| 摘要 |
The present invention provides a grinding cup (1) having a lower grinding section (2) and an upper body section (3) integrally connected to form a grinding cup having top (4) and bottom (5) surfaces. The grinding section (2) is formed from a material capable of grinding the hard materials such as tungsten carbide inserts of button bits etc. A centrally disposed convex recess (7) is formed in the bottom surface (5) having the desired profile for the button to be ground. One or more passageways (15) in the upper body section (3) and grinding section permit a coolant, preferably water, optionally mixed with cutting oil or a water/air mist, to be provided to the surface of the button (5) during grinding, through outlet(s) on the bottom surface. Drive means (8) are provided on or in the upper body section that cooperate with the output shaft of the grinding machine. Retaining means (11) are provided in conjunction with the drive means (8) to releasably secure the grinding cup (1) to the output shaft of the grinding machine during use. |
