JP3025366B2 - Mold unit of continuous casting machine, mold structure and mold unit recombination method - 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 unit, a mold structure, and a method for assembling a mold unit of a continuous casting machine.
The continuous caster casts molten steel in a bottomless mold, coated powder on the molten steel surface in the mold, and primary cooled in the mold,
This is a facility that solidifies by secondary cooling in a group of guide rolls and then pulls out the rolls with a pulling roll to produce cast slabs. In this continuous casting machine, vertical vibration for vertically vibrating the mold has been performed for a long time to prevent the mold surface from being damaged by the cast slab to be drawn. However, in the case of vertical vibration alone, the quality of the slab deteriorates due to poor penetration of powder into the gap between the slab and the mold, breakout due to seizure between the mold copper plate and the slab, and melting of the slab copper plate. There was a limit to high-speed casting due to losses. Therefore, in recent years, horizontal vibration for vibrating the mold in the horizontal direction has been applied in addition to vertical vibration in order to improve powder penetration and to further improve cast slab quality and enable high-speed casting.

[0002]

2. Description of the Related Art In a conventional continuous casting machine,
A vertical vibration mold that performs only vertical vibration adopts a so-called single frame structure. The single frame refers to a fixed-side long side frame, a free-side long side frame and a pair of short side frames arranged to form a rectangular cavity. The mold unit is configured to be mounted on a mold table and vibrated up and down by an appropriate oscillation device for each mold table. In addition, the mold of the vertical and horizontal vibration specification that performs the vertical vibration and the horizontal vibration adopts a so-called double frame structure. This double frame is a pair of long side frames that constitute the mold (this is called the inner frame)
, An outer frame is provided around the inner frame, and a horizontal vibration device is attached between the outer frame and the inner frame to horizontally vibrate the inner frame. The mold unit is configured such that the vertical vibration is caused to vibrate up and down together with the mold table by the oscillation device as in the case of the single frame.

[0003] As described above, the mold unit of the vertical vibration specification and the mold unit of the vertical and horizontal vibration specification are different in use (the latter is more suitable for high quality cast slab than the former) or performance (the latter is more suitable for high speed casting than the former). Not only is there a difference,
Regarding the physical structure, in the vertical vibration type mold unit, the fixed side long side frame is fixed to the side frame (frame for mounting on the mold table) as seen in Japanese Patent Publication No. 58-55856. However, in a mold unit that performs horizontal vibration, a pair of long-side frames must be separated and approached to each other. In addition, the mold frame has a double structure (double frame) in order to mount a horizontal vibration device. There is a remarkable difference in structure that the size becomes large. Therefore, the idea of pursuing common possibilities between the two has never occurred in the design philosophy, and as a result, the design of the mold unit of the continuous casting machine has been progressing in the direction of specialization for many years. Therefore, there is no possibility of being shared by any existing casting machines. For this reason, when the slab size (especially the thickness) is different, it is necessary to prepare a plurality of dedicated units including spares, and the equipment cost is high.

[0004]

The casting method to which horizontal vibration is applied is very effective in improving the quality of the slab, but depending on the type of steel, sufficient quality may be obtained only by vertical vibration. . In such a case, in the conventional casting machine, there was no method other than exchanging the entire mold unit from the vertical and horizontal vibration type to the vertical vibration type. The reverse is also true. This operation requires removing all of the mold units including the mold table, and assembling the entire mold unit with different specifications, which requires a great deal of labor and time, and significantly reduces the operation rate. was there. So in many casting machines,
By giving up common use, it is configured to focus on either one of the specifications, depending on the steel type, the slab quality may be insufficient,
Alternatively, there is a problem of lack of adaptability such as excessive facilities.

The present invention has been made in view of the above circumstances, and provides a mold unit, a mold structure, and a method of recombining a mold unit which can be easily rearranged between a mold unit having a vertical vibration specification and a mold unit having a horizontal vibration specification. With the goal. Another object of the present invention is to provide a mold structure that can reduce equipment costs.

[0006]

According to the present invention, there is provided a mold unit having a vertical vibration specification, a mold table, a fixed long side frame, a free long side frame and a pair of short side frames for forming a mold. A slab width changing device attached to the short side frame, a holding means for holding the fixed long side frame and the free long side frame, a side frame detachably fixed on the mold table, and a fixed side length Fixing means for fixing the side frame to the side frame, and as a mold unit of vertical and horizontal vibration specification, a mold table of the vertical vibration specification mold unit, a fixed long side frame, and a free side length. A side frame, a pair of short side frames and a slab width changing device,
An outer frame disposed outside the inner frame including the fixed-side long side frame and the free-side long side frame and removably fixed on the mold table; and a slide for supporting the inner frame slidably in the horizontal direction with respect to the outer frame. A dynamic guide and a horizontal vibration device disposed between the inner frame and the outer frame are provided.

Therefore, the template structure in the present invention is:
(a) As a common part of the mold unit of the vertical vibration specification and vertical and horizontal vibration specification, the mold table, the fixed side long side frame, free side long side frame, and a pair of short side frames and short side frame for forming the mold A slab width changing device to be installed is provided. (B) As a dedicated part for a vertical vibration type mold unit, a side frame detachably fixed on a mold table, a fixed long side frame and a free long side frame are sandwiched. (C) a fixed-side long-side frame and a free-side long-side frame as dedicated parts for a mold unit with vertical and horizontal vibration specifications. Frame, which is arranged outside the inner frame made of and is detachably fixed on the mold table, and the inner frame and the outer frame It is characterized in that it comprises a horizontal vibration device disposed, and a sliding guide for instructing freely horizontally slidable relative to the outer frame inner frame between.

Then, recombination of the template unit is performed as follows based on the above configuration. When rearranging from vertical vibration specifications to vertical and horizontal vibration specifications, remove the side frame, holding means and fixing means from the vertical vibration specification mold unit, and replace the outer frame with an inner frame consisting of a fixed long side frame and a free long side frame. , And fixed on a mold table, supporting the inner frame with respect to the outer frame via a sliding guide, and further disposing a horizontal vibration device between the inner frame and the outer frame. As a result, a mold unit having vertical and horizontal vibration specifications can be obtained. Next, when changing from vertical and horizontal vibration specification to vertical vibration specification, remove the outer frame, horizontal vibration device and sliding guide from the mold unit of vertical and horizontal vibration specification, fix the side frame on the mold table, and fix the fixed side length. The side frame is fixed to the side frame by the fixing means, and the fixed-side long side frame and the free-side long side frame are held by the holding means. As a result, a mold unit having a vertical vibration specification is obtained.

[0009]

As described above, according to the present invention, if only a few special parts are replaced, the vertical vibration specifications can be achieved without replacing important parts such as a mold table, a mold and a slab width changing device which are common parts. Can be recombined between vertical and horizontal vibration specifications, so that the recombining work requires less labor and time, and the recombination is easy, so the casting equipment can be used under the optimal casting conditions for the steel type. . Furthermore, since the mold is shared, the number of spare molds is reduced, and the equipment cost can be reduced.

[0010]

Next, embodiments of the present invention will be described. FIG. 1 shows a mold unit A of a vertical vibration specification. In addition,
Although the left half of the mold unit A is omitted in this drawing,
Actually, it is configured to be left-right symmetric. The mold 1 includes a fixed-side long-side frame 2, a free-side long-side frame 3, and a pair of short-side frames 4. Long-side copper plates 5 and 6 are fixed to the inner surfaces of the fixed-side long-side frame 2 and the free-side long-side frame 3, respectively, and short-side copper plates 7 are also fixed to the inner surface of the short-side frame 4. The short-side frame 4 is inserted between the fixed-side long-side frame 2 and the free-side long-side frame 3, and the fixed-side long-side frame 2 and the free-side long-side frame 3 are fixed to each other by tie bolts 8 as clamping means. Form a rectangular cavity. The thickness of the slab is changed by replacing the short side frame 4 and the short side copper plate 7. At this time, the number of disc springs 9 passed through the tie bolts 8 is increased or decreased to obtain an appropriate tightening torque. . The fixed-side long side frame 2 is bolted to the side frame 11 at the top and bottom ends.
Fixed at 12. Hydraulic cylinder 13 as slab width changing device
The cylinder tube 14 is fixed by passing through a through hole 15 formed in the side frame 11, and the piston rod 16 is connected to the bracket 17 of the short side frame 4. The slab width is changed by the expansion and contraction of the hydraulic cylinder 13. A fixing bracket 18 is formed on the side frame 11, and the side frame 11 is fixed on the mold table 20 when tightened through a fixing bolt 19. Note that the fixing bracket 18 and the fixing bolt 19 constitute a fixing means described in the claims.

The fixed-side long side frame 2 and the free-side long side frame 3 have a water box structure because they need to be cooled during casting, so that cooling water is supplied / discharged through a water supply / drain box 21 and a telescopic water pipe 22. ing. The fixed-side long side frame 2 and the free-side long side frame 3 are respectively provided with electromagnetic coils 23.
The electromagnetic coil 23 is also supported by supports 24 attached to the fixed-side long side frame 2 and the free-side long side frame 3, respectively. The mold table 20 is provided so as to vibrate up and down by an appropriate oscillation device (not shown).

FIGS. 2 and 3 show a state in which the mold unit A having the above structure is completely assembled. Since the mold unit A has a structure that does not horizontally vibrate, the frame for forming the mold is not a double structure with only the fixed-side long side frame 2 and the free-side long side frame 3, and is called a so-called single frame. Is done. The vertical vibration is caused to vibrate up and down together with the mold unit on the mold table 20 by an oscillation device (not shown).

FIG. 4 shows a template unit B which has been rearranged to the vertical and horizontal vibration specifications. Although the left half is also omitted in this figure, it is actually configured to be left-right symmetric. In the mold unit B, the following parts share the members of the mold unit A. Fixed side long side frame 2 Hydraulic cylinder 13 Free side long side frame 3 Mold table 20 A pair of short side frames 4 Telescopic water tube 22 Long side copper plate 5, 6 Electromagnetic coil 23 Short side copper plate 7 And dedicated for horizontal vibration The following components are used as members. Outer frame 31 Sliding guide 32 Horizontal vibration device 36 The outer frame 31 is a frame-shaped frame arranged outside the fixed-side long side frame 2 and the free-side long side frame 3. The upper and lower ends of the fixed-side long side frame 2 and the upper and lower ends of the free-side long side frame 3 are attached to the inner surface on the short side of the outer frame 31 by a sliding guide 32 so as to be slidable in the horizontal direction. The sliding guide 32 is composed of, for example, a linear bearing composed of two retainers 33 and 34 and a roller 35. As described above, since the fixed-side long side frame 2 and the free-side long side frame 3 (hereinafter, may be collectively referred to as an inner frame) and the outer frame 31 have a double frame structure, they are called double frames. You.

A horizontal vibrating device 36 is disposed between the long side of the fixed-side long frame 2 and the long side of the outer frame 31 and between the long side of the free side frame 3 and the long side of the outer frame 31, respectively. The horizontal vibration device 36 is configured by a hydraulic cylinder driven by a servo control device or the like. The outer frame 31 is fixed to the mold table 20 by tightening the fixing bracket 18 through a fixing bolt 19. The outer frame 31 employs a water box structure and has a water supply / drainage function similar to that of the water supply / drainage box 21, and is connected to the inner frames 2 and 3 by a telescopic water pipe 22. In the case of the mold unit B, since the long side of the outer frame 31 supports the side end of the electromagnetic coil 23, the support base 24 used in the mold unit A is not required.

The mold unit B assembled as described above
Are shown in FIGS. In this mold unit B,
Since both the inner frames 2 and 3 are supported by the sliding guide 32 and are slidable in the horizontal direction with respect to the outer frame 31, it is possible to horizontally vibrate the inner frames 2 and 3 by driving the horizontal vibrating device 36. It is possible. And
The vertical vibration is caused to vibrate up and down together with the mold table 20 as in the case of the mold unit A.

The above-mentioned mold units A and B use eight main parts such as the above-mentioned mold and mold table as common parts, so that there is no need to exchange them when the molds are recombined. Only the special parts A and B need to be replaced. Therefore, the recombination operation is much simpler than replacing the entire mold unit, which can save labor and time.
Of course, this means that mold unit B is replaced by mold unit A.
The same applies to the case where recombination is carried out. In this case, the following parts, the side frame 11, the water supply / drainage box 21, the fixing bolt 12, the support 24, and the tie bolt 8 are dedicated parts.
32. The horizontal vibration device 36 is removed, and the above-mentioned dedicated parts are assembled as shown in FIGS.

As described above, according to the present embodiment, even if the mold units are recombined frequently, the operation rate does not decrease so much, so that the mold units can be recombined and operated according to the type of steel. Therefore, it is possible to flexibly respond to the degree of slab quality and the demand for high-speed casting. Further, since the long side frames 2 and 3 and the short side frame 4 constituting the mold are shared, the number of spare molds required can be reduced, and the equipment cost can be reduced.

[0018]

According to the present invention, the vertical vibration type mold unit and the vertical and horizontal vibration type mold unit can be easily exchanged, and the same equipment can be operated with any vibration type. Therefore, it is possible to realize optimum casting conditions for all types of steel. Also, equipment costs can be reduced.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a casting unit A according to an embodiment of the present invention.

FIG. 2 is a plan view of a casting unit A.

FIG. 3 is a partial sectional view taken along line III in FIG. 2;

FIG. 4 is an exploded perspective view of a casting unit B according to one embodiment of the present invention.

FIG. 5 is a plan view of a casting unit B.

6 is a partial sectional view taken along the line VI in FIG. 5;

[Explanation of symbols]

2 Fixed side long side frame 3 Free side long side frame
4 Short side frame 8 Tie bolt 11 Side frame
13 Hydraulic cylinder 18 Fixing bracket 19 Fixing bolt
20 Mold table 31 Outer frame 32 Sliding guide
36 Horizontal vibration device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-106539 (JP, A) JP-A-3-57537 (JP, A) JP-A-5-39739 (JP, U) JP-A-4-39739 83447 (JP, U) JP-A-4-83446 (JP, U) JP-A-4-83445 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B22D 11/04 311 B22D 11/04 317 B22D 11/05 B22D 11/053

Claims (5)

(57) [Claims] 1. A mold unit having a vertical vibration specification, a mold table, a fixed-side long-side frame, a free-side long-side frame and a pair of short-side frames for forming a mold, and a slab attached to the short-side frame. Width changing device, holding means for holding the fixed-side long side frame and the free-side long side frame, a side frame detachably fixed on the mold table, and fixing the fixed-side long side frame to the side frame. A casting unit for a continuous casting machine, comprising: 2. A mold unit having a vertical and horizontal vibration specification, a mold table, a fixed side long side frame, a free side long side frame, a pair of short side frames and a slab width changing device, a fixed side long side frame and a free side length. An outer frame which is arranged outside the inner frame composed of the side frames and is detachably fixed on the mold table; a sliding guide which supports the inner frame so as to be slidable in the horizontal direction with respect to the outer frame; and an inner frame and the outer frame. And a horizontal vibrating device disposed between the mold unit and the continuous casting machine. (A) A mold table, a fixed-side long-side frame, a free-side long-side frame, a pair of short-side frames, and a slab width changing device are provided as common parts of a mold unit of a vertical vibration specification and a vertical and horizontal vibration specification. , (B) as a vertical vibration specification mold unit dedicated part, a side frame detachably fixed on the mold table, a holding means for holding the fixed side long side frame and the free side long side frame,
Fixing means for fixing the fixed-side long-side frame to the side frame, and (c) as a part dedicated to the mold unit of the vertical and horizontal vibration specifications, outside the inner frame including the fixed-side long-side frame and the free-side long-side frame. An outer frame disposed and fixed detachably on a mold table, a horizontal vibrating device disposed between the inner frame and the outer frame, and a slide for supporting the inner frame slidably with respect to the outer frame in a horizontal direction. A mold structure in a continuous casting machine, comprising a moving guide. 4. A mold table wherein the side frame, the holding means and the fixing means are removed from the mold unit according to claim 1, and the outer frame is arranged outside the inner frame comprising the fixed-side long side frame and the free-side long side frame. And fixing the inner frame to the outer frame via a sliding guide, and further arranging a horizontal vibration device between the inner frame and the outer frame to constitute the mold unit according to claim 2. Characteristic method of rearranging a mold unit in a continuous casting machine. 5. The outer frame, the horizontal vibration device and the sliding guide are removed from the mold unit according to claim 2, the side frame is fixed on the mold table, and the fixed-side long side frame is fixed to the side frame by fixing means. 2. A method for reassembling a mold unit in a continuous casting machine, comprising forming the mold unit according to claim 1, wherein the fixed-side long side frame and the free-side long side frame are sandwiched by sandwiching means.