JPH025487B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a tension leveler, which facilitates rearrangement of the leveling unit.

Conventionally, tension levelers have been used to improve the surface flatness of rolled products in the form of strips.

This tension leveler usually has a plurality of leveling units equipped with a plurality of vertically opposed rolls of different diameters arranged in multiple rows along the direction of travel of the plate, and rotates the rolls while applying tension to the plate, and then rotates the rolls to form a plate. It is made flat by bending it up and down.

In such a tension leveler, the rolls often wear unevenly over time and need to be replaced frequently.In particular, the rolls of the work roll unit, which consists of a group of small diameter rolls in the leveling unit, wear out. is large and needs to be replaced most often.

Therefore, in conventional tension levelers, one way to replace the rolls is to separate each roll unit in the housing into two blocks, upper and lower.
Wheels are attached to the upper and lower blocks so that each block can be pulled out horizontally off-line in a direction perpendicular to the direction in which the plate travels, and after being pulled out, the rolls are replaced with spare rolls or repaired.

However, with this method, in order to replace or repair the upper roll unit, it is necessary to pull the upper block offline and flip it upside down using an overhead crane to improve work efficiency, but this flipping work is dangerous. There are drawbacks such as the fact that it is accompanied by a large amount of time and takes a considerable amount of time.

Another method is to divide each roll unit, including the housing of the tension leveler, into two upper and lower blocks, and to make the upper block rotatable by 180 degrees in the direction of movement of the plate through a hinge or the like. There are methods for replacing or repairing each roll online, which makes replacing and repairing rolls easier than when pulling them offline, but it is necessary to stop the equipment (rolling line, etc.) during these operations, and the hinge When the upper block is restored, it is difficult to maintain the assembly accuracy of the upper and lower roll units due to gaps in the rotating parts, etc., and the centering of the upper and lower roll units must be done manually, making assembly difficult. It has drawbacks such as requiring a long time.

The object of the present invention is to provide a tension leveler which eliminates such conventional drawbacks, facilitates and shortens the replacement and repair work of the upper work roll unit, and ensures the installation accuracy after replacement to a predetermined value. do. The structure of the present invention that achieves this object is a tension leveler in which a plurality of leveling units each having vertically opposing rolls are separated into an upper frame and a lower frame along the direction of movement of the plate. fixing means for making the installed upper work roll unit movable along a rail installed in the upper frame in a direction perpendicular to the plate traveling direction and for fixing and positioning the upper work roll unit at a predetermined position on the upper frame; A rail for evacuation of the upper work roll unit connected to the rail and forming a straight line is laid on one outside of the upper frame in a direction perpendicular to the plate traveling direction, while a spare work roll unit is installed on the other outside. A rail for feeding the spare work roll unit that is placed and moved and connected to the rail installed in the upper frame to form a straight line is laid, and the spare work roll unit is pressed into the upper frame. The present invention is characterized in that it is provided with a pushing means for moving and retracting the upper work roll unit of the upper frame.

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

As shown in FIG. 1, which is a front view as seen from the direction in which the plate material is traveling, the tension leveler of the present invention has five leveling units 3 to 7 provided with vertically opposing rolls in a housing 1 with a plate material 2 in between. are arranged along the plate traveling direction X. Each of the leveling units 3 to 7 is composed of a deflector roll 8 with two rolls and a work roll unit 9 with one or more rolls, which are alternately arranged vertically. Of these, the work roll units 9 of the leveling units 3, 4, and 5 each have one small work roll 10,
It comprises two intermediate rolls 11 and a plurality of rows of backup rolls 12, and the work roll unit 9 of the leveling unit 6 comprises one work roll 10 and two backup rolls 12,
Work roll unit 9 of leveling unit 7
is composed of only one work roll 10. The upper roll unit of each of these leveling units 3 to 7 is attached to an upper frame 13, and wheels 14 are attached to both ends of this upper frame 13 in the direction of board movement X, and these wheels 14 are connected to a pair of side frames 1a. , 1b is mounted on a rail 15 installed perpendicularly to the direction of movement of the plate material X inside the upper part of the housing 1, and is movable so that it can be pulled out offline. On the other hand, this upper frame 13 is attached to the housing 1
An inverted T-shaped groove is formed in the upper center of the upper frame 13 in order to fix the hydraulic cylinders 1 to the side frames 1a and 1b.
No. 6 rods are engaged and can be pressed and held. Further, the lower roll unit of each of the leveling units 3 to 7 is mounted on a lower frame 17, and wheels 18 are attached to both ends of this lower frame 17 in the board material traveling direction X.
8 is a rail 1 constructed on the inside of the lower part of a pair of side frames 1a and 1b in a direction perpendicular to the board traveling direction X.
9, it is possible to push it out offline, and it is connected to a hydraulic cylinder 20 installed offline and driven to push it out. Further, in order to fix the lower frame 17 to the housing 1, the rods of a pair of hydraulic cylinders 21 attached to the side frames 1a and 1b are attached to the lower frame 17.
While abutting the lower end, it can be held by pressing via support stands 22 attached to opposing surfaces of the upper frame 13 and lower frame 17, respectively.

On the other hand, the work roll unit 9 at the top of the leveling unit 4, which is most often in need of replacement, is attached to the leveling unit frame 23 so that it can be pulled offline independently of the upper frame 13 to replace or repair the work roll 10, etc. It is installed in the upper frame 13, and in order to restrict vertical movement and fix it to the upper frame 13, an inverted T-shape is installed at the upper part of the leveling unit frame 23, as shown in enlarged form in FIGS. 4 and 5. A shaped groove 23a is formed in the direction perpendicular to the progress of the plate, and a hydraulic cylinder 24 is attached to the upper frame 13 so that its rod can be engaged with the groove 23a and held under pressure. In addition, regarding the plate material traveling direction A cylinder 25 is attached, and a stopper 26 attached to the tip of the rod is capable of reciprocating along a guide member 27, while a recess into which the stopper 26 is fitted is formed on the opposite surface of the leveling unit frame 23. 2
3b is formed, and the stopper 26 and the reference surface 13
a, the longitudinal and lateral axes of the work roll unit 9 are automatically aligned with predetermined positions.

In addition, a rail 28 is installed on the upper frame 13 in a direction perpendicular to the plate material traveling direction Wheels 29 are attached to both ends. Then, on one side of the tension leveler in the board material traveling direction X and the straight traveling direction, for example, as shown in FIG. 2 and FIG. 30 is attached to a base 31, and a roll exchange table 32 is provided on this base 31 to place the work roll unit 9 pulled out along the rail 30. A stopper 33 with a cushion made of anti-vibration rubber or the like is fixed in order to lock it.

On the other hand, on the opposite side of the tension leveler, that is, on the left side in FIGS. 2 and 3, there is a rail 34 on the base 31 that is in line with the rail 28 installed on the upper frame 13, as on the right side. Once installed, a leveling unit frame 23' with a spare work roll unit 9' for replacement can be placed and installed in the upper frame 13. Between the rail 34 and the base 31, a replacement cart 35, which is equipped with a spare work roll unit 9' and various devices for replacement work and is self-propelled by a traveling drive device (not shown), is installed and laid on the base 31. rail 3
6, and an arm 37 is installed on the side of the exchange trolley 35 to stop and hold it in a predetermined position.
is provided protrudingly, and the arm 37 is clamped and fixed between a stopper 38 attached to the base 31 and a clamp 39 consisting of a hydraulic cylinder. A pair of left and right electric chains 40 are disposed along the rails 36 on the exchange cart 35, and are engaged with the electric chains 40 so as to be able to move horizontally by at least a stroke equal to the total length of the work roll units 9, 9'. A pressing head 41 is provided so as to be able to come into contact with the rear end surface of the preliminary work roll unit 9'. Note that the drive system for the exchange cart and the pressing head is not limited to the above-described method, and any other drive system such as a cylinder drive system may be used.

When replacing the work roll unit 9 at the top of the leveling unit 4 with the tension leveler configured as described above, first operate the hydraulic cylinder 25 as a fixing device and move the stopper 26 from the recess 23b of the leveling unit frame 23. The plate is pulled out to release the fixed state in the direction of movement of the plate material X, and then, in order to release the fixed state in the vertical direction of the leveling unit frame 23, the hydraulic cylinder 24 is operated to lower the leveling unit frame 23 and the wheels 29 are placed on the rails 28. so that it is placed. Next, the exchange cart 35 and the pre-installed spare work roll unit 9' are moved along the rail 36, and the rail 34 is connected to the rail 28 of the upper frame 13, and the stopper 38 is connected at a predetermined position. The exchange trolley 35 is held with the arm 37 sandwiched between clamps 39 made up of hydraulic cylinders.
Hold it fixed. After this, when the electric chain 40 constituting the pushing device is driven and the press head 41 pushes the preliminary work roll unit 9', the front end surface of the preliminary work roll unit 9' is inline with the leveling unit frame of the work roll unit 9. The work roll unit 9 is moved onto the rail 30 which is in line with the rail 28 while making contact with the rear end surface of the work roll unit 23, and is placed on the roll exchange table 32, where it comes into contact with the stopper 33 and is locked. Ru. As a result, the preliminary work roll unit 9' is stopped at approximately a predetermined position on the upper frame 13. Therefore, the hydraulic cylinder 25 as a fixing device is operated to fix the reference surface 1 of the upper frame 13.
3a and the stopper 26 are engaged with the recess 23b, positioning is performed in the board traveling direction X, and the hydraulic cylinder 24 is actuated to raise the leveling unit 23 along the reference surface 13a to perform vertical positioning. As a result, the spare work roll unit 9' is automatically and reliably held in the predetermined assembly center position within the upper frame 13. Thereafter, the fixed holding of the replacement cart 35 is released and the replacement cart 35 is retreated to a predetermined standby position, and the electric chain 40 is reversed to place the pressing head 41 in the standby position as well, completing the replacement work.

As is clear from the above description, according to the present invention, the upper work roll unit 9 of the leveling unit 4 can be easily replaced with the spare work roll unit 9' in a short time, and the line for roll replacement or repair can be easily replaced. This greatly reduces downtime and improves productivity. In addition, the used roll unit that has been replaced can be maintained while the line is in operation, which shortens the time required for replacement work. Furthermore, because only the work roll unit can be taken offline, the handling size and weight are smaller compared to the conventional replacement method, and the work of reversing the replaced roll unit is also easy, which has the advantage of ensuring work safety. be.

Although the above embodiment has been described with reference to replacement of the upper work roll unit of the leveling unit 4, the present invention can also be applied to replacement of other upper work roll units.

As described above in detail with the embodiments, according to the present invention, the replacement and repair work of the upper work roll unit is facilitated, and the work time can be significantly shortened, resulting in shorter line stoppage time and improved productivity. do. Furthermore, the installation accuracy of the work roll unit after replacement is high and no adjustment is required.

[Brief explanation of drawings]

1 to 5 show an embodiment of the tension leveler of the present invention, in which FIG. 1 is an overall front view along the direction of plate material movement, and FIG. 2 is a view taken along arrow A-A in FIG. Figure 3 is a plan view of Figure 2, Figure 4 is an enlarged view of the main parts,
FIG. 5 is a view taken along the line B--B in FIG. 4. In the drawing, 1 is a housing, 2 is a plate material, 3 to 7 are leveling units, 9 and 9' are work roll units, 13 is an upper frame, 23 and 23' are leveling unit frames, 24 and 25 are hydraulic cylinders, and 26 is a 28, 30, 34 are rails, 29 are wheels, 35 is an exchange cart, 40 is an electric chain, and 41 is a pressing head.

Claims (1)

[Claims] 1. In a tension leveler in which a plurality of leveling units equipped with vertically opposing rolls are separately installed on an upper frame and a lower frame along the direction in which the plate material advances, the upper work roll unit, which is separated in the upper frame, is used to control the plate material progress. The upper work roll unit is movable along a rail installed in the upper frame in a direction perpendicular to the upper frame, and a fixing means is provided for fixing and positioning the upper work roll unit at a predetermined position of the upper frame. A linear upper work roll unit evacuation rail connected to the rail is laid on one outside in the direction perpendicular to the upper frame, while a spare work roll unit is placed on the other outside and is moved. A rail for feeding the preliminary work roll unit which is connected to the rail installed in the upper frame and becomes a straight line is laid, and the preliminary work roll unit is pressed and moved into the upper frame, and the upper work roll in the upper frame is moved. A tension leveler characterized by being provided with a pushing means for retracting a unit.