To unify the thickness distribution, to improve the workability and productivity, and to prevent the torsional deformation or the corrugated deformation of a plate, i.e., to prevent the edge drop.
A plurality of pairs of rolling rolls 20, 30, 40 having approximately columnar roll bodies 21, 31, 41 are provided, at least one projecting part 22, 32, 42 to be respectively extended approximately over the whole circumference and projected from the roll bodies 20, 30, 40 are formed on at least one of the rolling rolls 20, 30, 40, arcshaped surfaces 22a, 32a, 42a of revolution approximately around the axis of revolution of the rolling rolls are formed on the projecting parts, the radius of curvature of the projecting parts 22, 32, 42 formed on the rolling roll of each stage is set to be gradually larger toward the downstream stage in the moving direction of a plate A, and a thick plate part of dissimilar sectioned bar B is rolled by at least a part of the roll body while a thin plate part of the dissimilar sectioned bar B is rolled between the projecting part of the rolling roll and other rolling roll.
| JP2000034506 | POWDER ROLLING MILL |
| JP2003211245 | METHOD FOR MANUFACTURING GROOVED HEAT TRANSFER TUBE |
INUI KENICHI
OBA MAKOTO
HAGIWARA NOBORU
