JPS5823543A - Controlling method for thickness in production of thin strip of quickly solidified metal by double roll method - Google Patents

Abstract

PURPOSE:To produce a quickly cooled thin strip with extremely uniform thickness by measuring and storing the rates of eccentricity of rolls according to their rotating angles and controlling the gap between the rolls in accordance with the signal operated by taking into consideration the phase delay of a roll gap control system. CONSTITUTION:The molten metal 2 in a crucible 1 is ejected from a nozzle 7 between cooling rolls 8, 8' under constant gaseous pressure from a bomb 9, whereby said steel is quickly cooled to solidify to a thin strip 12. Here, a roll chock 13 which supports the roll 8' can slide on right and left in housing 14. The position of the roll is precisely controlled via the piston 15 of a cylinder 16 with an oil hydraulic braking device 17. Cylinder position detectors 18, 19 with high accuracy are used. The signals of detectors 20, 20' for rotating angles at the shaft ends of the rolls 8, 8' and measuring devices 21, 21' for the eccentricity of the rolls are inputted to a roll eccentricity controller 22 and are stored therein. The signals of the controller 22 enters the device 17, by which the position of the piston 15 is controlled precisely in follow up to the rotating angles of the rolls.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method for controlling the thickness of a lip-shaped thin metal strip (hereinafter simply referred to as a thin strip); It is something.

For example, in general, a crucible or the like is placed on the surface of a cooling roll (usually a metal roll) for rapid cooling, which is rotated at high speed, and the molten metal is pushed out using gas pressure or the like, and the molten metal is continuously pressed out. It is known as a material that is supplied directly and solidified by ultra-rapid cooling. Both the single-roll method using only one Kli cooling roll and the twin-roll method using two cooling rolls are known. Of these, the present invention relates to the twin-roll method. In order to manufacture a substantial thin strip plate with uniform thickness using the conventional twin roll method (1)
Controls the nozzle jet pressure to a constant level.

(2) Control the roll rotation speed to a constant value.

(3) Control the gap between the rolls to be constant.

There are 53 methods being carried out simultaneously.

However, the present inventors discovered that despite strict control of these factors, 0 sheet thickness fluctuations still occur. I discovered that it is something. That is, for example, in the production of amorphous metals, the gap between two cooling rolls is usually 0.001 to 1. It is held within an extremely narrow range of Og@g. On the other hand, ■ - Lu O eccentricity is usually 20 to 50 μA〉
However, even if high-precision processing methods are used, it is extremely difficult to keep the thickness below 10μ.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a method for easily and stably producing a large number of strips having a uniform thickness.

That is, according to the present invention, when producing a thin strip plate by spouting molten metal between two rotating rolls from a nozzle, the eccentricity of each cooling roll is measured according to its rotation angle, and it is memorized. In addition, the adjustment amount of the roll gap is calculated in consideration of each phase delay of the control system, and the calculated control signal is used to always control the gap between the two cooling rolls to a constant value, thereby making the plate thickness uniform. 2. A method for controlling plate thickness in the production of a rapidly solidified metal thin ribbon plate by a twin roll method, 2. The double roll method according to claim 1, wherein the metal thin ribbon plate is a crystalline metal thin ribbon plate. A method for controlling plate thickness in the production of rapidly cooled metal thin strip by a roll method, 3. By the twin roll method according to claim 1, characterized in that the metal thin ribbon is an amorphous metal thin ribbon. This is a method for controlling plate thickness in the production of quenched thin metal strips.

The present invention measures the eccentricity of each roll according to its rotation angle, stores it, calculates it by taking into account the phase delay of the roll gap control system, and uses the calculated control signal to measure the eccentricity of the two cooling rolls. It is possible to control the gap to a constant value and thereby manufacture the quenched strip with an extremely uniform thickness. When producing a thin strip plate spouted between rotating rolls, each row is Detect eccentricity and store it in a device that stores the amount of eccentricity of each roll,
In addition, the rotation angle of the roll is detected by a means for detecting the rotation angle of each roll, and the calculation is performed by a calculation device that sets the position of one roll according to the rotation angle of each roll, and the calculation signal is used to calculate the rotation angle of the roll. The position of one of the rolls is controlled to a preset control position to make the plate thickness uniform.

The conventional method will be described below, followed by a detailed explanation of embodiments of the tube of the present invention.

No.flit! This is an example of conventional manufacturing equipment.
1 is a rut made of refractory material, inside which metal raw material 2 with the ingredients as KIl is put, and 4I is placed on the outside of the rut 11.
The high-frequency induction coil is melted. This bolt is connected to the screw 5 via a device expander 4 which includes a coil and a coil. Each screw 6 is rotated by a motor 6, which allows the gap between the nozzle 7 and the quenching wheels 8, 8' to be adjusted or to widen the gap during maintenance. This is a gas pump for applying pressure to the 9-hole tank.

In manufacturing the quenched strip, first melt the multi-metallic material 2 in the lull 3, and then turn on the motor 6 when ready. 1
By rotating the nozzle 7 and the quenching roll s, s'ol
Maintain the Slff gap at a constant value. When the electromagnetic valve 11 is opened, a constant gas pressure is applied to the metal through the gas pressure reducing valve 10, and when the molten metal is being produced from the nozzle 7, for example, 10~ 50 q/s I! It is ejected between the quenching journals 8 and 8' rotating at a circumferential speed of 100°C, rapidly solidified, and becomes the thin ribbon plate 12. In this case, as the temperature of the quenching tube gradually rises, the gap between the two n-rules 8#8' changes, so normally, the cage 13 is rotated according to a predetermined sequence, and the star is cooled. The roll 8' is moved through the roller 14 to adjust the relationship, but the roll expansion O change line with the water-cooled roll does not reach an equilibrium state in a few seconds. Quick cooling bag 8
．． 8' held in republican stop position.

However, the plate thickness deviation mK of the thin strip plate produced in this manner is large, and both rolls 8 and 8I are eccentric, resulting in a complicated plate thickness variation accompanied by a kind of undulation phenomenon. The present situation is that it is extremely difficult to obtain a thin strip plate having a uniform thickness due to the variation in thickness. 1 to 12 are the same as the enlarged figure 1, so the explanation will be omitted. 13 is a roll chuck supporting the quenching roll 8', which is -P%
It is now possible to slide left and right inside Ujinda 14. 15 is a piston of the cylinder 16, and the roll position is precisely controlled by the hydraulic control device 17! control e 18
．． A highly accurate detector such as Magnescale is used (with a detector at one position of the 19Fi cylinder).A rotation angle detector 20920 is installed at the shaft end of the quenching roll 8.8'.
' is provided, and this signal and roll eccentricity side regulator 21.21
' signal is input to the roll eccentricity control device 22 and stored. Although sufficient accuracy can be obtained by simply performing this input before the start of production of the quenched thin strip, it is also possible to use the constant OII value for each horizontal rotation for controlling the eccentricity of the feeding rotation. In addition, K[
Contact roll gear.

By controlling the p-order OWA rotation, it is possible to reliably compensate for the so-called eel phenomenon.・The signal line from the roll eccentricity control device 22, for example, the oil pressure The position of the piston 15 is precisely controlled by following the rotation angle of the roll.

In addition, in this example device, the eraK thin strip plate is manufactured by using the 6-piece method, which uses hydraulic pressure for the horizontal position control, because the method using the expansion motor cannot follow it in terms of responsiveness. The variation in plate thickness caused by roll eccentricity could be directly reduced by about 1/4 to 1/8 compared to that obtained by the conventional method described above. Also, Fig. 2 shows a method of moving only one roll, and although it is possible to move both rolls independently, it is possible to move both rolls independently. It is clear that the same effect can be obtained.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an embodiment of manufacturing a rapidly solidified metal thin ribbon plate using the two-wheel method, and Fig. 2A is a diagram showing an embodiment of the present invention. 1...Ruth 2...Metal materials 3...
High-frequency haze conduction coil 4...Gripper 5...Screw 6 axis/cage 7...Nozzle 8
．． 8'-・Cooling roll 9...Gas pump 10
-・Reducing valve 11-・Solenoid valve 12-・Thin strip plate 13・Roll chock 14・Housing 1
5- Piston 16 Cylinder 17...
・Hydraulic control device 18.19...Cylinder position detector 20, 20'-...Rotation angle detector 21.21'...Roll eccentricity side regulator 22-...Roll eccentricity control device 1st II

Claims (1)

[Claims] 1. When producing a thin strip by spouting molten metal between two rotating rolls through a nozzle, the core amount of each cooling roll is measured according to its rotation angle, and the At the same time, the adjustment amount of the roll gap is calculated taking into account each phase delay of the control system, and the gap between the two cooling rolls is always controlled to be constant using the calculated control signal to make the plate thickness uniform. A method for controlling plate thickness in the production of rapidly solidified thin metal strips using the twin-roll method, which is characterized by a tube. 2. A sheet thickness control method in the production of rapidly solidified metal thin strips by the twin-roll method according to claim 1, wherein the metal thin strips are crystalline metal thin ribbons. 3. A sheet thickness control method in the production of a quenched metal thin strip by the twin-roll method according to claim 1, wherein the metal thin ribbon is an amorphous metal thin ribbon.