Progressive die in the body manufacturing is developing rapidly
The use of a progressive punching die or combination die in the automatic punching of a rotor, a stator plate, or in a connector operation is well known in the art of punching. In recent years, progressive stamping dies have begun to be produced in bodywork More and more extensive applications, with progressive die directly to the processing of sheet forming parts and stretching pieces. Processing of parts is also growing, eliminating the need for multi-station presses and complete sets of molds necessary for the production of the plate shear, oil, slab transport and other follow-up process. Progressive die combination has been widely used in the US automotive industry, its advantages are high productivity, low die cost, no sheet shear, and multi-station presses on the use of the ladder mode compared to save 30%. However, the application of progressive die technology is limited by the depth of the drawing, the hardening of the edges of the strip and the material to be transported. It is mainly used for simple parts with relatively shallow depth of drawing, so it can not completely replace the multi-station presses. Most of the parts should be eugenic in multi-station presses.
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