Gear cutting – milling – or planing – Milling – Process
Patent
1994-07-29
1997-01-28
Pirlot, David L.
Gear cutting, milling, or planing
Milling
Process
409143, 409179, 408150, B23C 334
Patent
active
055972764
ABSTRACT:
An apparatus is provided to allow a conventional tube grooving tool to be used to create a vent hole in a tube behind the tube sheet of a boiler or other tubular heat exchanger without cutting a hole or grove in the entire circumference of the tube. The apparatus includes an eccentric or a canted guide that is positioned within the end of the tube to guide the tool holder having a grove cutting tool mounted on it. The guide offsets the tool holder and the cutting tool from the centerline of the tube so that the cutting tool only cuts into a portion of the inside surface of the tube.
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Pirlot David L.
Wittels Daniel
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