KR20020097349A - Apparatus for cutting burr of slab in continuous casting machine - Google Patents

Abstract

PURPOSE: An apparatus for removing burr of slab in a continuous casting machine is provided to increase working productivity of the continuous casting machine by performing function of transfer rolls, prevents surface scratches of the slab, and greatly extends life cycle of a cutter by preventing high temperature deterioration of the cutter. CONSTITUTION: The apparatus for removing burr of slab in a continuous casting machine comprises a plurality of cutter knives which are rotationally mounted on a roller(7) that is rotated forward and backward by a driving motor(5); a plural cylinders(50) for vertically ascending or descending the driving motor(5), roller(7) and cutter knives; a sensor(60) which is positioned at the rear of the cutter knives to detect the cut surface of a slab (S) and send determined signals; and a control part(70) for adjusting the cylinders(50) to a determined elevation based on the signals from the sensor(60) and rotating the driving motor(5) in a predetermined direction, wherein backlashing of the driving motor(5) causes the cutter knives to be projected to the outer side of the circumferential surface of the roller(7) by centrifugal force around the roller(7) so that the cutter knives remove burr (P) of the slab (S), or the outer circumferential surface of the cutter knives to be conformable with the circumferential surface of the roller(7) so that the cutter knives function as a transfer roller supporting the slab (S).

Description

Slab cutting device for cutting machine {APPARATUS FOR CUTTING BURR OF SLAB IN CONTINUOUS CASTING MACHINE}

The present invention relates to a device for automatically and effectively removing the cutting tongue (BURR) generated on the cutting surface of the slab at the rear of the cutting equipment of the continuous casting device, more specifically the slab by performing the function of the feed roller during the slab transfer operation It is possible to remove the cutting snow without slowing down the feed speed, thereby improving the productivity of continuous casting equipment, preventing the surface of the slab from scratching, and improving the quality of the slab, and cutting regardless of the steel grade of the slab. The present invention relates to an apparatus for cutting slabs of a player that has been improved to achieve effective work by performing snow removal work.

In general, in the continuous casting facility, as shown in FIG. 9, a thick slab made of iron as a main component is cut by the cutting device 200. In the cutting device, the slab S is formed using a gas torch 210. It is melt cut to a certain size. The slab S melt-cut through the cutting device 200 as described above is fused and formed on the cut surface of the slab S, and the cut tongue P is mainly composed of molten metal.

This cutting snow (P) causes damage to various equipments in the subsequent process, increases the generation of slab (S) media, and should be removed because it hinders the operation of the subsequent process, the related slab cutting snow removing device ( 220 is shown in FIG. 9.

The slab cutting tongue removing apparatus 220 shown in FIG. 9 is a rotary blow type of the conical knife 222, and when the cutting surface of the slab S reaches the upper side of the cutting tongue removing apparatus 220 and stops, Conical knife 222 is rotated by the operation of the hydraulic or air motor 224 so that the cutting tongue (P) is removed from the slab (S) by the end of the cone knife 222 hitting the cutting tongue (P) portion. It is.

However, this conventional method is to remove the cutting tongue (P) in one rotation of the knife, it is difficult to remove the large fusion cutting tongue (P) by only one operation, so the cutting tongue (P) It takes a long time to remove, making it difficult to perform a complete removal. And, if the conventional device 220 is to work the hot hot slab (S) of high temperature, radiant heat and conduction heat from the hot slab (S) is transferred to the shaft 226 of the knife 222 shaft 226 The warpage occurred and accordingly, the rotation of the shaft was not balanced and the frequency of failure was high.

In addition, since the cutting snow (P) is made of a conical shape, and repeatedly hitting only a predetermined position, the worker has to change the hitting position from time to time, and also has the trouble of causing frequent equipment failures. .

On the other hand, a different slab cutting device 240 is shown in FIG. The conventional cutting snow removing device 240 has a hammer type working method, and a plurality of shafts 245 are assembled to a roller 242 rotating at a high speed, and the shafts 245 have a plurality of hammers. When the plate 248 is rotatably mounted and the roller 242 is rotated at a high speed by the driving motor 250, the hammer plate 248 protrudes from the roller 242 by centrifugal force and stops at the upper side thereof. It is a method of hitting the cutting tongue (P) of the slab (S) that is maintained in a state.

Therefore, the hammer plate 248 is rotated at a high speed while the operation is made by continuously hitting the cutting tongue (P), in this manner, when the slab (S) is a hot slab (S), the hammer plate 248 Scratches were formed on the surface of the high-temperature slab S to deteriorate the slab quality.

Therefore, the range of application is not suitable for the hot slab S of high temperature, but the range of use is limited to the cold slab S etc. which have a small influence of the scratch by the hammer plate 248.

In addition, the conventional cutting snow removing device 240 as described above is not suitable for being disposed immediately after the cutting device 200, and at the time of high-speed rotation of the hammer plate 248 by the high speed motor 250, cold Due to the countless hits of the lower surface of the slab (S), a large noise is generated, and when the cutting tongue (P) is removed, the cutting tongue (P) bounces back and forth in a non-directional manner, causing frequent accidents.

In addition, in order to prevent this, when using a booth (not shown) that surrounds such a conventional device, the installation space is consumed a lot, and the excessive installation cost is to have various problems.

In addition, all of the conventional apparatuses 220 and 240 as described above, the slab (S) must be stopped or moved forward and backward to the right position in order to remove the cutting tongue (P), and the like. There was also a problem in the continuous process operation.

The present invention is to solve the conventional problems as described above, its purpose is to perform the function of the feed roller during the slab transfer operation, it is possible to remove the cutting snow without slowing down the slab feed speed work productivity of continuous casting equipment To improve the slab quality by preventing the surface scratches of the slab when removing the cutting snow, and to perform the cutting snow removal work regardless of the steel grade of the hot or cold slab. It is possible to prevent the high temperature degradation of the cutter, and to provide a slab cutting device of the improved machine to extend the service life significantly.

1 is an external perspective view showing a state in which a slab cutting snow removing device of a player according to the present invention is mounted on a roller table of a playing facility;

2 is a perspective view showing a slab cutting snow removing device of the player according to the present invention;

3 is an exploded perspective view showing a slab cutting snow removing device of the player according to the present invention;

Figure 4 is a detailed view showing a state in which the cutter blade is enlarged in diameter by the centrifugal force in the slab cutting snow removing device of the player according to the present invention;

5 is an explanatory view showing a state in which the slab cutting snow removing apparatus of the player according to the present invention removes the cutting snow of the slab;

6 is an operational state diagram of the slab cutting snow removing device of the player according to the present invention,

a) the cutter blade is extended by the winshim force, the rod of the cylinder is slightly lowered,

b) is a cutter blade is the same circumference of the cylindrical body is used as a slab feed roller, for which the rod of the cylinder is slightly raised;

7 is a detailed perspective view of a cutter blade provided in the slab cutting snow removing device of the player according to the present invention;

8 is a deformed structural diagram of a cutter blade provided in the slab cutting device of the machine according to the present invention, a) in the case of a triangular cross section, b) in the case of a round cross section;

9 is a block diagram showing a slab cutting snow removal apparatus of the player according to the prior art;

10 is a block diagram showing another type of slab cutting snow removal apparatus according to the prior art.

<Description of the symbols for the main parts of the drawings>

5 ..... Drive motor 7 ..... Roller

10 .... cutter knife 12 .... cutter blade

14 .... bearing block 22 .... flange

26 .... long hole 33 .... coolant flow path

40 .... rotary joint

45 ... curved surface 50 ... lifting cylinder

60 ... sensor 70 ... control unit

200 ... Slab Cutting Machine S ..... Slabs

P ..... Cutting Snow

The present invention to achieve the above object,

In the device for automatically and effectively removing the cutting edge (BURR) generated on the cutting surface of the slab behind the cutting equipment of the continuous casting device,

A plurality of cutter knives mounted rotatably on a roller capable of forward and reverse rotation by a drive motor; A plurality of lifting cylinders arranged to raise and lower the drive motor, the rollers, and the cutter knives; A sensor positioned on the side of the cutter knife to detect a cutting surface of the slab and to transmit a predetermined signal; and to adjust the lifting cylinder to a predetermined height based on a signal from the sensor, and to adjust the driving motor in a predetermined direction. It includes a control unit for rotating,

The forward and reverse rotation of the drive motor is driven by the centrifugal force of the cutter motors so that the cutter knives protrude outward from the circumferential surface of the roller to remove the slabs, or the outer circumferential surface of the cutter knife coincides with the circumferential surface of the roller. By providing a slab cutting snow removing device of the player, characterized in that configured to act as a feed roller for supporting the slab.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

The slab cutting tongue removing device 1 of the player according to the present invention, as shown in Figures 1 and 2, the cutting edge (BURR) generated on the cutting surface of the slab (S) in the rear of the cutting equipment of the continuous casting device It will be removed automatically. To this end, the present invention is provided with a plurality of cutter knives 10 rotatably mounted on a roller 7 capable of forward and reverse rotation by a drive motor 5, wherein the roller 7 is rear of the cutting equipment. It is mounted by replacing any roller on the roller table located on the side. Bearing blocks 14 are mounted on both ends of the roller 7, respectively, and a driving motor 5 is mounted on the bearing block 14 at one side of the bearing block 14, and a rotation shaft of the driving motor 5 is provided. Is connected to the shaft of the roller 7 through the reduction gear 16, the operation of the drive motor 5 is configured to rotate the roller 7 forward, reverse.

Meanwhile, a plurality of cutter knives 10 are rotatably mounted on the roller 7, which is shown in FIGS. 3, 7, and 8, and the mounting groove 18 is formed on the outer circumferential surface of the roller 7. The cutter knife 10 is disposed so that the inner surface is in contact with the seating groove 18, the shafts 20 protruding from both side ends of the cutter knife 10 are both side ends of the roller 7. Is rotatably connected to a plurality of flanges 22 connected through a plurality of bolts 22a. To this end, a plurality of arc-shaped long holes 26 are formed in the flange 22 in the circumferential direction so that both shafts 20 of the cutter knives 10 are rotatably fitted in correspondence with the long holes 26. will be.

On the other hand, when the cutter knife 10 is mounted to the roller 7 by using the shaft 20 and the flanges 22 at both ends, as shown in Figure 4 and the rear surface 18a of the mounting groove 18 , A gap K having a predetermined size is formed between the rear surfaces 10c of the cutter knife 10. This is explained later, when the roller 7 is rotated so that the tip of the cutter knife 10 extends outward of the circumference of the roller 7 as its centrifugal force, the rear edge portion 10d of the cutter knife 10 Is supported by the inner edge (18b) of the seating groove (18) to provide a free space to move the shaft 20 of the cutter knife 10 along the arc-shaped long hole (26) of the flange (22).

In addition, although the cutter knives 10 are illustrated as four mounted on the rollers 7 in FIGS. 4 and 5, the present invention is not limited thereto, and the cutter knives 10 may be modified according to the circumstances of the site. The number of mounting of 10) may vary.

In addition, the cutter knives 10 are alternately formed in a zigzag manner, with adjacent cutter knives 10 and the cutter blades 12 at their ends intersected with each other. That is, as shown in detail in FIG. 5, since any one of the cutter blades 10 is formed while maintaining a constant interval, when the cutting tongue P is removed, a constant interval is maintained. While removing the cutting tongue (P), the cutter blade 12 of the adjacent cutter knife (10) that follows, the cutting tongue (P) portion that the cutter blade 12 of the preceding cutter knife 10 was not removed And the cutter blades 12 of the cutter knife 10 which are subsequently followed are formed in the same manner as the cutter blades 12 of the cutter knife 10 from which the first cutting tongue P was first removed. Next, the cutter blade 12 of the cutter knife 10 that follows is formed in the same manner as the cutter blade 12 of the cutter knife 10 from which the cutting edge P is removed second, so that the roller 7 One round of repetitive cutting snow (P) can be removed a number of times.

In addition, a coolant flow path 33 is formed at the center of the roller 7, and a plurality of coolant holes 35 are formed at the seating surface side of the roller 7 from the coolant flow path 33, and the roller ( The other side of 7), that is, the opposite side of the side end on which the drive motor 5 is mounted, has a structure in which the cooling water supply pipe 42 is connected through the rotary joint 40.

Accordingly, the coolant introduced into the coolant flow path 33 through the coolant supply pipe 42 may be supplied to the seating groove 18 through the plurality of coolant holes 35, and the cutter blade 12 of the cutter knife 10 may be supplied. ) Can be cooled during the cutting operation (P). In addition, a concave curved portion 45 is formed in the cutter blade 12 of the cutter knife 10 as shown in FIG. 7 to increase the contact area with the cooling water such that the cooling water is curved. It is configured to concentrate on the injection.

Meanwhile, the present invention uses the cooling water as the cooling medium, but the present invention is not limited thereto, but air or other gas or non-combustible fluid may be used as the cooling medium.

The driving motor 5 and the roller 7 and the cutter knife 10 is provided with a plurality of lifting cylinders 50 arranged to move up and down, the lifting cylinder 50 is a hydraulic cylinder or pneumatic cylinder The drive motor 5 and the roller 7 and the cutter knife 10 are vertically arranged to raise and lower to a predetermined height, and the rod 50a moves the bearing block 14 from the bottom. It is configured to hold up.

In addition, the sensor 60, which is located on the side of the cutter knife 10 and detects the cut surface of the slab S and transmits a predetermined signal, is provided with a light transmitting part and a light receiving part (not shown). As a laser-actuated sensor having a, it is located on the rear side of the slab cutting equipment 200 to detect the cut surface of the slab (S), which transmits an electrical signal to the controller 70.

Accordingly, in the controller 70, the cutter knife 10 may remove the cutting tongue P after a few seconds or after a few seconds from the detected cutting surface of the slab S in consideration of such a signal and the slab S moving speed. The driving motor 5 and the elevating cylinder 50 and the like are calculated by calculating whether they reach a possible position.

The manner in which the sensor 60 operates is a known technique of a general laser method, and is cut by the cutter knife 10 based on the signal from the sensor 60 and the slab S moving speed. Since a technique related to timing calculation to remove the signal is also known, a detailed description thereof will be omitted for simplicity.

Therefore, the control unit 70 of the present invention adjusts the lifting cylinder 50 to a predetermined height based on the signal from the sensor 60, and rotates the driving motor 5 in a predetermined direction. As a result, the forward and reverse rotation of the driving motor 5 is driven by the centrifugal force around the roller 7 so that the cutter knives 10 protrude outward from the circumferential surface of the roller 7 and the slab S The cutting edge P of) is removed or the outer peripheral surface of the cutter knife 10 coincides with the circumferential surface of the roller 7 so as to act as a feed roller for supporting the slab S.

Meanwhile, in the present invention, the cutter blade 12 of the cutter knife 10 may be disposed to have a predetermined width so as to deviate from each other with the adjacent cutter blades 12. As illustrated in FIG. 8, the cutter blade 12 may be disposed. They may each have a triangular cross-section, or may have a circular curved shape, and the triangular cross-section may be used in a narrow width of the slab S and a relatively small width of the cutting edge P, such as a billet. Suitable, round ones are suitable for the case of a bloom having a medium size between the slab S and the billet.

In addition, the outer circumferential surface of the cutter blades 12 has a curvature corresponding to the circumferential surface of the roller 7, so that each cutter knife 10 is in close contact with the seating groove 18, the roller 7 and The cutter knives 10 are configured to have the same circumferential surface.

In the present invention configured as described above, as shown in FIG. 1, the sensor 60 scans a laser to the side of the slab S at the rear of the cutting device 200, and accurately detects the cutting plane according to whether the reflected light is received. The signal which detected the cut surface is transmitted to the control part 70. The controller 70 calculates the propagation position of the cutting plane from which the slab cutting tongue P is to be removed in consideration of the transmitted signal and the moving speed of the slab S, for example, 30 m / mim, and moves up and down to correspond thereto. After operating the cylinder 50 to lower it to a certain height, the drive motor 5 is rapidly reversed.

This state is shown in Fig. 6a), which means that the cutter knife 10 protrudes outwardly from the circumference of the roller 7 as the centrifugal force of the cutter knife 10 by the high speed rotation of the roller 7, Likewise, when the roller 7 is reversely rotated, the lifting cylinder 50 pre-rolls the roller 7 to prevent the tip cutter blade 12 of the protruding cutter knife 10 from contacting the outer surface of the slab S. It is a certain height lowered by the height calculated in. In this state, the tip of the cutter blade 12 passes through the portion where the slab S and the cutting tongue P are connected precisely, so that accurate cutting is performed and scratches on the outer surface of the slab S are minimized. do.

Since the coolant is sprayed to the tip of the cutter blade 12 through the coolant flow path 33 and the coolant hole 35 of the roller 7 simultaneously with the removal of the cutting tongue P as described above, Even if the cutting tongue P is removed from the hot slab S, the heat-treated portion of the cutter blade 12 is not deteriorated and the hardness of the cutter knife 10 can be maintained by not causing a change in the metal structure. will be.

In this way, when the removal operation of the front cutting tongue (P) of the slab (S) is completed, the drive motor (5) operates the roller (7) at a low forward rotation of the opposite to the above, such a roller ( 7) the forward rotation of the cutter knife 10 is in close contact with the mounting groove 18 of the roller 7 so that the outer circumferential surface has the same curvature as the circumferential surface of the roller 7 as shown in Figure 6b) . This roller 7 is formed because the position where the shaft 20 of the cutter knife 10 is formed is adjacent to the rear side of the cutter knife 10 and the cutter blade 12 is formed to extend therefrom. The forward rotation of C) causes the cutter knife 10 to be in close contact with the mounting groove 18 of the roller 7 so that its outer circumferential surface forms one concentric circle.

In this case, the roller 7 and the cutter knife 10 maintain a constant distance from the lower surface of the slab S because the cutter knife 10 is in close contact with the roller 7 side as compared with the removal of the cutting tongue P. At this time, as the lifting cylinder 50 raises the roller 7 by a predetermined height, the outer circumferential surfaces of the roller 7 and the cutter knife 10 come into contact with the lower surface of the slab S to transfer the slab S. It can transfer the power to do it. Thus, in this case, the roller 7 and the cutter knife 10 act as feed rollers.

Then, when the sensor 60 detects the rear cut surface of the slab S and generates a signal, the roller 7 and the cutter knife 10 are lowered by the lifting cylinder 50 through the same procedure as described above. Then, the roller 7 and the cutter knife 10 are reversely rotated at a high speed by the driving motor 5 to remove the cutting tongue P of the rear cut surface in the same operation as described above.

As described above, even when the roller 7 and the cutter knife 10 act as feed rollers and are repeatedly operated by the cutting snow removing device, the cooling water is continuously supplied to the cooling water supply pipe 42 to the hot slab S. It is to prevent deterioration of the roller 7 and the cutter knife 10 due to the high temperature radiated or conducted from. At this time, the contact area with the coolant is increased due to the curved portion 45 formed at the tip of the cutter knife 10, so that the cooling efficiency of the roller 7 and the cutter knife 10 is further increased.

According to the present invention as described above, by performing the function of the feed roller 7 during the slab (S) transfer operation, it is possible to remove the cutting tongue (P) without reducing the slab (S) feed speed of the continuous casting equipment It can increase work productivity.

In addition, the roller 7 and the cutter knife 10 are lifted and lowered by the lifting cylinder 50 by a predetermined height at the time of removing the cutting tongue P, thereby removing only the cutting tongue P portion, thereby reducing the slab S. ) Can prevent the surface of the slab (S) quality can be achieved.

In addition, the cooling water is supplied to the roller (7) and the cutter knife (10) when acting as a feed roller or removing the cutting tongue (P) to remove the cutting tongue (P) regardless of the steel grade of the hot slab or cold slab. By doing this, it is possible to achieve an effective cutting snow (P) removal operation, it is to prevent the high temperature degradation of the cutter blade 12 is to obtain an improved effect to greatly extend the service life.

Claims (7)

In the device for automatically and effectively removing the cutting tongue (BURR) generated on the cutting surface of the slab (S) behind the cutting equipment of the continuous casting device, A plurality of cutter knives 10 rotatably mounted on the roller 7 capable of forward and reverse rotation by the drive motor 5; A plurality of lifting cylinders 50 arranged to raise and lower the drive motor 5, the roller 7, and the cutter knife 10; A sensor (60) positioned on the side of the cutter knife (10) for detecting a cut surface of the slab (S) and transmitting a predetermined signal; and the lifting cylinder (50) based on a signal from the sensor (60) And a control unit 70 for adjusting the height to a predetermined height and rotating the driving motor 5 in a predetermined direction. The reverse rotation of the drive motor (5) is the cutter knife 10 by the centrifugal force around the roller (7) protrudes out of the circumferential surface of the roller (7) to cut the cutting tongue (P) of the slab (S) The slab cutting snow removing device of claim 1, wherein the cutter knife 10 is configured to act as a feed roller for supporting the slab S by making the outer circumferential surface of the cutter knife 10 coincide with the circumferential surface of the roller 7. The cutter knife 10 of claim 1, wherein the roller 7 has a mounting groove 18 formed on an outer circumferential surface thereof, and a cutter knife 10 is disposed such that the inner surface of the roller 7 contacts the mounting groove 18. The shafts 20 protruding from both ends of the rollers are rotatably fitted in correspondence with the arc-shaped long holes 26 of the plurality of flanges 22 connected to both ends of the roller 7. Slab cutting device. According to claim 2, The cutter knives 10 are adjacent to the cutter knife 10 and the cutter blade 12 of the front end of each other is formed in a zigzag form so that any one cutter knife 10 is a certain interval When the cutting blade P is removed while maintaining the cutting edge, the cutter blade 12 of the adjacent cutter knife 10 subsequent thereto is cut cutting blade P which the cutter blade 12 of the preceding cutter knife 10 cannot remove. The cutter blade 12 of the cutter knife 10, which is subsequently removed, is subsequently cut in the same manner as the cutter blade 12 of the cutter knife 10 from which the cutter blade 10 was first removed. The cutter blade 12 of the cutter knife 10 which removes the part and then follows is the same as the cutter blade 12 of the cutter knife 10 from which the cutter blade 10 was secondly removed. By removing the part, it is configured to be able to remove a plurality of repeated cutting snow (P) by one rotation of the roller (7). Device for removing slabs of grooving machines. The cooling water passage 33 is formed in the center of the roller 7, and a plurality of cooling water holes 35 are formed on the seating surface side of the roller 7 from the cooling water passage 33. The other side of the roller 7, that is, the side opposite to the side end on which the driving motor 5 is mounted, is connected to the coolant supply pipe 42 through the rotary joint 40, and thus, the coolant flow path 33 through the coolant supply pipe 42. Coolant flowed into the can be supplied to the seating groove 18 through a plurality of coolant holes 35, it is configured to cool the cutter blade 12 of the cutter knife 10 during the cutting snow (P) removal operation Slab cutting snow removing device of the player characterized in that. The concave curved portion 45 is formed in the cutter blade portion 12 of the cutter knife 10 so as to concentrate the sprayed water on the curved portion 45. Slab cutting snow removing device characterized in that configured. According to claim 1, wherein the lifting cylinder 50 is made of a hydraulic cylinder or a pneumatic cylinder, so that the drive motor 5, the roller 7 and the cutter knife 10 can be raised and lowered to a predetermined height. Slab cutting device of the player characterized in that the vertical arrangement, the rod (50a) is configured to support the bearing block (14) from the bottom. The cutter blade 12 of the cutter knife 10 may have a triangular cross section or a circular curved shape, and the triangular cross section may have a slab (S) like a billet. The slab cutting device of the machine characterized by being used for the narrow width of the cutting blade (P) and the relatively small width of the cutting blade (P), and the circular one being configured for the bloom having the intermediate size of the slab (S) and the billet. Removal device.