BENDING DEVICE FOR MEATLLIC PLATE

摘要

[Problem] To provide a bending device with a novel structure capable of efficiently bending a metallic plate without scratching or denting the plate.;[Solution] A device (10) for bending a metallic plate (W) mounted on a pair of movable plates (35, 35) by applying pressing force to the metallic plate by an upper die (20) along a central axis (X), wherein against the biasing force of a coil spring (45), the movable plates move with the extension of the metallic plate during bending, and therefore the metallic plate is not scratched. The upper surface of each of the movable plates is a perfect flat surface, and therefore does not dent the metallic plate being subjected to the pressing force by the upper die. When the pressing force and the load of the metallic plate are removed after the completion of bending, swing members return to the original position thereof, and the movable plates are also returned to the original position thereof by the biasing force of the coil spring, with top parts (42) of fastening members (41) coupling the movable plates to fixed plates (38) functioning as a stopper and holding the movable plates at the original position.

主权项

1. A metal plate bending device comprising a lower die having a main body with a pair of semi-circular cross-sectional recesses formed on an upper surface thereof in a symmetric design with respect to a center line and a pair of swingable members swingably received in said recesses respectively, and an upper die arranged above said lower die movably along the center line, wherein said upper die is moved toward a metal plate mounted on said lower die to impart a press-push force to the metal plate to thereby cause the swingable members to swing and at the same time bend the metal plate along the center line, characterized in that each of said swingable member has a movable plate unfixedly mounted on an upper surface of said swingable member, and spring means for providing a biasing force to move said movable plate in a mutually separating direction, said spring means still allowing said movable plate to move in a mutually approaching direction toward said swingable member against said biasing force along with expansion of the metal plate during the bending operation, said movable plates providing a completely flat metal plate supporting surface, and said spring means being positioned externally to provide no interfere with said flat metal plate supporting surface.