JPH0620615B2 - Conveying device for quenched metal ribbon - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is for transporting a quenched metal ribbon such as an amorphous metal ribbon produced by a single roll method from a cooling roll to a winding device. Concerning a carrier device.

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

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 / due to the restriction of solidification due to heat transfer to the cooling body.
Less than a second In this case, JP-A-61-88904
It is possible to wind by conveying with a mesh belt having a clamper as proposed in 1 above and winding with a heat resistant belt wrapper.

On the other hand, in the case of the amorphous alloy ribbon, the plate thickness is extremely thin, 50 μm or less, and the plate-making speed is usually 20 m / sec or more, so that the conventional technique cannot be applied as it is. Moreover, the material properties of the amorphous alloy ribbon for plate making change depending on the plate making speed, and often the mechanical strength is remarkably lost. Therefore, even when winding or rewinding on a take-up reel. The inability to change the plate making speed has made it more difficult to develop winding technology.

JP-A-57-94453 and JP-B-59-34467
Then, the take-up reel was placed close to the cooling roll to avoid the problem of conveyance. A magnet is embedded in the take-up reel, and an amorphous alloy ribbon is wound around it. This method is a clever method that does not require a troublesome conveying technique 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. Further, it is not a preferable method in view of industrial production, 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, 59-43722,
59-138572 and Japanese Patent Laid-Open No. 01-133652 are working directly on the solution of the transport technology on the assumption that the winding machine is arranged at a position remote from the cooling roll.
In all of these, it is proposed that an aspirator, a brush roll, a brush / solid roll, or the like be used as a pinch roll for capturing the amorphous alloy ribbon, and that the roll is conveyed. There is no problem if the amorphous alloy ribbon stripped from the chill roll is captured by these pinch rolls without being broken, and at the same time, the tension required for transport can be applied.

[Problems to be Solved by the Invention]

Up to now, compared to the plate-making technology of amorphous alloy ribbon, there are few documents known about the conveying / winding technology, and it is not easy to discuss the conventional technology.

The inventors of the present invention have determined that the remote placement method is basically industrially superior, and therefore, the winder is placed remotely from the cooling roll to separate and fly from the cooling roll. Worked on obi transport technology.

As the pinch roll, a brush / solid roll obtained by combining a brush roll and a solid roll was used. It has been confirmed that by sandwiching the amorphous alloy ribbon between the pinch rolls, the tension required for transportation can be applied.

The amorphous alloy ribbon produced by rapid solidification on the cooling roll is peeled from the cooling roll, received by the deflector roll, and reaches the pinch roll portion via the transport guide. After making some improvements to the air knife and transport guide,
Apparently, it was not so difficult to realize such a situation, but even if the pinch roll was pressed down, the ribbon could not be pulled. It cannot be used as a carrier in such a system.

In this way, the quenched metal strip stripped from the chill roll,
Simply reaching the pinch roll via the transport guide could not give the tension required to transport the ribbon.

The present invention intends to clarify the cause of this and to realize a conveying device capable of applying a tension required for conveying a thin ribbon.

[Means for Solving the Problems]

That is, the present invention, when producing a quenched metal ribbon by the single roll method, peels the metal ribbon produced by rapid solidification on the cooling roll surface rotating at high speed from the cooling roll, and then the tubular transport guide. It is introduced inside and guided to the pinch roll arranged at the end of this conveyance guide, after capturing the quenched metal ribbon with the pinch roll, the pinch roll is moved to the winder to convey the quenched metal ribbon. In a transport device for rapidly cooling thin metal strips, the transport device is equipped with a transport guide without a leading end that guides the leading edge of the ribbons that are sequentially updated to the pinch roll position of the transport device, and the transport guide has a deflector roll at the tip. In addition to the above, the length of the transport guide is set to 10 cm to 100 cm to prevent breakage of the quenched metal ribbon in the transport guide. A.

[Action]

As shown in FIG. 1, the molten metal is supplied from the pouring nozzle 9 onto the surface of the cooling roll 1 that rotates at a high speed, and the metal ribbon 2 is formed by rapid solidification. The metal ribbon 2 is peeled from the cooling roll 1 by the air knife 3, guided into the transport guide 4, and captured by the pinch roll 5 loaded on the transport carriage 6. The transport carriage 6 moves to the winder (not shown) together with the pinch roll 5, and the winder winds the ribbon 2. The pinch roll 5 is composed of a combination of a brush roll 5a and a solid roll 5b. The transport guide 4
A high-speed air flow is formed inside by a blower 8 installed behind the pinch roll. Further, a deflector roll 7 is installed on the entrance side of the transport guide 4 so as to function when a pass line is constructed when tension is applied to the quenched metal ribbon.

The metal ribbon 2 passes from the cooling roll 1 through the transport guide 4,
Although it reached the pinch roll 5, tension could not be applied to this ribbon. To understand the cause,
The amorphous alloy ribbon flying in the transport guide was recorded by a VTR and observed. However, when a quenched metal ribbon such as an amorphous alloy, which is the object of the present invention, is cast, the plate-making speed is usually 25 to 30 m / sec. Since it was not possible to obtain a still image, continuous thin ribbons were observed in the VTR, and it was found that detailed movement of the thin ribbons could not be analyzed.

Then, when the whole was set in a dark place and stroboscopic light emission was performed for 1 / 50,000 seconds, it was possible to perform VTR recording of a static image without image deletion of a thin ribbon flying in the transport guide. A detailed analysis of the records resulted in the following results, which were completely unpredictable in VTR observations up to that point.

(1) Thin ribbons flying in the transport guide are broken in places.

(2) Cracks often occur in the ribbon in the transport guide.

(3) The cracked amorphous alloy ribbon is easily broken when tension is applied.

It has been newly found that the breakage in the transport guide as described above is a reason why the tension is not applied to the amorphous alloy ribbon by the pinch roll.

As is well known, the mechanical strength of the amorphous alloy ribbon is extremely high. When the cause of the high-strength material easily cracking in the transport guide was examined, there was a problem with the peripheral surface of the transport guide. That is, 25 to 30 m /
When the high-speed flight ribbon of the second collides with the peripheral surface of the transport guide,
It was cracked or broken. It is considered that this is because the amorphous alloy ribbon is strong in uniaxial tension but weak in shearing force.

That is, in order to solve such a problem, the quenched metal strip stripped from the cooling roll by the air knife,
It is necessary not to collide with the windings flying in the transport guide and the upper and lower surfaces and side surfaces of the transport guide. In the present invention,
As a concrete measure, by limiting the length of the transport guide to 10 cm to 100 cm, it is possible to prevent breakage of the quenched metal ribbon on the peripheral surface of the transport guide.

In the present invention, the reason why the conveyance guide length is limited will be described based on concrete experimental data.

Fe ₈₀ B ₁₀ Si ₉ C ₁ composition (atomic%) 13
After the temperature was maintained at 00 ° C., it was injected from a slit-shaped nozzle having a width of 100 mm onto a cooling roll made of a copper alloy that rotates at a high speed (25 m / sec) to produce an amorphous alloy ribbon having a plate thickness of 25 μm. The transport guide 4 was arranged as shown in FIG. 1, and the length of the transport guide was changed from 10 cm to 200 cm. A blower behind the pinch roll 5 produces a high-speed airflow of about 35 m / sec in the conveyance guide 4.

The amorphous alloy ribbon stripped off with an air knife is smoothly guided into the conveyance guide, and then the opening between the pinch rolls composed of brush and solid rolls is confirmed, and then the pinch rolls are removed. The time until the amorphous alloy ribbon was captured by pressing was measured, and the data shown in FIG. 2 was obtained. That is, the length of the transport guide is 1
It was found that the amorphous alloy ribbon can be captured within 10 seconds if the length is 00 cm or less. Beyond this length, capture becomes significantly more difficult. It is considered that this is because the length of the transport guide becomes longer and the probability of collision destruction of the amorphous alloy ribbon on the peripheral surface becomes higher.

If there is no conveyance guide 4 as shown in FIG. 1 between the cooling roll and the pinch roll, there is no possibility of breakage due to collision. However, since it is not possible to stably guide the pinch roll without the transport guide, it is essential to install this transport guide in the present invention.
It was not possible to form a stable high-speed air flow necessary for capturing with a pinch roll with a conveyance guide shorter than cm.
For the above reason, in the present invention, the length of the transport guide is set to 10
Limited to cm to 100 cm.

〔Example〕

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

Fe ₈₀ B ₁₀ Si ₉ C ₁ composition (atomic%) 13
After the temperature was maintained at 00 ° C., it was injected from a slit-shaped nozzle having a width of 100 mm onto a cooling roll made of a copper alloy that rotates at a high speed (25 m / sec) to produce an amorphous alloy ribbon having a plate thickness of 25 μm. The transport guide 4 was arranged as shown in FIG. 1 and its length was 60 cm. First, pinch roll 5
About 33m inside the transport guide 4 by the rear blower 8.
/ Sec high-speed airflow is generated.

The amorphous alloy ribbon stripped off with an air knife is smoothly guided into the transport guide, and then the passage between the open brush roll and the pinch roll composed of the solid roll is confirmed, and then the pinch roll is pressed down. As a result, the amorphous alloy ribbon was surely captured within 2 seconds.

In this case, the amorphous alloy ribbon that flies in the transport guide does not break in the transport guide, and is stabilized against the amorphous alloy ribbon by the pinch roll that rotates at a speed of 2 m / sec faster than the cooling roll. By applying various tensions, and then moving the carriage with the pinch roll,
The ribbon could be transported.

〔The invention's effect〕

As described above, according to the present invention, a quenched metal ribbon such as an amorphous alloy ribbon produced by the single roll method can be conveyed and wound without breaking,
The significance as a production technology is extremely large.

[Brief description of drawings]

FIG. 1 is a schematic side view of an embodiment of the present invention. FIG. 2 is a diagram showing the relationship between the length of the conveyance guide and the time from the pinch roll closing to the ribbon capture. 1 ... Cooling roll 2 ... Thin strip 3 ... Air knife 4 ... Transport guide 5 ... Pinch roll 6 ... Transport cart 7 ... Deflector roll 8 ... Blower 9 ... Pouring nozzle

Front page continuation (72) Inventor Masanori Nara, 1 Kawasaki-cho, Chiba-shi, Chiba, Technical Research Division, Kawasaki Steel Co., Ltd. (72) Teruo Hiramatsu 1 Kawasaki-cho, Chiba, Chiba, Kawasaki Steel Co., Ltd. (56) Reference JP-A-1-180759 (JP, A)

Claims (1)

[Claims] 1. A transporting device for a quenched metal ribbon in which a tip of a ribbon stripped from a cooling roll in a single roll method for producing a quenched metal ribbon is captured by a pinch roll and is transported to a winder. A transport guide without a leading end stop that guides the leading end of the ribbon to be renewed to the pinch roll position of the transport device is mounted, and the transport guide is provided with a deflector roll at the tip and the transport guide has a length of 10 mm.
A conveying device for a quenched metal ribbon, characterized in that the thickness is from 100 to 100 cm.