JP2943635B2 - Slab top deburring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deburring apparatus for mechanically removing burrs generated on a lower surface of a gas-cut slab in a slab transfer line such as a continuous casting facility.

[0002]

2. Description of the Related Art In a continuous slab casting facility, a continuously produced slab is cut into a slab of a predetermined length by a cutting machine. A burr is generated in. This burr can be removed in the slab care process, but if the recent slab is rolled with the burr attached without care or with direct heating that is supplied to the rolling process with slight heating, the rolling roll will be damaged. And problems such as the occurrence of surface defects on the product.

For this reason, a slab conveying line of a continuous casting facility is provided with a deburring device for mechanically removing burrs generated on the lower surfaces of the top and bottom of the blown slab with a cutting tool. As this type of conventional deburring device, there is the following device.

(I) General Slab Top and Slab Bottom Deburring Apparatus As shown in FIG.
A slab top deburring device 50 and a slab bottom deburring device 51 that can vertically move a cutting tool 52 extending in the width direction of the slab and move the slab S in the slab transport direction are installed, and temporarily stop the transported slab S. Let the byte 5
2 is moved from the inner side of the lower surface of the slab S toward the slab end surface to cut and remove the burrs B on the slab top or the slab bottom.

(II) Deburring device for slab top (Japanese Utility Model Publication No. 57-1029) As shown in FIG.
A slab stopper 61 in which a stopper plate 61a is urged by a spring 61b, an installation table 62 installed in front of the slab stopper 61, and an installation table 62
A slab S is connected to the stopper plate 61 by a spring 63.
When pushed back by a, the cutting tool 6 at the tip of the removing plate 64
The burrs B are removed by cutting at 4a. Such a slab top deburring device 60 is installed at the end of a slab transfer line of a continuous casting facility, and the slab bottom deburring device 51 of (I) is installed on another transfer line arranged at the subsequent stage. Become.

[0006]

However, the conventional deburring apparatus (I) of the type in which the cutting tool is moved up and down has the following problems.

Since the cutting tool 52 abuts on the burr B as a whole and cuts, the cutting tool may be severely worn and the burr may not be completely removed. The burrs that cannot be removed need to be removed manually, which is troublesome and reduces production efficiency.

As shown in FIG. 7A, since the slab is temporarily stopped and the cutting tool is moved, the transport efficiency is poor and the production efficiency is reduced.

Further, the following problems also exist in the conventional deburring apparatus (II) using a slab stopper and a removing plate with a cutting tool.

Since a spring is used for a mechanism for pushing up the removing plate with a cutting tool, a pushing up force (elastic force) is used.
And burrs cannot be completely removed.

As shown in FIG. 8B, the slab S must be returned once in order to remove burrs on the slab top, and after burrs have been removed, the slab S must be laterally fed to a subsequent transfer line by a pusher or the like. Is poor and production efficiency is reduced.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to surely remove burrs on a slab top and to instantaneously remove slabs during slab conveyance without stopping the slab. It is an object of the present invention to provide a slab top deburring device which can perform the deburring.

[0013]

As shown in FIG. 1, a deburring apparatus for a slab top according to the present invention is a deburring apparatus for removing a burr B generated on a lower surface of a gas-cut slab S. a is, among the transport rolls R of a slab transport line, it is disposed to be swingable vertically slab traveling direction front side as a fulcrum, the slab coming progresses
It has a bite 3 that can be inclined downhill, and a cutting edge that is installed on the top of the bite 3 and extends along the slab advancing direction.
A cutting tool 6 having a cutting tool 6 for cutting into the burr B on the lower surface of the slab top, a tool 4 having a side tool 7 which is inclined backward in the slab advancing direction;
And an actuator such as an air cylinder 5 or a hydraulic cylinder that presses the slab against the lower surface of the slab with the front side in the slab traveling direction as a fulcrum and separates the slab from the lower surface of the slab.

[0014]

In the above structure, as shown in FIG. 4, the cutting tool base 3 is raised by the actuator, and the cutting tool 4 is pressed against the lower surface of the slab. When the slab S is conveyed in this state, first, The cutting tool 6 is cut into the burr B by the pushing force of the actuator to cut into the burr B. Then, while the cut is enlarged at the side tool 7, the contact portion with the burr B sequentially moves outward in the slab width direction. B is cut off. Subsequently, as soon as the cutting and removing of the burr B is completed, the cutting tool base 3 is retracted from the lower surface of the slab by the actuator and separated therefrom.

Since the cutting tool 4 consisting of the cutting tool 6 and the side tool 7 is pressed against the lower surface of the slab, the burr B can be removed instantaneously without stopping the transfer of the slab S, and the pressing force is reduced by the actuator. Burrs B can be surely removed without lowering. Further, the cutting bit 6 can be provided with an appropriate bite angle, thereby making it easier to bite into the burr B. Thereafter, the side bit 7 comes into point contact with the burr B, so that the burr is gradually cut and the slab is conveyed. The burrs B can be surely removed inside, and the wear of the cutting tool 4 can be greatly reduced. Further, after the burrs are removed, the cutting tool 4 immediately separates from the lower surface of the slab and retracts until the slab S has completely passed, so that the lower surface of the slab is not damaged.

[0016]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; 1, 2, and 3 are a perspective view, a side view, and a plan view of a deburring apparatus according to the present invention.
The state of deburring by the deburring device is shown in order.

As shown in FIGS. 1 to 3, a deburring apparatus 1 of the present invention is installed between slab transport rolls R in a slab S transport line. The deburring device 1 mainly includes a cutting tool 3 installed on a base frame 2 so as to be able to swing vertically, a cutting tool 4 mounted on the cutting tool 3,
It is composed of a pair of air cylinders 5 that incline the cutting table 3 in the vertical direction.

The cutting table 3 has a substantially wing shape in a plan view toward the downstream side (front side) in the slab advancing direction, and a support member 10 is vertically disposed downward at a central portion in the slab width direction on the downstream side in the slab advancing direction. Then, the lower end of the support member 10 is attached to the upper end of a fulcrum member 11 projecting from
And can swing vertically. The support member 10 and the fulcrum member 11 are set such that a gap of about 5 to 10 mm is formed between the upper surface of the cutting tool 4 and the lower surface of the slab S (roll upper pass line) when the cutting table 3 is in a horizontal state. The height can be adjusted by the shim 13 shown in FIG.

The air cylinders 5 are arranged in a pair at a distance in the slab width direction below the cutting tool 3 on the upstream side (front side) in the slab traveling direction. This air cylinder 5 is supported on the base base 2 as a center trunnion type,
The tip of the piston rod 5a is pinned to the lower surface of the cutting tool base 3, and the cutting tool 4 is slab-topped while the cutting tool 3 is tilted downward with respect to the slab S traveling by the extension of the piston rod 5a. The lower surface of the slab can be pressed against the burrs B, and the piston rod 5a is retracted from the lower surface of the slab by the contraction of the piston rod 5a to be separated in a parallel state.

As shown in FIG. 2, the air cylinder 5 has
A generally used control circuit including a speed control valve 20, an electromagnetic switching valve 21, and the like is provided.
A pressing force F of 9.6 × 10 ³ N (2.0 tons) is obtained.

The cutting tool 4 is located at the center of the slab width direction and cuts into the burr B. The cutting tool 6 has a V-shaped side tool 7 which is inclined backward with respect to the slab advancing direction at an inclination angle α. It consists of. Each byte 6,
Reference numeral 7 denotes an alloy tool steel (SKD), which is removably inserted into a bite mounting groove formed on the upper surface of the bite base 3, and the side bite 7 is reinforced by a back-up plate 14 with ribs arranged rearward, and a mounting plate is provided. 15 and bolts 16 (see FIG. 1). The width of the cutting tool 4 is set to be larger than the maximum width of the slab.

As shown in FIG. 5, the cutting tool 6
Is a general cutting tool having a cutting edge along the slab traveling direction or a triangular pyramid shape, and has a downward inclination angle β toward the downstream side in the slab traveling direction. The biting angle β ′ into B is obtained. This biting angle β ′ is determined by the air cylinder 5
Can be changed by controlling the stroke of the slab, and appropriately adjusted according to the steel type of the slab. In the case of a normal steel type, it is preferable to set it to around 16 °. In addition, side bite 7
Is a general bite shape with a clearance angle γ on the rear side,
The inclination angle α with respect to the slab width direction is preferably about 11 to 12 °.

A pair of touch rollers 8 are arranged on the upstream side of the side bite 7 in the slab traveling direction at intervals in the slab width direction. The touch roller 8 is mounted on the bite 3
The slab S is rotatably supported by bearings, the upper surface of which is at the same level as the upper surface of the cutting tool 4, and the slab S is moved in parallel with the cutting table 3 by supporting the lower surface of the slab at the time of deburring. It can be so.

In the above configuration, as shown in FIG. 6, the slab top deburring device 1 was installed in the middle of the slab transport line, and the slab top was deburred as shown below. The deburring of the slab bottom is performed by a conventional method by installing a slab bottom deburring device 51 similar to the conventional one at the subsequent stage of the slab top deburring device 1.

(1) The cut slab S is used as a deburring device 1
Before entering the installation position, the piston rod 5a of the air cylinder 5 is extended to incline the slab S entering the cutting tool base 3 with a downward gradient. In this state, the cutting tool 6 is arranged at an angle of bite β ′.

(2) In this state, when the top of the slab S passes, the burrs B on the slab top are completely cut and removed by the cutting tool 6 and the side tool 7 during slab conveyance (see FIG. 4). During the deburring, the cutting tool 3 is pressed down by the action of the air cylinder 5, and a moderate and sufficient pressing force upward is obtained.

(3) The fact that the burrs B on the slab top have been completely cut and removed is detected by contact of the slab top with the touch roller 8, detection of the slab top by a photoelectric sensor, a timer, and the like. 5a
Is contracted, and the cutting tool base 3 is retracted instantaneously downward so that the cutting tool 4 does not damage the lower surface of the slab. By retracting, the influence of the slab radiant heat on the bearings and the like of the touch roller 8 can be reduced.

(4) When the slab completely passes over the cutting tool 4, the bottom of the slab S is detected and the cutting table 3 is moved to (1).
To the state of. By repeating the above, deburring of the sequentially transported slab S is performed.

The biting angle β ′ of the cutting tool 6 is set to about 16 °, and the pushing force F of the air cylinder 5 is set to 2.
When deburring was performed at 0 ton (× 2), the removal rate of conventional burrs was 88%, whereas that of the present invention was 98 to 99%.
It was greatly improved. In addition, in the conventional deburring of the slab top, the slab conveyance has been stopped for about 30 to 40 seconds, but the slab is not stopped in the present invention.

The use of an air cylinder as an actuator allows instantaneous lifting and lowering of the bite table.
Further, there is an advantage that the load from above can be buffered by the compressibility of air. However, a hydraulic cylinder may be used for the actuator, and a spring and an air cylinder may be used together. In the latter case, an upward pressing force is obtained by a spring, and backup is performed by the air pressure of an air cylinder, so that the air cylinder is used for lowering the bite table.

[0031]

As described above, the present invention has the following effects because the cutting tool having the cutting tool and the side tool is pressed against the lower surface of the slab by the actuator.

(1) Burrs on the slab top can be instantaneously removed without stopping the transfer of the slab, thereby improving the slab transfer efficiency and improving the production efficiency.

(2) Since the cutting tool is pressed against the lower surface of the slab by the actuator, burrs can be surely removed by cutting without lowering the pressing force.

(3) After the burrs are removed, the cutting tool can be immediately retracted downward by the actuator, so that there is no scratch on the lower surface of the slab.

(4) The cutting bit is provided with an appropriate bite angle so that it becomes easier to bite into the burr,
After that, since the side tool part is in point contact with the burr and the burr is gradually cut, the burr can be reliably removed while the slab is being transported, and the wear of the tool can be greatly reduced, and the tool is stable for a long time. Can be used.

(5) The bite angle of the cutting bite can be changed, and it can be applied to all types of steel.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a slab top deburring apparatus according to the present invention.

FIG. 2 is a side view of the deburring apparatus of FIG.

FIG. 3 is a plan view of the deburring apparatus of FIG. 1;

4 (a) is a schematic side view and FIG. 4 (b) is a schematic bottom view showing the deburring state of the present invention in order.

FIG. 5 is a cutting tool according to the present invention, in which (a) is an overall plan view, (b) is a side view of the cutting tool, (c) is a front view of the cutting tool, and (d) is a cross-sectional view of the side tool. .

FIG. 6 is a schematic plan view showing a slab transfer line according to the present invention.

7A is a schematic plan view showing a conventional general slab transfer line, and FIG. 7B is a schematic side view showing a deburring device.

FIG. 8A is a vertical cross-sectional view showing a conventional deburring apparatus using a slab stopper and a removing plate with a cutting tool, and FIG. 8B is a schematic plan view showing a slab transport line.

[Explanation of symbols]

 S: slab B: burr R: slab transport roll 1: deburring device 2: base mount 3 ... bite table 4 ... bite 5 ... air cylinder 6 ... cutting bite 7 ... side bite 8 ... touch roller 10 ... support member 11 ... fulcrum Member 12 fulcrum pin 13 shim 14 backup plate 15 mounting plate 16 bolt

──────────────────────────────────────────────────続 き Continued on the front page (56) References Japanese Utility Model 57-56552 (JP, U) Japanese Utility Model 3-59115 (JP, U) Japanese Utility Model 1-84864 (JP, U) Japanese Utility Model Sho 64- 38218 (JP, U) Japanese Utility Model Showa 60-99050 (JP, U) Japanese Utility Model Utility Model Showa 57-86718 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B22D 11/126

Claims (1)

(57) [Claims] 1. A deburring device for removing burrs formed on a lower surface of a gas-cut slab, wherein the burrs are formed between conveying rolls of a slab conveying line in a forward direction of the slab.
It is installed so that it can swing vertically with the side as a fulcrum,
A bite that can be inclined downhill with respect to the incoming slab, and installed on the top of this bite ,
A cutting tool having a cutting edge along the cutting surface and a cutting tool for cutting into burrs on the lower surface of the slab top, and a tool having a side bite portion inclined backward in the slab advancing direction . A deburring device for a slab top, comprising an actuator for pressing and separating from a lower surface of the slab.