Abstract: A press brake is provided with a hydraulic cylinder configured to move an upper table and a lower table relative to each other in a vertical direction, and a control unit configured to control a hydraulic circuit of the hydraulic cylinder, in which the control unit manages a predictor of an occurrence of an abnormality in the hydraulic circuit including a first pressure control valve configured to control a back pressure of hydraulic oil on a first port side of the hydraulic cylinder.

Abstract: A press brake is provided with a hydraulic cylinder configured to move an upper table and a lower table relative to each other in a vertical direction, and a control unit configured to control a hydraulic circuit of the hydraulic cylinder, in which the control unit manages a predictor of an occurrence of an abnormality in the hydraulic circuit including a first pressure control valve configured to control a back pressure of hydraulic oil on a first port side of the hydraulic cylinder.

Abstract: A press brake includes a first guide rail on one side, a second guide rail on another side, an ATC device and a first measurement portion movable on the first guide rail, and a second measurement portion movable on the second guide rail. The first and second measurement portions measure a bent angle of a workpiece. The second guide rail is different from the first guide rail in their cross-sectional shapes. The first measurement portion includes a main unit having a sensor, and a first coupling portion coupling the main unit with the first guide rail. The second measurement portion includes the main unit, and a second coupling portion different from the first coupling portion coupling the main unit with the second guide rail. The ATC device and the measurement portions can be made coexistent and the main units of the measurement portions can be made identical to each other.

Abstract: A press brake includes a first guide rail on one side, a second guide rail on another side, an ATC device and a first measurement portion movable on the first guide rail, and a second measurement portion movable on the second guide rail. The first and second measurement portions measure a bent angle of a workpiece. The second guide rail is different from the first guide rail in their cross-sectional shapes. The first measurement portion includes a main unit having a sensor, and a first coupling portion coupling the main unit with the first guide rail. The second measurement portion includes the main unit, and a second coupling portion different from the first coupling portion coupling the main unit with the second guide rail. The ATC device and the measurement portions can be made coexistent and the main units of the measurement portions can be made identical to each other.

Abstract: A system for manufacturing lamp tubes formed in a circular configuration features a plurality of carrier devices attached to a transfer apparatus which links a lamp-tube-softening apparatus, a bending apparatus and an exhaust apparatus, respectively, in an endless or continuous manner. Each carrier device which receives and holds a sealed lamp tube from a supply source or station can thus return to its starting position after completing its passage around the lamp-tube-softening apparatus, the bending apparatus and the exhaust apparatus, respectively.