Topic
Hydroforming
About: Hydroforming is a research topic. Over the lifetime, 2796 publications have been published within this topic receiving 26293 citations. The topic is also known as: Bulge forming.
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TL;DR: In this article, the loading path for hydroforming process of copper joint is determined using a fuzzy controller, and the final goal is to obtain a calibrated product without any wrinkling or tearing.
Abstract: Tube hydroforming of thin-walled parts ratio of the thickness to the diameter is too low and mainly depends on the process control parameters (the internal pressure and the axial feeding). These parameters determine the occurrence of forming limits, such as wrinkling and bursting. Trial-and-error method is not a convenient method to find loading path since it is costly. Convectional loading paths, which may easily result in a product with defects, cannot be used in this case. In this study, the loading path for hydroforming process of copper joint is determined using a fuzzy controller. The final goal is to obtain a calibrated product without any wrinkling or tearing. It is shown that the wrinkling, except severe wrinkling, is a repairable defect, while bursting is an irreparable defect. Simulation of the process is done by using finite element method in combination with a designed fuzzy controller. The Abaqus scripting interface is used for modeling the part and communicating with the Abaqus kernel. The explicit method is utilized to overcome convergence problems encountered in the implicit method.
19 citations
TL;DR: In this article, a hemispherical part formed in the single-sheet process has been considered and the results obtained by this analysis have been compared with the experimental results, and the effects of the parameters of workhardening, friction and blank size have been taken into considerations.
19 citations
TL;DR: In this article, an optimization of load paths in hydroforming of angled tubes is investigated through statistical methods in conjunction with FEA and simulated annealing algorithms, where the main aim is to improve the tube formability by applying the optimal load parameters.
Abstract: An optimization of load paths in hydroforming of angled tubes are investigated through statistical methods in conjunction with FEA and simulated annealing algorithms. The main aim of this study is to improve the tube formability by applying the optimal load parameters. A new method to design the optimal load paths is represented and it is applied to optimize the load curves in hydroforming of X- and Y- tube shapes. By the aid of proposed method, the tube is formed with good formability indicators and lower capacity of equipments. Comparing the results of this study with the experimental data confirm the effectiveness of the method.
19 citations
TL;DR: In this paper, the authors proposed different types of micro-punches that can be used in conjunction with floating-based micro-tube hydroforming (THF) die set-up.
19 citations
TL;DR: The investigations showed the possibilities of the new forming process, as well as the advantages of FEA methods used to pre-define the process parameters, and an online measurement device to describe the mold-filling behavior is introduced.
Abstract: The material behavior of two different types of paperboard was characterized in tensile tests and in a new test device called paperboard bulge test. A particularly adapted hydroforming process was used to produce three-dimensional paperboard structures. Furthermore, an online measurement device to describe the mold-filling behavior is introduced. The experimental results were compared to the results obtained with an FEA investigation. The investigations showed the possibilities of the new forming process, as well as the advantages of FEA methods used to pre-define the process parameters.
19 citations