Radial cutting tool for cutting thick-walled tubular members

Details Radial cutting tool for cutting thick-walled tubular members Radial cutting tool for cutting thick-walled tubular members

1994-11-16

1995-12-26

Rosenbaum, Mark

Turning

Severing or cut-off

Processes

82 52, B23B 100, B23B 500

Patent

active

054777593

ABSTRACT:
Relatively thick-walled (or solid) tubular members may be cut by a cutting tool which includes an annular frame having a rotatable ring which is adapted to surround the tubular member to be cut. A cutting assembly is radially connected to the rotatable ring of the annular frame so as to be orbitally movable about the tubular member to be cut in response to rotation of said rotable ring. The radial cutting assembly carries a bit subassembly for cutting said tubular member. A drive indexing assembly is provided so as to rotate the rotatable ring (and thereby cause the radial cutting assembly to move orbitally about said tubular member), and indexing the bit radially toward a central longitudinal axis of the tubular member in response to orbital movement of the radial cutting assembly. The bit subassembly includes a cutting bit having a dimension D.sub.1 as measured parallel to said central longitudinal axis, and a planar bit support block radially extending rearwardly of said bit. The bit support block has a dimension D.sub.2 as measured parallel to central longitudinal axis of the tubular member which is less than dimension D.sub.1 of the bit. In In such a manner, a channel passageway is formed between the bit support block and the tubular member being cut as said bit penetrates into the tubular member during the cutting operation such that lubricating/flushing fluid may be directed to the bit.

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