BENDING METHOD FOR CORRUGATED STEEL PLATE AND BENDING PRESS

摘要

PURPOSE:To improve the loading efficiency and commodity value of a product by effecting a pressing by providing the projecting ridge formed in parallel linearly each other on the ridge line of the press-welding face of each recessed part of a male die. CONSTITUTION:A recessed pressure welding part 6 and projecting pressure welding part 7 are alternately formed in the width direction of a male die 5 and a projecting ridge 13 is formed as well downwards from the lower part of the ridge of the recessed pressure welding part 6. The projecting ridge 13 is of trapezoidal shape and integrates with the recessed pressure welding part 6 at the part of the ridge to form the trapezoidal upper edge in sharp blade shape at the lower end. Between the male die 5 and female die 15, the bending plate of steel plate 1 is located to perform the pressing of both dies 5, 15. In this case the trapezoidal projecting ridge 13 is first brought into contact with the face B' of the recessed part of the steel plate 1 floating from the female die and press welding is performed in the space with the female die 15 according to the pressing progress of the male die 5 to prevent the projecting drawing of the ridge both ends. Due to the forming face being accurately formed, the loading efficiency and commodity value of a product are thus improved.