Method and device for drilling of holes into a mantle of a cylinder in a paper machine

A device for drilling holes into a mantle of a cylinder in a paper machine, comprising

• a base frame,
• a drilling machine mounted on said base frame and comprising a spindle box having a plurality of drill bits, each of said drill bits comprising a displaceable slide frame,
• first drive means for rotating said drill bits,
• second drive means for displacing said spindle box relative to said base frame so as to produce a feed movement for said drill bits when said drill bits are moved toward a mantle face of a cylinder to be machined,
• said spindle box further comprising
• rotatable drill shafts connected to each of said slide frames and to said drill bits,
• drive pulleys connected to said drill shafts for rotating said drill shafts, said drive pulleys being rotated by said first drive means to thereby cause said drill bits to rotate,
• bearing means for journallying said drill shafts such that said drill shafts revolve relative to said slide frames,
• coupling means arranged between said spindle box and said slide frames, said coupling means structured and arranged to lock each of said slide frames in a desired horizontal position when said cylinder is being machined,
• an adjusting rod passing centrally through said drill shaft, a desired stroke length of said drill bit being determined by adjusting the position of said rod,
• a rotatable screw located at one end of said adjusting rod, said adjusting rod being displaced by rotating said screw, said adjusting rod being rotated by means of threading between said adjusting rod and said drill shaft, and
• a locking wheel arranged to rotate on external threading on an end of said adjusting rod, said adjusting rod being locked in a desired position by rotating said locking wheel.

A device for drilling holes into a mantle of a cylinder in a paper machine, comprising

• a base frame,
• a drilling machine mounted on said base frame and comprising a spindle box having a plurality of drill bits and first drive means, each of said drill bits comprising a first displaceable slide frame, said drill bits structured and arranged to be rotated by said first drive means, said first drive means comprising a belt drive, said spindle box comprising second drive means structured and arranged to displace said spindle box relative to said base frame so as to produce a feed movement for said drill bits when said drill bits are moved toward a mantle face of a cylinder to be machined,
• said spindle box further comprising
• rotatable drill shafts connected to each of said first slide frames and to said drill bits,
• drive pulleys connected to said drill shafts for rotating said drill shafts, said drive pulleys being rotated simultaneously by said belt drive,
• bearing means for journalling said drill shafts such that said drill shafts revolves relative to said first slide frames,
• coupling means arranged between said spindle box and said first slide frames, said coupling means structured and arranged to lock each of said first slide frames in a desired horizontal position when said cylinder is being machined,
• tensioning and guide pulleys arranged to guide said drive belt in said spindle box,
• second slide frames on which said guide pulleys are situated, and
• means to move said second slide frames in horizontal and vertical directions such that said guide pulleys are moved to a desired horizontal and vertical position relative to said spindle box.