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정성훈(Sung Hoon Jeong),김광희(Kwang-Hee Kim),육성민(Sung Min Yook),이희범(Heui Bom Lee),도성섭(Sung Sup Do) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
In this paper, a press-fit machine using a robot with servo press is proposed to change an existing press-fit machine for flexible manufacturing line. The existing machine carries out a process at a station but the new developed machine can conduct two processes and is more flexible by using a Robot because positions where parts are pressed can be freely changed. To develop this machine, centering device is used for correcting centers of the parts. The centering device has a function of locking to prevent the oscillation of the parts during moving. The locking function can prevent the extension of cycle time. Also, frame for supporting tons of repulsive force during pressing-fit is used. The frame is a plate made of steel and contact with the bracket of servo press and transfer the repulsive force to base plate fixed at floor. As a test result, the quality of press fit with bearing race and dowel pin is very good. The flexible press fit machine can be applied to parts such as plug, steel ball in engine assembly line..
자동차 차체 품질 및 생산성 향상을 위한 용접ㆍ접합 신기술
조용준(Yongjoon Cho),김인준(In-June Kim),이희범(Heui Bom Lee),장인성(In-Sung Chang),도성섭(Sung-Sup Do) 한국자동차공학회 2008 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Even though Resistance Spot Welding (RSW) and Gas Metal Arc Welding (GMAW) have been the most popular joining processes, there are still various quality issues in auto body assembly process. New high strength steel and light weight materials make the process more complicated resulting in new challenges for welding and joining. In this presentation, various approaches to solve conventional challenges are introduced. Intelligent current regulation in RSW helps to control welding current and time more stable. Cold Metal Transfer (CMT) machine for GMAW process reduces the amount of spatters and avoids manufacturing downtime. Adhesive bonding is another outstanding way of increasing body strength without any extra materials or panel thickness change. Various implementation results and benefits of the processes are also discussed.