Turning – Severing or cut-off – Cutting couple straddling work
Patent
1994-12-22
1997-02-18
Rachuba, M.
Turning
Severing or cut-off
Cutting couple straddling work
82 61, 82113, B23B 514
Patent
active
056032501
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 pair of cutting assemblies are 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 rotatable ring. The radial cutting assemblies carry a bit subassembly (preferably a pair of generally radially opposed cutting assemblies) for cutting said tubular member. A drive/indexing assembly is provided so as to rotate the rotatable ring (and thereby cause the radial cutting assemblies 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 indexing assembly is operatively coupled to each cutting assembly for moving the bits toward the tubular member to be cut, and includes a stationary gear, an indexing pinion gear, a gear box with output shafts, and a pair of linkage shafts interconnected with resective output shafts, for moving each bit simultaneously toward the tubular member.
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Hansen Kenneth J.
Rachuba M.
Wellcutter Inc.
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