JPH0716773B2 - Operation diagnosis method in metal ribbon manufacturing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention guides and conveys a quenched metal ribbon such as an amorphous metal ribbon produced by a single roll method from a cooling roll to a winding device and winds it. The present invention relates to an operation diagnosis method characterized by monitoring and controlling the tension of a line during the transportation of a thin metal strip. By applying an appropriate tension to the metal ribbon, it is possible to prevent the metal ribbon from sagging or breaking during transportation. As a result, it becomes possible to carry out the transportation economically and accurately as compared with the conventional case.

[Conventional technology]

In recent years, development of 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 advanced. The first issue of these direct manufacturing techniques is the plate-making technology itself concerning the uniformity of the plate thickness and surface properties, but when considering industrial production, the coiling is performed in the same manner as that for coiling. It is important to establish transport and winding technology for

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 the restriction of solidification due to heat transfer to the cooling body. In this case, it is possible to wind by transporting with a mesh belt having a clamper and winding with a heat resistant belt wrapper as proposed in JP-A-61-88904.

On the other hand, in the case of an 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, since the amorphous alloy ribbon for plate making changes the material properties depending on the plate making speed, and often loses significant mechanical strength, it is also possible to wind or rewind the film on the take-up reel. The inability to change the plate-making speed has made it more difficult to develop the transport winding technique. Furthermore, the amorphous alloy ribbon has a plate thickness of 50μ.
Since it is less than m, it is difficult to efficiently wind the sheet-formed amorphous alloy ribbon unless proper tension can be obtained during transportation, winding and winding.

In JP-A-57-94453 and JP-B-59-34467, the take-up reel is arranged 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 winder close to the cooling roll. However, this method is not always suitable for continuous production because the winder is too close to the chill roll. In addition, it is not a preferable method in view of industrial production, such as installation of an inspection device such as a plate thickness or a hole, and a space for arranging a tension control device, which is most important for winding, cannot be secured.

In this respect, JP-A-56-12257, 59-43772 and 59
-138572, JP-A-62-290477, etc. presuppose that the winding machine is arranged at a remote position of the cooling roll.
We are working on the solution of transportation technology from the front. 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.

Therefore, regarding transportation, winding, and winding, the amorphous alloy ribbon stripped from the cooling roll is not destroyed, but is captured between these pinch rolls, and at the same time, the tension required for transportation is applied. There is no problem if speed control is used and winding and winding are performed in a certain tension range after being conveyed without causing meandering and breakage by constantly monitoring and controlling. For that purpose, it is important to obtain an appropriate tension value during transportation, winding and winding.

[Problems to be Solved by the Invention]

Up to now, compared with the plate-making technology of the amorphous alloy ribbon, there are few publicly known materials regarding the transporting / winding technology, and it is not easy to discuss the conventional technology. The applicant of the present invention has determined that the remote placement method is basically industrially advantageous, and therefore, the winder is remotely placed from the cooling roll to separate and fly from the cooling roll. Guidance / transportation of obi
When I worked on the development of winding and winding technology, I encountered the following problems.

The amorphous alloy ribbon produced by rapid solidification on the chill roll is separated from the chill roll and then reaches the pinch roll via the transport guide. The quenched alloy ribbons captured by the pinch rolls are transported to the winder by the transport carriage and wound, and the metal ribbons are wound, but the metal ribbons are wound without sticking and breaking. Must be transported to the equipment.

For that purpose, it is important that the tension of the pass line is always set to a certain value during the transportation of the thin metal strip so that the transportation of the tension fluctuation is extremely small. However, in the production of metal ribbon using the single roll method,
The plate-making speed is 20m / sec or more, and the plate thickness of the quenched metal ribbon is 100μm or less including not only amorphous but also crystalline, so very small tension value is accurate and high. The response speed must be monitored and, in addition, stable control must be performed at the same high response speed.

[Means for Solving the Problems]

As described above, in order to convey, wind and wind the quenched metal strip stripped from the cooling roll, in order to convey at high speed with a very small tension value during conveyance, winding and winding. It is necessary to always measure accurately with a high response speed. Conventionally, the tension of the plate conveyed on the pass line is simply measured by using a roll and a load cell.
However, with such an apparatus and measuring method, it is completely impossible to obtain an output of extremely low tension and an accurate high response speed required for carrying, winding and winding of a metal ribbon. Therefore, it was necessary to devise some method and apparatus for measuring the tension value during the winding and winding of the metal ribbon.

Therefore, the following items are proposed in the present invention.

First, at least before and after the dancer roll, which plays an important role in tension control in the pass line, so that tension measurement in transport, winding and winding can be performed at key points in the pass line. Be able to measure.

In addition, there is a need to measure passline tension with a very high response speed. At this time, in order to detect the tension, the metal ribbon is suspended on a roll as a probe member, and in a normal tension measuring device that measures the tension by the force acting on this roll, since the roll itself has an inertia moment, There is no problem if it rotates in perfect synchronization, but in the case of a metal ribbon, the thickness of the plate itself is very thin, and because of the high speed such as 20 m / sec or more, the problem of floating metal ribbon Was often generated, and it was impossible to rotate them together to perfectly synchronize the roll peripheral speed with the line speed. Therefore, in order to carry the roll and the metal ribbon in synchronization with each other, a line-driving drive device is required independently, but this makes tension measurement impossible. In addition, when frictional resistance is present in the rotation of the roll, the tension of the metal ribbon is always affected when it is rotated, and it is difficult to accurately measure the tension of the metal ribbon.

FIG. 3 shows the results of experimentally carrying, winding and winding using a rotary type roll. A tension meter using a rotary roll was inserted in the line to output the tension value. At this time, when the tension was measured in accordance with the output value of the output side tensiometer, there was a difference from the value of the entrance side tensiometer. The metal ribbon was broken when it was further wound.

In order to solve the above problems, the present invention is a tensiometer that measures the tension in a non-contact state with a probe member of a tensiometer when the metal ribbon is conveyed and the line tension of the metal ribbon is measured. Was used.

That is, the present invention manufactures a quenched metal ribbon by injecting molten metal through a slit-shaped nozzle on the surface of a rotating cooling roll, and a quenched metal ribbon is wound by a winding device arranged at a remote position from this cooling roll. A method of controlling the tension of the quenched metal ribbon by displacing the dancer roll by suspending the quenched metal ribbon by installing a dancer roll device between the cooling roll and the winding device while continuously winding. , The tension of the quenched metal ribbon at least at both positions before and after the dancer roll existing on the pass line of the quenched metal ribbon is measured in a non-contact state to judge the suitability of the operating state. This is an operation diagnosis method in the production of quenched metal ribbon.

Further, as a method of making the measurement by bringing the roll, which is the probe member of the tensiometer, and the metal ribbon into non-contact with each other, the tension is measured by using a method in which gas is blown out from the roll to make the non-contact. Therefore, when the metal ribbon is transported and the line tension of the metal ribbon is measured, the roll, which is the probe member of the tensiometer, is a gas float system that uses gas, and the gap between the metal ribbon and the tensiometer is not measured. The contact is made and the tension is measured.

Also, in order to prevent the influence of the heat of the metal ribbon from affecting the tensiometer when the temperature of the metal ribbon such as crystalline is high,
The tension is measured by using a fluid as a method of bringing the roll, which is a probe member of the tensiometer, out of contact with the roll. Specifically, when the metal ribbon is conveyed and the line tension of the metal ribbon is measured, the roll used for the tensiometer is a liquid float system that uses a liquid, and the space between the metal ribbon and the tensiometer is measured. Measure tension while keeping it in non-contact state.

In the production of such metal ribbon, the line tension is quite different from the line used in normal steel technology,
It is less than a dozen kg. Therefore, to measure the line tension,
There is a need to measure weak signals more accurately. FIG. 4 shows a state in which the metal ribbon 2 is wound around the tension device 7 or 9. The output ratio of the tension 12 is also changed by changing the winding angle 14 of the metal ribbon 2 with respect to the measuring device.
Therefore, the winding angle 14 of the metal ribbon can be changed to obtain the winding angle at which tension is easily output. However, below a certain angle, it is difficult to distinguish from noise because the signal has a weak tension.

FIG. 5 shows the results of measuring the output ratio of tension by changing the winding angle of the metal ribbon from 0 degree to 210 degrees. The output ratio of the tension is the ratio of the tension 13 output by the roll of the tension device to the tension 12 actually applied to the metal ribbon. The output ratio of tension was drawn as a sine curve in which the wrapping angle rises from 0 degree, the peak is at 180 degrees, and it further falls. But,
At this time, when the winding angle is 8 degrees or less, the output ratio of the tension is not clear because of noise, and when the winding angle is 10 degrees or more, the output ratio of the tension can be clearly identified.

Therefore, in the present invention, the winding angle of the tensiometer with respect to the probe member is set to be 10 degrees or more and 180 degrees or less from the traveling direction of the line. As a result, the tension signal and the noise can be completely discriminated from each other, and a clear signal can be obtained.

Further, in order to control the tension of the metal ribbon in the winding process of the quenched metal ribbon, control having high speed characteristics is required. For this reason, control needs to be done online for line tension as well as quickly and accurately. In order to satisfy this, for example, there is a method of generating tension by pinch rolls,
This requires pinch rolls to pinch the metal strips, and it is necessary to control the gap between the rolls, and it is almost impossible to pinch a metal strip of several tens of μm at a constant rolling reduction. Since the transport speed of the metal ribbon is at least 20 m / sec, it is very difficult to control the pinch roll perfectly at that speed and without giving strain or extra tension.

Therefore, in the present invention, as a method with high speed and good online control characteristics, the control is performed online by the displacement of the dancer roll based on the measured value of the tension.

The present invention will be described based on specific data.

Heretofore, there has been no effective means for transporting a metal ribbon and winding it on a take-up reel. Therefore, various methods have been used when winding the metal ribbon. However, none of these methods worked. Therefore, the present inventors have developed a method for transporting a metal ribbon using a transport carriage. However, even with this method, there was a need to further use the following method and apparatus in order to complete the method for transporting the metal ribbon.

That is, first, as shown in FIG. 1, the entrance tension device 7 is arranged between the cooling roll 1 and the dancer roll 8 which rotate at high speed, and the exit tension device 9 is interposed between the dancer roll 8 and the winding device 6. Was placed.

Next, using this apparatus, the metal ribbon 2 produced by rapid solidification on the surface of the cooling roll 1 rotating at high speed is peeled off from the cooling roll 1 and then by the pinch roll 4 loaded on the transport carriage 3. The experiment of capturing, transporting and winding the metal ribbon 2 was repeated in detail.

The transport carriage 3 travels to transport the thin metal strip 2 and the winding device 6
The metal ribbon 2 was conveyed to. Next, as shown in FIG. 2, the respective devices were arranged so as to sequentially enter the line to form a pass line.

FIG. 6 shows the tension target at the time of carrying and winding in the carrying and winding device, and the tension values on the entrance side and the exit side with the dancer roll as the boundary. As shown in FIG. 6, control is performed so that the output of the tension device is completely settled to the target value during conveyance, and when the construction of the pass line is completed, the tension values on the entrance side and the exit side of the dancer roll are adjusted. After confirming that the tension target is almost reached, wrap it. By setting the tension in a certain range for winding, the metal ribbon can be wound without breaking. In addition, since the metal ribbon is not slackened, sticking or broken by being kept constant during winding, winding can be performed as a coil having no winding unevenness.

〔Example〕

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

Fe ₈₀ -B ₁₀ -Si ₉ -C ₁ composition (atomic%) of molten alloy at 1300 ℃
After that, it was injected from a nozzle on a slit having a width of 100 mm immediately above a cooling roll made of a copper alloy rotating at a high speed (25 m / sec) to produce an amorphous alloy ribbon having a plate thickness of 25 μm.

The sheet-made metal ribbon is captured by the pinch roll 4,
Transport was performed by the transport carriage 3. The transport carriage 3 traveled and transported the thin metal strip 2. The dancer roll and the tension device are inserted in the line while the transport carriage 3 is transporting, and the winding device 6
The line is completed when passing in front of the. The tension device measured at the time of entering the line and monitored the tension.

At this time, the angles of the tension devices on the inlet side and the outlet side with respect to the line advancing direction were 60 degrees. Both used the air float type.

After the line tension is measured and the tension of the metal ribbon is adjusted to a constant value, the conveyance is completed and then 4-5k
After confirming that the tension of the metal ribbon was within the tension set to g, the metal ribbon was wound around the winding device 6.
The metal ribbon was wound around the winding device without causing breakage, and was wound in a coil shape without causing unevenness such as loosening and winding tightness by keeping the tension constant, and the winding was completed.

In the past, the metal ribbon could not be successfully wound up even though it was manufactured. For example, when a rotary type roll is used in the tensiometer, it is apparent that breakage occurs at the moment when the ribbon is wound around the take-up reel after being conveyed as shown in FIG.

The tension of the crystalline metal ribbon was measured by using a liquid float type roll. In this case, in order to convey the sheet-formed metal ribbon from the cooling roll and further wind it on the take-up reel, it is necessary to perform accurate tension measurement with high response speed. In addition, since the crystalline metal ribbon has a temperature of at least several hundreds of degrees immediately after being formed from the cooling roll due to the influence of the heat of solidification, a normal tensiometer cannot be used. Furthermore, in the gas float type tensiometer, the tensiometer cannot fully utilize its performance due to the influence of heat,
In addition, in the case of a metal ribbon, the plate thickness is thicker than that of an amorphous ribbon and may be manufactured from several tens of μm to hundreds of tens of μm. A large liquid float tensiometer was used. As a result, the tension was measured extremely accurately, and by controlling the measured value, it became possible to carry, wind and wind the metal ribbon.

〔The invention's effect〕

As described above, according to the present invention, a metal ribbon such as an amorphous alloy produced by the single roll method can be guided / conveyed and wound at high speed without breaking, so that the production technique Is extremely significant.

[Brief description of drawings]

FIG. 1 is a schematic view of the arrangement of a tension meter in a metal ribbon conveying and winding device, FIG. 2 is an explanatory view of the completion of a pass line configuration in a metal ribbon conveying and winding device to which a tensiometer is added, and FIG. FIG. 4 is a graph showing the relationship between the target tension and the measured tension value when a tension meter using a roll is used. FIG. 4 is an explanatory view of winding a metal ribbon in the tension measuring device and measuring tension at that time.
Fig. 6 is a graph showing the relationship between the winding angle and the tension output when using a tension meter using a gas float type roll, and Fig. 6 is the tension target and the actual tension at the time of carrying, winding and winding the metal ribbon. It is explanatory drawing of the measured value of tension. DESCRIPTION OF SYMBOLS 1 ... Cooling roll, 2 ... Metal ribbon, 3 ... Conveyor trolley, 4 ... Pinch roll, 5 ... Suction blower, 6 ... Winding device, 7 ... Inlet tension device, 8 ... Dancer roll, 9 ... Exit tension device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 62-279057 (JP, A) JP 63-49350 (JP, A)

Claims (5)

[Claims] 1. A quenching metal ribbon is produced by injecting a molten metal onto a surface of a rotating cooling roll through a slit-shaped nozzle, and the quenching metal thin film is wound by a winding device arranged at a position remote from the cooling roll. While continuously winding the strip, a dancer roll device is provided between the cooling roll and the winding device to suspend the quenched metal ribbon, and the displacement of the dancer roll controls the tension of the quenched metal ribbon. A method of performing tensioning of the quenched metal ribbon at least both before and after the dancer roll that is present on the pass line of the quenched metal ribbon without contacting the quenched metal ribbon. A method for diagnosing operation in the production of a quenched metal ribbon, which comprises measuring with a force acting on a probe member having a suspended cylindrical surface, and judging the suitability of an operating state from the measured value. 2. The operation diagnosis method according to claim 1, wherein the probe member is for ejecting gas from the outer peripheral surface to keep the metal ribbon in a non-contact state of a gas float system. 3. The operation diagnosis according to claim 1, wherein the probe member is for ejecting a liquid from the outer surface thereof to keep the metal ribbon in a non-contact state of a liquid float system. Method. 4. When the metal ribbon is conveyed and the line tension of the metal ribbon is measured, the winding angle of the metal ribbon with respect to the probe member is set to 10 degrees or more and 180 degrees or less from the traveling direction of the line, The tension is measured, and the tension is measured.
The operation diagnosis method according to any one of 1. 5. A method for producing a quenched metal ribbon, which is controlled online by displacement of a dancer roll based on the measured value of tension according to any one of claims 1 to 4.