Forging system for forging a valve

摘要

A forging press device for valve including an upsetter in which a plurality of primary forming stages are provided, a forging press main body adjacent to the upsetter, that secondarily forms a primary formed workpiece, and a workpiece conveyance/carry-in device which grips and conveys the workpiece, to carry it into the forging press main body, the device in which the workpiece conveyance/carry-in device is composed of a high speed multi jointed robot capable of circling around a vertical shaft, which has an arm (a chuck) gripping the workpiece. In accordance with the invention, it is possible to provide a forging press device for valve in which the number of deliveries of workpiece from the upsetter to the forging press main body is decreased, which speeds up a valve forging line, and improves the production efficiency.

主权项

1. A forging system for forging a valve, comprising:
at least one upsetter comprising a forming stage provided at a front surface thereof, the forming stage comprising an electrode, a pair of electrode chucks, and a pressurizing device mounted on the front surface, the pair of electrode chucks gripping a round bar material, an electric current being provided between the electrode and a first end of the round bar material, and the round bar material being pressurized by the pressurizing device from a second end of the round bar material, thereby forming a primary formed workpiece having the first end thereof bulged into a ball shape; a workpiece feed/carry-out device which is installed on the front surface side of the upsetter, that feeds the round bar material to the forming stage and carries the primary formed workpiece out from the forming stage; a forging press main body which is disposed adjacent laterally to the upsetter, the forging press main body receiving the primary formed workpiece formed in the upsetter and forming a secondary formed workpiece with upper and lower metallic molds; a primary formed workpiece conveyance/carry-in device which is disposed in the vicinity of the upsetter and the forging press main body, that grips and conveys the primary formed workpiece formed in the upsetter, to carry the primary formed workpiece from the workpiece feed/carry-out device into the forging press main body; and a round bar material feed device which is disposed adjacent laterally on the opposite side of the upsetter relative to the forging press main body, wherein the workpiece feed/carry-out device includes a workpiece discharging chuck and a workpiece feeding chuck which integrally slide in a horizontal direction with respect to the upsetter, and respectively slide independently in a front-back direction of approaching and departing from the upsetter, wherein the primary formed workpiece conveyance/carry-in device is composed of a high speed multi jointed robot having an arm and a vertical rotary spindle, the arm being capable of circling around the vertical rotary spindle, the arm gripping the primary formed workpiece on the front surface side of the upsetter with a chuck provided at a tip end of the arm, and wherein the high speed multi jointed robot receives the round bar material on a bar material feeding route of the round bar material feed device, to deliver the round bar material to the workpiece feeding chuck of the workpiece feed/carry-out device, and receives the primary formed workpiece from the workpiece discharging chuck of the workpiece feed/carry-out device, to convey/carry the primary formed workpiece into the forging press main body.