JPH0616929B2 - Guide and transport method for quenched metal ribbon - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a method of quenching and solidifying a molten alloy on the surface of a cooling body to directly produce a quenched metal thin body from a cooling body surface to a winding machine. The present invention relates to a method for smoothly guiding and conveying a thin body.

As a method for continuously producing a thin metal body, there is a technique for directly producing a thin body by rapidly solidifying a molten alloy on the surface of a cooling body. When the production method is applied to the production of an amorphous metal thin body, in order to produce a quenched metal thin body having a plate thickness of about 0.02 to 0.05 mm by a single roll method, it is generally 10 ⁴ to 10 ⁶ ° C /
A cooling rate of about a second is required.

In the method for producing a quenched metal strip, unlike the ordinary sheet rolling method, it is important to rotate the cooling roll at a constant high speed from the beginning of pouring. Otherwise, the paddle at the tip of the pouring nozzle cannot be stabilized, and it is extremely difficult to manufacture a quenched metal ribbon. In order to wind the quenched metal ribbon produced at a high speed, it is necessary to take special measures to guide the tip of the ribbon to the winding wheel of the winder.

<Prior Art> As a method for winding a quenched metal ribbon, Japanese Patent Laid-Open No. 55-156645 discloses that a winding reel having an adsorption function for initial winding is brought into close contact with a cooling roll. Methods have been proposed for capturing the tip of the ribbon. However, in the actual operation of manufacturing the quenched metal ribbon, sometimes the melted metal splashes due to nozzle cracking, paddle breakout, etc. may damage the wound and quenched metal ribbon, especially at the beginning of the operation. It is inconvenient to dispose the winder in the operation line and in terms of maintenance, and it is inconvenient because the space for installing the measuring instrument and the control instrument in the strip running line is difficult.

On the other hand, JP-A-57-39031 and JP-A-59-43772 each disclose a system in which a winder is arranged separately from a cooling roll, and especially JP-A-59-43772 discloses a guide device. Although a split-type ejector has been proposed, when the quenched metal strip is peeled from the quench roll with a gas knife, the flight of the ribbon is never straight, and the ribbon is released from the cooling roll in the process of flying. Since it oscillates due to the resistance of the atmosphere and flutters in an unstable manner, it entangles in the vicinity of the entrance of the ejector or closes the entrance, so smooth suction by the ejector cannot be realized.

Further, Japanese Patent Laid-Open No. 59-138572 proposes a method of trapping between rotating brush rolls, but like the above-mentioned method, it can be trapped between rolls unless the flying ribbon is stable. There wasn't.

<Problems to be Solved by the Invention> Therefore, in consideration of operability, maintainability, in-line measurement, and the like, it is desirable to dispose the winder away from the cooling body. In this arrangement, from the cooling body to the winder. It is essential to transport the quenched metal ribbon smoothly.

Therefore, it is an object of the present invention to propose an optimum method for guiding and transporting a rapidly cooled thin metal body from a cooling body to a winder which is arranged separately.

<Means for Solving Problems> Since a running cost is increased when a compressed air, nitrogen, or the like is used as a driving source like an ejector, although the present invention uses pinch rolls as a trapping means, the quenched metal ribbon is used. When manufacturing a sheet, it is necessary to devise a stable track in order to capture the thin strip flying from the cooling body by the gas knife with the pinch roll.

From this point of view, the inventors repeated a detailed experiment on the guide device of the gas knife and the strip that affect the track of the quenched metal strip after peeling from this viewpoint, and arranged a body wind plate between the cooling body and the pinch roll, It was found that the gas jets used for stripping the quenched metal ribbon flow on the air convection plate to form a guide airflow, and that when the quenched metal ribbon is flown in this guide airflow, its track is extremely stable.

Here, the air baffle plate is arranged on the opposite side of the ribbon surface, which receives the gas jet from the gas knife facing the rotating direction of the cooling body.

That is, according to the present invention, a rapidly cooled thin metal strip produced by supplying molten metal to the surface of a cooling body moving at high speed and rapidly solidifying on the surface of the cooling body is peeled from the surface of the cooling body, and then guided and conveyed to a winder. At this time, the quenched metal ribbon formed on the surface of the cooling body is separated from the surface of the cooling body by the gas jet from the gas knife, and the gas jet from the gas knife is
Between the cooling body and the pinch roll that captures the tip portion of the quenched metal ribbon, the airflow plate is disposed on the opposite side of the quenched metal ribbon that receives a gas jet from a gas knife facing the direction of rotation of the cooling body. A guide airflow directed toward the pinch roll along the guide airflow, flying a quenched metal strip in the guide airflow to guide it between a pair of pinch rolls, and a pair of pinch rotating the tip portion of the quenched metal strip at high speed. A method for inducing and transporting a quenched metal ribbon, characterized in that the pinch roll is captured between rolls, and then the pinch roll is transported to the winder side. Further, the pinch roll has a surface with a high friction coefficient. It is a high-speed rotating roll, and the trapping of the quenched metal ribbon between the pinch rolls is performed by first passing the ribbon between the open pinch rolls and then guiding the quenched metal ribbon with the pinch rolls closed. A transfer method.

In order to improve the formation of the guide air flow, it is advantageous that the air baffle plate has side plates and upper plates, and another air flow source may be added.

According to the present invention, the cooling body and the winder can be arranged apart from each other, which enhances the operability and the maintainability and enables the installation of the measuring / controlling device. If the cooling body and the winder are separated from each other, the key point is how to catch and thread the tip of the quenched metal ribbon.

Now, as shown in FIG. 1 by using the single roll method as an example of the procedure for guiding and conveying the quenched metal ribbon according to the present invention, the molten metal poured directly above the cooling roll 2 from the pouring nozzle 1 is rapidly cooled. The solidified metal ribbon 3 solidifies to form a quenched metal ribbon 3. In this case, the metal ribbon 3 is circulated about 2/3 around the peripheral surface of the cooling roll, and the lower end of the cooling roll 2 is used for peeling from the peripheral surface. 4 so that it is separated from the cooling roll 2.

Then, the peeled quenched metal thin strip 3 is flown between the cooling roll 2 and the pinch roll 6 on the guide airflow formed by the wind baffle 5 arranged on the leeward side of the gas knife 4 to fly. Lead to 6.

Then, the pinch roll 6 is caught between the rolls 7 at the tip of the quenched metal ribbon 3 and the quenched metal ribbon 3 is continuously passed. As shown in FIG. 2, the pinch roll 6 is supported on a traveling carriage so that it can travel together with the traveling carriage 8.

In the figure, 9 is a measurement and tension controller. Quenched metal ribbon 3
After catching the tip of, the traveling carriage 8 is moved and the pinch roll 6 is moved to a winder (not shown), but during that time, the rapidly cooled thin metal strip 3 is captured and passed.

A known device such as a single-cylinder type or twin-cylinder type winding wire is advantageously suitable for the winding machine.

Further, the pinch roll captures the quenched metal ribbon, the tension generated in the quenched metal ribbon by the passing plate is determined according to the interval between the cooling body and the winder, this tension is the surface material of the rotating pinch roll, It can be controlled by the rolling force and the rotation speed. In particular, it is extremely important to coat the roll surface with a material having a high friction coefficient such as non-woven fabric or rubber in order to apply tension to a ribbon made of an extremely thin and slippery material such as an amorphous alloy ribbon. Is. When a simple metal roll was used for the pinch roll, it slipped easily and 1kg
The required tension of not less than / mm ² could not be applied.

In addition, the airflow of the gas knife not only separates the quenched metal strip from the cooling body by installing the airflow plate on the leeward side of the gas knife, but also forms a guide airflow on the airflow plate, which stabilizes its flight. However, it became easier to capture the cooling metal strips successively peeled from the cooling body between the pinch rolls, but by passing the flying quenching metal strips between the open rolls and then closing them. Therefore, the quenched metal can be captured more reliably.

The method of catching the quenched metal ribbon at a distant position as in the present invention has an advantage that even if an operational trouble such as cutting of the ribbon occurs during winding, it can be easily dealt with by re-catching.

<Example> Cooler roll diameter: 800 mmφ 〃 Peripheral speed: 25 m / s Melting component: Fe 78, B 10, Si 12 (atomic%) Thin ribbon size: 25 μm thickness × 100 mm width Take-up reel: Magnetic adsorption method conditions When I made an amorphous quenched metal ribbon with
Continuous winding was possible.

Here, the air baffle was placed about 200 mm downwind of the gas knife, and the air baffle flow was 800 mm. The distance between the wind baffle and the cooling roll was 20 mm.

<Effects of the Invention> According to the method of the present invention, the quenched metal strip can be peeled from the cooling body and stably conveyed to the winder, and industrialization by the continuous winding line of the quenched metal strip can be advantageously realized. To be done.

[Brief description of drawings]

FIG. 1 is an explanatory view of a winding method of a quenched metal ribbon, and FIG. 2 is an explanatory view of a pinch roll supporting and conveying means. 1 ... Pouring nozzle, 6 ... Pinch roll, 2 ... Cooling roll, 7 ... Roll, 3 ... Quenched metal ribbon, 8 ... Traveling carriage, 4 ... Gas knife, 9 ... Measuring and tension Controller 5: Wind plate,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-82953 (JP, A) SAIKAI Sho-59-99049 (JP, U)

Claims (3)

[Claims] 1. A rapidly cooling metal ribbon produced by supplying molten metal to the surface of a cooling body moving at a high speed and quenching and solidifying on the surface of the cooling body, after peeling from the surface of the cooling body, and guiding and transporting it to a winder. At this time, the quenched metal ribbon formed on the surface of the cooling body is separated from the surface of the cooling body by the gas jet from the gas knife, and the gas jet from the gas knife is pinched to the tip of the cooling body and the quenched metal ribbon. Between the roll and a guide airflow directed toward the pinch roll side along a wind plate arranged on the opposite side of the rapidly cooled thin metal ribbon surface that receives a gas jet from a gas knife facing the direction of rotation of the cooling body, A strip of quenched metal strip is flown in the guide air flow and guided between a pair of pinch rolls, and the tip of the quenched metal strip is captured between a pair of pinch rolls rotating at high speed, and then pinched. Conveying the Lumpur the winding machine, the
A method for guiding and transporting a quenched metal ribbon characterized by the combination of 2. The method for guiding and conveying a quenched metal ribbon according to claim 1, wherein the pinch roll is a high-speed rotating roll having a surface having a high friction coefficient. 3. The trapping of the quenched metal ribbon between the pinch rolls is to first pass the ribbon between the open pinch rolls and then to close the pinch rolls. A method for inducing and transporting a quenched metal ribbon according to the item.