JPS637883B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cutting device for steel slabs such as continuous cast slabs, and more specifically, the present invention relates to a cutting device for cutting steel slabs such as continuous cast slabs, and more specifically, it cuts cutting burrs such as burrs that occur at the cut end of the steel slab when cutting the steel slab with a knife. This invention relates to a steel billet cutting device that prevents the occurrence of hair loss on the surface of the billet.

Conventionally, various methods and devices have been proposed for cutting continuously cast steel pieces provided at the rear of a continuous casting apparatus.

In many of these methods, upper and lower cutters apply shearing force to the continuously cast steel pieces to cut them. The upper and lower blades used for this cutting have a structure as shown in FIG. 1, for example.

In Fig. 1, the upper blade indicated by reference numeral 1 is fixed, and the lower blade indicated by reference numeral 2 is movable up and down.They are parallel to each other so that they can pass each other in order to apply shearing force to the continuously cast steel slab 3. It is located.

However, using such a cutter, continuous cast steel slab 3
When the continuous cast steel slab 3 is cut, as shown in FIG. 2, cutting burrs 3a such as burrs are inevitably generated near the upper and lower surfaces of the cut ends of the continuously cast steel slab 3 over substantially the entire width of the steel slab 3. If the continuous cast steel billet 3 is fed between the rolling rollers 4 and 5 in the next rolling process with such cutting burrs 3a still formed, the cut burrs 3a will definitely be folded back onto the surface of the continuous cast steel billet 3 and rolled. I end up. The folded and rolled cutting burr 3a is stretched thinly, and as shown in FIG. 3, a heave flaw 6a is formed on the surface of the cut end side of the steel strip 6, which extends in the shape of a mountain in the longitudinal direction. is formed. For example, the length L over which this scab 6a exists is at most 10 mm for a steel strip with a thickness of 2 mm.
It reaches up to m.

The portion where the sludge 6a has occurred must be cut and removed after rolling and cannot be used as a product, resulting in a significant decrease in yield.

The present invention was made in view of the above-mentioned circumstances, and provides a cutting device for continuous cast steel billets that prevents cutting burrs from forming near the surface of the steel billet, which causes sludge defects during rolling. The purpose is to

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

FIG. 4 explains one embodiment of the cutting device of the present invention. In the figure, reference numerals 10 and 10 indicate a housing of the main body of the cutting device, the upper and lower ends of which are connected by separators 11 and 12. ing.

Inside the housing 10, three movable platens, a top platen 13, an upper blade platen 14, and a lower blade platen 15, are provided in order from the top so as to be movable up and down along guides 16, 16. The top platen 13 and the lower blade platen 15 are integrally connected by a tie rod 17 which is a connecting member. The tie rod 17 is slidably provided through the upper blade platen 14.

Separator 11 of the cutting device main body located at the upper end
is provided with a plurality of cylinders 18 for level adjustment, and the tip of the piston rod 18a is connected to the top platen 13. A cutting cylinder is provided between the top platen 13 and the upper blade platen 14. That is, the top platen 13 also includes a cutting ram 19, the lower end of which is connected to the upper blade platen 14.

In addition, the top platen 13 and the upper blade platen 14
A predetermined number of pullback cylinders 20 are provided between the two.

On the other hand, the upper blade platen 14 and the lower blade platen 15
gear cylinders 21 and 22 are provided respectively, and support rolls 21a and 22a are rotatably provided at the tips of the piston rods of these cylinders, respectively. These support rolls 21
Continuously cast steel piece 23 which is the material to be cut by a and 22a
is supported on the pass line. As shown in FIG. 6, the lower support roll 22a on the rear side is movably attached to the main body of the cutting device by a cylinder 36 from diagonally below and by a coupling device 37 such as a turnbuckle from diagonally above. When dropping the crop downward, by retracting the piston rod of the cylinder 36, the support roll 22a is allowed to escape to the rear side.

By the way, the upper blade platen 14 and the lower blade platen 1
5 is provided with an upper blade 24 and a lower blade 25 at opposing positions with a continuously cast steel piece 23 in between.

The upper blade 24 and the lower blade 25 are shown in FIGS. 5 and 6.
The structure and arrangement shown in the figure are adopted.
That is, the upper blade 24 and the lower blade 25 have sharp cutting edges 24a and 25a, respectively, and these blades and the cutting edges are arranged in vertically symmetrical positions with the continuously cast steel slab 23 in between.

On the other hand, as shown in FIGS. 4 and 6, a plurality of wheels 26 are rotatably provided on both sides of the housing 10, and each wheel is attached to a rail 27.
It is in contact with the top so that it can run freely. Also, housing 1
A wheel 39 is also provided at the lower end of the cutting device 0 and rolls in contact with the lower side of the guide rail 38 to prevent the cutting device main body from falling over.

As shown in FIG. 6, the housing 10 includes a piston rod 28a of the traveling cylinder 28.
are connected to each other, and the main body of the cutting device is connected to the continuously cast steel slab 23.
It is configured to move forward in synchronization with the conveyance speed of and return to its original position.

A support frame 29 is disposed on the opposite side of the cutting device main body from the traveling cylinder 28 along the pass line of the continuous cast steel slabs 23, and the continuous cast steel slabs 23 are placed on this support frame 29 at predetermined intervals. A conveyance roller 30 is provided.

A tilting table 31 is rotatably supported by a shaft 32 at the end of the support frame 29 on the cutting device main body side. This tilting table 31 is provided with one conveyance roller 33.

This tilting table 31 is rotatably connected to the tip of a piston rod 34a of a cylinder 34 attached to the support frame 29 side.

Therefore, by operating the cylinder 34 and retracting the piston rod 34a, the tilting table 31 can be rotated from the horizontal position shown by the solid line in FIG. 6 to the downward position shown by the two-dot chain line. Can be done.

Further, the reference numeral 40 in FIG. 6 is a pinch roll at the end of the continuous casting equipment, and the reference numeral 41 is a conveyance roller located in front of the cutting device.

Next, the operation of the present invention configured as above will be explained.

First, operate the level adjustment cylinder 18,
Move the top platen 13 up and down. When the top platen 13 moves up and down, the lower blade platen 15 connected by the tie rod 17 moves up and down, and the lower blade 25
goes up and down. By such an operation, the lower blade 25 is set at a position a predetermined distance away from the continuously cast steel piece 23.

On the other hand, the pullback cylinder 20 is operated and adjusted so that the upper blade 24 of the upper blade platen 14 is vertically symmetrical to the lower blade 25 with the continuously cast steel piece 23 in between. Such positioning of the lower blade platen 15 and the upper blade platen 14 only needs to be preset once before operation. This positioning may be controlled, for example, by providing position detectors such as limit switches between the lower blade platen 15 and the main body, and between the upper blade platen 14 and the main body, respectively.
Alternatively, this may be done by controlling the hydraulic system or providing a mechanical stopper whose position is adjustable.

In this way, the upper blade 24 and the lower blade 25 are set in vertically symmetrical positions with the continuously cast steel piece 23 in between, and the cylinder 34 is operated to advance its piston rod 34a, thereby moving the tilting table 31 horizontally. condition and match the pass line of the continuously cast steel billet 23. In addition, the gear cylinders 22, 36
is activated to raise the support roll 22a and align it with the pass line of the continuously cast steel billet 23. With this support roll 22a, the continuously cast steel piece 2 is
3 can be supported, the distance between the conveying rollers can be shortened, and deformation of the continuously cast steel slab 23, which is easily deformed at high temperatures, can be prevented.

After each device is brought into the above state, the continuously cast steel billet 23 is introduced into the cutting device.

Generally, the continuously cast steel billet that is first introduced from continuous casting equipment has an irregularly shaped tip called a crop, which cannot be used as a product. Therefore, first of all, this crop is cut and removed. That is, the tip of the crop is guided into the cutting device, and the cutting position is the upper and lower blades 24,
25, the traveling cylinder 2 of the cutting device
8, the piston rod 28a is advanced, and the main body of the cutting device is advanced in synchronization with the conveying speed of the continuously cast steel billet 23. Immediately after that, the gear cylinder 21 is operated to lower the upper support roll 21a, and the continuously cast steel slab 23 is clamped with equal force between it and the lower support roll 22a. The state of each device at this time is shown in FIGS. 4 and 6.

At the same time, the cutting ram 19 and the level adjustment cylinder 18 are operated to start the cutting operation, and the operation procedure at this time is as follows. That is, the upper blade platen 1 is
Hydraulic pressure as a cutting force is applied to the head chamber 19a of the ram 19 so that the ram 4 descends at a speed of v. At the same time, the top platen 13 and the lower blade platen 1
5 operates hydraulic pressure on the rod side of the level adjustment cylinder 18 so that the level adjustment cylinder 18 rises at a speed of v/2.
Then, the upper blade platen 14 is v−v/2=
It will descend at a speed of v/2. That is,
The upper blade 24 and the lower blade 25 descend and rise, respectively, at the same speed v/2, thereby digging into the continuous cast steel piece 23 and cutting the continuous cast steel piece 23. That is, in this case, the upper blade 24 and the lower blade 25 maintain vertically symmetrical positions with the continuously cast billet 23 as the center, and the upper blade 24 and the lower knife 25 touch the continuous cast billet 23 at the same speed and by the same amount. As it sinks in, continuously cast steel slab 2
3 is not pushed down or pushed up by the upper blade 24 or the lower blade 25, and the cutting action is reliably performed.

Even if there is a temperature difference between the upper and lower surfaces of the continuous cast steel billet 23, if the continuous cast steel billet 23 is held evenly from both the top and bottom by the support rolls 21a and 22a on both sides of the part to be cut during cutting. Continuously cast slab 2
3 does not move in the vertical direction. Continuously cast steel billet 2
If there is a temperature difference between the upper and lower surfaces of 3, for example, the upper surface side is higher in temperature than the lower surface side, the cutting resistance of the cutter will be greater on the lower surface side, and the continuously cast steel billet 23 will be pushed upward and become free. However, this can be prevented.

In this way, the continuous cast steel piece 23 is cut, but the continuous cast steel piece 23 is cut by the upper and lower blades 24 and 25 at a position where the cutting edges 24a and 25a of the upper and lower cutters 24 and 25 do not come into contact with each other. finish.

That is, the cutting edges 24 of the upper and lower cutters 24, 25
When a and 25a reach the vicinity of the center of the thickness of the continuous cast steel slab 23, the continuous cast steel slab 23 is cut by the left and right slopes of the upper and lower cutters 24 and 25, which have triangular cross sections, as shown in Fig. 5a. The blades 24 and 25 are held in between and pushed so as to be separated horizontally to the left and right.
Therefore, the cutting edges 24a, 2 of the upper and lower cutters 24, 25
When 5a reaches the vicinity of the center of the continuous cast steel slab 23, the continuous cast steel slab 23 is easily broken near the center of its plate thickness due to this wedge action and separated. For this reason, the cutting edges 24a and 2 of the upper and lower cutters 24, 25
5a bites into the continuously cast billet 23, reaches near the center of the plate thickness of the continuous cast billet 23, and at the point when the center of the plate thickness of the continuous cast billet 23 is broken, the upper blade 24 and the lower blade 25 move downward and upward, respectively. If the operation is completed, the cutting edges 24a and 25a will not collide with each other.

When this cutting is completed, the shape of the cut portion of the continuously cast steel piece 23 is as shown in FIG. 5b, and a slight burr 3b is generated at the tip of the tapered part at the center of the plate thickness, that is, at the fractured part.

As described above, before starting the movement of the cutting device main body, the cylinder 34 is activated to move the tilting table 31 to the position shown by the two-dot chain line in FIG. Make sure that it does not become

When the cutting of the crop is completed in this way, the hydraulic cylinder 36 is operated to move the lower support roll 22a on the rear side backward, and the cut crop is dropped onto the chute 35 and placed on the crop cart (not shown). and collect it.

After the crops have been cut and removed in this manner, the traveling cylinder 28 is activated and the cutting device body begins to retreat to its original position. At the same time, the upper gear cylinder 21 operates, and the upper support roll 21a
is raised, and the cylinder 34 is activated to return the tilting table 31 to the horizontal state, and further,
The cylinder 36 operates, and the lower support roll 22a on the rear side also returns to its original position, supporting the continuously cast steel piece 23 being conveyed. And top platen 13
Oil is supplied to the rod side of the pullback cylinder 20 so that the upper blade platen 14 rises at a speed of V, and at the same time, the top platen 13 and the lower blade platen 15 descend at a speed of V/2. Oil is supplied to the head side of the level adjustment cylinder 18. As a result, the upper blade platen 14 is V-V/
2 = V/2, so the upper blade platen 14 and the lower blade platen 15 rise and fall at the same speed, respectively, and the upper blade 24 and the lower blade 25
Hold it in place and hold it in a vertically symmetrical position.

Even while the cutting device is returning to the state before the start of cutting, the continuously cast steel billet 23 is being conveyed continuously, passing between the upper and lower blades 24 and 25, and tilting the rear surface. At this time, the two lower support rolls 22a and the tilting table 31 in the cutting device are in a horizontal position on the pass line of the continuously cast billet 23, and the continuously cast billet 23 is guided toward the table 31. Since the continuously cast steel pieces 23 are supported and transported, the continuously cast steel pieces 23, which are easily deformed at high temperatures, are not bent or deformed downward.

Eventually, the continuous cast steel piece 23 is conveyed a predetermined distance and when it reaches the cutting position, cutting of the continuous cast steel piece 23 to a fixed size is started. That is, the travel cylinder 28 operates in the same way as the operation procedure when cutting the crop described above.
The main body of the cutting device starts moving forward in synchronization with the conveying speed of the continuously cast steel billet 23. At the same time, the cylinder 34 is activated and the tilting table 31 is lowered. Then, the upper gear cylinder 21 is operated, and the upper support roll 21a is brought into contact with the surface of the continuously cast steel slab 23, and the continuously cast steel slab 23 is moved between the upper support roll 21a and the lower support roll 22a.
is held with equal force from above and below. Subsequently, the ram 19 and the level adjustment cylinder 18 are operated in the same manner as described above, and the upper and lower cutters 24 and 25 penetrate the continuous cast steel billet 23 by the same amount at the same speed to cut the continuous cast steel billet 23. .

At the same time as the cutting is completed, the traveling cylinder 28 is activated and the main body of the cutting device begins to return to its original position, and the upper gear cylinder 21 is activated to move the upper support roll 21a in the same manner as when the crop cutting is completed. Rise. Further, the pullback cylinder 20 and the level adjustment cylinder 18 operate in the same manner as described above, and the upper and lower blades 24, 25 are separated and returned to their original positions. Then, the tilting table 31 returns to the horizontal position. However, when cutting the continuously cast steel billet 23 to a fixed size, it is not necessary to move the lower support roll 22a on the rear side backward as after the cutting of the crop is completed.

Thereafter, by repeating the same operation, the continuously cast steel slab 23
is cut to size. The continuously cast steel pieces 23 cut to size in this manner are transported to a rolling process.

At the cut end of the continuously cast steel slab 23 cut in this way, there is no cutting burr directed toward the outer surface of the steel slab 23 as in the conventional method, and as shown in FIG. Since it only slightly occurs at the tip of the tapered part, even if this is rolled with a rolling roll, the distance at which the bald scratch 6a occurs as shown in FIG. 7B is
L ₁ is extremely small, and the product yield is significantly improved.

FIG. 9 explains another embodiment of the cutting device according to the present invention. In FIG. 9, the same or corresponding parts as in FIG. 4 are given the same reference numerals, and their explanation will be omitted.

In this embodiment, the level adjustment cylinder 1
The piston rod 18a of No. 8 is connected to the top platen 1.
3, and is connected to the upper blade platen 14, and the other parts are completely the same as the embodiment shown in FIG.

The operation during cutting in this case is as follows. That is, the ram 1 is moved so that the top platen 13 rises with respect to the upper blade platen 14 at a speed of v.
Hydraulic pressure as a cutting force is applied to the head chamber 19a of No. 9, and at the same time, hydraulic pressure is applied to the head side of the level adjustment cylinder 18 so that the upper blade platen 14 descends at a speed of v/2. As a result, the lower blade platen 15 rises at a speed of v/2, so the upper blade 24
The lower blade 25 and the lower blade 25 penetrate and cut the continuously cast steel piece 23 at the same speed v/2.

In addition, in the embodiments of FIGS. 4 and 9 described above, the continuously cast steel slabs 2 have different thicknesses.
Even when attempting to cut the upper blade 24, the upper blade 24 can be cut by operating the level adjustment cylinder 18.
and the lower blade 25 can be set and adjusted to vertically symmetrical positions with respect to the continuously cast steel piece 23 very quickly and easily.

In addition, the upper and lower cutlery 2 shown in the above-mentioned embodiment
4 and 25 are illustrated as having a triangular cross-sectional shape at the tip, but this is not necessarily limited to this, and various cross-sectional shapes that are vertically symmetrical as shown in FIGS. 8A to 8F are shown. can also be adopted.

Further, in each of the embodiments described above, the level adjustment cylinder 18 is attached to the upper separator 11, but it may be attached to the lower separator 12 or to the housing 10, and the piston rod 18a is attached to the upper separator 11. Top platen 13,
A structure in which the blade is connected to either one of the upper blade platen 14 and the lower blade platen 15 may be adopted.

In the embodiment described above, the top platen 13, the upper blade platen 14, and the lower blade platen 15 are arranged in order from above as three movable platens relative to the main body of the cutting device, and the ram 19 as a cutting cylinder is arranged so as to be movable up and down. is provided between the top platen 13 and the upper blade platen 14, and the top platen 13 and the lower blade platen 15 are integrally connected by a tie rod 17. 11, 12, etc., and turn the three internal platens arranged as described above completely upside down, and insert the lower blade platen 1 in FIG.
5. Upper blade platen 14 and top platen 13
These platens are, in order from the top, an upper blade platen, a lower blade platen, and a bottom platen, and these platens are movable up and down, and the upper blade and the lower blade are respectively placed on the upper blade platen and the lower blade platen, and face each other with the continuously cast steel piece in between. Installation, the ram is built into the bottom platen,
This ram and the lower blade platen are connected, and the upper blade platen and the bottom platen are connected as one body by a tie rod, and the level adjustment cylinder 18 is also turned upside down, and the bottom platen and the lower separator of the cutting device main body are connected. It may be provided between 12 and 12. In this case, the principle of cutting the steel piece is exactly the same as the embodiment shown in FIG. Note that the level adjustment cylinder may be provided between the cutting device main body and either the upper blade platen or the lower blade platen.

Furthermore, in the above explanation, a case is shown in which a cutting ram is built into the top platen 13 or the bottom platen as a cutting cylinder, and this ram is connected to the upper blade platen 14 or the lower blade platen, respectively. As a cutting cylinder between the top platen 13 and the upper blade platen 14 or between the lower blade platen and the bottom platen,
An independent cylinder may be provided, for example, the cylinder body may be attached to the top platen 13 and the piston rod may be connected to the upper blade platen 14. The same can be said of the installation procedure for the level adjustment cylinder 18.

Further, in the above embodiment, the so-called running cutting method is employed, in which the main body of the cutting device is moved forward in synchronization with the transport speed of the continuously cast steel billet 23 to cut it, but the present invention is of course applicable to the steel billet 23. The present invention can also be applied to a fixed cutting device that cuts by stopping 23.

As described in the explanation of the operation of the present invention, when the steel piece 23 is being cut by the upper and lower cutters 24 and 25 as shown in FIG.
4 and 25 are pushed horizontally to the left and right,
Steel piece 2 on the upstream side (front side) of the cutlery 24, 25
3 is continuous and is being conveyed at a predetermined speed, this upstream steel piece 23 is pushed back. Therefore, in order to avoid applying such a pushing back force to the steel billet 23, during cutting, the traveling speed of the cutting device body is made faster than the transport speed of the steel billet 23 by the pushing back speed. , it is necessary to cut between runs.

By the way, when the present invention is applied, as described above, only a slight cutting burr is generated near the center of the cut end in the thickness direction, so that the sagging flaw 6a after rolling is prevented.
However, since the cutting edge is preformed into a tapered shape at the same time as cutting, the amount of cropping at the edge after rolling is also reduced. When the steel piece 23 cut perpendicularly to the longitudinal direction is rolled using the machine shown in FIG. 7A, a fishtail 6b and an irregular tip portion 6c are obtained as shown in FIG. 7B.
Crops like these still occur at each longitudinal end of the product. That is, to give an example, as shown in FIG. 7B, the rear end fishtail portion 6b is recessed with respect to the rolling direction (in the direction of the arrow in the figure), and the tip irregularly shaped portion 6c has a rounded and pointed shape. This part is a defective shape part of the product and will not become a product.

Therefore, in order to eliminate such inconveniences, it is preferable to use upper and lower cutters 24 and 25 as shown in FIG. 10 or 11. That is, the shape of the cut portion after cutting is the same as that of the leading end crop 6c and the trailing end crop 6 after rolling as described above.
The upper and lower blades 24 are oriented in the opposite direction to the shape of b.
25 may be curved or bent.

By employing the cutters 24 and 25 having such a shape, the cut ends can be made substantially straight after rolling, and the amount of cropping can be further reduced.

In the above embodiments, the case where a continuous cast steel piece such as a continuous cast slab was cut as the material to be cut was explained, but the present invention is not limited to this, and it may be used to cut a continuous cast steel piece such as a regular steel plate. Of course, it can also be applied.

As is clear from the above description, since the present invention is configured as described in the claims, it has the following excellent effects.

(1) It is possible to cut steel pieces such as continuously cast steel pieces and steel plates by inserting the upper and lower blades into the steel pieces by the same amount at the same speed, so the movement of the steel pieces during cutting is minimized. It is possible to avoid the phenomenon of the steel billet being pushed up or pushed down, and to reliably cut the steel billet without deformation of the steel billet itself or impact effects caused by the steel billet falling onto the conveying roller table. Can be done.

(2) As a result of the above, the pass line of the steel billet can always be kept constant even during cutting, and it is possible to keep the pass line of the steel billet constant even during cutting. This eliminates the need for corresponding equipment associated with vertical movement of the device, simplifying the device. Furthermore, if both sides of the part to be cut of the steel piece are held with equal force between the upper and lower rolls, etc., even if there is resistance to the cutting tool due to temperature differences between the upper and lower surfaces of the steel piece, It is possible to prevent vertical movement of the steel piece during cutting.

(3) Even when the thickness of the steel pieces to be cut differs, the upper and lower blades can be set and adjusted to vertically symmetrical positions with respect to the steel pieces very quickly and easily using the level adjustment cylinder.

(4) When the two lower movable platens are used as a lower blade platen and a bottom platen, and a cutting cylinder such as a ram is installed between these two platens, the center of gravity of the cutting device is affected by the large size of the cutting cylinder. Located at the bottom, the stability of the cutting device is increased and reliable cutting operation can be achieved.

(5) Unlike conventional methods, cutting burrs do not occur near the top and bottom surfaces of the cut end of the steel piece. Therefore, the amount of sagging defects that occur during rolling can be greatly reduced,
Product yield can be significantly improved.

(6) Since the cross-sectional shape of the cut end in the plate thickness direction has a protruding tapered shape, it is easy to get caught in the rolling roll during rolling. Further, when the cut steel pieces are transported by a roller table, the rollers are not easily bumped.

(7) Since the leading and trailing ends of the steel billet are preformed into a tapered shape at the same time as cutting, the amount of cropping at the leading and trailing ends of the rolled material is reduced after rolling, and the yield is improved.

(8) When cutting a slab of steel where the central part of the slab cross section is unsolidified, there is a possibility that the unsolidified part will break out using conventional gas cutting or cutting equipment that uses parallel blades that move up and down in parallel. If the cutting device according to the present invention is employed, the unsolidified portion of the cut end will be wrapped in the solidified surface structure of the steel piece, making it possible to prevent breakout.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing the conventional cutting method, Fig. 2 is an explanatory diagram showing the state of occurrence of cutting burrs when cutting by the conventional cutting method, and Fig. 3 is a diagram showing the steel piece cut by the conventional cutting method. FIG. 4 is a front view illustrating an embodiment of the present invention, and FIGS. 5a and 5b are an example of a cutting state according to the present invention. A diagram illustrating an example of the shape of the cut end after cutting, FIG.
7A is a perspective view showing an embodiment of the cutter of the present invention, FIG. 7B is a diagram illustrating the state of occurrence of scab marks when cutting according to the present invention, and FIG. 8A is a side view of the figure.
-F are views showing other embodiments of the upper and lower cutters according to the present invention, FIG. 9 is a front view showing another embodiment of the present invention, and FIGS. 10 and 11 are modifications of the upper and lower cutters of the present invention. It is a perspective view explaining an example. 1, 24... Upper blade, 2, 25... Lower blade, 24
a, 25a... cutting edge, 3, 23... steel piece, 6a...
...Scattered scratches, 10...Housing, 11, 12...
Separator, 13...Top platen, 14...
Upper blade platen, 15...Lower blade platen, 17...
Connecting member (tie rod), 18... Level adjustment cylinder, 19... Ram, 19a... Ram head chamber, 20... Pullback cylinder, 21, 2
2, 36...Gear cylinder, 21a, 22a...
...Support roll, 28...Travel cylinder, 26,
39...Wheel, 31...Tilting table.

Claims (1)

[Claims] 1 Three movable platens are provided vertically relative to the main body of the cutting device so that they can be raised and lowered, one of the two adjacent platens is provided with an upper blade and a lower blade, and the cutting is performed between the other two adjacent platens. A level adjustment cylinder is provided between the cutting device main body and any one of the three platens, and a level adjustment cylinder is provided between the cutting device main body and one of the three platens, and the upper and lower blades are connected to each other at the tip. The blades have tapered cutting edges, and the blades are vertically symmetrical to each other with a piece of steel in between, and the cutting cylinder and the level adjustment cylinder are simultaneously operated at a speed of V, respectively. (1/
2) A steel billet cutting device characterized by having a structure in which the cutting operation is performed by a V, and a structure in which the upper blade and the lower blade are simultaneously bitten into the steel billet to cut the steel billet.