JP3077147B2 - Continuous sheet manufacturing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a continuous thin-plate manufacturing facility.

[Prior Art] Conventional thin plate manufacturing equipment generally supplies molten metal 2 contained in a ladle 1 into a tundish 3 as shown in FIG. 6, and is formed at the bottom of the dundish 3. The slab 5 is continuously pulled out of the mold 4 and transported downstream by a large number of guide rolls 6, and the slab 8 is formed by cutting the slab 5 to a required length by a cutting device 7. After reheating in heating furnace 9, edger
The width was reduced by 10 and was horizontally rolled by a horizontal rolling mill 11 to produce a thin plate.

[Problems to be Solved by the Invention] However, in the thin plate manufacturing equipment as described above, since the molten metal 2 in the tundish 3 is directly cooled by the mold 4 to cast the slab 5, the crystal particles of the slab 5 Coarse
It has been difficult to produce high quality sheets.

Further, the cast piece 5 drawn from the mold 4 needs to be gradually cooled while being conveyed to the downstream side by the guide roll 6, and has a radius of curvature when the cast piece 5 shifts from the vertical state to the horizontal state. Since it is necessary to set R to some extent large in order to avoid breakage of the slab 5, the height of the equipment is high. In addition, since a heating furnace 9 is required to reheat the slab 8 which has been cooled and cut to some extent, the slab 8 has a longer line length, which leads to an increase in the size of the entire equipment and an increase in equipment cost.

Further, since the slab 8 is reheated in the heating furnace 9, the energy loss is very large and wasteful.

The present invention has been made in view of the above circumstances, and aims to provide a continuous sheet manufacturing facility capable of efficiently manufacturing a high-quality thin sheet and reducing the size of the entire facility.

[Means for Solving the Problems] According to the present invention, a rotatable stirrer is disposed in a container, and a stirring and shearing force is applied to the molten metal in the container by rotating the stirrer to form a semi-solid metal slurry. A mechanical semi-solid metal slurry manufacturing apparatus as described above, which is connected to the downstream side of the mechanical semi-solid metal slurry manufacturing apparatus, and whose inlet section flow path cross section is elliptical or circular, and the gradual flow path cross section toward the outlet is A flow path having a flattened and outlet section flow path cross section is formed, and in the main body, for generating magnetic fluxes in mutually opposite directions crossing both ends of the flow path in the flattening direction at right angles to the flattening direction. Two electromagnetic devices are built in, and an electromagnetic force is applied to the semi-solid metal slurry in a flattening direction by flowing a current from below to above the semi-solid metal slurry flowing in the flow path. A mold that is, is characterized in that it comprises at least one group or more edger and horizontal rolling mills arranged sequentially alternately downstream of the molding mold, the.

[Operation] Therefore, by rotating a stirrer in a mechanical semi-solid metal slurry manufacturing apparatus, a stirring and shearing force is applied to the molten metal in the container to form a semi-solid metal slurry, and the semi-solid metal slurry is supplied into a molding mold. In the molding mold, the slab is gradually narrowed down from an elliptical or circular cross-sectional shape and discharged as a slab having a rectangular cross-sectional shape. The sheet is roll-formed by a single horizontal rolling mill to produce a thin plate. The semi-solid metal slurry supplied into the molding mold is energized so that an electric current flows from below to above, and both ends of the flow passage in the flattening direction are flattened by the electromagnetic device. Since magnetic fluxes in opposite directions crossing each other at right angles to the direction are generated, electromagnetic force acts on the semi-solid metal slurry in the direction of flattening, and the thinning from an elliptical or circular cross-sectional shape to a rectangular cross-sectional shape is performed. It is done more smoothly.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 5 show an embodiment of the present invention, in which the molten metal 2 supplied from the tundish 3 is subjected to a stirring shear force while controlling the temperature from the solidification start point to crush the growing dendrite crystal structure. A mechanical semi-solid metal slurry manufacturing apparatus 12 is provided, which is capable of uniformly forming fine spherical crystal grains in the molten metal 2 to form a semi-solid metal slurry 37. On the downstream side of the device 12, a molding mold 13 having an inlet channel cross-section that is elliptical and an outlet channel cross-section that is gradually flattened toward the outlet and an outlet channel cross-section is rectangular is connected. An edger 14 and a horizontal rolling mill 15 are sequentially arranged on the downstream side. Incidentally, the cross section of the inlet channel of the molding mold 13 may be circular.

Next, the mechanical semi-solid metal slurry manufacturing apparatus 12 will be described in detail.

As shown in FIG. 2, a hollow cylindrical container 18 covered with a steel shell 16 and provided with a refractory material 17 inside is provided with a casing 19.
And a tundish 3 on top of the container 18
Metal supply pipe 20 for supplying molten metal 2 from
And a heating medium supply pipe 21 for circulating a heating medium for heating the molten metal 2 and a cooling medium supply for circulating a cooling medium for cooling the molten metal 2 between the iron shell 16 and the refractory material 17 of the container 18. Tube 22
Is arranged.

At the lower part of the container 18, a container 25 for discharging a semi-solid metal slurry 37 composed of an iron shell 23 and a refractory material 24 and having a hollow cylindrical portion smaller in diameter than the hollow cylindrical portion of the container 18 is attached. Lumber
A heat medium supply pipe 26 for circulating a heat medium for heating a semi-solid metal slurry 37 is provided between the heat medium supply pipe 26 and the heat medium supply pipe 26.

Another casing 27 is installed on the upper part of the casing 19, and a vertical shaft 30 that can be rotated by a driving device 29 is fitted and supported on a bearing 28 attached to the casing 27,
A vertical fluid pressure cylinder 31 is disposed at the lower end flange portion 30a of the vertical shaft 30.
The piston rod 31 of the fluid pressure cylinder 31
a The lower end is engaged with the upper end flange portion 32a of the stirrer 32, and the power can be transmitted from the vertical shaft 30 to the stirrer 32.
The key 33 is interposed between the flange portions 30a and 32a.

The molten metal 2 stirring section of the stirrer 32 has a polygonal or cylindrical cross-sectional shape, and, for example, a helical iron piece 34 for generating an induced current as a heating means is embedded inside the molten metal 2 stirring section of the stirrer 32, A ceramic guide member 35 located in the container 25 with a smaller diameter than the stirrer 32,
A spiral guide groove 35a is formed on the outer periphery of the guide member 35 by being integrally fixed to the lower end of the stirrer 32.

In the figure, reference numeral 36 denotes a gas discharge pipe provided in the casing 27.

The molding mold 13 is, as shown in FIGS.
Casing of the mechanical semi-solid metal slurry manufacturing apparatus 12
19 At the lower end, the main body 38 is integrally fixed, and the main body 38 has an elliptical cross section at the inlet and a flattened cross section at the outlet toward the outlet, and the cross section at the outlet becomes rectangular. A flow path 39 is formed and magnetic fluxes B in opposite directions crossing both ends of the flow path 39 at right angles to the flattening direction (the direction of the straight line 1 in FIGS. 3 to 5). _1, B ₂ electromagnets 40N for generating electromagnetic device consisting of 40S 40 and the electromagnet 41N, 4
Incorporating an electromagnetic device 41 made of 1S, and further allowing a current to flow upward from below in a direction perpendicular to the paper surface in FIG. 3 to FIG. 5 to the semi-solid metal slurry 37 flowing in the flow path 39, Electromagnetic forces F ₁ and F ₂ can be applied to the semi-solid metal slurry 37 in the flattening direction according to the Fleming's left hand rule.

In the drawing, reference numeral 42 denotes a magnetic shielding plate, and 43 denotes the molding mold 13.
FIG.

 Next, the operation of the above embodiment will be described.

When manufacturing semi-solid metal slurry 37, the hydraulic cylinder 31
The stirrer 32 is lowered by the
The gap between the upper surface of the refractory material 24 is made extremely small, the vertical shaft 30 is driven to rotate the stirrer 32, the gas in the container 18 is sucked and exhausted from the pipe 36, and the iron piece 34 is energized. An induction current is generated to circulate the heat medium through the heat medium supply pipes 21 and 26. Therefore, the stirrer 32 is heated to a desired temperature by the induced current, and the walls of the refractory materials 17, 24 of the containers 18, 25 are heated to the desired temperatures by the heat medium.

When the stirrer 32 and the refractory materials 17 and 24 are heated to a predetermined temperature, the molten metal 2 is supplied from the tundish 3 into the vessel 18 via the molten metal supply pipe 20 and, if necessary, heated to the heat medium supply pipe 21. The medium and the cooling medium are supplied to the cooling medium supply pipe 22, and the heating by the induction current of the stirrer 32 is continued or stopped, and the molten metal 2 is stirred and sheared by the stirrer 32 while controlling the temperature of the molten metal 2. By applying force, the growing dendritic crystal structure is crushed to mix uniform fine spherical crystal grains in the molten metal 2 to produce a semi-solid metal slurry 37. Even when the supply of the molten metal 2 is started, the stirrer
Since the refractory material 32 and the refractory material 17 are heated to a predetermined temperature, the molten metal 2 is not cooled by the stirrer 32 and the refractory material 17, so that the formation of a solidified shell can be prevented.

When the predetermined semi-solid metal slurry 37 is formed, the stirrer 32 is raised by the fluid pressure cylinder 31 to form a substantially X gap between the lower end of the stirrer 32 and the upper surface of the refractory material 24 of the container 25, The slurry 37 is discharged from the container 18 via the container 25 and supplied into the molding mold 13. At this time, the semi-solid metal slurry 37 is formed in the guide groove 35a of the rotating guide member 35.
To be discharged along the semi-solid metal slurry
37 is smoothly discharged from the lower part of the container 10 and supplied into the molding mold 13.

Semi-solid metal slurry 37 supplied into the molding mold 13
Flows down following the cross-sectional shape of the flow channel 39 while being filled in the flow channel 39, and is discharged as a cast piece 43 to the outside. At this time, the semi-solid metal slurry 37 is energized so that a current flows from the lower side to the upper side in the direction perpendicular to the plane of the paper in FIGS. , the magnetic flux B ₁ directed from 41N electromagnet 40S, to 41S, B
₂ is generated so as to cross both ends of the flow path 39 in the flattening direction.
F ₁ and F ₂ act, and the flat thinning from the elliptical cross-sectional shape to the rectangular cross-sectional shape is performed more smoothly.

The rectangular slab 43 discharged from the molding mold 13
After being reduced in width by a semi-solid metal slurry slab edger 14 as shown in FIG. 1, it is horizontally rolled by a semi-solid metal slurry slab horizontal rolling mill 15 to produce a thin plate.

Thus, a high-quality thin plate can be manufactured from the semi-solidified metal slurry 37 in which uniform fine spherical crystal grains are mixed in the molten metal 2 by crushing the growing dendritic crystal structure. The discharged slab 43 does not need to be gradually cooled while being conveyed to the downstream side as in the related art, and the radius of curvature R when the slab 43 is shifted from the vertical state to the horizontal state is the slab The height of the equipment can be reduced because it can be made smaller than before with the strength improvement of 43, and the heating furnace is unnecessary, so the line length is shortened, the whole equipment can be downsized, and the cost can be reduced. Further, since it is not necessary to reheat the slab in the heating furnace as in the related art, energy loss can be suppressed.

In addition, the continuous sheet manufacturing equipment of the present invention is not limited to the above-described embodiment, and a semi-solid metal slurry slab horizontal rolling mill 15 and a semi-solid metal slurry slab edger are provided downstream of the molding mold 13. 14 or a semi-solid metal slurry slab edger 14, a semi-solid metal slurry slab horizontal rolling mill 15 and a semi-solid metal slurry slab edger 14 are sequentially disposed downstream of the molding mold 13. It goes without saying that various changes may be made without departing from the spirit of the present invention.

[Effects of the Invention] As described above, according to the continuous sheet casting equipment of the present invention, it is possible to more smoothly perform the flat thinning of the semi-solid metal slurry from an elliptical cross-sectional shape or a circular cross-sectional shape to a rectangular cross-sectional shape. Therefore, it is possible to produce an excellent effect that a high-quality thin plate can be efficiently manufactured, and the entire equipment can be reduced in size and cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of one embodiment of the present invention, FIG. 2 is a side sectional view of a mechanical semi-solid metal slurry manufacturing apparatus and a forming mold in one embodiment of the present invention, and FIG. III
FIG. 4 is a sectional view taken along line IV-IV of FIG. 2, FIG. 5 is a sectional view taken along line VV of FIG. 2, and FIG. In the figure, 2 is a molten metal, 12 is a mechanical semi-solid metal slurry manufacturing apparatus, 13 is a molding mold, 14 is a semi-solid metal slurry slab edger, 15 is a semi-solid metal slurry slab horizontal rolling machine, 18 is a container, 32 denotes a stirrer, 37 denotes a semi-solid metal slurry, and 39 denotes a flow path.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomotoshi Mochizuki 1st Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Prefecture Inside of Yokohama No. 2 Plant, Ishikawajima-Harima Heavy Industries Co., Ltd. (72) Inventor Hiroyuki Sato Arata Isogo-ku, Yokohama-shi, Kanagawa No. 1, Nakahara-cho, Ishikawajima-Harima Heavy Industries, Ltd., Yokohama No. 2 Factory (56) References JP-A-1-178303 (JP, A) JP-A-1-273650 (JP, A) (58) Fields studied (Int. Cl. ⁷ , DB name) B22D 11/00 B22D 11/04 311 B22D 11/115 B22D 11/12

Claims (1)

(57) [Claims] 1. A mechanical semi-solid metal in which a rotatable stirrer is provided in a container, and by rotating the stirrer, a stirring and shearing force is applied to the molten metal in the container to form a semi-solid metal slurry. A slurry production device, which is connected to the downstream side of the mechanical semi-solid metal slurry production device, has an inlet-portion flow path cross-section that is elliptical or circular, and the flow path cross-section is gradually flattened toward the outlet, and the exit-portion flow path cross-section A rectangular flow path is formed, and two electromagnetic devices for generating magnetic fluxes in mutually opposite directions crossing the flattening direction both ends of the flow path at right angles to the flattening direction are built in the main body, Further, a molding mold is configured to cause an electromagnetic force to act on the semi-solid metal slurry in a flattening direction by flowing an electric current from below to the semi-solid metal slurry flowing in the flow path, Thin continuous production facility for at least one group or more edger and horizontal rolling mill arranged successively alternately on the downstream side of the mold, further comprising a said.