| 摘要 |
PURPOSE:To obtain the title device for improving the glass film characteristic and iron loss characteristic by inclining the rotating shaft of a surface roughening rotary device formed by providing hard brushes on the circumference of a rotor at intervals to the passing direction of the oriented magnetic steel sheet. CONSTITUTION:The oriented magnetic steel sheet 1 is passed by a roller 2 in the direction as shown by the arrow. In this case, fine ruggednesses and partial deeper ruggednesses are formed on the rotary device 3 for roughening the steel sheet surface. Namely, the brush 5 such as a metallic brush on a resin brush is formed on the circumference of the rotor 4 in the device 3, and an abrasive of diamond, SiC, etc., is further welded to or embedded in the brush 5 to form the hard brushes 6 at regular intervals in the axial or circumferential direction. In addition, the angle theta between the rotating shaft of the device 3 and the passing direction of the steel sheet 1 before annealing is controlled within + or -30 deg. away from the orthogonal direction. Accordingly, when the rotor 4 of the device 3 is rotated, the ruggednesses having 0.5-1.0mum thickness, for example, are formed on the whole surface of the steel sheet 1, and the deeper ruggednesses 7 can be partially formed. |
