Method and device for drilling holes into the mantle of a cylinder or equivalent of a paper machine

A device for drilling holes into a mantle of a cylinder of a paper machine while the cylinder is in its site of operation in the paper machine, the cylinder having an axis, said device comprising:

• a drill carriage,
• drill bits mounted on said drill carriage,
• support means for supporting said drill carriage solely on the cylinder to be drilled, said supporting means being structured and arranged such that said drill bits are situated above said cylinder, with respect to the horizontal, to be drilled and such that said drill bits extend in a vertical direction,
• locking means arranged on said drill carriage for locking said drill carriage in a fixed drilling position relative to the cylinder to be drilled, wherein said locking means comprises:
• a belt adapted to pass around said cylinder to be drilled, and
• an actuator for tightening said belt to thereby fix said drill carriage in position relative to said cylinder being drilled;
• and
• drive means arranged in connection with said drill carriage for pressing said drill bits vertically downwardly while simultaneously rotating said drill bits.

A device for drilling holes into a mantle of a cylinder of a paper machine while the cylinder is in its site of operation in the paper machine, the cylinder having an axis, said device comprising:

• a drill carriage;
• drill bits mounted on said drill carriage;
• support means for supporting said drill carriage solely on the cylinder to be drilled, said supporting means comprising a first set of wheels adapted to rest on said cylinder to be drilled;
• locking means arranged on said drill carriage for locking said drill carriage in a fixed drilling position relative to the cylinder to be drilled;
• drive means arranged in connection with said drill carriage for pressing said drill bits vertically downwardly while simultaneously rotating said drill bits;
• and
• an axially extending movement mechanism coupled to said drill carriage for displacing said wheels relative to the cylinder to be drilled.