Provided is a ring-rolled member manufacturing method enabling stabilization of the attitude of the ring material without generating a defect and the like in the resulting ring-rolled member even when the main roll of the ring-rolling device is provided with the flange portions positioned on upper and lower sides of the ring material. A ring-rolling device used in the ring-rolled member manufacturing method of the present invention is provided with a main roll 10 and a mandrel roll 20. An outer peripheral face of the main roll includes a recessed portion 12 to accommodate the ring material and an outer peripheral face of the mandrel roll 20, an upper flange portion 11 positioned on an upper side thereof, and a lower flange portion 13 positioned on a lower side thereof. An inner face of the recessed portion includes a rolling face 12S to be in contact with an outer peripheral face of the ring material, an upper face on the upper flange portion side, and a lower face 13S on the lower flange portion side, the lower face 13S having a slope in such a way that an opening of the recessed portion 12 is enlarged. The slope starts from within a range of a distance corresponding to a thickness of the ring-rolled member from a line of intersection between the lower face 13S and the rolling face 12S. An angle of the slope is greater than 0.3° and no greater than 9° with reference to the perpendicular plane.

Provided is a ring-rolled member manufacturing method enabling stabilization of the attitude of the ring material without generating a defect and the like in the resulting ring-rolled member even when the main roll of the ring-rolling device is provided with the flange portions positioned on upper and lower sides of the ring material. A ring-rolling device used in the ring-rolled member manufacturing method of the present invention is provided with a main roll 10 and a mandrel roll 20. An outer peripheral face of the main roll includes a recessed portion 12 to accommodate the ring material and an outer peripheral face of the mandrel roll 20, an upper flange portion 11 positioned on an upper side thereof, and a lower flange portion 13 positioned on a lower side thereof. An inner face of the recessed portion includes a rolling face 12S to be in contact with an outer peripheral face of the ring material, an upper face on the upper flange portion side, and a lower face 13S on the lower flange portion side, the lower face 13S having a slope in such a way that an opening of the recessed portion 12 is enlarged. The slope starts from within a range of a distance corresponding to a thickness of the ring-rolled member from a line of intersection between the lower face 13S and the rolling face 12S. An angle of the slope is greater than 0.3° and no greater than 9° with reference to the perpendicular plane.

A system includes a plurality of forming roller sets comprising an inner forming roller and an outer forming roller, each inner forming roller rotatable about an inner forming roller axis, each outer forming roller rotatable about an outer forming roller axis, each forming roller set being adjustable between an engagement configuration and a disengagement configuration, each forming roller set forming a profile on the ring component based on a forming roller set profile of the forming roller set, the system also including an actuating unit which controls the engagement and a disengagement of the forming roller sets with the ring component.

A system includes a plurality of forming roller sets comprising an inner forming roller and an outer forming roller, each inner forming roller rotatable about an inner forming roller axis, each outer forming roller rotatable about an outer forming roller axis, each forming roller set being adjustable between an engagement configuration and a disengagement configuration, each forming roller set forming a profile on the ring component based on a forming roller set profile of the forming roller set, the system also including an actuating unit which controls the engagement and a disengagement of the forming roller sets with the ring component.

A device (1) for rolling rings, comprising: a rolling device (10) with a main roll (11) and at least one mandrel roll (13a) onto which a ring is loadable, wherein the rolling device (10) is designed to roll the ring, with the mandrel roll (13a) impacting an interior face of the ring and the main roll (11) impacting an exterior face of the ring ;and a manipulator (20) comprising at least one robot (21) designed to manipulate the ring, comprising loading the ring onto the mandrel roll (13a) and/or unloading the ring from the mandrel roll (13a).

A method for forming a QCr0.8 alloy tapered cylindrical ring, including: heating a standard QCr0.8 alloy cylindrical part followed by upsetting and stretching at least twice to obtain a primary blank; heating the primary blank followed by upsetting and chamfering to obtain a secondary blank, where a diameter of a top end is greater than that of a bottom end; subjecting the secondary blank to backward extrusion to form a preform; machining the preform to remove a flash and a bottom residue; subjecting a bottom end of the preform to local bulging to enable a shape and a size thereof to match that of a drive roller in a forming tooling, so as to form a profiled ring blank; and rolling the profiled ring blank by a radial-axial ring rolling machine with the forming tooling to form the tapered cylindrical ring.

In a multi-roll table ring-rolling mill and method, a mandrel roll can be switched from a rolling state into a free-running state, when a predetermined ring diameter is reached, even if the roll gap minimum has not yet been reached, in order to improve the size accuracy of the rolled rings. A mandrel roll table rotating about a mandrel table axle is used, along with at least one main roll rotating about a main roll axle and first and second mandrel rolls that are mounted in the mandrel roll table, and a relief device to relieve at least the first mandrel roll of rolling forces. The main roll axle and the mandrel roll table axle are mounted in unchangeable manner and eccentric to one another, at least during the rolling process. The relief device acts independent of the main roll axle and the mandrel roll table axle are eccentric to one another.

In a multi-roll table ring-rolling mill and method, a mandrel roll can be switched from a rolling state into a free-running state, when a predetermined ring diameter is reached, even if the roll gap minimum has not yet been reached, in order to improve the size accuracy of the rolled rings. A mandrel roll table rotating about a mandrel table axle is used, along with at least one main roll rotating about a main roll axle and first and second mandrel rolls that are mounted in the mandrel roll table, and a relief device to relieve at least the first mandrel roll of rolling forces. The main roll axle and the mandrel roll table axle are mounted in unchangeable manner and eccentric to one another, at least during the rolling process. The relief device acts independent of the main roll axle and the mandrel roll table axle are eccentric to one another.

A ring molded article manufacturing method capable of reliably and efficiently producing a ring molded article in which dead metal regions are reduced, and a ring material used for producing the ring molded article, are provided. The present invention relates to the method for manufacturing a ring molded article having two convex portions which respectively protrude on both sides of the ring molded article in a direction of a center axis thereof and extend in a direction of a circumference of the ring molded article. In the manufacturing method, the ring material is placed inside two molds on which concave portions respectively corresponding to the convex portions are formed, in a condition in which the ring material is supported by a region on an outer peripheral side from an outer peripheral side corner in the concave portion of one of the two molds and a region on an inner peripheral side from an inner peripheral side corner in the concave portion of another of the two molds, the ring material is then forged so as to be pressed by the two molds in a direction of a center axis of the ring material, and the ring molded article is thus produced. In addition, the present invention relates to the ring material used for producing the ring molded article.

A ring molded article manufacturing method capable of reliably and efficiently producing a ring molded article in which dead metal regions are reduced, and a ring material used for producing the ring molded article, are provided. The present invention relates to the method for manufacturing a ring molded article having two convex portions which respectively protrude on both sides of the ring molded article in a direction of a center axis thereof and extend in a direction of a circumference of the ring molded article. In the manufacturing method, the ring material is placed inside two molds on which concave portions respectively corresponding to the convex portions are formed, in a condition in which the ring material is supported by a region on an outer peripheral side from an outer peripheral side corner in the concave portion of one of the two molds and a region on an inner peripheral side from an inner peripheral side corner in the concave portion of another of the two molds, the ring material is then forged so as to be pressed by the two molds in a direction of a center axis of the ring material, and the ring molded article is thus produced. In addition, the present invention relates to the ring material used for producing the ring molded article.