| 摘要 |
The invention relates to a method and a device for producing a bipolar plate comprising a metal-foil strip having a surface structure for a flow field, inner forms such as holes and slots in the plate, and a reference geometry on the outer form thereof. The object of the invention is to markedly increase the geometrical trueness and dimensional consistency of the bipolar plates by way of forming on a fine-blanking press, while eliminating all finishing on the contours and ensuring economic advantages. This object is achieved in that the press that is used is a hydraulic fine-blanking press having an at least three-stage progressive die, in the first stage of which a blank is cut partially free in the strip, subsequently in a second stage the surface structure is formed in the connected blank via compression-forming using a forming force of at least 2500 to 3500 kN, the inner form, the slots and the reference geometry are formed by way of cutting in, and on, the blank and then, in a third stage, cutting of the outer contour and removal of the finished blank for the bipolar plate are carried out successively in the stroke cycle. |
