| 摘要 |
PURPOSE:To eliminate the variance and interference of a workpiece and to improve the rigidity of the workpiece by blanking the workpieces at the same number of points as the number of products and forming the products at one time. CONSTITUTION:A sub-pad 16 presses the work piece to prevent the shift thereof in precedence to upper blanking and drawing punches 10 in the initial period of starting pressing. The blanking parts 10B of the punches 10 contact with the workpiece 1 by which blanking is started and the work piece 1 is sheared to 3 pieces. The down stream feed end of the upper die starts bending the word piece in the stage of blanking so that the retraction of the work piece after the blanking is prevented. The working parts 10A of the punches form the sheared work pieces when the upper die descends. The blanking and drawing stage are thereby completed. The work pieces are progressively fed by one pitch upon ending of the blanking and drawing stage. The products are bent by upper bending punches and lower bending punches, by which three pieces of the parts are manufactured. |
