JPH02299703A - Method for cold-rolling metal - Google Patents

Abstract

PURPOSE:To smoothly manufacture a metallic sheet or a metallic foil as restraining a herring bone by passing a cleaning stage for cleaning the surface of stock being rolled and a watering stage and then rolling the stock being rolled. CONSTITUTION:The rolled stock 14 coiled round a delivery means 12 passes a rolling mill 11 through the cleaning device 20 and the watering device 30, then, is coiled by a coiling means 13 and rolled. At this time, the cleaning device 20 drives unwinding reels 25,26 and winding reels 27,28, delivers a little amount of wiping members 23,24 and wipes the stock 14 being rolled with new surfaces. Further, solvent is supplied to the wiping members 23,24 to degrease the surface of the rolled stock 14. Furthermore, the watering device 30 injects the steam from a steam generator 32 and water fine particles from an ultrasonic humidifier 33 from an atomizer 31 to the surface of the rolled stock 14 sticks water uniformly to the surface, then, the rolled stock is moved to the rolling stage by the rolling mill 11 to roll the metallic sheet or the metallic foil.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a cold rolling method for producing a metal plate or metal foil, and particularly relates to a pretreatment process for supplying a material to be rolled to a rolling mill. Regarding improvements.

(Background Art) Metal plates or metal foils such as aluminum or aluminum alloy (hereinafter abbreviated as aluminum) are widely used, and
With the expansion of applications, even higher quality is desired.

In general, the thickness of cold-rolled metal becomes thinner as the rolling load increases, so increasing the rolling load will improve the rolling degree and production efficiency. The higher you go, the more money you get! Damage occurs on the surface of A foil, so-called herringbone.
There was a problem in that it was easy for this to occur.

On the other hand, when the rolling load is lowered to minimize or eliminate herringbone, a new problem of roll slip occurs, resulting in defective products. Also, these herringbone and roll slip problems are
Although it can be reduced to some extent with rolling oil,
The problem could not be solved by simply improving the rolling oil.

For this reason, in the conventional metal cold rolling method, the properties of the material to be rolled, rolling reduction (rolling degree), EEA+1 load, rolling speed, properties of the rolling oil, equipment specifications such as the rolling mill and material supply device, etc. It was carried out arbitrarily and individually by weighing various conditions.

[Problem to be solved by the invention]

However, setting conditions by comparing and considering various conditions as described above not only requires a lot of time to take countermeasures, but also requires skill to take countermeasures, and reviewing the rolling conditions each time reduces productivity. There are drawbacks that make it worse. Furthermore, when appropriate conditions among the above conditions are used as parameters (variables), the relative relationship between this parameter and the occurrence of herringbone is unknown, so for example, if the rolling load and rolling speed are kept constant, In some cases, there has been a strong demand for the establishment of technical guidelines that can reduce or eliminate herringbone by varying specific parameters.

For this reason, as a result of intensive research on this point, the applicant has found that by adding a moisture addition process before the rolling process, the occurrence of fringe can be reduced or completely eliminated without being significantly affected by other conditions. Found a method j2 and applied patent overlay (see JP-A-63-157702)
However, subsequent research has shown that simply adding moisture may not always be sufficient to prevent the occurrence of herringbone, and a method that can more completely suppress the occurrence of herringbone has been desired.

An object of the present invention is to provide a method for cold rolling metal that suppresses the occurrence of herringbone and has high productivity. It was discovered that the herringbone is caused by uneven adhesion of moisture to the rolled material, and that the uneven adhesion of moisture is due to dirt on the surface of the rolled material. It was discovered and done.

That is, the present invention is characterized in that a cleaning step for cleaning the surface of the material to be rolled is added before the moisture addition step.

In this cleaning step, cleaning of the surface of the rolled material preferably includes a degreasing treatment, since removing dirt such as oil and fat attached to the rolled material greatly contributes to uniform adhesion of moisture.

[Effect]

In the present invention configured as described above, the surface of the rolled material that has been cleaned through an appropriate cleaning process such as degreasing treatment,
Moisture adheres uniformly during the moisture addition process. When rolled in this state, a metal plate or metal foil can be smoothly manufactured without herringbone formation.

[Example] Hereinafter, an example in which the metal cold rolling method according to the present invention is applied to the production of metal foil will be described in detail with reference to drawings showing a suitable apparatus for carrying out the method. .

This embodiment is a cleaning device f for carrying out a cleaning process.
20 and a moisture addition device 3 for performing the moisture addition step
The process is carried out in a cold rolling mill 10 shown in the figure marked with 0.

The cold rolling apparatus 10 is a four-stage reversible type rolling machine having a pair of work rolls tIA and hiba nkuanfu rolls IIB, and is arranged before and after this rolling machine 4111,
In cooperation with the rolling mill 11, for example, the tension on the auxiliary side of the material to be rolled 14 is set to 5 kg/m d, and the tension on the rear side is set to 3 kg.
/ m rd, and a winding means (take-up reel) 13 for winding up the rolled metal foil 15.

Here, the rolled material 14 is pure aluminum H for aluminum foil rolling.
113 (JIS) + 40DO), width 60+w
.

It is a thin long strip with a thickness of 0.1 m. Also,
As the rolling oil, water-insoluble Daphne Oil AL-35 (manufactured by Idemitsu Kosan Co., Ltd.) is used.

By the way, the cleaning device f 20 includes wiping rolls 21 . 22, and these wiping rolls 21.
The wiping members 23 and 24 are wound around the middle part of the wiping member 22 and are brought into contact with the surface of the rolled material 14, and these wiping members 23 and 24.
unwinding reel 25.26 and take-up reel 27.28
It is composed of:

The wiping members 23 and 24 are flexible materials such as cloth made of cotton, hemp, or other fibers, nonwoven fabric, paper, leather, or other materials, and are used to wipe away dirt on the surface of the rolled material 14. It is constructed from materials that can be used.

Further, these wiping members 23 and 24 are supplied with a solvent such as gasoline or alcohol or water from a solvent or water supply means (not shown) as necessary. Therefore, when a solvent is supplied to the wiping members 23 and 24, a degreasing process can be performed to dissolve and remove the fats and oils adhering to the surface of the rolled material 14.

Further, suitable drive means are connected to the unwinding reel 25.26 and/or the take-up reel 27.28, so that the wiping member 23.24 can be transported intermittently or continuously. Further, the wiping roll 21 facing the rolled material 14 is swingably supported by an unillustrated device fixing part via an arm 29, so that it can follow changes in the winding diameter of the wound portion. It is being done.

The moisture adding device 30 includes a spraying device 31 that applies steam and moisture particles to both surfaces of the rolled material 14, a steam generator 32, and an ultrasonic humidifier 33.
Moisture supply device 3 that supplies steam and moisture particles to 1
4.

In this embodiment configured in this way, the rolled material 14
To obtain metal ff115 by rolling, the following procedure is performed.

The rolled material 14 wound around the delivery means 12 is transferred to the cleaning device 2
After passing through the rolling mill 11 through the water addition device 30 and the water addition device 30,
The material is wound by the winding means 13 and a predetermined tension is applied thereto. In this state, a predetermined reduction blade is applied by the rolling mill 11, and the delivery means 12 and the winding means 13 are driven to carry out rolling. .

During this rolling, both surfaces of the material to be rolled 14 are cleaned by the cleaning device 20 (cleaning process), then moisture is added by the moisture adding device 30 (moisture adding process), and the rolling material 14 is sequentially smoothed by the rolling mill 11. It is rolled into metal F! 15.

In the process of cleaning the rolled material 14, the cleaning device 20 wipes the rolled material 14 for a certain length and then drives the unwinding reel 25.26 and/or the take-up reel 27.28 to wipe the rolled material 14. A small amount of the members 23, 24 is fed out to wipe the rolled material 14 with a new surface. Further, by supplying the solvent to the wiping members 23 and 24, the surface of the rolled material 14 is degreased.

Furthermore, the water supply by the moisture adding device 30 is performed by spraying steam from a steam generator 32 and fine water particles from an ultrasonic humidifier 33 onto the surface of the rolled material 14 from the spray device 31. The moisture injected from the rolling mill 11 is evenly and uniformly adhered to the surface of the cleaned material to be rolled 14, and the material to be rolled 14 to which this moisture has adhered is transferred to the rolling process by the rolling mill 11 and rolled. is made and wound up by the winding means 13.

According to this embodiment as described above, there are the following effects.

That is, in this embodiment, a cleaning process is provided before the moisture adding device 30 to clean the surface of the rolled material 14, and then moisture is applied by the moisture adding device 30, so that the rolled material 14 Moisture can be uniformly attached to the surface of the material 14, and therefore, a high quality metal foil 15 can be manufactured without causing damage such as herringbone on the metal M15 after rolling. Further, the presence of moisture, together with the use of rolling oil, allows smooth rolling operations.

Furthermore, the cleaning device 20 that performs the cleaning process includes a wiping member 23
．． 24, and these wiping members 23 and 24 are configured to create a new surface each time the rolled material 14 is wiped for a predetermined length, so that a sufficient cleaning action can be performed with a always clean surface. Further, by impregnating the wiping members 23, 24 with a solvent, more complete cleaning including degreasing can be performed. Moreover, since the cleaning device 20 has a simple configuration, it can be manufactured easily and at low cost.

Furthermore, the cleaning device 20 and the moisture adding device 30 used in this embodiment can be easily incorporated into a conventional rolling mill, and have the advantage of being extremely versatile.

Next, specific experimental examples conducted to confirm the effects of this example will be explained with reference to comparative examples.

In this experiment, as described in the previous embodiment, cleaning devices 20 and 1 equipped with wiping rolls 21, 22, etc., and a moisture adding device 30 that supplies steam and fine particles of water were installed on the inlet side of the rolling mill 11. and these devices were used as required.

In addition, the rolling mill, rolling material, and rolling oil used are as follows.

Rolling machine used: Reversible 4-high rolling mill Backup roll diameter: φ200 area Work roll diameter: φ401 Surface roughness RmIIx O, 6 μ rolling crown 0.02 am Rolling material: Pure aluminum for aluminum foil rolling (thickness 0 .1 M, width 60 m) Sho Nobu Oil: Daphne Oil AL-35 (manufactured by Idemitsu Kosan ■) - Soak the solvent (cleaning gasoline) into the wiping members 23 and 24, apply it to the material to be rolled 14, When the moisture adding device 30 is used after wiping off oil on the surface of the rolled material.

y-J! ! , 2- Apply the wiping members 23, 24 directly to the material to be rolled 14 without soaking any solvent or the like, and drive the wiping members 23, 24 so that a new surface comes out every 10m of rolling to remove oil. When the moisture adding device 30 is used after wiping off.

Jj;, -9L! IL↓, - When only the 2 moisture adding device 30 is used without using the cleaning device t20.

The experimental results from the above experiments are shown in Table 1.

Table=1 According to the above experiment, after cleaning the surface of the rolled material 14 by impregnating the wiping members 23 and 24 of the cleaning device 20 with a solvent as shown in Example 1, the water adding device 30 was used to clean the surface of the rolled material 14. It can be seen that by applying moisture, a normal surface texture can always be obtained regardless of the magnitude of the rolling load.

At this time, it goes without saying that the greater the rolling load, the thinner the rolled metal foil 15 can be.

Furthermore, as shown in Example 2, even if a solvent is not used, if the cleaning device 20 and the moisture adding device 30 are used, minute herringbones may occur depending on the rolling load, but It can be seen that the metal foil 15 with almost normal surface texture can be obtained.

On the other hand, as shown in Comparative Example 1, when the clean bag 7i'20 is not used at all and only the moisture adding device 30 is used,
The occurrence of herringbone is significant, the quality is extremely low, the F is large, and the product cannot be used.

Therefore, the use of both the cleaning device 20 and the moisture adding device 1f30 is important in obtaining high quality metal foil 15,
It is also understood that degreasing the surface of the rolled material 14 using a solvent in the cleaning device 20 is important for stabilizing quality.

Note that the present invention is not limited to the above embodiments,
Modifications within the scope of achieving the object of the present invention are included in the present invention.

For example, although the cleaning device 20 in the above embodiment has been described as having a configuration including a wiping roll 21, 22, a wiping member 23, 24, etc., the cleaning device 20 is not limited to this, and may be configured as a solvent tank. The material to be rolled 14 may be immersed in this solvent bath and passed through it.Furthermore, although two wiping rolls 21 and 22 are used, one or three or more wiping rolls may be used. The members 23 and 24 are not limited to tape shapes, and may be attached to the entire surface of the wiping roll 21.22.
It is preferable to provide a cleaning means or the like for removing oils and fats adhering to the wiping member at a portion of the wiping member attached to the wiping member 22 that is separate from the portion that contacts the rolled material 14 .

Further, the moisture adding device 30 is not limited to one that applies both steam and water particles, but may be one that applies either one, and its configuration is not limited to that of the above embodiment,
The device shown in JP-A-63-157702 or other devices capable of applying moisture may be used.

Further, in the above embodiment, the manufacturing method for obtaining the metal foil 15 by rolling the material to be rolled 14 was explained, but the present invention is not limited to this, and can be directly applied to the manufacturing method for obtaining the metal plate. . However, since the influence of herringbone is greater in the production of metal foil than in the case of metal plates, it can be said that applying the present invention to the production of metal foil is more effective. Further, although the material to be rolled 14 is made of aluminum, the present invention is not limited thereto, and can be widely applied to metals for manufacturing metal plates or metal foils, such as copper materials.

(Effects of the Invention) According to the present invention as described above, metal plates and metal foils can be produced stably and with high quality while suppressing the occurrence of herringbone, and productivity can be dramatically improved. effective.

[Brief explanation of drawings]

The figure is an overall configuration diagram schematically showing an embodiment of an apparatus for carrying out the method for cold rolling metal according to the present invention. 10...Cold rolling equipment, 11...Rolling mill, 14...
- Rolled material, 15... Metal foil, 20... Cleaning device,
21°22... Wiping roll, 23.24... Wiping member, 30... Moisture adding device.

Claims (2)

[Claims] (1) In a metal cold rolling method in which a metal plate or metal foil is produced from a rolled material through a rolling mill, the rolled material is passed through a surface cleaning step, then a moisture addition step, and then A method for cold rolling metal, characterized in that the material to be rolled is rolled through the rolling mill. (2) The method for cold rolling metal according to claim 1, wherein the cleaning step includes a degreasing treatment.