JPH0255620A - Roller leveler - Google Patents

Abstract

PURPOSE:To uniformize the flatness in the width direction and to improve the quality of a product by arranging a device for uniformizing tension in the width direction of a band plate on an inlet side of a roller leveler. CONSTITUTION:The device for uniformizing tension in the width direction rolls down the right or left of the band plate 1 in order to uniformize the tension in the width direction according to the measured result by the tension detector 16 for both lug parts of the band plate 1 at the preceding stage. As a result, since the roller leveler 2 rolls down one end under a tension by a rolling down roller 7 arranged at the inlet side of the roller leveler 2, the flatness in the width direction of the band plate 1 is uniformized and the band plate 1 under uniformized tension enters the roller leveler 2 to manufacture the band plate 1 uniform in flatness all over the surface and to improve the product quality. Besides, cut down loss to be adjusted is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a roller leveler, and particularly to a device effective for equalizing the tension in the width direction of a strip plate on the entrance side of a roller leveler.

[Prior Art] Conventionally, there is a roller leveler as a device for adjusting the shape defects of metal strips (hereinafter referred to as "strips") such as steel, stainless steel, and aluminum plates. A roller leveler alternately pinches and conveys a strip between multiple small-diameter rollers (called work rollers) from above and below, repeatedly bending the strip to plastically deform the skin of the strip, reducing the internal stress of the entire strip and dividing it into smaller pieces. This equipment is used to flatten the strip.

As shown in FIGS. 5(a) and 5(b), in order to give sufficient plastic deformation to the strip plate 1 at roller level 9λ, an intermediate roller 4. The back-up roller 5 applies pressure to flatten the strip 1. 6 is a bearing housing. In such flattening, the amount of reduction must be changed depending on factors such as the material, thickness, and machine of the strip.

In addition, in the roller leveler line, the strips are joined by a joining device equipped with a cutting device that cuts the strips in the width direction before the roller leveler.

In roller levelers, devices for cleaning work rollers (for example, Utility Model Application No. 61-9122, Utility Model Application No. 58-3)
8318 and Japanese Utility Model Application Publication No. 59-99022), a work roller replacement device (see Japanese Utility Model Application Publication No. 56-91620), and a wet leveling method in which cleaning liquid is supplied during the adjustment process to reduce the occurrence of scratches. Methods for measuring this (see Japanese Unexamined Patent Publication No. 117157/1983) have been researched and disclosed.

In addition, the present applicant has also filed Japanese Patent Application Nos. 62-28342 and 62-28342.
-No. 28343, Patent Application No. 131508/1983, No. 62
-131509.

Improvements such as the same No. 131510 are proposed.

[Problems to be Solved by the Invention] This is fine for the running direction of the strip, but due to differences in thickness in the width direction of the strip, bending of the strip itself, and poor joining by the joining device, etc. If non-uniform tension occurs in the width direction of the strip, this will cause non-uniform internal stress in the width direction of the strip, resulting in different flatness of the strip in the width direction.

In particular, photosensitive materials for planographic printing machines (hereinafter referred to as PS plates)
For aluminum strips used in manufacturing, uneven flatness in the width direction of the strip is a serious problem in terms of product quality, especially in relation to sheet meandering during the plate-making process, and it also has a negative impact on yield during the manufacturing process. This was a contributing factor to the decline.

On the other hand, in a roller leveler, a method is used in which the artificial side of the roller leveler is made into a free loop to correct for uneven tension, but the free loop on the artificial side causes meandering of the plate. This has been a cause of surface angle defects, medium dimension defects, etc. when slitting or cutting is performed downstream of the roller leveler.

The purpose of the present invention is to solve the above-mentioned problems by making the tension distribution uniform in the width direction of the strip, making the internal stress uniform in 11 directions of the strip, and improving the yield by making the flatness uniform. The present invention provides a roller leveler equipped with a tension equalization device.

[Means for solving problems]

The above-mentioned object of the present invention is to provide a tension equalization device in the width direction of a strip, which is provided on the inlet side of a roller leveler, and comprises: - a wooden rolling down roller; and a mechanism capable of rolling down by raising and lowering one side of bearings at both ends of the rolling roller; This is achieved by a roller leveler that is characterized by the following:

In the present invention, one rolling roller for PS plates preferably has a diameter of about 50 to 250 mrn, and the roller core is preferably made of carbon steel 345C, 535C, etc. for mechanical structures. The surface is preferably made of rubber for rollers, especially urethane rubber. The surface hardness is preferably JIS 60 to 90'.

In the present invention, angular contact ball bearings are used for both bearings of the reduction roller because they move up and down relative to each other.

In the present invention, the mechanism that allows rolling down by raising and lowering one side of the bearings at both ends of the rolling roller is limited to the mechanism that can roll down the strip by raising or lowering only the left or right bearings independently. The mechanism is not limited to this, but when the left bearing of the roll-down roller goes up, the right bearing is lowered, and in the opposite case, the mechanism moves in a relative opposite manner.The movement of the roll-down roller applies pressure to the strip and flattens it in the width direction. It also includes a mechanism for correcting the degree.

As a mechanism for raising and lowering the bearing, either a hydraulic method or a mechanical method may be used.

Embodiments of the present invention will be explained using FIGS. 1 and 2.

In FIG. 1, an 11-direction tension equalizing device having one roll-down roller 7 is disposed on the inlet side of the roller level 72.

FIG. 2 is a front view of one embodiment of the [1] direction tension equalizing device of the present invention. - As an embodiment of a widthwise tension equalizing device having a mechanism that can lower the wooden rolling roller 7 and the bearings 8a and 8b at both ends of the rolling roller 7 by raising and lowering one side of the bearings 8a and 8b, respectively. bearing stands 9a and 9b for receiving;
A power transmission gear box lOa is provided at each end to support and raise and lower the bearing stands 9a and 9b.

10b, and a rotary shaft 13 having gear boxes loa and 10b at both ends of the shaft 13 and a power transmission clutch 14 in the center. be.

In this case, horizontal bearing stands 9a, 9 are used as ball screws Ila, llb that support and raise/lower the bearing stands 9a, 9b, and have power transmission gear boxes 10a, 10b at their ends.
Preferably, ball screws lla and llb are set perpendicular to b. The threads of the ball screws lla and llb affect the lifting speed when the bearing stands 9a and 9b of the roller leveler roll down one side, so the i1! It is determined so that it can correspond to the quality and speed. Also, the positions of the power transmission gear boxes 10a and 10b are ball screws lla and llb.
It can be either above or below the end.

Further, the gear boxes 10a and job are located at both ends of the rotating shaft 13, and have a power transmission clutch 14 in the center thereof, and a disk clutch is used as the clutch 14.

It can also rotate in forward and reverse directions, so a wet multi-disc clutch is used.

[Function] The present invention provides a device for equalizing the tension in the width direction of the strip plate on the entrance side of the roller leveler, thereby equalizing the tension in the width direction before the strip plate enters the roller leveler.
At the exit of the roller leveler, it is intended to obtain a strip having uniform flatness in both the IJ force direction and the traveling direction.

When the tension in the width direction is uniform, the width direction tension equalizing device of the present invention uniformly rolls down the strip plate in a horizontal state.

However, for example, when the tension on the right side of the strip is higher than on the left side, it is necessary to reduce the tension on the left side to equalize the tension on the right and left sides.

In this way, the width direction tension equalizing device lowers the left or right side of the strip in order to equalize the tension in 11 directions according to the measurement results of the tension measuring device at both ears of the strip at the front stage of the device. multiply. For example, in the above case, when the clutch 14 turns toward the front and rotates from top to bottom to transmit power, the right ball screw llb rotates from left to right, so the right bearing stand 9b
is descending. At this time, the left ball screw Ila raises the left bearing stand 9a. That is, the rolling down roller 7 is tilted downward to the right at twice the speed relative to the left and right, so that rolling on the right side acts on the band plate 1, and acts to equalize the uneven tension on the left and right sides.

Here, the tension of the strip is determined by a tension detector 16 installed on the inlet side of the rolling roll rough to detect the tension on each of the right and left sides, and to equalize the tension in the width direction according to the measurement results. Apply pressure to the left or right. When the tension is uniform in the width direction of the strip, the rolling down roller 7 is set at a position so that the rolling down on the left and right sides is equal, and when the tension is uneven in the width direction, the rolling down roller 7 is set to a setting value corresponding to the uneven tension. or -i
If the tension is tentatively uniform in the width direction, it may be moved to a position where it does not touch the strip, or it may be rolled down against the strip only if unevenness occurs. That is, only when the tension of the strip plate becomes uneven in the width direction, the right and left rolling reductions may be changed to make it uniform.

In this way, the roller leveler of the present invention uniformizes the flatness in the width direction of the strip by rolling down one end with tension using the rolling roller ruff disposed on the inlet side of the roller leveler.
Since the strip with uniform tension in the width direction enters the roller roller, a strip with uniform flatness over the entire surface is produced, improving product quality. In addition, the amount of cut-off loss due to adjustment, which has been required up to now, will be reduced, and the profit margin will be improved.

〔Example〕

One embodiment of the present invention will be described. However, the present invention is not limited to this example.

Using a width direction tension equalizing device as shown in FIG. 2, the diameter of the rolling roller is 150111. Using a roller core metal of 345G, surface material of urethane rubber, and surface hardness of JrS85±3, the first
Installed on roller leveler l in the arrangement shown in the figure, plate thickness 0.3m
The tension of an aluminum strip with a strip width of 1000 mm was adjusted.

Then, a strip-shaped sample, length X = 600 mm, width Y-3
(I made a 1 m long piece and measured and compared the curvature.

Conventionally, with the curvature shown in Figure 3, the curvature on the left and right sides of the strip exceeded the standard value limit, and adjustment required cutting off and loss. As shown in FIG. 4, both the curvatures of the left and right ends were within the standard values, and the yield was improved.

However, what does curvature mean? As shown in Figure 6, a test piece is made by cutting an aluminum strip into a strip with a predetermined length of X in the running direction and Y in the width direction of the strip. One side as the bottom, Y
When the strip is propped up on a surface plate with the sides pointing in the height direction, the strip shows its natural curled state. At that time, the X side shows the length l, and the curling depth shows h. This l and h are measured and this 1/ρ is called the curvature. Here, the positive and negative signs are positive when the top surface of the 28th plate of the strip is convex, and negative when the top surface is concave. In addition, to measure the curvature of an aluminum strip for 25 plates of 0.1 to 0.5 mm, the length of a strip test piece is X ~300 to 800 rto, and the width Y is 15 to 50 m.
m is desirable.

In addition, in the past, the tension became uneven due to poor bonding at the joint, and the flatness of the joint was reduced to less than 2m in each front and back of the joint, but this has been reduced to less than 2m in the front and back of the joint. The incidence of flatness defective products due to uneven tension due to distribution and bending of the strip itself has decreased from 1.2% to 0. It was 3%, which led to an improvement in the profit margin.

[Effects of the Invention] According to the present invention, the tension distribution in the width direction of the strip plate is made uniform, the flatness in the width direction is made uniform, and product quality is improved, and the yield and production efficiency are improved by the present invention. The effect is large.

[Brief explanation of the drawing]

Fig. 1 is a side view of one embodiment of the roller leveler of the present invention, Fig. 2 is a front view (a) and side view (b) of one embodiment of the width direction tension uniformity device used in the present invention, and Fig. 3 4 is a state diagram of the curvature in the width direction of a conventional strip plate, FIG. 4 is a state diagram of the curvature in the width direction according to the present invention, and FIG. 5 is a side view (a), a front view (b), and FIG. 6 is a perspective view showing a method of cutting a strip (a) 5 and a method of measuring curvature (b) for performing the curvature measurement method. ■ ・ ・ ・ Band + anti-l... Roller leveler 3... ・Work roller 4... Intermediate roller 5... Bank up roller 6... Bearing housing 7... Rolling down rollers 8a, 8b... Bearing 9a, 9b...Bearing stand 10a, fob...Gear box 11a, llb...Ball screw 12a, 12b...Slide guide 13...Rotating shaft diagram

Claims (1)

[Claims] On the inlet side of the roller leveler, a device for equalizing the tension in the width direction of the strip is installed, which consists of a roll-down roller and a mechanism that can roll down the roll by moving one side of the bearings at both ends of the roll-down roller up and down. Features a roller leveler.