| 摘要 |
A self centering pipe-working machine has a circular frame portion positionable around a pipe section, an openable ring assembly in movable contact with the periphery of the frame portion, two pairs of clamping members attached to the frame portion on a first side thereof, and two pairs of clamping members attached to the frame portion on a second side thereof. Each of the first mentioned two pairs of clamping members are operably interconnected through universal joint means, and each pair of clamping members on the second side of the frame portion are operably connected to a corresponding pair of clamping members on the first side of the frame portion. Threaded means connects each pair of the first mentioned two pairs of clamping members to the universal joint means to provide the combined clamping and self centering adjustments. The other two pairs of clamping members on the other side of the frame correspond in unison to the first two pairs. Adjustable tool support means is removably attached to the openable ring member for rotative movement around a pipe section to be worked. In one embodiment, driving means is attached to the frame with the driving means having a driven wheel in contact with the rotatable ring assembly in order to rotate the tool support means around the pipe section. In another embodiment of the invention, the driving means includes a driven sprocket member in contact with a chain-like member secured to the periphery of the openable ring assembly in order to drive the ring assembly.
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