• 소성∙가공
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• 제12권7호
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• pp.654-661
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• 2003

A monobloc TDS(Tube Drive Shaft) has been developed by using the rotary swaging process which is one of the incremental forming process. In order to estimate the developed TDS performance characteristics such as natural frequency, strength, stiffness and mass, finite element analysis has been carried out using commercial software, MSC/NASTRAN. The calculated performance characteristics have been compared with analysis results of SDS(Solid Drive Shaft) to know how much improve the performance characteristics. Also the sensitivity analyses of design parameters for the tube length and diameter have been performed. From the analysis results, it was found that the TDS allowed for a high frequency and could be designed to be much lighter than SDS. This advantage can give possibility to tune the NVH (Noise-Vibration-Harshness) characteristics.

• 한국산학기술학회:학술대회논문집
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• 한국산학기술학회 2008년도 춘계학술발표논문집
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• pp.296-298
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• 2008

It's necessary to analyze the mechanical behaviors of automotive air-conditioner hose, which have to play a proper role under severe operating conditions, in order to prepare a preventive measure for contrary effects expected in unfavorable circumstances. In this paper, the stress and deformation characteristics of the hose components such as rubber, sleeve, pipe and reinforces braids during the swaging process, are analyzed using the finite element method.

• 소성∙가공
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• 제25권5호
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• pp.332-337
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• 2016

The automobile cowl cross bar which is a backbone frame part holding electrical and air conditioning components inside the cockpit module has been designed with more complex geometries recently due to demands of its enhanced functions and reduced weight of frame parts. The traditional manufacturing process using welding between tubes with different diameters shows several problems such as poor mechanical characteristics and appearance, etc. Therefore, in this study, one-piece manufacturing processes which can eliminate the welding process were developed by applying the rotary swaging process. CAE analyses were conducted to examine the feasibility of the process and prototypes were manufactured by using a rotary swaging machine with 4 split rotating dies and 12 head rollers. Bending tests of the manufactured prototypes confirmed that the rotary swaging process gives better mechanical properties comparing with the conventional processes.

• 한국기계가공학회지
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• 제10권3호
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• pp.39-46
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• 2011

The automotive air conditioning hose is used for connecting the components of air conditioner in a vehicle. The hose is usually manufactured by the swaging process to connect the rubber hose with the metal fitting at the end of the hose. In case that the clamping force is small, the refrigerant gas in the hose can leak locally under the severe operating circumstances. The practical test of clamping force is performed by means of the measurement of separation force. In this study, the swaging process of a hose is simulated with the finite element method, to investigate the effect of friction coefficient on the clamping force. The contact condition is used in consideration of real manufacturing process, and the material properties for the Mooney-Rivlin model is obtained by the experimental results. The result interpretations are focused on the contact forces, which is displayed graphically with respect to friction coefficient, on the surfaces between the hose and the metal fittings.