JPH0620616B2 - Guide and transport method for quenched metal ribbon - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for guiding and transporting a quenched metal ribbon manufactured by a single roll method from a cooling single roll to a winding machine.

[Conventional technology]

In recent years, a technique for directly producing a quenched metal ribbon from a molten metal (including an alloy) by a liquid quenching method such as a single roll method or a twin roll method has been developed. An important factor in the implementation of these technologies is the plate-making technology itself that first determines the uniformity of the plate thickness and the surface texture, but in the case of industrial production, it is necessary to further Handling,
That is, it is required to establish a winding technique for winding in a coil shape.

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

On the other hand, in the case of an amorphous thin body, the plate thickness is extremely thin as 50 μm or less and the plate-making speed is usually 20 m / sec or more. Therefore, the means disclosed in the above publication cannot be applied as it is. Furthermore, since the amorphous ribbon is changed in its material properties depending on the plate-making speed and its mechanical strength is often impaired, the plate-making speed cannot be changed even when it is wound around the take-up reel or rewound. This made it more difficult to establish the winding technique.

JP-A-57-94453 and JP-B-59-34467
In each of the publications, it is proposed that a winding reel is arranged close to a cooling roll, and a magnet is embedded in the winding reel to wind an amorphous alloy ribbon. This method is a clever method that does not require a troublesome transfer technology by placing the take-up reel close to the cooling roll, but since the take-up reel is extremely close to the cooling roll, continuous production Not necessarily suitable for. Further, it is not a preferable method when industrial production is taken into consideration, such as installation of an inspection device for the plate thickness, holes, etc., and a space for arranging the tension control device cannot be secured.

In this respect, JP-A-56-12257 and JP-A-59-4377.
No. 2, 59-13857 and JP-A No. 1-13363.
No. 52, etc., tackles the establishment of the transfer technology from the front, assuming that the winder is located at a remote position of the cooling roll. In each case, a suction device, a brush roll or a brush / solid roll pair is used. It is proposed to utilize and transport as a pinch roll for capturing the amorphous ribbon. If the amorphous ribbon peeled off from the cooling roll is captured between the pinch rolls without being destroyed and at the same time the tension required for conveyance is applied, stable winding can be realized.

[Problems to be Solved by the Invention]

Compared with the plate-making technology for amorphous alloy ribbons so far, there are few publicly known materials regarding the conveying / winding technology after plate-making, and it is not easy to study all the technologies. Judging from the judgment that the above-mentioned remote placement method is basically industrially advantageous, the winding machine is placed remotely from the cooling roll, and the amorphous ribbon that is peeled off from the cooling roll and flies. We worked on further improvement of guidance and transportation technology.

In the above-mentioned guiding / conveying method, a brush / solid roll pair in which a brush roll and a solid roll are combined is used as a pinch roll, and if the amorphous ribbon is captured between the pinch rolls, the tension required for conveyance It has been confirmed that can be applied to the ribbon.

Next, the amorphous alloy created by rapid solidification on the chill roll was peeled from the chill roll and then introduced to the pinch roll via the transport guide, with some modifications to the air knife and transport guide. , Induction was not so difficult.

However, the following problems were encountered. That is, even if the ribbon stripped from the cooling roll is made to fly in the transport guide to reach the pinch roll and is captured by the pinch roll, the ribbon cannot be continuously pulled, and sometimes the ribbon can be pulled. However, the pinch roll could not be moved to the take-up reel and wound up because the pinch roll was broken between the cooling roll and the transport guide.

INDUSTRIAL APPLICABILITY The present invention makes it possible to apply a tension required for carrying a ribbon, and to reliably guide and cool between the cooling roll and the pinch low
It is intended to realize transportation.

[Means for Solving the Problems]

That is, according to the present invention, a quenched metal ribbon formed by rapid solidification on a peripheral surface of a cooling single roll rotating at high speed is peeled from the cooling single roll, and then introduced into a cylindrical transport guide and arranged at the end of the transport guide. In order to guide the pinch rolls that have been cooled, capture the quenched metal ribbon with the pinch rolls, and then move the pinch roll to the winder to carry the quenched metal ribbon,
When a deflector roll having the function of an air floater is used to form a path line of a quenching ribbon at the upstream inlet of the transport guide, and the metal ribbon peeled from the cooling roll is trapped by the pinch roll and tension is applied, An air floater is used to form a pass line between the peeling point of the cooling roll and the pinch roll, and to eliminate friction of the deflector roll at this time.

The deflector roll is located at the upstream entrance of the transport guide, and there is sufficient air between the deflector roll and the transport guide bottom plate so as not to disturb the flow of air necessary for controlling the flight attitude of the ribbon flying in the transport guide. It is characterized in that a gap is provided only for passing through.

The present invention will be specifically described below.

FIG. 2 shows a preferred example of the apparatus used directly in the present invention.
A strip 2 formed by rapid solidification on the surface of a chill roll 1 rotating at high speed is peeled from the chill roll 1 by an air knife 3, guided to a cylindrical transport guide 4, and then loaded on a transport carriage 6. Pinch roll 5 (brush roll 5a
And the solid roll 5b), the ribbon 2 is captured, the transport carriage 6 is moved together with the pinch roll 5 to a winding machine (not shown), and the ribbon 2 is wound by the winding machine.

In this kind of configuration, a deflector roll 7 is installed above the bottom plate of the transport guide 4 at the upstream inlet of the transport guide 4, and the deflector roll 7 is a pinch roll 5 and a ribbon 2.
In order to improve the flight posture of the ribbon 2 before capturing the air, as shown in the partial enlarged view of FIG. 2 in FIG.
An air ejection hole 11 for ejecting air is provided as an air floater so that a pass line is formed after capturing 0 and friction does not occur.

Further, in order to reduce the turbulence of the air flow flowing into the conveyance guide 4 by the deflector roll 7, an apron 12 (guide plate) for smoothing the air flow in the conveyance guide is provided on the lower surface of the deflector roll 7 as necessary. It is effective to provide them.

The deflector roll 7 functions to form a proper pass line when tension is applied to the ribbon. Also,
It goes without saying that the deflector roll 7 is particularly effective for forming a pass line when the set position of the transport guide 4 changes in the height direction of the cooling roll.

A high-speed airflow is formed in the conveyance guide 4 by a blower 8 installed behind the pinch roll 5. In addition, 9 is a pouring nozzle.

By arranging the roll axis direction of the deflate roll 7 parallel to the cooling roll axis and the pinch roll 5 axis, uniform tension can be applied in the width direction of the ribbon 2.

[Action]

 Next, an experiment leading to the present invention will be described.

The ribbon 2 was repeatedly guided and conveyed using the apparatus shown in FIG.

The apparatus shown in FIG. 2 has the deflector roll 7 of the apparatus shown in FIG. 2 attached to the bottom plate of the conveyance guide 4. According to the experiment of FIG. 3, the ribbon 2 could be introduced from the cooling roll 1 through the transport guide 4 to the entrance side of the pinch roll 5, but the ribbon 2 could not be applied with tension. Further, the result was that the ribbon 2 was immediately broken even if tension could be applied at times. In order to elucidate the cause, the behavior of the ribbon 2 flying in the transport guide 4 was recorded by VTR or the like, but only continuous ribbons could be observed.

When casting a thin strip such as an amorphous alloy, which is the object of the present invention, the plate-making speed is usually 25 to 30 m / sec. Therefore, a static image without image deletion is obtained by a general VTR imaging method. It was found that the detailed movement of the ribbon cannot be analyzed because it is not possible. Therefore, the whole place is set as a dark place, and 1
When a picture was taken by strobe light emission of / 50000 seconds, it was possible to perform VTR recording of a still image with no image deletion of thin ribbons flying in the conveyance guide. Next, when the record was analyzed in detail, the following results, which were completely unpredictable in the VTR observation up to that time, were obtained. That is, (1) When the pinch roll captures the ribbon, the ribbon stretches linearly between the pinch roll and the cooling roll, but if there is a deflector roll between them, the ribbon will be caught between the deflector roll and the cooling roll. A pass line is formed to maintain a stable separation point that is not affected by the air knife wind.

(2) When the ribbon was captured by the pinch roll, tension was instantaneously applied to the ribbon, but immediately after that, the deflector roll portion was broken.

(3) When the ribbon was captured by the pinch roll, the ribbon was in close contact with the deflector roll instantaneously.

(4) In (3), the ribbon was collided with the bottom plate of the transport guide even after being separated from the deflector roll toward the downstream side, and was broken.

(5) It was observed that the thin ribbon flying in the transport guide was hit by the bottom plate near the entrance of the transport guide by the airflow having a downward force by the wind from the air knife.

As described above, the deflector roll is indispensable for forming the pass line of the ribbon between the pinch roll and the cooling roll, but on the other hand, the fact that the ribbon is broken is caused by the pinch roll. It was found that this is the reason why tension cannot be applied to the belt.

As a result of studying the cause of this, when tension is applied to the ribbon captured by the pinch roll and it contacts the deflector roll, friction occurs on the ribbon on the deflector roll surface, and as a result, the upstream and downstream of the deflector roll become the boundary. It was found that there was a so-called sticking phenomenon in which the tension of the ribbon was different.

That is, there is a difference in speed between the ribbon on the upstream and downstream sides of the deflector roll, the speed on the upstream side becomes lower than the plate-making speed, and slack in the ribbon occurs, and the ribbon collides with the deflector roll and breaks. Occurs.

As a means for solving the sticking phenomenon, this problem has been solved by adopting floater air on the ribbon passing surface of the deflector roll.

Next, the unbroken ribbon was captured by using a deflector roll equipped with a floater air, and a phenomenon in which the ribbon was struck by the transport guide bottom plate and ruptured immediately after passing through the deflector roll was recognized by the VTR. It was found that this was due to the wind flow around the deflector roll.

That is, the wind drawn into the conveyance guide by the suction force of the blower has a significantly lower wind speed near the bottom plate of the conveyance guide inlet due to the attachment of the deflector roll, while the wind of the air knife for stripping strips causes It is receiving a downward force.

As a solution to these problems, when a gap was created between the deflector roll and the transport guide to create a flow path for the wind, it was found that the wind flowing through the gap had a wind speed sufficient to push the ribbon upward. The ribbon rupture also disappeared.

In addition, the air from this gap has a large effect on pushing the flight posture of the ribbon flying in the conveyance guide upward in the early stage of plate making until the ribbon is separated from the cooling roll and captured by the pinch roll. As a result, the effect that the thin strip collides with the bottom plate and breaks in the transport guide before being captured is greatly improved.

Moreover, in order to make the wind that flows from the gap between the deflector roll and the transport guide smoother, an apron 12 was adopted for the deflector roll, and even when there was a waviness phenomenon caused by the discontinuous tension fluctuation of the ribbon It was confirmed that there is an effect of absorbing the.

〔Example〕

 Next, the present invention will be described based on examples.

B: 10 at%, Si: 9 at%, and C: 1 at%,
After holding the molten alloy having the composition of the balance Fe at 1300 ° C., it was injected from a slit nozzle having a width of 100 mm immediately above a cooling roll made of a copper alloy that rotates at high speed (25 m / sec), and an amorphous alloy with a plate thickness of 25 μm. A ribbon was manufactured. In addition,
As shown in FIG. 1, the deflector roll 7 has an air ejection port 11 on the ribbon passing surface, an air inlet 10 is provided between the deflector roll 7 and the conveyance guide bottom plate, and the deflector roll 7 is conveyed by suction of a blower behind the pinch roll. A high-speed airflow was created in the guide.

Next, peel the ribbon from the cooling roll with an air knife, introduce this ribbon into the conveyance guide, guide it to the pinch roll composed of brush and solid roll in the open state, let it pass between the rolls, and then remove the pinch roll. The ribbon was captured by rolling down. In the thin ribbon immediately after being captured, a pass line was formed between the pinch roll and the deflector roll that were tensioned at a stretch from the flying state, but the deflector roll was not shockedly contacted, and the bus line was stable. Induced without breaking. Next, it was confirmed that the pinch roll rotating at a high speed of about 2 m / sec for the cooling roll gives a stable tension to the amorphous alloy ribbon, and the pinch roll can be moved by the carriage to convey the ribbon. .

〔The invention's effect〕

As described above, according to the present invention, the amorphous metal alloy ribbon produced by the single roll method can be guided / conveyed and wound without breaking, which is industrially excellent. Production technology can be provided.

[Brief description of drawings]

FIG. 1 is a partially enlarged view of a guiding / conveying device used for practicing the present invention, FIG. 2 is a schematic diagram of the guiding / conveying device used for practicing the present invention, and FIG. 3 is a schematic diagram of an experimental device. 1 ... Cooling roll, 2 ... Thin strip 3 ... Air knife, 4 ... Transport guide 5 ... Pinch roll, 5a ... Brush roll 5b ... Solid roll, 6 ... Transport cart 7 ... Deflector roll, 8 …… Blower 9 …… Pouring nozzle, 10 …… Air inlet 11 …… Air jet, 12 …… Apron

Front page continuation (72) Inventor Masanori Nara 1 Kawasaki-cho, Chiba-shi, Chiba Inside the Technical Research Division, Kawasaki Steel Co., Ltd. (56) Reference JP-A-1-254658 (JP, A) JP-A-63-63557 (JP, A)

Claims (2)

[Claims] 1. A quenched metal ribbon produced by rapid solidification on a peripheral surface of a cooling single roll rotating at a high speed is peeled off from the cooling single roll, and then introduced into a cylindrical transport guide to the end of the transport guide. The pinch rolls are guided to the placed pinch rolls by the suction force of the blower, and the pinch rolls are used to capture the quenched metal ribbons, and then the pinch rolls are moved to the winder to transport and wind the quenched metal ribbons. An air floater-type deflector roll is installed at the upstream inlet of the guide to substantially form a pass line of the quenched metal ribbon, and the metal ribbon is floated along the pass line while blowing air from inside the deflector roll. Induction of a quenched metal strip characterized by passing through the transport guide in the state
Transport method. 2. The method for guiding and transporting a quenched metal ribbon according to claim 1, wherein air is introduced from between the deflector roll and the transport guide bottom plate by the suction force of the blower.