| 摘要 |
The invention relates to a method for producing flanged drawn parts from a metal blank (10, 12) by using a drawing punch (1) with at least one cutting edge (9) or rounded portion (91), a blank holder (7) and a drawing die (2), wherein the drawing die (2) has a wall region (4), a flange region (3) and a supporting region (6) for the blank (10, 12), the blank (10, 12) is placed on the supporting region (6) of the drawing die (2) and is shaped into the drawn part and trimmed at the flange region (3) by moving the drawing punch (1) into the drawing die (2). The object of providing such a method and such a device that allow a simpler construction of the tool, a self-centring system and at the same time a reliable, dimensionally accurate production of flanged drawn parts is achieved by the supporting region (6) being formed in an elevated and stationary manner with respect to the flange region (3), the difference in height (4) corresponding at least to the wall thickness of the blank (10, 12), and the cutting edge (9) or rounded portion (91) provided on the drawing punch (1) engaging with a rounded portion (8) or cutting edge (81) provided at the transition between the supporting region (6) and the flange region (3) while the drawing punch (1) is moving into the drawing die (2), and so regions of the blank (10, 12) that project beyond the flange region (3) are cut off during the further drawing operation. |
