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Patent Searching and Data


Title:
TWO-PAIR ROLLER DEVICES AND ITS OPERATION
Document Type and Number:
Japanese Patent JPH04288995
Kind Code:
A
Abstract:

PURPOSE: To reduce the shearing strain of a shaft material by constituting a pass so that the work partial charge is migrated continuously from one pair to the other pair in connection with an advance, with respect to two pairs of rollers.

CONSTITUTION: A pair of rollers are formed by placing two pairs of rollers 1, 1, 1 and 1 being axially symmetric in the pair so that roller shafts 3, 3, 3 and 3 are twisted and arranged alternately, and share a deformation area in the periphery of a pass line 2. With respect to its pair of rollers, a pass is constituted so that a work partial charge is migrated continuously from one pair to the other pair in connection with an advance. Driving of all the rollers is executed by a reinforcing ring 5 for containing them. A twist angle A of the pair of rollers whose work partial charge is large on the delivery of the pass is made larger in the same direction than a twist angle A of the other pair of rollers. The diameter of the roller is made larger as the work partial charge becomes larger. In such a way, noncoincidence of speeds of the shaft material and the roller can be softened.


Inventors:
YOSHIHARA CHIHARU
Application Number:
JP8188291A
Publication Date:
October 14, 1992
Filing Date:
March 19, 1991
Export Citation:
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Assignee:
YOSHIHARA CHIHARU
International Classes:
B21B1/16; B21B19/02; B29D23/00; B30B3/04; (IPC1-7): B21B1/16; B21B19/02; B29D23/22; B30B3/04
Domestic Patent References:
JPS61119310A1986-06-06