JPH0947848A - Belt type continuous casting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly move a disk roll group loosely fitted to a round shaft and to extend the range of width change of a metallic strip by arranging short side molds to be freely displaced in the width direction of an endless belt between one pair of the endless belts. SOLUTION: In this belt type continuous casting apparatus, the short side mold 5 in the right direction is moved by an actuator 13 through a mold driving frame 46 to the width change of the metallic strip, then a pushing block 18 is simultaneously moved in the right direction by an actuator 17 and the disk roll 12 at the left end is moved to the right direction similarly, advanced to the position whereon a boss part of the adjacent disk roll 12 is abutted and moved while pushing the adjacent disk roll 12 in the right direction successively. Since the shaft 14a loosely fitted with plural disk rolls 12 is formed as the round shaft, the disk rolls 12 are smoothly moved. An intermediate bearing 22a can be moved corresponding to the movement of disk rolls 12, and the range of width change of the metallic strip 7 can be extended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt type continuous casting apparatus configured so that the width of a metal ribbon to be manufactured can be arbitrarily changed.

[0002]

2. Description of the Related Art An outline of a general belt type continuous casting apparatus is shown in FIG. In FIG. 8, the molten metal in the tundish 1 is moved from the molten metal outlet nozzle 2 provided in the lower portion of the tundish 1 to the pulleys 52, 53, 54 arranged opposite to each other.
A short-side mold comprising a pair of endless belts 4 and 4 which are hung over and run on the end, and a plurality of connected short-side block groups which are rotated while being sandwiched between both end portions in the width direction of the endless belts 4 and 4. It is poured into the rectangular mold space formed by.

The molten metal poured into the mold space is cooled and solidified by the cooling box 6 as the short-sided mold consisting of the endless belts 4 and 4 and the copper block moves at the same speed to become a metal ribbon 7. Be carried out. When the casting width is changed, the short-side blocks forming the short-side mold are sequentially fed between the belts to enlarge or move the belt in the width direction to the contracted position.

That is, in the case of producing a metal strip having the maximum width, the short side mold is positioned at the belt side end, and the short side pressing block is set at a position where the short side mold can be pressed through the belt. To form a casting space, and a coolant such as water is supplied over the entire gap between the back surface of the belt and the cooling box.

Further, in the case of manufacturing a thin metal ribbon having a small width, the short side mold is moved to a predetermined position inward in the belt width direction to form a reduced casting space, which is contrary to the above. To do. Thus, when changing the width of the metal ribbon, the short side pressing block is moved forward and backward with respect to the back surface of the belt to change the width.

FIG. 6 is a longitudinal sectional perspective view showing the overall structure of a belt type continuous casting apparatus, showing a belt unit on one side and a short side mold 5 on one side, and FIG. 7 is a VII-VI of FIG.
FIG. 1 is a plan view showing a short-side mold 5, a pressing block, and a group of disk rolls for supporting a belt in a cross-sectional arrow view.

In FIGS. 6 to 7, the cooling box 6 is composed of an upper jet cooling section 6a and a lower pad cooling section 6b. The jet cooling unit 6a cools the back surface of the belt 4 by the jet water flow jetted from the jet nozzle 11 in order to obtain a high heat removal effect. The pad cooling section 6b has a pad structure for removing heat while countering the static pressure of the molten metal, and flows cooling water having a pressure in the water passage 25 (see FIG. 8).

The belt 4 is wound around an upstream pulley 52, a downstream pulley 53, and a steering pulley 54, is given a constant tension by a tension cylinder 61, and a driving force is applied from one of the pulleys. It is given and rotates.

On the other hand, the short-side mold 5 has a structure in which a large number of short-side blocks 55 are connected in order to rotate in synchronization with the belt 4, and runs along a guide 58, and the upstream sprocket 5
6 or the downstream sprocket 57. The short side block 55 can change the width of the mold 51 by moving the guide 58 in the width direction of the belt. If there is a gap between the short-side mold 5 and the belt 4, molten metal will be inserted and form burrs. Therefore, in order to eliminate this gap, means for pressing the belt 4 in the short-side mold 5 portion is provided.

As a holding mechanism for the short-side mold 5, in the lower pad cooling section 6b, a large number of short-side pressing blocks are arranged inside the cooling box 6 in addition to the short-side pressing blocks on both sides of the cooling box 6. The side pressing block is arranged so as to be movable back and forth with respect to the back surface of the belt 4 by driving the pushing device through a rod, and is manufactured by providing a plurality of the short side pressing blocks in the width direction of the cooling box 6. It corresponds to the width change of the metal ribbon.

In the upper jet cooling section 6a, as shown in FIG. 7, in order to bring the short-side mold 5 and the belt 4 into close contact with each other, the pressing block 1 movable in the width direction of the belt 4 is provided.
8 is provided on the back surface of the belt 4, and a group of disk rolls 12 for maintaining the flatness of the belt 4 is provided on the back surface of the belt 4. The pressing block 18 moves in synchronization with the short side mold 5, and the group of disk rolls 12 can be expanded and contracted (expandable and contractable) in the width direction of the belt 4 following the movement of the pressing block 18. There is.

The short side mold 5 is moved in the width direction by the actuator 13 via the mold driving frame 46, and in synchronization with this, the pressing block 1 is moved by the actuator 17.
8 also moves in the width direction and presses the short side mold 5 from the back surface of the belt 4. The bosses of the disc roll 12 are individually passed through the shaft 14, but the shaft 14 has the key groove 1 in the axial direction.
5 is cut, and a key (not shown) is embedded therein so that it can slide.

This key has hook-like projections at both ends and has a structure in which the adjacent disc rolls 12 are connected to each other so that the disc rolls 12 cannot be opened beyond a certain interval. Slide to. Further, the shaft 14 rotates together with the disc roll 12 and is supported by the end bearing 21 and the intermediate bearing 22. A sliding member 9b is incorporated in the pressing block 18 so as to slide with the belt 4 while being pressed by the spring 9a.

A piston header 10 is provided to allow cooling water to flow inside the pressing block 18 even if the short side mold 5 and the pressing block 18 move, and the piston 10a has a short side by an actuator 10b. The fluid that has moved following the mold and the pressing block 18 and has passed through the cooling water adjusting valve 24 is jetted to the belt 4 portion via the jet pipe 11 to cool the belt 4.

[0015]

In the conventional apparatus as described above, a plurality of short side pressing blocks are arranged or the group of disk rolls 12 are moved for changing the width of the metal ribbon. There was such a defect.

(1) Since a large number of short side pressing blocks of the short side mold 5 are required, the inside of the mold becomes complicated, maintenance and inspection require time, and reliability is low.

(2) Since the length of the shaft 14 that supports the disc roll 12 is limited in terms of strength, a bearing 22 is required in the middle of the shaft 14 in a wide mold (metal ribbon). However, since the bearing 22 is fixed, the amount of change in width change is limited.

(3) The shaft 14 has the keyway 1 over the entire length.
5, and a key having hook-shaped projections for connecting the respective disc rolls 12 is embedded in the key groove 15 thereof, the disc roll 12 has a large movement resistance.

(4) Since there is no weir for securing the belt cooling water passage, it cannot be applied to the portion using the pressure water flow, and is limited to the upper part of the mold where the pressure water flow is not used.

(5) There are many drive actuators that move the respective parts in accordance with the change of the mold width, which makes it difficult to occupy the installation space of the actuators, which is complicated.

An object of the present invention is to provide a belt type continuous casting apparatus having a new belt pressing mechanism, which solves the above-mentioned problems of the conventional apparatus.

[0022]

In order to solve this problem, in a belt type continuous casting apparatus according to the present invention, a pair of endless belts, which are arranged to face each other and rotate in opposite directions, and both widthwise sides of the endless belt. Belt-type continuous casting that forms thin casting slabs by forming a casting space with continuously connected short side molds that are conveyed while being sandwiched between the ends, and inject molten metal into the space to cool and solidify to produce thin slabs In the device, the short side mold is disposed between a pair of endless belts so as to be displaceable in the width direction of the belt.

Further, a pressing block which can press the short side mold from the back surface of each of the endless belts, and an axially expandable and contractible disk roll group which maintains the flatness of the pair of endless belts. A plurality of cooling medium supply passages, which are arranged in parallel in the width direction of the endless belt in the width direction of the belt, and the disk roll group and the cooling medium supply passage are expanded or contracted in accordance with the displacement of the short side mold. A drive device and a connecting plate for connecting each disk roll to an adjacent disk roll,
A circular shaft on which a plurality of disc rolls can be loosely fitted and slid, a cooling medium sealing means arranged between an end bearing of the circular shaft and the frame, and a movable bearing provided in the middle of the circular shaft. And is configured to have.

In the belt type continuous casting apparatus of the present invention thus constructed, when the short side mold is moved rightward (or leftward) by the driving means when changing the width of the metal ribbon, another driving means is simultaneously operated. When the pressing block moves to the right (or to the left) due to, and the disk roll also moves in the same way and moves to the right, proceed until it comes into contact with the boss portion of the adjacent disk roll, and successively Move while pressing the disc roll to the right. Also, when moving to the left,
Adjacent disk rolls are hooked by the connecting plates so that the intervals are constant.

The shaft on which the plurality of disc rolls are loosely fitted is a circular shaft, the disc rolls can be smoothly moved, and the intermediate bearing of this shaft is also movably attached. It has a structure that allows a wide range of belt width change.
Further, the cooling medium for cooling the belt is sealed by the frame, the sealing material, the sliding member of the pressing block and the belt, and can be moved when the width of the metal ribbon is changed. Is prevented.

In addition to the above-mentioned structure, the present invention further comprises baffle plates forming a water passage for a cooling medium in parallel with the endless belt so that the baffle plates follow the expansion and contraction movement of the disc roll. Adopt a configuration that can be scaled.

In the case where the baffle plates are arranged so as to be parallel to the belt, the baffle plate is pushed rightward (or leftward) at the tip of the disc rolls by the expansion and contraction movement of the disc roll group. The baffle plates shrink (or expand) while overlapping. As a result, even if the disk roll group expands and contracts, the water channel for the cooling medium formed between the belt and the baffle plate is secured.

Furthermore, in another embodiment of the present invention, in addition to the above-mentioned structure, a drive link for displacing the disk roll group and a drive link for displacing the flow path of the cooling medium are connected to the short side mold frame. To adopt.

As described above, when a structure in which the drive links for expanding and contracting the disk roll group and the cooling medium supply flow path are connected to the short side mold frame is added, the movement of the short side mold frame is adjusted. By connecting the links, the disk roll group, the cooling medium supply flow path, and the expansion / contraction movement of the short side mold can be simultaneously operated. As a result, the actuator and control means provided in the conventional apparatus are eliminated, and the structure around the mold is simplified.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to FIG.
~ It demonstrates by FIG. 1 to 5, the same parts as those of the conventional device shown in FIGS. 6 to 8 are denoted by the same reference numerals and duplicate description will be omitted.

(First Embodiment) First, the first embodiment shown in FIGS. 1 and 2 will be described. In the belt type continuous casting apparatus according to the present embodiment, as described in the conventional apparatus, the pair of endless belts 4 are arranged so as to face each other and run in opposite directions, and the molten metal from the tundish is discharged from the nozzle through the endless belt. 4 and the short side mold 5 are supplied to a casting space to cool and solidify the molten steel to form a metal ribbon. At that time, in order to prevent a gap from being formed between the short side mold 5 and the endless belt 4, a pressing means from the back surface of the belt 4 and a moving means for changing the width of the metal ribbon are provided.

Endless belt 4 accompanying the width change of this metal ribbon
The present invention will be described in detail below in terms of the feature of the present invention regarding the pressing means from the back side of the. 14a is a circular shaft on which the boss portions of a plurality of disc rolls 12 can be loosely fitted and slid, 22a is an intermediate bearing movable along with the width changing movement of the disc roll 12 group, 32 is the frame 31 and the disc roll 1
A cooling water seal flowing between the second group end portion and 33 is a moving seal provided between the intermediate bearing 22 a and the frame 31.

Reference numerals 34 and 35 denote connecting plates which are attached to the disk roll 12 and which have hook-shaped projections at their ends to connect the adjacent disk rolls 12 and which do not open beyond a certain interval.
The connecting state of the connecting plates 34 and 35 is shown in FIG. 2, (a) shows the state where the disc roll 12 is set to the maximum width, and (b) shows the state where the disc roll 12 has the minimum width. The state is set to.

In the belt type continuous casting apparatus of FIGS. 1 and 2 having the above-described structure, the width of the metal ribbon is changed,
When the short side mold 5 is moved rightward in FIG. 1 by the actuator 13 via the mold driving frame 46, the pressing block 18 is simultaneously moved rightward by the actuator 17, and the disk roll 12 at the left end is also rightward. It moves in the direction until it comes into contact with the boss portion of the adjacent disc roll 12, and is moved while sequentially pressing the adjacent disc roll 12 in the right direction.

A shaft 14 on which a plurality of disc rolls 12 are loosely fitted.
Since a has a circular axis, the disk roll 12 can move smoothly. The intermediate bearing 22a is also movable in accordance with this movement, and has a structure in which the width changing range of the metal ribbon 7 can be made large.

Further, the cooling water for cooling the endless belt 4 is sealed at the ends by the seal 32 and the sliding member 9b of the pressing block 18, and these sealing structures also move when the width of the metal ribbon is changed. Since it is made possible, the splash of cooling water is prevented.

Next, when the short-side mold 5 reduced in the above-described manner is moved to the opposite left direction, the actuators 13 and 17 are operated to the left, and the short-side mold 5 moves to the left. The pressing block 18 also moves to the left, starts moving from the disk roll 12 at the left end, and the connecting plate 35 is hooked by the hook-shaped projections of the connecting plate 35 and the adjacent disk roll 12 moves, and sequentially. , The adjacent disc rolls 12 are pulled to the left and moved, and at that time, each disc roll 12
Is set by the connecting plates 34 and 35 so as to be constant.

As described above, in this embodiment, the movement of the pressing block 18, the movement of the disk rolls 12 and the movement of the intermediate bearing 22a are coordinated with the movement of the short side mold 5, so that the circular shaft The group of disk rolls 12 loosely fitted into 14a can be moved smoothly, and the range of changing the width of the metal ribbon can be widened.

(Second Embodiment) Next, a second embodiment of the present invention will be described with reference to FIGS. In FIGS. 3 and 4, reference numerals 40 and 41 are parallel to the endless belt 4, and are baffle plates that are arranged so as to intersect with each other and form water channels of the cooling medium, which can be expanded / contracted by following the expansion / contraction movement of the disc roll 12. Is configured.

FIG. 4 shows the expansion / contraction state of the baffle plates 40, 41, and FIG. 4 (b) shows the expansion state of the baffle plates 40, 41 when the disc roll 12 is set to the maximum width. FIG. 7C shows the contracted state of the baffle plates 40 and 41 when the disc roll 12 is set to the minimum width. (A) is a side view showing the lower part of the water channel of the cooling medium, and the upper part of the water channel is also shaped to face it, and the cooling medium from the top to the bottom of the cooling box is parallel to the endless belt 4. A waterway is formed so that the water flows. Other configurations are similar to those of the first embodiment.

In the belt type continuous casting apparatus of FIGS. 3 and 4 constructed as above, when the short side mold 5 is moved and the pressing block 18 is moved at the same time as the width of the metal ribbon is changed, Along with this, the group of disk rolls 12 is also expanded and contracted. By this expansion / contraction movement, when the baffle plates 40, 41 are pushed rightward (or leftward) at the tip of the disk roll 12, the baffle plates 40, 41 are reduced (or expanded) while overlapping.

The baffle plate 4 is parallel to the endless belt 4.
Since 0 and 41 are arranged crossing each other, the disk roll 12
Even if the group expands and contracts, the water channel for the cooling medium formed between the endless belt 4 and the baffle plates 40 and 41 is secured,
It has the effect that the water flow flows in an orderly manner.

(Third Embodiment) Finally, a third embodiment of the present invention will be described with reference to FIG. In FIG. 5, 43 is a short side mold frame which is connected to a mold driving frame 46 to move the short side mold 5, 44 is a drive link which is connected to the short side mold frame 43 and expands and contracts the disk roll 12 group, 45
Is a drive link connected to the short side mold frame 43 to expand and contract the cooling medium supply passage, and 46 is a mold drive frame for driving the short side mold.

That is, in the third embodiment, since the displacement of the short-side mold 5, the displacement of the disk rolls 12 and the displacement of the cooling medium supply passage are the same, these three elements are The drive links 44 and 45 are connected to the short side mold frame 43. Other configurations are the same as those in the second embodiment.

In the belt type continuous casting apparatus of FIG. 5 constructed as described above, the group of disc rolls 12 linked to the pressing block 18 is moved at the same time as the movement of the short side mold 5 is accompanied by the width change of the metal ribbon. And the expansion and contraction of the cooling medium supply flow path are adjusted in accordance with the movement of the short side mold frame 43.
It is possible to operate simultaneously by connecting 4,45. As a result, the actuator and the control means provided in the conventional apparatus are eliminated, so that the structure around the mold is simplified and simultaneous operation is guaranteed.

[0046]

According to the belt type continuous casting apparatus of the present invention, the following effects can be obtained.

(1) A coupling plate for coupling the disc rolls on both sides of each disc roll, a circular shaft on which a plurality of disc rolls can be loosely fitted and slid, and between the end bearing of the circular shaft and the frame. Since the cooling medium sealing means provided and the movable bearing provided in the middle of the circular shaft are provided, the disc roll group loosely fitted to the circular shaft can move smoothly, and the metal ribbon This has the effect of widening the range of width change.

(2) In addition to the structure of (1) above, baffle plates forming a water passage for a cooling medium are arranged in parallel with the endless belt so as to follow the expansion / contraction movement of the disc roll. In the structure configured to be expandable / contractible, a water passage for the cooling medium is secured, the water flow is not disturbed, and the heat transfer effect is improved. It can also be used in parts that use a pressurized water stream.

(3) In addition to the configurations of (1) and (2) above,
As a mechanism for expanding and contracting the disk roll group and the cooling medium supply flow path in response to the displacement of the short side mold, a short side mold frame connected to the mold driving frame for displacing the short side mold, and the same short side mold frame A drive link that is connected to the above to displace the disk roll group and a drive link that is connected to the short side mold frame and displaces the supply channel of the cooling medium are composed of the actuator and the control provided in the conventional device. The means is abolished, the structure around the mold is simplified, and there is an effect that maintenance and inspection are easy.

As described above, the belt type continuous casting apparatus of the present invention has a simpler structure than the conventional apparatus, is easy to maintain and inspect, and has improved reliability, and the operability of the belt type continuous casting apparatus is improved. It has the effect of further increasing the value and is extremely useful in industry.

[Brief description of drawings]

FIG. 1 is a plan view showing a schematic configuration of a moving mechanism for supporting a short side mold and a disc roll according to a first embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of movement of a disk roll according to the first embodiment of the present invention.

FIG. 3 is a plan view showing a schematic configuration of a moving mechanism for supporting a short side mold and a disc roll according to a second embodiment of the invention.

FIG. 4 is an enlarged view of a main part of movement of a disc roll and a baffle plate according to a second embodiment of the present invention.

FIG. 5 is a plan view showing a schematic configuration of a moving mechanism for supporting a short side mold and a disc roll according to a third embodiment of the present invention.

FIG. 6 is a longitudinal sectional perspective view showing the overall configuration of a belt type continuous casting device.

7 is a plan view showing a schematic configuration of a moving mechanism of a short-side mold and a disc roll support, which is a sectional view taken along line VII-VII of FIG.

FIG. 8 is an explanatory view showing an outline of a conventional general belt type continuous casting device.

[Explanation of symbols]

 1 Tundish 2 Nozzle 4 Belt 5 Short Side Mold 6 Cooling Box 7 Metal Strip 10 Piston Header 10a Piston 10b Actuator 11 Jet Tube 12 Disc Roll 13 Actuator 14 Shaft 14a Shaft 17 Actuator 18 Pressing Block 21 Bearing 22 Bearing 22a Bearing 32 Seal 33 Seal 34 Connection plate 35 Connection plate 40 Baffle plate 41 Baffle plate 43 Short side mold frame 44 Drive link 45 Drive link 46 Mold drive frame

Claims (3)

[Claims] 1. A casting space comprising a pair of endless belts that are arranged opposite to each other and rotate in mutually opposite directions, and continuously connected short-side molds that are conveyed while being sandwiched between both widthwise end portions of the endless belt. Is a belt-type continuous casting device for producing a thin slab by pouring molten metal into the same space and cooling and solidifying the molten metal, wherein the short side mold is the width direction of the belt between the pair of endless belts. And a pressing block that can press the short-side mold from the back side of each of the endless belts and an axial direction that maintains the flatness of the pair of endless belts. A group of disc rolls, a plurality of cooling medium supply passages arranged in parallel in the width direction of the belt on the back side of the endless belt, the disc roll group and the cooling medium supply passage, the short side Expands in response to mold displacement A connecting plate for connecting each of the disc rolls to an adjacent disc roll, a circular shaft on which the plurality of disc rolls can be loosely fitted and slid, and an end bearing of the circular shaft. A belt type continuous casting apparatus comprising: a cooling medium sealing means disposed between frames; and a movable bearing provided in the middle of the circular shaft. 2. A baffle plate that forms a water passage for a cooling medium is arranged in parallel with the endless belt so that the baffle plate can be expanded / contracted by following the expansion / contraction movement of the disk roll. The belt-type continuous casting apparatus according to claim 1, wherein 3. A drive link for displacing the disk roll group and a drive link for displacing the cooling medium supply passage are connected to the short side mold frame. The belt type continuous casting device according to claim 2.