JPH0557350A - Roll pitch variable roller leveler - Google Patents

Abstract

PURPOSE:To enable straightening of a plate from thin one to thick one with one kind of straightening rolls by shifting an upper frame and a lower frame assembling plural straightening rolls and backup rolls as liftable for each to line direction. CONSTITUTION:At the time of straightening the thin material, the backup roll stands are shifted outward to right and left directions with a shift cylinder 5 so that roll surfaces of all straightening rolls face to surface position. By this method, all straightening rolls can be used to the material to be straightened. Further, at the time of straightening the thick material, the backup roll stands are shifted to inward to right and left directions with the shift cylinder 5 so that the straightening roll vertically lifts/lowers to each one piece. By this method, the straightening rolls alternately becomes to recessing and projecting conditions and the straightening rolls are alternately worked as the straightening rolls to the material to be straightened and the other non- working rolls do not contact with the material to be straightened, and even the material having wide roll pitch and thick material can be straightened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roll leveler in which a plurality of straightening rolls arranged in a zigzag pattern are rotationally driven to repeatedly bend a strip plate and a steel plate to straighten the roll roll and to make the roll pitch variable. The present invention relates to a roll pitch variable roller leveler capable of correcting thick material and thin material with one roller leveler.

[0002]

[Prior Art]

(1) As shown in FIG. 6, when correcting from a thin plate to a thick plate, conventionally, a thin plate roller leveler (the right side of the drawing has a narrow correction roll pitch) and a thick plate roller leveler (the left side of the drawing has a correction roll pitch of We installed two units (wide) and used them separately for thin and thick plates. (JP-A-59-7426) (2) Also, as shown in FIG. 7, there is one leveler housing and two sets of straightening roll units for the roller leveler are prepared for the thick plate and the thin plate. There is a method of changing the straightening roll pitch by replacing this roll unit. (A) shows thick correction and (b) shows thin correction. (3) As shown in FIG. 8, there is a roller leveler configured such that the thin roll unit and the thick roll unit are incorporated into one leveler, and are selectively used according to the plate thickness. (Japanese Patent Publication No. 62-30044)

[0003]

[Problems to be Solved by the Invention]

(1) Install two roller levelers for thin plates (narrow correction roll pitch) and thick plate roller levelers (wide correction pitch) in Fig. 6 and use different roller levelers with different roll pitches depending on the plate thickness. However, there is a problem in that the equipment cost is high and the installation area is wide. (2) Further, as shown in FIG. 7, two sets of straightening roll units for the roller leveler are prepared for the thick plate and the thin plate, and the roll unit is changed to change the straightening roll pitch according to the plate thickness to be straightened. The method has a drawback in that when it is necessary to variably correct various plate thicknesses, the rolls need to be recombined frequently, which lowers workability. (3) Further, as shown in FIG. 8, in the case of a roller leveler configured by incorporating a thin roll unit and a thick roll unit into one leveler and selectively using them according to the plate thickness, the number of straightening rolls increases. There was a problem that the physical size of the equipment became large.

[0004]

SUMMARY OF THE INVENTION In order to solve the above problems and drawbacks, the present invention does not require roll reshuffling,
The roll pitch of the straightening roll is variable online, and it is possible to provide a compact and inexpensive roller leveler that can straighten thin to thick plates with one type of straightening roll. That is, (1) In a roller leveler that repeatedly bends a material to be straightened by a plurality of straightening rolls arranged vertically,
Shifting in the line direction an elevating device capable of ascending and descending a plurality of straightening rolls, an upper frame incorporating an upper roll group consisting of the plurality of straightening rolls and a backup roll, and / or a lower frame incorporating the entire lower roll group A roll pitch variable roller leveler characterized by being configured with a frame shift device (2) A backup roll stand supporting an odd number of backup roll groups and an even number of backup roll groups, and the backup roll thereof. (1) A roll pitch variable roller leveler according to (1), characterized in that a stand moving device for moving the stand in the line direction is provided. (3) A plurality of roll frames incorporating one straightening roll and a backup roll supporting the straightening roll. Arrange in the line direction, A roll pitch variable roller leveler (4), which is provided with a lifting device for lifting the roll frame and a roll frame shift device for collectively shifting the upper group and / or the lower group of the roll frame in the line direction. Roller level variable roller leveler characterized by arranging a plurality of roll frames incorporating a straightening roll and a backup roll supporting the same in the sheet passing direction, and providing an actuator for changing the frame interval between the roll frames. Is.

[0005]

By means of the above-mentioned means (1), when straightening thin materials, for example, as shown in FIG. 1 (a), the lower straightening roll is shifted to an appropriate position by the lower frame shift device, and all the straightening rolls are used. Then, narrow the roll pitch. When straightening thick material, as shown in FIG. 1 (c), the lower straightening rolls are shifted to appropriate positions by the lower frame shift device, and the straightening rolls are thinned one by one by the straightening roll elevating device. Widen the roll pitch.

By means of (2) above, in a roller leveler that supports one straightening roll by two rows of backup rolls, by adjusting the interval between the odd numbered backup rolls and the even numbered backup rolls, a thin material can be obtained. When straightening, as shown in FIG. 1A, the intervals of the backup rolls are widened so that all the straightening rolls can be used. In addition, when correcting thick materials, see Fig. 1 (c).
As shown in, narrow the gap between the backup rolls so that every other roll can be used.

By means of the means (3), every other roll frame incorporating a backup roll can be moved up and down by an elevating device. For example, in the case of straightening thin materials, as shown in FIG. When the thickening material is straightened by narrowing the roll pitch by using the straightening rolls of No. 3, the straightening rolls are raised or lowered every other roll by the elevating device as shown in FIG. Ascending, lowering the lower straightening roll, thinning out, widening the roll pitch. In order to secure the positions of the upper straightening roll and the lower straightening roll at proper positions, for example, in FIG. 4, the lower roll group can be collectively shifted. Although the lower roll group is shifted in FIG. 4, the upper roll group may be shifted.

By means of the above (4), the roll pitch of the straightening roll can be narrowed by an actuator provided between roll rolls incorporating one straightening roll and a backup roll supporting it, as shown in FIG. By expanding the roll material, the roll pitch can be narrowed to correct the thin material, and by expanding the roll pitch, the thick material can be corrected.

[0009]

EXAMPLES Examples of the present invention will be described below. 1, 2 and 3 show a first embodiment of the present invention. (1) A plurality of straightening rolls 1 arranged in a staggered pattern
Are supported by a plurality of backup rolls 2a and 2b, and the plurality of backup rolls 2a and 2b are incorporated in backup roll stands 3a and 3b, respectively, and are incorporated in the upper frame 7 together with the correction roll 1 on the upper side.

(2) The lower straightening roll 1 and the plurality of backup rolls 2a and 2b are incorporated in the lower frame 4, and the plurality of backup rolls are an even number and a backup roll stand 3a incorporating an odd number of backup rolls. The backup roll stands 3b that incorporate the backup rolls of the row are separately installed. (3) The backup roll stands 3a and 3b are independently shifted in the line direction by the shift cylinder (stand moving device) 5. The stand moving device is not limited to the cylinder, and may be a warm gadget or the like.

(4) When the thin material is straightened, as shown in FIG. 1 (a), the backup roll stands 3a and 3b are moved by the shift cylinder 5 so that the roll surfaces of all the straightening rolls are in the surface position. Shift left and right respectively. The shift amount is controlled by a position control device (not shown). (5) As a result, all the straightening rolls can be used as straightening rolls for the material to be straightened. That is, a roller leveler having a narrow roll pitch can be configured. (6) When straightening thick material, as shown in FIG. 1 (a), the backup roll stands 3a and 3b are respectively moved in the left and right directions by the shift cylinder 5 so that the straightening rolls rise or fall one by one. Shift in the direction.

The straightening roll is held by a spring 15 shown in FIG. 3 by an elevating device 16 having a structure in which the spring 15 is always pulled in the direction of contact with the backup roll. Therefore, it automatically moves up and down to the height of the portion in contact with the backup roll following the backup roll. In this embodiment, the elevating device having the spring structure is adopted, but an elevating device using a hydraulic cylinder, an air cylinder or the like may be used.

(7) Further, a frame shift device 17 for shifting the entire lower frame 4 in the line direction shifts the entire lower frame in the line direction by a half pitch of the straightening rolls. Although the entire lower frame is shifted in this embodiment, the entire upper frame or both may be shifted in the line direction.

(8) As a result, as shown in FIG. 1 (c), every other straightening roll becomes uneven, and every other straightening roll acts as a straightening roll on the material to be straightened. The roll does not come into contact with the material to be straightened, or slightly contacts the material to be straightened without having the function as a straightening roll. (9) With this, a roller leveler having a wide roll pitch and correcting thick material can be configured.

FIG. 4 shows a second embodiment of the present invention. (1) A plurality of straightening rolls 1 arranged in a zigzag pattern vertically are supported by respective backup rolls 2 along the material flow direction. (2) Each of the straightening rolls 1 and the backup rolls 2 supporting the straightening rolls 1 are incorporated into the roll frame 19 one by one. (3) Each of the roll frames 19 is mounted on the upper frame 7 and the lower frame 18 so that every other roll frame 19 can be vertically moved up and down. (4) An elevating device 13 for elevating the roll frame is provided on the roll frame. Further, the lower frame has a housing 8 so that it can be shifted in the line direction.
Is attached to.

(5) At the time of straightening a thin material, as shown in FIG. 4 (a), the lifting device 13 is moved up and down so that the surfaces of all the straightening rolls are in the surface position. (6) As a result, all the straightening rolls can be used as straightening rolls for the material to be straightened. That is, a roller leveler having a narrow roll pitch can be configured.

(7) When straightening thick materials, first, referring to FIG.
As shown in (b), the elevating device 13 is moved up and down so that every other straightening roll is in a concavo-convex state, and every other straightening roll acts on the material to be straightened as a straightening roll. Then, the position of the straightening roll is adjusted so that the straightening roll that does not act as the straightening roll does not come into contact with the material to be straightened, or slightly touches the material to be straightened without having the function of straightening.

(8) Then, as shown in FIG.
By the roll frame shift device 12 for shifting the lower frame 18 in the line direction, a half pitch of the straightening roll,
Shift in the line direction. (9) With this, a roller leveler for correcting thick material having a wide roll pitch can be configured.

Although the lower frame is shifted in this embodiment, the upper frame 7 is shifted, or an upper shift frame having an upper roll group is provided in the upper frame, and the upper shift frame is shifted. You can Although every other roll frame elevating device 13 is provided, the elevating device may be provided on the entire roll frame.

When the lifting device is provided on the entire roll frame in this way, in the case of thick material straightening, depending on the degree of roll wear, the roll marked with X shown in FIG. 4 (c) is used as a straightening roll. You can also in this case,
Raise the lower straightening roll marked X, lower the adjacent straightening roll, lower the upper straightening roll marked X,
This is done by raising the adjacent straightening roll and replacing the roll acting as the straightening roll.

FIG. 5 shows a third embodiment of the present invention. (1) A plurality of straightening rolls 1 arranged in a zigzag pattern vertically are supported by respective backup rolls 2 along the material flow direction. (2) Each of the straightening rolls 1 and the backup rolls 2 supporting the straightening rolls 1 are incorporated into the roll frame 6 for each set. (3) Each roll frame is mounted on the upper frame and the housing 8 so that it can be shifted in the material flow direction. (4) An actuator 11 for adjusting the interval between the roll frames is provided between the roll frames.

(5) When the thin material is straightened, as shown in FIG. 5 (a), the roll pitch is narrowed by reducing the actuator 11 in the material flow direction and narrowing the pitch of the straightening roll. A roller leveler for thin materials can be configured. (6) On the other hand, at the time of straightening a thick material, as shown in FIG. 5B, the actuator 11 is expanded in the material flow direction to widen the roll pitch of the straightening roll, and thus the roll pitch of the straightening roll is increased. A wide roller leveler for thick materials can be constructed.

Further, as another embodiment of the present invention, the range in which the roll pitch is variable is not limited to all the straightening rolls, and a group of straightening rolls having a variable roll pitch can be specified and used according to the application. good.

[0024]

EFFECTS OF THE INVENTION According to the present invention, (1) an appropriate straightening roll pitch can be obtained according to the plate thickness with one roller leveler, so that the equipment cost can be greatly reduced. (2) Since the straightening roll pitch can be changed online without changing rolls, workability is extremely high. (3) Since the rolls can be effectively used for thin and thick rolls, the number of rolls can be reduced. (4) Depending on the degree of roll wear, it is possible to change and use the roll used for thickening,
The frequency of roll replacement can be reduced and productivity is improved. There are many industrial effects such as.

[Brief description of drawings]

1A, 1B and 1C are side views of a first embodiment of the present invention.

FIG. 2 is an arrow AA of FIG.

3 is a cross-section BB of FIG.

4 (a), (b) and (c) are side views of a second embodiment of the present invention.

5 (a) and 5 (b) are side views of a third embodiment of the present invention.

FIG. 6 is an explanatory diagram of a conventional technique.

FIG. 7 is an explanatory diagram showing another example of the conventional technique.

FIG. 8 is an explanatory diagram showing still another example of the conventional technique.

[Explanation of symbols]

1 Straightening Roll 2 Backup Roll 2a Odd Row Backup Roll (Diagonal Roll) 2b Even Row Backup Roll 3a Odd Row Backup Roll Stand 3b Even Row Backup Roll Stand 4 Lower Frame 5 Backup Roll Stand Moving Device 6 Roll Frame 7 Upper frame 8 Housing 9 Reduction screw 10 Reduction device 11 Actuator (Expansion / contraction device) 12 Roll frame shift device 13 Roll frame lifting device 14 Roll chock 15 Spring 16 Straightening roll lifting device 17 Frame shift device 18 Lower frame 19 Roll frame

Claims (4)

[Claims] 1. A lifting and lowering device capable of ascending and descending each of a plurality of straightening rolls in a roller leveler for repeatedly bending a material to be straightened by a plurality of straightening rolls arranged vertically, and the plurality of straightening rolls and a backup. A roll pitch variable roller leveler comprising a frame shift device for shifting an upper frame incorporating an upper roll group composed of rolls and / or a lower frame incorporating an entire lower roll group in a line direction. 2. A backup roll stand supporting an odd number of backup roll groups, a backup roll stand supporting an even number of backup roll groups, and a stand moving device for moving the backup roll stand in the line direction. Claim 1 characterized by
Roller level variable roller leveler described. 3. An elevating device for arranging a plurality of roll frames incorporating one straightening roll and a backup roll supporting the same in a line direction and elevating the roll frame, and an upper group of the roll frame and / or A roll pitch variable roller leveler having a roll frame shift device for collectively shifting the lower group in the line direction. 4. A plurality of roll frames incorporating one straightening roll and a backup roll supporting the straightening roll are arranged in a sheet passing direction, and an actuator for changing a frame interval is provided between the roll frames. Roller leveler with variable roll pitch.