• Title, Summary, Keyword: Welding Data

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Metal Transfer Characteristics of Aluminium under Pulsed Current Metal Inert Gas Welding (알루미늄의 펄스 전류 미그 용접)

  • 최재호;최병도;김용석
    • Journal of Welding and Joining
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    • v.20 no.5
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    • pp.127-133
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    • 2002
  • In this study, metal transfer characteristics in pulsed current metal inert gas (MIG) welding of aluminum was investigated. Based on the metal transfer characteristics from direct current electrode negative MIG welding, the one drop per one pulse(ODOP) condition was predicted and compared with experimental data. The results indicated that experimental pulse range for the ODOP condition is wider than that predicted from the DCEP MIG welding data. In addition, more stable metal trnasfer behavior was obtained at the higher end of the ODOP condition.

A study on the development of an arc sensor and its interface system for a welding robot (용접로봇을 위한 아크센서 및 인?이스 시스템 개발에 관한 연구)

  • 배강열;이지형;정창욱
    • Journal of Welding and Joining
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    • v.16 no.3
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    • pp.129-140
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    • 1998
  • An interface system was developed to offer the welding capability to a robot controller which had not any embedded function for arc welding before, and also an arc sensor algorithm was proposed for weld seam tracking of the welding robot. For the interface system between the robot controller and welding equipments, data communication software and interface connections were composed. The interface system was mae to correspond welding condition, correction data, operation sequence and current status with the robot controller by mutual had shaking and digital signal transfer. Graphic user interface program developed under the environment of windows made it easy to monitor data communication and operation status, and to control welding and sensing sequence. Arc sensing algorithm proposed in this study to compensate torch position error was based on a fuzzy logic with the variables of current difference and current differenced change at torch weaving extremities. The developed interface system could be successfully implemented in between welding equipments and the robot controller, and showed normal status and exact function in data and signal communication between the systems. The whole robot welding system was then examined to verify its welding and seam tracking capabilities in horizontal fillet, vertical fillet, and 3-dimensional fillet weldment. The experiments revealed sound weld bead shapes and also good seam tracing results.

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Bead Visualization Using Spline Algorithm (스플라인 알고리즘을 이용한 비드 가시화)

  • Koo, Chang-Dae;Yang, Hyeong-Seok;Kim, Maeng-Nam
    • Journal of Welding and Joining
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    • v.34 no.1
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    • pp.54-58
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    • 2016
  • In this research paper, suggest method of generate same bead as an actual measurement data in virtual welding conditions, exploit morphology information of the bead that acquired through robot welding. It has many multiple risk factors to Beginners welding training, by we make possible to train welding in virtual reality, we can reduce welding training risk and welding material to exploit bead visualization algorithm that we suggest so it will be expected to achieve educational, environmental and economical effect. The proposed method is acquire data to each case performing robot welding by set the voltage, current, working angle, process angle, speed and arc length of welding condition value. As Welding condition value is most important thing in decide bead form, we would selected one of baseline each item and then acquired metal followed another factors change. Welding type is FCAW, SMAW and TIG. When welding trainee perform the training, it's difficult to save all of changed information into database likewise working angle, process angle, speed and arc length. So not saving data into database are applying the method to infer the form of bead using a neural network algorithm. The way of bead's visualization is applying the spline algorithm. To accurately represent Morphological information of the bead, requires much of morphological information, so it can occur problem to save into database that is why we using the spline algorithm. By applying the spline algorithm, it can make simplified data and generate accurate bead shape. Through the research paper, the shape of bead generated by the virtual reality was able to improve the accuracy when compared using the form of bead generated by the robot welding to using the morphological information of the bead generated through the robot welding. By express the accurate shape of bead and so can reduce the difference of the actual welding training and virtual welding, it was confirmed that it can be performed safety and high effective virtual welding education.

A Study on the Prediction and Control of Welding Deformation of the BRACKET TILT in Automotive Parts (I) - Application of FEA- (자동차 부품 BRACKET TILT의 용접변형 예측 미 제어에 관한 연구 (II) -유한요소법의 적용-)

  • 장경복;강성수
    • Journal of Welding and Joining
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    • v.16 no.6
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    • pp.104-112
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    • 1998
  • In the previous study, the countermeasure for welding deformation of bracket tilt is through up through experimental inspection for total process including welding process. For completeness of systematic examination of parts having sensitivity on welding deformation, the comparison and feedback between the result through simulation of welding process and experimental data is needed. In other words, it is necessary to control welding deformation that construct the prediction system for welding deformation through comparison and tuning with experimental data. In the present study, the application of FEA on welding process of bracket tilt with susceptibility to deformation is made and deformation behavior through change of welding sequence is focused on. It is used to improve the exactness of deformation analysis that three dimensional analysis for moving heat source, activated and deactivated bead element, and volume heat flux etc.

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A study on monitoring of welding signals in gas metal arc welding (GMA용접의 용접신호 모니터링에 관한 연구)

  • 신정식;김재웅;나석주
    • Journal of Welding and Joining
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    • v.9 no.3
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    • pp.34-40
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    • 1991
  • An automatic welding system was constructed with a personal computer to capture the welding data in addition to vision seam tracking for the gas metal arc welding process. The monitoring of welding signals is composed of the acquisition of welding voltage and current, obtained by using two differential amplifiers and A/D converters, and processing of the measured data. Using interrupt handing circuit for time sharing, two jobs of seam tracking and monitoring were performed at the required sampling time. Relations between welding signals and various welding circumstances were analyzed from the experimental results.

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High Efficient Welding Technology of the Car Bodies (자동차 경량화를 위한 알루미늄 합금의 강변형 가공 및 고능률 용접기술에 관한 동향)

  • Kim, Hwan Tae;Kil, Sang Cheol
    • Journal of Welding and Joining
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    • v.34 no.4
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    • pp.62-66
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    • 2016
  • The trend of the fabrication technology of high strength, high toughness aluminum alloys by the severe plastic deformation(SPD) process and the welding technology of lightweight alloys in the automobile has been studied. The lightweight aluminum alloys can reduce vehicle weight, while stringently demanding the high quality and efficient welding techniques, to produce the best weldments. Among the production technologies, welding plays an important role in the fabrication of lightweight vehicle structure. This paper covers the scientometric analysis of the severe plastic deformations of lightweight alloys and the welding technology in the automobile which are based on the published research works in the 'HPT, ECAP and rolling', and 'welding technology of the automobile' obtained from Web of Science, and deals with the details of the background data of the HPT, ECAP, and rolling of lightweight alloys, and welding technology of the automobile technology.

A Study on Selection of Gas Metal Arc Welding Parameters of Fillet Joints Using Neural Network (신경회로망을 이용한 필릿 이음부의 가스메탈 아크용접변수 선정에 관한 연구)

  • 문형순;이승영;나석주
    • Journal of Welding and Joining
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    • v.11 no.4
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    • pp.44-56
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    • 1993
  • The arc welding processes are substantially nonlinear, in addition to being highly coupled multivariable systems, Frequently, not all the variables affecting the welding quality are known, nor may they be easily quantified. From this point of view, decoupling between the welding parameters from the welding quality is very difficult, which makes it also difficult to control the welding parameters for obtaining the desired welding quality. In this study, a neural network based on the backpropagation algorithm was implemented and adopted for the selection of gas metal arc welding parameters of the fillet joint, that is, welding current, arc voltage and welding speed. The performance of the neural network for modeling the relationship between the welding quality and welding parameters was presented and evaluated by using the actual welding data. To obtain the optimal neural network structure, various types of the neural network structures were tested with the experimental data. It was revealed that the neural network can be effectively adopted to select the appropriate gas metal arc welding parameter of fillet joints for a given weld quality.

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Development of robot welding program for gantry-type robot using neutral CAD data format (CAD중립파일을 이용한 켄트리형 ROBOT 자동용접 프로그램개발)

  • CHUNG JAEHOON;SHEEN DONGMOK
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • pp.79-84
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    • 2004
  • In this study, a robot welding programming system is developed for gantry-type robot using a neutral CAD data format. The system automatically extracts welding line data from tile CAD model represented in IGES format and generates a robot program based on the weld line extracted. The welding program is simulated jar verification by using IGRlP, a virtual manufacturing solution. The robot welding programming system is demonstrated with a simple example.

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Multi-sensor based expert system for arc welding (다중 센서 정보에 의한 아크 용접 전문가 시스템)

  • 전의식;오재웅
    • 제어로봇시스템학회:학술대회논문집
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    • pp.797-800
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    • 1992
  • Much experience and knowledge is needed in welding because there are many working parameters and quantitative description is difficult. Therefore, introduction of expert system based on such data base has been required. In this study, welding heat and shape of bead was controlled by fuzzy inference with the welding condition, position error and voltage and current error of robot. For this, torch trajectory of robot was generated by modeling the working data with CAD and then welding was carried out through down loading to robot. And working error was controlled by on-line communication.

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Automatic Welding Carriage Control System with Self Diagnostic and Network functions (자가 고장진단 및 네트워크 기능을 보유한 자동용접 캐리지 제어 시스템)

  • 김종철;문형순;김종준;김용백;윤동섭;추정복
    • Proceedings of the KWS Conference
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    • pp.138-139
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    • 2003
  • This paper describes the control system which was designed and implemented for a new automatic welding equipment. The system has the self diagnostic function which facilitates maintenance and repairs, and also has the network function via which the welding task data call be transmitted and the welding process data can be monitored.

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