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Technical Paper

Hydromechanical Deep-Drawing of Fuel Tanks

2000-03-06
2000-01-0415
Deep-drawing with hydraulic counter pressure presents numerous advantages compared to conventional deep-drawing. Hydromechanical deep-drawing is a capable process for producing complicated and tapered-shaped stamping parts as well as parts which require excellent surface quality, i.e. outer body panels. Due to the lower costs of dies as compared to those for conventional deep-drawing, hydromechanical deep-drawing for low volume production allows for cost-savings. By using a fuel tank consisting of an upper and a lower tray as a sample, this paper discusses the various possibilities of hydromechanical deep-drawing. The described die set has an integrated multi-point draw cushion which permits material flow control through optimized blankholder forces [Aus]. In addition, a new machine concept of a 35,000 kN press, which can be used for hydroforming of tubes, extrusions, and sheets, will be presented.
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