JPH06254665A - Cast billet thickness changing device in top zone of roller apron in continuous casting equipment - Google Patents

Abstract

PURPOSE:To shorten time required for changing thickness of a cast billet. CONSTITUTION:In a usual continuous casting equipment, a long time is required for changing the thickness of cast billet since both of a mold and an exclusive roller apron in the top zone are exchanged. In the equipment, a frame 3 by which the top zone is constituted consists of a movable side frame 3b and a fixed side frame 3a which are horizontally opposed with each other. Thus, time required for changing the thickness of cast billet 7 is remarkably shortened since changing is carried out by nearing and parting the opposing frames 3a and 3b each other with a worm jack 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slab thickness changing device for a top zone of a roller apron in a continuous casting facility.

[0002]

2. Description of the Related Art Generally, a long slab is formed between a mold in a continuous casting facility and a pinch roll provided on the downstream side for forming a slab and cooling the slab. Roller aprons are provided over the distance. This roller apron is designed to support a large molten steel pressure until the shell of the slab is completely solidified by the cooling water injected from the outside. And this roller apron has two zones
One of the zones is for forming slabs of different sizes.It is provided directly under the mold and can be attached and detached together with the mold. -A lapron (this is called the lalapron's topzone), the other one is connected to it and is a shared locomotive that can be adjusted for use with any size. -It consists of a la apron (this is called a bending zone). Of these, the former exclusive roll apron is a guide roll or
It is composed of a ring grid and the like, and the adjustment of the roll interval of the latter shared roll apron is the same from the inside and the outside so that the center of each roll or roll segment is not displaced. It is constructed so that only the amount can be adjusted by a hydraulic motor or the like.
No. 12, Japanese Utility Model Publication No. 63-157457).

As described above, there is a problem that the top zone of the roller apron in a general continuous casting facility must be replaced together with the mold when changing the thickness of the slab, and by extension, various types. There was a problem that a top zone with a thickness of the cast piece had to be prepared.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its gist is to: 1) Between the mold and the bending zone of the roll apron. In a top zone that is arranged substantially vertically, the frame of the top zone is composed of a movable side frame and a fixed side frame that face each other in the horizontal direction, and these frames are mutually connected. The slab thickness changing device for the top zone of the roller apron in the continuous casting equipment is characterized in that the slab is connected to and away from the slab so that the thickness of the slab can be changed. -A top zone arranged between a fold and a bending zone of a roller apron, the top zone being provided with a substantially vertical movable side frame and a substantially vertical fixed side frame. Ring grid and guide roll segment The integrally formed, and these frame - in emissions of the slab thickness sorter - B in the continuous casting plant, characterized in that linked each other so as to be closer to and away from the beam - Raepuron of Toppuzo.

[0005]

The present invention will be described in detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 is a side view of an embodiment of the present invention, FIG. 2 is a plan view taken along the arrow P of FIG. 1, and the left side of the center line a shows a sectional view taken along the arrow A of FIG. Figure 3 shows the figure
FIG. 4 is a sectional view of a main part.

The top zone thickness changing device of the roller apron of this embodiment is suitable for continuous casting equipment for high speed slab casting.

Reference numeral 1 is a mold, and immediately below this mold 1, a top zone 2 of a roll apron is arranged.
Below the top zone 2 is the second roll apron
Bending zone 1A which is a zone of The entire frame 3 of the top zone 2 includes a fixed side frame (also referred to as an R outer side frame) 3a and a movable side frame.
Frame (also referred to as R inner frame) 3b.

The fixed frame 3a and the movable frame 3b support the guide roll segment 4 shown on the left side of FIG. 2 and the cooling grid 5 shown on the right side of FIG. The slab 7 that is pulled out from the mold 1 is held. Further, the fixed side frame 3a is provided with end face rolls 8 for holding both end faces of the cast slab 7. These frames 3a and 3b are assembled in advance, and when they are attached to or removed from the continuous casting equipment, hooks (not shown) of the cranes are engaged with the support arms 9 to move them. Be seen.

Here, the fixed side frame 3a and the movable side frame 3b are arranged so as to approach and separate in the direction of the thickness T of the cast piece 7, and the thickness of the cast piece 7 can be changed. You can do it. That is, a total of four worm jacks 10, 10, ... Are provided on the left and right sides of the overall frame 3 in a substantially horizontal manner, and the fixed side frame 3a and the movable side frame 3a are provided. The worm 3b is connected via these worm jacks 10. Therefore, when these worm jacks 10 are driven, the movable frame 3b approaches and separates from the fixed frame 3a, and the thickness of the cast slab 7 can be changed.

These worm jacks 10 horizontally penetrate through the frames 3a and 3b, and the fixed side frame.
A guide shaft 12 rotatably supported by a bearing 11 of the frame 3a
And a worm wheel 13 screwed to the end of the guide shaft 12 on the fixed frame 3a side, and a worm 14 meshing with the worm wheel 13.
The end of the guide shaft 12 on the movable frame 3b side is supported by the movable frame 3b via a bearing 15 which is rotatable and axially locked.

The four worms 14 are provided above and below the left and right sides, but the two worms 1 in the upper stage are provided.
The 4 comrades are connected by the upper drive shaft 16 and the lower 2
The two worms 14 are connected by a lower drive shaft 17. A hydraulic motor 18 is attached to each of the upper and lower worms 14 on the right side in FIG. 1 so as to drive the upper and lower drive shafts 16 and 17 separately. .

Therefore, the upper and lower worms 14
Is attached to the left side of FIG.
These bevel gears 19 are connected by a tuning shaft 20 to tune the upper and lower drive shafts 16 and 17,
As a result, the four warm jacks 10 are tuned. A synchro oscillator 21 is attached to the upper bevel gear 19.

Next, the operation of this embodiment described above will be described. To change the thickness T of the slab 7, if the mold 1 is replaced with a predetermined one and the two hydraulic motors 18 are driven, the four worm jacks 10 are driven and the fixed side frame is driven. Since the movable frame 3b approaches or separates from the frame 3a, the thickness of the top zone 2 of the roller apron can be changed. Then, the bending zone 1A of the roller apron and the pinch roll (not shown) are also subjected to a predetermined thickness change. At this time, the upper and lower worm jacks 1
Since 0 is connected by the tuning shaft 20, each of the warm jacks 10 is driven while being synchronized. Since the rotational speeds of these hydraulic motors 18 are detected by the synchro oscillator 21, the amount of change is detected from the thickness T of the slab 7 set at the beginning of operation to determine the set value of the thickness T. be able to.

Next, the outline of the entire structure of the top zone 2 of the roller apron of this embodiment and the details of the cooling grid 5 will be described. As shown in FIG. 3, the top zone 2 has a cooling grid 5 disposed above, that is, directly below the mold, and a guide roll segment 4 disposed directly below the cooling grid 5, and both of them form an entire frame 3. Are integrally supported by. The cooling grid 5 and the guide roll segment 4 are provided with a large number of cooling sprays (not shown) so that the surface of the cast slab 7 is cooled by a constant pattern.

The cooling grid 5 is composed of a back frame 22 and a wear plate 23 lined with the back frame 22. Of course, the cooling spray is provided in place but not shown. At both ends of the fixed-side and movable-side back frames 22 (only the right side is shown in FIG. 2), supporting portions 24 are respectively provided so as to project, and the supporting portions 24 are connected to the movable-side frames 3b and 3b. The fixed side frame 3a is supported by side frames 25, 25 respectively formed.

That is, the side frames 25 are formed with recesses 26 that are opened upward. The support portions 24 of the back frame 22 are fitted into the recesses 26 from above, and horizontal with a push bolt 27. It is pressed in a fixed shape and fixed. A liner shim 28 is provided so as to oppose the pressing direction of the push bolt 27. Therefore, this
According to the ring grid 5, the entire frame 3 can be used as it is when the worn wear plate 23 is replaced or when the liner shim 28 is replaced. The thickness T of the cast slab 7 can be changed by replacing the liner shim 28. In such a case, these can be replaced without removing the entire frame 3, so that the replacement time of the cooling grid 5 can be extremely shortened as compared with the conventional example in which the entire frame is replaced.

[0017]

According to the present invention, the thickness change of the slab in the top zone of the roller apron is performed on the spot without replacing the entire top zone as in the common roller apron. The time can be greatly reduced, and the production cost can be reduced. Moreover, the top zone
Since it can be adjusted, the dedicated roll for each size
You don't need a lapron. Moreover, since the top zones arranged in a substantially vertical shape are composed of a pair of frames and are moved toward and away from each other, the adjusting means can be simplified. In addition,
The area under which breakouts are likely to occur is supported by a cooling grid on the surface pressure, and the lower part is supported by a guide roll, which has a high effect of preventing breakout accidents and ensures safe operation. It is possible.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention.

2 is a plan view taken along the arrow P in FIG. 1, where the left side of the center line a is a cross section taken along the arrow A of FIG. 3, and the right side is a cross section taken along the arrow B of FIG.

FIG. 3 is a sectional view of a main part.

[Explanation of symbols]

1 ... Mold, 1A ... Bending zone, 2 ... Top zone, 3 ... Overall frame, 3a ... Fixed side frame, 3
b ... movable side frame, 7 ... cast slab, 10 ... worm jack, T ... thickness

Claims (2)

[Claims] 1. A top zone which is arranged substantially vertically between a mold and a bending zone of a roller apron, wherein the frames of the top zone are horizontally opposed to each other on a movable side. -Frame and fixed side frame, these frames
A slab thickness changing device for a top zone of a roller apron in a continuous casting facility, characterized in that the slabs are connected so that they can approach and separate from each other to change the thickness of the slab. 2. A top zone disposed between a mold and a bending zone of a roller apron, wherein a substantially vertical movable side frame and a substantially vertical fixed side of the top zone. A rolling grid for a roller apron in a continuous casting facility characterized in that a cooling grid and a guide roll segment are integrally provided on the frame, and these frames are connected so that they can approach and separate from each other. Top zone slab thickness changer.