Abstract: A workpiece transfer method is for transferring a workpiece when bending of the workpiece is performed by a press brake including a die and a punch, the workpiece transfer method including, before or after the bending: moving an upstream transferer in a transfer direction of the workpiece while pushing the upstream transferer against an end of the workpiece, the upstream transferer being located on an upstream side with respect to the press brake in the transfer direction, the end of the workpiece being an upstream end in the transfer direction; and supporting the workpiece from below by a support in conformity with a shape of the workpiece after pressing of the workpiece by the punch, and intermittently transferring the workpiece in the transfer direction, the support being located on a downstream side with respect to the press brake in the transfer direction.

Abstract: A device and method for producing an arc-shaped roll-formed part having an outer contour with a predetermined constant curvature and an inner contour with a varying curvature, having an outer contour with a varying curvature and an inner contour with a predetermined constant curvature, or having an outer contour with a varying curvature and an inner contour with a varying curvature. Circuitry obtains a third amount of movement corresponding to a sum of first and second amounts of movement of a bending roll as an amount by which the bending roll moves in a width direction during roll bending.

Abstract: There is provided a press brake that can improve forming accuracy in partial bending. A press brake includes: a conveying mechanism that intermittently conveys a workpiece; a die including a pair of shoulder portions and a groove portion located between the pair of shoulder portions, the pair of shoulder portions being arranged away from each other in a conveying direction of the workpiece and supporting a rear surface of the workpiece; a backup plate that extends on the pair of shoulder portions, covers the groove portion, and is interposed between the die and the workpiece; and a punch that moves relative to the die so as to approach the die each time the conveying mechanism stops conveying the workpiece and presses the workpiece so as to bend the workpiece within an elastic deformation region of the backup plate.

Abstract: A friction stir welding apparatus includes: a rotary tool provided with a stirring pin at its distal end; a shoulder, in which the rotary tool is inserted; a rotation driving unit, which causes the rotary tool to rotate about an axis; a pressing device, which presses the rotary tool and the shoulder against an inner corner portion; a moving device, which moves the rotary tool and the shoulder in an advancing direction along the inner corner portion; and a wire heating device, which heats a wire, which is friction-stirred together with two metal members (joining target members) by the stirring pin.