| 摘要 |
A pipe lathe is disclosed for performing work on the end of a pipe. An arbor assembly having an arbor shaft is inserted in the end of the pipe. A hub having a frame is positioned on the arbor. An arm from the frame carries a cutter holder. The arm projects over the end of the pipe to position a single point cutter for cutting the outer surface of the pipe. Spiral threads coupled to the arbor shaft engage spiral threads on the hub to move the hub and frame toward or away from the pipe end when the hub is rotated to provide automatic longitudinal progression of the cutter along the outer pipe surface as the hub rotates. Automatic radial progression of the cutter toward or away from the center of the pipe is provided by two sprockets, a chain between the sprockets, and gearing on the cutter holder. One sprocket is located on the arbor shaft and does not rotate in relation to the arbor shaft. The other sprocket is located on the frame. As the hub and frame rotate, the non-rotating sprocket induces rotation in the frame sprocket directly related to the rotation of the hub on the arbor shaft. The rotation of the frame sprocket is transmitted to the cutter holder through suitable gearing to automatically move the cutter radially. A combination of the automatic radial progression and the automatic longitudinal progression of the narrow cutter produces a taper on the end of the pipe.
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