JPS62203616A - Roller leveler device - Google Patents

Abstract

PURPOSE:To well straighten various thickness strips by making a part of rolls among an upper and a lower roll group rectratable and either one of roll group of the upper and the lower roll group movable so that roll pitches are changed. CONSTITUTION:In the case of a thin strip S, a main roller leveler 20 and a sub-roller leveler 40 hold the thin strip S, the leveler 20 gives the strip S a tension, and the leveler 40 gives the strip S repeated bendings to perform straightening work. In the case of a thick strip S, a part of upper rolls and of lower rolls of the leveler 20 are retracted, a lower carriage 24 is moved to extend a roll pitch, and unretracted upper and lower rolls give the thick strip S repeated bendings to straighten deformed shapes. This device performs well straightening work from a thin strip to a thick one and to remarkably expand the straightenable strip thickness range.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a roller leveler device for correcting residual stress, shape defects, etc. in rolled strips, and in particular, the present invention relates to a roller leveler device for correcting residual stress and shape defects in rolled strips, and in particular, it is capable of correcting from thin to thick plates by varying the pitch of the rolls. It is designed to be possible.

<Prior art> A roller leveler is a device that removes residual stress and corrects shape defects by sandwiching a strip with residual stress or shape defects due to rolling between rolls and repeatedly bending the strip. The rolls included in the roller leveler are connected to a drive motor so that they rotate synchronously.

Here, in order to straighten a thin strip plate, such as a plate thickness of 10 m or less, a main roller leveler having a relatively large diameter roll and an n10 roll leveler having a relatively small diameter roll are required. A roller leveler device is used.

The conventional roller leveler device, as shown in FIG.
1. The main roller leveler 1 includes an upper roll group having a plurality of rolls 2 (four in the illustrated example), a lower roll group having a plurality* (five in the illustrated example) of rolls 3, and rolls 2.3. It is provided with a plurality of backup rolls 4 and 5 that respectively support the rolling blades, and a housing 6 that supports these rolls 2 and 3°4.5.

The rolls 2 and 3 are arranged horizontally and in parallel, and the rolls 2 and 3 are set half-pitch apart, and the strip S to be straightened is fed between the rolls 2 and 3. The strip S is repeatedly bent to correct its shape and remove residual stress. The auxiliary roller leveler 11 includes an upper roll group having a plurality of rolls 12 (two rolls in the illustrated example) having a diameter smaller than that of the main roller leveler 1;
It is provided with a lower 1'' roll group having a plurality of rolls 13 (three in the illustrated example) of similar small diameter, and a housing 14 that supports these rolls 12,13. Roll 12.1
3 are arranged horizontally and parallel to each other, and the rolls 12 and 13 are shifted by a half pitch at a constant distance of Δ2,
A strip S to be straightened is fed between the rolls 12 and 13, and the strip S is repeatedly bent to correct its shape and remove residual stress.

When straightening a thin strip S using such a roller leveler device, the roll 12.1 of the a10-ra leveler-11 is mainly used.
The band plate S is straightened with a scissor lυ in 3 minutes, but at this time,
The strip S is also held between the rolls 2 and 3 of the main leveler 1 to apply tension to the strip S, and in this state the strip S is repeatedly bent.

<Problem rλ to be solved by the invention> In the roller leveler device as described above, when trying to straighten a very thin strip S, for example, 6M or less in thickness, the main Roll 2.
There was not enough force to hold the strip S between rolls 2 and 3, and the strip S slipped between rolls 2 and 3, and sufficient tension was not applied to the strip S. It was inevitable that this would happen. As a countermeasure for this problem, it is possible to set the pitch of each of rolls 2 and 3 small so that even a thin strip S can be held sufficiently between rolls 2 and 3. If the pitch is set small, for example, when trying to straighten a thick strip S with a thickness of 50# or more, the C rolling reaction force will become large and sufficient support by the backup rolls 4 and 5 will not be achieved. There is a fukodai. Therefore, the conventional roller leveler device has a problem in that the range of plate thickness that can be corrected is narrow.

The present invention has been made in view of the above-mentioned conventional circumstances, and an object of the present invention is to provide a roller leveler device that can perform good straightening of both thin and thick strip plates.

<Means for Solving the Problems> The 11-ra leveler equipment of the present invention is comprised of an ill 11-ra leveler that has small-diameter rolls on the upper and lower sides, and a large (
The roller leveler device includes a main roller leveler having a plurality of upper and lower rollers, and straightens a band plate by applying tension between the sub roller leveler and the main roller leveler. A leveler is provided so that one roll group and a part of the lower roll group can be retracted, and at least one of the roll groups at the back of the upper roll group or the lower roll group is moved parallel to the traveling direction of the strip plate. Move to iJ
The roll pitch is variable.

When straightening a thin strip, use all the rolls of the main roller leveler and use the sub-roll leveler to apply tension to the strip between the main roller leveler and the 010-roll leveler. do. On the other hand, when straightening a thick strip, some of the rolls of the main roller leveler are retracted and the roll group is moved parallel to the traveling direction of the strip to widen the roll pitch.

<Example> An embodiment of the present invention will be described with reference to the drawings.

1 and 2 are conceptual diagrams showing the roller leveler device of this embodiment, respectively. FIG. 1 shows the straightening work for a thin strip, and FIG. 2 shows the straightening work for a thick strip. As shown,
The roller leveler device includes a main roller leveler 20 and sub-roller levelers 40 provided on the inlet side and the outlet side of the main roller leveler 20, respectively. 6 rolls) roll 2
An upper roll group having rolls 1a to 21f, a lower roll group having a plurality of (seven in the illustrated example) rolls 22a to 22Cl 4-, and an upper kit supporting the upper roll l)Y.
ridge 23, a lower kittridge 24 supporting the lower roll group, and rolls 21b, 21d, 21 in the upper roll group.
The hydraulic cylinder 25 moves the rolls 22b, 22d, and 22f in the lower roll group in the downward direction.
A hydraulic cylinder 26 for moving the retraction M and a lower carriage 2 installed on a base 27 via a bearing 28.
4 in parallel to the traveling direction of the strip S (arrow direction in the figure). As shown in Fig. 1, when straightening a thin strip S, all rolls 2
1a to 21f, 22a to 22C] are used, and the rolls 21a to 21f and rolls 22a to 22Cl, which are arranged horizontally and in parallel, are shifted by half a pitch. On the other hand, when straightening a thick strip S as shown in FIG. 2, the rolls 21b, 21d of the upper roll group,
21f is retracted upward, and the rolls 22b, 22d, 22'' of the lower roll group are retracted downward l\jg, and the lower carriage 24 is further moved half a pitch to the left in the figure,
The roll pitch of the main roller leveler 20 is expanded.

The auxiliary roller leveler 40 includes an upper roll group having a plurality of rolls 41 (two in the illustrated example) having a smaller diameter than the rolls of the main roller leveler 20, and a plurality of rolls 42 (three in the illustrated example) also having a smaller diameter. It includes a lower roll group having a lower roll group and an upper carriage 43 capable of retracting the rolls 41 of the upper roll group upward. The rolls 41 and 42 are arranged horizontally and parallel to each other, and the rolls 41 and 42 are shifted by half a pitch and are spaced apart by BU%.
As shown in Fig. 1, when straightening a thin strip S, the upper roll group is normally lowered, or as shown in Fig. 2, when straightening a thick strip S, the upper roll group is retracted upward. Ru.

A band straightening operation performed using the roller leveler device having the above configuration will be explained. First, when straightening a thin strip S, as shown in FIG. 1, the strip S is sandwiched between the main roller leveler 20 and the sub roller leveler 40,
, : The strip 3 is pulled and tensioned, and the sub roller leveler 40 repeatedly bends the strip 3 to correct any defects in the shape of the strip S. At this time, the roll pitch of the main roller leveler 20 is set so as to achieve sufficient retention when holding the thin strip S, so a tension of "-" is applied to the strip S. be done. Next, when straightening the uneven strip S, use the sub roller leveler 4 as shown in FIG.
↑1'' - 1 call 21b of the leveler 20.

21d, 21f, 22b, and 22(1, 22r) are retracted, respectively, and the lower part-1 false ridge 24 is moved to widen the roll pitch, and the roll 21a is moved.

21G, 21e, 22a, 22c, 22e.

The defective shape W is corrected by repeatedly bending the strip S between 22Ω. At this time, the roll pitch of the main roller 20 is set to JyL/ so that the rolling reaction force does not increase even when a thick strip S is held, so it can be straightened in a good condition. Able to carry out work.

In addition, in the above embodiment, the roll 2 of the raw roller leveler 20
1b, 21d, 21f, 22b, 22d.

22f is retracted upward or downward, but these I calls may be moved and retracted to the axial direction l\ side. Further, although the F section carriage 24 is moved, the upper roll fermentation may be moved by moving the upper key ridge 23. You can do it like this.

<Effects of the Invention> According to the roller leveler device of the present invention, it is possible to perform good straightening from thin to thick strip plates, and to limit the range of plate thickness that can be performed by a person [1]. ].

[Brief explanation of drawings]

1 and 2 are conceptual diagrams showing a roller leveler device according to one embodiment of the present invention, and FIG. 3 is a conceptual diagram showing a conventional roller leveler device.
It is necessary to have a rough idea of the color scheme. In the drawings, 20 is a main roller leveler, 21 a to 21 f, 22 a to 22 QtJ rolls, 25.29 is a hydraulic cylinder, 40i is an auxiliary roller leveler, 41.42 is a roll, and S is a strip plate.

Claims (1)

[Claims] A sub-roller leveler having a plurality of small-diameter rolls on the top and bottom, and a main roller leveler having a plurality of large-diameter rolls on the top and bottom, and a strip plate is provided between the sub-roller leveler and the main roller leveler. In a roller leveler device for straightening by applying tension, the main roller leveler is provided so that some of the rolls in the upper and lower roll groups can be retracted, and at least one of the upper and lower roll groups is provided. A roller leveler device characterized in that one of the roll groups is configured to be movable in parallel to the traveling direction of the strip, and the roll pitch is variable.