Plug mill bottom roll adjustment

Adjustment device for axially aligning a bottom work roll in a plug mill comprising:

• (a) a roll chock supporting said bottom work roll in the plug mill, the roll chock including a pair of laterally extending members each carrying a transverse, tapered wing portion;
• (b) a pair of spaced-apart adjustment assemblies mounted on the mill adjacent a side of the roll chock carrying said laterally extending members, each of said adjustment assemblies including a pair of tapered wedges, engaging a respective transverse, tapered wing portion, each of said adjustment assemblies also including gear means for slideably moving said pairs of wedges and said wing shaped portions;
• each of the adjustment assemblies further including lever arms for moving said gear means;
• and
• (c) a tie rod interconnecting the lever arms of each of the adjustment assemblies, said tie rod comprising two segments having threaded ends interconnected by a turnbuckle whereby selective rotative movement of the turnbuckle causes identical movement of the lever arms and said gear means whereby said gear means moves said pairs of tapered wedges causing movement of the transverse, tapered wing shaped portions of the laterally extending roll chock members and axial movement of the bottom work roll.

Adjustment device for axially aligning a bottom work roll in a plug mill comprising:

• (a) a roll chock supporting said bottom work roll in the plug mill, the roll chock including a pair of laterally extending members, each carrying a transverse, tapered wing portion;
• (b) a pair of spaced-apart adjustment assemblies mounted on the mill adjacent a side of the roll chock carrying said laterally extending members, each of said adjustment assemblies including a pair of tapered wedges, engaging respective transverse, tapered wing portions of the laterally extending roll chock members, each of said adjustment assemblies also including a lever arm, a first pinion gear turnable by said lever arm, a second pinion gear positioned between end portions of the pair of tapered wedges and operably engaging said first pinion gear, rack gears carried by the end portions of each of said pair of tapered wedges operably engaging said second pinion gear;
• and
• (c) a tie rod interconnecting the lever arms of each of the adjustment assemblies, said tie rod comprising two segments having threaded ends interconnected by a turnbuckle, whereby, rotative movement of the turnbuckle causes identical movement of the tie rod segments and lever arms, whereby, the lever arms move the respective first and second pinion gears and the rack gears of said pairs of tapered wedges causing movement of the transverse wing portions of the laterally extending members of the roll chock and selective axial movement of the bottom work roll.

An improved plug mill of the type including a mill housing, a pair of grooved upper and lower work rolls rotatably mounted in respective upper and lower roll chocks, the roll chocks being mounted in said mill housing, the improvement comprising an adjustment device for axially aligning the groove of the bottom work roll with the groove of the top work roll, the adjustment device including:

• (a) a pair of laterally extending members integral with the lower roll chock, the laterally extending members each having a transverse, tapered wing portion;
• (b) a pair of spaced-apart adjustment assemblies mounted on the mill, each of said adjustment assemblies including a pair of tapered wedges, engaging respective transverse, tapered wing portions of the laterally extending members, each of said adjustment assemblies also including gear means for slideably moving said pairs of wedges and said transverse, tapered wing portions, each of the adjustment assemblies further including lever arms for moving said gear means;
• and
• (c) a tie rod interconnecting the lever arms of each of the adjustment assemblies, said tie rod comprising two segments having threaded ends interconnected by a turnbuckle whereby rotative movement of the turnbuckle causes identical movement of the lever arms and said gear means whereby said gear means moves said pairs of tapered wedges causing movement of the transverse, tapered wing portions of the laterally extending members of roll chock and selective axial movement of the bottom work roll.