| 摘要 |
This invention relates to a grinding appliance for grinding of button drill bits which comprise a drilling head with a plurality of buttons, and a method for manufacturing such a grinding appliance. The grinding appliance comprises a first element provided with an abrasive facing comprising diamonds as the abrasive medium and adapted to grinding a button to an intended end profile shape, and a second element adapted to grinding the drilling head. At least one section of the second element is provided with an abrasive facing comprising diamonds as the abrasive medium, the average grain size for the diamonds in the second abrasive facing being of a different average grain size from those in the first abrasive facing. |
