Apparatus for positioning a tool with respect to a cylindrical w

Details Apparatus for positioning a tool with respect to a cylindrical w Apparatus for positioning a tool with respect to a cylindrical w

1984-09-28

1987-12-29

Shaw, Clifford C.

Electric heating

Metal heating

By arc

219 60R, 228 29, 266 56, 266 71, B23K 9225

Patent

active

047162716

ABSTRACT:
An apparatus for circumferentially and longitudinally positioning a weld head or other tool with respect to the surface of a pipe. A first annular ring is affixed to the pipe. A longitudinally movable annular indexing track is also circumferentially fitted about the pipe and rides upon a plurality of support rods mounted to the indexing track. The support rods are slidably received within corresponding holes in the clamping ring and extend longitudinally and parallel to the outer surface of the pipe. A motor mounted to the fixed ring drives a ring gear concentric to the fixed ring to reciprocate a ball screw which moves the second longitudinally moveable ring toward and away from the fixed ring. An orbitally moveable third annular ring is circumferentially mounted to the second ring, and a second motor mounted to the fixed ring drives a telescoping drive shaft which rotates the orbital third ring. Thus, a weld head or other tool attached to the third ring is both longitudinally and circumferentially positionable with respect to the surface of the pipe.

REFERENCES:
patent: 2408517 (1946-10-01), Howard
patent: 4007705 (1977-02-01), Sherer et al.
patent: 4051342 (1977-09-01), Stubbings
patent: 4145593 (1979-03-01), Merrick et al.
patent: 4559430 (1985-12-01), Hayakawa

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