JPH0218938B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a steel ingot cutting device for continuous casting equipment,
In particular, the present invention relates to a cutting device for cutting a plurality of strands of steel ingots in multi-strand continuous casting equipment.

In some prior art techniques, a lifting frame is provided which is supported on a plurality of strands that are drawn at a constant speed, and a gas cutting torch is provided on the lifting frame so as to be movable laterally perpendicular to the direction of strand drawing. , cutting a multi-strand steel ingot with its gas cutting torch. However, this prior art has a limitation in that a plurality of strands must be cast at the same speed. Further, the clamping force between each strand and the lifting frame on which the gas cutting torch is loaded depends on friction due to the weight of the lifting frame, and reliable clamping is not guaranteed. Therefore, when the lifting frame is supported on multiple strands, the lifting frame may not be positioned perpendicularly to the direction in which the strands are pulled out due to bending or uneven cross-sectional size of each strand. Unable to cut steel ingots to length. Furthermore, this prior art uses a gas cutting torch, and cannot be applied to a device that cuts a steel ingot with a cutting blade because the reaction force during cutting is large.

An object of the present invention is to solve the above-mentioned technical problems and provide a cutting device that can cut a plurality of strands of steel ingots having a plurality of casting speeds to an accurate length with a cutting blade. .

The present invention provides a steel ingot cutting device for continuous casting equipment having a plurality of strands, which includes: a traveling truck that can freely travel along the direction in which the steel ingot is pulled out; a frame fixed to the traveling truck across the plurality of strands; and a plurality of strands. a plurality of fixed cutting blades fixed to the frame in individual correspondence with the fixed cutting blades, a movable cutting blade for cutting the steel ingot together with the fixed cutting blades, a blade holder to which the movable cutting blades are fixed, and a blade holder parallel to the drawing direction. a cutting cylinder that is swingably mounted on the frame and is fixed to a blade holder and drives a movable cutting blade toward and away from a fixed cutting blade; means for swinging the cutting cylinder around the axis so that the blade selectively faces the fixed cutting blade; means for moving the traveling carriage; and position detection means for detecting the traveling position of the traveling carriage. This is a steel ingot cutting device for continuous casting equipment, characterized in that it includes a length measuring means for detecting the length of the steel ingot.

The present invention also provides a steel ingot cutting device for continuous casting equipment having a plurality of strands, which includes: a traveling carriage that can freely travel along the direction in which the steel ingot is drawn; a frame fixed to the traveling carriage across the plurality of strands; A plurality of fixed cutting blades fixed to the frame in correspondence with the strands individually, a movable cutting blade for cutting the steel ingot together with the fixed cutting blades, a blade holder to which the movable cutting blades are fixed, and a blade holder arranged in the drawing direction. A movable body provided on the frame and a movable cutting blade attached to the movable body and fixed to the blade holder are movable in a right-angled horizontal direction between multiple strands, and the movable cutting blade is moved toward and away from the fixed cutting blade. a cutting cylinder that is driven to move the vehicle; a means that is provided on the frame and drives the movable body in the lateral direction so that the movable cutting blade selectively faces the fixed cutting blade; and a means that drives the traveling carriage. A steel ingot cutting device for continuous casting equipment, comprising: a position detecting means for detecting a traveling position of the traveling truck; and a length measuring means for detecting a length of the steel ingot.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway front view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the cutting plane line - of FIG. 1, and FIG. FIG. 3 is a sectional view taken along a cutting plane line. This cutting device 1 can cut a plurality of (two shown) strands of steel ingots 2 and 3 into desired lengths. Moreover, the pulling speeds of the steel ingots 2 and 3 may be different from each other.
runs in accordance with the withdrawal speed of each steel ingot 2, 3.

The cutting device 1 includes a traveling truck 5, a frame 6 fixed to the traveling truck 5, a plurality of fixed cutting blades 7, 8 fixed to the traveling truck 5, and a cutting device 1 perpendicular to the drawing direction 9 of each steel ingot 2, 3. an upper blade holder 10 supported by the frame 6 so as to be able to swing freely within a plane; a movable cutting blade 11 fixed to the upper blade holder 10 and facing the fixed cutting blade 7; The cutting cylinder 1 drives the upper blade holder 10 to move toward and away from 7 and 8.
2, a swinging cylinder 13 for swinging the blade holder 10, a running cylinder 14 for driving the running trolley 5, a position detecting means 15 for detecting the running position of the running trolley 5, and length measuring means 16 for detecting the length.

A pair of bases 17 are provided below the table rollers 20 for conveying the steel ingots 2 and 3 in the drawing direction 9, and are arranged parallel to each other along the drawing direction 9. base 17
A traveling rail 18 is fixed to the upper part of each of the two. Wheels 19 guided by traveling rails 18 are provided at the lower part of the traveling truck 5, so that the traveling truck 5 can freely travel on the traveling rails 18. The traveling cylinder 14 is mounted on a base 17
The tip of the piston rod 14a is connected to the traveling carriage 5. Therefore, by driving the traveling cylinder 14 to expand and contract, the traveling carriage 5 reciprocates on the traveling rail 18.

The frame 6 includes a pair of side plates 2 that extend vertically within a plane perpendicular to the pulling direction 9 and are erected on the traveling cart 5 at positions spaced apart from each other along the pulling direction 9.
1 and 22, and a substantially U-shaped connecting portion 23 which interconnects the side plates 21 and 22 and is open at the top. At the lower part of the side plate 21, through holes 24 and 25 are formed, respectively, through which the steel ingots 2 and 3 run. Further, through holes 26 and 27 are formed in the side plate 22 at positions corresponding to the through holes 24 and 25, respectively, and are wider downwardly than the through holes 24 and 25.

FIG. 4 is a sectional view taken along the section line - in FIG. 3. Between the side plates 21 and 22 of the frame 6, a lower blade holder 28 is provided at a position corresponding to the insertion holes 24 and 26, and a lower blade holder 29 is provided at a position corresponding to the insertion holes 25 and 27. . One lower blade holder 28 has an upper surface 30 that is connected to the lower side of the insertion hole 24 and corresponds to the lower surface of the steel ingot 2, and a side facing away from the lower blade holder 28 that corresponds to the side surface of the steel ingot 2 and is perpendicular to the upper surface 30. A side surface 31 is provided. The upper surface 30 and the side surface 31 are provided with a receiving surface 32 extending horizontally corresponding to the lower side of the insertion hole 26.
are connected to each other via a stepped surface 33. Fixed cutting blade 7
is approximately L-shaped, with the upper surface 30 and side surface 31
and is buried and fixed in a portion defined by the stepped surface 33. The other lower blade holder 29 is configured symmetrically with the one lower blade holder 28 with respect to a vertical plane parallel to the drawing direction 9, and the fixed cutting blade 8 is embedded and fixed therein.

FIG. 5 is a sectional view taken along the section line - in FIG. 3. On both side plates 21 and 22 of the frame 6, trunnion bearings 34 and 35 are provided at the upper center along the lateral direction perpendicular to the drawing direction 9. The cutting cylinder 12 has a trunnion shaft 36 extending radially outwardly along the drawing direction 9;
37 are provided, and their trunnion shafts 3
6 and 37 are pivotally supported by the trunnion bearings 34 and 35. An upper blade holder 10 is connected to the piston rod 38 of the cutting cylinder 12, and the upper blade holder 10 is guided in a guide tube 39 fixed to the cutting cylinder 12 so that it can only reciprocate. The side plates 21 and 22 have arcuate guide holes 4 centered around the trunnion bearings 34 and 35.
0 and 41 are formed, respectively, and wheels 42 and 43 pivotally supported by the guide tube 39 are engaged with these guide holes 40 and 41, respectively. Therefore, the cutting cylinder 12 and the upper blade holder 10 are swingable around the trunnion shafts 36, 37.

A movable cutting blade 11 having a shape corresponding to each of the fixed cutting blades 7 and 8 is fixed to the upper blade holder 10. These movable cutting blades 11 and the fixed cutting blades 7 and 8 are of a so-called diagonal type, and cut the steel ingots 2 and 3 from substantially diagonal directions.

The swing cylinder 13 is mounted on a support base 45 provided at the upper part of the frame 6, and is mounted on the trunnion shaft 36,
It is supported by a pin 46 parallel to 37. The swing cylinder 13 is supported along the lateral direction perpendicular to the drawing direction 9, and its piston rod 47
The leading end of the cutting cylinder 12 is connected to the rear end of the cutting cylinder 12 via a pin 48 parallel to the pin 46. Therefore, by driving the swing cylinder 13 to extend and contract, the cutting cylinder 12 and the upper blade holder 10 swing around the trunnion shafts 36 and 37.

The position detection means 15 includes, for example, a pair of pulleys 50 and 51 provided at both ends of the base 17, and a wire 52 wound around the pulleys 50 and 51 and connected at both ends to the traveling carriage 5. , a pulse generating means 53 that generates pulses in accordance with the rotation of one pulley, for example 50, and the pulse generating means 5.
3, and an integrating means 54 for integrating the position of the traveling carriage 5 in response to pulses from the vehicle 3. Stoppers 55 and 56 are provided at both ends of the base 17 to restrict the traveling of the traveling carriage 5, and when the traveling carriage 5 comes into contact with the stopper 55 on the upper side along the pulling direction 9, the specified time is reached. position. Note that the position detection means 15 is not limited to the configuration described above.

The length measuring means 16 includes, for example, a pulse generating means 58 that generates a pulse according to the rotation of a pinch roller 57 provided on the upper side of the table roller 20 along the drawing direction 9, and a pulse generating means 58 that generates a pulse from the pulse generating means 58. It is provided with an integrating means 59 that integrates the length of the steel ingots 2 and 3 to be pulled out according to the pulse. Note that the length measuring means is not limited to the configuration described above.

The cutting operation of the cutting device 1 configured as described above will be explained with reference to the flowchart shown in FIG. In Fig. 6, L0 is the length to be cut, L1 is the length from the tip of the steel ingot to the specified position, and L2 is the length from the specified position to the fixed cutting blade 7,
8 and the position where the movable cutting blade 11 is located (hereinafter referred to as the blade position). Further, S is a code for determining whether there is a cut point within the traveling stroke of the traveling carriage 5 in another strand, and is expressed by the first equation.

S=(L1-L0)-(L2-L4-L6)...(1) In the first equation, L4 is the upper blade holder 1
This is the value obtained by converting the time required to move 0 into length, and L6 is the value obtained by converting the margin time into length.

The case of S=0 is shown in FIG. That is, B
When the strand finishes cutting the steel ingot 3, A
The cutting point CP of the strand is shown to be immediately above the blade position BP along the drawing direction 9. In the case of S>0, as shown in FIG. 8, it indicates that the cutting point CP of the A strand is on the upper side than the blade position BP, and the distance L thereof is large. Furthermore, if S<0,
As shown in Figure 9, the cutting point CP of A strand
indicates that it is on the lower side than the blade position BP.

The symbol TS in FIG. 6 indicates that the cutting point CP of the other strand is at the specified position OP as shown in FIG. 10.
This is a code for discriminating when it is on the upper side than , and is expressed by the second equation.

TS=L0-L1/VA-L2/VS...(2) In the second equation, VA is the pulling speed in other strands, and VS is the backward speed of the traveling trolley 5 in the opposite direction to the pulling direction 9. .

Referring to FIG. 6, in step n1, the signal from the length measuring means 16 and steps n10, n12,
L1=L2+L0 is calculated based on signals indicating the blade position from n14 and n17. Based on this calculation result, a cutting command is issued in step n2, and in response to this, the traveling carriage 5 starts traveling in step n3. Then steps n4, n5, n6, n7
As a result, the movable cutting blade 11 descends to cut the steel ingot, for example, B, and after completing the cutting, rises and returns to the rising end.

In step n8, it is determined whether or not there is a cut point within the traveling stroke of the traveling carriage 5 in another strand, such as the strand along which the steel ingot 2 is traveling. If there are any cut points, please
The process advances to step n9, and the code S is determined in this step n9. If S=0, step n10
Proceed to. In step n10, the traveling carriage 5 is stopped at the same position. After step n10, the process returns to step n1.

If S<0 at step n9, the process advances to step n11, and in this step n11, the running bogie 5
is retreated in the opposite direction to the pulling direction 9. Moreover,
In step n12, the traveling carriage 5 is stopped at a position where S=0. If S>0 at step n9, the process advances to step n13, in which the traveling carriage 5 moves forward in the pulling direction 9. Furthermore, in step n14, the traveling carriage 5 stops at a position where S=0.

Returning to step n8 again, if there is no cut point in other strands, proceed from step n8 to step n15. In this step n15, whether or not cutting is necessary is determined based on the code TS.
If TS>0 at step n15, step
At step n16, the traveling carriage 5 moves backward in the opposite direction to the pulling direction 9, and at step n17, the traveling carriage 5 stops at the specified position. If TS<0 at step n15, the process proceeds to step n11, where the traveling carriage 5 moves backward, and at the same time, at step n12, the traveling carriage 5 stops at the position where S=0.

In such a cutting device 1, assuming three strands A, B, and C having cutting cycles as shown in FIG. 11, a case will be described in which a steel ingot of these two strands is cut. 11th
In the figure, the horizontal axis represents time, and the vertical axis represents the stroke of the traveling cylinder 14. Note that T1 is the cutting cycle, T2 is the cutting time, and T3 is the time until the blade position returns to the specified position.

A case is assumed in which strands A and B of these three strands A, B, and C are cut by the cutting device 1. The operation in this case is shown in FIG. That is, the traveling cylinder 14 extends to cut the steel ingot of strand A as shown by line l1, completes the cutting at position P1, and then moves to line l2.
The carriage 5 moves slightly backward as shown by line 13, and then stops as shown by line 13. This stop time is the sum of the time for the movable cutting blade 11 to move from strand A to strand B and the margin time.
Next, as shown by line 14, the traveling carriage 5 travels in accordance with the drawing speed of the strand B, and the cutting is completed at position P2. Furthermore, as shown by line 15, the traveling trolley 5 moves backward and returns to the specified position.

The operation when cutting strands A and C among the three strands A, B, and C with the cutting device 1 is as follows.
This is shown in Figure 3. That is, first, strand A
The traveling cylinder 14 extends as shown by line l6 to cut the steel ingot, and the cutting is completed at position P3. Next, the traveling trolley 5 remains stopped at the position P3 as shown by line 17. In this state, the movable cutting blade 11 swings from strand A to strand C, and the cutting operation of strand C is started at position P4. During the cutting operation, the traveling cart 5
Corresponding to the drawing speed of the strand C, the traveling trolley 5 travels as shown by line l8, and moves to position P5.
The cutting is completed. Then, it returns to the specified position as shown by line 19.

Also, as shown by line l10, strand A
When the cutting of strand A is completed at position P6 while the traveling trolley 5 is traveling in accordance with the pulling speed at
As shown in , the traveling carriage 5 is made to travel at a speed higher than the pulling speed of the strand C. It then stops at position P7 as shown by line l12. This stopping time is the sum of the moving time of the movable cutting blade 11 and the margin time. At position P8, the carriage 5 starts traveling as indicated by line l13 in accordance with the pulling speed of strand C, and at position P9 the cutting of strand C is completed. Then, as shown at l14, the traveling carriage 5 returns to the specified position.

In the case shown in FIG. 13, the maximum stroke mS is relatively large. Therefore, the present cutting device 1 is particularly advantageous when the cutting length of a steel ingot is relatively large.

The embodiments shown in FIGS. 1 to 13 are cutting devices that cut steel ingots using the so-called down cut method.
As another embodiment of the present invention, the traveling carriage 5 may be of an overhead traveling type, and the steel ingot may be cut by a so-called upper cut method. In addition,
In the case of the embodiments shown in FIGS. 1 to 13, as shown in FIG. 14, the spring 60 is used to release the table roller 20 on the lower side of the blade position downward in accordance with the cutting cycle. table roller 2
It is necessary to have a structure that supports the table roller 20 or allows the table roller 20 to rotate downward by using a counterweight (not shown).

FIG. 15 is a sectional view of another embodiment of the present invention, and FIG. 16 is a sectional view taken along the section line - in FIG. 15. This embodiment is similar to the previous embodiment, but it should be noted that in place of the guide holes 40, 41 and wheels 42, 43 of the previous embodiment,
Arc-shaped guide surfaces 63 and 64 are formed on the inner surfaces of both side plates, and sliding members 65 and 6 are formed on the guide surfaces 63 and 64.
6 to guide the guide tube 39. This allows the upper blade holder to swing stably.

FIG. 17 is a partially cutaway front view of another embodiment of the present invention, FIG. 18 is a sectional view taken along the cutting plane line - of FIG. 17, and FIG. 19 is a front view of another embodiment of the present invention. 20 is a sectional view taken from the cutting plane line - of FIG. 18, and FIG.
It is a cross-sectional view as seen from above, and parts corresponding to the respective embodiments described above are given the same reference numerals. In this embodiment, a frame 70 is provided fixed to the truck 5 over a plurality of strands (four in the figure). On the inner surfaces of both side plates 71 and 72 of this frame 70, guide projections 7 extending in the lateral direction perpendicular to the pulling direction 9 are provided.
3,74 are formed. These guide projections 73,
74 guides a guide tube 75 that guides the upper blade holder 76 so that it can only make vertical reciprocating motions, and a cutter for driving the upper blade holder 76 up and down is provided on the upper part of the guide tube 75 as a moving body. Cylinder 77 is fixed. Further, the frame 70 is provided with a moving cylinder 80 for driving the guide tube 75, the upper blade holder 76, and the cutting cylinder 77 in the lateral direction.

A movable cutting blade 78 is fixed to the lower part of the upper blade holder 76, and fixed cutting blades 79 are fixed to positions corresponding to each strand of the frame 70, respectively. In this embodiment, the movable cutting blade 78 and each fixed cutting blade 79 perform what is called a flat cut.

FIG. 21 is a sectional view of another embodiment of the present invention, and parts corresponding to each of the embodiments described above are given the same reference numerals. This example is shown in Figures 17 to 20.
Although similar to the illustrated embodiment, it should be noted that the axes of the guide tube 75, upper blade holder 76 and cutting cylinder 77 are inclined at an angle of 45 degrees from the vertical direction. In this way, the movable cutting blade 81 and each stationary cutting blade 82 can be used as a so-called diagonal cut type cutting blade, and good cutting can be achieved.

As another embodiment of the invention, the cutting cylinder 1
2, 77 may be replaced by a driving means using a mechanical flywheel, and the traveling cylinder 14
may be omitted, and the traveling trolley 5 may be a motor-driven self-propelled type.

As described above, according to the present invention, a plurality of strands of steel ingots can be cut with a single cutting device. Furthermore, the distance between the strands can be reduced. In addition, with conventional diagonal cut type cutting devices, the distance between the strands becomes large, resulting in the inconvenience of having to arrange the cutting devices in a staggered manner to reduce the distance between the strands, but this cutting device eliminates this problem. Cutting with a diagonal cut can be performed while keeping the strand spacing small without taking special precautions. Furthermore, since a plurality of strands of steel ingots can be cut, the number of parts such as hydraulic drive units and hydraulic piping is reduced, equipment costs are reduced, and the installation area is reduced.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view of an embodiment of the present invention, FIG. 2 is a sectional view taken along the section line - in FIG. 1, and FIG. 3 is a cross-sectional view taken along the section line - in FIG. 1. Figure 4 is a sectional view taken from the cutting plane line in Figure 3.
Figure 5 is a sectional view taken from the cutting plane line in Figure 3.
6 is a flowchart, FIGS. 7, 8, 9 and 10 are diagrams for explaining the cutting positions in two strands, and FIG. 11 is a diagram showing three strands. Figure 12 is a diagram showing the cutting cycle of strand A in Figure 11,
Diagram showing the cutting cycle when cutting B, 1st
3 is a diagram showing a cutting cycle when cutting strands A and C in FIG. 11, FIG. 14 is a diagram for explaining the structure of a down cut type table roller 20, and FIG. 15 is a diagram showing a cutting cycle when cutting strands A and C in FIG. 16 is a cross-sectional view of the embodiment of FIG.
FIG. 17 is a partially cutaway front view of another embodiment of the present invention, and FIG. 18 is a cross-sectional view of FIG.
Sectional view taken from the cutting plane line - in the figure, No. 19
The figure is a sectional view taken from the cutting plane line - of Fig. 17, Fig. 20 is a sectional view taken from the cutting plane line - of Fig. 18, and Fig. 21 is a sectional view of another embodiment of the present invention. . 1... Cutting device, 2, 3... Steel ingot, 5... Traveling trolley, 6... Frame, 7, 8, 79, 82...
Fixed cutting blade, 9... Pulling direction, 10, 76...
...Upper blade holder, 11,78,81...Movable cutting blade, 12,77...Cutting cylinder, 13...
... Swinging cylinder, 14... Traveling cylinder, 15...
...Position detecting means, 16...Length measuring means, 80...Moving cylinder.

Claims (1)

[Scope of Claims] 1. A steel ingot cutting device for continuous casting equipment having a plurality of strands, comprising: a traveling carriage that can move freely along the direction in which the steel ingot is drawn; a frame fixed to the traveling carriage across the plurality of strands; , a plurality of fixed cutting blades fixed to the frame corresponding to the plurality of strands individually, a movable cutting blade for cutting the steel ingot together with the fixed cutting blades, a blade holder to which the movable cutting blades are fixed, and a drawer. a cutting cylinder that is provided on the frame so as to be able to swing freely around an axis parallel to the direction and that drives a movable cutting blade fixed to the blade holder toward and away from the fixed cutting blade; , means for swinging the cutting cylinder around the axis so that the movable cutting blade selectively faces the fixed cutting blade; means for moving the traveling carriage; and a position for detecting the traveling position of the traveling carriage. A steel ingot cutting device for continuous casting equipment, comprising a detection means and a length measuring means for detecting the length of the steel ingot. 2. A steel ingot cutting device for continuous casting equipment having multiple strands, which includes: a traveling carriage that can freely travel along the direction in which the steel ingot is pulled out; a frame fixed to the traveling carriage across the multiple strands; a plurality of fixed cutting blades fixed to the frame in correspondence with the fixed cutting blades, a movable cutting blade for cutting the steel ingot together with the fixed cutting blades, a blade holder to which the movable cutting blades are fixed, and a lateral direction perpendicular to the drawing direction. A movable body provided on the frame so as to be movable between multiple strands, and a movable cutting blade provided on the movable body and fixed to the blade holder are driven toward and away from the fixed cutting blade. a cutting cylinder provided in the frame, means for driving the movable body in the lateral direction so that the movable cutting blade selectively faces the fixed cutting blade, means for driving the traveling carriage, and the traveling carriage. A steel ingot cutting device for continuous casting equipment, comprising: a position detection means for detecting a traveling position of the steel ingot; and a length measuring means for detecting the length of the steel ingot.