JPS6349350A - Method and equipment for producing rapid cooling strip - Google Patents

Abstract

PURPOSE:To easily wind a material having low ductility at high temp. without any strip breakage by passing the strip under loop-forming absorbing fluctuation of tension caused by fluctuation of winding speed at a part from just after solidification by rapid cooling to reaching to winding machine. CONSTITUTION:Molten metal 1 is supplied to a part between cooling rolls 3, 3, from a supplying nozzle 2 and after changing the advancing direction of a metallic strip 4, which is solidified by cooling rapidly, by pinch rolls 5, the strip is wound to a winding machine 8 under tension control by a tension measuring device 7 through cooling zone 6. Then, by adjusting the number of revolution for the cooling rolls 3, the loop of strip 4 is formed at the region between the cooling rolls 3 and pinch rolls 5 to hold the slack at the hot temp. part in the strip 4. Further, the lowest position of loop for the strip 4 is observed by a loop lowest position measuring device 9, and the lowest position of loop is controlled, so as to position always at the aimed range. In this way, the material having little ductility at high temp. is easily wound without any strip breakage.

Description

[Detailed Description of the Invention] (Industrial Application Field) This specification describes the results of research and development regarding the method and equipment for manufacturing a quenched ribbon, particularly for easily winding materials with low ductility at high temperatures. .

The manufacturing method of quenched ribbon using twin rolls or a single cooling roll as a surface moving at high speed involves supplying molten metal onto the cooling surface moving at high speed, and immediately cooling it by removing heat from the cooling surface moving at high speed. A common process is to form a metal ribbon into a thin ribbon, cool the resulting metal ribbon in a cooling zone, and then wind it into a coil using a winder provided in a downstream process.

(Prior art) In the above process, if a speed difference occurs between the cooling surface that moves at high speed, such as a cooling roll, and the take-up reel of a winding machine, there is a risk that the metal ribbon may break or meander. There is.

As a solution to this problem, for example, Japanese Patent Application No. 60-28
As disclosed in the specification of No. 1066, the winding tension of the metal ribbon is constantly monitored by a tension measuring device, and the winding speed is adjusted according to the difference between the set tension value and the measured value to maintain a constant tension at all times. A method of winding it up at the bottom is known.

When manufacturing common steel, silicon steel, stainless steel, etc. by the quenched ribbon method, stable winding was possible by adjusting the winding speed as described above.

However, as the advantages of the quenched ribbon method have attracted attention, various materials that were previously thought to be unrollable have come to be handled by the quenched ribbon method, and plate breakage during winding has become a problem. In particular, it has been found that materials such as permalloy, which have very low elongation at high temperatures, frequently break.

If the winding speed of the metal ribbon increases slightly for some reason, there will be no slack in the pass line of the metal ribbon, so
Variations in winding speed cause elongation in the high temperature region where deformation resistance is low, which can easily lead to plate breakage depending on the material.

(Problems to be Solved by the Invention) Therefore, it is an object of the present invention to propose a method for manufacturing a quenched ribbon that can easily wind up a material with low ductility especially at high temperatures without causing plate breakage.
Furthermore, it is an object of the present invention to provide manufacturing equipment suitable for carrying out the method.

(Means for Solving the Problems) In this invention, molten metal is continuously supplied onto a cooling surface moving at high speed, rapidly solidified into a thin ribbon, and then passed through a cooling zone to a winding machine. In manufacturing the quenched ribbon through a series of steps, from immediately after quenching and solidification to the winding machine, the ribbon is formed into a loop that absorbs tension fluctuations caused by fluctuations in the winding speed. This is a method for manufacturing a quenched ribbon, which is characterized by passing the sheet through it.

The present invention also provides a cooling surface that moves at high speed to force rapid solidification of molten metal into a ribbon, a cooling zone that cools the ribbon, and a winder that winds up the ribbon that has exited the cooling zone. A device for measuring the lower end position of a loop formed by slack in a ribbon between the pinch roll and the cooling surface, in a manufacturing facility having a pinch roll arranged between the cooling surface and the winding machine. and a means for adjusting the moving speed of the cooling surface or the rotational speed of the winder based on the measured position signal, and a high-speed manufacturing equipment for forcing molten metal to rapidly solidify into a ribbon. In manufacturing equipment that has a cooling surface that moves at a speed, a cooling zone that cools the ribbon, and a winder that winds up the ribbon after leaving the cooling zone, there is a space between the cooling surface and the winder. , a device for detecting the displacement of the looper, which detects the displacement of the looper, and detects the moving speed of the cooling surface or the rotation of the winding machine based on the detected displacement signal; This is a manufacturing facility for quenched ribbon, which is equipped with means for adjusting the number of quenched ribbons.

In producing the 15-quenched ribbon, any conventionally known method can be used, such as a single roll method, a twin roll method, a rotating drum method, and a rotating belt method.

Now, this invention will be specifically explained with reference to the drawings.

FIG. 1 shows a preferred example of a manufacturing facility for a quenched ribbon according to the present invention, which is suitable for forming a loop between a cooling roll and a pinch roll. In the figure, 1 is the molten metal, 2 is the supply nozzle, 3 is the cooling roll, 4 is the metal ribbon, 5 is the pinch roll, 6 is the cooling zone, 7 is the tension measuring device, 8 is the winding machine, and 9 is the loop. This is a lower end measuring device.

First, the molten metal 1 supplied from the supply nozzle 2 is rapidly solidified by a pair of cooling rolls 3.3 to become a metal ribbon 4.Then, the obtained metal ribbon 4 is changed in its traveling direction by a pinch roll 5, and is transferred to a cooling roller pair 3.3. 6, and is wound into a coil by a winder 8 under tension control that keeps the winding tension constant based on the measurement value of the tension measuring device 7. In this line, the rotational speed of the cold roll 3 is adjusted to form a loop of the metal ribbon 4 in the region between the cooling roll 3 and the pinch roll 5, and the high temperature part of the metal ribbon 4 is loosened. to have. The lower end of this loop is monitored by a loop lower end measuring device 9, and the rotational speed of the cooling roll 3 or the take-up reel of the winder 8 is adjusted so that the lower end is always located within the target range.

Note that a linear image sensor or the like is suitable as the loop lower end measuring device 9.

Examples of other manufacturing equipment are shown in FIGS. 2 to 8, respectively.

FIG. 2 shows an example of equipment suitable for forming a loop between the cooling zone 6 and the winder 8.

In addition, FIGS. 3 and 4 show that between the cooling roll 3 and the cooling zone 6,
This is an example of equipment suitable for forming a looper.

In other words, the looper 10 shown in FIG. 3 uses a looper car 11, and when the tip of the metal ribbon passes through the pinch roll 5, the looper 11 from the standby position moves to a predetermined position, forming a loop. Ru. The looper 10 is equipped with a motor for applying a force FO of the same magnitude in a direction opposite to the tension TO, and a device for detecting deviation from a predetermined position. If the tension To suddenly increases and To>EO, the Louver car 11 moves to the left.

Depending on the amount of movement, the speed of the winder or cooling roll is reduced and the tension is reduced. Therefore, Rubaker 11 is FO
It returns to the specified position with the force of .

The looper 10 shown in FIG. 4 uses an arm 12,
As soon as the tip of the metal ribbon passes through the pinch roll 5, the roll 13, which had been waiting below the pass line, is pushed up above the pass line by the rotational movement of the arm 12, thereby forming a loop.

The looper 10 is equipped with a spring or cylinder for pushing the arm 12 upward and a device for detecting deviation from a predetermined position. The behavior of the looper when the tension varies is similar to that shown in FIG.

Note that the traveling direction of the gold gA ribbon 4 is changed by a pinch roll 5 on the entrance side of the cooling zone 6, but the pinch roll is changed to a deflection roll, and the tension required for winding is controlled by the looper 1.
A configuration in which the signal is generated at 0 may also be used.

FIG. 5 shows an example of equipment suitable for forming a looper between the cooling zone 6 and the winder 8. That is, dancer roll 14
The length of the loop can be adjusted by moving it up and down using an air cylinder 15.

FIG. 6 shows an example of equipment suitable for looper control, in which the winding tension is measured by a load cell 17 attached to the bearing of the side roll 16, and the dancer roll
This is to raise and lower 4.

Further, although the explanation has been given using the twin roll method as an example, the present invention is also advantageously applicable to cases where a single roll method, a centrifugal method, etc. are used.

(Function) Here, the pinch roll 5 is used to roll the metal ribbon 4 up to the winder 8.
In addition to applying tension to the winding speed and making stable winding possible even when the winding speed fluctuates, it also absorbs some of the tension fluctuations during winding and prevents tension fluctuations from propagating to the high temperature side of the thin metal i4. It also works to reduce

The tension fluctuations that cannot be absorbed by the pinch rolls 5 are absorbed by the loop formed between the cooling roll 3 and the pinch rolls 5, and the tension fluctuations do not affect the metal ribbon 4 immediately after being rapidly solidified. .

In addition, when manufacturing a material without the risk of plate breakage, it is sufficient to pass the plate without forming loops, and no changes to the equipment are required.

In addition, do not wind with a tension higher than the breaking strength of the plate at high temperatures (unless stable winding is not possible, there is no need for pinch rolls to break up the tension, so the equipment can be configured easily). . In this case, tension fluctuations in the ribbon can be sufficiently absorbed and eliminated by the loop of the ribbon. Further, when dealing with a low melting point metal such as aluminum, or when the high melting point plate is sufficiently thin, the cold W band can be omitted and the configuration of the apparatus can be simplified. In this case as well, fluctuations in the tension of the ribbon can be absorbed and eliminated by the loops of the ribbon, and the equipment shown in FIG. 7, for example, is advantageously suitable.

On the other hand, if the temperature of the manufactured ribbon is sufficiently high, it is necessary to provide another cooling zone downstream in addition to the cooling zone mentioned above.
In this case as well, it is possible to absorb tension fluctuations by the loop, and for example, the example of equipment shown in FIG. 8 is suitable.

(Example) Using the manufacturing equipment shown in FIG. 1, a metal ribbon was manufactured under the following conditions.

Experimental conditions (1) l1m type: Permalloy 2) Metal ribbon shape Plate width: 200m++ Plate thickness: 0
,4n (3) Twin roll circumferential speed (set value): ,11/S<4) Winding tension (set value): 1. Okg/mj (5) Loop total length (distance from the bottom end of the loop to the pinch roll as shown in Figure 1): 2m The upper limit of the variation in the position of the bottom end of the loop during the experiment is 50OI! FIG. 9 shows the changes in the loop lower end position and the winding tension value when controlled to be 11.

As shown in the figure, if the loop was formed with the lower end position within the target range, the plate would not break even if tension fluctuation occurred, and a coil of approximately 500 kg could be wound.

In the above embodiments, the manufacturing equipment example shown in FIG. 1 was described, but similar results were obtained with the manufacturing equipment examples shown in FIGS. 2 to 8.

That is, when the loop 10 is installed in front of the cooling zone 6 as shown in Figure 3.4, the loop 10 is placed in front of the cooling zone 6 as shown in Figures 2.5 and 6 for a permalloy thin plate with a thickness of 0.4 mm. When forming loops later, use 0.4, which has higher high temperature strength than permalloy.
For silicon steel plates and stainless steel plates with a thickness of mm, or when a cooling zone is not required as shown in Figure 7, 0.4 + I
For an aluminum plate with a thickness of m, and as shown in Fig. 8,
When a stage cooling zone is required, thin permalloy plates with a thickness of 1 and 0 m+a were wound under the same conditions as in the above example, and similar results were obtained.

(Effects of the Invention) According to the present invention, even materials with low ductility at high temperatures can be wound without sheet breakage, and the range of materials that can be manufactured by the quenched ribbon method is expanded, and metal ribbon can be supplied at low cost.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a preferred example of the manufacturing equipment for the quenched ribbon according to the present invention, Figs. 2 to 8 are explanatory diagrams showing other preferred examples of the manufacturing equipment, and Fig. 9 is an explanatory diagram showing the lower end position of the loop and winding. It is a graph showing tension. 1... Molten metal 2... Supply nozzle 3...
・Cooling roll 4... Metal thin strip 5... Pinch roll 6... Cooling zone 7... Tension measuring device
8... Winder 9... Loop bottom end measuring device 10... Louver 11... Louver car 12... Arm 13...
...Roll 14...Dancer roll 15
...Air cylinder 16...Side roll 17
...Load cell Figure 1 Figure 2

Claims (1)

[Claims] 1. A series of steps in which molten metal is continuously supplied onto a cooling surface moving at high speed, rapidly solidified into a thin ribbon, and then passed through a cooling zone and wound up with a winder. In manufacturing the rapidly cooled ribbon, the ribbon is passed through a loop that absorbs tension fluctuations caused by fluctuations in the winding speed, from immediately after the rapid solidification to the winding machine. A method for producing a quenched ribbon. 2. The method for producing a rapidly cooled ribbon according to claim 1, wherein the loop for absorbing tension fluctuations is formed immediately after the rapid solidification and before entering the cooling zone. 3. The method for producing a quenched ribbon according to claim 1, characterized in that a loop for absorbing tension fluctuations is formed between the cooling zone and the winder. 4. Manufacturing comprising a cooling surface that moves at high speed to force rapid solidification of molten metal into a ribbon, a cooling zone that cools the ribbon, and a winder that winds up the ribbon that exits the cooling zone. In the equipment, a pinch roll is disposed between the cooling surface and the winding machine, and a device for measuring the lower end position of a loop formed by slack of the ribbon between the pinch roll and the cooling surface;
A quenched ribbon manufacturing facility comprising means for adjusting the moving speed of a cooling surface or the rotational speed of a winder based on a measured position signal. 5. The quenched ribbon manufacturing equipment according to claim 4, characterized in that a pinch roll is disposed on the inlet side of the cooling zone. 6. The quenched ribbon manufacturing equipment according to claim 4, characterized in that a pinch roll is disposed between the cooling zone and the winder. 7. Manufacturing comprising a cooling surface that moves at high speed to force the rapid solidification of molten metal into a ribbon, a cooling zone that cools the ribbon, and a winder that winds up the ribbon that exits the cooling zone. In the equipment, a looper is disposed between the cooling surface and the winding machine to absorb tension fluctuations in the ribbon due to fluctuations in winding speed,
A quenched ribbon manufacturing facility comprising a device for detecting the displacement of the looper, and means for adjusting the moving speed of the cooling surface or the rotation speed of the winder based on the detected displacement signal. 8. The quenched ribbon manufacturing equipment according to claim 7, characterized in that a looper is disposed between the cooling surface and the cooling zone. 9. The quenched ribbon manufacturing equipment according to claim 7, characterized in that a looper is disposed between the cooling zone and the winder.