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이찬주(C.J. Lee),이상진(S.J. Lee),이상곤(S.K. Lee),이정민(J.M. Lee),김병민(B.M. Kim) 한국소성가공학회 2011 압출 및 인발 심포지엄 Vol.2011 No.8
The purpose of this study is to design multi-stage shape-drawing process for linear guide rail. The number of pass in multi-stage shape-drawing process was determined by capacity of drawing machine and shape-drawing force. The shape-drawing force was calculated by the section division method. The section shape of intermediate die was determined by equi-potential line in electric field analysis. The equivalent reduction ratio of area was employed to determine the section area of intermediate die. The FE-analysis and forming experiment were conducted to verify the multi-stage shape-drawing process designed by the proposed method. The shape-drawing forces in FE-analysis and experiment had a good agreement with prediction by the section division method. Un-filling rate of final product was less than about 1% of total section area.
이지영(J Y Lee),권용일(Y I Kwon),박태철(T C Park),이은정(E J Lee),권동진(D J Kwon),김찬주(C J Kim),이근호(K H Lee),서상용(S Y Seo),조형권(H G Cho),류진희(J H Ryu),나순숙(S S Na),이진우(J W Lee),김수평(S P Kim) 대한산부인과학회 1999 Obstetrics & Gynecology Science Vol.42 No.10
A case of rapidly grown, huge ovarian cyst in an 18-year old woman is presented with a brief review of literature. This tumor was measured 30x40x45 cm in size, and weighed 13kg. The pathologic diagnosis was mucinous cystadenoma, left ovary.
이찬주(C.J.Lee),김병민(B.M.Kim) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.5
Nowadays, multi-material design is a modem design concept in industry to achieve the purpose of product best, such as light-weight, cash and corrosion resistance. In this concept, a new joining method is required because of different mechanical and thermal properties of joined materials. Hybrid joining is a combination of at least two fundamental joining techniques. In this paper, the various hybrid joining methods and its joining operations are introduced such as weld-bonding, hybrid clinching, and self piercing rivet. Mechanical joining with adhesive bonding is a typical hybrid joining method. This approach is commonly adopted within the automotive and aerospace industries. Compared to solely mechanical joining method, the advantage of hybrid joining with adhesive bonding is increasing joint strength and durability and improving the ability to absorb energy under impact load. Compared to adhesive bonding method, the hybrid joining can achieve the relief of joint under peel loads and high static loads, extension of temperature range for application.