| 摘要 |
PURPOSE:To grind the object to be ground uniformly and smoothly by arranging a group of segment grinders specifically, forming a plurality of grooves in a specific shape, and thereby eliminating deterioration in the abrasiveness. CONSTITUTION:When a lapping surface board rotates in the direction of Arrow B, an object to be ground 4 in pressure contact with a certain number of segment grinders 1, 1'... is scraped by these segment grinders 1, 1'... in gliding on the surface thereof, to which now a force in the direction of Arrow A is applied. Wastes exhausted during this grinding, such as separated abrasive grains, splash, water etc., which are oriented by the force as in the direction A, are led in the opposite direction to proceeding of the surface board constituted of said segment grinders, outward from inside the surface board, and sent to outside the lapping surface board smoothly and continuously through a plurality of snail-shaped grooves 5, 5' in communication to outside the surface board. |
