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Sliding Mode Control of Spot Bead Welding Mobile Robot
충탄람(T. L. Chung),박순실(S. S. Park),부이트롱 휴(T. H. Bui),김상봉(S. B. Kim) 한국동력기계공학회 2004 한국동력기계공학회 학술대회 논문집 Vol.- No.-
In shipbuilding industry, it is needed to make uniform welding beads on the floor of ship. In this paper, a sliding mode controller is applied to a two-wheeled spot bead welding mobile robot (SWMR) to track a straight line and make spot bead of welding. The mobile robot, is considered in terms of dynamic model with known parameters in the presence of disturbances. To obtain the controller, two sliding surfaces of velocity tracking error and posture error are chosen, and the controller is extracted from the sliding condition to stabilize the sliding surface. The control system uses a camera sensor for measuring the errors. Also, the welding experiments are carried out to verify the proposed controller.
김영표(Young-Pyo Kim),김철희(Cheol-Hee Kim),김영곤(Young-Gon Kim),주성민(Sung-Min Joo) 대한용접·접합학회 2016 대한용접·접합학회지 Vol.34 No.3
At present, FSW(friction stir welding) process is being considered as an actual way for production of various industrial products. However FSW process involves high temperature and load on the tool during welding. These are make a difference between FSW machine and general machine tools. From this reason, development of FSW machine needs very careful consideration on stiffness of machine structure, spindle and moving axis including machine control system. In this study authors investigate on the trends of technology development of FSW machine in order to share the information for more extension of FSW technology with related researchers and engineers.
OECD 국가별 아크용접로봇과 저항스폿용접로봇의 최소자승법에 관한 연구
안덕현,김옥환 한국생산제조학회 2024 한국생산제조학회지 Vol.33 No.3
The purpose of this study is to investigate the average annual market growth rate of welding robots currently being performed worldwide using the least square method for arc welding robots and resistance spot welding robots by OECD countries. To conduct this study, we will compare and analyze the differences between arc welding robots and resistance spot welding robots in OECD countries such as the US, EU, Japan, China, and Korea. The global welding robot market is dominated by arc welding robots and resistance welding robots, and resistance welding robots have a relative advantage over arc welding robots, and the gap between the two welding robot markets is gradually widening. In particular, we review existing studies on welding robots in OECD countries, analyze them by applying the least square method of time series analysis, diagnose the problems of existing studies, and suggest future research directions.
Development of Spot Welding and Arc Welding Dual Purpose Robot Automation System
이용중,김태원,이형우,Lee, Yong-Joong,Kim, Tae-Won,Lee, Hyung-Woo The Korean Society of Manufacturing Process Engine 2004 한국기계가공학회지 Vol.3 No.4
A dual purpose robot automation system is developed for both arc welding and spot welding by one robot within a cell. The need for automation of both arc welding and spot welding processes is urgent while the production volume is not so big as to accommodate separate station for the two processes. Also, space is too narrow for separate station to be settled down in the factory. A spot welding robot is chosen and the function for arc welding are implemented in-house at cost of advanced functions. For the spot welding, a single pole type gun is used and the robot has to push down the plate to be welded, which causes the robot positioning error. Therefore, position error compensation algorithm is developed. The basic functions for the arc welding processes are implemented using the digital I/O board of robot controller, PLC, and A/D conversion PCB. The weaving pattern is taught in meticulously by manual teach. A fixture unit is also developed for dual purpose. The main aspects of the system is presented in this paper especially in the design and implementation procedure. The signal diagrams and sequence logic diagrams are also included. The outcome of the dual purpose welding cell is the increased productivity and good production stability which is indispensable for production volume prediction. Also, it leads to reduction of manufacturing lead time.
Global Market Analysis for Welding Power Source and Welding Robot (I)
이승재,Cheon Jason,김철희 대한용접접합학회 2020 대한용접·접합학회지 Vol.38 No.3
Welding power source and welding robot are the most important components of welding automation systems. In this paper, we summarized the sales and market revenues of welding power source and welding robot using the mar�ket analysis reports from 2007 to 2017. The analysis was conducted for arc welding and resistance welding, respectively. The power source market of 2017 returned to that of 2007, and the welding robot market of 2017 ap�proximately doubled that of 2007. These market trends are found to be closely related to the major application in�dustries such as the heavy industry and the automotive industry.
Global Market Analysis for Welding Power Source and Welding Robot (I)
Seungjae Lee,Jason Cheon,Cheolhee Kim 대한용접·접합학회 2020 대한용접·접합학회지 Vol.38 No.3
Welding power source and welding robot are the most important components of welding automation systems. In this paper, we summarized the sales and market revenues of welding power source and welding robot using the market analysis reports from 2007 to 2017. The analysis was conducted for arc welding and resistance welding, respectively. The power source market of 2017 returned to that of 2007, and the welding robot market of 2017 approximately doubled that of 2007. These market trends are found to be closely related to the major application industries such as the heavy industry and the automotive industry.
김용석(Yong-Seok Kim),박성호(Sung-Ho Park),양순용(Soon-Young Yang) 한국생산제조학회 2008 한국생산제조학회지 Vol.17 No.4
A new type of swivel unit is suggested in order to complement weak points of the existing. This new type of Swivel unit is developed by adopting a spring type cable which bas elasticity and restoring force. To minimize the troubles in the process of manufacturing during operating the new type system, strength analysis and the check of interference between parts are accomplished with CATIA. The check of rotating performance is also carried out to determine the diameter and length of spring type cable by SimDesigner motion analysis. Swivel unit used in the robot spot welding is developed with spring type cable and its usefulness in the industrial field is verified through experiments. This system has been registered for patent.