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STS316L의 초층용접 시 최적의 용접조건 선정에 관한 연구
박창언 ( Chang Eun Park ),정재원 ( Jae Won Jeong ) 조선대학교 공학기술연구원 2010 공학기술논문지 Vol.3 No.1
Recent trends of robotic arc welding system have been focused on the development of new process in order to achieve better quality, higher productivity and cost savings in welding process. In case of manufacturing the full penetrated welding for the high quality welds or pipeline has be made along the weld joint. Thus the root-pass welding is very important to be selected carefully. Since the rob tic GTA(Gas Tungsten Arc) welding is particularly a complex process to produce high quality joints for stainless metal, a capability of full automation based on how to establish a mathematical model that can predict the result of the actual welding process and how to select the optimum welding condition should be required. Therefore deciding the optimal welding condition is an effective method on basis of the experimental data. However, using a trial-and-error method from the beginning in such a wide area, determination of the optimal condition requires too many numbers of experiments. In this study, an intelligent algorithm to determine welding parameter for loot-pass and welding position in pipeline welding has been proposed.
박창언 ( Chang Eun Park ) 조선대학교 공학기술연구원 2008 공학기술논문지 Vol.1 No.2
This paper discusses on the on the development of an intelligent system for the robotic Gas Metal Arc(GMA) welding process using arc force sensor. Arc force sensing information should be continually updated by utilizing the neural network in an adaline-madaline mode which can constitute the dynamic part of the expert system`s knowledge base. Accumulated knowledge might be manipulated by the expert system`s inference engine and subsequently controlled the robotic welding process in concern. The system developed is capable of predicting the weld bead size after receiving static knowledge information regarding joint geometry, component material and loading conditions.
GMA용접에서 비드단면형상을 예측하기 위한 실험적 모델의 개발
손준식,김일수,박창언,김인주,정호성,Son Joon-Sik,Kim Ill-Soo,Park Chang-Eun,Kim In-Ju,Jeong Ho-Seong 대한용접접합학회 2005 대한용접·접합학회지 Vol.23 No.4
Generally, the use of robots in manufacturing industry has been increased during the past decade. GMA(Gas Metal Arc) welding process is an actively Vowing area, and many new procedures have been developed for use with high strength alloys. One of the basic requirement for the automatic welding applications is to investigate relationships between process parameters and bead geometry. The objective of this paper is to develop a new approach involving the use of neural network and multiple regression methods in the prediction of bead geometry for GMA welding process and to develop an intelligent system that visualize bead geometry in order to employ the robotic GMA welding processes. Examples of the simulation for GMA welding process are supplied to demonstrate and verify the proposed system developed using MATLAB. The developed system could be effectively implemented not oかy for estimating bead geometry, but also employed to monitor and control the bead geometry in real time.
GMA 용접공정을 이용한 오픈갭 수평고정관 초층 용접의 실험적 연구
김지선,김일수,박창언,나현호,이지혜,정성명,Kim, Ji-Sun,Kim, Ill-Soo,Park, Chang-Eun,Na, Hyun-Ho,Lee, Ji-Hye,Jung, Seong-Myeong 대한용접접합학회 2011 대한용접·접합학회지 Vol.29 No.3
Since welding process for most pipelines with large diameter has been carried out by the manual process, automation of the welding process is necessary for the sake of consistent weld quality and improvement in productivity. Therefore the development of the optimized algorithm to decide the welding condition is an effective technique to prove the feasibility of interface standards and intelligent control technology to increase productivity and reduce the cost of system integration. In this study, the pipe welding experiment has been carried out using plused GMA welding process to select optimal welding condition. And necessary information in root-pass welding has been obtained by applying in the pipeline using the selected welding conditions through the welding experiment.
이준용(Jun-Yong Lee),박창언(Chang-Eun Park),김일수(Il-Soo Kim),최영도(Young-Do Choi) 한국마린엔지니어링학회 2010 한국마린엔지니어링학회 학술대회 논문집 Vol.2010 No.4
Recently, a study related to fluid, is widely applied to in the field of new and renewable energy. Application of fluid engineering in the field of wind power Generation are actively conducted. In the case of cross-flow type vertical axis wind turbine, power coefficient is located the lower range of TSR as compared with horizontal axis wind turbine. To examine this result of the cause, Flow characteristics of cross-flow type vertical axis wind turbine is examined. The result shows that there is relatively higher pressure on the blade suction side than of pressure side in the opposite to wind direction. Therefore, the region makes flow resistance to rotor rotation and then, hydraulic loss of the turbine increase accordingly.
김일수(Ill-Soo Kim),박창언(Chang-Eun Park),김대호(Dae-Ho Kim) 한국유체기계학회 1998 유체기계 연구개발 발표회 논문집 Vol.- No.-
This paper presents the development of a two-dimensional model for investigating the fluid flow in water jet and calculating the velocity and pressure distributions. The mathematical formulation as a standard k-εmodel was solved employing a general thermofluid-mechanics computer program, PHOENICS code, which is based on the Semi-Implicit Method Pressure Linked Equations(SIMPLE) algorithm. The developed code was applied to water jet design to determine the nozzle size, and investigated the effect of the change of nozzle location. Calculated results showed that the flow pattern is not changed as the change of nozzle location.
김일수(Ill-Soo Kim),박창언(Chang-Eun Park),정영재(Young-Jae Jeong),송창재(Chang-Jae Song),김학형(Hak-Hyoung Kim),박주석(Ju-Seog Park) 한국유체기계학회 1999 유체기계 연구개발 발표회 논문집 Vol.- No.-
The biggest challenge facing today manufacturing industry is better quality and high productivity. From an economic point of view, productivity is the most important parameter, as high productivity will reduce the cost. However, the customers of day are not only cost concerned, but also quality conscious. So high accuracy levels should also be achieved in the manufacturing process. This paper reports the development of a automatic design system based on AutoCAD program. This work is composed of three section that are design of top down menu, impeller and casing for pump programed by AutoLISP language and runned Windows system. The developed system ultimately generates the design for a pump through AutoCAD program. In the design of the pump, it needs about 23 hours with an expert, but this system can be only 80 seconds without an expert.