JPH0242365Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cutting device that cuts a material to be cut, such as a continuously cast slab, and more specifically, the present invention relates to a cutting device that cuts a material to be cut, such as a continuously cast slab. This invention relates to a device for cutting steel pieces, etc., which is equipped with a device for cutting off steel pieces.

For example, continuous casting slabs are continuously cast by a continuous casting machine (hereinafter referred to as continuous casting machine), run on a conveyor roller table at the rear of the continuous caster, and are fixed by a cutting device body installed in the middle of the conveyance line. cut into pieces.

When starting continuous casting with this continuous casting machine, a means is used to extract the molten steel stored in the tundish of the continuous casting machine through a mold and then guide it between a group of pinch rolls located below the molten steel. It becomes necessary. As this means, for example, a series of chains called dummy bars is used. In other words, when the molten steel discharged from the tundish where the molten steel is stored passes through the mold and starts continuous casting, the dummy bar pulls and connects the leading edge of the molten steel, and allows the molten steel to pass between the pinch rolls. It consists of a series of chains that are pulled out onto a conveying roller table, the ends of which bite into the ends of the continuous casting slab.

If the connection between the tip of the slab and the dummy bar is not burned, the connection between the dummy bar and the slab will separate when the tip of the slab is cut, and the tip of the slab, that is, the tip crop, will be attached to the roller table by its own weight. However, in most cases, this connection is burned out, so
In many cases, this connection does not separate at the time of cutting, and the crop at the end does not fall under its own weight.

The present invention aims to improve cutting work efficiency by solving these problems.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

In this embodiment, a case where a running type cutting device is applied as the cutting device main body will be described.

The drawings all show one embodiment of the present invention, and FIG. 1 is a front view showing the main body of the cutting device, FIG. The figure shows a bummy bar cutting device which is a main part of the present invention, and is a partially enlarged view of FIG. 1.

At the base of the main body of the running type cutting device indicated by reference numeral 1 in FIG. 2, which is installed at the lower end with the cutting device main body 1 in between.
A plurality of guide wheels 5 are provided that roll in contact with the lower side of the book guide rails 4,4. The weight of the cutting device main body 1 is supported by the wheels 3.
The lower part of the cutting device main body 1 is connected to the tip of a piston rod 6a of a trunnion type cylinder 6, and by operating the cylinder 6, the cutting device main body 1 is adjusted to the traveling speed of a material to be cut 66 such as a slab. It is made to run in the running direction of the slab 66. Note that arrow A in FIG. 1 indicates the running direction of the slab 66. Of course, it also performs an operation to return it to its original position. A ram 7 is provided at the upper end of the main body 1 of the running type cutting device, and an upper tool rest 8 that is lowered by the ram 7 is provided below the ram 7 integrally with the ram 7. Further, the upper tool rest 8 is provided with an upper cutter 9 and a slab holder 10. Further, as shown in FIG. 2, a pullback cylinder 72 is attached to the upper part of the cutting device body 1, sandwiching the ram 7 therebetween, and the tip of its piston rod is connected to the upper tool rest 8. Note that hydraulic oil is supplied to the ram 7 through a supply port 67 from a hydraulic supply source (not shown).

Further, below the traveling line of the slab 66 of the cutting device main body 1, a lower cutter 11 is attached to a lower tool rest 68, which performs a cutting action in cooperation with the upper tool rest 9. The lower tool rest 68 is fixed to the cutting device main body 1. Further, the cylinder indicated by the reference numeral 73 attached to the lower part of the lower tool rest 68 is a replacement cylinder for this lower tool rest 68.

A conveyance roller table 12, which is also called a shear rear surface depressing tape, is disposed on the rear surface of the main body 1 of the running cutting device, that is, on the downstream side in the conveyance direction of the material to be cut 66 such as a slab. A plurality of rollers 13 rotated by a motor are attached to the frame 12a. The roller table 12 has a shaft 1 attached to the end of the frame 12a opposite to the cutting device main body 1.
4, the wheel 15 is rotatably supported on a shaft, and the wheel 15 is engaged on a rail 17 provided on a support base 16, and can roll on this rail 17.

One end of a link lever 18 is rotatably supported on the shaft 14, and the upper end of a rotary lever 19 is rotatably supported on the other end of the link lever 18. The center portion of the rotating lever 19 is fitted and fixed to a shaft 20, and the lower end of the rotating lever 19 is rotatably connected to a rod 21a of a trunnion type cylinder 21. The shaft 20 is rotatably supported by a bearing 69a attached to a bearing stand 69.

A tilting table 22 is rotatably supported by a shaft 24 via a bracket 23 at the end of the roller table 12 opposite to the cutting device main body 1. One feed roller 25 is rotatably attached to the tilting table 22. axis 2
4 is rotatably attached to the frame 12a of the roller table 12 via a bearing (not shown). A gear 24a is attached to the shaft 24, and an output shaft of a motor with a reduction gear (not shown) is connected to the shaft 24. on the other hand,
A gear 25a is attached to the shaft of the roller 25. The gear 25a and the gear 24a are connected by two intermediate gears 25b rotatably attached to the tilting table 22, and the roller 25 is configured to be rotated by the motor.

Fixed rollers 26 are arranged downstream of this roller 25 in the conveying direction.

On the other hand, one end of a rotating arm 27 is fixed to the shaft 20, and its tip and the tilting table 22 are connected by a turnbuckle 28 whose length can be adjusted.

On the other hand, a trunnion type cylinder 29 is attached below the roller table 12, and the lower end of a pivot lever 30 formed in a dogleg shape is rotatably attached to the tip of the rod 29a via an intermediate lever 70. connected. The rotating lever 30 is connected to a support base 32 via a shaft 31 attached to its bent portion.
It is rotatably supported on a shaft, and a wheel 33 is rotatably attached to its tip. This wheel 33 is the frame 12a of the transport roller table 12.
It engages with a guide plate 34 provided on the lower surface and at a position slightly closer to the cutting device main body 1 side. Therefore, the roller table 12 has both ends in the longitudinal direction, respectively.
Supports 16 and 3 via wheels 15 and 33
It is supported by 2. And cylinder 29
When the piston rod 29a is moved backward, the roller table 12 is rotated clockwise in FIG. 1 about the shaft 14. Further, when the piston rod 21a of the cylinder 21 is moved backward, the tilting table 22 is rotated counterclockwise in FIG.
is moved in the transport direction.

On the other hand, another tilting table 35 is rotatably supported on the end of the roller table 12 on the side of the cutting device main body 1 via a shaft 13b.
is rotatably supported. This roller 36 is rotationally driven by the rotational force of the roller 13a of the roller table 12 closest to the cutting device main body 1 via an intermediate gear group 37.

A clevis-type cylinder 38 is attached to the lower part of the frame 12a of the roller table 12, and the tip of the rod 38a is rotatably connected to the lower end of the tilting table 36 via a shaft 39.

On the other hand, a shear front depressing table 40 is provided on the front side of the cutting device main body 1. A roller 42 is rotatably supported on this depressing table 40.

Note that the upper ends of the roller 36 of the tilting table 35 and the rollers 13, 13a of the roller table 12 are also at the same level as the upper end of the roller 42 when not cutting, and are slightly above the upper surface of the lower cutter 11. It is located in

A rear end crop extrusion device 44 is provided above the depressing table 40 and on the side of the cutting device main body 1.

A pedestal 5 is mounted on the frame 12a of the transport roller table 12 at a position closer to the cutting device main body 1.
8 is provided, and this pedestal 58 is provided with a dummy bar separating device 59 according to the present invention.

The dummy bar 50 connects the leading edge of the molten copper by pulling it between the pinch rolls 71 when the molten steel discharged from the tundish in which the molten steel is stored passes through the mold and starts continuous casting. It consists of a series of chains 51 for passing through and pulling out onto the conveying roller table 12 as shown in FIG. 3, the tip of which bites into the tip of the continuous casting slab. If the connecting portion 52 between the tip of the slab 66 and the dummy bar 50 is not baked, the connecting portion 52 between the dummy bar 50 and the slab 66 will separate at the same time as the tip of the slab is cut, and the tip of the slab, that is, the tip crop. 66a
falls downward under its own weight, but in most cases,
Since this connection part 52 is sewn, the tip crop 6 does not separate at the same time as this connection part 52 is cut.
6a often does not fall due to its own weight. Therefore,
In this case, the dummy bar separating device 59 separates the connecting portion 52 between the dummy bar 50 and the tip end of the slab, that is, the tip crop 66a.

The dummy bar separating device 59 will be explained in detail based on FIGS. 1 and 2.

A base 53 is provided on the pedestal 58, and brackets 54, 55 are provided on the sides of the base 53, spaced apart from each other.
is installed protrudingly. These brackets 54,5
5 has two upper and lower parallel links 60, 6, respectively.
1 is rotatably supported at one end by a pin 56, and the other end of the parallel links 60, 61 are arranged perpendicularly to the conveyance roller table 12, and the conveyance roller table 12 is It is rotatably connected to the upper part of a rod 62 that extends toward the surface. In this way, the base 53, links 60, 6
1 and rod 62 form a parallelogram linkage. The end of the upper link 60 on the base 53 side is rotatably connected to the lower end of the piston rod 63a of the trunnion type cylinder 63. Therefore, by operating the cylinder 63 and retracting the piston rod 63a from the illustrated state, the links 60 and 61 are rotated to the position shown in FIG.
The rod 62 is lowered as shown by the dotted chain line, and the lower end of the rod 62 collides with the slab 66 near the connection part 52 between the dummy bar 50 and the slab 66, knocking off the tip crop 66a from the tip of the dummy bar 50. Links 60, 61 allow rod 62 to act perpendicularly to slab 66 on roller table 12.

By the way, a crop chute 64 is provided below the cutting device main body 1 at a position facing the upper cutter 9, the upper end thereof faces the upper cutter 9, and the lower end serves to transport the crop to another location. It faces above the crop cart 65 provided for this purpose.

Next, the operation of the cutting device configured as above will be explained.

Before starting cutting, all devices are in the state shown by solid lines in FIG.

That is, the center of the main body 1 of the running cutting device 1 is located at the line S1 in FIG. 1, and the rod 62 of the dummy bar cutting device 59 is also at its upper limit. The conveyance roller table 12 is located close to the cutting device main body 1 side and maintains a horizontal state, and the tilting table 22 on the rear end side and the tilting table 35 on the front end side are also in a horizontal state and are not tilted. The table 35 is located near the lower blade 11 inside the cutting device main body 1.

In this state, the tip of the slab 66, on which continuous casting is started using the dummy bar 50, is guided to the cutting device at a predetermined traveling speed. When the cutting device body 1 reaches the cutting position, the tip end crop 66a is first cut.

That is, when the tip crop 66a reaches the cutting position, first, the cylinder 38 for the tilting table 35 is operated, and the piston rod 38a is activated.
is moved backward, the tilting table 35 is rotated from a horizontal state in the time direction in FIG. 1, and is lowered to be in the state shown by the two-dot chain line in FIG. As a result, the cutting device main body 1 can be moved in the conveying direction of the slab 66, and the upper cutter 9 can be lowered to start cutting the slab 66.

In parallel with the start of downward rotation of the tilting table 35, the running cylinder 6 of the cutting device main body 1 and the ram 7 for driving the upper blade 9 are operated to start cutting the end crop 66a of the slab 66 between runs. That is, the traveling cylinder 6 is operated in synchronization with the traveling speed of the slab 66 to move the cutting device main body 1 in the traveling direction of the slab 66. The running speed of the cutting device 1 is controlled by, for example, detecting the rotation speed of the pinch roll 71 of the continuous casting machine with a pulse counter (not shown), and controlling the operating speed of the running cylinder 6 based on this detection signal. It can be done. Furthermore, when hydraulic oil is supplied to the ram 7 from the hydraulic oil supply port 67, the ram 7 descends. Therefore, the upper cutter 9 moves down toward the slab 66 together with the upper tool post 8 . Note that before the upper cutter 9 descends and reaches the upper surface of the slab 66, a cylinder (not shown) for the slab holder 10 is activated to press the slab holder 1.
0 is brought into contact with the upper surface of the slab 66, and then the slab 6
6 is pressed and held between it and the lower tool rest 68. Then, the upper cutter 9 reaches the upper surface of the slab 66 and descends, and the lower cutter 11 on the fixed side cuts the slab 66.
disconnection will begin. Simultaneously with the start of cutting, the cylinder 29 is actuated to retract the piston rod 29a toward the cylinder 29. Then, the rotating lever 30 is rotated clockwise in FIG.
A roller 33 attached to the tip of the rotating lever 30
is lowered, and the cutting device main body 1 side of the conveying roller table 12 rotates downward from the horizontal position about the shaft 14. Note that this rotation of the conveyance roller table 12 is performed in synchronization with the lowering speed of the upper cutter 9.

In this way, the tip end crop 66a is placed on and supported by the rollers 13a, 13 of the roller table 12, and is sent rearward to the transport roller table 12 in synchronization with the lowering movement of the upper cutter 9. It is cut while descending. In this way, the tip crop 66a is cut. At the same time as the cutting, the tip crop 66a should separate from the dummy bar 50 and fall downward under its own weight. Since the connecting surface 52 is sewn, the crop 66a will not fall downward at the same time as cutting. Therefore, in this case, the dummy bar separating device 59 is operated to forcibly separate the tip end crop 66a from the dummy bar 50. That is, the connection portion 52 of the cut end crop 66a with the dummy bar 50
When the rod 62 of the dummy bar disconnection device 59 approaches, the cylinder 63 is actuated to move the piston rod 63a backward, thereby rotating the links 60 and 61 clockwise in FIG. 3, and lowering the rod 62. The lower end of the rod 62 is caused to collide with the tip crop 66a, knocking off the cut tip crop 66a, and disconnecting the connection portion 52 from the dummy bar 50. The separated tip crop 66a is attached to the roller 1 of the conveying roller table 12.
3 and 13a and fall downward, and 2 is shown in Figure 1.
As shown by the dotted chain line, it falls onto a chute 64 that has moved below the cutting device 59, and slides over this chute 64 to be stored on a cropping cart 65. When the end crop 66a is cut in this manner, the rod 62 of the dummy bar cutting device 59 rises again, and is in a standby state at its rising limit.

As soon as the cutting of the tip crop 66a is completed, the cylinder 6 for the cutting device main body 1 is activated, and the cutting device main body 1 returns to the original position S1, and the pullback cylinder 72 is activated, and the upper blade 9 is moved to the upper blade. The table 8, the slab presser 10, and the ram 7 are lifted up, and the tilting table 35 is also returned to a horizontal state by the cylinder 38. Further, the rotation lever 30 is rotated counterclockwise in FIG. 1 by the cylinder 29, and the roller table 12 returns to the horizontal state. In this way, each device returns to its state before the start of cutting.

Even after the end crop 66a has been cut in this way, the continuous casting slab 66 continues to run at a predetermined running speed between the conveyor rollers 42 and 42.
6, 13a, and 13. and,
The continuous cast slab 66 travels a predetermined length in the space between the upper cutter 9 and the lower cutter 11, and when it is time to cut the continuous cast slab 66 to a predetermined length, a cutting start detection means (not shown) cuts the continuous cast slab 66 to a predetermined length. , the lowering operation of the tilting table 35, the lowering operation of the ram 7, the lowering operation of the slab presser 10, the operation of the traveling cylinder 6, and the rotating operation of the roller table 12, in exactly the same manner as in the case of cutting the tip end crop 66a. is started according to the operation timing set in advance in the sequence. That is, the slab 66 from which the tip crop 66a has been cut and removed is placed on the rollers 13a and 13 of the roller table 12, and is supported and sent rearward in synchronization with the lowering movement of the upper cutter 9. Then, it is cut into a predetermined length while descending together with the conveyance roller table 12. Therefore, smooth cutting can be performed without deforming the slab 66, which is in a softened state at high temperatures.

As described above, since the cutting device of the present invention for cutting materials such as steel slabs has the structure described in the claims of the utility model registration, for example, it is possible to connect a material to be cut such as a continuous cast slab with a dummy bar. Even if the part is sewn, the workpiece can be reliably and easily separated from the dummy bar by applying a rod that separates the workpiece from the dummy bar to the workpiece at the start of the cutting operation. Therefore, it is possible to smoothly proceed to the subsequent cutting of the material to be cut to a fixed size, thereby significantly improving the efficiency of the cutting operation. In particular, in the present invention, since the main body of the cutting device is a running type, it is possible to reliably take advantage of the high work efficiency of cutting the material to be cut one after another into a predetermined length. The cutting device body side of the conveying roller table on the rear side rotates and descends with the cutting operation, and the dummy bar separating device is attached to this roller table, so the roller table is not cut. Since the main body of the device descends together with the dummy bar separating device and the dummy bar can be separated immediately after the cutting operation is completed, the connection between the dummy bar and the material being cut passes past the installation position of the dummy bar separating device. Since the connecting portion can be hit with the rod of the dummy bar cutting device beforehand, the dummy bar and the material to be cut can be reliably separated.

As described above, according to the present invention, the high cutting efficiency of the running cutting device can be further ensured, and it is possible to obtain a cutting device for cutting steel slabs, etc., which has extremely high working efficiency.

[Brief explanation of drawings]

The drawings all show one embodiment of the present invention; Fig. 1 is a front view showing the entire cutting device, Fig. 2 is a view taken along the line from Fig. 1, and Fig. 3 is a main part of the invention. FIG. DESCRIPTION OF SYMBOLS 1... Cutting device main body, 12... Conveyance roller table, 50... Dummy bar, 52... Connection portion between dummy bar and continuous casting slab, 53... Base, 59...
Dummy bar separation device, 60, 61... link, 6
2... Rod, 66... Continuously cast slab, 66a...
Tip crop.

Claims (1)

[Scope of utility model registration request] This is a running type cutting device in which the main body of the cutting device cuts the steel piece in synchronization with the conveyance of the material to be cut, such as a steel piece, and on the rear side, the cutting device main body side is synchronized with the descending cutting operation of the upper blade of the cutting device. This is a cutting device for steel pieces, etc., which is equipped with a roller table for conveying the material to be cut, which is rotated and lowered.A base is attached to the conveyance roller table, and each end is rotated on this base. Several links are disposed parallel to each other and are pivoted so that they can move freely, and the other ends of these links are rotatably connected by a rod that extends toward the conveying roller table surface, so that the rod can be moved up and down. The lower end of the rod is attached to the workpiece near the connection point between the workpiece and the dummy bar, which is installed to move up and down in the direction of the workpiece and is connected to the tip of the workpiece being conveyed on the conveying roller table, guiding the workpiece. A device for cutting steel pieces, etc. that can break the connection between the dummy bar and the material to be cut by colliding with the dummy bar.