JPS63188457A - Method and device for manufacturing fine metallic wire - Google Patents

Abstract

PURPOSE:To improve the quality of a product by forming a coolant layer by providing the drum horizontally rotating and controlling the rotary speed of the drum according to the position of a molten metal projecting nozzle so that the peripheral speed of the drum inner peripheral face becomes constant. CONSTITUTION:The molten metal projecting device 26 moving in recirprocation in the axial line Y direction for the drum 10 horizontally rotating is arranged and the annular member 54 equipped with the surface shape conforming to that of the coolant layer 24 to be formed in inclination is arranged inside the drum 10 as well. The coolant layer 24 is formed by rotating the drum 10 by a motor 64 and moved in the rotary shaft direction of the drum 10 by a servomotor 40 with jetting a molten metal jet 36. In this case the rotation control of the drum 10 is performed so as to hold the peripheral speed of the side face of the member 54 constantly by a controller 52 by driving a servomotor 44 as well. The solidifying winding speed of the fine metallic wire is thus uniformized and its quality is improved.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a method and apparatus for producing fine metal wire, particularly to an improvement in the rotating submerged spinning method. The present invention relates to a manufacturing method and apparatus.

[Prior art] Methods for obtaining thin metal wires directly from molten metal include casting, blooming,
It has attracted particular attention in recent years from the viewpoint of energy saving by omitting intermediate processes such as rolling, and the development of metal materials with new properties obtained by rapid solidification. The excellent properties obtained by rapid solidification include ultra-fine crystal grains, non-segregation, homogenization, expansion of the solid solubility limit, and amorphization, such as strength, corrosion resistance, electrical, and magnetic properties.For example, amorphous Gold E thin wires, or amorphous fibers, exhibit high strength and toughness that cannot be obtained with conventional crystalline metals, so they are being considered for application as high-strength materials, and they also have unique magnetic properties. Because there is, I
Application as an IR material is considered.

The methods of obtaining thin metal wires directly from molten metal that have been announced can be roughly divided into the following four methods.

1) Extrusion method 2) Rotating liquid spinning method 3) PDME method 4) Tuylor method The extrusion method of 1) injects a melt molten in an inert gas into a fluid with a viscosity comparable to that of molten metal. This method aims to stabilize the jet flow and form fibers.

The spinning method in rotating liquid (2) is a method in which a cooling liquid layer is formed in a rotating drum by centrifugal force, and molten metal is injected into this cooling liquid to form #R fibers.

3) PDME method is Pendant Drop M
This is an abbreviation for the eftExtration method, in which pendant-shaped metal droplets are attached to the side of a disk rotating at high speed, and then pulled out and solidified.

The Taylor method (4) is a method in which metal placed in a glass tube is heated and melted, the glass tube softened by heating is pulled out together with the melt inside, and a drum is wound up.

The present invention relates to the improvement of the 2) rotating submerged spinning method among the above four methods. In Figure 0, which is a side sectional view, the drum 10 has a hollow cylindrical part 12.
and a circular opening 14 in the center attached to its negative side.
A coolant outflow prevention plate 16 with
The drum 10 rotates at high speed. Drum 1 rotating at high speed
A cooling liquid is supplied to the inner periphery of the cooling liquid, and the cooling liquid forms a cooling liquid layer 24 by centrifugal force. Molten metal injection device 26
consists of a vertical molten metal heating furnace 28 , a molten metal injection nozzle 30 attached downward to the lower end of the molten metal heating furnace 28 , and a molten metal pressurizing pipe 32 attached to the upper part of the molten metal heating furnace 28 . The drum 1 is inserted through the opening 14.
It can move in the direction of the zero axis.

To obtain thin metal wire using this rotating liquid spinning device,
The drum 10 is rotated to supply a cooling liquid to form a rotating cooling liquid layer 24 on the inner periphery of the drum 10. Next, the master alloy inserted into the molten metal heating furnace 28 is melted to form a molten alloy 34,
The molten metal injection device 26 is inserted through the opening 14 of the drum 10, and the molten metal injection nozzle 30 is positioned above the inlet end 25a of the cooling liquid tank 25. First, an inert gas is sent into the molten metal pressurizing pipe 32 to melt the metal. The alloy 34 is injected from the molten metal injection nozzle 3 () at the same time as the molten metal injection device 2
6 is the end 2 from the inlet end 25a of the rotating cooling liquid $125
Move slowly towards 5b. The injected molten alloy jet stream 36 is injected into the cooling liquid layer 24 and rapidly cooled to become a thin metal wire 38 . By this method, fine wires 38 are continuously formed and accumulated in the rotating cooling liquid bath 25 within the drum 10.

In this conventional rotating liquid spinning method, the continuously produced metal wire [38 is not recovered from the drum 10, but is rapidly transferred to the cooling liquid tank 25 of the drum 10.
When the drum 10 is stopped and the thin metal wire 38 is taken out, the gold X#a 38 stuck to the inside of the drum due to centrifugal force loses the centrifugal force and falls into a ball shape, so the tangled thin metal wire 38 is loosened. The drawback was that it was very difficult to recover the waste. Furthermore, in a vertical device in which the drum is rotated vertically, there is a restriction that the diameter of the drum cannot be made very large due to the influence of gravity when a cooling liquid layer is formed on the inner peripheral surface of the drum by centrifugal force.

Therefore, when the rotation of the drum is stopped, the yellow metal thin wire on the inner circumferential surface of the drum is prevented from losing centrifugal force and falling.
In addition, in order to increase the diameter of the drum and increase the capacity of the thin metal wire, it is necessary to rotate the drum horizontally. When the drum is rotated horizontally, the surface of the cooling liquid layer is inclined due to the influence of gravity, so it is necessary to keep the depth of the cooling liquid layer constant, so the inner peripheral surface of the drum is sloped to match the surface shape of the cooling liquid layer. let In this way, when casting gold BLm wire by horizontally rotating the drum, the rotation radius of the inner peripheral surface of the drum varies depending on the position of the molten metal injection nozzle, and depending on the position of the molten metal injection nozzle, the rotation speed of the drum remains constant. In this case, there is a problem that the winding speed of the cast thin metal wire varies. When the winding speed of the thin metal wire changes, there is a slight change in the tension applied to the molten metal jet in the middle of solidification in the cooling liquid layer, and there is a drawback that a thin metal wire of constant quality cannot be obtained. Problems to be Solved] The present invention has been made to solve the above-mentioned problems when the inner circumferential surface of the drum is tilted in a horizontally rotating type rotating liquid spinning method. It is an object of the present invention to provide a method for manufacturing a thin metal wire and an apparatus therefor, which can obtain a thin metal wire of excellent quality while maintaining a constant value.

[Means for Solving the Problems] The method for manufacturing thin metal wire of the present invention includes forming a cooling liquid outflow prevention plate on the side surface of a cylindrical drum, horizontally rotating the drum, and cooling the inner peripheral surface of the drum by centrifugal force. The injection nozzle of the molten metal injection device forms a liquid layer, inclines the inner circumferential surface of the drum in accordance with the surface shape of the cooling liquid layer that is inclined due to the action of gravity, and injects a molten metal jet into the cooling liquid layer. When manufacturing a fine metal wire by reciprocating the drum in the direction of its rotational axis, the radius of the inner circumferential surface of the drum at the injection position of the molten metal injection nozzle is adjusted so that the circumferential speed of the inner circumferential surface of the drum is constant. The gist is to control the rotational speed of the drum accordingly.

Further, the metal AT wire manufacturing apparatus of the present invention includes a cylindrical drum having a cooling liquid outflow prevention plate formed on the side surface, and the drum is horizontally rotated to form a cooling liquid layer on the inner peripheral surface of the drum by centrifugal force. a drum whose inner peripheral surface is inclined in accordance with the surface shape of the cooling liquid layer which is inclined by the action of gravity;
an injection nozzle of a molten metal injection device that reciprocates in the direction of the rotational axis of the drum in the drum and injects a molten metal jet onto the cooling liquid layer; a rotation device of the drum; and a circumferential speed of the drum inner peripheral surface. The present invention further comprises a control means for controlling the rotating device according to the radius of the inner peripheral surface of the drum at the injection position of the molten metal injection nozzle so that the injection position of the molten metal injection nozzle is constant. ' [Function] In the method for producing a thin metal wire of the present invention, when producing a thin metal wire, a molten metal injection nozzle that injects a molten metal jet into a cooling liquid layer is reciprocated in the drum in the direction of the rotational axis of the drum. The rotational speed of the drum is controlled so that the circumferential speed of the inner circumferential surface of the drum is constant according to the radius of the inner circumferential surface of the drum at the injection position of the molten metal injection nozzle. Since the Ic thin wire is always wound around the inner peripheral surface of the drum at a constant speed, a thin metal wire with constant quality such as cross-sectional shape and diameter can be obtained.

Furthermore, in the metal mwi manufacturing apparatus of the present invention, when the molten metal injection nozzle that injects molten metal reciprocates in the direction of the rotation axis of the drum, the rotation radius of the inner circumferential surface of the drum at the molten metal jet injection position of the molten metal nozzle Accordingly, the rotation speed of the drum rotation device is controlled by the control means, so that
The molten metal injected into the cooling liquid layer always solidifies at a constant rate, becomes a gold R thin wire, and is wound around the inner peripheral surface of the drum.

[Embodiment] A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view of an embodiment of the present invention. drum 10
is made of stainless steel (SUS304) and has a drum inner diameter of 60a.
m, the inner width was 20 cm, and the inner diameter of the cooling liquid outflow prevention plate 16 was 56a. The cross-sectional curve of the cooling liquid water layer formed by centrifugal force in a horizontally rotating drum is calculated using a linear equation based on the balance between gravity and centrifugal force, with the axis of rotation taken as the Y-axis and the radial direction taken as the Y-axis. be done.

Y=((gR/30)”/2g)X”+e...(1)
In the above formula, π: pi, R: drum rotation speed, C, constant determined by the inner drum volume, cooling water amount, etc., B
;It is the acceleration of gravity.

The rotational speed of the drum was set to 300 rpm, and the cooling water was filled to the extent that it slightly overflowed, so that the upper end of the cooling water surface and the inner diameter of the cooling liquid outflow prevention plate 16 matched, and the Y axis was the center of rotation and the X axis was the radial direction. , the cross-sectional shape of the cooling liquid water layer 24 is calculated using equation (1), with the origin as the point where the Y-axis intersects with the bottom of the drum, Y=((gR/30)"/2Fr)(X"- 56”)+
20...(2) Represented by:

Next, a mechanism in which the molten metal injection nozzle 30 reciprocates while maintaining a constant distance from the liquid surface based on the coolant surface cross-sectional curve determined by equation (2) will be described. In FIG. 1, an axial servo motor 40 is attached to a +1ltha direction slide 1fi ellipse 42 and drives a radial slide mechanism 44 in the axial direction.

The radial servo motor 46 is a radial slide machine t#4
4 and radially drives a molten metal injection device 26 consisting of a heating coil 48 and a molten metal injection nozzle 30. The axial servo motor 40 and the radial servo motor 46 are connected to a controller 52 for programmable numerical control.

Also, the depth from the water surface to the bottom of the cooling liquid layer 24 is 1.5, calculated from the cooling liquid surface cross-sectional curve obtained from equation (2).
cm, the removable annular member 54 is attached to the drum 1.
It was installed on the inner surface of 0. The surface shape of the annular member 54 is shown by equation (3) when installed on the inner surface of the drum 10, and this is the inner circumference of the drum that is inclined to match the surface shape of the cooling liquid layer that is inclined by the action of gravity. This becomes a surface 54a.

Y=((πR/30)2/2g>((X-15>'-2
3”l+20 (3) Next, control the rotation speed of the drum 10 and the molten metal nozzle 30.
The trajectory of movement will be explained. Rotating shaft 6 of drum 10
A gear 62 is fixed to 0, and the output of the drum rotation motor 64 is ?0. It meshes with a gear 68 attached to 1166. The drum rotation motor 64 is connected to a controller 52, and the controller 52 has a radius at each position of the drum inner peripheral surface 54a calculated by equation (3), that is,
In FIG. 1, the drum rotation speed is programmed to be controlled based on the horizontal distance from the drum inner circumference ml 4a to the Y axis.

The formula for calculating the locus of movement of the molten metal nozzle is as follows. In other words, when the rotational speed of the molten metal nozzle is changed as the drum axially moves so that the circumferential speed of the drum 10 is constant, the position of the molten metal nozzle in the y-axis direction and the water surface at that Y value are The relationship between the positions x is given by equation (4).

However, Yll is the drum rotation axis, E is the X axis, and the drum radial direction. The origin is the point where the Y axis and the horizontal line including the lower surface of the coolant outflow prevention plate intersect.

・・・・・・(4) However, g: acceleration of gravity, Ro: molten metal nozzle is y=0
Initial drum rotation speed at position 2r0: Inner diameter of the coolant outflow prevention plate.Here, if the distance in the radial direction between the tip of the molten metal nozzle 30 and the coolant surface 24 is set to Δx, the trajectory to which the molten metal nozzle should be moved is (5) Also, the rotational speed of the drum is given by the following equation with respect to the y position of the nozzle.

R=rt, x() (6) According to the above equation (6), the rotational speed R at the Y position is input to the controller 52, and the rotational speed of the drum is controlled.

The operation of this embodiment having the above configuration for controlling the rotational speed will be explained. Drano, rotating motor 6
4 to rotate the drum 10 and inject the cooling liquid to form the cooling liquid M24. The cross section of the cooling liquid layer 24 is as shown in equation (2).
A cooling liquid layer 24 of a certain depth is formed on the annular member 54. Next, the heating coil 48 melts the metal in the molten metal injection nozzle 30, and the axial servo motor 40 is rotated while injecting the molten metal jet 36. and slowly sa in the direction of the rotation axis of the drum 10. At this time, the radial servo motor 44 also rotates, and the distance between the tip of the molten metal nozzle 30 and the surface 24a of the cooling liquid layer 24 is always maintained at Δ" by operating the controller 52 based on equation (5). On the other hand, the controller 52 controls the rotation speed of the drum so that the circumferential speed of the side surface of the annular member 54 is constant based on the y value at each position on the inner peripheral surface of the drum calculated by equation (6).

Using the apparatus of this example, FetsSLmB+s was melted under the following conditions, and a thin metal wire was cast.

Drum rotation speed: 300 rpm Test injection pressure: 4.5 kgf/cm" Distance between nozzle and coolant surface: 0.3 cm Molten metal temperature;
1250℃ Nozzle diameter: 0.15a-φ From the above initial conditions, the drum rotation speed R is also 0.3
It is given by equation (5) so that am.

As a result, the lines were deposited smoothly on the bottom surface of the drum even when the rotational speed of the drum was reduced and stopped after casting.

It was possible to smoothly wind the wire from one end using a winder, and a gold YTM wire of about 1000 seconds was obtained.

[Effects of the Invention] As explained above, the method and apparatus for manufacturing thin metal wires of the present invention are applicable to the horizontal rotation type submerged spinning method, in which the cooling liquid layer is tilted diagonally by the action of gravity. When the inner peripheral surface is tilted, the peripheral speed of the drum is controlled to be constant according to the radius of the drum inner peripheral surface at each position of the drum, and the molten metal jet sprayed from the molten metal nozzle is cooled. Since it is always wound up at a constant speed while solidifying in a liquid layer, a fine metal wire of extremely high quality with a constant cross-sectional shape and diameter can be obtained. Further, since the thin metal wire is not subjected to slack or tension during winding, the thin metal wire can be smoothly collected from the drum without becoming tangled.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a front view of a conventional rotating liquid submerged spinning apparatus, and 3rM is a side sectional view of FIG. 2. 10... Drum, 16... Coolant outflow prevention plate, 24
...Cooling liquid layer, 24a...Cooling liquid surface, 26...
Molten total bending injection device, 30... Molten metal injection nozzle, 3
6... Molten metal jet, 38... Metal thin wire, 40
... Axial direction servo motor, 42 ... Axial direction slide a ellipse, 44 ... Radial direction servo motor, 46 ...
- Radial slide mechanism, 48... heating coil, 50
...Drum inner surface, 52...Controller, 54...
・Annular member, 64...Drum rotation motor Fig. 2 Fig. 3

Claims (2)

[Claims] (1) A cooling liquid outflow prevention plate is formed on the side surface of a cylindrical drum, the drum is horizontally rotated, a cooling liquid layer is formed on the inner peripheral surface of the drum by centrifugal force, and the cooling liquid layer is tilted due to the action of gravity. The inner peripheral surface of the drum is inclined according to the surface shape, and the injection nozzle of a molten metal injection device that injects a molten metal jet into the cooling liquid layer is reciprocated in the drum's rotational axis direction within the drum to produce fine metal wire. In this method, the rotational speed of the drum is controlled according to the radius of the inner circumferential surface of the drum at the injection position of the molten metal injection nozzle so that the circumferential speed of the inner circumferential surface of the drum is constant. Production method. (2) A cylindrical drum having a cooling liquid outflow prevention plate formed on the side surface, wherein when the drum is horizontally rotated and a cooling liquid layer is formed on the inner peripheral surface of the drum by centrifugal force, the drum is tilted due to the action of gravity. A drum whose inner peripheral surface is inclined to match the surface shape of the cooling liquid layer, and a molten metal injection device that moves reciprocally in the drum in the direction of the rotational axis of the drum and injects a molten metal jet onto the cooling liquid layer. a nozzle, a rotating device for the drum, and a control means for controlling the rotating device in accordance with a radius of the inner circumferential surface of the drum at an injection position of the molten metal injection nozzle so that the circumferential speed of the inner circumferential surface of the drum is constant. Fine metal wire manufacturing equipment.