JPS6319264B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a thin plate manufacturing apparatus, and more particularly to a thin plate manufacturing apparatus suitable for processing defective materials generated at the initial stage of manufacturing a thin plate such as an amorphous alloy foil.

Thin sheets such as amorphous alloy foils are generally manufactured by a roll quenching method. This is a manufacturing method in which molten metal is poured from a nozzle onto the surface of a rotating drum, where it is cooled and solidified. However, in the transient state at the beginning of tapping, the flow rate of molten metal from the nozzle becomes unstable. Therefore, the thin plate may be intermittent, or even if it is continuous, the thickness may be uneven. If such a defective material is wound as is, the normal portion of the thin plate wound thereon will also be damaged, resulting in a disadvantage that the manufacturing yield will be reduced.

By the way, there is a method of cutting and removing defective material using a normal shear placed away from the rotating drum, but this method requires high equipment costs and large-scale equipment, and the thin plate is extremely thin at about 10 to 20 μm.
Since it is manufactured at a high speed of 20 to 30 m/sec, it is difficult to accurately guide the subsequent normal state in-line after cutting.

Therefore, the present applicant has already proposed in Japanese Patent Application No. 54-76800 (Japanese Unexamined Patent Publication No. 56-4348) that a thin plate at the initial stage of production is taken offline, and the thin plate is pulled out offline at a speed faster than the manufacturing speed of the thin plate. We have proposed a method and device in which the defective material is separated at the unsolidified part of the thin plate, and then the normal state is brought in-line.

However, after the start of production, the position where the thin plate that is in close contact with the rotating drum separates from the drum is determined by the thickness of the thin plate.
In addition to changing depending on the condition of the molten metal and the roll surface,
Since the thin plate after peeling is extremely thin (10 to 20μ), there is a problem that it cannot necessarily be accurately guided along a predetermined offline route due to air resistance, etc., and furthermore, the thin plate cannot be guided offline or inline. Since the guiding means injects gas onto the thin plate from different directions to switch the guidance of the thin plate, there is a problem in that it is extremely difficult to easily realize accurate guidance of the thin plate. . In other words, in the above-mentioned technique, since the position from which the thin plate is pulled out is on-line, it is difficult to reliably and easily separate the defective material.

An object of the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a thin plate manufacturing apparatus that can reliably and easily separate thin plates of defective material.

The present invention includes a nozzle for pouring out molten metal, a rotating drum for cooling and solidifying the molten metal poured from the nozzle to form a thin plate, and a rotary drum disposed close to the surface of the rotating drum. A winding device for winding a thin plate formed of
A roll is provided to guide the thin plate formed on the surface of the rotating drum at the initial stage of production, from the middle of the inline to offline or from offline to inline, and the peripheral speed of this roll can be controlled to at least a speed higher than the manufacturing speed of the thin plate. A driving device is provided, and a plurality of magnet devices capable of ON/OFF control for freely operating the thin plate toward and away from the outer periphery of the roll are installed on the outer periphery of the roll, and the roll is connected to the rotating drum. By arranging the parts close to each other and separating a part of the thin plate brought offline in close proximity to the roll from the outer periphery of the roll, it is possible to reliably and easily remove defective material from the unsolidified part of the thin plate. It is designed so that it can be separated into two parts.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory diagram showing an embodiment of a thin plate manufacturing apparatus according to the present invention. The upper opening of the furnace 11 into which metal is introduced is covered with a cover 12, and the outer periphery is wound with a heater coil 13 to accommodate molten metal 14. A spout pipe 15 is arranged in the center of the furnace 11 and extends from the bottom side to above the cover 12, and at the upper end of the spout pipe 15, the diameter gradually decreases toward the opening side. A spouting nozzle 16 is disposed, and the spouting nozzle 16 is fixed to the cover 12 by a presser foot 17 in communication with the spouting pipe 15. A lower outer circumferential surface of a drum 20 fixed to a shaft 19 rotated by a drive motor 18 is disposed above the pouring nozzle 16 to face the drum 20 .

That is, the metal put into the furnace 11 is turned into molten metal 14 by energizing the heater coil 13, and by the action of the furnace internal pressure 21 as the pouring force,
It is pushed into the spouting pipe 15 and the spouting nozzle 16
from the drum 20 onto the surface of the drum 20.
It is cooled and solidified on the surface of the thin plate 22.

Next, how to control the furnace pressure 21, the circumferential speed of the drum 20, the temperature of the molten metal 14, and the gap between the pouring nozzle 16 and the drum 20 as factors related to the thickness accuracy of the thin plate 22 manufactured in this way. I will explain about it.

The furnace internal pressure 21 is controlled by the drum 2 so as to be able to contact the thin plate 22.
a thickness detection sensor 24 that detects the thickness of the thin plate 22 based on the amount of movement of a contact roller 23 disposed opposite to the inner surface of the furnace; Immediate control is performed based on the control amount of the pressure control panel 27 to which each output value of the pressure setting device 26 for setting an appropriate value is transmitted. That is, based on the control amount of the pressure control panel 27, the hydraulic cylinder 31 is operated via the servo valve 30 by the hydraulic source consisting of the hydraulic pump 28 and the tank 29. The operation of the hydraulic cylinder 31 changes the volume of the cylinder chamber 34A of the pneumatic cylinder 34 disposed on the pedestal 33 via the piston rod 32. Since the pressure cylinder 34 communicates with the upper space of the furnace 11, changes in the cylinder chamber 34A immediately control the furnace internal pressure 21. In addition, the piston rod 32 and frame 3
A rubber spring 36 is connected between the piston rod 3 and the piston rod 3.
The control system is provided in the second direction of movement, improving the responsiveness of this control system.

The control commands for the pressure cylinder position detection sensor 37 and the furnace pressure detection sensor 25 connected to the piston rod 32 are transmitted to the valve 40 to which the pressure pump 38 and the vacuum pump 39 are connected, so that the molten metal 14 is In response to an increase in the pouring head and a decrease in the furnace pressure 21 due to pouring from the pouring nozzle 16, the space of the furnace 11 is replenished with pressure fluid,
The furnace internal pressure 21 can be controlled. Note that a throttle 41 is provided in the piping system of the valve 40 to reduce the degree of influence of the valve 40 on the operation of the pneumatic cylinder 34.

The peripheral speed of the drum 20 is determined by transmitting each output value of the thickness detection sensor 24, speed detection sensor 42, and speed setting device 43 to the speed control board 44, and controlling the rotation speed of the drive motor 18 based on the control command from the speed control board 44. controlled by adjusting.

The temperature of the molten metal 14 in the furnace 11 is determined by transmitting the output values of a temperature detection sensor 45 and a temperature setting device 46 to a temperature control panel 47, and controlling a coil power supply section 48 according to control commands from the temperature control panel 47. , heater coil 1
It is controlled by adjusting the current value applied to 3. In the temperature control of the molten metal 14 as well, the output value of the thickness detection sensor 24 is transmitted to the temperature control panel 47, and the temperature control on the thickness of the thin plate 22 is directly performed based on the detected thickness of the thin plate 22. You may also do so.

The gap between the pouring nozzle 16 and the drum 20 is determined by transmitting each output value of the gap detection sensor 49 and the gap setting device 50 to the gap control panel 51, and controlling the hydraulic cylinder 5 according to the control command from the gap control panel 51.
2 and moves the base 53 supporting the furnace 11 up and down. In addition, in controlling the gap between the pouring nozzle 16 and the drum 20, the output value of the thickness detection sensor 24 is transmitted to the gap control panel 51, and the gap value is determined based on the detected thickness of the thin plate 22. The effect on thickness may also be directly controlled.

Further, a temperature detection sensor 54 is disposed at an arbitrary position facing the outer peripheral surface of the drum 20, and based on the detected value of the temperature detection sensor 54, cooling air or the like is blown from the outside of the drum 20 by a blower fan (not shown). The temperature of the drum 20 is controlled. By controlling the temperature of the drum 20, the material properties of the thin plate 22 can be adjusted.

In this way, a thin plate 22 with adjusted thickness accuracy and material properties is manufactured on the drum surface.
As already mentioned, defective materials occur in the early stages of tapping. The means for disposing of this defective material will be explained below.

Reference numeral 60 denotes a roll that is arranged close to the drum 20 and guides the thin plate from in-line to offline. The rotational speed of the roll 60 is determined by the motor 6
4. It can be controlled by a speed detector 65, a speed control panel 66, and a speed setter 70. roll 6
A plurality of magnets that can be independently controlled on and off are built into the outer periphery of the 0. The circumferential speed of the roll 60 is synchronized with the circumferential speed of the drum 20 in advance,
When manufacturing a thin plate is started with the magnet 61 turned on, the thin plate is wound around a roll 60, peeled off by an air knife 62, and stored in a scrap box 63. In this case, the air knife 62
By turning off the nearby magnet, the thin plate can be reliably separated from the roll 60.

The flow of molten metal 14 ejected from nozzle 16 stabilizes in about 0.1 seconds. If the roll 60 is accelerated at this point, the defective parts of the thin plate at the beginning of production will be separated by the unsolidified parts of the thin plate with weak strength.
The separated sheets are disposed of in a scrap box.

By turning off all the magnets 61 before the following normal portion of the thin plate approaches the roll 60, the normal material is guided along the surface of the drum 20 without being wound around the roll 60. 67,71
1 and 2 are guides each having injection ports 68 and 72 for injecting gas toward the surface of the drum 20, and 69 is a presser roll for closely guiding the thin plate on the drum surface, that is, in-line.

After the defective material has been separated, the normal material is guided along the surface of the rotating drum and wound into a coil by a winding means described below. That is, the bracket 80 has an L-shaped swing arm 8.
1 is swingably supported, and a winding drum 83 is fixed to a rotating shaft 82 that is rotatably supported at one end of a swing arm 81. The winding drum 83 is arranged to face the outer peripheral surface of the drum 20,
The thin plate 22 is rotated by a winding motor 84 and can be wound up under the action of vacuum suction force or electromagnetic suction force.

One end of the swinging arm 81 is connected to the tip of a piston rod of a pressing cylinder 86 supported by a trunnion on a bracket 85. This pressing cylinder 86 pushes the winding drum 83 onto the drum 20.
At the same time, push the thin plate 2 onto the winding drum 83.
2 is wound up, and as the winding diameter increases,
The piston rod is moved backward, and the swinging arm 81 is held swingably in a direction in which the winding drum 83 is separated from the drum 20.

The winding motor 84 includes an acceleration/deceleration compensator 87 that adjusts the rotation speed of the winding drum 83 according to acceleration/deceleration of the drum 20, a torque setting device 88, and a winding motor 8.
The torque is controlled to an appropriate value by the control command of the torque control panel 90 to which each detection value of the current detection sensor 89 that detects the current value of 4 is transmitted, and the tension acting on the thin plate 22 during winding is kept constant. It is said that

According to this embodiment, the following effects are achieved.

(1) Control of the roll 60 becomes easy because defective materials can be separated from normal materials simply by accelerating the circumferential speed of the roll 60. In this case, depending on the length of the defective material, the timing of acceleration, etc., normal material may be included in the separated thin plate, but the point is that the defective material does not need to be conveyed to the winding device; It does not matter if normal material is included in the thin plate.

(2) Since thin sheets at the initial stage of production are reliably guided to the roll 60 along the drum surface, that is, in-line, the reliability of processing defective materials is extremely high.

(3) Since the defective material is separated from the unsolidified part of the thin plate on the drum surface near the nozzle, which is the weakest in terms of strength, the magnet can be kept in the ON state until the following normal material approaches the roll 60, so the defective material can be reliably removed. can be disposed of.

(4) Since only normal material can be wound, damage to normal material by defective material can be prevented and product yield can be improved.

As described above, according to the present invention, a thin plate at the initial stage of production is guided offline from the middle of the inline,
Since the thin plates in this inline are pulled out at a speed faster than the manufacturing speed of the thin plates, defective materials can be reliably and easily separated from normal materials using simple means, which is an excellent method that can improve product yield. effective.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing a thin plate manufacturing apparatus according to an embodiment of the present invention, with a part thereof shown as a cross section. 14... Molten metal, 16... Elution nozzle, 20
... Drum, 22 ... Thin plate, 60 ... Inline/offline switching and defective material separation roll, 83 ... Winding drum, 61 ... Magnet, 67, 71 ... Guide.

Claims (1)

[Claims] 1 A nozzle that pours out molten metal, a rotating drum that cools and solidifies the molten metal poured out from the nozzle to form a thin plate, and a rotating drum that is placed close to the surface of the rotating drum and that is placed on the rotating drum. A winding device for winding up the formed thin plate, wherein a roll is provided to guide the thin plate formed on the surface of the rotating drum at the beginning of production by switching it to offline from the middle of inline or from offline to inline, A driving device capable of controlling the circumferential speed of this roll to at least a speed higher than the production speed of the thin plate is provided, and a plurality of magnet devices capable of ON-OFF control are provided to freely control the thin plate to and from the outer periphery of the roll. installed on the outer periphery of the roll,
Moreover, the roll is disposed close to the rotating drum, and the thin plate further includes means for separating a part of the thin plate guided off-line in close proximity to the roll from an outer peripheral portion of the roll. Manufacturing equipment.