JPS5835047A - Producing device for thin metallic strip - Google Patents

Abstract

PURPOSE:To obtain a long-sized thin metallic sheet having various good electromagnetical and physical properties and thickness accuracy by measuring the temp. of a roll during production of the sheet and controlling the flow rate of water for cooling the roll in accordance with the measured value. CONSTITUTION:Molten metal 3 is ejected through a nozzle system 2 onto a rotating roll 1 to produce a thin metallic sheet 5 which is taken up on a coiling roll 6. During this time, the temp. of the position between a metallic mirror 12 and the roll 1 is measured with an IR temp. measuring instrument 11, and the signal thereof is converted by a control circuit 13, by which an oil hydraulic servocontrol 10 directly coupled to flow rate control valve 9 is driven. The input sensitivity adjustment and various gains of the circuit 13 are adequately set, whereby the surface of the roll 1 is controlled to prescribed temp.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for manufacturing thin metal sheets, and is particularly suitable for obtaining long thin metal sheets with good electromagnetic, chemical, and physical characteristics and thickness accuracy. This relates to manufacturing equipment.

/i-In equipment for manufacturing thin metal sheets by bringing metal into contact with the surface of a rotating roll and cooling and solidifying it, conventionally, rolls with good thermal conductivity such as copper alloy or steel are used as the roll material. I have been measuring the rapid cooling of molten metal from K.

In addition, when manufacturing long thin metal sheets from a large amount of molten metal using such equipment, the temperature of the rolls increases and the rate at which the molten metal is cooled varies, resulting in Electromagnetic properties of thin metal sheets.

It is known that the physical properties or the thickness of the metal sheet vary depending on the location of the metal sheet, but as a countermeasure to this problem, a method has been adopted in which the inside or outside of the roll is cooled with a high-speed fluid. However, with this constant rate forced water cooling,
- Although it is possible to suppress the rise in roll temperature and bring the roll to a thermally balanced state by supplying sufficient cooling water, the following drawbacks cannot be overcome. In other words, it may not be possible to easily adjust the roll temperature if the cooling water temperature changes depending on the season or temperature, if the cooling water is linked, or if the operating conditions for manufacturing thin metal sheets change. It is. In addition, when the roll is water-cooled from the inside, changes in the roll wall thickness also affect the roll temperature. For example, if the cooling roll surface is modified and the roll thickness changes, accumulation may occur. It is necessary to adjust the amount of cooling water based on the data obtained or heat balance calculation.

It is an object of the present invention to improve the drawbacks of the prior art described above and to provide an apparatus capable of stably and consistently producing sound metal thin plates with uniform properties and shapes.

The present invention is characterized by measuring the temperature of the roll during the production of metal thin sheets and adjusting the amount of water to cool the roll based on the measured value. This means that a means for controlling this is also provided. Therefore, a system for measuring the roll temperature, an electric circuit for converting the signal to adjust the amount of cooling water based on the measured value, and a system for adjusting the amount of cooling water are provided.

In the present FIiii, it is also possible to use a method of embedding a thermocouple in the roll and obtaining a signal from a rotating terminal as a means of measuring the roll temperature, but this method causes severe wear and tear on the rotating terminal. There are disadvantages such as incomplete contact due to wear and dust, which often causes malfunctions, and it is very difficult to create a roll having this function, and the rolls are expensive. Therefore, it is preferable to use an infrared temperature measuring device or the like that can measure the temperature without contacting the object to be measured.

When manufacturing a thin metal sheet using the method described above, it is necessary to polish the roll surface to a near-mirror surface in order to improve the surface shape of the obtained thin metal sheet. In such cases, the infrared radiation coefficient (=2) is very small, for example, mirror finished steel alloy = ~ α08, iron alloy Σ = ~ α15
Although it is not easy to accurately measure temperature, we were able to make it possible by using a measurement method and a special electric circuit that converts the measured value into a control signal.

The measurement method is to measure the radiation between the tip of the roll wrapping the detector and the surface of the roll, or to place a gold 14 mirror close to the roll, in order to detect the reflection of the external heat source. Electric circuits are equipped with circuits to separate weak signals from noise.

To adjust the amount of cooling water, a special flow control valve with a hydraulic servo body 11JK was used to ensure quick response.
Depending on the situation, a motor-driven flow control valve or a system that adjusts the output of a cooling water bonder may also be possible.

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

FIG. 1 is a schematic diagram of a thin metal plate manufacturing apparatus including a cooling water amount adjustment system, in which 1 is a roll for cooling bath water, 2 is a roll for holding molten metal 3,
It is a nozzle system that ejects water. Reference numeral 4 denotes a water channel for roll cooling water, and an appropriate amount of water is passed therethrough prior to manufacturing a thin metal sheet.

When producing a thin metal plate, molten metal is jetted onto rotating rolls to produce a thin metal plate 5, which is then wound up by a winding roll 6. During this time, the temperature at a position between the metal mirror 12 and the roll is measured by the infrared temperature measuring device 11, and the signal is converted by the control circuit 15 to drive the hydraulic servo 10 directly connected to the flow control valve 9. 14 is a hydraulic pump. By appropriately setting the input sensitivity adjustment and various gains of the control circuit 13, it is possible to bring the roll surface to a predetermined temperature.

Approximately 7 Kf of 81% Fe prepared according to the above-mentioned example.

B1a%, 8ia%, 02% (I!) Alloy f) Longitudinal direction f) Changes in magnetic properties are shown in Figure 2. Changes in longitudinal direction such as crystallization temperature are shown in jIs diagram. The roll surface temperature to be reached was set at 220°C, but it reached 200°C in about 5 seconds after the start of metal sheet production, and thereafter the surface temperature was able to be maintained at 220°C ± 10°C. Changes in magnetic properties and crystallization behavior at 5o@t from the ribbon tip shown in FIGS. 2 and 5 are as follows when the roll temperature reaches the set temperature @R-
Since the roll surface temperature could be controlled to be almost constant in the subsequent parts, a fairly homogeneous material was obtained.

Therefore, it is possible to produce homogeneous materials.

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of a metal thin plate manufacturing apparatus containing a cooling water 1tII node system, Figure 2 is a longitudinal magnetic property change diagram of the alloy prepared in the example, and Figure 3 is a diagram of longitudinal changes in the crystallization temperature, etc. It is a figure showing a change. 1: Melt 1 cold! Roll, 2: Nozzle, 37 Molten metal, 4:
Cooling water channel, 5: Metal thin plate, 6: Take-up roll, 7: Cooling water, 8: Cooling water pump, 9: Flow rate control valve, % 10
:Hydraulic Surgo %l]j Infrared I/s Temperature Measuring Instrument 12: Metal Mirror, 13I Control Circuit, 14: Engraving of Hydraulic Temperature Drawing (no change in content) 1 O 1 Bile':)'2 Figure f? IBBON LεNOTM (m) O 3 Diagram procedure correction writing method') 57.4.28 1988 Patent application No. 13237'/Name of investigation Name of gold ki4 thin strip manufacturing equipment repair market h ・III'l! ]Seki Samurai 1 person 1 person (Address: Higashi 4ij, 111-ku Marunouchi 2-1-2 and 1 Haku, Chiyo, Miyako)
・50g・ ]-1・”f, Norio Furukono on behalf of Kinzoku Co., Ltd.

Claims (1)

[Claims] 1. Spouting molten metal from a nozzle of a molten metal supply means,
In an apparatus that produces gold 114'N plate by cooling and solidifying it by contacting it with a rotating roll, the temperature of the part of the roll that comes into contact with the molten metal is detected, and based on that value,
- A thin metal plate manufacturing apparatus characterized in that the amount of water used to cool the tube is reduced to one section. 2. A gold 14 thin plate manufacturing apparatus according to claim 1, characterized in that an infrared temperature measuring device is used as means for detecting the temperature of the roll. 3. A thin metal sheet manufacturing apparatus according to claim 1, wherein the thin metal sheet manufactured includes an amorphous phase.