管件液壓成形側推製程之研究

利治育

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管件液壓成形側推製程之研究

A Study on Axial Feeding Process in Tube-Hydroforming

利治育 , Masters　　Advisor：陳復國　　

繁體中文

油封；田口法；管件液壓成形；前副車架；有限元素法；負載路徑； seal ； Taguchi Method ； tube-hydroforming ； front sub-frame ； finite element analysis ； loading path

Abstract │ Reference (35) │ Altmetrics

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In automotive industry, the tube-hydroforming technique has an highly effect on improving lightweight and high strength for car body structure. This study begins with the research of feeding process in the tube-hydroforming technique. Then, it focuses on the analysis of applying the tube-hydroforming technique to the front sub-frame trailing arm.
This thesis first demonstrates the analysis procedures and analysis parameters in feeding process. By analyzing the seal geometry parameters and process parameters, the results of seal forces taken in different parameters are examined. Besides, an optimum seal design is established with the use of the Taguchi Method. As for available pushover area, an influence analysis is used to investigate the geometry parameters and the process parameters. This thesis presents various geometry and process parameters of available pushover area. In the future, the result can be applied to the preliminary forming analysis. 
In addition, this thesis dwells on the tube-hydroforming applied to a front sub-frame trailing arm. First, the initial feasibility analysis is determined by combining section analysis and vehicle information with the analysis of the available feeding area. Then, in order to conform the modelling to the real situation, using the same mandrel as the one used in reality is necessary during the tube bending process. As for pre-forming process, modifying the pre-forming modelling makes the tubular product fit in with the cavity model. Also, it helps form the better pre-forming quality for the following processes. In the tube-hydroforming process, the initial loading path is first determined following the empirical formula published in references. After making use of the design to find the deficiency of the process, the different loading paths are necessary to be conducted in the optimization analysis for improving. Then, the available loading paths can be used into the case. The result of the study can be the reference of developing tube hydroforming for the front sub-frame trailing arm.

Reference ( 35 ) 〈TOP〉

[1] M. Koc and O. N. Cora, "Introduction and state of the art of hydroforming", Hydroforming for Advanced Manufacturing, M. Koc, Woodhead Publishing Limited, Cambridge, UK, 2008.
[2] H. Singh, "Tubular Hydroforming Tool Design", Fundamental of Hydroforming, Society of Manufacturing Engineers, 2003.
[3] M. Krie, “State of the Art of Sealing Techniques for Hydroforming Tools, Hydroforming of Tubes, Extrusions and Sheet Metals”, International Conference on Hydroforming, Felbach, Germany, pp. 441-461, 1999.
[4] Y.-C. Shin, S.-J. Lim, H.-J. Choi, and D.-J. Yoon, “Additional material feeding method by plunger shape design for hydroforming of triangular tubes”, Journal of Engineering Manufacture, Vol. 229, 4, pp. 616-622, 2014.
[5] D. Gearing and D. Mevissen, "Hydroforming Systems, Equipment,Control and Tooling", Hydroforming for Advanced Manufacturing, M. Koc and ed., Woodhead Publishing Limited, Cambridge, UK, 2008.

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