| 摘要 |
PURPOSE:To facilitate discrimination between cutting streaks and a glass member having an exceedingly thin width and reduce the abrasion of a grindstone by feeding a rectangular parallelepiped composite member equipped with the glass member with a certain cutting-in amount in the direction inclined with respect to the direction crossing at right angles with the revolution shaft of a disc-shaped grindstone having a circular outer peripheral part. CONSTITUTION:A glass member 18 having an exceedingly thin width is set at the center of a rectangular parallelepiped composite member 17 and reinforced by glass members 19 and 20 from both sides. When the composite member 17 is fed with a certain cutting amount F with respect to a grindstone 15 in the direction 24 inclined by an angle theta for the direction 23 crossing at right angles to the revolution shaft 16 of the grindstone, the lowest point on the grindstone 15 on the straight line separated by a certain distance (d) in the direction 25 crossing at right angles to the direction 24 is copied onto the composite member 17. If the curvature molding grinding method is applied onto the composite member 17, the longitudinal direction of the glass member 18 having an exceedingly thin width and the direction of cutting streak form a certain angle theta, and therefore, the both can be discriminated very easily, and each point on the surface of the grindstone 15 performs uniform cutting, and generation of local abrasion is prevented.
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