• Title/Summary/Keyword: Remote scanner

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Study on Robot based Remote Laser Welding (로봇 기반 원격 레이저 용접에 관한 연구)

  • Kang, Hee-Shin;Suh, Jeong;Cho, Taik-Dong
    • Laser Solutions
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    • v.11 no.4
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    • pp.21-28
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    • 2008
  • Remote Laser welding technology for manufacturing automotive body is studied. Laser welding and industrial robot systems are used for the robot based laser welding system. The laser system is used 1.6kW Fiber laser(YLR-1600) of IPG. The robot system is used HX130-02 of Hyundai Heavy Industry(payload : 130kg). The robot based laser welding system is equipped with laser scanner system for remote laser welding. The welding joints of steel plate and steel plate coated with zinc are butt and lapped joints. The quality test of the laser welding are through the observation the shape of bead on plate and cross-section of welding part. During past three years the laser system, 4kW Nd:YAG laser (HL4006D) of Trumpf was used and the robot system, IRB6400R of ABB (payload:120kg) was used. The new laser source, robot and laser scanner system are used to increase the processing speed and to improve the process efficiency. This paper introduces the robot based remote laser welding system to resolve the limited welding speed and accuracy of the conventional laser welding system.

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The Design of Manufacturing Process Optimization for Aluminum Laser Welding using Remote Scanner (원격 스캐너를 이용한 알루미늄 레이저 용접에 대한 생산 공정 최적화 설계)

  • Kim, Dong-Yoon;Park, Young-Whan
    • Journal of Welding and Joining
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    • v.29 no.6
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    • pp.82-87
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    • 2011
  • In this study, we conducted laser welding by using remote scanner that is 5J32 aluminum alloy to observe the mechanical properties and optimize welding process parameters. As the control factors, laser incident angle, laser power and welding speed were set and as the result of weldablility, tensile shear tests were performed. ANOVA (Analysis of Variation) was also carried out to identify the influence of process variables on tensile shear strength. Strength estimation models were suggested using regression alnalysis and 2nd order polynomial model had the best estimation performance. In addition optimal welding condition was determined in terms with wedalility and productivity using objective function and fitness function. Final optimized welding condition was laser power was 4 kW, and welding speed was 4.6 m/min.

Interface between Robot and Scanner for Remote Laser Welding System Based on Time Synchronization (시간 동기화에 근거한 리모트 레이저 용접 시스템에서의 로봇과 스캐너 인터페이싱)

  • Kim, Jeong-Jung;Lee, Joon-Woo;Lee, Ju-Jang;Kwon, Kyung-Up;Kang, Hee-Shin;Suh, Jeong
    • Laser Solutions
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    • v.16 no.1
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    • pp.10-14
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    • 2013
  • Remote laser beam welding (RLW) has the benefits of high speed and high quality welding, especially as applied to automotive industry. RLW is designed in a way that end effecter and head of scanner move simultaneously, and require the compensation for the motion of end effecter in order to weld proper position. In this paper, we show the algorithms of RLW that enable the end effecter to synchronize with scanner based on time. The proposed method consists of two algorithms. These algorithms make it possible for the moving end effecter to weld on desired place. The effectiveness of the algorithms is shown by experiments.

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Remote Welding of Automobile Components using CO2 Laser and Scanner (자동차 부품의 원격 레이저 용접기술)

  • Suh, Jeong;Lee, Mun-Yong;Jung, Beong-Hun;Song, Mun-Jong;Kang, Hie-Sin;Kim, Jeong-O
    • Journal of Welding and Joining
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    • v.26 no.5
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    • pp.74-78
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    • 2008
  • The laser welding of the car body and components has been spread in the automotive industry. The Nd:YAG laser welding system could be used in 3D welding with robot. However, this system cannot efficiently reduce the welding cycle time according to various welding sequences because the robot's moving time is same that of the resistant spot welding system. But the remote welding system with high power $CO_2$ laser and scanner makes it possible welding cycle time much faster than the robot laser welding system. In the $CO_2$ laser remote welding system, laser beam can be rapidly transferred to a workpiece by moving mirrors of scanner system. So, it makes reducing the cycle time of welding process and shaping various welding patterns easily. Therefore, in this paper, the characteristic of weld strength according to patterns of weld bead on $CO_2$ laser welding was investigated. Also, the relationship between shape of weld bead and value of tensile load was studied. Finally, the optimum remote welding condition for car bumper was investigated.

The characteristic of penetration on the 800Mpa class high-tensile steel using remote welding system by $CO_2$ laser ($CO_2$ 레이저 원격 용접시스템을 이용한 800Mpa급 고장력강의 용입특성)

  • Song, M.J.;Lee, Y.J.;Song, Y.C.;Jung, S.M.;Jung, B.H.;Lee, M.Y.
    • Proceedings of the Korean Society of Laser Processing Conference
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    • 2006.11a
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    • pp.17-20
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    • 2006
  • In the remote welding system using $CO_2$ laser, laser beam is rapidly deflected by moving mirrors of scanner system and has focusable distance over 1000mm from workpiece. From such arrangement, various advantages and disadvantages arise. Remote welding is a highly efficient laser process. As the mirrors of the scanner system allow positioning speeds exceeding 700m/s, it becomes possible to reduce the welding cycle time. On the other hand, as there no the provision of shielding gas which is normally required for beam powers exceeding 3kW, may become difficult task. Therefore, In this study, the influence of the various penetration of back bead by the different laser welding speed on the weld seam formation without shielding gas was investigated.

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A Study on High Speed Laser Welding by using Scanner and Industrial Robot (스캐너와 산업용 로봇을 이용한 고속 레이저 용접에 관한 연구)

  • Kang, Hee-Shin;Suh, Jeong;Kim, Jong-Su;Kim, Jeng-O;Cho, Taik-Dong
    • Proceedings of the KWS Conference
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    • 2009.11a
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    • pp.29-29
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    • 2009
  • On this research, laser welding technology for manufacturing automobile body is studied. Laser welding technology is one of the important technologies used in the manufacturing of lighter, safer automotive bodies at a high level of productivity; the leading automotive manufacturers have replaced spot welding with laser welding in the process of car body assembly. Korean auto manufacturers are developing and applying the laser welding technology using a high output power Nd:YAG laser and a 6-axes industrial robot. On the other hand, the robot-based remote laser welding system was equipped with a long focal laser scanner system in robotic end effect. Laser system, robot system, and scanner system are used for realizing the high speed laser welding system. The remote laser welding system and industrial robotic system are used to consist of robot-based remote laser welding system. The robot-based remote laser welding system is flexible and able to improve laser welding speed compared with traditional welding as spot welding and laser welding. The robot-based remote laser systems used in this study were Trumpf's 4kW Nd:YAG laser (HL4006D) and IPG's 1.6kW Fiber laser (YLR-1600), while the robot systems were of ABB's IRB6400R (payload:120kg) and Hyundai Heavy Industry's HX130-02 (payload:130kg). In addition, a study of quality evaluation and monitoring technology for the remote laser welding was conducted. The welding joints of steel plate and steel plate coated with zinc were butt and lapped joints. The quality testing of the laser welding was conducted by observing the shape of the beads on the plate and the cross-section of the welded parts, analyzing the results of mechanical tension test, and monitoring the plasma intensity and temperature by using UV and IR detectors. Over the past years, Trumf's 4kW Nd:YAG laser and ABB's IRB6400R robot system was used. Nowadays, the new laser source, robot and laser scanner system are used to increase the processing speed and to improve the efficiency of processes. This paper proposes the robot-based remote laser welding system as a means of resolving the limited welding speed and accuracy of conventional laser welding systems.

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Analysis of Weld Characteristics for Aluminum 5XXX Series Laser Welding Using 3-Dimension Remote Scanner (3차원 원격 스캐너를 이용한 알루미늄 5000 계열의 레이저 용접에서 공정 변수에 따른 용접 특성 분석)

  • Kim, D.Y.;Park, Y.W.
    • Laser Solutions
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    • v.14 no.2
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    • pp.1-7
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    • 2011
  • The latest trends of vehicle technology development are fuel efficiency improvement, body designs declining air resistance and lightweight of materials. Especially, as lightened weight of materials makes engine efficient so that vehicles keep the best performance, it is the best way to protect the environment and reduce fuel consumption. In this study, we conducted laser welding by using 3-dimension remote scanner that is 5J32 aluminium alloy. Furthermore, conduction experiment that was 3 times repeated for changing factors such as observing angle, laser power and welding speed. we observed exterior and cross section of weled part and tensile strength. When increasing laser power and decreasing laser speed, tensile strength increased. In order to evaluate factors that affect tensile strength qualitatively we conducted ANOVA. We assumed that the factors are observing angle, laser power and welding speed. Then we found that laser power and laser speed affect tensile strength. We conducted evaluation of weldability of aluminium alloy by above ways.

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A Study on the Implementation of Multimedia Remote Ultrasound Image Transfer System through ISDN (ISDN(Integrated Services Digital Network)을 통한 멀티미디어 원격 초음파 영상 전달 시스템 구현에 관한 연구)

  • 이영훈;민경선
    • Journal of Biomedical Engineering Research
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    • v.17 no.1
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    • pp.33-42
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    • 1996
  • A multimedia remote ultrasound image transfer system for tole-medical services was implemented. The image data of the ultrasound scanner system of the slave is compressed using image compression system. It is transferred to the master PC via ISDN UNI(User-Network Interface) and decompressd by image decompression system. The total system is composed of three parts; first, the image capture card which transfers bidirection- al data between ultrasound scanner system and PC, second, image compression and decompression card, finally, ISDN TA(Terminal Adaptor) card for transferring the image. This system has a easy user interface because it is executed on the basis of MS-WINDOWS. So it is capable of serving medical services at a remote place.

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3D Reconstruction of Urban Building using Laser range finder and CCD camera

  • Kim B. S.;Park Y. M.;Lee K. H.
    • Proceedings of the KSRS Conference
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    • 2004.10a
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    • pp.128-131
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    • 2004
  • In this paper, we describe reconstructed 3D-urban modeling techniques for laser scanner and CCD camera system, which are loading on the vehicle. We use two laser scanners, the one is horizon scanner and the other is vertical scanner. Horizon scanner acquires the horizon data of building for localization. Vertical scan data are main information for constructing a building. We compared extraction of edge aerial image with laser scan data. This method is able to correct the cumulative error of self-localization. Then we remove obstacles of 3D-reconstructed building. Real-texture information that is acquired with CCD camera is mapped by 3D-depth information. 3D building of urban is reconstructed to 3D-virtual world. These techniques apply to city plan. 3D-environment game. movie background. unmanned-patrol etc.

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LAND SLIDE DISPLACEMENT DETECTION USING TIME SERIES DIGITAL SURFACE MODEL ACQUIRED BY A TERRESTRIAL LASER SCANNER

  • Jeong, Jong-Hyeok;Takagi, Masataka
    • Proceedings of the KSRS Conference
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    • v.2
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    • pp.567-569
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    • 2006
  • Recently, the terrestrial laser scanner is considered as useful measurement equipment for acquiring a three-dimensional data. In this study, a terrestrial laser scanner which has +/- 2.5cm accuracy is examined whether the terrestrial laser scanner is reliable to present the tendency of landslide movement. The test area is covered by protection blocks, and they are being moved by landslide movement. Landslide movement was detected by measuring the movement of protection blocks. Totally three scenes of test area were acquired during 2004 and 2006. The three scenes of the protection blocks were registered in global coordinate system, then the landslide movement was investigated. The landslide movement detected in the three scenes was evaluated by comparing with landslide movement measured by a total station. Although the measurement accuracy of landslide using the terrestrial laser scanner was worse than the total station, the scanning data showed the tendency of landslide movement of the test area.

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