JP2005193290A - Apparatus for cutting off cast slab in continuous casting facility - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for cutting off a cast slab in a continuous casting facility with which the structure is comparatively simple and the maintenance is easily performed and further, which does not cause the bending and the surface flaw of the cut-off cast slab. <P>SOLUTION: This cast slab cutting-off apparatus is provided with a cast slab cutting-off machine 11 shakably arranged in the drawing direction of the cast slab at the upper part of a cast slab drawing pass-line and having an upper edge and a lower edge disposed at the upper and the lower parts so as to sandwich the cast slab S and cutting off the cast slab S by shifting the lower edge upward, and a rear face roller table 12 for feeding out the cut-off cast slab with this cast slab cutting-off machine 11, and constituted so as to vertically move the cast slab cutting-off machine 11 side of the rear face roller table 12 while synchronizing with the vertical movement of a lower edge supporting member 2 by rotatably arranging the lower edge supporting members 2(19, 20) for supporting the lower edge of the cast slab cutting-off machine 11 and the rear face roller table 12 and also, rotatably arranging the reverse cast slab cutting-off machine 11 side of the rear face roller table 12. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a slab cutting device in a continuous casting facility, and more specifically, a slab having a relatively small cross section (for example, a square slab of 300 mm or less) continuously cast, and its continuous casting pass line (slab drawing). The present invention relates to a slab cutting device for cutting on a pass line.

  The slab cutting method in the continuous casting equipment is to cut the slab in synchronism with the continuously cast slab and the slab cutting machine, and to draw the slab to the downstream side of the cutting machine at high speed. The rear roller table is provided, and the slab after cutting is separated from the subsequent slab continuously cast by the rear roller table.

  As the slab cutting machine, there are a gas cutting method, a mechanical cutting method, and a hydraulic cutting method. In continuous casting equipment for small-section slabs, hydraulic cutting machines (hydraulic cutting machines) are widely used because the slab drawing speed (casting speed) is fast and the cutting cycle is short. In addition, this hydraulic cutting machine has a down cut method and an up cut method (for example, “History of continuous casting technology of steel in Japan”, pages 449 to 451 (Non-Patent Document 1), Japanese Patent Laid-Open No. 10-34426. (See Patent Document 1).

  In a down cut type hydraulic cutting machine, a lower blade is generally arranged on the upstream side of the slab drawing pass line, and an upper blade is arranged on the downstream side, and the upper blade moves downward to cut the cut slab. In this down cut type hydraulic cutting machine, as the upper blade moves downward, the slab to be cut is also pushed down and moved downward. For this reason, the rear roller table arranged on the downstream side of the cutting machine must also be synchronized with the movement of the upper blade, in other words, moved downward in synchronization with the downward movement of the cut slab, and the structure of the rear roller table is It becomes complicated. Further, in the case of the diagonal down cut type hydraulic cutting machine described in Non-Patent Document 1, the upper blade moves diagonally downward (because the cut slab moves diagonally downward), the rear roller table The structure becomes more complex.

  Therefore, in the down cut type hydraulic cutting machine, in order to avoid that the slab to be cut interferes with the rear roller table, the synchronization mechanism for moving the rear roller table downward is a slab drawing It must be placed under the pass line, that is, under the rear roller table, which is an obstacle to maintenance during inspections and troubles. Moreover, it is arrange | positioned under the slab extraction pass line, and its environment is bad and damage to the tuning mechanism is remarkable. Furthermore, some continuous casting equipment having a relatively small cross section (for example, a corner of 300 mm or less or a circular cast piece) such as billet or bloom has about 2 to 4 strands. The interval is small and maintenance is difficult.

  On the other hand, in an up-cut type hydraulic cutting machine, generally, an upper blade is disposed on the upstream side of the slab drawing pass line and a lower blade is disposed on the downstream side, and the lower blade moves upward to cut the cut slab. In this upcut type hydraulic cutting machine, as the lower blade moves upward, the slab to be cut is also pushed up and moved upward. In the case of this hydraulic cutting machine of the up-cut method, cutting can be performed without interfering with the slab to be cut pushed up at the time of cutting even if the rear roller table is fixed.

  However, when cutting the slab to be cut into short pieces, the slab to be cut is lifted upward together with the lower blade, and drops onto the rear roller table immediately after the completion of cutting. In steel materials that dislike the surface flaw of the slab, the indentation flaw that occurs when the slab falls is a problem in product quality. Further, the impact force when the slab is dropped damages the bearing of the rear roller table, the roller itself, and the like. In addition, falling noise is also a problem in the work environment.

  On the other hand, even in the case of long cutting, the cut slab is lifted upward together with the lower blade. At this time, the slab is in a cantilever state where the narrowing point between the upper blade and the lower blade is a support point. The deformation resistance of the hot slab is small, and the slab is deformed by the moment caused by the weight of the slab. In an extreme case, a large bending deformation occurs such that the leading end (downstream end) of the slab to be cut lands on the rear roller table. Such deformation such as bending of the slab becomes an obstacle during conveyance on the roller table, conveyance in the heating furnace, and conveyance of the rolling line in the downstream process after the slab cutting machine.

Therefore, in order to solve the above problem, even in an up-cut type hydraulic cutting machine, the rear roller table is synchronized with the upward movement of the lower blade, that is, synchronized with the upward movement of the slab to be cut. It is conceivable to have a synchronization mechanism that rises, but the mechanism is assumed to be the same mechanism as the above-described downcut method, and the structure becomes complicated, so the merit of the upcut method, that is, the maintenance of the rear roller table is reduced. There is no merit such as easy to do.
Japanese Patent Laid-Open No. 10-34426 History of continuous casting technology of steel in Japan, edited by Japan Iron and Steel Institute, pages 449-451

  The present invention has been made to solve the problems of the upcut type slab cutting machine based on the circumstances described in the background art, and its purpose is a relatively simple structure. It is an object of the present invention to provide a slab cutting device in a continuous casting facility that is easy to maintain and that does not give bending or surface flaws to the slab to be cut.

  The present invention for achieving the above object comprises a slab cutting device having the following configuration. That is, the slab cutting device in the continuous casting facility according to the present invention (Claim 1) is provided above the slab extraction pass line so as to be swingable in the slab extraction direction, and is disposed above and below the slab. A slab cutting machine that has an upper blade and a lower blade and moves the lower blade upward to cut the slab into a predetermined length, and a rear surface for discharging the slab cut by the slab cutting machine A slab cutting device in a continuous casting facility comprising a roller table, wherein a lower blade support member for supporting a lower blade of the slab cutting machine and the rear roller table are provided swingably, and the rear surface By providing the anti-slab cutting machine side of the roller table so as to be rotatable, the slab cutting machine side of the rear roller table is moved up and down in synchronization with the vertical movement of the lower blade support member. Is. In this case, the lower blade support member and the rear roller table may be swingably provided via a suspension member provided on the lower blade support member (Claim 2). It may be swingably provided via a support roller provided on either the member or the rear roller table.

  The slab cutting device in the continuous casting facility according to the present invention (Claim 4) is provided above the slab extraction pass line so as to be swingable in the slab extraction direction, and is disposed above and below the slab. A slab cutting machine that has an upper blade and a lower blade and moves the lower blade upward to cut the slab into a predetermined length, and a rear roller table that discharges the slab cut by the slab cutting machine A slab cutting device in a continuous casting facility comprising a lower blade support member for supporting a lower blade of the slab cutting machine and the rear roller table, and the rear roller table. The slab cutting machine side of the rear roller table is configured to move up and down in synchronization with the vertical movement of the lower blade support member. . In this case, the anti-slab cutting machine side of the rear roller table may be provided so as to be movable via a swinging arm provided so as to be rotatable (Claim 5), or moved via a support roller. It may be provided freely (claim 6).

  The slab cutting device in the continuous casting equipment according to the present invention (Claim 7) is the invention according to Claim 5, wherein the lower blade support member and the rear roller table are the suspension members provided on the lower blade support member. It may be provided so as to be freely rotatable.

  In the slab cutting device in the continuous casting facility according to the present invention (invention 8), the suspension member in the invention of claim 2 or 7 may be a link.

  The slab cutting device in the continuous casting equipment according to the present invention (Claim 9) is the lower blade slide suspension in which the lower blade support member is attached to the lower blade lifting hydraulic cylinder in the invention of the first or fourth aspect. You may provide a board, the lower blade slide provided in this lower blade slide suspension board, and the lower blade attached to this lower blade slide.

  FIG. 1 is a conceptual diagram showing a basic configuration of a slab cutting device in the continuous casting equipment according to the present invention. In the figure, 1 is a slab cutting machine, 2 is a lower blade support member, and 3 is a rear roller table. In the figure, the solid line indicates the state before cutting, and the two-dot chain line indicates the state immediately after the lower blade is raised and cut. Moreover, arrow X shows the advancing direction of a slab.

  In the slab cutting apparatus of FIG. 1a, the slab cutting machine 1 is provided above the slab extraction pass line so as to be swingable via a swing fulcrum A in the slab extraction direction. A downstream side of the rear roller table 3 is rotatably provided on the support member 4 via a rotation fulcrum B. And the lower blade support member 2 which moves up and down of the slab cutting machine 1 is provided with a suspension member 5 via a rotation fulcrum D. The suspension member 5 is provided with the rotation fulcrum C on the upstream side of the rear roller table 3. It is provided so as to be freely rotatable via the.

  In the slab cutting device of FIG. 1b, the slab cutting machine 1 is provided above the slab extraction pass line so as to be swingable through a swing fulcrum A in the slab extraction direction. A downstream side of the rear roller table 3 is rotatably provided on the support member 4 via a rotation fulcrum B. The lower blade support member 2 that moves up and down of the slab cutting machine 1 is configured such that the upstream side of the rear roller table 3 is swingably received by the support roller 6. In this case, the support roller 6 is provided on one of the lower blade support member 2 and the rear roller table 3, and a guide portion is formed on the other.

  In the slab cutting device of FIG. 1c, the slab cutting machine 1 is provided above the slab extraction pass line so as to be swingable via a swing fulcrum A in the slab extraction direction. The downstream side of the rear roller table 3 is provided on a swing arm 7 that is rotatably provided on the support member 4 via a rotation fulcrum B (rotation fulcrum E). And, the lower blade support member 2 that moves up and down of the slab cutting machine 1 is provided such that the upstream side of the rear roller table 3 is rotatably provided via a rotation fulcrum C.

  In the slab cutting device of FIG. 1d, the slab cutting machine 1 is provided above the slab extraction pass line so as to be swingable through a swing fulcrum A in the slab extraction direction. A downstream side of the rear roller table 3 is supported by a support roller 8. And, the lower blade support member 2 that moves up and down of the slab cutting machine 1 is provided such that the upstream side of the rear roller table 3 is rotatably provided via a rotation fulcrum C. In this case, the support roller 8 may be provided on the rear roller table 3, or the rear roller table 3 may be received by the support roller 8.

  As is clear from the basic configuration shown in FIG. 1 above, in the slab cutting device in the continuous casting facility according to the present invention, the lifting operation of the rear roller table 3 when cutting the slab is performed under the slab cutting machine 1. Since the rear roller table 3 is engaged with the blade support member 2 and provided, the rear roller table 3 can be moved upward of the lower blade support member 2 without providing a special lifting device on the rear roller table 3. Can be raised synchronously. As a result, the structure is relatively simple and easy to maintain as compared with the conventional tuning mechanism. Further, there is no dropping, bending, surface flaws, etc. after cutting the cut slab.

  According to the present invention, the structure is relatively simple and easy to maintain, and the slab to be cut is not bent or surface flawed. Further, the cut slab after cutting can be cut without dropping it on the rear roller table and the like, which is safe and at the same time is expected to improve the working environment. In addition, since no special lifting device is required, a reduction in equipment cost can be expected.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 2 is a front view of a slab cutting device in a continuous casting facility according to the present invention, FIG. 3 is a right side view of FIG. 2, FIG. 4 is a drive roller arrangement view as seen from the Y direction of FIG. These are explanatory drawings of the slab cutting machine concerning this invention, Comprising: a is a partial cross section front view, b is a partial cross section side view. In the figure, 11 is a slab cutting machine, and 12 is a rear roller table. In the following description, the left and right are both sides in the direction of travel of the continuously cast slab, and the front and back are the direction of travel of the slab.

  The slab cutting machine 11 includes a pair of left and right suspension plates 14 supported swingably on a gantry 13 of a continuous casting machine, an upper blade frame 15 provided at a lower portion of the suspension plate 14, A hydraulic cylinder 16 provided at the upper end of the blade frame 15, a ram receiving seat 18 that engages with a tip end of a ram (plunger) 17 of the hydraulic cylinder 16, and an upper portion fixed to the ram receiving seat 18. And a pair of left and right lower blade slide suspension plates 19 provided inside the pair of left and right suspension plates 14, and a lower blade slide 20 disposed below the lower blade slide suspension plate 19. Further, the guide groove 21 of the lower blade slide 20 and the guide protrusion 22 of the upper blade frame 15 are slidably engaged with each other. An upper blade 23 is attached to the upper blade frame 15, and a lower blade 24 is attached to the lower blade slide 20. In the present invention, the lower blade slide lifting plate 19 and the lower blade slide 20 are collectively referred to as the lower blade support member 2. Moreover, the code | symbol S is a to-be-cut slab.

  The rear roller table 12 includes a tilt frame 25, rollers 26 disposed on the tilt frame 25 at predetermined intervals, and a chain 27 for driving the rollers 26. The roller shaft of the end roller 26A is pivotally provided on the support frame 28 of the continuous casting machine. In addition, a chain 30 is provided between the motor 29 with a reduction gear installed on the support frame 28 and the roller 26A, and the roller 26 is chain driven.

  The slab cutter 11 and the rear roller table 12 are rotatably engaged as follows. That is, the link 32 is rotatably provided on the side portion of the lower blade slide suspension plate 19 of the slab cutting machine 11 via the pin 31. On the other hand, an interval holding member 33 is provided on the lower surface of the rear end (upstream end) of the rear roller table 12 to hold an interval that does not abut even when the slab cutting machine 11 swings forward. The distance holding member 33 is engaged with the other end of the link 32 through a pin 34 so as to be rotatable.

  Cutting of the to-be-cut slab S by the slab cutting device in the continuous casting equipment having the above configuration is performed as follows. That is, when the to-be-cut slab S continuously cast passes through the upper and lower blades 23 and 24 of the slab cutting machine 11 and reaches the cutting length, the hydraulic cylinder 16 is actuated, and the lower blade slide suspension upper plate 19 and The lower blade 24 rises. With this rise, the link 32 rises and the rear roller table 12 further rises, and the slab S to be cut is cut between the upper blade 23 and the lower blade 24 while raising them. And in this cutting | disconnection, the slab cutting machine 11 rocks | fluctuates ahead synchronizing with the casting speed of the slab S centering on the rocking | fluctuation fulcrum with the mount frame 13. Further, as the slab cutting machine 11 swings, the positions of the pins 31 and 34 are raised and swinged. These movements are made smoothly via the pivoting fulcrum.

  Accordingly, since the rear roller table 12 is raised and lowered in synchronization with the movement of the lower blade 24, the cut slab S after cutting does not fall on the rear roller table 12 or the like. Thereby, there is no indentation flaw produced at the time of dropping, and good surface quality can be maintained. Further, the bent slab S is not bent or deformed during cutting. Furthermore, since the raising operation and the lowering operation of the rear roller table 12 utilize the raising operation and the lowering operation of the slab cutting machine 11, no complicated tuning mechanism, drive mechanism, and control are required. Further, since the cut slab S after cutting does not fall on the rear roller table 12, the roller 26 and its bearing are not damaged, and the long life of the slab cutting device as well as the rear roller table 12 is maintained. Can be achieved. Further, it is not necessary to provide a complicated synchronization mechanism under the rear roller table 12, and maintenance is easy.

  In the above-described embodiment, the configuration in which the roller shaft of the roller 26A at the front end of the rear roller table 12 is rotatably provided on the support frame 28 of the continuous casting machine is described as an example. Separately, a rotation fulcrum may be provided at an appropriate position on the front end side of the rear roller table 12.

  Moreover, in the said embodiment, although the slab cutting machine 11 was made into the example of a vertical upcut system, this invention is not limited to this form, Even if it is a slab cutting machine of a diagonal upcut system, Good. In this case, the tilting central axis is provided in a direction perpendicular to the moving direction of the cutting blade.

  In the above embodiment, one slab cutting device has been described by taking one strand as an example. However, in a casting device having a plurality of strands such as two strands, the slab cutting device can be arranged in parallel according to the number of strands.

It is a key map showing the basic composition of the slab cutting device in the continuous casting equipment concerning the present invention. It is a front view of the slab cutting device in the continuous casting equipment according to the present invention. FIG. 3 is a right side view of FIG. 2. FIG. 3 is a drive roller arrangement diagram viewed from the Y direction in FIG. 2. It is explanatory drawing of the slab cutting machine which concerns on this invention, Comprising: a is a partial cross section front view, b is a partial cross section side view.

Explanation of symbols

1: slab cutting machine 2: lower blade support member 3: rear roller table 4: support member 5: suspension member 6: support roller 7: swing arm 8: support roller A: swing support point B: rotation support point C : Rotating fulcrum D: Rotating fulcrum E: Rotating fulcrum X: Direction of slab travel 11: Slab cutting machine 12: Rear roller table 13: Stand 14: Suspension plate 15: Upper blade frame 16: Hydraulic cylinder 17 : Ram 18: Ram seat 19: Lower blade slide lifting plate 20: Lower blade slide 21: Guide groove 22: Guide protrusion 23: Upper blade 24: Lower blade 25: Tilt frame 26: Roller 27: Chain 28: Support frame 29: Electric motor with reduction gear 30: Chain 31: Pin 32: Link 33: Spacing member 34: Pin S: Slab to be cut

Claims (9)

  The slab is provided above the slab extraction pass line so as to be swingable in the slab extraction direction, and has an upper blade and a lower blade that are respectively disposed above and below the slab and moved the lower blade upward. A slab cutting device in a continuous casting facility comprising a slab cutting machine for cutting a slab cut into a predetermined length and a rear roller table for discharging the slab cut by the slab cutting machine. A lower blade support member for supporting the lower blade of the single-cutting machine and the rear roller table are provided so as to be swingable, and the anti-slab cutting machine side of the rear roller table is provided so as to be rotatable. A slab cutting device in a continuous casting facility, wherein the slab cutting machine side of the rear roller table is moved up and down in synchronization with the vertical movement of the support member.   The slab cutting device in a continuous casting facility according to claim 1, wherein the lower blade support member and the rear roller table are swingably provided via a suspension member provided on the lower blade support member.   The casting in the continuous casting equipment according to claim 1, wherein the lower blade support member and the rear roller table are swingably provided via a support roller provided on either the lower blade support member or the rear roller table. Single cutting device.   The slab is provided above the slab extraction pass line so as to be swingable in the slab extraction direction, and has an upper blade and a lower blade that are respectively disposed above and below the slab and moved the lower blade upward. A slab cutting device in a continuous casting facility comprising a slab cutting machine for cutting a slab cut into a predetermined length and a rear roller table for discharging the slab cut by the slab cutting machine. A lower blade support member that supports the lower blade of the single-cutting machine and the rear roller table are rotatably provided, and the anti-slab cutting machine side of the rear roller table is provided to be movable, thereby supporting the lower blade. A slab cutting device in continuous casting equipment, wherein the slab cutting machine side of the rear roller table is moved up and down in synchronization with the vertical movement of the member.   The slab cutting device in the continuous casting equipment according to claim 4, wherein the anti-slab cutting machine side of the rear roller table is movably provided via a swinging arm provided rotatably.   The slab cutting apparatus in the continuous casting equipment according to claim 4, wherein the anti-slab cutting machine side of the rear roller table is movably provided via a support roller.   The slab cutting device in the continuous casting equipment according to claim 5, wherein the lower blade support member and the rear roller table are rotatably provided via a suspension member provided on the lower blade support member.   The slab cutting device in a continuous casting facility according to claim 2 or 7, wherein the suspension member is a link. The lower blade support member includes a lower blade slide lifting plate attached to the lower blade lifting hydraulic cylinder, a lower blade slide provided on the lower blade slide lifting plate, and a lower blade attached to the lower blade slide. The slab cutting device in the continuous casting equipment according to claim 1 or 4.