JP3411612B2 - Metal strip frame processing apparatus and processing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for annealing and degreasing a metal strip after rolling (in the present invention, a metal strip means a metal foil or plate having a thickness of 5 μm to 3 mm). The water wettability and the uniformity of surface properties such as oxide film in the width direction and length direction of the strip are high, and the combustion capacity can be controlled easily and reliably in conjunction with the processing speed for highly productive flame processing. The present invention relates to a frame processing device and a processing method thereof.

[0002]

2. Description of the Related Art Many metals are relatively inexpensive and have excellent mechanical suitability for their price. Therefore, they are inexpensive conductive materials and, in the case of precious metals, have excellent chemical corrosion resistance and decorative properties. Therefore, it is widely used as an industrial material and an electric material.

Especially in the fields of packaging materials, electrical materials, daily necessities, ornaments, industrial materials, etc., a large amount of metal foil (about 5 μm to 200 μm) or metal thin plate (about 200 μm to 3 mm) is used for this purpose. Being produced.

These metal strips are generally slab-shaped metal that is rolled using a roll, but the surface after rolling is covered with rolling oil used during rolling, and the metal strips for printing, lamination, etc. Often an obstacle to secondary processing. For this reason, it is usual to anneal the rolled metal strips for degreasing (removal of rolling oil). Usually, it is often done with the metal strip wound in a coil, but it was not without frame treatment.

In this case, when the material of the metal strip is a metal having a relatively high melting point such as iron, it does not matter so much, but when it is a metal having a relatively low melting point such as aluminum, copper or alloys thereof, degreasing is performed. In some cases, softening of the material due to annealing and annealing progresses at the same time, and degreasing may cause excessive softening of the metal.

Especially in the frame processing, the number of metal strips is 1.
Since degreasing and annealing are performed by contact with a flame at a temperature of 000 ° C to 1500 ° C or higher for an extremely short time, control of the running speed of the metal strip and the heating capacity of the burner is insufficient due to a slight error. It causes troubles such as excessive annealing. Because of this, non-uniformity in the width direction of degreasing, the so-called batch annealing that is annealed while wound in a coil shape that has a problem such as requiring a long time becomes the mainstream, the uniformity of the surface characteristics in the width direction and the length direction, Despite some excellent features such as high productivity,
It seems that the reason was that annealing degreasing by flame treatment was not carried out very often except for special cases.

However, although various measures have been taken for the nonuniformity of the metal strip surface characteristics in the width direction and the low productivity due to the batch annealing, this problem is a basic one, and its solution is solved. Is extremely difficult.

The present invention therefore seeks to improve a flame treatment method which has the advantages of uniform surface properties, high productivity and the like.

[0009]

DISCLOSURE OF THE INVENTION The present invention aims to make a heating amount per unit area of a metal strip as uniform as possible even if the traveling speed of the metal strip changes as a condition when the high temperature frame comes into contact with the metal strip. It is an object of the present invention to develop a frame processing apparatus for metal strips equipped with an appropriate control means capable of controlling degreasing and annealing and a frame stripping method for metal strips.

[0010]

According to the present invention, (a) a roll whose surface temperature can be adjusted (b) a burner for frame treatment on the roll surface (c) a traveling speed detector of a metal strip (D) A control means for receiving a signal from the detector and automatically controlling the distance between the burner and the metal strip traveling on the roll surface according to the traveling speed of the metal strip. In the frame treatment device for metal strips and the frame treatment for annealing and degreasing metal strips, the traveling speed of the metal strips is detected, and the distance between the metal strip and the burner traveling on the roll surface is detected accordingly. The above object was achieved by developing a frame treatment method for metal strips, which is characterized by automatically controlling the degreasing and annealing.

The metal strip to which the present invention is applied is a soft, low-melting metal such as aluminum, copper or an alloy thereof; a noble metal such as gold, silver or platinum; a relatively hard or high metal such as iron or stainless steel. Rolled metal foil (5 to 200 μm or so) of melting point metal, thin metal plate (200 μm)
-3 mm). Particularly, it is preferably used for a metal strip of a soft low melting point metal or a noble metal.

The present invention will be described below by taking an aluminum strip as a representative, but the aluminum strip may be pure aluminum for general industry (including electrolytic aluminum and ordinary pure aluminum) or an aluminum alloy, particularly There is no limit. Although the thickness of the aluminum strip is not particularly limited, it is generally about 5 μm to 3 mm.

The frame treatment is a separator in the rolling process,
Where a single aluminum strip such as a slitter is running (especially when two thin foils are rolled and rolled), or during the process from the separator, slitter, etc. to the aluminum strip winder Can be performed by a frame processing device provided in any of the lines, or a coiled aluminum strip wound after passing through a separator, a slitter, etc. can be performed in a process of installing an offline frame processing device different from the line. . Ease of operation,
When considering productivity, it is easier to use the inline method at once.

FIG. 1 shows an example of a flow sheet of the apparatus of the present invention.

The frame processing apparatus of the present invention is, for example, as shown in FIG. 1 (for single-sided processing) when the rolled aluminum strip is separated and the material wound on the roll is subjected to the frame processing.

The aluminum strip (1) wound into a roll is supplied to a bridle roll (4) provided with a burner (3) via a dancer roll (2). The bridle roll (4) is a motor (not shown).
The aluminum strip is wound around more than about half of the circumference of the roll with the help of other tension reels. The roll is cooled by circulating cooling water or the like.

The burner (3) is a bridle roll (4)
Slightly away from, the aluminum strips (8) on the roll surface are provided to blow the frame. Here, the aluminum strip whose surface has been heated and oil has been incinerated is cooled by the cooling roll in contact therewith, and is also cooled after leaving the frame, so that the annealing of the aluminum strip is prevented. Next, the aluminum strip (8) from which oil has been removed is wound in a roll shape by a winder (9) via rubber rolls (5) for preventing wrinkles, bridle rolls (6), auxiliary rolls such as tension reels (7). Taken.

In this case, the running speed of the aluminum strip is set at a place where the running speed on the bridle roll (4) for frame processing can be measured, that is, the final roll of the dancer roll (2) in FIG. 4) It may be on the surface of the bridle roll (4) as long as it indicates the traveling speed above, or anywhere thereafter until the winder (9).

In this way, the running speed of the aluminum strip is detected, the take-up speed, the amount of rolling oil adhered, the amount of residual oil after the flame treatment (usually indicated by the contact angle with water, etc.), and the target. Depending on the degree of annealing, the distance between the surface of the bridle roll (4) and the burner (3) is automatically controlled to perform appropriate heating. The fuel is preferably heated by gas or liquid fuel. The means for controlling the distance between the roll surface and the burner is
For example, a combination of a rack (13) and a pinion (14) is possible. That is, a signal from the controller may be input to the pinion (14) connected to the motor, and the burner (3) connected to this may be moved up and down to adjust the distance between the pin and the metal strip.

At this time, the burner may have a constant calorific value at all times, or may be a burner whose combustion capacity is changed so that a plurality of calorific values (fuel supply amounts) can be obtained stepwise.

In the above description, a single-sided processing device was shown, but if a bridle roll with adjustable temperature and another set of frame burners are provided so that the other side of the aluminum strip can be processed, the double-sided frame processing will be performed. Can be done all at once.

Although the bridle roll (4) has been described as being cooled, it should be a device that can produce a semi-hard or soft aluminum strip in one pass when it is used as a heating roll such as circulating heating oil or enclosing an electric heater. You can

In the above description, the aluminum strip which has been separated and wound up has been described. However, the frame processing device is incorporated in a separator or a slitter, or installed in a line between the separator and the slitter, and Of course, continuous processing may be performed.

In the flame treatment of the present invention, the type of metal, the calorific value of the burner, in this case the thickness of the aluminum strip, the type of rolling oil and the amount of residual oil, the target contact angle of the aluminum strip with pure water. Generally, high-speed processing of about 100 to 1000 m / min is possible, though it depends on whether it is in-line or offline.

Prior to the frame treatment, the type of rolling oil adhering to the aluminum strip, the amount of rolling oil deposited, the aluminum material of the intended product aluminum strip, the mechanical strength, the thickness of the strip, and the target aluminum strip. Since the energy supplied per area changes depending on properties such as the contact angle with water, it is preferable to measure it experimentally. A small amount of degreasing may be required when sufficient annealing is performed in another annealing step. Separately, when an aluminum strip with high mechanical strength is required, sufficient rolling oil removal is required only by flame treatment. Because.

Generally, the aluminum strip after frame treatment has a contact angle with water of 70 ° or less, preferably 60 °.
If it is less than the following, it will be an aluminum strip that does not hinder normal use, so it is necessary to perform frame processing within this numerical range as a target.

The amount of heat supplied as a frame also varies depending on various conditions, but in general applications it is about 0.1-10.
kcal / m ² (one side), which is slightly higher than this value, especially when it is desired to increase the degreasing degree.

The temperature of the cooling roll is also a target product. The rigidity of the aluminum strip, the burner capacity, the aluminum strip thickness,
It varies depending on the traveling speed and the like, but is not limited to about 40 ° C or less for a rigid strip, about 180 to 300 ° C for semi-rigid,
When it is soft, it is about 250 to 600 ° C. If the obtained aluminum strip is harder than the target rigidity, the roll temperature may be raised, and if it is soft, the roll temperature may be lowered.

Of course, it is also possible to once manufacture an aluminum strip having a rigidity higher than the target, and perform annealing in combination with the conventional batch annealing (the aluminum strip is annealed while being rolled). At this time, degreasing in the flame treatment is not required to be complete, and the time required for batch annealing can be significantly shortened.

[0030]

The present invention, when annealed and degreased a rolled metal strip, is a frame-treated degreaser excellent in the uniformity of surface characteristics (degreasing and oxide film formation) in the width direction and the length direction and in productivity. In order to perform frame processing without insufficient or excessive annealing, the running speed of the metal strip is detected, the required heating amount is calculated, and the signal controls the distance between the metal strip and the burner. A method of controlling degreasing and annealing was adopted.

In the conventional device, the heating pipe having the combustion ability adapted to the traveling of the metal strip at the top speed is used, and the heating amount is controlled by manually adjusting the fuel supply amount except the top speed. , I couldn't make precise adjustments. The present invention overcomes this by controlling the distance between the metal strip and the burner that travel according to the traveling speed of the metal strip and controlling the heating amount.

[0032]

The conventional metal strip frame processing device does not have a mechanism for automatically and appropriately controlling the heating amount for the metal strip according to the traveling speed of the metal strip, and the fuel supply system is manually operated according to the line speed. It was the current situation to adjust.

Therefore, when the frame treatment is performed from the beginning of winding the metal strip coil, the portion of the winding start with a slow speed tends to be over-framed, and the surface condition becomes uneven in the length direction of the metal strip. It was easy to become.

The present invention is characterized by detecting the traveling speed of the metal strip and automatically controlling the distance between the metal strip and the burner by this output to control the heating amount, and is a feature of the flame treatment. The uniformity of surface characteristics in the width direction and the length direction and high productivity could be secured.

Further, by performing the flame treatment on a roll whose surface temperature can be adjusted, the annealing can be adjusted to some extent independent of degreasing.

[Brief description of drawings]

FIG. 1 shows an example of a single-sided processing device.

[Explanation of symbols]

1 Payoff 2 dancers roll 3 burners 4 bridle rolls 5 Wrinkle prevention roll 6 bridle roll 7 Tension roll 8 metal strip (aluminum strip) 9 Winder 11 Running speed detector 12 Controller 13 racks 14 pinion

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-35730 (JP, A) JP-A-63-282244 (JP, A) JP-A-6-33203 (JP, A) JP-A-6- 248358 (JP, A) JP-A-6-47403 (JP, A) JP-B-51-22442 (JP, B1) JP-B-3-69972 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) C21D 9/52-9/66 C21D 1/02-1/773 C21D 11/00 C22F 1/04 F23L 7/00

Claims (2)

(57) [Claims] 1. (a) A roll whose surface temperature can be adjusted (b) A burner for frame treatment on the roll surface (c) A traveling speed detector of a metal strip (d) A detector for detecting the traveling speed of the metal strip A frame processing device for a metal strip, which is provided with a control means for automatically controlling a distance between the burner and a burner which runs on the surface of the roll in response to a signal and a traveling speed of the strip. . 2. In the frame treatment for annealing and degreasing a metal strip, the running speed of the metal strip is detected, and the distance between the metal strip running on the roll surface and the burner is automatically controlled accordingly. A frame treatment method for metal strips, characterized by controlling degreasing and annealing.