[논문]자동차용 브레이크 튜브 및 플레어 너트의 제조에 관한 연구

한규택

Abstract ▼ AI-Helper

The purpose of the present paper is to investigate the optimal shape of the brake tube-end and flare nut for automobiles using the $DEFORM^{TM}-3D$, finite element code. A flare nut is a small and important part used to join a brake tube-end in automobiles. In this instance, we studied th...

The purpose of the present paper is to investigate the optimal shape of the brake tube-end and flare nut for automobiles using the $DEFORM^{TM}-3D$, finite element code. A flare nut is a small and important part used to join a brake tube-end in automobiles. In this instance, we studied the optimal forging processes for the tube-end and flare nut. Finite element analysis has been carried out to predict an optimal shape of the tube-end and flare nut. Also the simulation results were reflected to the forging processes design for the tube-end and flare nut. The shape of the tube-end and flare nut is in agreement with the finite element simulation and the test results.

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가설 설정

2. The stress which the material receives becomes bigger when the stroke of the first punch is 2.5mm and the non-uniform stresses happened at the outside of formin_음 part.
3. The distribution of the stress is uniform when the stroke of the first punch is 3mm. Also we could get similar shape most with the shape of the real brake tube-end.
In this present paper, we simulated the forming parts of tube-ends using the DEF0RM™-3D, commercially available finite element code. Based on the simulation results, we proposed the design condition of forming process for achieving the optimal shape of the tube-end. Also, finite element analysis has been carried out to predict an optimal shape of the flare nut and its simulation results were reflected to the forging processes design for the flare nut.
In this study we designed a multi-stage forming process to promote the manufacturing process of the flare nut. After modeling the flare nut by the 3D CAD program, finite element analysis has been carried out using the commercial finite element code.

제안 방법

Part "A" and "C" take the role of the outflow suppression of the oiland the protection of the screw looseness at the same time. The purpose of this study is to find the condition under which the length of the part "A" and the angle of the part "C" become the optimal. To find the optimal condition we used the I-DEAS and the DEFORM™-3D (Oh et al.
In this study, the conditions to decide the optimal shape of the brake tube-end and flare nut for automobiles are studied using finite element analysis and the experimental tests. In the experiment, a specially designed piece of equipment for open-die forging was used and the forming processes were performed with a hydraulic press forming machine.
In this study, the tube material used is SPCC and it is drawn to the shape dimension decided after roll forming and then forming to the structure of a double-wall. The mechanical properties and chemical compositions of the SPCC tube are as follows:

이론/모형

The purpose of this study is to find the condition under which the length of the part "A" and the angle of the part "C" become the optimal. To find the optimal condition we used the I-DEAS and the DEFORM™-3D (Oh et al., 1991), commercially available finite element code for analysis.

성능/효과

4. After the simulation of the open-die forging process using the rigid-plastic FEM, it was possible to predict the weak part of the die and the material and its results were reflected in the die design, and finally a product of good quality can be obtained.
5. FEM simulation results have shown that the distribution of the stress and strain is uniform.
6. The analysis results by FEM simulation were reflected in the forging processes design for the flare nut and better products in dimension and quality were obtained.

참고문헌 (6)

Sekhon, G. S., Gupta, N. K., and Gupta, P. K., 2003, 'An analysis of external inversion of round tubes,' Journal of Material Processing Technology, Vol. 133, pp. 243-256

상세보기
Bonet, J., and Kulasegaram, S., 2000, 'Correction and stabilization of smooth particle hydrodynamic methods with applications in metal forming simulations,' International Journal for Numerical Methods in Engineering, Vol. 47, pp. 1189-1214

상세보기
Kharmanda, G., Mohamed, A., and Lemaire, M., 2002, 'Efficient reliability-based design optimization using hybrid space with application to finite element analysis,' Structural and Multi-disciplinary Optimization, Vol. 24, pp. 233-245

상세보기
Kikuchi, N., 2003, 'Substructure design using a multidomain multi-step topology optimization approach,' SAE World Congress, Detroit, Michigan, March 3-6, SAE Paper: 03B-125, pp. 135-148
Im, Y. T., 2002, 'Optimal design of dimension of extrusion die with single stress ring,' Transactions of Materials Processing, Vol. 11, No.4, pp. 363-370

원문보기 상세보기
Kwon, H. H., 2002, 'Die design for the cold forging spur gears,' Journal of the KSMTE, Vol. 11, No. 1, pp. 120-126

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자동차용 브레이크 튜브 및 플레어 너트의 제조에 관한 연구
A Study on the Manufacturing of Brake tube and Flare nut for Automobiles 원문보기

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자동차용 브레이크 튜브 및 플레어 너트의 제조에 관한 연구 A Study on the Manufacturing of Brake tube and Flare nut for Automobiles 원문보기

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자동차용 브레이크 튜브 및 플레어 너트의 제조에 관한 연구
A Study on the Manufacturing of Brake tube and Flare nut for Automobiles 원문보기

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