JPH0729187B2 - Quenched metal ribbon guiding / transporting device - Google Patents

Description

The present invention relates to a guide for conveying a quenched metal ribbon such as an amorphous alloy ribbon produced by a single roll method from a cooling roll to a winding device. -It relates to a carrier device.

(Prior Art) In recent years, a manufacturing technique for directly processing a molten metal (including an alloy; the same applies hereinafter) to a metal ribbon by a liquid quenching method such as a single roll method or a twin roll method has been developed. The first important requirement in such direct plate-making technology is the plate-making technology itself relating to the uniformity of the plate thickness and surface texture, but when considering industrial production, coil production is as much as that. It is also important to establish a winding technique for winding in a roll shape.

In the case of a crystalline metal ribbon having a plate thickness of 100 μm or more, the plate-making speed is usually 5 m / sec or less due to solidification due to heat transfer to the cooling body. In this case, it is possible to wind by conveying with a mesh belt having a clamper and winding with a heat resistant belt wrapper as proposed in JP-A-61-88904.

However, in the case of amorphous alloy thin plate, the plate thickness is 50 μm
Since it is extremely thin as follows and the plate-making speed is usually 20 m / sec or more, the conventional technique cannot be applied as it is. Moreover, since the material properties of the produced amorphous alloy ribbon change according to the plate-making speed, and the mechanical strength is often impaired, the plate-making is also performed when winding or rewinding on the take-up reel. The speed could not be changed, which made the development of winding technology even more difficult.

In JP-A-57-94453 and JP-B-59-34467, the problem of transport is avoided by arranging the take-up reel close to the cooling roll, and by embedding a magnet in the take-up reel, Amorphous alloy ribbon is wrapped around. This method can be said to be a clever method in which the troublesome transfer technique is eliminated by disposing the winding machine in the vicinity of the cooling roll.

However, this method is not always suitable for continuous production because the winder is too close to the chill roll. Moreover, it is not a preferable method in consideration of industrial production, because it is not possible to install a space for installing an inspection device for the plate thickness, holes, etc., or arranging a tension control device.

In this respect, JP-A-56-12257, 59-43772 and 59-138572
In the respective gazettes and the like, on the premise that the winder is arranged at a remote position of the cooling roll, the development of the conveyance technology is directly addressed. All of these are intended to be effectively conveyed by using a suction device, a brush roll, a brush-solid roll or the like as a pinch roll for capturing the amorphous alloy ribbon.

(Problems to be solved by the invention) Compared with the plate-making technology of amorphous alloy ribbon,
There are few reports on winding technology.

The inventors of the present invention, based on the judgment that the remote placement method basically has industrial advantages, have worked on a technique for guiding and transporting an amorphous alloy ribbon that is peeling and flying. I encountered a problem.

Here, as the pinch roll, a brush-solid roll obtained by combining a pair of brush rolls and a solid roll was used.

The amorphous alloy ribbon produced by rapid solidification on the chill roll is separated from the chill roll and then reaches the pinch roll portion via the guide. However, even if it was sandwiched by pinch rolls and tried to be applied as tension, it was not possible to continuously and stably apply tension to the ribbon because the ribbon was wrapped around the solid roll and fractured.

(Means for Solving the Problem) In order to stably apply tension to the ribbon by the pinch roll, it is necessary to elucidate the cause of the winding on the solid roll side and prevent the occurrence of such winding.

Therefore, as a result of extensive studies on this point, the inventors have found that the cause of the winding is due to the hydrodynamic suction force acting on the ribbon.

Therefore, as a means for solving the problem, it is sufficient to prevent the generation of the hydrodynamic suction force acting on the ribbon.

The present invention was developed based on the above findings.

That is, according to the present invention, a quenching metal ribbon which is rapidly solidified on a cooling roll rotating at a high speed to form a ribbon, and then a quenched metal ribbon separated from the roll surface by an air knife is guided to a pinch roll, and a guide. What is claimed is: 1. A quenching metal ribbon guiding / conveying device comprising a pinch roll for capturing the ribbon and a carrier for loading the pinch roll, wherein the pinch roll is a hollow solid having an air outlet on the surface of the roll cylinder. This is a guide / conveyor device for a quenched metal ribbon consisting of rolls and brush rolls.

In the present invention, it is advantageous to install a scraper on the quenching ribbon outlet side of the pinch roll, and further to dispose an introduction port and an introduction pipe for introducing compressed air into the roll on the roll side surface axis of the solid roll. Is.

The present invention will be specifically described below.

Fig. 5 shows the guidance around the pinch roll in the conventional device.
The transport unit is schematically shown. The molten metal injected from the pouring nozzle 1 forms a molten metal paddle 3 on the cooling roll 2 and is rapidly solidified to become a quenched metal ribbon 4. After being solidified, the rapidly cooled thin metal strip 4 is continuously cooled along with the adhering strip on the cooling roll 2. When the cooling roll 2 is rotated about halfway, the thin strip 4 is peeled off from the cooling roll 2 by the air 6 ejected from the air knife 5, and is directed by the suction force of the hoods 12 and 12 'and the fan 11 so that the solid strip is solid. It is guided to the pinch roll consisting of the roll 8 and the brush roll 9. At the beginning of the guidance, the movable solid roll 8 stands by above as shown in FIG. 2 (a). At this time, the force acting on the ribbon is uniform in the vertical direction. this is,
The velocity of the air flowing between the rolls is equal above and below the ribbon, so the air flow equation between the rolls is This is because P is the same as is clear from ρ: air density, V: air velocity, P: pressure.

Next, when the solid roll 8 approaches the ribbon 4 so that the solid roll 8 moves downward and the pinch roll starts rolling, the situation changes as shown in FIG. 2 (b).

That is, the gap between the solid roll 8 and the thin strip 4 becomes smaller, and the air flow velocity becomes higher, so that the pressure decreases as is apparent from the equation (1). 1
On the other hand, even if the brush roll 9 and the thin strip 4 are brought close to each other, the air flow velocity hardly changes because the brush roll 9 passes air. Therefore, a pressure difference is generated between the upper and lower sides of the thin strip 4 and the upward pressure is small, so that the thin strip 4 is lifted upward. As a result, a negative pressure phenomenon occurs between the surfaces of both the thin strip 4 and the solid roll 8 to cause adsorption.

Therefore, immediately before the pinch roll is pressed, the thin strip 4 adheres to the solid roll 8 and rotates in close contact with each other, so that wrapping occurs. The tension of the ribbon 10 that has made one turn increases, and the ribbon 10 continues to be wound, and excessive tension is applied to the ribbon, and eventually the ribbon is broken.

FIG. 3 illustrates the adsorption prevention mechanism according to the present invention. As shown in the figure, the solid roll 8 is made hollow, the air discharge port 17 is opened in the body part, and the air suction port 16 is opened in the flange part, and the negative pressure between the solid roll 15 and the ribbon 4 is set. The following equation (2) Here P _2: pressure P of the discharge air 18: Pressure U ₁ of the air suction port 16: roll barrel peripheral speed U _2: to ejecting discharge air 18 having a pressure P ₂ represented by the roll shaft peripheral speed By this, wrapping is prevented.

The second term on the right-hand side in equation (2) Is a centrifugal head generated by the rotation of the roll.

In order to peel the ribbon from the solid roll, it is sufficient to make holes on the roll surface to eliminate the negative pressure between the two as described above. To increase the peeling further, a means to increase the discharge amount is added. do it.

FIG. 4 shows the air flow in the solid roll 15 according to the present invention. Here, as a method of increasing the discharge flow of air, it is effective to insert a peller into the cavity of the solid roll to increase the suction force or to introduce compressed air from the roll shaft.

FIG. 1 shows a guiding / conveying unit according to the present invention in which a solid roll 15 is incorporated, and the ribbon 19 separated from the pinch roll becomes a crushing ribbon 20 by the fan 11 and is collected.

Note that the thin strip 19 leaves the pinch roll without adhering to it, and then is hit by the turbulence of the rear air.
Since it may enter between 3'and the rolls 15 or 9, it is more reliable to install scrapers 21, 21 'or air knives on the exit side of the pinch rolls in order to further enhance the winding prevention function. In this case, as described above, since the roll and the ribbon are not in close contact with each other, the scrapers 21, 21 '
It is not necessary to bring the rolls 15 and 9 into contact with each other, and therefore there is no risk of damage to the roll surface.

(Example) A comparative experiment was conducted under the following conditions using the guiding / conveying device shown in FIGS. 1 and 5 above.

Molten alloy: Fe ₈₀ B ₁₀ Si ₉ C ₁ (atomic%) Melting temperature: 1300 ℃ Pouring nozzle: 100mm wide slit Cooling roll: Water-cooled copper alloy Cooling roll peripheral speed: 25m / sec Solid roll: φ200mm diameter, steel In the roll according to the present invention, four inlets each having a diameter of 20 mm were formed in the flange portion, and outlets each having a diameter of 1 mm were formed in the body portion at a pitch of 30 mm.

Brush roll: φ200mm diameter, φ0.2mm wire diameter, stainless brush pinch roll peripheral speed: 28m / sec Air velocity in hood: 30m / sec Amorphous alloy ribbon with 100mm width and 20μm thickness created under the above conditions As a result of applying tension with a pinch roll, the results shown in Tables 1 and 2 below were obtained.

Also, if you install a device that puts compressed air from the shaft,
Although the shaft structure became a rotary joint and became complicated, almost the same results as the above table were obtained.

(Effect of the invention) Thus, by utilizing the pinch roll and the scraper according to the present invention, it is possible to stably apply tension to the ribbon, so that continuous winding can be stably achieved, and thus mass production is possible. It is possible, and its industrial utility is extremely large.

[Brief description of drawings]

FIG. 1 is a schematic view of a guiding / conveying unit around a pinch roll according to the present invention, FIGS. 2 (a) and 2 (b) are elucidation diagrams of a mechanism of occurrence of a winding phenomenon in a pinch roll, and FIG. Fig. 4 is a diagram for explaining the mechanism for preventing the winding phenomenon according to the invention, Fig. 4 is a diagram showing the air flow in the solid roll according to the invention, and Fig. 5 is a diagram for guiding around the pinch roll in the conventional device
It is a schematic diagram of a conveyance part. DESCRIPTION OF SYMBOLS 1 ... Pouring nozzle 2 ... Cooling roll 3 ... Molten paddle 4 ... Quenched metal ribbon 5 ... Air knife, 6 ... Air 7 ... Deflur, 8 ... Solid roll 9 ... Brush roll 10 ... Wound quenching metal ribbon 11 … Fan, 12… Hood 13… Pinch roll hood 14… Solid roll rotating shaft 15… Solid roll 16… Perforated solid roll 16… Air suction port, 17… Air discharge port 18… Discharge air, 19… Flying ribbon 20… Grinding ribbon, 21 ... scraper 22 ... transportation cart

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masanori Nara 1 Kawasaki-cho, Chiba-shi, Chiba Kawasaki Steel Co., Ltd. Technical Research Headquarters (72) Inventor Teruo Hiramatsu 1 Kawasaki-cho, Chiba-shi Kawasaki Steel Co., Ltd. Chiba Works

Claims (3)

[Claims] 1. A conveying guide for guiding a quenched metal strip, which is rapidly solidified on a cooling roll rotating at a high speed and rapidly peeled off from the roll surface by an air knife, to a pinch roll. What is claimed is: 1. A quenching metal ribbon guiding / conveying device comprising a pinch roll for capturing the ribbon and a carrier for loading the pinch roll, wherein the pinch roll is a hollow solid having an air outlet on the surface of the roll cylinder. A quenching metal ribbon guiding / conveying device comprising a roll and a brush roll. 2. The apparatus for guiding and conveying a quenched metal ribbon according to claim 1, wherein a scraper is installed on the exit side of the quenched ribbon of the pinch roll. 3. An apparatus according to claim 1 or 2, wherein an inlet and an inlet pipe for introducing compressed air into the roll are arranged at the roll side surface axis of the solid roll. Belt guiding / transporting device.