JPS6229123Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a multi-roll device for a rolling mill.

Conventionally, shift-type intermediate rolls for multiple mills in rolling mills have a small-diameter shaft neck, and this shaft neck is configured to traverse between the bearings of the roll stand. Oil enters the front of the roll through the gap between this shaft neck and the back-up roll or work roll, adheres to the rolling plate, and remains. As a result, uneven oil burns in the form of yellow spots occur on the surface of the rolled plate, which significantly impairs the appearance of the product.

The object of the present invention is to eliminate the above-mentioned drawbacks and provide an intermediate roll that prevents rolling oil from entering in front of the roll.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

As shown in FIGS. 1 to 3, in the rolling mill of the present invention, for example, in a six-high mill, upper and lower work rolls 1a, 1b are replaced by upper and lower intermediate rolls 2a, 2.
These six rolls are sandwiched between upper and lower back-up rolls 3a and 3b via b, and these six rolls are mounted on a pair of left and right roll stands 4 (indicated by imaginary lines).
A required pressing force is applied to the upper back-up roll 3a. Rolled plate A of each of these roll sets
A rolling oil conduit 5 is installed at the rear in the traveling direction of the rollers, and the inner wall surface 4 of the left and right stands 4 is installed toward the contact surface of each roll.
Rolling oil can be injected over the entire distance between a and 4b. The length along the axial direction of the large diameter portion serving as the acting portion of each of these rolls is the same.

Thus, the upper and lower intermediate rolls 2a and 2b are movable in the axial direction, and are moved to opposite sides in the axial direction according to the width of the plate A to be rolled, so that the end surface of the action part coincides with the end surface of the plate to be rolled. It is installed unevenly. and,
An elastic sleeve 6 lined with rubber, felt, synthetic resin, urethane, or the like is fitted onto the small diameter portion of the shaft neck portions 21 and 22 on the opposite side of the roll. Then, the sleeve 6 is attached to the roll 2
It has at least the same outer diameter as the working parts of a and 2b,
In addition, when the intermediate roll moves to its uneven distribution side, the length is such that it can come into contact with the working portions of the other work rolls 1a, 1b and the backup rolls 3a, 3b, or longer.

In such a structure, the steel plate A to be rolled is inserted and held between the upper and lower work rolls 1a and 1b, as shown in the first diagram, and is gradually rolled through a plurality of rolling roller stands (not shown), and then transferred to the final stand. The wire is pulled out from the winder B, and is wound into a coil by a winder B while being guided by a guide roll C. Rolling oil is injected from behind against the roll set of each stand, but the gaps between the rolls are closed from above, so even if the intermediate rolls 2a and 2b traverse,
Since the gaps between the shaft necks 21, 22 of the intermediate rolls 2a, 2b and the other rolls are sealed by the elastic sleeve 6 within the interval between the opposing stands,
Rolling oil is prevented from entering the front side of the roll from this portion and adhering to the surface of the rolling plate. Moreover,
Since the rolling oil is squeezed out from this part, the rolling oil is particularly well drained. The intermediate roll structure of the present invention is also highly effective when used in the final stand.

Since the present invention is constructed as described above, rolling oil does not remain on the surface of the rolled plate product, and uneven oil burn does not occur on the product, ensuring stable quality.

[Brief explanation of drawings]

Figure 1 is a side view showing one embodiment of the present invention;
The figure is a front view, and FIG. 3 is a cross-sectional view taken from FIG. 2. A... Rolled plate, B... Winder, 1a, 1b... Work roll, 2a, 2b... Intermediate roll, 3a, 3b
... Backup roll, 5... Rolling oil conduit, 6... Sleeve.

Claims (1)

[Scope of utility model registration request] The upper and lower work rolls are pressurized and held between the upper and lower back-up rolls via upper and lower intermediate rolls, and the upper and lower intermediate rolls have their working parts unevenly located on opposite sides in the axial direction depending on the width of the workpiece. the intermediate roll is movable in the axial direction, and has an outer diameter that is at least the same as the outer diameter of the intermediate roll acting part, and when the intermediate roll moves toward the uneven distribution side, at least one other A multi-roll device for a rolling mill, characterized in that an elastic sleeve having a length that can come into contact with the working part of the roll is fitted onto the outside.