JP2000210810A - Deburring method and device at joint in continuous rolling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deburring method and device that reduces load on a cutting tool at deburring, prevents damages of the cutting tool and is possible to exchange deburring tools quickly on a deburring method and device for a joint of rolling material in continuous rolling of metals, especially steels. SOLUTION: A deburring method and device at joint removes burr by tilting a blade 3 of a cutting tool for deburring to remove burr 4 at joint to a joint surface 5 after joining a preceding material 1 and succeeding material 2 to be rolled by continuous rolling. The device is provided with a deburring tool 3 to remove burr, a tool stand to fix deburring tool, a unit frame to install the tool stand so that it can be moved, a transfer device for moving the tool stand on the unit frame, and a deburring frame to mount the unit frame.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for deburring a rolled material joint in continuous rolling of metal, particularly steel.

[0002]

2. Description of the Related Art Conventionally, in hot rolling of a metal, for example, steel, a rolled material having a predetermined length is individually rolled on each strand. In this case, since the tension at the front and rear ends of the rolled material is not applied during rolling, the dimensions are deviated, and the leading and trailing ends have to be trimmed for each rolled material. In addition, the rolled material after finish rolling has a small cross-sectional area and a high rolling speed, so that the leading end of the rolled material without tension is unstable, and the rolled material is liable to cause misrolling due to tipping. At present, in the field of wire rods, the rolling speed has been increasing, and the progress speed after finish rolling has reached 100 m or more per second. Also,
In order to omit the step of secondary processing using a wire as a material, the diameter of the product after the wire rolling has been reduced, and the probability of occurrence of misroll has been increased due to the increase in speed and the reduction in diameter.

[0003] There is known a continuous rolling method in which the rear end of a preceding rolled material that has started rolling and the leading end of a succeeding rolled material extracted from a heating furnace are sequentially joined to perform endless rolling. If this continuous rolling method is employed, the trimming loss at the leading and trailing ends of the rolled material and the occurrence of misrolling at the leading end of the rolled material in the conventional discontinuous rolling are greatly reduced. In continuous rolling, a traveling joining device is arranged between the extraction end of the heating furnace and the rolling mill, and the traveling joining device travels with the preceding material that has started rolling, and is extracted from the rear end of the preceding material and the heating furnace. Join the tip of the row material.

[0004] As a joining method of the preceding material and the succeeding material, a butt welding method such as an upset welding method or a flash butt welding method capable of joining the end faces of the rolled material over the entire surface is used. When rolling and reducing the cross-sectional area of a steel bar or wire rod using a roll with a caliber hole shape while reducing the cross-sectional area greatly, the joints must be firmly joined so that the joints do not break during rolling. In addition, the yield loss due to joining must be reduced as much as possible, but these conditions can be satisfied with the butt welding method. Above all, in the flash butt welding method, since the bonding surface is melt-bonded by flash and then pressurized, the entire surface can be bonded without end face processing if a certain level of flatness is maintained. Therefore, as a method of joining a rod-shaped rolled material such as used as a rolled material of steel bars and wires,
The flash butt welding method is optimal. In flash butt welding, the leading material and the following material are each held by a holder also serving as an electrode, and then the trailing edge of the preceding material and the leading edge of the following material are brought into contact. Butt welding using arc heat generated after melting and scattering.

In flash butt welding, burrs are formed on the outer periphery of the joint in such a manner that the joint rises outward.
The burr portion includes, in addition to the protruding portion formed by the protruding portion of the rolled material at the time of pressure welding, flash pieces spattered by flash butt welding and attached to the vicinity of the joint portion of the rolled material. If rolling is carried out without removing this burr, the raised portion will be broken by rolling and become a surface defect, and the attached burr pieces will fall off and bite into the surface of another portion of the rolled material again. The flaws due to foreign matter biting occur frequently after the welded portion of No. 1 and become defective due to surface defects over the entire length of the product. Therefore, when performing full-surface joining of the rolled material end faces by flash butt welding in endless continuous rolling, it is necessary to deburr the joining portion before rolling, and a deburring device is required between the joining device and the rough rolling mill. Is installed.

In a deburring apparatus, burrs are removed by cutting using a deburring tool or grinding using a grinder. In the case of cutting using a cutting tool, the cutting edge of the cutting tool is arranged perpendicular to the rolled material, that is, parallel to the joining surface of the joint, and burrs on each surface of the rolling material are removed. A deburring tool is fixed along the surface of the rolled material, and the rolled material moves with the progress of rolling to remove burrs. The driving force of the rolled material is the burr removing force.

[0007]

In a conventional apparatus for performing deburring using a cutting tool, a large load is applied to the cutting tool at the moment when the cutting tool hits the burr portion, and the cutting tool is damaged. In such a case, it was necessary to suspend rolling, and the rolling efficiency was reduced. Further, the mechanism for holding the cutting tool is elastically deformed by the large load, and the cutting tool sometimes escapes from the surface of the rolled material, so that burrs cannot be sufficiently removed. In order to overcome the large load and remove the burrs, the rolled material had to be advanced with an excessive force. Further, there is a problem that sagging occurs on the rolled material surface after deburring and flaws occur on the surface after rolling.
Further, even in the case of removing burrs by grinding using a grinder, it is necessary to suspend rolling in order to replace the grindstone, resulting in a reduction in rolling efficiency.

The present invention reduces the load on the cutting tool during deburring, prevents breakage of the cutting tool, prevents the cutting tool from escaping from the surface of the rolled material, and enables deburring with a reduced rolling material propulsion force. It is an object of the present invention to provide a picking method and apparatus. It is another object of the present invention to provide a deburring apparatus that can easily and easily change tools such as a tool and a grinder grindstone in a short time.

[0009]

That is, the gist of the present invention is as follows. (1) After joining the preceding material 1 and the succeeding material 2 which are rolled by continuous rolling, the burrs 4 at the joining portion are removed. A method of removing burrs, wherein the burrs are removed by inclining the blade 3 of the deburring tool with respect to the joining surface 5. (2) 20 ° to 45 ° of the cutting blade 3 with respect to the joining surface 5
The method according to the above (1), wherein the joint is deflected. (3) A deburring device for removing a burr 4 at a joining portion after joining a preceding material 1 and a following material 2 to be rolled by continuous rolling, wherein a blade 3 of a burr removing tool has a joining surface 5 A deburring tool having a deburring tool (3) inclined with respect to (b). (4) The cutting edge 3 of the cutting tool is 20 ° to 45 ° with respect to the joining surface 5
The joint deburring device according to the above (3), wherein the device is inclined. (5) A deburring device for removing a burr 4 at a joint portion after joining a leading material 1 and a following material 2 that are rolled by continuous rolling, and a deburring tool 3 for removing the burr. A tool base 7 for fixing a deburring tool, a unit frame 9 for movably installing the tool base, a moving device 8 for moving the tool base on the unit frame, and a deburring for mounting the unit frame A joint deburring device comprising a frame (10). (6) The deburring device according to (5), wherein the unit frame 9 is detachable by sliding on the guide surface 11 of the deburring frame 10. (7) The deburring tool is a deburring tool, and the blade 3 of the deburring tool is inclined with respect to the joining surface 5. (5) or (6). Joint deburring device. It is.

[0010] In the inventions of the above-mentioned constitutions (1) to (4), the blade 3 of the deburring tool is inclined with respect to the joining surface 5 so that the burr 4 simultaneously hits the tool during the entire deburring operation. The situation is avoided, and the burrs are sequentially removed while shifting the time, reducing the load on the tool during deburring, preventing the tool from being damaged and preventing the tool from escaping from the rolled material surface. In addition, less rolling material propulsion is required during deburring. Also, no sagging occurs on the rolled material surface after deburring.

In the inventions having the above-mentioned constitutions (5) to (7), the deburring frame 10 is fixedly incorporated into the rolling line. The deburring tool 3, the tool stand 7, and the moving device 8 for moving the tool stand are all mounted on the unit frame 9. Since the unit frame 9 can be easily attached to and detached from the deburring frame 10, when replacing the deburring tool 3, the unit frame 9 was first removed from the deburring frame 10, and the maintained deburring tool 3 was attached. Deburring frame 1 for another unit frame 9
The tool change is completed in a short time by attaching to 0. Maintenance of the deburring tool 3 of the removed unit frame 9
Since the exchange is performed off-line, the productivity of the rolling line is not hindered. Furthermore, since the deburring tool can be mounted and adjusted in a place where workability is good, maintenance work efficiency is improved and highly accurate adjustment is possible.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As a method for joining end faces of a rolled material, flash butt welding is most commonly used. In flash butt welding, when performing endless continuous rolling using the joined rolled material,
It is necessary to perform firm joining so that the joined portion of the rolled material does not break during the rolling. In addition, in order to make equipment related to joining compact, it is necessary to join a bar-shaped steel material having a large cross-sectional area, which is used as a rolled material of a bar or a wire, in a short time, and to shorten a traveling distance for the joining. The short circuit current between the electrodes is 5 to 10 A / mm ² , and the no-load voltage between the electrodes is 5 to 30
V. By performing welding under the condition that the platen moving speed is 1 to 5 mm / sec, a rod-shaped hot steel material having a large cross-sectional area can be joined in a short time, and the joining-related equipment can be made compact. . In addition to the above welding conditions, by setting the joining surface pressure to 2 kg / mm ² or more,
Stable endless continuous rolling can be performed without breaking the steel joints during rolling.

With reference to FIG. 1, a method of removing burrs by inclining a cutting bit of a cutting tool with respect to a joining surface according to the present invention will be described with reference to FIG. 1 taking continuous rolling of a bar steel such as a bar or a wire rod as an example.

In the flash butt welding, since the joining is performed by applying a surface pressure, the joining surface 5 after the joining rises (burrs 4) on the outer peripheral portion. The burrs 4 are removed by the deburring method of the present invention. Deburring is performed by moving the cutting blade 3 along the surface of the rolled material 1 in the longitudinal direction of the rolled material 1. At the raised portion of the burr 4, the cutting blade 3 is removed by cutting the burr 4.

In the present invention, as shown in FIG. 1, the cutting edge 3 of the cutting tool is inclined with respect to the joining surface 5. Therefore, as the cutting blade 3 moves in the longitudinal direction of the rolled material, the cutting blade 3 sequentially reaches the burr portion from the side closer to the burr, and cuts and removes the burr. Join the cutting blade 3 to the joining surface 5
As compared with the conventional method (FIG. 3) in which the cutting tool 3 is arranged in parallel to the cutting tool, it is possible to avoid a situation in which a large load is instantaneously applied to the cutting tool when the cutting tool 3 cuts the burr 4, and it is possible to prevent the cutting tool from being damaged. In addition, since the force applied to the cutting blade is reduced, it is possible to prevent the cutting blade from escaping during burr cutting even if the rigidity of the support mechanism of the cutting blade 3 is not high. Also, no sagging occurs on the rolled material surface after deburring.

The inclination angle θ between the cutting blade 3 and the joining surface 5 is preferably in the range of 20 ° to 45 °. If the angle is less than 20 °, a large load is instantaneously applied to the cutting tool. Therefore, the rigidity of the cutting tool and the support mechanism must be increased. A mechanism to do this is essential. Further, it is necessary to increase the lateral rigidity of the deburring device.

The means for moving the bit 3 of the cutting tool in the rolling longitudinal direction of the rolled material 1 may adopt a method of moving the bit 3 of the bit. On the other hand, since the rolled material 1 moves in the traveling direction 6 of the rolled material along with the rolling, a method of cutting the burrs as the rolled material moves while the cutting blade 3 is fixed may be adopted. By adopting the latter method, the deburring apparatus can be made compact. In the present invention, since the force applied to the cutting tool blade and the rolled material during burr removal as a result of inclining the cutting tool blade 3 is small, the force for pulling the rolled material 1 in the direction opposite to the rolling direction along with the burr removal is also small. Therefore, the adverse effect on the rolling due to the removal of burrs can be reduced.

When the rolled material is a square billet for bar and wire rolling, a tool bit is disposed on each surface of the billet in order to remove burrs on the four surfaces. If the cutting tool blades (3a, 3b) arranged on the two opposing surfaces are arranged at the same position in the rolling longitudinal direction as shown in FIG. 1B, the cutting tool bends the rolled material when removing burrs. Even if such a force is applied, the forces from the bites on both sides of the rolled material cancel each other out, and it is possible to prevent the rolled material from escaping from the bite. In addition, as shown in FIG. 2, by disposing the blades of the cutting tool arranged on the two adjacent surfaces so as to be shifted in the longitudinal direction of the rolling, the burrs on the four surfaces are not removed at the same time. Can be reduced. In FIG. 2, the cutting blades (3c, 3d) are arranged to be shifted in the rolling longitudinal direction with respect to the cutting blades (3a, 3b). Fig. 2
The direction of the inclination of the blade of the cutting tool on the two opposing surfaces may be the same direction as in (a), or may be the opposite direction as in FIG. 2 (b). If the direction is reversed as shown in FIG. 2B, the effect of canceling out the forces to deflect the rolled material in the lateral direction is produced.

After performing the deburring of the present invention, it is not necessary to completely flatten the burrs. If the height of the remaining burrs is suppressed to 2% or less of the thickness of the rolled material, the dimensions of the deburred portions after rolling can have sufficient accuracy as a product.

When the present invention is applied to rolling of steel, the joint surface temperature immediately after joining by flash butt welding is about 1
400 ° C. In general, cemented carbide is used for the blade of the deburring tool.
Is used, and the melting point of Co is a value close to the surface temperature of the joint immediately after the joining. Therefore, in order to prolong the life of the cutting tool blade, it is necessary to cool the cutting tool blade with water or the like at the time of deburring.

When the radius of the corner portion of the rolled material is large and burrs remain at the corner portion, it is also possible to use a full-size bite, and when the rolled material is wide, a large bite that covers the entire width of the rolled material. When it is difficult to integrally mold the burrs, it is possible to remove the burrs by arranging two or more cutting tools on the same line.

If there is not enough space in the rolling direction to install a deburring device between the rolled material joining device and the rough rolling mill, as shown in FIG. By disposing the blades (3a to 3d) at the same position in the longitudinal direction of the rolled material, it is possible to save the space of the deburring device in the rolling direction. In this case, since the cutting tool is inclined in the present invention, FIG.
(B) As shown in FIG. 8 (c), adjacent bytes do not interfere with each other, and it is also possible to adopt a full-type byte for removing burrs at corners.

Next, an easily detachable deburring device according to the present invention will be described with reference to FIGS. As a deburring tool, a cutting tool blade 3 or a grinder can be used. Here, a case where the cutting tool blade 3 is used will be described.

In order to remove burrs on the four surfaces of the billet, it is preferable to dispose the cutting tool blades (3a, 3b) disposed on the two opposing surfaces on one unit frame 9. When a unit frame 9 is prepared for each blade 3 of each cutting tool, four unit frames are required. In addition, if the four-sided cutting blade is arranged on one unit frame, a unit frame having a large area will be obtained. As shown in FIG. 5, the unit frame 9 has an elongated shape, so that the guide surface 11 of the deburring frame 10 slides and can be easily attached and detached.

When a pair of cutting blades 3a and 3b are provided on one unit frame 9, a pair of tool stands 7 are provided on the unit frame 9 as shown in FIG. The rolled material 1 can pass between the tool tables. A tool blade 3 is attached to each tool stand 7. In order to deburr four surfaces of the billet, two sets of unit frames 9 are applied, and the two sets are installed at an angle of 90 ° to each other. In FIG. 4A, this is indicated by a unit frame 9 and a unit frame 9b (not shown).

The tool table 7 is slidable and movable on the unit frame 9, and can change the distance from the rolled material 1. A moving device 8 for moving the tool stand 7 is provided on the unit frame 9. The driving method of the moving device 8 can be selected from an air cylinder, a hydraulic cylinder, an electric motor, and the like. During normal rolling of the rolled material 1, the distance between the tool stand 7 and the rolled material 1 is increased to keep the bite 3 of the cutting tool away from the surface of the rolled material 1, and the burrs 4 at the joint of the rolled material are removed. At the time, the tool table 7 is
, The tool blade 3 of the cutting tool is brought close to the surface of the rolled material 1,
Deburr is performed.

The deburring device is disposed between the joining device of the rolling line and the rough rolling mill. The deburring frame 10 is provided on the rolling line, and the unit frame 9 is fixed to the deburring frame 10, whereby the deburring device is incorporated into the rolling line. As a preferred method of fixing the unit frame 9 to the deburring frame 10, a guide surface 11 is provided on the deburring frame 10, and the unit frame 9 slides on the guide surface 11 to detachably attach to the deburring frame 10. Do. As shown in FIG.
The unit frame 9 on which the cutting tool 3 has been mounted and adjusted off-line is lifted up by a crane or the like by the lifting tool 12, and the guide surface 11 of the deburring frame 10 is slid to incorporate the unit frame 9 into the deburring frame 10. After the assembly is completed, the unit frame 9 is fixed to the deburring frame 10 by using a method such as bolting or hydraulic clamping to complete the adjustment of the deburring device.

The cutting tool 3 having a good cutting edge is attached to the spare unit frame 9 in advance to complete the adjustment. In the case where the blade of the cutting tool of the deburring device installed on the rolling line has a problem, the unit frame 9 on the rolling line is removed, and the spare unit frame 9 which has been adjusted is mounted on the deburring frame 10 on the rolling line. This completes the adjustment of the cutting blade.

If the attachment and detachment and adjustment of the cutting tool blade 3 are performed on the rolling line as in the conventional method, it is necessary to suspend the rolling equipment for a very long time. In the present invention, since the attachment and detachment of the tool bit is completed by the attachment and detachment of one unit, the adjustment of the tool blade on the rolling line with poor workability becomes unnecessary, and the time required for attachment and detachment and adjustment is extremely short. Becomes

As shown in FIG. 6, the positions of the pair of cutting blades 3 on one unit frame 9 can be shifted from each other in the rolling direction. This causes a shift in the timing at which the blade 3 of each cutting tool removes burrs, so that the force applied to the unit frame 9 during the removal of burrs can be dispersed, and the load on the unit frame 9 can be reduced.

In multi-strand rolling in which a plurality of billets are simultaneously rolled in parallel, deburring devices are also arranged in a number equal to the number of strands. In the present invention, FIG.
One pair of deburring tools is used for each strand as shown in
It can be arranged on a single unit frame 9. Thus, even in a multi-strand rolling facility, it is sufficient to dispose two unit frames of the deburring apparatus.

[0032]

EXAMPLE The present invention was carried out in continuous rolling of a steel wire rod. As a rolled material, a billet of 122 mm square × 18 m length was used. Flash butt welding was used to join the end faces of the rolled material extracted from the heating furnace. The two billets to be joined are gripped by a gripping device also serving as an electrode, and then flash butt welding is performed. Short circuit current between electrodes 5-10A
/ Mm ² , no-load voltage between the electrodes is 5 to 30 V, platen moving speed is 1 to 5 mm / sec, and bonding surface pressure is 2 kg / m.
It adopted the conditions that m ² or more.

The deburring device shown in FIGS. 4 and 5 is adopted and disposed between the above-mentioned joining device and the rough rolling mill. In order to remove burrs on the four surfaces of the rolled material, the blades of the cutting tool are arranged on each surface of the rolled material as shown in FIG. The cutting blades (3a, 3b) arranged on the two opposing surfaces were arranged on one unit frame 9, and were slightly displaced in the rolling longitudinal direction. In addition, the tool blades (3c, 3d) arranged on two adjacent surfaces
Was mounted on another unit frame 9 and shifted in the rolling longitudinal direction. At the time of deburring, the cutting blade 3 is fixedly arranged along the surface of the rolled material, and the burr 4 is cut and removed as the rolled material 1 moves along with the rolling. Rolled material 1
Is 0.1 m / sec.

The blade 3 of the cutting tool was arranged at an angle of 30 ° with respect to the joining surface 5. Also, as the material of the cutting blade 3,
The cemented carbide mainly composed of WC was used.

Flash 4 generated by flash butt welding
Had a height of about 14 mm and a width of about 50 mm. The burrs 4 were removed by the deburring apparatus of the present invention. At the time of deburring, the rolling load required for deburring was about 5% of the normal rolling. The value was sufficiently small to prevent breakage of the cutting blade 3, prevent escape between the cutting blade 3 and the surface of the rolled material 1, and prevent adverse effects on rolling.

After the burrs were removed, the burrs were sufficiently and sufficiently removed, and there was no sag on the surface of the steel material. Therefore, no flaw was generated on the surface of the steel material after rolling.

When the need for replacement of the cutting blade 3 arises, the maintenance can be performed very quickly by replacing the spare unit frame 9 with the completed maintenance.

As a comparative example, as shown in FIG. 3, deburring was performed by disposing the cutting blade 3 in parallel with the joining surface 5. The cutting blade 3 was directly attached to a deburring device on a rolling line. Since the force applied to the bite blade was too large, the bite blade was broken, and the bite blade escaped from the surface of the rolled material, so that burrs could not be sufficiently removed. After the removal of burrs, sagging remained on the steel material surface, and flaws were generated on the steel material surface after rolling. In addition, since adjustment and replacement of the cutting blade are performed on a rolling line, workability is poor, and replacement requires a long time.

[0039]

According to the present invention, by inclining the blade of the deburring tool with respect to the joining surface, it is possible to prevent the tool from being damaged and prevent the tool from escaping from the surface of the rolled material.
Further, the force applied to the rolled material at the time of deburring can be reduced. Also, no sagging occurs on the rolled material surface after deburring.

By adopting the structure using the unit frame, the time required for changing the deburring tool is drastically reduced. In addition, since the mounting and adjustment of the deburring tool can be performed outside the rolling line, the rolling operation is not hindered. Furthermore, since the deburring tool can be mounted and adjusted in a place where workability is good, maintenance work efficiency is improved and highly accurate adjustment is possible.

[Brief description of the drawings]

FIG. 1 is a partial view showing a deburring apparatus of the present invention;
(A) is a figure which looked at the blade of the cutting tool from above, and (b) is a figure which looked at the blade of the cutting tool from the side.

FIG. 2 is a partial view showing a deburring apparatus of the present invention;
(A) shows the case where the direction of the inclination of the blades of the two opposing cutting tools is the same, and (b) shows the case where the direction of the inclination is reversed.

FIG. 3 is a partial view showing a conventional deburring apparatus.

FIG. 4 is a view showing a deburring apparatus of the present invention, and (a)
Is a view seen from the rolling direction, and FIG.

FIG. 5 is a diagram showing a replacement state of a unit frame in the deburring apparatus of the present invention.

FIG. 6 is a side view of a unit frame of the deburring apparatus of the present invention.

FIG. 7 is a schematic view showing a deburring apparatus of the present invention in a multi-strand rolling apparatus.

8A and 8B are views showing a deburring apparatus of the present invention in which the four-sided cutting tool blades are arranged at the same position, wherein FIG. 8A is a view seen from the rolling direction, and FIG. Figure, (c) is B
It is the schematic of the -B cross section.

[Explanation of symbols]

 1, 2 rolled material 3 bit blade (burr removal tool) 4 burr 5 joining surface 6 traveling direction of rolled material 7 tool table 8 moving device 9 unit frame 10 deburring frame 11 guide surface 12 hanging tool Angle of inclination between plane

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Yoshihisa Otsu 23-15 Suzukocho, Kamaishi City Nippon Steel Corporation Kamaishi Works (72) Inventor Toshiharu Obimu 23-15 Suzukocho, Kamaishi City Nippon Steel Corporation Inside Kamaishi Works (72) Inventor Masaki Kani 5-2 Sokai-cho, Niihama-shi, Ehime Japan F-term in Niihama Works, Sumitomo Heavy Industries, Ltd. 3C050 AD08 FB01 FB08 FB08 FB11

Claims (7)

[Claims] 1. After joining a preceding material and a succeeding material to be rolled by continuous rolling, removing a burr at a joining portion by tilting a blade of a deburring tool with respect to a joining surface to remove the burr. A deburring method for a joint portion, characterized in that: 2. The blade of the cutting tool is set at 20 ° to 4 ° with respect to the joining surface.
The method of claim 1, wherein the joint is deflected by 5 °. 3. A deburring device for removing burrs at a joint portion after joining a preceding material and a succeeding material to be rolled by continuous rolling, wherein a blade of a deburring tool is provided with respect to a joining surface. A deburring device having a slanted deburring tool. 4. The cutting edge of the cutting tool is 20 ° to 4 ° with respect to the joining surface.
The joint deburring device according to claim 3, wherein the device is inclined by 5 degrees. 5. A deburring apparatus for removing burrs at a joint portion after joining a preceding material and a following material to be rolled by continuous rolling, comprising: a deburring tool for removing burrs; A tool base for fixing a tool, a unit frame for movably installing the tool base, a moving device for moving the tool base on the unit frame, and a deburring frame for attaching the unit frame. Characteristic joint deburring device. 6. The deburring apparatus according to claim 5, wherein the unit frame is detachable by sliding on a guide surface of the deburring frame. 7. The deburring tool according to claim 5, wherein the deburring tool is a deburring tool, and a blade of the deburring tool is inclined with respect to a bonding surface. Taking device.