| 摘要 |
<p>The present invention relates to a grinding cup (10; 10'; 10') that is intended to be mounted in a grinding machine. The grinding cup (10; 10'; 10') carries out grinding of buttons of a rock drilling bit. The grinding cup (10; 10'; 10') includes a shrank (11), flush channels (18, 25) and a wear part (12; 12'; 12'). The wear part (12; 12'; 12') has a cavity (15) carrying out the grinding of the button (16), wherein a second flush channel (25) at least partly terminates in the cavity. The grinding cup has a center axis (14). A space (23; 23'; 23') is provided between a first (18) and the second flush channel (25), said space having a larger radial extension than the second flush channel and the second flush channel (25) is displaced in the radial direction relative to the center axis (14). The cavity (15) has a radially outermost border line (L), and the radially innermost part (26) of the second flush channel (25) is radially separated a distance (S) from the center axis (14). The distance (S) is larger than 2 % of the largest diameter (D) of the cavity (15).</p> |
