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전륜 서스펜션 성능향상을 위한 하이드로포밍 샤시 부품의 설계 최적화
문만빈(M. B. Moon),김윤규(Y. G. Kim),김효섭(H. S. Kim),진경수(K. S. Jin),김동학(D. H. Kim) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.5
Recently, automotive companies have invested in vehicle weight reduction and clean car development because of oil price rises and environmental problems. In particular, USA car makers have developed the vehicle spending 1 liter per 34km complying with PNGV(Partnership for a new generation of vehicle) and Europe car makers have developed the vehicle spending 3 liters per 100km. The USA government announced “The green car policy” in order to boost production of more fuel effective cars in 2009. According to the policy, it will be restricted to sell the car which spends more than l liter per 14.9km by 2020. To satisfy the current situations on automotive market, hydroforming technology has widely adapted vehicle structures such as engine cradle, chassis frame, A pillar, radiator support, etc. However, automotive companies have to consider formability and performance to improve and maximize the benefit from this technology in advance of detail design. The paper deals with one of the vehicle weight reduction methods using tube hydroforming technology and platform commonality in front suspension. FEA simulation is also introduced to evaluate hydro-formability and NVH performance at the beginning of design stage which is the best way to reduce the failure cost.
엄인섭(I. S. Um),김윤규(Y. G. Kim),문만빈(M. B. Moon) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
Coupled Torsion Beam Axle (CTBA) has been widely used for rear suspension of small vehicle because of its simple structure and small number of parts. Torsion beam and Trailing arm are the main parts of it and control vehicle by torsional stiffness during cornering. This paper presents the results of design and prototyping for trailing arm using hydroforming technology. And we studied optimum design of trailing arm through FEA and the effect of durability performance.
진경수(K. S. Jin),김윤규(Y. G. Kim),문만빈(M. B. Moon) 한국소성가공학회 2010 한국소성가공학회 학술대회 논문집 Vol.2010 No.10
The Corrosion Resistant Alloy pipes are widely used in various industry applications to prevent corrosion of steel pipe. Resource, energy, cost saving and weight reduction is a very important practice for the future as well as for today. Bi-Metal structural tube applied chemical bonding and heat shrink fit at this point in time has some problem, which is deterioration of coherence force between inner and outer tube, complex manufacturing process, high cost and deterioration of reliability. This paper deal with mechanical characteristics, experimental result and development of multi layer structural tube, which is mechanically joint and bonded by tube hydroforming process applied deformation of Elasticity-Plasticity between inner and outer tube.
김황석(H.S. Kim),윤승채(S.C. Yoon),임희중(H.J. Im),김영진(Y.J. Kim),문만빈(M.B. Moon) 한국전산유체공학회 2012 한국전산유체공학회 학술대회논문집 Vol.2012 No.5
This paper presents a study of air-knife which controls coating thickness in continuous galvanizing line(CGL). In the process of steel strip coating, it is necessary that the gas from air-knife nozzle impinge on moving strip with minimum pressure loss for high line speed and thin film coating. In the present study, the impinged pressure distributions on the strip are analyzed with various air-knife nozzle geometries. The lip length, angle of lip, and shape of lip are chosen as main parameters of air-knife nozzle geometries. The numerical simulations are performed using the FLUENT commercial code. The governing equations are consisted of 2-D Navier-Stokes equations and standard k- e turbulence model to solve turbulent flow field. The result obtained show that the non-rounded lip is influenced, by lip angle. However, the rounded lip is not influenced, by lip angle but lip length and radius of round.