| 摘要 |
PURPOSE:To avert the deformation of bridges even if the bridges are deformed in the stage of drawing in the titled method for forming successively drawn products such as cylinders from strip-like stock at a specified pitch by providing slits to the bridges between forming parts and feed bridges. CONSTITUTION:The stock 1 is intermittently fed at the specified pitch L in the direction (b). Short holes 2a and long holes 2b are bored at the pitch L on both sides of the stock 1 in the stage I. Three slits 8 are worked in the feed direction to the bridges 5 in the stage II. The stock 1 moves toward a forming part 4 when the forming part 4 is drawn in the stage III but the slits 8 are opened to a triangular shape having a base W' and are made into the triangular slits 8a and the bridges 5 extend transversely while the feed bridges 6 are held pressed. As a result, the bridges 6 are hardly deformed in the transverse direction. Only the bridges 5 extend transversely and the bridges 6 are not deformed even if the stock is cut 7 at the end in the state IV and therefore the formed products having the size equal to the pitch L are successively obtd.
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