Wean United, Inc.

Harry Calhoon Ledebur

Charles Leroy Miller

Floyd William Diehl, Jr

Disclosed is a vertical stand of a sizing mill for rolling seamless tube in which each roll of the mill is contained in and supported by a yoke moveable both transversely of the product passline and axially of the roll axis, the latter adjustment being performed by an elevator arranged normally at the bottom of the mill for moving both yokes as a unit with their rolls, i.e. a yoke-roll set, through the top of the stand to a roll changing position where both yokes are transferred as a unit to one of two in-lined arranged side shifting carriages supported by the stand, the arrangement being such that when a used yoke-roll set is moved away from the stand at the top thereof by one of the carriages a replacement yoke-roll set is positioned above the stand of the other carriage in readiness to be received and lowered into the stand by the elevator.

Apparatus for changing rolls in vertical rolling mills

The disclosure of the present invention relates to a torque and mass compensating counterweight system employed with the drive of a cold pilger rolling mill. The counterweight is connected directly to the crank by a sliding block, displaceable in a slot provided in the counterweight, in which the counterweight is arranged to reciprocate 90.degree. out of phase with the crank and is arranged in guides to move in a plane parallel to the direction of movement of the mill.

Crank drive system for cold pilger mills drive or the like

A system for incremently and continuously feeding tubes between dies during a prescribed angle of rotation of a crank assembly in a cold pilger mill. As a main motor drives the crank assembly, a servo-motor, receiving a signal from a digital control unit, which receives a signal from a pulsating encoder associated with the main drive, operates to incremently advance a carriage and shell a controlled predetermined distance between the dies. A reversal of the servo-motor returns the carriage to the initial position in preparation to advance another shell.

Shell feed system for a cold pilger mill

Tractive apparatus for longitudinally moving elongated material providing opposed tractive assemblies for gripping material therebetween by opposed and balanced gripping forces. Each tractive assembly provides a plurality of tractive members in end-to-end relation confined to circulation in a closed path and the apparatus is characterized by the provision of means for holding the tractive members in abutting relationship at least during the time they grip the material. The apparatus is further characterized by the reduction of frictional forces on the tractive members by forcing the latter against the elongated material by sets of rolling bodies, each set of which circulates in a closed path within a respective tractive member path. Each tractive member has a material gripping face and each face is maintained in assembled relation with its tractive member by magnetic attraction to provide for ready removal and replacement of such faces.

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Canfield, OH, United States of America

Harry Calhoon Ledebur