Abstract: A glass product machining apparatus comprises a grindstone rotatable around an axis by means of a motor, moving table movable under the grindstone in the cross direction of the grindstone, frame for supporting the grindstone for up-and-down motion, lift, guides, supporting arms, pressure cylinder supported on the frame, and dressing machine for dressing or truing the grindstone. The pressure cylinder serves to apply a fixed elastic load to the grindstone as the grindstone shifts its position upward. A glass panel is located on the moving table. The panel moves together with the table. When the panel passes under the grindstone, an outer peripheral surface of the grindstone is brought into contact with the surface of the panel with a fixed force of pressure by the pressure cylinder. The grindstone relatively moves along the curved surface of the panel as it grinds the panel surface.

Abstract: A glass product machining apparatus comprises a grindstone rotatable around an axis by means of a motor, moving table movable under the grindstone in the cross direction of the grindstone, frame for supporting the grindstone for up-and-down motion, lift, guides, supporting arms, pressure cylinder supported on the frame, and dressing machine for dressing or truing the grindstone. The pressure cylinder serves to apply a fixed elastic load to the grindstone as the grindstone shifts its position upward. A glass panel is located on the moving table. The panel moves together with the table. When the panel passes under the grindstone, an outer peripheral surface of the grindstone is brought into contact with the surface of the panel with a fixed force of pressure by the pressure cylinder. The grindstone relatively moves along the curved surface of the panel as it grinds the panel surface.

Abstract: In the present invention, in cutting the top and bottom surfaces of a hot-rolled sheet by the rotation of milling cutters holding the sheet therebetween in the thickness direction of the sheet in the running process of the hot-rolled sheet, the cutting resistance determined by the cutting conditions including the type of hot-rolled sheet, the temperature in cutting, and the cut depth is controlled by the adjustment of cut depth, and cutting is performed by making the tension produced on the hot-rolled sheet by the cutting resistance lower than the breaking strength of the joint portion to prevent the breakage of hot-rolled sheet.

Abstract: In the present invention, in cutting the top and bottom surfaces of a hot-rolled sheet by the rotation of milling cutters holding the sheet therebetween in the thickness direction of the sheet in the running process of the hot-rolled sheet, the cutting resistance determined by the cutting conditions including the type of hot-rolled sheet, the temperature in cutting, and the cut depth is controlled by the adjustment of cut depth, and cutting is performed by making the tension produced on the hot-rolled sheet by the cutting resistance lower than the breaking strength of the joint portion to prevent the breakage of hot-rolled sheet.