| 摘要 |
The present invention relates to a blasting apparatus (10) for blasting rock drill bits comprising a blast nozzle (20) for conducting a pressurized blast medium towards a rock drill bit, said nozzle having a direction (L), a fixture (17,21) for the location and rotation of the rock drill bit and a first chamber (14), which surrounds blast nozzle (20) and at least a part of the fixture (21), as well as means (15,23,25) for the forwarding of blast medium. A second chamber (26) is mounted in the first chamber (14). The second chamber (26) is arranged to, at least partially enclose, the fixture (17,21). The second chamber (26) is movable in said direction (L). The second chamber (26) has an opening (31) located between the fixture (17,21) and the blast nozzle (20).
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