JPS6320624B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing a liquid-quenched ribbon, and particularly relates to a manufacturing apparatus for manufacturing a liquid-quenched ribbon, and particularly for manufacturing metals (including alloys) and semi-metals having at least one of amorphous or microcrystalline structures. This paper proposes an apparatus for directly manufacturing ribbons made of molten materials such as molten materials by a rapid cooling method.

As an apparatus for manufacturing an amorphous or microcrystalline ribbon, an apparatus is known in which a molten material is jetted from a nozzle onto the rotating surface of a rotary cooling body to rapidly solidify it. In this device, the rotary cooling body is 1
A configuration using one metal rotating roll and two metal rotating rolls that rotate in contact with each other is known. Devices using one metal rotating roll can be further divided into two types.

The first is a device that is usually applied to a method called the single-roll method, which uses the outer circumferential surface of a rotating roll as a cooling surface and continuously jets out the molten material while keeping the nozzle fixed, resulting in continuous rapid solidification. The second is a device that is applied to a method usually called centrifugal quenching method, which uses the inner peripheral surface of a rotating cylindrical drum as a cooling surface and moves the nozzle in the direction of the rotation axis. This equipment continues to eject molten metal while keeping it in close contact with the inner circumferential surface of a cylinder due to centrifugal force, and rapidly solidifies it to produce a rapidly solidified ribbon that is relatively narrow in width and is wound helically around the inner circumferential surface of the cylinder. It is.

By the way, according to one of the conventional devices that follows the centrifugal quenching method in which the inner peripheral surface of one of the rotating cylindrical drums is used as a cooling surface, the molten material spouted onto the inner peripheral surface of the drum is cooled to the inner peripheral surface after being rapidly solidified. Since the nozzle travels in close contact with the material, the nozzle position is moved in the direction of the rotation axis as described above in order to avoid overlapping and ejecting the rapidly solidified material that is in close contact again after one revolution. Since it is wound helically around the inner circumferential surface of the cylinder, it is inevitably difficult to produce a long ribbon using this device, and the finished product has a helical, twisted shape. Due to the irregular shape, the method was not a practical industrial manufacturing device.

On the other hand, other conventional devices, namely the single roll method, and the 2
According to a device that uses a method using two rolls (hereinafter referred to as the twin roll method), the molten material jetted from a nozzle adheres to the outer circumferential surface of the roll or is quickly solidified into a thin film by being sandwiched between the outer circumferential surfaces of two rolls. It forms a band, immediately flies through space and deposits on the floor.
When actually manufacturing on a mass production scale, the number of lengths
It becomes a ribbon of 100 meters or more, and the molten material must be directly and continuously wound immediately after it is spouted and quenched to form a ribbon.
Actual production will be difficult. However, since the thin ribbon produced by the above device flies through space at a high speed of 20 to 60 m/s, the tip of the ribbon can be successfully captured and, if necessary, passed through a gap such as a pinch roll to wind it up. It is very difficult to wind a thin ribbon around a drum, especially when trying to wind a relatively fragile thin ribbon such as semiconductor material, ferroelectric material, semi-metal, or sendust alloy. In practice, it was impossible to wind up the material because it would be damaged by the impact force received when it was captured.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus for manufacturing a liquid-quenched ribbon, which eliminates and improves the disadvantages of conventional apparatuses, particularly the difficulty in winding the ribbon. As an effective means for achieving this, the present invention provides the following: By supplying molten material through a nozzle to the inner peripheral surface of a rotating cooling drum and cooling and solidifying it,
In the apparatus for sequentially generating ribbons in the rotational direction of the inner circumferential surface of the cooling drum, the winding includes a ribbon capturing means at a position on the rotational downstream side of the cooling drum, spaced from a molten material supply position in the cooling drum. A take-up drum is disposed, and in the cooling drum between the molten material supply position and the take-up drum installation position, a pinch roll is provided for pressurizing and sending out a ribbon produced along the inner circumferential surface of the cooling drum; We propose an apparatus for manufacturing a liquid quenched ribbon, which is characterized by being equipped with a control roll for adjusting the tension of the produced and conveyed ribbon, and a sensor for detecting the time when the tip of the conveyed ribbon passes.

The thin strip capturing means attached to the winding drum includes magnetic attraction, attraction due to air flow, adhesive force due to adhesive, and a thin strip catching means that runs along the outer peripheral surface of the winding drum at the same circumferential speed. A structure is adopted in which any one of the mechanical gripping forces for sandwiching the continuous ribbon on the outer circumferential surface of the winding drum is generated by a belt.

Next, the present invention will be explained in detail.

According to the present invention, after being rapidly cooled and solidified, the rotary winding drum is placed in contact with the inner circumferential surface of the cooling drum or provided with a very small gap therebetween, and then the inner circumferential surface of the cooling drum is moved along the inner circumferential surface of the cooling drum by centrifugal force. It is possible to capture the thin ribbon that is running in close contact and wind it up continuously.

The apparatus of the present invention will be explained with reference to the principle diagrams shown in FIGS. 1A, B, and C.

FIG. 1A shows the state before the start of winding, B shows the state during winding, and C shows the longitudinal section before the start of winding.

As far as possible from the downstream point of the molten material jetted from the nozzle 2 almost inscribed in the inner circumferential surface of the cooling drum 1, which has a large diameter, for example, an inner circumferential diameter of about 500 to 2000 mm, for example, a position 240 degrees to the right. For example, the winding core diameter 100 to 400 mm located directly above the
The winding can be carried out continuously by using the winding drum 3 of approximately 200 mm. When manufacturing a liquid quenched ribbon using a conventional device, the leading end of the ribbon travels or flies at a constant high speed, for example, 20 to 60 m/s, so the leading end is captured by a winding drum. However, with the device of the present invention, the rapidly solidified ribbon can be run along the cooling surface, so it can be reliably passed into the gap (usually 0.5 mm or less) between the winding drum and the cooling drum. Since the ribbon can be fed in, it can be completely captured by the winding drum.

In the apparatus of the present invention, if the ribbon running along the inner peripheral surface of the cooling drum is made of a magnetic material, if a large magnetic attraction force is formed on the surface of the winding drum by a magnetic circuit, the catching force of the winding drum can be strengthened. For more general materials, including magnetic materials, there is a method in which the rotating shaft of the winding drum is made hollow, and air flows through the winding drum through a number of holes on the drum surface to attract the ribbon. There is a method in which an adhesive is applied to the surface of the winding drum in advance and the tip of the running thin strip is glued, or a pulley 4, 4',
The belt 5 is made to run at the same circumferential speed via the
It can be captured by any one of mechanical capture means in the gap between the outer peripheral surface of the winding drum and the belt 5, or by a combination of these means.

Note that a scraper O may be provided at a portion where the cooling drum 1 and the winding drum 3 are close to each other, so that the running ribbon can be easily peeled off from the inner circumference of the drum. According to the apparatus of the present invention, when the ribbon is captured by the suction force of the winding drum, the circumferential speed of the winding drum is the same as the circumferential speed of the inner circumferential surface of the cooling drum or slightly (1 % or less), and then, when the ribbon is wound around the winding drum several times, for example, the tip of the running ribbon is detected by an infrared temperature sensor 6, and the output is sent to a timer to set an appropriate time. By doing this, the winding motor can be rotated by automatically switching to a preferable control method, and winding can be carried out in an orderly manner.

In order to perform winding in an orderly manner, it is advantageous to wind the ribbon while applying tension to the extent that it will not damage the ribbon as it inevitably runs. To avoid this, the pinch roll 7 is elastically rotated in contact with the molten material at a position intermediate between the position where the molten material flows down and the position where it is wound up by the winding drum, and runs along the inner circumferential surface of the cooling drum. The ribbon is conveyed by being sandwiched between the inner peripheral surface of the cooling drum and the outer peripheral surface of the pinch roll. Apply an appropriate pressure of Kg to 50Kg to the pinch roll 7,
By rotating the pinch roll 7 at a circumferential speed that is approximately the same as the cooling drum inner circumferential speed within the range of +0.2%, almost no tension is applied to the ribbon between the pinch roll and the flow point. The ribbon can be wound with sufficient tension applied to the ribbon between the pinch roll and the winding drum.

According to the device of the present invention, as described above, after the winding motor has been wound several times from the initial constant speed, any one of the following controls is performed: constant torque control, constant tension control, slack control that applies a constant load, winding diameter control, etc. By switching the means, the ribbon can be wound up while applying appropriate tension.

If the winding drum is operated under the initial constant speed control, the winding diameter of the winding drum will gradually increase. gradually increases, and the ribbon breaks, or the limit of the braking effect of the pinch rolls is exceeded, and extra tension is applied to the ribbon between the pinch rolls and the flow point, causing damage to the quenched ribbon formation location at the flow point. This will have a negative impact.

No matter which control means is used, unless a certain amount of tension is applied to the coil, the ribbon coil wound around the drum will lose its shape and cannot be wound in an orderly manner.

According to the apparatus of the present invention, the control roll 8 is placed between the pinch roll 7 and the winding drum, or at a position upstream of the winding drum so as to initially contact the inner peripheral surface of the cooling drum.
A damper is provided to absorb the excessive tension that tends to occur during winding, and a dancer is used to control sag. By using a control roll as a roll or a tension detection roll for tension control, the tension applied to the ribbon can be kept within an appropriate range.

As described above, according to the apparatus of the present invention, even with a configuration in which only a winding drum, a pinch roll, a control roll, and a sensor for detecting the tip passage time are disposed in the cooling drum, a long liquid quenching thin film can be processed. The belt can be easily wound without breaking.

However, in the case of the apparatus of the present invention, an accessory device such as a cooling roll or a cooling medium injection device may also be provided at the molten metal spouting position on the inner circumferential surface of the cooling drum. For example, if a cooling roll is provided as an accessory device, the screen of the ribbon can be smoothed and even the thickness can be controlled. On the other hand, if the precision of the ribbon thickness is not required so much, the cooling roll is not necessary. In addition,
In the case where this cooling roll is not installed, it is easier to control the circumferential speed because the cooling roll, which needs to be rotated in synchronization with the cooling drum, is not used, as will be described later. It is also easy to control.

In other words, an example in which a cooling roll is installed is one in which one cooling roll 9 with a diameter of about 100 to 400 mm is arranged at the nozzle ejection position so as to be inscribed in the inner peripheral surface of the large diameter cooling drum 1, and the cooling rolls 9 are identical to each other. By rotating the material at a circumferential speed and elastically sandwiching the flow of the molten material with a pressure of several tens to several hundreds of kilograms and rapidly cooling it from both sides, both surfaces can be made smooth and the thickness can be controlled. I can do it.

Furthermore, in the apparatus of the present invention, the inner circumferential surface of the cooling drum 1 and the outer circumferential surface of the internal cooling roll 9 are
It is also possible to attach an accessory device that automatically polishes and cleans while the device is in operation, and it is also possible to send a cooling medium such as gas, water, oil, etc. from inside the cooling drum 1 or cooling roll 9 through the rotating shaft. It is also possible to cool the cooling drum or the cooling roll to prevent the temperature from rising. In particular, the outer peripheral surface or the disc-shaped portion of the cooling drum 1 can be directly cooled using these refrigerants. When a liquid refrigerant is used, it can also be sprayed under pressure onto the surface of the object to be cooled to improve heat exchange efficiency.

According to the device of the present invention, a part or the whole of the device can be constructed and operated in an atmosphere of an inert gas, a reducing gas, etc., or in a container under a reduced pressure atmosphere of these gases, the atmosphere, or a vacuum. It is also possible to eliminate these problems, particularly when the obtained ribbon is easily oxidized by the atmosphere or when gas bubbles are easily entrained on the surface of the ribbon.

Next, a drawing of one embodiment of the manufacturing apparatus of the present invention will be described.

In FIGS. 2A and 2B, a smaller cooling roll 9 having a diameter of 100 to 400 mm and rotating at high speed is provided so as to be in contact with the inner peripheral surface of the rotating cooling drum 1 having a diameter of 500 to 2000 mm.

A nozzle 2 for spouting molten material is provided near the contact portion between the cooling drum 1 and the cooling roll 9. The bearing spindle 11 placed on the radial feed table 10 and the cooling roll 9 are moved together so that the cooling drum can be pressurized by the cooling roll. This pressurization can be performed by a screw feeding mechanism or a hydraulic mechanism. In addition, a manual feed table 12 in the direction of the rotation axis is further provided below the tape 10 for feeding in the radial direction to improve positioning accuracy.
Workability can be improved. The rotation of the inscribed cooling roll 9 can of course be obtained by highly controlling the speed of a DC motor, but in this embodiment, the rotation transmission shaft supported on both sides of the large diameter cooling drum 1 is controlled by a synchro belt or a timing belt. The power is then transmitted via pulleys 13, 14, and 15 by a combination of the number of teeth at a speed increasing ratio that corresponds to the diameter ratio of the cooling drum and the cooling roll. The cooling drum 1 and the cooling roll 9 may be made of various materials with high hardness, excellent wear resistance, and good thermal conductivity, such as hot die steel, die steel, bearing steel, cemented carbide, and nickel-based heat-resistant alloy. , cobalt-based heat-resistant alloys, carbon tool steel, beryllium copper, and other various alloys can be used.

Next, winding will be explained. In the present invention, the constant speed control of the take-up motor can be switched to other various take-up control methods as necessary. In order to set the switching timing, an infrared temperature sensor 6 whose set temperature can be changed is installed downstream of the molten metal spouting position (immediately after the flow point).

For example, when the temperature sensor 6, which is set at a certain temperature, detects that the tip of the ribbon having a temperature higher than the set temperature has passed, the detection signal (electrical output) is
is input to a digital high-sensitivity timer attached to the winding drum. This timer can automatically switch to a winding control method such as constant torque control in a short time of 0.01 to 0.1 seconds. In short, after winding has been completed several times at an initial constant speed, changes in the temperature of the ribbon are sensed and the sensor and timer switch to constant torque control or constant tension control, so that the ribbon is always kept at an appropriate tension. Wind it up so that it is added. In short, by accurately understanding the position and temperature of the ribbon running along the inner peripheral surface of the cooling drum, the winding drum can be optimally controlled within the short time it takes for the tip of the ribbon to reach the winding drum. This also applies to the system.

As the pinch roll 7, a metal roll whose surface is coated with heat-resistant synthetic rubber or synthetic resin can be used, and the roll bearing spindle 17
A feed table 18 equipped with a screw feed or hydraulic pressure mechanism that moves downward in the radial direction can be provided, and a feed table 19 in the direction of the rotary shaft can be provided below it to improve positioning accuracy and workability.

The control roll 8 in the same figure can swing around the rotating shaft 20 as a fulcrum, and the extension of the arm 21 that supports the roll 8 is equipped with the following various types of control according to the control method of the winding motor 22. Attach any of the equipment. For example, by applying a spring that has constant torque and constant load characteristics with respect to deflection, install a spring structure, air spring, or air balancer structure that has optimal torque and deflection characteristics for controlling the winding motor. Alternatively, a strain gauge type load cell, a tension detector constituted by a semiconductor type load detector, etc. can be installed in this part.

The winding drum 3 in the device of the present invention is composed of a magnet roll with a magnetic circuit designed to increase the suction force, and a rotary joint 33 for sucking air is provided at the end of the rotating shaft, and a pulley 2
3, 24, 25, 29 synchro belt 26, 27
The DC motor 22 receives conduction through the DC motor 22 . The control system for the winding drum 3 receives a signal from the infrared sensor 6, and the timing is adjusted by the timer, and the winding motor is controlled by constant torque control, constant speed winding thickening control, slack control, and constant tension. At the same time, the air cylinder 30 installed directly above the winding drum spindle 28 is operated to prevent trouble from occurring due to an increase in the winding diameter due to thickening of the winding drum. A feeding mechanism section 31 for lowering the is provided. At this time, if the winding motor 22 is fixed, play will occur in the synchro belts 26 and 27, so in order to prevent this play, a mechanism 32 for sliding the pulleys 24 and 29 can be provided.

Next, the present invention will be explained with reference to examples.

Example 1 In the apparatus shown in Fig. 1, the outer diameter of the cooling drum is
1050mm, inner diameter 1000mm, width 90mm, cooling inner surface width 60mm
A drum made of hot die steel SKD61 is used, and a cooling roll with an outer diameter of 200 mm is used as a cooling roll inscribed in the drum.
A roll of hot die steel SKD61 with a width of 58 mm is used, and the contact position of the cooling drum and cooling roll is 240°,
Press with a pressure of 50 kg and rotate at a circumferential speed of 25 cm/sec. Set the infrared temperature sensor to 150℃,
Set the take-up motor control switching or take-up drum lowering cylinder operation timing adjustment timer to 0.07 seconds. A heat-resistant synthetic rubber coated roll with a diameter of 100 mm and a width of 60 mm is used as the pinch roll, and is pressed with a pressure of 5 kg and rotated at a circumferential speed of 25 m/sec. The control roll has a diameter of 40mm, a width of 60mm, and a weight of 60mm.
It is a roll made of a 400gr aluminum cylinder with internal bearings, attached with an aluminum support arm of 150mm in length and 200gr in weight, and further equipped with an air spring control circuit for the damper, which is inscribed in the inner peripheral surface of the cooling drum to allow it to idle. I'll keep it.

The winding drum is an air suction roll with a diameter of 250 mm and a width of 65 mm, a collar of 260 mm in diameter and a thickness of 3 mm on the outside, and a large number of air circulation holes of 3 mm in diameter on the surface of the magnetic roll.The winding motor is 3 horsepower. A 1750-rpm DC motor is used, which is doubled in speed by a synchronized pulley belt, and before the molten metal is ejected, the drum peripheral speed is controlled at 0.1% faster than the inner peripheral surface, and a constant torque is set in advance by a timer signal. A control method was used that allowed the transition to control.

Made of silicon nitride, the nozzle has an outer diameter of 65 mm and an inner diameter of 50 mm.The nozzle has a slit-shaped opening with a slit width of 0.35 mm, a length of 50 mm, and a depth of 10 mm at the bottom.Si8.9%, Al7.05
After melting 500g of sendust and alloy containing 1.2%, 1.2% Mo, and 1.0% Ni, the bottom of the acute-angled nozzle was inserted into the internal contact point of the cooling drum and cooling roll, which were being driven at a circumferential speed of 25 m/s. The molten metal, which is 50°C higher than its melting point, is pressurized with 1 atm of argon gas and ejected continuously. The thus ejected metal was cooled by the screen between a cooling drum and a cooling roll, and was wound into a coil with a width of 50 mm, a thickness of 70 μm±3 μm, and a length of about 140 m, and wound onto a winding drum. The obtained ribbon was smooth within a range of ±3 μm on both ends,
It exhibits a tensile strength of 35Kg/ ^mm2 , and its magnetic properties include magnetic flux density B ₁₀ 8600G, maximum permeability μmax 155000,
It showed satisfactory characteristics of initial permeability μ0.01 70000 and coercive force Hc0.018Oe.

Example 2 Among the devices of the invention described in Example 1, the diameter
After removing the 200mm inscribed cooling roll and its spindle feed table, the same structure was left as it was, with the inner peripheral surface speed of the cooling drum being 40m/sec,
Set the timer connected to the infrared ribbon tip detection sensor to 0.05 seconds, press the pinch roll with a pressure of 10 kg, and rotate it at the same circumferential speed. The initial circumferential speed of the winding drum was similarly set to be 0.1% faster than the inner circumferential speed of the cooling drum, and a control system was adopted in which the control system shifted to constant torque control in response to a signal from a timer.

Fe ₆₃ −Co ₂₇ −Zr ₁₀ in the same nozzle as in Example 1
500g of alloy with the following components is melted, and the molten metal, which is about 50℃ higher than the melting temperature, is continuously spouted from the radial direction onto the inner peripheral surface of the cooling drum around 240 degrees clockwise by pressurizing it with 1.5 atmospheres of argon gas. The ejected metal is rapidly cooled from only one side by the inner circumferential surface, and is transported to the take-up drum while remaining stuck to the wall due to centrifugal force.
It became a coil with a length of approximately 1.2 m and was wound onto a winding drum.

The obtained ribbon was smooth on both surfaces within a range of ±3 μm, and could be bent without breaking even in a 180° bending test over the entire length of the ribbon. It was proven to be homogeneous and completely amorphous. The magnetic properties also show excellent values, with magnetic flux density B _s 17KG, coercive force Hc 0.08Oe, and squareness ratio Br/
Bs80%, maximum magnetic permeability μmax 162000, and crystallization temperature showed a high value of 520℃.

[Brief explanation of the drawing]

1A, B, and C are diagrams showing the principle of the apparatus of the present invention, where A shows a front view before winding, B shows a side view during winding, and C shows a sectional view. FIGS. 2A and 2B are a front view and a side view, respectively, of an embodiment of the apparatus of the present invention. O...Scraper, 1...Cooling drum, 2...
...Nozzle, 3... Winding drum, 4, 4', 4''...
Pulley, 5... Belt, 6... Infrared temperature sensor, 7... Pinch roll, 8... Control roll,
9... Quenching roll, 10, 18... Cooling drum radial direction feeding table, 12, 19... Cooling drum rotation axis direction feeding table, 11... Spindle for cooling roll, 13, 14, 15, 46, 34, 3
5... Synchro pulley, 16, 16'... Winding motor, spindle feeding table for winding drum, 17... Spindle for pin troll, 20...
... Rotating shaft, 21 ... Control roll arm, 22 ... Winding motor, 23, 24, 25, 29 ... Synchro pulley, 26, 27, 36, 37, 38 ... Synchro belt, 28 ... Winding drum spindle,
30... Air cylinder, 31... Winding drum feeding mechanism, 32... Pulley slide mechanism, 33...
... Rotating joint, 39, 40 ... Spindle housing for cooling drum, 41 ... Gear coupling spring, 4
2...Main motor, 43...Bed, 44, 45
...Takoji generator.

Claims (1)

[Scope of Claims] 1. A device for sequentially producing thin strips in the rotational direction of the inner circumferential surface of a rotating cooling drum by supplying a molten material through a nozzle to the inner circumferential surface of the rotating cooling drum and cooling and solidifying the material, comprising: A winding drum including a ribbon capturing means is disposed at a position on the rotational downstream side of the cooling drum, which is spaced from a molten material supply position in the cooling drum, and the molten material supply position and the winding drum arrangement position are connected to each other. In the cooling drum between, there are a pinch roll for pressurizing and sending out the thin ribbon generated along the inner circumferential surface of the cooling drum, a control roll for adjusting the tension of the generated conveying thin ribbon, and a control roll for adjusting the tension of the generated conveying thin ribbon, and a roller for passing the tip of the conveying thin ribbon. A manufacturing device for liquid quenched ribbon, characterized in that it is equipped with a timing detection sensor. 2. The above-mentioned ribbon capturing means provided on the winding drum uses magnetic attraction force, attraction force due to air flow, adhesive force due to adhesive, and a belt running at the same circumferential speed along the outer peripheral surface of the winding drum. 2. The device according to claim 1, wherein the device is configured to generate any one of mechanical gripping forces that pinch the continuous ribbon on the outer peripheral surface of the winding drum.