JPS6236766B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a roll shift device in a roller leveler.

Generally, in order to straighten the strip, a roller leveler is used in which a plurality of leveling rolls 2 are arranged to alternately sandwich the strip 1 from its upper and lower surfaces, as shown in FIGS. 1A and 1B. Each leveling roll 2 is supported by a divided back-up roll 3 for reinforcement and for flexible flexibility.

However, since these roller levelers are provided with a divided back-up roll 3, as shown in FIG. Roll defects 4 such as indentations caused by biting of foreign matter and convex projections caused by selective wear occur, and these defects 4 are transferred to the strip 1, causing so-called roll defects to deteriorate product quality. Conventionally, when such a defect 4 occurred on the leveling roll 2, it was frequently replaced with a new roll, and the old roll was polished in the meantime. During replacement, the roller leveler must be stopped, which lowers the operating rate, and also requires a large number of spare rolls, which is economically disadvantageous.

In view of these circumstances, the present invention extends the life of the roll by appropriately shifting the roll in the axial direction to prevent the occurrence of roll defects and disperse them, thereby improving the operating rate and increasing the availability of spare parts. The aim is to reduce rolls and achieve high quality strip straightening.

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

FIG. 3 shows one end of the lower side of a roller leveler similar to that shown in FIG. 1B, and each back-up roll 3 supporting the leveling roll 2 is
It is shown arranged on a base frame 6 such that the pressing force against the leveling roll 2 can be adjusted by a wedge mechanism 5 or the like, and the axle box 7 of the leveling roll 2
is placed on a pedestal 8 provided at the end of the base frame 6 via a holding frame 9 that removably supports the axle box 7, and as shown in FIGS. 4 and 5, a holding frame 9 that holds the axle box 7 An elevating cylinder 16 is arranged between the housing 18 and the base frame 6, and the end of the axle box 7 is engaged with the elevating guide 17a of the guide block 17 so as to be able to move up and down. 19 so as to be horizontally movable, and the body of a horizontal cylinder 20 whose rod protrudes from both sides is fitted into the guide block 17, and both ends of the rod are fixed to both end surfaces of the horizontal guide 19. be.

Therefore, if a slight defect such as roll wear occurs on the surface of the leveling roll 2, the lifting cylinder 16
When the horizontal cylinder 20 is operated and the lifting cylinder 16 is further contracted, the axle box 7 rises along the lifting guide 17a of the guide block 17, and the leveling roll 2 is temporarily moved up to the back up roll 3.
A linear three-dimensional movement is obtained in which it moves in the axial direction away from the center and then comes into contact with the backup roll 3 again. In addition, the lifting cylinder 16 and the horizontal cylinder 2
If the operations 0 are performed in association with each other, the leveling roll 2 can be shifted in an arc shape.

By appropriately performing this operation for each pass, defects occurring in the leveling roll 2 can be made uniform in the roll axis direction, thereby extending the life of the leveling roll 2 and reducing the number of roll replacements.
Furthermore, the leveling roll 2 does not slide against the back-up roll 3 during shifting, thereby preventing scratches.

In the case of such an embodiment, a screw rod may be used instead of the cylinder 20, and a worm jack may be used instead of the elevating cylinder 16, and although linear elevating is no longer possible, the elevating cylinder A link may be used instead of 16.

FIG. 6 shows a second embodiment of the device of the present invention, in which the intermediate portion is placed on a base frame 6 or on a pedestal 8.
The upper end of the lever 11, which is pivotally connected to the lower part with a pin 14, is connected with a pin 13 to a bracket 12 fixed to the holding frame 9 of the axle box 7, and the lower end of the lever 11 is connected with a pin to the horizontal cylinder 10. It is.

When such a system is adopted, the cylinder 10
When the lever 11 is expanded or contracted, the lever 11 rotates about the pin 14, so that the leveling roll 2 can be shifted along an arcuate trajectory in the axial direction while being raised.

FIG. 7 shows a third embodiment of the device of the present invention, in which the axle box 7 and guide block 17, and the guide block 17 and horizontal guide 19 shown in FIG. 4 are offset by 90 degrees. Furthermore, the elevating cylinder 16 and the horizontal cylinder 20 are installed in reverse. That is, the housing 18 includes the lifting guide 1.
9' is attached, a horizontal guide 17b is provided on the guide block 17 that engages with the lifting guide 19', the lifting cylinder 16 is installed between the guide block 17 and the base frame 6, and the horizontal cylinder 20 is attached to the holding frame 9. This configuration is placed on the side.

Even with such a system, the same effects as in the first embodiment can be obtained.

8 and 9 show a fourth embodiment of the device of the present invention, in which links are disposed facing each other in a dogleg shape between a holding frame 9 and a base frame 6 via spherical bearings 23, respectively. A horizontal cylinder 10 is connected between 21, 21 and 22, 22 to form a so-called toggle mechanism.

In the case of this system, the leveling roll 2 can be raised and lowered by the expansion and contraction movement of the cylinder 10, and the leveling roll 2 can also be shifted in the axial direction by a horizontal cylinder or the like. However, when shifting in the axial direction, the toggle mechanism swings by the spherical bearing 23 as shown in FIG.

Note that the fourth embodiment shows a leveling roll 2 supported by an axle box 7 having a multi-divided structure, and the other embodiments show a leveling roll 2 supported by an axle box 7 having an integral structure. Generally, in roller levelers, split axle boxes and integral axle boxes are used depending on whether they are large or small, which means that the present invention can be applied to any roller leveler. Further, in each of the embodiments described above, the lower part of the roller leveler has been described, but it goes without saying that the same can be applied to the upper part.

By the way, there are roller levelers shown in Fig. 1A,
In addition to the method in which the leveling roll 2 is directly supported by the back-up roll 3 as shown in B, there is also the so-called 6Hi method in which the leveling roll 2 is supported by the back-up roll 3 via an intermediate roll. In the roller leveler of this type, similar effects can be obtained by employing each of the embodiments described above for the intermediate roll. It should be noted that a pinion rack or a screw nut may be used in place of the lift cylinder 16 and shift cylinder 20, or a member that maintains the distance between the left and right roll axle boxes may be used.

As explained above, according to the present invention, (i) defects such as wear scratches occurring on the rolls supported by the split support rolls are dispersed in the roll axis direction by moving the rolls in the roll axis direction; This increases the life of the roll. Furthermore, since no sliding occurs between the rolls during roll shifting, it is possible to prevent scratches from occurring.

(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. It can produce excellent effects such as

[Brief explanation of the drawing]

Figures 1A and B are explanatory diagrams showing the outline of a roller leveler, and Figure 2 is an illustration of Figures 1A and B.
3 is a partial front view showing the first embodiment of the device of the present invention, FIG. 4 is a view in the direction of FIG. 3, and FIG. 5 is a view in the direction of FIG. 4. 6 is a partial front view showing the second embodiment, FIG. 7 is a partial side view showing the third embodiment, FIG. 8 is a schematic side view showing the fourth embodiment, and FIG. 9 is a partial front view showing the second embodiment. This is a view taken along the - arrow in FIG. 1...Strip, 2...Leveling roll,
3...Backup roll, 6...Base frame, 7...Axle box, 9...Holding frame, 10...
Horizontal cylinder, 11...Lever, 12...Bracket, 16...Elevating cylinder, 17...Guide block, 18...Housing.

Claims (1)

[Claims] 1. In a roller leveler, the function of moving the roll supported by the support roll in the axial direction,
1. A roll shift device for a roller leveler, characterized in that a holding frame for a roll axle box is provided at an operating end of the device having a function of raising and lowering, and the roll axle box is detachably attached to the holding frame.