Diver-Controlled Underwater Linear Milling Machine.
DEPARTMENT OF THE NAVY WASHINGTON DC
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A linear milling machine adapted to be carried and controlled by a diver mounts a hog mill cutter on a frame which itself is secured to the work preferably by a hold-down suction cup arrangement. A driven feed-screw advances the cutter relative to the work. Hydraulic motors drive the cutter and the feed screw as well as a pump used to establish the hold-down power. The suction motor and pump are mounted in a separate oil-filled and pressure-compensated casing. Another small and portable casing provides diver-controlled hydraulic flow regulation for the cutter motor, the feed screw drive and the suction pump motor. By controlling the drive speeds, cuts can be made utilizing only the suction grippers to firmly hold the frame to the work. At the end of each cut, the cutter is manually returned and the suction released to permit the frame to be quickly repositioned and secured for another continuation cut. Author
- Machinery and Tools
- Submarine Engineering