Upsetting formed automobile framework piece progressive die and using method thereof
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The invention relates to an automobile die, in particular to an upsetting formed automobile framework piece progressive die and the using method thereof. The structure of the progressive die enables a panel veneer to form a required automobile framework piece, the process totally comprises nine times of drawing, two times of edge cutting, three times of shaping (upsetting), two times of bending as well as final punching, edge cutting and waste material cutting; the two times of edge cutting are respectively combined with the seventh drawing and the eighth drawing in the nine times of drawing to be one procedure, independent edge cutting is not performed, two times of bending are respectively combined with the front two times of shaping in the three times of shaping into one procedure, and independent bending is not performed. The die and the method have the advantages that the complexity of the die is simplified so as to improve the production efficiency of the automobile framework piece; the problem of incapability of tapping on the outer side of the drawing end part of a thin plate drawing piece is solved; further, the possibility of cracking of a middle panel veneer during the shaping (upsetting) process is further lowered; and the replacement efficiency of a damaged female die is reduced during the drawing and shaping (upsetting) process.