JP4685069B2 - Slab deburring device - Google Patents

Description

The present invention relates to a slab deburring device. More specifically, the present invention relates to a deburring device that removes burrs generated by cutting when a slab continuously cast in a continuous casting facility is cut to a predetermined length.
As the slab continuously cast becomes higher speed casting, the slab temperature rises and the ratio of remaining burrs increases, so the product loss in the rolling process increases and the yield deteriorates. However, if the casting speed is lowered to suppress the generation of burrs, the production volume will not increase. The present invention relates to a deburring apparatus that removes burrs that greatly affect productivity in this way before entering the rolling process.

There are various types of slabs cast in a continuous casting facility, such as large slabs and blooms and small billets.
In slabs and blooms with a large slab size, the slab is often cut by gas. For this reason, the amount of burrs is large, and the deburring device uses a hammer method, a peristaltic blade method, etc. (Patent Documents 1 to 4).
These conventional techniques are methods for removing burrs adhering to the lower surface of the slab, but in the case of gas cutting with a torch, burrs (especially sagging due to gas fusing) concentrate on the lower side of the slab. In particular, there is no problem with the method of scraping the lower surface with a hammer or a blade.

Billets with a small slab size are designed to be cast at high speed due to productivity and product conditions. Since short cutting is important, time-consuming gas cutting is not used and a hydraulic shear (cutlery shearing machine) is used. The slab cutting is performed by.
This hydraulic shear is cut by two upper and lower blades, and depending on the temperature of the slab, cutting sag and surface nose often remain on the cut surface and the lower surface. In this case, there are many examples in which these burrs are bitten into product ridges (eg, scabs) when rolled directly after billet transport or after reheating.

  FIG. 10 shows the prior art. The slab C drawn out from a continuous casting facility (not shown) is conveyed by the subsequent roller table 110 via the tilting roller table 101. A guillotine type hydraulic shear 100 is arranged on the entrance side of the tilting roller table 101. Since the tilting table 101 needs to be inclined in accordance with the descending operation of the slab C cut by the lowering of the upper blade of the hydraulic shear 100, the rear end is supported by the hinge 104 and the front end is supported by the cylinder 105. Yes. The cutting by the hydraulic shear 100 is due to guillotine type shear (guillotine type), so that no melting sag occurs, but the residual burrs in the “pulling and shredding” action peculiar to high-temperature material shearing or the slab C There are many cases where burr to the corner occurs. In this specification, cutting sagging, surface cutting, residual burrs, burr and the like are collectively referred to as “burrs”. This burr is shown by the symbol b in the cross-sectional enlarged view of the slab in FIG.

  In addition, the burr generating element when cutting the billet slab is that the gap between the blades in the hydraulic shear 103 becomes large, the sharpness deteriorates, the slab temperature becomes high (900 ° C or higher), and both the cut surface and the bottom surface Burrs may adhere to the surface.

The burrs generated in the billet slabs as described above are too small, the mounting positions differ depending on the individual slabs, or they adhere to the cut surface itself. With the method of scraping off the burrs protruding from the lower surface, burrs adhering to the cut surface of the slab cannot be removed.
For this reason, the apparatus which removes the burr | flash peculiar to billet slab is desired.

JP-A-10-156498 JP-A-11-254111 JP 2000-52007 A JP 2001-205404 A

  In view of the above circumstances, an object of the present invention is to provide a deburring device capable of removing a slab cutting surface and cutting burrs attached to the underside thereof. Another object of the present invention is to provide a deburring device that can remove burrs without stopping billet conveyance.

A deburring device for a slab according to a first aspect of the present invention is a deburring device for deburring a cut portion of a slab, comprising a deburring roller for removing deburring from a slab that is fed on a conveying table, and the deburring roller. A deburring head composed of a motor that rotates and a mounting base that supports the motor, and supports the deburring head, and the deburring roller moves while being in contact with the cut surface and the lower surface of the slab being conveyed. It is characterized by comprising a guide mechanism for guiding.
The deburring apparatus for a cast slab according to a second aspect of the present invention is the first aspect, wherein the guide mechanism comprises a moving table that supports a mounting base of the deburring head, and a guide member that guides the movement of the moving table, The guide member includes a rectilinear portion that guides the moving table in the slab conveying direction, and a downward inclined portion that inclines the moving table downward with respect to the slab conveying direction.
The slab deburring device according to a third aspect of the present invention is the deburring device according to the first aspect, wherein a lever is swingably attached to the moving table of the guide mechanism by a fulcrum pin, and the deburring head is attached to one end of the lever. The urging cylinder is connected to the other end of the lever, and the urging cylinder tilts the mounting pedestal to convey the deburring roller of the deburring head. It can be made to contact the lower surface of this.
The deburring device for a slab according to a fourth aspect of the present invention is the deburring apparatus according to the first aspect, wherein the urging cylinder is an air cylinder, and an air supply / discharge circuit is connected to the air cylinder. When the deburring head is pushed by the slab being conveyed and moves in the same direction, a pressure regulating valve adjusted to generate a movement resistance is interposed.

According to the first invention, if the deburring roller of the deburring head is rotated when the slab is fed on the transport table, the deburring roller is moved while the slab moves while pushing the deburring roller. Is guided by the guide mechanism so as to come into contact with the cut surface and the lower surface of the slab, the burrs of the slab can be removed by the rotating deburring roller.
According to the second aspect of the invention, while the moving table is being moved straight by the linearly moving portion of the guide member, the deburring roller of the deburring head supported by the moving table is in contact with the cut surface of the slab and the burrs are removed. Then, when the moving table enters the downward inclined portion, the deburring roller is also lowered, so that the burrs can be removed from the upper portion toward the lower portion. For this reason, the deburring of a cut surface can be performed reliably.
According to the third invention, when the deburring of the cut surface of the slab is finished, the deburring head enters the downward inclined portion of the guide member and the deburring roller is lowered. When the take-up head mounting base is tilted, the deburring roller moves upward and contacts the lower surface of the slab. For this reason, the burr | flash following the slab lower surface from the cut surface of a slab can also be removed completely.
According to the fourth invention, while the deburring roller for removing burrs on the cut surface of the slab is pushed by the slab and moves in the slab conveying direction, the air cylinder as the urging cylinder is extended. Since the air pressure discharged from the air supply / discharge circuit during this extension operation is regulated by the pressure regulating valve, the air cylinder urges the deburring roller to press against the slab cutting surface. Can be removed reliably.

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a transfer table provided with a deburring device A according to an embodiment of the present invention. In the figure, reference numeral 100 denotes a hydraulic shear for cutting the slab C, and 101 denotes a tilting table which is a kind of transfer table. Two slabs C are shown, one preceding and one following.
The slab C to be deburred according to the present invention is typically a billet having a small size, but can be applied to any slab as long as the slab C is guillotine-cut by the hydraulic shear 100.
Reference numeral A denotes a deburring device of the present invention. In the first embodiment, the deburring device A is installed on the entrance side of the tilting table 101.

FIG. 2 is a side view of the deburring device of FIG. FIG. 3 is a plan view of the deburring device of FIG. 4 is a cross-sectional view taken along line 4A in FIG. 2, and FIG. 4B is a cross-sectional view taken along line 4B in FIG.
2 to 4, reference numeral 1 denotes a deburring head, which includes a deburring roller 2, a motor 3, and a mounting base 4. The deburring roller 2 in this embodiment is a grindstone type that scrapes off burrs. The motor 3 rotates the deburring roller, and the mount 4 supports the motor 3. The motor 3 is preferably an air drive type. The reason will be described later.

Next, the guide mechanism 10 will be described.
The guide mechanism 10 includes a moving table 11 and a guide member 21. The moving table 11 is a member that supports the mounting base 4 of the deburring head 1, and four guide rollers 12 are rotatably mounted on the front, rear, left and right thereof.
The guide member 21 includes left and right guide plates 22, 22, and guide grooves 23, 23 are formed inside the guide plates 22, 22. The guide groove 23 has a straight portion 2.
3A and the downward inclination part 23B which inclines below from the front-end | tip.

The guide roller 12 of the moving table 11 rolls the guide grooves 23 and 23 of the left and right guide plates 22 and 22 to guide the movement of the deburring head 1. The deburring head 1 linearly moves in the slab conveying direction while the guide roller 12 is moving along the rectilinear portion 23A, and the deburring head 1 descends below the pass line of the slab C when entering the downward inclined portion 23B. It is like that.
As shown in FIG. 4A, left and right guide side rollers 13 are also attached to the mounting base 4 of the deburring head 1, and the mounting base 4 and the movable table 11 are connected to the left and right guide plates 22, It moves smoothly between 22.

As shown in FIGS. 2 and 4A, a boss 14 is formed on the distal end surface of the movable table 11, and a cushion cylinder 15 is attached. The cushion cylinder 15 is a cylinder filled with a compressive fluid such as air, and contracts due to an external force. When the external force disappears, the cushion cylinder 15 returns to its original length.
A lever 16 is connected to the tip of the cushion cylinder 15. The mounting base 4 of the deburring head 1 is fixed to the upper end of the lever 16, and the piston rod 31 of the urging cylinder 30 is connected to the lower end of the lever 16.

The urging cylinder 30 is composed of an air cylinder. The air cylinder is attached to the guide plates 22 and 22 while being supported by a trunnion 33 at a substantially center of a cylinder body 32 so as to be swingable.
The air supply / discharge circuit of the urging cylinder 30 is as shown in FIG. A supply / discharge pipe 33 is connected to the rod side chamber 30a of the urging cylinder 30, and a supply / discharge pipe 34 is connected to the non-rod side chamber 30b. An electromagnetic valve 37 is interposed between the supply / discharge pipes 33 and 34 and the air source 35 and the exhaust pipe 36. The electromagnetic valve 37 is a four-port type electromagnetic switching valve. In the right position I, air is supplied to the rod side chamber 30a of the urging cylinder 30 to perform a reduction operation, and in the left position II, air is supplied to the non-rod side chamber 30b. It is designed to extend. Further, at the intermediate position, the urging cylinder 30 is freely extended.
In addition, a pressure regulating valve 38 is interposed in the supply / discharge pipe 33 so as to adjust the maximum air pressure in the rod side chamber 30a. This adjustment pressure is set to a pressure that generates a contact force necessary for the deburring roller 1 to contact the cut surface of the slab C and remove the burrs.

Next, the deburring operation of the deburring apparatus A in the present embodiment will be described with reference to FIGS.
(1) FIG. 6A shows an initial state, and the moving table 11 that supports the deburring head 1 is located at the starting point of the rectilinear portion 23A in the guide groove 23. In this state, the deburring roller 2 is rotated by the motor 3. When the slab C is conveyed in the direction of the arrow from the left to the right in the figure, the deburring is started when the cut surface (front end surface) of the slab C contacts the deburring roller 2. That is, burrs are scraped off with the grindstone of the deburring roller 2.

(2) FIG. 6 (B) shows a state where the deburring roller 2 is pushed by the slab C being conveyed, and the burring head 1 is moving while removing the burrs on the slab cutting surface. ing.
In this state, the deburring roller 2 is rotating, and the moving table 11 is guided by the rectilinear portion 23A of the guide member 22 and moves in the same direction as the slab conveying direction.
At this time, the piston rod 31 of the urging cylinder 30 is pulled by the moving table 11 and extends in the same direction.
As shown in FIG. 5, when the piston rod 31 is pulled, the air in the rod side chamber 30a is discharged from the pressure regulating valve 38 through the supply / discharge pipe 33. The pressure is set to be pressed against the end face of the piece C with an appropriate pressing force. For this reason, the burr | flash of the end surface of the slab C can be scraped off reliably.

(3) FIG. 6 (C) shows a state further advanced from the state of FIG. 6 (B). When the moving table 11 enters the downwardly inclined portion 23B from the rectilinear portion 23A of the guide groove 23, the moving table 11 is inclined, so that the position of the deburring roller 2 is also lowered.
For this reason, the burr | flash of a slab end surface is also scraped away from upper direction toward the downward direction.

(4) As shown in FIG. 7D, when the moving table 11 completely enters the downward inclined portion 23B of the guide groove 23, the deburring roller 2 descends below the lower end edge of the slab C. . By this movement, the burr on the cut surface is completely scraped to the lower end.
The deburring roller 2 once further descends from the lower surface of the slab C, and a gap g is formed between the deburring roller 2 and the pass line L.

(5) FIG. 7 (E) shows a state immediately after FIG. 7 (D). At this time, the piston rod 31 of the urging cylinder 30 is extended (the cushion cylinder 15 is slightly reduced at this time), The lever 16 is tilted. Then, the mounting base 4 of the deburring head 1 is inclined and the deburring roller 2 is slightly raised and contacts the lower surface of the slab C.
In this state, the burr on the lower surface following the cut surface of the slab C is scraped off.

(6) FIG. 7 (F) shows a state after the burrs on the lower surface of the slab C have been removed, and the urging cylinder 30 is slightly reduced. As the cushion cylinder 15 extends along with this movement, the mounting base 4 returns to a state parallel to the moving table 11, and the deburring roller 2 descends from the bottom surface of the slab C by a gap g.
For this reason, the slab C is conveyed toward the conveyance table (illustration omitted) of a post process, without receiving any resistance.
When the urging cylinder 30 is further contracted after the rear end of the slab C has passed, the deburring head 1 is pulled back to the original state, that is, (1) the position shown in FIG.

  As described above, according to this embodiment, since it can be sent to the subsequent process in a state where the burrs of the slab C are completely removed, no product defects are generated. Therefore, the casting speed of the continuous casting equipment can be increased, and productivity can be maintained high. Moreover, since deburring can be performed while the slab C is being conveyed, this point can also contribute to the improvement of productivity.

In addition, since the motor 3 and the urging cylinder 30 in the present embodiment are air-driven, there are the following advantages.
a) Since it is only necessary to divide existing factory air piping and install the piping, the availability of air is simple.
b) Since air after being used for driving may be discharged to the atmosphere, return piping is not required compared to hydraulic pressure.
c) Since hydraulic oil does not circulate like hydraulic pressure, it is always only one way of supply, so there is no need to consider the temperature rise from the ambient heat source and ambient temperature caused by the air staying in place. In addition, the cooling effect is more advantageous than other methods by always supplying new air at normal temperature.
d) Since there is an environment where the cooling water is scattered around the arrangement place, it is not necessary to take into account the necessary insulation by electric drive.
e) Compared to electric operation, the operation panel, the control panel, and the like are unnecessary, and the cost is low.
f) The running cost of air is lower than that of electric.

Next, another embodiment of the present invention will be described. Although the deburring roller 2 in the embodiment is a grindstone type, a rotary hammer type as shown in FIG. 8 may be used.
The rotary hammer is a rotating member having irregularities formed on the outer periphery, and strikes the burr b at the convex portion. Any rotary hammer can be used as long as it can strike and remove the burr b.
In addition to the above-described grindstone type and rotary hammer type, any type of deburring roller may be used as long as the burr b can be removed.

In the above-described embodiment, the deburring device A is installed on the entry side with respect to the tilting roller table, but it may be arranged on the exit side or the intermediate portion of the tilting roller table.
Furthermore, you may install in the conveyance table downstream of a tilting roller table.
FIG. 9 shows an example in which the deburring device A is installed on the exit side of the roller table 110, which is one of the downstream transport tables, but the roller table 110 may be installed on the entry side or in the middle.
In these installation examples, the same effects as in the above embodiment can be exhibited.

It is a side view of the conveyance table which installed the deburring apparatus which concerns on one Embodiment of this invention. (A) is a side view of the deburring device of FIG. 1, and (B) is an explanatory view of the guide groove 23. It is a top view of the deburring apparatus of FIG. FIG. 4A is a sectional view taken along line 4A in FIG. 2, and FIG. B is a sectional view taken along line 4B in FIG. 3 is a supply / discharge circuit diagram of an urging cylinder 30. FIG. FIGS. 4A to 4C are explanatory views of the first half of the deburring operation. (D)-(F) is explanatory drawing of the second half of the deburring operation | work. It is explanatory drawing of the other example of a deburring roller. It is another example of attachment of the deburring apparatus of this invention, (A) is a top view, (B) is a side view. It is explanatory drawing of the problem of the conventional slab conveyance equipment.

Explanation of symbols

DESCRIPTION OF SYMBOLS A Deburring apparatus 1 Deburring head 2 Deburring roller 3 Motor 4 Mounting base 10 Guide mechanism 11 Moving table 12 Guide roller 21 Guide member 22 Guide plate 23 Guide roller groove 23A Straight part 23B Downward tilting part 30 Energizing cylinder 31 Piston rod

Claims (4)

A deburring device for deburring a cut part of a slab,
A deburring roller for removing burrs from a slab to be sent on the conveying table, a motor for rotationally driving the deburring roller, and a deburring head comprising a mounting base for supporting the motor;
A deburring device for a slab comprising a guide mechanism that supports the deburring head and guides the deburring roller so as to move while being in contact with a cut surface and a lower surface of the slab being conveyed. . The guide mechanism is
It consists of a moving table that supports the mounting base of the deburring head, and a guide member that guides the movement of the moving table,
The said guide member consists of a rectilinear part which guides the said movement table to a slab conveyance direction, and a downward inclination part which inclines the said movement table downward with respect to a slab conveyance direction. Slab deburring device. A lever is swingably attached to the moving table of the guide mechanism by a fulcrum pin. A mounting base for the deburring head is fixed to one end of the lever, and a biasing cylinder is provided to the other end of the lever. Are connected,
2. The deburring of a slab according to claim 1, wherein the urging cylinder can tilt the mounting base to bring the deburring roller of the deburring head into contact with the lower surface of the slab being conveyed. apparatus. The urging cylinder is an air cylinder, and an air supply / discharge circuit is connected to the air cylinder, and the deburring head is pushed in the same direction by the slab being conveyed to the air supply / discharge circuit. 2. The slab deburring device according to claim 1, further comprising a pressure regulating valve adjusted to generate a movement resistance when moving.

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