JPS6229126Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rolling mill that can produce plates with good shapes.

When rolling a plate, especially when cold rolling an extremely thin plate, the problem of fine localized elongation at the edge of the plate due to roll flattening can be solved by providing a tapered part at the end of the work roll. This problem can be solved by rolling the surface of the work roll so that it is released suddenly.
For this reason, a rolling mill has been developed in which tapered portions are provided at the ends of the upper and lower work rolls, and the sheet ends are positioned at the tapered portions for rolling. By moving only the work roll in the axial direction while leaving the roll behind, the position of the work roll relative to the plate can be adjusted and changes in plate width can be dealt with.The back-up roll is designed to improve the plate shape. The designed work roll edges have the disadvantage of high contact stresses and scratches.

The present invention was developed to solve this drawback, and is a rolling mill having upper and lower work rolls and upper and lower back-up rolls, in which the work rolls and back-up rolls that are in contact with each other are integrally moved in the same axial direction. The invention is characterized in that it is configured to allow

Embodiments of the present invention will be described below with reference to the drawings.

1 is the upper work roll, 2 is the lower work roll, 3
4 indicates the upper back up roll, 4 indicates the lower back up roll, and the upper work roll 1 has a tapered part 6 at the end on the side where one end of the plate 5 is rolled, for example, at the left end.
has been established. Further, the lower work roll 2 is provided with a tapered portion 7 at the end on the side where the other end of the plate 5 is rolled, for example, at the right end. With one roll end 8 of the upper back up roll 3 aligned with the shoulder 9 of the upper work roll 1, the upper work roll 1 and the upper back up roll 3 are integrated by a drive device (not shown) such as a hydraulic cylinder. The lower work roll 2 and the lower back up roll 4 are moved in the same axial direction, and with one roll end 10 of the lower back up roll 4 aligned with the shoulder 11 of the lower work roll 2, the lower work roll 2 and the lower back up roll 4 are It allows them to move integrally in the same axial direction. The shoulders 9 and 11 of the upper and lower work rolls are designed to release the roll surface rapidly.
It is formed into a curved surface with a small radius. The roll ends 8, 10 of the upper and lower back-up rolls are formed into curved surfaces with a large radius in order to reduce the contact surface pressure with the upper and lower work rolls 1, 2 and eliminate the risk of spalling.

In the figure, 12 is a rolling mill center, and 13 is an axle box.

In the above, the upper and lower work rolls 1 and 2 have a board width W
With respect to plate 5, the roll surface is in a state where it suddenly escapes at the edge of the plate, and the plate can be rolled without local elongation at the edge.
When trying to change from to W', move both upper work roll 1 and upper back-up roll 3 to the left side in the figure, and move both lower work roll 2 and lower back-up roll 4 to the right side in the figure. Adjust the position of the work roll and back-up roll relative to the board.

In this way, in the present invention, since the work roll and the back-up roll that are in contact with each other are moved integrally, the back-up roll is prevented from being damaged by the end of the work roll, and therefore roll marks and localized It is possible to produce boards with excellent shapes without edge elongation.

[Brief explanation of the drawing]

The figure is a front view showing an example of the present invention. 1...Upper work roll, 2...Lower work roll, 3
...Upper back-up roll, 4...Lower back-up roll, 5...Plate, 6, 7...Tapered portion.

Claims (1)

[Scope of utility model registration request] 1. A rolling mill having upper and lower work rolls and upper and lower back-up rolls, characterized in that the work rolls and back-up rolls that are in contact with each other are moved integrally in the same axial direction.