| 摘要 |
PURPOSE:To execute at high speed bending of four sides of the end part of a work by one set of machine by bending upward or bending downward the end part of the work clamped by a clamp die and a fixed die, by turning an arm by an arm driving means. CONSTITUTION:A work 60 which has been carried in onto a table is stopped in the center of a bending machine body 1, a bending height is determined, and thereafter, the end of the work is clamped by a clamp die 2 and a fixed die 3. Subsequently, the work end is bent by driving an upward bending die 4 or a downward bending die 5. In case of the upward bending, a force of a cylinder CY2 is transmitted directly to the die 4, and in case of the downward bending, the force is transmitted to the mold 5 through a connecting plate 17 and an arm 18b, and the work 60 is bent to an acute angle or an obtuse angle. In this case, a moving extent of a rack 21, namely an eccentric quantity is brought to NC control. Also, the work 60 is determined with respect to its width, hit against a back gauge, and in case when bending of four sides is executed by motion of a drawing-back rotation, it is executed by setting the back-and-forth motion to the minimum. |
