Manufacturing method for rolled sheet products

Abstract

To provide a manufacturing method of a wound-plate product which can wind a tabular blank to make it a wound-plate product with a cross-sectional shape having high roundness.SOLUTION: A manufacturing method of a wound-plate product comprises: rotating an urethane roll 3 and a steel roll 5 while pressing the steel roll 5 against the urethane roll 3; and causing a blank 1 to pass through between the rotating urethane roll 3 and the rotating steel roll 5 to wind the blank 1 into a cylindrical shape. The method is characterized in causing the blank 1 and the dummy blank 7 to pass through between the urethane roll 3 and the steel roll 5 in a state where a tabular dummy blank 7 is overlapped with a surface of the blank 1 at the urethane roll 3 side at least in a tip part and a rear end part thereof and where a part of the dummy blank 7 protrudes from the tip part and the rear end part of the blank 1 toward a plate winding direction.SELECTED DRAWING: Figure 1

Claims

1. A method for manufacturing a rolled sheet metal product, comprising pressing a steel roll against a urethane roll, rotating the urethane roll and the steel roll, and passing a plate-shaped blank between the rotating urethane roll and the steel roll to roll the blank into a cylindrical shape, A method for manufacturing a rolled sheet metal product, characterized by placing a dummy blank made of a metal plate on the surface of the blank facing the urethane roll at least at the leading and trailing ends, and passing the blank and the dummy blank between the urethane roll and the steel roll with a portion of the dummy blank protruding from the leading and trailing ends of the blank in the roll-winding direction.

2. The method for manufacturing a rolled metal product according to claim 1, characterized in that the dummy blank is a single metal plate that extends continuously from the leading end to the trailing end.

3. The method for manufacturing a rolled sheet metal product according to claim 1, characterized in that the dummy blank consists of two metal plates: a front-end dummy blank positioned on the front end of the blank and a rear-end dummy blank positioned on the rear end of the blank.

4. When the target diameter of the cylinder to be machined is D, The method for manufacturing a rolled sheet metal product according to claim 3, characterized in that the overlap length in the sheet metal feeding direction between the leading edge of the blank and the leading edge dummy blank, and between the rear end of the blank and the rear end dummy blank, is D / 4 or more.

5. When the target diameter of the cylinder to be machined is D, A method for manufacturing a rolled sheet product according to any one of claims 1 to 4, characterized in that the protruding lengths from the leading and trailing ends of the dummy blank are each D / 4 or more.

Images