JPH06102259B2 - Method for transporting quenched metal ribbon - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a conveying method for guiding a manufactured quenched metal ribbon to a winding reel.

Although there are many technical difficulties in the transportation of rapidly-quenched metal ribbons, for example, ribbons that are continuously produced at high speed such as amorphous ribbon, there are many technical difficulties, but the present invention provides stabilization of the transportation guide to the take-up reel. It is something that will be realized.

(Prior Art) For example, in the production of an amorphous ribbon, a molten metal is rapidly cooled and solidified on the surface of a cooling roll that rotates at a high speed to continuously produce a ribbon. Particularly, the production of an amorphous ribbon having a thickness of about 30 μm is carried out when the peripheral speed of the cooling roll is around 20 to 40 m / s.

In order to wind the ribbon produced at such a high speed, a special device is required to guide the ribbon.

In Japanese Patent Laid-Open No. 59-43772, air is blown as a driving fluid from a duct-like transfer space that partitions a cavity with a flat rectangular cross section, and the inside of the duct is affected by the pressure drop of the high-speed fluid with respect to the surrounding environment. It is disclosed that the peripheral fluid is sucked and the ribbon is smoothly introduced into the duct and carried out. With this technology, strips are peeled off more stably than the chill rolls and can be conveyed sequentially when the surrounding environmental fluid is not disturbed, but if the strips are clogged in the duct or the stripping point on the chill roll is If it moves up and down unstablely, the ribbon on the duct entrance side is cut.

On the other hand, Japanese Patent Application Laid-Open No. 59-138572 proposes to carry out a thin strip by two brush rolls and apply tension by sliding resistance.
Since it is 30 m / S or more, the progress of the ribbon is unstable, and for example, meandering easily occurs due to a difference in tension, so it is difficult to carry out the ribbon continuously. In order to apply more appropriate tension, it is necessary to apply a large rolling force to the upper and lower brush rolls, and the ribbon is likely to break.

Further, in Japanese Utility Model Publication No. 61-167248, upper and lower pinch rolls,
Although a ribbon transporting device composed of a combination of an air nozzle and a guide conveyor has been proposed, there is no ribbon meandering correction device, and high-speed threading is impossible. Furthermore, in this device, tension applying devices are arranged one after another after the cooling roll,
A large tension is generated in the initial stage of winding, and the ribbon cutting between the cooling roll and the pinch roll is inevitable.

(Problems to be Solved by the Invention) A molten metal is rapidly solidified on the surface of a chill roll that rotates at a high speed, and meandering is corrected when a thin strip such as a continuously produced thin strip is conveyed, and an appropriate tension is applied. SUMMARY OF THE INVENTION It is an object of the present invention to propose a device which can realize stable conveyance by adding the above.

(Means for Solving the Problems) The present invention provides a pinch roll, which is a pair of a brush roll and a solid roll, disposed between a cooling roll and a take-up reel which are used for rapid solidification of molten metal, and a cooling roll surface. Conveying a quenched metal ribbon, which is characterized in that the tension applied to the quenched metal ribbon is controlled within a range of 2 to 8 kgf when it is conveyed through a quenched ribbon manufactured by rapidly solidifying molten metal. Is the way.

The tension is controlled by adjusting at least one of the pressing amount of the brush roll and the solid roll, the rolling force of the brush roll and the solid roll, and the peripheral speed ratio of the brush roll and the cooling roll. It is advantageous.

In the present invention, the pushing amount means that the axial center distance between the two rolls at the time when both the outer peripheral surfaces of the brush roll and the solid roll start contacting with each other is 0, and further pressing is performed to deform the brush roll to push it. In rare cases, the distance between the axes of both rolls becomes narrow, and the amount of contraction of this distance is defined as the "pushing amount".

Referring now to FIG. 1, there is shown a carrier system which is advantageously adapted to the present invention. This device has a pinch roll 1 composed of a brush roll 1a and a solid roll 1b, one end of an arm 3 attached to a rotating shaft 2 of the brush roll 1a is rotatably fixed, and the other end is vertically moved by a pressing cylinder 4. The brush roll 1a can be pressed against the solid roll 1b. The solid roll 1b may be processed into a crown roll that is advantageous for preventing meandering.

The brush roll 1a is formed by flocking metal wire rods such as iron and stainless steel on the peripheral surface of the roll shaft, and particularly when the wire rods are flocked in a spiral shape, the central portion is distributed from both ends of the roll shaft. It is preferable that the winding direction is opposite between the one end side and the other end side of the roll shaft (double helical winding). With this structure, the ribbon passing between the rolls is always positioned at the center of the roll cylinder, and it is possible to prevent meandering and stabilize the conveyance. It should be noted that brush materials other than the above may be appropriately selected depending on the material of the ribbon to be conveyed, and whether the solid roll is crowned or not depending on the conveying speed of the ribbon and the degree of meandering, and the brush. Whether or not the brush of the roll is wound around the double helical may be appropriately selected.

By pressing the brush roll 1a and the solid roll 1b, tension is applied to the ribbon 5 passing between the rolls. The tension can be measured by the tensiometer 6a and the rolling force can be measured by the load cell 6b.

Next, the procedure for transporting the thin strip obtained by the quenching method to the winding device using the above-described device will be specifically described with reference to FIG.

In the figure, 7 is a cooling roll, 8 is a nozzle for supplying molten metal to the peripheral surface of the cooling roll 1, 5 is a ribbon, 9 is an air knife for peeling the ribbon 3 from the cooling roll 7 by jetting air,
10 is a deflor, 11 is a duct hood having a suction port directed in the tangential direction of the cooling roll 7, 1 is a pinch roll arranged behind the duct hood 6, 1a is a brush roll, 1b is a solid roll, and 12 is a pinch roll. A fan arranged downstream, 13 is a trolley for moving the guiding device 14 including the pinch roll 1 and the fan 13, 15 is a winding device, 16 is a revolving wheel,
17,18 Carousel reel, 19 Swing arm, 20
Is a deflor, 21 is a knife, 22 is a press roll, 23 is a dancer roll, 24 and 25 are deflors, and 26 is a tension breaking device.

Now, as shown in FIG. 3A, the molten metal poured from the nozzle 8 is rapidly solidified on the surface of the cooling roll 7 to become the ribbon 5. About the thin roll 5 attached to the surface of the cooling roll 7 and rotating.
Is separated from the cooling roll 7 by the air knife 9. The strip 5 which has been peeled off is introduced from the duct hood 11 into the opening between the rotating brush roll 1a and solid roll 1b, after which the tip of the strip 5 which is the unsteady part is crushed by the fan 12. On the other hand, the remaining thin strip 5 in the stationary portion is pressed down between the brush roll 1a and the solid roll 1b to apply tension. In this state, the thin ribbon 5 has a stable pass line,
Peeling from the cooling roll 7 progresses while contacting the deflor 10.

Next, the guiding device 14 is moved toward the winding device 15 via the carriage 13 while maintaining the tension applied to the ribbon 5. At this time, the relationship among the peripheral speed V ₁ of the pinch roll, the conveying speed V _{2 of the} ribbon and the moving speed V ₃ of the carriage is preferably V ₁ > V ₂ >> V ₃ .

FIG. 2B shows a state in which the ribbon 5 has been passed through the winding device 15 and immediately before being wound around the carousel reels 17 and 18, and the carriage 13
After moving to the rear of the winding device 15, for tension control,
Dancer roll 23, deflor 24, 25, tension breaking device 2
6, the ribbon 5 is brought into contact with the deflor 27 and the deflor 20, and the winding preparation is started. Then, the revolution wheel 16 is rotated to bring the first carousel reel 17 close to the ribbon 5.

Then, as shown in the state immediately before winding in FIG. 7C, the ribbon 5 is cut by the knife 21 to separate the ribbon on the induction device side, and at the same time, the ribbon 5 is pressed by the pressing roll 22 to the carousel reel.
Press on 17. The carousel reel 17 has a thin strip winding function, and continuous winding is started.

It should be noted that it is advantageous to detect the position of the dancer roll 23 and adjust it to an appropriate range to control the speed of the carousel reel and thus provide the ribbon with proper tension.

Further, the tension dividing device 26 divides the tension of the line to maintain a high tension required for winding between the tension dividing device 26 and the carousel reel 17, and a low tension between the tension dividing device 26 and the cooling roll 7. Carry.

(Operation) In the present invention, in the series of operations until the ribbon is wound on the winding device, the ribbon stripped from the cooling roll is guided from the duct hood to the pinch rolls that rotate to apply tension. The tension applied to the ribbon is controlled in the range of 2 to 8 kgf in the transporting movement in which the tension is applied to the ribbon by the pinch rolls through the initial threading and the carriage while maintaining the tension applied to the ribbon. It realizes stable transportation.

Here, the tension applied to the ribbon is set in the range of 2 to 8 kgf because when the tension is less than 2 kgf, the ribbon is loosened and the pinch roll or the duct hood in front of it loosens and the duct hood becomes thin. The belt is broken or sticks out of the pinch rolls, causing plate breakage, making stable transport impossible.

Furthermore, if the tension variation becomes large due to the variation of the stripping point of the ribbon from the cooling roll and the variation of the plate thickness, the vertical vibration of the ribbon becomes large and the pass line becomes unstable. As a result, a trouble such as plate breakage occurring in front of the pinch rolls occurs.

On the other hand, if the tension exceeds 8 kgf, the strip breaks in the pinch roll due to defects (cracks, pits) in the ribbon, or the tension changes abruptly or wraps around the roll due to an increase in the friction coefficient between the brush roll or solid roll and the ribbon. As a result, plate breakage occurs and stable transportation cannot be realized.

Now, in the initial threading, the pushing amount of the brush roll and the solid roll, the rolling force, and the peripheral speed ratio of the pinch roll and the cooling roll are adjusted to predetermined values to give proper tension to the ribbon.

Then, in the transfer movement, the peeling position of the ribbon from the cooling roll fluctuates, the deviation of the thickness of the ribbon occurs, and the meandering of the ribbon causes the tension applied to the ribbon to fluctuate and the conforming range. If it is out of the range, at least one of the pushing amount of the brush roll and the solid roll, the rolling force, and the peripheral speed ratio of the pinch roll and the cooling roll is adjusted to perform tension control.

Next, when a thin strip having a width of 100 mm and a thickness of 30 μm is passed between the brush roll and the solid roll of the conveying device shown in FIG. 1, (1) the pushing amount between the brush roll and the solid roll, An experiment in which the fluctuation of the tension applied to the ribbon is investigated by changing the rolling force between the brush roll and the solid roll and (3) the peripheral speed ratio between the pinch roll and the cooling roll will be described.

FIG. 3 shows the relationship between the pushing amount and the tension between the brush roll and the solid roll during the initial threading. The outer diameter of the brush roll used in this experiment was 200 to 350 mm, and the peripheral speed ratio between the pinch roll and the cooling roll was 1.0.

From the figure, there is a clear correlation between the pushing amount and the tension of the brush roll and the solid roll, and in order to control the tension applied to the ribbon in the range of 2 to 8 kgf, the pushing amount should be within the specified range. You can see that it should be adjusted. It is shown that the appropriate range of the pushing amount in the figure differs depending on the brush material and the wire diameter, and it is necessary to make advance adjustments according to the material and shape of the brush roll.

Further, the pressing force of the brush roll can be treated in the same manner as the pushing amount when the pinch roll is a pair of normal solid rolls, but one of the pinch rolls used in the present invention is a brush roll. In many cases, the pushing amount and the rolling force do not correspond reliably depending on conditions such as material, wire diameter, usage history, and load state on the roll. Therefore, it is also effective to control the tension by adjusting the rolling force of the brush roll, and the correlation between the two is as shown in FIG. In the experiment of the figure, a brush roll of 0.1 mmφ stainless steel wire was used, and the peripheral speed ratio of the pinch roll and the cooling roll was 1.0.
And In addition to this, when the same experiment was performed using brush rolls of various wire rods, the rolling force was reduced to 10 at a peripheral speed ratio of 1.0.
It has been found that a range of ~ 100 kgf is advantageous for holding the tension at 2-8 kgf.

Further, FIG. 5 shows the relationship between the peripheral speed ratio of the cooling roll and the pinch roll and the tension when the brush roll using the plus alloy wire (0.2 mmφ) is pushed with a pushing amount of 1 mm. From the figure, it can be seen that when the peripheral speed ratio is less than 1.0, the tension is as low as less than 2 kgf, while when the peripheral speed ratio exceeds 1.3, the tension exceeds 8 kgf and plate breakage occurs. In addition to the above, the same experiment was carried out for various brush rolls. It was found that adjusting the peripheral speed ratio within the range of 1.0 to 1.3 was advantageous for maintaining the tension within the range of 2 to 8 kgf when the pushing amount was 1 mm. there were.

(Example) Example 1 A reel of a thin strip of Fe-Si-B amorphous alloy produced by a quenching method was used by using the transporting device shown in Fig. 1 to which a solid roll and a brush roll having the following structures were applied. Peripheral speed of hesolid roll and brush roll: 33m / s
Regarding the amount of pushing into the brush roll, the rolling force, and the peripheral speed ratio of the pinch roll and the cooling roll in the initial passage, as shown in Table 1, tension, meandering amount and stability The results of the examination are also shown in Table 1.
For comparison, Table 1 also shows the results of the same measurement for the example using the brush roll pair and the example using the solid roll pair.

Note (1) Solid roll (crown roll) Roll diameter Center part: 201mm Both ends: 200mm Roll axis length: 250mm Roll material: S45C (2) Brush roll Roll diameter: 200mm Roll axis length: 250mm Roll axis diameter: 50mm Roll axis Material: S45C Brush wire diameter: 0.1mm Material of brush wire material: Stainless Steel Winding structure of brush wire: Left-handed, right-handed toward the center of the thin plate with respect to the moving direction of the thin plate by the center distribution of the brush roll body length. Double helical winding Next, in the initial passing of the ribbon and the subsequent transfer movement,
An example in which tension fluctuation is controlled and a comparative example are shown.

Example 2 Using the transport device shown in FIG. 1 to which a solid roll and a brush roll having the configurations shown below are applied, a thin strip of Fe-Si-B amorphous alloy prepared by a quenching method is transported to a winding reel. When 4 kgf of tension was applied to the ribbon and the initial threading was performed, the tension fluctuated 2 seconds after the initial threading. However, by adjusting the pushing amount,
As shown in FIG. 6, it was possible to perform stable winding with a small fluctuation in tension throughout. The initial striping condition is the pushing amount: 0.5
mm, rolling force 20 kgf, and peripheral speed ratio 1.2.

(1) Solid roll (flat roll) Roll diameter: 80mm Roll shaft length: 170mm Roll material: S45C (2) Brush roll Roll diameter: 80mm Roll shaft length: 170mm Roll shaft diameter: 25mm Roll shaft material: S45C Brush wire diameter : 0.2mm Material of brush wire: Stainless fiber Wound wire of brush wire Structure: Close spiral winding (right or left winding in the length direction of the brush roll) Comparative Example 1 Pinch that is paired with the solid roll shown below When a Fe-Si-B amorphous ribbon was guided to a pinch roll using a transport device to which a roll was applied and the ribbon was captured, a tension fluctuation as shown in Fig. 7 occurred and the ribbon was cut after a few seconds, Could not be transported to the take-up reel.

Note (1) Solid roll (upper pinch roll-crown roll) Roll center: 83mm Both ends: 80mm Roll shaft length: 70mm Roll material: S45C (2) Solid roll (lower pinch roll-flat roll) Roll diameter: 80mm Roll axis length: 70 mm Roll material: S45C Comparative example 2 Using the transport device to which the pair of brush rolls, which are paired with the brush roll shown below, is applied, the Fe-Si-B amorphous ribbon is guided to the pinch roll to capture the ribbon. As a result, the tension was loosened as shown in FIG. 8 and the ribbon was meandering, and eventually it was cut and could not be conveyed to the take-up reel. The peripheral speed ratio between the chill roll and the pinch roll (brush roll) decreased to 0.9, causing slack in the ribbon. Therefore, the peripheral speed ratio was set to 1.0 or higher and the rolling force was set to 20 kgf or higher, but the loose tension was eliminated. As a result, cutting of the ribbon could not be avoided.

Note Brush roll (both upper and lower) Roll diameter: 80mm Roll shaft length: 170mm Roll shaft diameter: 25mm Roll shaft material: S45C Brush wire diameter: 0.2mm Brush wire material: Stainless fiber Winding brush wire Structure: Close spiral winding Comparative Example 3 Fe-Si-B amorphous alloy thin film prepared by the quenching method using the conveying device of FIG. 1 to which the solid roll and the brush roll having the same structure as in Example 1 were applied. When transporting the strip to the take-up reel, a thin strip was captured with a rolling force of 100 kgf and a peripheral speed ratio of 1.3 between the pinch roll and the cooling roll, and the tension was 10 k
After 2 seconds from the initial threading with gf, when moving to the take-up reel, the peeling point on the cooling roll fluctuated and the rolling force was 150 kgf.
, The ribbon was cut and could not be wound before the rolling force was reduced.

(Effect of the Invention) As described above, according to the present invention, a quenching ribbon represented by a single roll method or a melt drag method, for example, a ribbon that is continuously produced at high speed such as an amorphous ribbon is used as a cooling roll. Stable conveyance can be realized by correcting the meandering and applying an appropriate tension in the conveying process from the peeling to the take-up reel.

[Brief description of drawings]

FIG. 1 is an explanatory view of a transfer device according to the present invention, FIGS. 2 (a) to 2 (c) are explanatory views showing a transfer procedure of a ribbon, and FIG. 3 shows a relationship between tension and a pressing amount of a brush roll. Graph, FIG. 4 is a graph showing the relationship between tension and the peripheral speed ratio of the pinch roll and cooling roll, FIG. 5 is a graph showing the relationship between tension and the rolling force of the brush roll, and FIGS. It is a graph which shows tension and fluctuation at the time of belt transportation. 1 ... Pinch roll, 1a ... Brush roll 1b ... Solid roll, 2 ... Rotating shaft 3 ... Arm, 4 ... Suction cylinder 5 ... Strip, 6a ... Tensometer 6b ... Load cell, 7 ... … Cooling roll 8 …… Nozzle, 9 …… Air knife 10 …… Deflor, 11 …… Duct hood 12 …… Fan, 13 …… Truck 14 …… Induction device, 15 …… Winding device 16 …… Revolution wheel 17, 18 …… Carrousel reel 19 …… Swing arm, 20 …… Deflor 21, 21… Knife, 22 …… Dancer roll 23,24… Deflor, 26 …… Tension breaking device

Claims (2)

[Claims] 1. A pinch roll, which is a pair of a brush roll and a solid roll, disposed between a cooling roll and a take-up reel used for rapid solidification of molten metal, and is manufactured by rapidly solidifying molten metal on the surface of the cooling roll. A method for transporting a quenched metal ribbon, characterized in that, when transporting through the quenched ribbon, the tension applied to the quenched metal ribbon is controlled within a range of 2 to 8 kgf. 2. The tension is controlled by adjusting at least one of the pushing amount between the brush roll and the solid roll, the rolling force between the brush roll and the solid roll, and the peripheral speed ratio between the pinch roll and the cooling roll. The method according to claim 1, wherein