JPS59104218A - Tension leveler - Google Patents

Abstract

PURPOSE:To repair easily and to prevent an operation time from lowering, by taking out each frame in the lateral direction and taking in and out separately a rolling reduction unit and its spare in a straightening machine consisting of an upper and a lower frames. CONSTITUTION:An upper frame 13 is taken into a housing 1 by rollers 14 traveling on rails 15 and is lifted to be fixed by a cylinder 16. A lower frame 17 is taken into the housing 1 by rollers 18 traveling on rails 19, and is pushed up by a cylinder 21 and is fixed by bringing it into contact with a supporting bed 22. A rolling reduction unit 23 of the upper frame 13 is fed into the housing 1 by rails 34 of an exchanging truck 35, and rails 28, rollers 29 housed in the frame 13, and is fixed by cylinders 24, 25. A spare unit is fed into the housing 1 from the opposite side by rails 30. The exchange and repair thereof are easily performed by taking them out.

Description

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

Tension levelers have conventionally 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 opposing 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 moves the plate up and down. It is made flat by bending it.

In such tension levelers, each roll often wears unevenly over time and must be replaced frequently.Especially, the work roll unit consisting of a group of small diameter rolls in the leveling unit Rolls are heavily worn and need to be replaced most often.

Therefore, in conventional tension levelers, one way to replace the rolls is to separate each roll unit in the nozzle into two upper and lower blocks, attach wheels to the upper and lower blocks, and replace each block with a plate material. The roll can be pulled out horizontally off-line perpendicular to the direction of travel, and after being pulled out, the roll can be replaced with a spare roll or repaired.

However, with this method, in order to replace or repair the upper roll unit, it is necessary to lift the upper block offline and turn it upside down using an overhead crane to improve workability, but this turning operation is dangerous. There are disadvantages such as the fact that it is accompanied by a lot of noise and takes a long 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 with respect to the direction of plate material movement via a hinge or the like. Is it possible to replace or repair each roll online?
Replacing and repairing rolls is easier than using the method of pulling them offline, but it is necessary to stop the equipment (rolling line, etc.) during these operations, and the upper When the block is restored, it is difficult to maintain the assembly precision of the upper and lower roll units, and there are drawbacks such as the need to manually center the upper and lower roll units, and the assembly process taking a long time.

The present invention aims to eliminate such conventional drawbacks, to provide a tension leveler that facilitates and shortens the replacement and repair work of the upper work roll unit, and that can ensure installation accuracy at a predetermined value after replacement. . 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 separately installed in an upper frame and a lower frame along the direction of movement of the plate. The upper work roll unit is movable along a rail installed in the upper frame in a direction perpendicular to the direction in which the plate material travels, and the upper work roll unit is fixedly positioned at a predetermined position on the upper frame. A linear upper work roll unit evacuation rail connected to the rail is laid on one outer side of the upper frame in a direction perpendicular to the plate traveling direction, while a spare work roll unit is mounted on the other outer side. laying a rail for feeding the spare work roll unit, which is placed in a straight line and connected to the rail installed in the upper frame, and presses the spare work roll unit 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 within the upper frame.

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

The tension leveler of the present invention, as shown in FIG. 1, which is a front view as seen from the direction in which the plate material advances, includes five leveling units 3 to 3 each having vertically opposing rolls that hold the plate material 2 in the Ujifugu 1. 7 are disposed along the board traveling direction X. Each leveling unit 3 to 7 is composed of a deflector roll 8 having two rolls and a work roll unit 9 having one or several rolls,
Each one alternates up and down. Of these, the work roll units 9 of the leveling units 3, 4.5 each include one small-diameter work roll 10, two intermediate rolls 11, and multiple rows of backup rolls 12. The roll unit 9 has one work roll 10 and two backup rolls 1.
2t-The work roll unit 9 of the leveling unit 7 is composed of only one work roll 1, 0. 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 attached to a pair of side frames. la, l
It is placed on a rail 15 installed perpendicularly to the direction of board movement X inside the upper part of a housing l consisting of a housing l, and is movable so that it can be pulled out offline. On the other hand, this upper frame 13'f! : An inverted T-shaped groove is formed in the upper center of the upper frame 13 in order to fix it to the housing 1.Inside this groove, the side frames la and lb are inserted.
The rods of a pair of hydraulic cylinders 16 attached to the cylinders 16 are engaged with each other so that they can be held under pressure. In addition, the lower roll unit of each leveling unit 3 to 7 is attached to the lower frame 17.
Wheels 18 are attached to both ends of the board in the direction of board movement It is connected to a hydraulic cylinder 2° that is capable of pushing out and is installed off-line.
It is driven by extrusion. Further, in order to fix this lower frame 17 to the housing 1, the rods of a pair of hydraulic cylinders 21 attached to the side frames la and lb come into contact with the lower end of the lower frame 17, while the opposing surfaces of the upper frame 13 and the lower frame 17 Support stands 2 each attached to
It can be held by pressing through 2.

On the other hand, the work roll unit 9 at the top of the leveling unit 4, which needs to be replaced the most, can be pulled out offline independently of the upper frame 13 to replace or repair the work roll 10, etc.
is attached to the upper frame 13,
In order to restrict movement in the vertical direction and fix it to the upper frame 13, an inverted T-shaped groove 23a is installed in the upper part of the leveling unit frame 23, as shown in enlarged form in FIGS. 4 and 5.
is formed in the direction perpendicular to the plate material progress, while the upper frame 1
A hydraulic cylinder 24 is attached to 3, and its rod is inserted into the groove 23.
a and can be pressed and held.

In addition, regarding the plate traveling direction When the cylinder 25 is attached, a stopper 26 attached to the tip of the rod can reciprocate along the guide member 27, while the stopper 26 is fitted to the opposing surface of the leveling unit frame 23. A round recess 23b is formed, and the longitudinal and lateral axes of the work roll unit 9 are automatically aligned with predetermined positions by the stopper 26 and the reference surface 13a.

In addition, a rail 28 is installed on the upper frame 13 in a direction perpendicular to the board material traveling direction Wheels 29 are attached to both ends. One side of the tension leveler in the direction perpendicular to the direction of movement of the plate material X, for example, as shown in FIGS. 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 that has been rolled out along the rail 30. In order to lock the work roll unit 9, a stopper 33 with a cushion made of anti-vibration rubber or the like is fixed.

On the other hand, on the opposite side of the tension leveler, that is, on the left side in FIGS. 2 and 3, a rail 34 is attached to the base 31 and is in line with the nine rails 28 installed on the upper frame 13, as on the right side. and a spare wall for replacement.
)9'eA4 leveling unit frame 2
31 is placed, and the upper frame 13 can be mounted. A replacement cart 35 is provided between the rail 34 and the base 31 and is equipped with a spare work roll unit 91 and various devices for replacement work, and is self-propelled by a traveling drive device (not shown). 36, and the exchange trolley 3 is installed to stop and hold it in a predetermined position.
An arm 37 is protruded from the side of 5, and this arm 37
is clamped and fixed by a clamp 39 consisting of a stopper 38 attached to the base 31 and a hydraulic cylinder.

Further, a pair of left and right electric chains 40 are disposed along the rail 36 on the exchange cart 35, and the electric chains 40 are arranged on the left and right sides.
0 and at least the work roll unit 9°9
A pressing head 41 is provided which is horizontally movable by a stroke equal to the entire length of the roll unit 9', and is capable of coming into contact with the rear end surface of the preliminary work roll unit 9'.

It is to be noted that the drive system for the exchange cart and the suppression head is not limited to the above-mentioned method, and any other method such as a cylinder drive method may be used.

When replacing the work roll unit 9 on the upper part 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 to the leveling unit frame 23.
The hydraulic cylinder F 24 is pulled out from the four parts 23b to release the fixed state in the plate material traveling direction X, and then to release the fixed state in the vertical direction of the leveling unit frame 23.
The leveling unit frame 23 is lowered so that the wheels 29 are placed on the rails 28.

Next, a replacement cart 35 and a pre-installed spare work roll unit 9'ffi rail 36 are installed.
The replacement cart 35 is moved along the rail 34 and connected to the rail 28 of the arm 13 at a predetermined position by clamping the arm 37 with a stopper 38 and a clamp 39 made of a hydraulic cylinder. After that, when the electric chain 40 constituting the pushing device is driven to push the preliminary work roll unit 91 with the suppression head 41, the front end surface of the preliminary work roll unit 91 is in line with the leveling unit frame 23 of the work roll unit 9. The work roll unit 9 is transferred to the rail 30 which is in line with the rail 28 while pushing out the work roll unit 9 by contacting the rear end surface, and is positioned on the roll exchange table 32 and is stopped by contacting the stopper 33. As a result, the preliminary work roll unit 9' is stopped at a predetermined position approximately I'L of the upper frame 13. Therefore, the hydraulic cylinder 25 as a fixing device is operated to engage the reference surface 13a of the upper frame 13 and the stopper 26 with the recess 23b, thereby positioning the plate material in the traveling direction 23 is raised along the reference plane 13a to perform vertical positioning. As a result, the preliminary work roll unit 9' is automatically and reliably held in the predetermined assembly center position within the upper frame 13.

After that, the fixed holding of the exchange trolley 35 is released and the exchange trolley 35 is retreated to a predetermined standby position, and the electric chain 401! - Reversing the rotation, the suppression head 41 is also placed in the standby position, and the replacement work is completed.

As is clear from the above description, according to the present invention, the upper work roll unit (9t) of the leveling unit 4 can be easily replaced with a spare work roll unit 9' in a short time, and the line for replacing or repairing rolls 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, since only the work roll unit can be removed offline, the handling size and weight are smaller compared to conventional replacement methods, and the work of reversing the replaced roll unit is also easy, ensuring work safety. There are advantages such as being able to

Incidentally, in the above embodiment, the explanation has been made for the replacement of all the upper work roll units of the leveling unit 4, but the present invention can also be applied to replacement of other upper work roll units and the like.

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 easy, and the work time can be significantly shortened, so the line stoppage time is shortened and productivity is improved. do. Furthermore, the installation accuracy of the work roll unit after replacement is high and no adjustment is required.

[Brief explanation of drawings]

Figures 1 to 5 show an embodiment of the tension leveler of the present invention, Figure 1 is an overall front view along the direction of plate material movement, Figure 2 is a view taken along the line A-A in Figure 1, 3 is a plan view of FIG. 2, FIG. 4 is an enlarged view of main parts, and FIG. 5 is a view taken along the line B--B in FIG. 4. In the drawing, 1 is the housing, 2 is the plate material, 3 to 7 are the leveling units, 9.9' is the work roll unit, 13 is the upper frame, 23.23' is the leveling unit frame, 24.2
5 is a hydraulic cylinder, 26 is a stopper, 28, 30, 34 is a rail, 29 is a wheel, 35 is an exchange trolley, 40 is an electric chain, and 41 is a suppression head. Patent applicant Mitsubishi Heavy Industries, Ltd. Aki, Patent attorney Shibe Mitsuishi (and one other person)

Claims (1)

[Claims] 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 of plate movement, the upper work roll unit separated on the upper frame is arranged in the direction of movement of the plate. A fixing means is provided for movable along a rail installed in the upper frame in a perpendicular direction and for fixing the upper work roll unit at a predetermined position in the upper frame, and A linear upper work roll unit evacuation rail connected to the rail is laid on one outer side in the right angle direction, while a spare work roll unit is placed on the other outer side and is moved. A rail for feeding the preliminary work roll unit is laid in a straight line and is connected to the rail installed in the upper frame. A tension repeller characterized by being provided with a pushing means for retracting a roll unit.