Plate-end processing method and blasting device

摘要

A plate-end processing method comprises the steps of disposing a slit nozzle having a slit-shaped opening at a nozzle tip such that a longitudinal direction of the opening extends along a longitudinal direction of an edge formed along an end of a plate, and such that a distance between the tip of the nozzle and an apex of the edge is equal to 3 mm or smaller, and ejecting an abrasive with a median diameter smaller than or equal to 20 μm with an ejection pressure of 0.1 MPa to 0.5 MPa to the edge via the nozzle and collecting the ejected abrasive and the abrasive and cut dusts adhered to the plate by suctioning the ejected abrasive, the adhered abrasive and cut dusts from a front side of an ejecting direction of the abrasive at an average flow rate of 30 m/s or higher.

主权项

1. A plate-end processing method comprising:
disposing a slit nozzle having a slit-shaped opening at a nozzle tip such that an angle formed by a line extending an axis of the slit nozzle and a flat surface of a plate is between 45° and 85° and a longitudinal direction of the slit-shaped opening extends along a longitudinal direction of an edge to be processed, formed along an end of the plate, and such that a distance between the tip of the slit nozzle and an apex of the edge is smaller than or equal to 3 mm, and ejecting an abrasive with a median diameter smaller than or equal to 20 μm with an ejection pressure of 0.1 MPa to 0.5 MPa to the edge via the slit nozzle; and collecting the ejected abrasive and the abrasive and cut dusts adhered to the plate by suctioning the ejected abrasive, the adhered abrasive, and the adhered cut dusts by suction means at an average flow velocity of 30 m/s or higher from an inlet of the suction means, the inlet of the suction means being located on an extension of the axis of the slit nozzle so that a distance from the opening of the slit nozzle to an opening surface of the inlet of the suction means is set between 10 mm and 50 mm, and the opening surface of the inlet of the suction means is arranged so as to be opposite in parallel with an opening surface of the slit nozzle via the edge.