Inside flash bead trimmer apparatus for welded metal pipe having alternately remotely positionable flash bead cutters

Claim 2

Apparatus for trimming a flash bead on the inner surface of a longitudinally welded metal tube which comprises a rigid cantilever support extending longitudinally into said tube from outside one end thereof, an elongated rocker body pivotally mounted intermediate its ends on the inner end of said cantilever support so as to permit relative longitudinal movement between said rocker body and said tube, inner flash bead cutters rigidly mounted one adjacent each end of said rocker body adapted to alternately engage and trim said inner flash bead, a cam longitudinally slidable on said support subjacent said rocker body, said cam being adapted to be moved longitudinally relative to said rocker body and engage the underside thereof selectively on opposite sides of the pivot point of said rocker body to thereby raise said inner flash bead cutters alternately toward and from said inner flash bead, and remotely controlled means for moving said cam.

Claim 3

Apparatus for trimming an inner flash bead on the inner surface of a longitudinally welded metal tube which comprises a support boom having a clevis formed at one end adapted to be rigidly disposed with its clevis end extending longitudinally into said tube from one end thereof, a frame rigidly mounted in said clevis end, an elongated rocker body pivotally monted intermediate its ends iN said frame so as to permit relative longitudinal movement between said rocker body and said tube, flash bead cutter assemblies mounted one adjacent each end of said rocker body each adapted to selectively engage and trim the flash bead on the inner surface of said tube, a cam mounted for longitudinal movement in said frame subjacent said rocker body, said cam being adapted to be moved longitudinally relative to said rocker body to alternately engage the bottom of said rocker body on opposite sides of its pivot connection with said frame to thereby alternately lift said flash bead cutter assemblies into trimming engagement with said flash bead on the inner surface of said tube, and remotely controlled means attached to said frame and connected with said cam for moving the latter longitudinally relative to said rocker body.

Claim 4

Apparatus for trimming an inner flash bead on the inner surface of a longitudinally welded metal tube which comprises a support boom having a clevis formed at one end adapted to be rigidly disposed with its clevis end extending longitudinally into said tube from one end thereof, a frame rigidly mounted in said clevis end, an elongated rocker body pivotally monted intermediate its ends iN said frame so as to permit relative longitudinal movement between said rocker body and said tube, flash bead cutter assemblies mounted one adjacent each end of said rocker body each adapted to selectively engage and trim the flash bead on the inner surface of said tube, a cam mounted for longitudinal movement in said frame subjacent said rocker body, said cam being adapted to be moved longitudinally relative to said rocker body to alternately engage the bottom of said rocker body on opposite sides of its pivot connection with said frame to thereby alternately lift said flash bead cutter assemblies into trimming engagement with said flash bead on the inner surface of said tube, and remotely controlled means attached to said frame and connected with said cam for moving the latter longitudinally relative to said rocker body.

Claim 5

Apparatus as defined by claim 2 in which said means for moving said cam includes a fluid pressure cylinder having a piston rod projecting therefrom, said cylinder being mounted on one end of said frame and said piston rod being connected with said cam.

Claim 6

Apparatus as defined by claim 2 in which a roller is rotatably mounted on said boom adjacent said clevis end thereof for engaging the inner surface of said tube substantially opposite said inner flash bead.

Claim 7

Apparatus as defined by claim 2 in which each of said inner flash bead cutter assemblies comprises a tool holder block being formed with a rounded contour on its upper surface substantially conforming to the curvature of the inner surface of said tube, a cutter blade rigidly mounted in said tool holder block, said cutter blade having a curved cutting end and being disposed in said holder block with its curved cutting end mating with the rounded contour of the upper surface of the holder block, said block having a slot therethrough adjacent the leading edge of the cutting end of the cutter blade for receiving the inner flash bead after it has been cut away from the inner surface of the tube.

Claim 8

Apparatus as defined by claim 5 in which said tool holder block is formed with a notch in its upper surface normal to the trailing edge of the cutting end of said cutter blade for receiving said inner flash bead after the cutting end of said cutter blade becomes worn to a point where it does not engage said inner flash bead.