material.