JP3318477B2 - Continuous casting mold - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for continuous casting in which the thickness can be easily changed.

[0002]

2. Description of the Related Art A short side plate of a continuous casting mold is connected to a long side plate via a worm jack or a hydraulic cylinder.
The whole mold is fixed to a holding frame called a DG stand. When the thickness of the slab is changed by changing the cross-sectional dimension in the thickness direction of the steel continuous casting mold, it is impossible to change only the short side plate online. Therefore,
When changing the thickness of the continuous casting slab, a DG stand incorporating the next short side mold is prepared in advance, and the entire DG stand is replaced, and it takes more than two hours to replace. .

Further, as shown in FIG. 7, an attempt is made to solve this problem by making the short side copper plate portion detachable and performing quick replacement of the copper plate portion. In the technique, the copper plate side backup frame 41 and the short side moving device side backup frame 42 are divided by the vertical separation surface 50, and the copper plate side backup frame 41 can be lifted and replaced. In this technique, a projection 48 is provided on the back surface of the copper plate-side backup frame 41, a recess 46 is provided in the short side moving device-side backup frame 42, and the projection 48 fits into the recess 46 and engages with each other in a hook shape. (In-row type), a clamp device 44 is provided at the top of the copper plate side backup frame for clamping. The mold cooling water passage 45 and the secondary cooling water passage 47 are connected by a vertical separation surface 50 between both backup frames.

[0004]

The change of the mold size in the conventional continuous casting is performed when the entire DG stand is replaced.
A lot of time-consuming work such as removal and connection of the piping system for confirming the water and hydraulic pressure, connection of heavy objects, and crane work for heavy objects occurred, which reduced the operation efficiency of the equipment. In addition, the above-mentioned operation requires the number of workers, which is disadvantageous in terms of labor saving.

In the technique of FIG. 7, since the copper-plate-side backup frame is pulled by the clamp device 44, a bending moment acts on the copper-plate-side backup frame, which is a short-side replacement part. In addition, a gap is required to insert the engaging portion (the concave portion 46 and the projection 48) between the copper plate side backup frame and the short side moving device side backup frame. Since the connecting surface of the cooling water passage with the backup frame is a vertical surface, it is difficult to manage the cooling water passage, and there is a possibility that the O-ring for sealing may come off, which is inconvenient. The fixation of the copper plate-side backup frame is also unstable since it is at the two points of the engaging portion and the upper end.

The present invention is an improvement on the technique shown in FIG.
It is an object of the present invention to develop a structure capable of quickly replacing only the short side and to provide a technique for further shortening the replacement work time.

[0007]

SUMMARY OF THE INVENTION The present invention has been developed in order to solve the above-mentioned problems, and the structure of a backup frame for fixing a short-side copper plate has a double structure that can be cut off. A connection part for the cooling water passage to the copper-plate-side backup frame is provided on the top surface of the side-movement-device-side backup frame, and the weight of the steel-plate-side backup frame can be stored. Since the engaging portion is provided, the operation can be performed more stably.

According to the present invention, in a mold in which a short-side backup frame is divided into a copper-plate-side backup frame and a short-side moving device-side backup frame, the copper-plate-side backup frame is formed in an L-shape including an upper horizontal member and a vertical member. A short side moving device side backup frame is provided below the upper horizontal member, and a connection portion of a cooling water passage between the copper plate side backup frame and the short side moving device side backup frame is moved to a lower side of the upper horizontal member and a short side. facing one above the other on the upper surface of the apparatus-side backup frame provided <br/> Rutotomoni, the short-side mobile device side backup frame
Provide concave or convex locking parts at the upper and lower ends,
Up frame faces the concave or convex locking part respectively
To engage with the concave or convex locking portion, and
An engaging body for positioning by inserting into the concave or convex locking part is provided.
It is a casting mold for continuous casting, which is characterized in that the casting mold is used.

[0009] In this mold, before Symbol concave or engager for engaging to the engaging portion of the convex taper in a direction vertical junction surface of the copper plate side backup frame and the short mobile device side backup frame is pressed It is more preferable to use a concave and convex fitting member provided with.

[0010] Further, the mold is provided with the copper plate side backup.
Frame and the backup frame on the short side mobile device side
The upper and lower joint surfaces are naturally in close contact with each other, for example,
It is preferable that the joint be tightly joined by imparting an inclination such that the joint is urged in the direction of close contact by gravity or by providing a fitting.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. 1 to 6 show an embodiment of the present invention. The structure of the backup frame to which the short side copper plate 2 of the mold 1 is fixed is doubled. That is, it is divided into the copper plate side backup frame 3 and the short side moving device side backup frame 4. Copper plate side backup frame 3
Is formed in an L-shape including an upper horizontal member and a vertical member. Then, the copper plate-side backup frame 3 having an L-shape is installed on the short side moving device-side backup frame 4 from above. The backup frame 4 on the short side moving device side is always connected to the short side moving device, that is, the worm jack or the stepping cylinder 10, and is not removed except during overhaul.

The passages 15 and 16 for the mold cooling water 8 in the copper plate side backup frame 3 and the short side moving device side backup frame 4, the copper plate side backup frame 3, respectively.
And the passages 17 and 18 of the secondary cooling water 9 for the foot spray in the short side moving device side backup frame 4 are
These connecting parts are installed on the upper surface of the short side moving device side backup frame 4. Then, the maintenance of the O-ring for sealing the connecting portion of the cooling water passage is easy, and the direction in which the self-weight of the copper plate-side backup frame 3 acts and the O-ring are changed.
Since the direction in which the ring is pressed coincides with the direction, seal leakage hardly occurs. Further, when the copper plate side backup frame 3 and the short side moving device side backup frame 4 are fixed, the backup plate 3 includes a device having a pressing function above the copper plate side backup frame 3, for example, a frame 11 and a hydraulic cylinder 12 shown in FIG. Install devices, bolts, cotters, etc. to ensure reliable sealing. The pressing devices 11 and 12 may be of a slide type and may be moved to the side at the time of replacement.

A recess 21 having a taper 22 as shown in FIG.
If a convex portion that penetrates into the concave portion 21 is provided at a position corresponding to the short-side moving device-side backup frame 4, the copper plate-side backup frame 3 is more closely attached to the short-side moving device-side backup frame 4. And the copper plate taper accuracy is sufficiently obtained. As shown in FIG. 4, the lower end portion 7 of the short side moving device side backup frame 4 is also provided.
The copper plate-side backup frame 3 is closely attached to the short side moving device-side backup frame 4 when a concave portion 24 having a taper 25 is provided at a position corresponding to the concave portion 24 of the copper plate-side backup frame 3. I do. Further, since the upper and lower ends of both backup frames 3, 4 can be completely fixed by these concave and convex engaging portions, it is effective against the force received from the long side when the slab width is changed. Incidentally, as shown in FIG. 3, when the horizontal abutment 23 of both backup frames 3 and 4 and the structure providing the taper, since a structure in which intimate contact with the natural preferred. This structure is not limited to this, and various tapers and fittings can be used.

FIGS. 5 and 6 show a short side replacement process diagram. The copper-plate-side backup frame 3 to be replaced is transported from the upper side to the short-side moving device-side backup frame 4 by hanging it with a crane or the like and lowered and connected as indicated by an arrow 31.
Then, as shown in FIG. 6, by the pressing devices 11 and 12,
As indicated by the arrow 32, the sealing and fixing between the two backup frames 3, 4 are completed. When removing, the opposite work is performed.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention and the conventional method are applied to a slab width of 1500 to 25.
The test was applied to slabs of 00 mm and slab thicknesses of 200, 250 and 300 mm for comparison. In the prior art, the thickness change method is
Batch exchange with mold and dedicated body DG stand,
In the embodiment of the present invention, the change is made by online short-side replacement by a cylinder with position adjustment.

In the conventional method, the time required for changing the thickness required about 2 hours, but in the present invention, the work of only replacing the short side was completed in about 30 minutes.

[0017]

According to the present invention, it has conventionally required two hours to change the thickness of the short side, but this can be reduced to about 30 minutes.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a mold of an embodiment.

FIG. 2 is a cross-sectional view showing a shape of a locking portion of the mold according to the embodiment.

FIG. 3 is a cross-sectional view showing a shape of a joining portion of a mold according to an example.

FIG. 4 is a cross-sectional view showing a shape of a locking portion of the mold according to the embodiment.

FIG. 5 is a process explanatory view of a short side replacement procedure.

FIG. 6 is a process explanatory view of a short side replacement procedure.

FIG. 7 is a sectional view of a conventional short-side exchange mold.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 Short side mold 2 Copper plate 3 Copper plate side backup frame 4 Short side moving device side backup frame 5 Upper and lower joining surfaces 6 Upper locking part 7 Lower locking part 8 Cooling water 9 Secondary cooling water 10 Stepping cylinder 11 Frame 12 Hydraulic cylinder 15 Cooling water passage 16 Secondary cooling water passage 17 Cooling water passage 18 Secondary cooling water passage 21 Upper engaging portion 22 Taper 23 Upper and lower joining surface (taper) 24 Lower engaging portion 25 Taper 31 Arrow 32 Arrow 41 Copper plate side backup frame 42 Short-side moving device side backup frame 43 Foot shoe 44 Clamping device 45 Cooling water passage 46 Recess 47 Secondary cooling passage 48 Projection 50 Separation surface

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B22D 11/04 311 B22D 11/04 317 B22D 11/05

Claims (3)

(57) [Claims] 1. A mold in which a short-side backup frame is divided into a copper plate-side backup frame and a short-side moving device-side backup frame, wherein the copper plate-side backup frame is formed in an L-shape including an upper horizontal member and a vertical member; A short side moving device side backup frame is provided below the upper horizontal member, and a connection portion of a cooling water passage between the copper plate side backup frame and the short side moving device side backup frame is connected to the lower surface of the upper horizontal member and the short side moving device side. When Ru opposed vertically to each other on the upper surface of the backup frame
In both cases, the upper edge of the backup frame on the short side mobile device side and
Provide a concave or convex locking part at the lower end, and
A part where the frame faces the concave or convex locking part, respectively.
The concave or convex engaging portion is engaged with the concave or convex from above.
A casting mold for continuous casting, comprising an engaging body inserted into a convex locking portion for positioning . 2. The concave or convex locking portion and the engaging portion.
The engaging body is a copper plate side backup frame and a short side moving device
The vertical mating surface with the side backup frame is crimped
2. The continuous casting mold according to claim 1, wherein the casting member is an uneven fitting member tapered in a direction . 3. The copper plate-side backup frame and a short side.
Natural upper and lower joint surfaces with the backup frame on the moving device side
3. A structure which comes into close contact with a member.
The mold for continuous casting according to the above.