| 摘要 |
PURPOSE:To permit to remove rust, coating, separatable paint or the like easily from a groove part by a method wherein a synthetic fiber brush, having abrasive grains, is formed into a disc shape and is driven by a motor while the ends of plates to be welded are ground by abutting the circumferential surface of the brush. CONSTITUTION:The shaft 16 of the motor 15 is inserted through the hole 11 of the disc brush 10 and is secured thereto while the switch of the motor 15 is put ON to rotate the disc brush 10 and the circumferential surface 17 of the brush 10 is abutted against the groove parts 1a, 2a of the steel plates. The circumferential surface 17 of the disc brush 10 grinds the groove parts 1a, 2a under being rotated while the same is deformed gradually so as to be intimated with the sectional shape between the groove parts 1a, 2a and grinds the details of both end parts. Nylon or the like is used as the material of the disc brush 10, therefore, the deformation may be effected in a short period of time. The disc brush 10 removes efficiently the rust, coatings, or the separatable paint on both groove parts to be welded only, and the same 10 will never grind the metallic parts of both ends. |
