Patent ID: 7536893
Filing Date: 2009-05-26
Classification: B21D

Abstract:
1. An automatic bending machine for automatically bending a strip blade material, the automatic bending machine comprising: a CW-direction bending tool provided with, at a top portion thereof, a first bending tool support and a first ring having a concentric hole, and at a bottom portion thereof, a second bending tool support and a second ring having a concentric hole; a CCW-direction bending tool provided with, at a top portion thereof, a third bending tool support and a third ring having a concentric hole, and at a bottom portion thereof, a fourth bending tool support and a fourth ring having a concentric hole; a shaft disposed so as to penetrate through the concentric holes of the first ring, the second ring, the third ring and the fourth ring; a first ring relief groove provided between at least one of (i) the CW-direction bending tool and the first ring, and (ii) the CCW-direction bending tool and the third ring, the first ring relief groove being configured so as to accommodate therein a portion of one of the first ring and the third ring; and a second ring relief groove provided between at least one of (i) the CW-direction bending tool and the second ring, and (ii) the CCW-direction bending tool and the fourth ring, the second ring relief groove being configured so as to accommodate therein a portion of one of the second ring and the fourth ring; wherein the shaft is provided with a nozzle gate through which the strip blade material is fed, and wherein the CW-direction bending tool or the CCW-direction bending tool is turned in a clockwise direction or a counterclockwise direction, respectively, to strike the strip blade material for bending it.