JPH0763823B2 - Continuous casting cutting equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous casting and cutting device, and more particularly, to a dummy bar that is transferred prior to the start of a continuous casting operation, and a billet, bloom or the like that has been cast. The present invention relates to a continuous casting cutting device for cutting continuous casting pieces.

<Prior Art> When casting a continuous cast piece (hereinafter referred to as a “continuous cast piece”) by a continuous casting device, first, a dummy bar is transferred from the downstream side along the transfer path of the continuous cast piece to use the dummy bar head as a mold. The long continuous cast piece is guided along a predetermined transport path by mounting and then moving the dummy bar to the downstream side while pouring molten steel into the mold. A continuous casting cutting device for cutting the continuous cast piece is provided on the transport path.

Continuous casting and cutting device (hereinafter referred to as "cutting device") that conveys continuous cast pieces in the horizontal direction and performs cutting work at this horizontal conveying part.
The apparatus main body having a gas cutting torch for cutting the continuous cast piece, a clamp mechanism for clamping the continuous cast piece, and a support roller for supporting the long continuous cast piece, the continuous cast piece, and It is composed of a roller group that supports or conveys the dummy bar. The continuous cast piece is clamped by the clamp mechanism to move the apparatus main body in synchronization with the continuous cast piece, and the gas cutting torch is moved in the direction orthogonal to the conveying direction of the continuous cast piece to form the continuous cast piece. You are disconnected.

Therefore, the moving distance of the apparatus body along the conveying direction of the continuous cast piece is set according to the width dimension of the continuous cast piece, the cutting speed for the continuous cast piece, the conveying speed (casting speed) of the continuous cast piece, and the like. .

In addition, a dummy bar that is transferred prior to the start of the casting operation is supported in the range corresponding to the moving range of the apparatus main body and the downstream side thereof, which is the transport path for the continuous cast piece and the dummy bar, and after the start of casting, the continuous operation is continued. A support roller for supporting the slab is provided. This support roller is generally constructed so that it can be retracted downward in accordance with the approach of the gas cutting torch in order to prevent the adherence of slag or the like that occurs with cutting the continuous cast piece. Further, the number of support rollers is appropriately set according to the moving distance of the apparatus main body.

When the continuous cast piece is a billet or a bloom having a small width, the time required for cutting the continuous cast piece is short, and therefore the moving distance of the apparatus body is also short. When the cutting of the continuous cast piece is completed, the separated continuous cast piece is supported by a conveyor device disposed on the downstream side of the cutting device, and the upstream continuous cast piece is a support roller provided on the apparatus main body. Is supported by. For this reason, it is often unnecessary to provide a special support roller in the movement distance range of the apparatus body.

However, in the cutting device which does not have the supporting roller in the moving distance range of the apparatus main body, since the dummy bar is configured by rotatably connecting a plurality of links, the dummy bar is installed before starting the casting operation. When the dummy bar is transferred to the mold side, the tip of the dummy bar may bend and hang down before reaching the supporting roller provided in the apparatus main body, which may hinder the work. For this reason, it is necessary to reciprocate the main body of the apparatus to support the dummy bar by the supporting rollers provided on the main body.

<Problems to be Solved by the Invention> In the above cutting device having the supporting roller configured to be retractable, even if the supporting roller is retracted downward, the slag that accompanies the cutting of the continuous cast piece adheres to the roller surface. Therefore, in this case, there is a possibility that the continuous cast piece may be conveyed or the dummy bar may be conveyed.

Further, in the cutting device configured to be able to support the dummy bar by the support roller provided in the device body, the movement control of the device body when transferring the dummy bar to the mold side before starting the casting operation is complicated, This may increase the manufacturing cost of the device and cause a failure.

An object of the present invention is to provide a novel cutting device that solves the above problems.

<Means for Solving the Problems> In order to solve the above problems, a cutting device according to the present invention includes a device main body arranged on a moving path of a continuous casting piece and a dummy bar, and a moving path provided on the device main body. Clamping means for holding a continuous cast piece that moves along a line, and a clamp means that is provided in the apparatus main body and moves in the moving path direction with the movement of the continuous cast piece by the clamp means and is orthogonal to the moving path direction. Cutting means configured to move the continuous casting piece configured to be movable in a direction, and a cutting locus drawn on the moving path from the cutting start point to the cutting end point of the continuous casting piece cut by the cutting means. A continuous cast piece or a dummy bar which is provided in a position in the direction of the moving path in which the slab is formed and is deviated from the cutting locus and moves along the moving path. And a cantilever roller for performing the operation.

Further, in the cutting device, the cantilever roller is rotatably supported by a supporting means such as a bearing provided on one side along the conveying direction of the continuously cast piece, and the cantilever roller is detachable from the shaft member. It is preferable that it is constituted by a roller member to be mounted.

<Operation> According to the above means, when the dummy bar is transferred to the mold side before starting the casting operation, the dummy bar can be supported and transferred by the cantilever roller.

Further, the cutting means is moved in synchronism with the continuous casting piece by clamping the conveyed continuous casting piece by the clamping means, and at the same time, the cutting means is moved in a direction orthogonal to the conveying direction of the continuous casting piece. The piece can be cut. In the process of cutting the continuous cast piece, slag or the like generated along with the cutting of the continuous cast piece does not adhere to the surface of the cantilever roller,
Moreover, there is no possibility of cutting the cantilever roller by the cutting means.

<Example> An example of a cutting device to which the above means is applied will be described below with reference to the drawings.

1 is a schematic side view of the cutting device, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a schematic front view of the device body, and FIG.
The figure is an illustration of a cantilever roller.

First, a schematic configuration of the cutting device will be described. The cutting device is capable of reciprocating on a pair of rails 1 provided along a moving direction of a continuous cast piece C shown by a two-dot chain line and a dummy bar D shown by a one-dot chain line. The apparatus main body A configured and provided with the cutting means 2, the clamping means 3, the main body drive device 4, and the like, the conveying roller 14, and the cantilever roller 15 arranged in the moving range of the apparatus main body A.
And a supporting roller arranged on the downstream side of the cantilever roller 15.
It is composed of 16 roller conveyors B.

The apparatus main body A clamps the continuous cast piece C by the clamp means 3 configured as described later, and thereby the continuous cast piece C is clamped.
It is configured to be able to move to the downstream side of the continuous cast slab C in the transport direction (hereinafter, this direction is referred to as “arrow a direction”) in synchronization with the above. Then, the continuous casting piece C is cut by the cutting means 2 in the process of the apparatus main body A moving in the direction of the arrow a, and after the cutting is completed, the apparatus main body A is moved by the main body drive device 4 provided in the main body A. It is configured to be driven on the upstream side in the transport direction (hereinafter, this direction is referred to as "arrow b direction"), detect the apparatus origin 5, and can be stopped at this position until the start of the next cutting cycle.

The roller conveyor B supports the dummy bar D transferred in the direction of arrow b by the cantilever roller 15 and the support roller 16 prior to the start of the casting operation, conveys it by the conveying roller 14, and after the start of casting, the arrow a The dummy bar D transported in the direction is supported or transported by the rollers 14 to 16, and the continuous cast piece C transported in the direction of the arrow a can be supported or transported by the rollers 14 to 16 during casting. Is configured.

Next, a specific configuration of each of the above parts will be described.

The cutting means 2 cuts the continuous cast piece C while moving in the direction of the arrow a in synchronism with the continuous cast piece C. In this embodiment, the torch 2 for gas cutting is used. However, the cutting means is not limited to the gas cutting torch 2, and a plasma cutting torch or the like can also be used.

As shown in FIG. 3, the torch 2 is detachably attached to a torch holder 6 configured to be reciprocally rotatable in the directions of arrows c and d. The torch holder 6 has one end attached to a shaft 8a of a torch drive device 8 including a motor, a brake, a speed reducer, a speed changer, and the like provided on an upper portion of a frame 7 which constitutes the apparatus main body A. Therefore, the torch holder 6 is formed in a cantilever shape with one end supported by the shaft 8a.

In the above structure, when the cutting start signal is issued from the control unit, the torch holder 6 and the torch 2 are sequentially driven by the torch drive device 8 in the direction of arrow c at different speeds such as cutting speed and cutting speed, and the continuous cast piece is cut. C is cut, and after the cutting is completed, it is driven in the direction of arrow d to stop at a predetermined retracted position, and is held at this stopped position.

The clamp means 3 clamps the continuous cast slab C to integrally combine the continuous cast slab C and the apparatus main body A, and transmits the carrying force acting on the continuous cast slab C to the apparatus main body A. . Therefore, the clamp means 3 is composed of a pair of clamp levers 9 arranged to face each other, and a drive cylinder 10 for driving the clamp lever 9.

Each clamp lever 9 is rotatably supported by a pin 11 provided on the frame 7. The upper end of one clamp lever 9 is connected to the rod 10a of the drive cylinder 10, and the upper end of the other clamp lever 9 is the drive cylinder 10.
Is connected to the casing 10b. Therefore, the drive cylinder 10 is supported by the pair of clamp levers 9 without being fixed to the frame 7. Further, a clamp claw 9a is attached to the lower end of each clamp lever 9 and the contact portion with the continuous cast piece C.

A cylinder such as an air cylinder or a hydraulic cylinder can be used as the drive cylinder 10, and the air cylinder is used in this embodiment.

In the above structure, when the control unit generates the clamp signal, the pressure air is supplied to the drive cylinder 10. The clamp lever 9 is rotated around the pin 11 by the operation of the drive cylinder 10, and the clamp claw 9a is brought into pressure contact with the side surface of the continuous cast piece C. Therefore, the conveying force acting on the continuous cast piece C is the clamp claw.
It is transmitted to the frame 7, that is, the cutting device A via 9a, the clamp lever 9 and the pin 11.

The main body drive device 4 moves the main body A of the device in the direction of arrow b after cutting the continuous cast piece C.

The main body drive device 4 is configured by combining a motor, a brake, a speed reducer, a transmission, and the like. The driving force of the main body drive device 4 is transmitted to the wheels 13 provided on the frame 7 of the main body A of the apparatus via the transmission mechanism 12.

The device origin 5 defines the retracted position of the device body A, and sets the torch 2 and the measure roller 22 described later at a constant distance at the retracted position. Therefore, a sensor such as a micro switch or a photoelectric sensor is provided at a predetermined position of the rail 1 or the apparatus main body A, and a dog, a photoelectric sensor or the like is provided on the other side.
This device origin 5 may be a stopper.

As shown in FIG. 2, the carrying roller 14 is a roller conveyor B.
Is provided on the upstream side in the direction orthogonal to the transport direction of the continuous cast slab C, and both ends thereof are supported by bearings 14a fixed to the frame 17 of the roller conveyor B. This transport roller 1
4 is configured to be driven by a roller drive device 18 including a motor, a speed reducer, a speed change device, etc., and moves the dummy bar D transferred to the mold side in the direction of arrow b before starting the casting operation. Further, immediately after the start of casting, the dummy bar D is moved in the direction of arrow a, and the continuous cast piece C is conveyed in the direction of arrow a during casting. In this embodiment, two rollers are used as the transport roller 14,
These transport rollers 14 are driven by a roller driving device 18.

The support roller 16 merely supports the transported dummy bar D or the transported continuous cast piece C, and is not particularly given a driving force. The support roller 16 is provided in a direction orthogonal to the direction in which the continuous cast piece C is conveyed, and both ends thereof are supported by a bearing 16a fixed to the frame 17. Then, the dummy bar D or the continuous cast piece C comes into contact with the dummy bar D, and the dummy bar D or the continuous cast piece C is rotated by the transfer force or the transfer force of these.

Like the support roller 16, the cantilever roller 15 is configured to support the continuous cast piece C and the dummy bar D without being given a driving force. This cantilever roller 15 is based on the position of the torch 2 of the apparatus body A in the retracted position,
Are arranged on the downstream side of the continuous cast piece C in the conveying direction, and two sets of pieces corresponding to the width dimension and the thickness dimension of the continuous cast piece C, the cutting speed and the cutting time for the continuous cast piece C such as steel grade. The holding rollers 15 are arranged so as to face each other. The structure of the cantilever roller 15 is shown in FIG.

The cantilever roller 15 is composed of a roller body 15a and a shaft member 15b. The shaft member 15b is rotatably supported by a bearing member 19 fixed to a frame 17, and the roller member 15a.
Is detachably attached to the shaft member 15b with bolts 20.

The roller body 15a is formed in such a size that it can protrude from the center line 21 of the transport path of the continuous cast slab C and the dummy bar D when the roller body 15a is attached to the shaft member 15b.

That is, as shown in FIG. 2, the position of the torch 2 at the start of cutting is preliminarily determined according to conditions such as the dimensions of the continuous cast piece C, the cutting speed with respect to the continuous cast piece C, the cutting speed, and the conveying speed (casting speed). The locus 2c of the torch 2 from 2a to the position 2b of the torch 2 at the end of cutting is set, and two sets of pieces are placed at positions where the free end of the roller body 15a protruding from the center line 21 deviates from the locus 2c. A holding roller 15 is provided. At this time, the free end of the roller body 15a of the cantilever roller 15 disposed on the upstream side of the continuous cast piece C in the conveying direction is located at the position 2 of the torch 2 at the start of cutting.
The cantilever roller 15 which is arranged so as to face a and which is arranged on the downstream side in the conveying direction is arranged so that the free end of the roller body 15a faces the position 2b of the torch 2 at the end of cutting. Therefore, the dummy bar D and the continuous cast piece C transferred around the center line 21
1/2 or more of the dimension in the width direction is the roller body 1 of the cantilever roller 15.
Backed by 5a.

The roller body 15a is formed into a cup shape as a whole. That is, the bottom plate 15a ₂ having a plurality of stupid holes for allowing the bolts 20 to penetrate therethrough is fixed to one end of the cylindrical body 15a ₁ having a predetermined outer diameter by welding or the like. There is. The roller body 15a is secured to the shaft member 15b through the bottom plate 15a _2, the other continuous casting strip C, and projects in the conveying path of the dummy bar D.

The shaft member 15b and the shaft portion 15b _1, is constituted by a flange 15b ₂ which is fixed to one end of the shaft portion 15b _1. In this way, since the cantilever roller 15 is formed in a cantilever shape, the shaft portion
15b ₁ is configured to have a length and a thickness according to the load acting on the roller body 15a. Further, the flange 15b ₂ is formed with a screw portion for screwing the bolt 20 or a burrow hole for penetrating the bolt 20 at a position facing the burrow hole formed in the roller body 15a.

The bearing member 19 is fixed to the frame 17 and rotatably supports the cantilever roller 15. The bearing member 19 has a casing 19b which is formed a chamber 19a for fitting the shaft portion 15b ₁ of the cantilever rollers 15 therein, the bearing 19c is fitted respectively on both sides of the chamber 19a. Also, the chamber 19a has a lid 19
It is sealed by d and is filled with a lubricant such as grease.

When the dummy bar D or the continuous cast piece C is supported by the cantilever roller 15, the cantilever roller 15 bends due to this load. Therefore, in this embodiment, the bearing 19c having the self-aligning function is used.

The shaft member 15b of the cantilever roller 15 is fitted to the bearing 19c of the bearing member 19 configured as described above, and the roller body 15a is fixed to the shaft member 15b with the bolt 20 to fix the cantilever roller 15.
And the cantilever roller 15 can be attached to the frame 17.

In this embodiment, as shown in FIG. 2, two sets of cantilever rollers 15 configured as described above are arranged facing the frame 17 in correspondence with the moving range of the apparatus main assembly A.

In FIGS. 1 and 2, 22 is a measure roller, which is rotatably supported by the frame 17 via a bearing 22a. The major roller 22 is configured to be capable of rotating in contact with the continuous cast slab C, and a pulse oscillator 22b such as a rotary encoder is attached to the shaft end of the roller 22. The length of the continuous cast piece C is detected by detecting the amount of rotation of the measure roller 22 by the pulse oscillator 22b. In addition, the pulse oscillator 22b
Is transmitted to a control unit (not shown), and when the preset cutting length and the detection length of the continuous cast piece C are matched by the control unit, the signal is transmitted to the clamp means 3 and the torch 2 for continuous casting. The clamp operation and the cutting operation for the piece C are started.

Further, 23 is a conveying roller provided on the upstream side and the downstream side of the conveying path of the continuous cast slab C, and 24 is a pinch roller provided above and above the conveying roller 23. These rollers 23, 24 transfer the dummy bar D in the direction of arrow b before starting the casting operation, and move the dummy bar D in the direction of arrow a with the start of casting.
The continuous cast piece C, which is transferred in the direction of arrow C and is cast, is conveyed in the direction of arrow a. Usually, these transport roller 23 and pinch roller 24 are configured as a device separate from the cutting device.

In the cutting device configured as described above, the continuous cast piece C has a width of 16
When a billet of 0 mm is used, when cutting the continuous cast slab C, the cutting speed of the torch 2 is set to 100 mm / min, the cutting speed is set to 300 mm / min, and the transfer speed of the continuous cast slab C is set to 1600 mm / min. , Travel distance of torch 2 (travel distance of device body A)
Is about 1450 mm, and the torch 2 has a locus 2c shown in FIG.
Move along. Further, the width dimension of the dummy bar D applied to the continuous cast slab C having the width is about 120 mm. Then, the dummy bar D is transferred around the center line 21 in the directions of arrows a and b. Therefore, the projecting end of the roller body 15a of the cantilever roller 15 is made to coincide with the center line 21 or is made to project slightly longer than the center line 21, and the roller body 15a is moved along the trajectory 2
By arranging the roller body 15a at a position where it does not overlap with c, the roller body 15a of the cantilever roller 15 is not adversely affected by slag or the like generated along with the cutting of the continuous cast piece C, and the roller body 15a
The dummy bar D can be reliably supported without cutting the a by the torch 2.

Further, when some trouble occurs in the cutting device, the roller body 15a is cut together with the continuous cast piece C, or a defect such as adhesion of slag to the roller body 15a occurs.
Since 15a is configured to be attachable to and detachable from the shaft member 15b, it is possible to easily replace only the roller body 15a.

<Effects of the Invention> As described in detail above, according to the cutting device of the present invention, when the dummy bar is transferred to the mold side before the start of the casting operation, the dummy bar is reliably held by the cantilever roller. Can be supported and transferred.

Further, the cutting means is moved in synchronism with the continuous casting piece by clamping the conveyed continuous casting piece by the clamping means, and at the same time, the cutting means is moved in a direction orthogonal to the conveying direction of the continuous casting piece. The piece can be cut. Further, in the process of cutting the continuous cast piece, by disposing the cantilever roller at a position that does not coincide with the movement locus of the cutting means, slag and the like generated along with the cutting of the continuous cast piece can be generated on the surface of the cantilever roller. Will not adhere to.

Further, for example, even when a trouble such as a cutting device causes a problem such as adhesion of slag or the like on the roller body of the cantilever roller or occurrence of cutting scratches, the roller body is configured to be attachable to and detachable from the shaft member. Therefore, it has a feature that it can be easily replaced.

[Brief description of drawings]

1 is a schematic side view of the cutting device, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a schematic front view of the device body, and FIG.
The figure is an illustration of a cantilever roller. A is the main body of the apparatus, B is a roller conveyor, C is a continuous cast piece, D is a dummy bar, 2 is a torch, 3 is a clamping means, 4 is a main body drive device, 5 is a device origin, 6 is a torch holder, and 7 and 17 are frames. , 8 is a torch drive device, 9 is a clamp lever,
10 is a drive cylinder, 11 is a pin, 13 is a wheel, 14 is a conveying roller, 15 is a cantilever roller, 15a is a roller body, 15b is a shaft member,
16 is a support roller, 18 is a roller driving device, 19 is a bearing member,
20 is a bolt, 21 is a center line, 22 is a major roller, 22b is a pulse oscillator, 23 is a conveying roller, and 24 is a pinch roller.

Claims (2)

[Claims] 1. A device main body disposed on a moving path of a continuous cast piece and a dummy bar, a clamp means provided on the apparatus main body for holding the continuous cast piece moving along the moving path, and the apparatus. Cutting means provided on the main body and capable of cutting the continuous cast piece configured to move in the moving path direction with the movement of the continuous cast piece by the clamp means and to be movable in the direction orthogonal to the moving path direction. And within the range of the moving path direction in which the cutting path drawn on the moving path from the cutting start point to the cutting end point of the continuous cast piece cut by the cutting means is formed, and from the cutting path A continuous casting cutting device, comprising: a cantilever roller for supporting a continuously cast piece or a dummy bar which is provided at a deviated position and moves along a movement path. 2. A shaft member rotatably supported by a supporting means provided on one side of the cantilever roller along a conveying direction of a continuously cast piece, and a roller member detachably mounted on the shaft member. The continuous casting and cutting device according to claim 1, which is configured.