JPH0440087B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll shifting method and apparatus for a 6Hi type roller leveler.

Conventionally, as shown in FIGS. 1A and 1B, a plurality of leveling rolls 2 are arranged so as to alternately sandwich the strip 1 from the upper and lower surfaces thereof, and in order to give an arbitrary pressure distribution to the leveling rolls 2, the leveling rolls 2 A so-called 6Hi type roller leveler is known in which the roller leveler is supported by a back-up roll 4 having a variable pushing force via an intermediate roll 3.

However, since these roller levelers are provided with a back-up roll 4, roll abrasion and roll marks occur on the intermediate roll 3, and furthermore, this roll abrasion passes through the leveling roll 2 to the strip 1. This caused deterioration of product quality.

Conventionally, when such roll wear occurred on the intermediate roll 3, it was frequently replaced with a new roll and the old roll was polished in the meantime.
Not only is it troublesome to replace the rolls, but the entire roller leveler must be stopped when replacing the rolls, resulting in a low operating rate. Furthermore, it is economically disadvantageous because it requires a large number of spare rolls.

In view of these circumstances, the present invention has been made to provide a roller leveler that prevents roll wear caused by back-up rolls from being transferred to the product by shifting the intermediate rolls in the axial direction at appropriate intervals. .

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

FIG. 2 shows an embodiment of the present invention, and is a view corresponding to the - arrow view in FIG. 1A.

A wedge mechanism 15 is provided between the axle box 5 supporting the back-up roll 4 and the top frame 6, so that the back-up roll 4 can be pressed against the leveling roll 2 via the intermediate roll 3. A guide 8 in the axial direction is fixed to the axle box 7,
A rod end of an elevating cylinder 9 installed on the top frame 6 is slidably engaged with the guide 8, and a guide 11 in the axial direction is similarly fixed to the axle box 10 of the leveling roll 2. 11 is slidably engaged with the rod end of an elevating cylinder 12 installed on the top frame 6, and each of the axle boxes 7, 10
Shift cylinder 13,1 installed in the housing
Connect 4.

With such a configuration, if a slight wear or the like occurs on the intermediate roll 3, the leveling roll 2 is lowered and separated from the intermediate roll 3 by extending the cylinder 12 (see Fig. 3), and in this state, the leveling roll 2 is lowered and separated from the intermediate roll 3. By expanding and contracting the shift cylinder 13, the intermediate roll 3 is shifted in the axial direction, thereby appropriately shifting the relative positions of the intermediate roll 3, the leveling roll 2, and the back-up roll 4. At this time, as shown in FIG.
It is also possible to lower the cylinder 9 by operating the cylinder 9 and shift it further away from the backup roll 4. In addition, when the intermediate roll 3 is shifted, the axle box 7
The guide 8 and the rod end of the cylinder 9 slide. Thereafter, the cylinder 12 is contracted to return the leveling roll 2 to its original position.

By performing such operations appropriately for each pass, roll wear that occurs on the intermediate roll 3 can be uniformly distributed in the axial direction, thereby extending the life of the intermediate roll 3 and even the leveling roll 2, and reducing the need for roll replacement. In addition, the product quality can be improved.

In addition, in the above, the leveling roll two-shaft box 1
0 is also provided with a guide 11 that can slide on the rod end of the lifting cylinder 12, so by expanding and contracting the cylinder 14, the leveling roll 2 may be shifted in the opposite direction to the intermediate roll 3.

FIG. 5 shows another embodiment of the present invention, in which the axis of the back-up roll 4 is supported by a cylinder 16 provided on the top frame 6, and the cylinder 16 moves the back-up roll 4 through the intermediate roll 3. In the roller leveler that can be pressed against the leveling roll 2, the shaft box 3 of the intermediate roll 3
A shift cylinder 13 is connected to the shift cylinder 13.

In the case of this method, the shift cylinder 13 is moved while the cylinder 16 is contracted and the backup roll 4 is separated from the intermediate roll 3 (see FIG. 6).
The intermediate roll 3 is shifted in the axial direction. Of course, similarly to the embodiment described above, the shift cylinder 14 may be connected to the shaft 10 of the leveling roll 2 to shift the leveling roll 2 as well.

In addition, although the above embodiment describes the upper half of the roller leveler, the same procedure can be applied to the lower half, and the thickness of each roll diameter may be adopted as appropriate other than in the embodiment. Furthermore, it goes without saying that the roll may be moved to several stages by the required stroke.

As explained above, according to the present invention, (i) Roll wear scratches and the like that occur on the intermediate roll can be dispersed in the roll axis direction, thereby extending the life of the roll.

(ii) From item (i) above, the number of roll replacements is reduced, so the number of spare rolls can be reduced.

(iii) Since the stop time of the roller leveler is shortened, the operating rate is improved.

(iv) Roll polishing time is reduced.

(v) Able to straighten high quality boards without roll marks.

It can produce excellent effects such as

[Brief explanation of drawings]

Figures 1A and B are both schematic diagrams showing the 6Hi type roller leveler, and Figure 2 is the - of Figure 1A.
An explanatory diagram of the roller leveler of the present invention corresponding to the arrow view, FIGS. 3 and 4 are explanatory diagrams showing the operating state of FIG. 2, and FIG. 5 is an explanatory diagram of another embodiment of the present invention, FIG. 6 is an explanatory diagram of the operation of FIG. 5. 2...Leveling roll, 3...Intermediate roll, 4...
Backup roll, 13...Shift cylinder.

Claims (1)

[Claims] 1. In a 6Hi type roller leveler in which a leveling roll is supported by a back-up roll via an intermediate roll, after at least one roll in contact with the intermediate roll is separated from the intermediate roll, the intermediate roll is A roll shift method for a roller leveler characterized by moving the roller in the axial direction. 2 A 6Hi type roller leveler in which a leveling roll is supported by a back-up roll via an intermediate roll, characterized in that the intermediate roll is moved in the axial direction with the intermediate roll in contact with another roll. How to shift the roll of a roller leveler. 3. Roll shift of a roller leveler characterized in that a 6Hi type roller leveler in which a leveling roll is supported by a back-up roll via an intermediate roll is provided with a means for moving the intermediate roll in the axial direction. Device.