Producing metal rings for cutting hollow cylindrical workpiece from metal by a laser beam, which is applied by a laser beam source into the metal rings, comprises using a side wall of holding element, and cutting the cylindrical workpiece

摘要

The method for producing metal rings for cutting a hollow cylindrical workpiece from metal by a laser beam, which is applied by a laser beam source into the metal rings, comprises using a side wall of a holding element, which serves as a cooling device for cooling the cylindrical workpiece into a through hole of the cylindrical workpiece, forming the cylindrical workpiece in a circular shape by shifting of the side wall of the holding element to an inner wall of the through-hole of the cylindrical workpiece to push the inside wall, and cutting the cylindrical workpiece. The method for producing metal rings for cutting a hollow cylindrical workpiece from metal by a laser beam, which is applied by a laser beam source into the metal rings, comprises using a side wall of a holding element, which serves as a cooling device for cooling the cylindrical workpiece into a through hole of the cylindrical workpiece, forming the cylindrical workpiece in a circular shape by shifting of the side wall of the holding element to an inner wall of the through-hole of the cylindrical workpiece to push the inside wall, and cutting the cylindrical workpiece, which is transformed into the circular shape by the laser beam during a coolant is carried out between the side wall of the holding element and the inner wall of the through-hole of the cylindrical workpiece. The cylindrical workpiece is rotated with a peripheral speed of 30-200 m/min and is intersected by the laser beam, and is formed into a cylindrical shape by welding of two opposite ends of a rectangular metal plate. The coolant is leaked by a cut portion into the step of the cutting of the cylindrical workpiece, and is sucked by a suction unit, and is transfered to the suction unit by a transfer agent, which is delivered by a transfer agent-dispensing unit. The laser beam source is displaced in such a way that the cylindrical workpiece is intersected from downstream after upstream in a direction in which the coolant is supplied. The metal ring is used for a power transmission belt of a continuously variable transmission of a vehicle.