Work reducing and pressure applying

Details Work reducing and pressure applying Work reducing and pressure applying

B - Operations, Transporting

21

B

80/49

B21B 31/08 (2006.01) B21B 27/02 (2006.01) F16B 33/00 (2006.01)

Patent

CA 1070532

Application to Martin J. Dempsey 3001 Hillcrest Road Bethel Park, Pennsylvania 15102 Title WORK REDUCING AND PRESSURE APPLYING Abstract of the Disclosure Reduction of bars or rods with reducing rolls of large diameter on arbors in which lateral pressure is applied to the reducing rolls to suppress rotation of the rolls relative to the arbor. The pressure is applied by an annular shoe on the arbor. The shoe and an annular fluid activator, on the arbor form, between their facing surfaces, a sealed annular chamber and also an annular gap. The gap is accessible through the peripheries of the activator and shoe. Axial move- ment of the activator outwardly of the rolls is restricted by a nut on the arbor. Grease is injected into the chamber under high pressure. The shoe and activator operate as a split cylinder impressing tensile stress on the arbor between the side of the shoe remote from the activator and the nut and causing the arbor in this region to elongate and also to im- press compressive force on the roll and its axial com- ponents. This elongation enlarges the width of the gap. With the width enlarged, a split annular spacer whose width is greater than the unenlarged width of the gap but smaller than the enlarged width or the gap is interposed in the tap. The grease is then drained causing the arbor to retract and com- press the spacer. The resulting lateral pressure is trans- mitted to the rolls to supress their relative rotation.

303994

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