Abstract: The present invention is to enable accurate formation of an elongate member while suppressing the occurrence of a shape defect. An electromagnetic forming device is provided with an electromagnetic coil, and a forming mold which is disposed along the electromagnetic coil and provides an elongate material to be formed with a formed shape. An electromagnetic force generated by means of the electromagnetic coil is caused to act on the material to be formed and the material to be formed is pressed onto the forming mold. In the electromagnetic forming device, the forming mold has a cross sectional shape that varies from one end to another in a longitudinal direction of the material to be formed. The forming mold is formed such that, as the material to be formed is moved parallel to the longitudinal direction, the shape of the material to be formed is gradually changed to a desired shape.

Abstract: A laser device according to an embodiment includes a condensing assembly condensing laser light output from a laser oscillator and a cover for accommodating the condensing assembly, the cover including protection windows permeable to the laser light on an optical path of the laser light. The protection windows include at least one first protection window having a positive refractive index temperature coefficient and at least one second protection window having a negative refractive index temperature coefficient, the first protection window and the second protection window being arranged along the optical path of the laser light.

Abstract: A milling apparatus includes a plurality of milling roller units each including one milling roller that is made contact with, by pressing, one surface of one of a plurality of differently angled plate parts of an elongated metal milling material and another milling roller that is made contact with another surface of the plate part by pressing. At least one of the milling roller units mills a plate part different from a plate part milled by any other milling roller unit. A plurality of the milling roller units configured to mill an identical plate part are installed in a longitudinal direction of the plate part. The one milling roller and the other milling roller of at least one of the milling roller units are movable in axial directions thereof.

Abstract: A bending method feeds a long workpiece material made of metal and having a plurality of thickness portions disposed at different angles between rollers and bends the workpiece material. An initial shape of the workpiece material is a straight line or a bend with a bend radius larger than a target bend radius, a thickness of a cross section of the workpiece material along a bend radius direction is set to increase from an inner side toward an outer side of the bend radius direction, the workpiece material is fed between the rollers and rolled in a way that an amount of rolling in a region corresponding to the outer side of the bend radius direction is larger than an amount of rolling in a region corresponding to the inner side, and the workpiece material is bent to have the target bend radius from the initial shape.

Abstract: For a tapered material having a plate thickness changing in a longitudinal direction to be roll-molded with stability by means of a simple and inexpensive configuration, a roll-molding device includes two parallel roller shafts, fixed rollers concentrically disposed with respect to one of the roller shafts, floating rollers disposed to be capable of being eccentric with clearances with respect to the other one of the roller shafts, facing the fixed rollers, and molding a belt-shaped metallic material pinched between the fixed rollers and themselves, a pressing roller abutting against an outer circumferential portion on the side opposite to points of contact of the floating rollers with the fixed rollers, and actuators pressing the floating rollers toward the fixed rollers via the pressing roller.