| 摘要 |
The present invention relates to a bending press apparatus for reducing a spring back, and aims to provide a bending press apparatus for reducing a spring back, which can reduce a spring back generated in materials without replacing a punch. The bending press apparatus of the present invention comprises: a top part connected to a press; an upper block connected to the top part with a fastening groove on the bottom edge; a punch inserted into the fastening groove of the upper block and fastened with a bolt, whose molding surface formed on one side contacts the materials for pressurizing and correcting the materials; a plurality of shim plates inserted into the fastening groove for being placed in between the upper block and the punch; and a low-steel connected to a bottom part, wherein the materials are put. An axis groove is formed on one side of the top of the fastening groove (10) of the upper block to be connected to the fastening groove. A rotating hill is formed on one side of the top of the punch to be inserted into the axis groove. The molding surface angle of the punch is controlled around the rotating hills inserted into the axis groove by the plurality of shim plates inserted in between the upper block and the punch, thereby securing the amount of reduction of a spring back without replacing the punch. |
