JPH0966451A - Running deburring device for round billet welded part - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remove continuously and with high efficiency burrs at a welded part for billet which has been subjected to flush butt welding in continuous rolling for round billets. SOLUTION: A revolving ring 12 rotatably-supported by a supporting roller 20 is fitted on a running machine body 11, and a plurality of grinders 13 are supported on the revolving ring so as to move in the radial direction through a sliding base. The grinder is so constructed as to move in the radial direction with a hydraulic cylinder 14. A grinder 15 is set diagonally to the center line of a round billet 1, and a sensor for detecting a billet welded part 2 is fitted on the upstream side to take grinding timing. A dust collecting hood whose inside is formed with a water spraying nozzle is mounted on the downstream side to collect and recover slag generated during deburring work.

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 running deburring used in continuous rolling of round billets, and more particularly, to a welding portion produced during flash butt welding of continuously cast round billets during running. The present invention relates to a running deburring device that removes a raised portion (burr) with a grinder.

[0002]

2. Description of the Related Art In continuous rolling of continuously cast billets, billets are continuously connected by flash butt welding by a running flash butt welding device, and burrs of welds generated at that time are removed by a bite or the like. The deburring device is known (Japanese Patent Laid-Open No. 52-43754, Japanese Patent Publication No. 57-11722). However, since this deburring device is for a square billet, it uses a general-purpose tool and the like, which causes a problem that the tool is heavily worn. On the other hand, as for round steel, for example, Japanese Patent Laid-Open No.
In JP-20492, a plurality of grinders are used,
These grinders are swiveled around the round steel to remove burrs. However, this deburring device is designed to be inserted laterally into the round steel. Therefore, one of the plurality of grinders can be opened and closed by an arm, and the other grinders are fixed. . Therefore, when the grinder is worn, the center of the grinding circle will be displaced from the center of the round steel, and the rotation axis of the grinder is parallel to the axis of the round steel.
There is a problem that it is difficult to continuously deburr online because the grinding powder noro flies in a direction perpendicular to the round steel, and the grinder is sloppy and dust is difficult to collect. .

[0003]

The use of a grinder to remove burrs in flash butt welds has the following disadvantages:
For continuous billet rolling, this is the most suitable method. The reason is that the deburring time is very short, and a constant sharpness can be maintained for a long period of time even if the grindstone wears as a feature of grindstone grinding. The problem is that burrs in the billet welds that flow continuously must be removed one after another while traveling online, and since a large amount of grinding powder scatters as sparks during burr grinding, this kind of slag There are things that need to be done properly, and be able to respond quickly to changes in billet size. None of the above publications provide an effective solution to such a problem.

The present invention solves these problems, and provides a running deburring device capable of continuously and efficiently grinding the burrs of a round billet weld using a grinder in the continuous rolling of round billets. It is an object.

[0005]

In order to solve the above problems, a running deburring device for a round billet welded portion according to the present invention is provided with a traveling machine body that reciprocates in the billet moving direction, and is rotatable with respect to the traveling machine body. A supporting swivel ring, a plurality of grinder devices arranged so as to be movable in a radial direction of the swivel ring, and a grinder of the grinder device set obliquely with respect to a central axis of the swivel ring. It is characterized by.

When the round billet welded portion enters into the device, the traveling machine body starts traveling in the billet moving direction and the plurality of grinder devices are rotationally driven, respectively.
Preset the grinder by moving it to the central axis of the swivel ring, and when the round billet weld reaches directly under the grinder, swivel the grinder device by the swivel ring to eliminate burrs on the round billet weld between runs. can do. Since the grinder is set diagonally to the center axis of the swivel ring, that is, the center axis of the round billet, burrs can be widely ground even if the grinder has a relatively thin thickness, and slags are scattered. It is possible to limit the direction to be slanted from the central axis of the round billet, so that it is easy to collect dust. In this way, after removing the burr of one weld,
The traveling body returns to its original position and prepares for the next weld. Therefore, it is possible to successively remove the burrs of the weld portion that continuously flow online.

Since a large amount of slag scatters during grinding of burrs, a hood for collecting the burrs is provided. This dust collecting hood is provided with a water spray nozzle on its inner surface, and can separate and collect the slag without scattering it around.

Further, a sensor for detecting the billet welded portion is provided on the upstream side of the grinder device, and deburring timing is set.

[0009]

1 is a front view showing a structural example of a running deburring apparatus of the present invention, and FIG. 2 is a side view thereof. This running deburring device 10 includes a turning ring 1 on a traveling body 11.
2 are provided, and the three grinder devices 13 that are independently driven to rotate on the orbiting ring 12 are provided with the hydraulic cylinder 1
4 is provided so as to be movable in the radial direction of the turning ring 12. As shown in FIG. 3, each grinder 15 is inclined at a predetermined angle with respect to the central axis of the round billet 1. Due to such inclination, even if the grinder is relatively thin, the burr 3 of the welded portion 2 is formed. Can be widely ground. Further, since the scattering direction of the slag 4 is oblique to the central axis of the round billet 1, the slag 4 can be easily separated and collected.

The traveling machine body 11 is adapted to reciprocate on a rail 16 laid in the billet moving direction with a predetermined stroke. Reference numeral 17 is a traveling drive servomotor, and a pinion 18 provided on the motor output shaft is attached to the rail 1
The rack 19 provided on the side surface of 6 is driven by being engaged with the rack 19.

The lower part of the slewing ring 12 composed of a frame is rotatably supported on the traveling machine body 11 by a supporting roller 20, and the rear part thereof is rotatably supported by a vertical frame 21 standing on the traveling machine body 11. ing. A turning drive motor 22 is provided on the vertical frame 21, and a pinion 23 provided on an output shaft thereof is meshed with a ring gear 24 on a rear portion of the turning ring 12 to rotate the turning ring 12 around a central axis of the round billet 1. I try to make it. In addition,
The billet 1 is continuously connected by a running flash butt welding device (not shown) in the preceding stage.

A plurality of grinder devices 13 that are independently driven to rotate are installed on a support 25, respectively.
Each support base 25 is slidably supported on the front surface of the swivel ring 12 via a slide base 26 in the radial direction, and
6 and the orbiting ring 12 are connected by a moving hydraulic cylinder 14, and the grinder 15 is moved in the radial direction of the orbiting ring 12 so that it can be displaced concentrically with respect to the central axis of the round billet 1. Grinder 15
Is rotated by a belt 28 by a grindstone driving motor 27 installed on a support 25.

A bead detection sensor 30 is provided on the upstream side of the grinder 15, and the billet welded portion 2 is detected by this sensor 30. Further, a dust collecting hood 31 is provided on the downstream side of the grinder 15, and a plurality of water spray nozzles 32 are provided on the inner surface of the hood 31. By the water sprayed from the hood 31 and the water spray nozzle 32, the sparks of the grinding powder at the time of burr grinding are cooled and dust is collected, and the slag 4 is discharged from the drain pipe 33 to a drain groove or the like. In the figure, 34 is a support roll for the continuous billet 1, which is adapted to descend when the welded portion 2 passes through. This lifting means is not shown. 3
5 is a heat insulating hood.

A running deburring apparatus 1 configured as described above
0 is arranged, for example, as a part of the continuous rolling equipment for round billets as shown in FIG. Figure 4 shows HDR (Hot Di
The outline of a continuous rolling facility of the type (abbreviation of rectRolling) is shown. In the figure, 40 is a continuous casting machine, and in this example, it is shown as a two-strand continuous casting machine. Reference numeral 50 is a turntable installed on the base end side of the connection line 1b of the round billet 1, and the billet 1 transferred during the rotation is shifted to the center line 51. Reference numeral 60 is a scale removing device for removing the scale of the billet 1 by, for example, spraying high-pressure water, and 70 is a predetermined stroke S.
In the running flash butt welding device that reciprocates 1, the running deburring device 10 of the present invention is installed next to the welding device 4. Reference numeral 80 is an induction heating device for heating the continuous billet after deburring to a predetermined temperature, and 90 is a rolling mill train including a large number of rolling mill stands constituting a rolling line. In the figure, 1a is a casting line and 1c is a rolling line. The connection line 1b of the billet 1 and the rolling line 1c are connected in series. Reference numeral 52 is the center of rotation of the turntable 50, which coincides with the connection line 1b.

Next, the operation of the running deburring apparatus 10 will be described together with the operation of the HDR continuous rolling equipment. The round billets 1 continuously cast by the continuous casting machine 40 are transferred one by one onto the turntable 50, and while the turntable 50 is rotating, the billet 1 is shifted to the center line 51 so as to be aligned with the connection line 1b. After that, it is directly sent to the connection line 1b. This direct delivery billet 1 is
After removing the scale of the billet 1 by, for example, spraying high-pressure water in the scale removing device 60, the running buttocks bush butt welding device 70 makes the trailing end face of the leading billet and the leading end face of the trailing billet welded to each other in the running buttocks. Connect continuously. The state at the time of billet welding is such that the burr 3 is raised on the outer periphery as shown in FIG. The height H of the burr 3 is usually 7-1.
It is 5 mm. Therefore, even if such a burr 3 is rolled as it is, it will cause a flaw in the product. Therefore, in order to remove it, the burr 3 in the running deburring device 10 is quickly and successively deleted by using a grinder. There is.

That is, the position of the welded portion 2 is detected by the sensor 30.
, The deburring device 10 starts traveling downstream, the grinder 15 of the grinder device 13 starts to rotate, and the hydraulic cylinder 14 moves the grinder device 13 toward the billet center side to preset the grinding allowance. To do. Then, when the continuous billet 1 is conveyed further downstream and the billet welded portion 2 reaches just below the grinder 15, the drive current of the grindstone drive motor 27 rapidly increases, so that the welded portion 2 is reached. To detect. When the welded portion 2 reaches just below the grinder 15, the rotating grinder 15 is fixed at a preset position, and the grinder device 13 is swung around the continuous billet 1 by the swivel ring 12, whereby the circumferential direction of the continuous billet 1 is increased. The entire burr 3 is ground and removed.
Since the grinder 15 is set obliquely with respect to the center axis of the billet and swivels around the continuous billet 1, even if the grinder 15 is thin, the burr 3 can be widely removed. Further, since the scattering direction of the slag 4 can be limited to the oblique direction as shown in FIG. 3, the slag 4 can be easily collected. This deburring device 10
Performs deburring while traveling a predetermined stroke S2 shown in FIG. 4, and after deburring, returns to the original position and performs deburring operation for the next welded portion 2 in the same manner as above. In this way, the burr 3 of each weld 2 can be continuously removed online. The state after deburring is as shown in FIG. Since the welded portion 2 is also rolled, strict finishing is not necessary and rough finishing may be used.

Although a large amount of slag 4 is generated during burr grinding, since the dust collecting hood 31 is provided on the front surface of the grinder 15 and water is sprayed from the water spray nozzle 32 provided on the inner surface thereof. Since the Noro 4 can be cooled while collecting dust, and can be further discharged to the outside through the drainage pipe 33 and collected, the Noro 4 is not scattered around the apparatus 10.

Further, even if the size of the billet 1 is changed, the plurality of grinders 15 can be displaced concentrically, so that it is possible to quickly cope with it without requiring any special measures.

[0019]

As described above, the running deburring apparatus of the present invention can be used for a continuous billet formed by continuous casting, in a series of continuous rolling steps, in a welded portion of round billets continuously connected by flash butt welding. Since burrs are removed between runs by using a grinder, online deburring can be performed efficiently and continuously, and deburring time is short and can withstand long-term use. It is a thing. Since the grinder is set diagonally with respect to the center axis of the billet, deburring can be performed widely and the direction of splashing can be limited.
Easy to separate and collect dust. Since the dust collecting hood with the water spray nozzle is provided on the inner surface, it is possible to collect and collect dust without scattering slag during burr grinding.

[Brief description of drawings]

FIG. 1 is a front view of a running deburring device of the present invention.

FIG. 2 is a side view of the device.

FIG. 3 is an explanatory diagram showing a set state of the grinder.

FIG. 4 is a schematic diagram of HDR continuous rolling equipment for round billets.

FIG. 5 is a cross-sectional view showing a state before and after deburring of a billet weld.

[Explanation of symbols]

 1 Round billet 2 Welding part 3 Burr 4 Noro 10 Running deburring device 11 Traveling machine 12 Slewing ring 13 Grinder device 14 Hydraulic cylinder for movement 15 Grinder 17 Servo motor for traveling drive 20 Support roller 22 Motor for swiveling drive 25 Supporting base 26 Sliding table 27 Grindstone drive motor 30 Bead detection sensor 31 Dust collecting hood 32 Sprinkling nozzle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Okushima 1-2-1, Marunouchi, Chiyoda-ku, Tokyo Inside Nihon Kokan Co., Ltd. (72) Inventor Fuminosuke Ushioda 4-29-5, Taito, Taito-ku, Tokyo No. Nippon Sping Co., Ltd. (72) Inventor, Yuji Watanabe 4-29-5, Taito, Taito-ku, Tokyo Within Japan Sping Co., Ltd.

Claims (3)

[Claims] 1. A traveling machine body that reciprocates in a billet movement direction, a slewing ring rotatably supported by the traveling machine body, a plurality of grinder devices arranged to be movable in a radial direction of the slewing ring, A runner deburring device for a round billet welded part, comprising: the grinder of the grinder device set obliquely with respect to the central axis of the turning ring. 2. The running deburring device for a round billet welded portion according to claim 1, further comprising a dust collecting hood having an inner surface provided with a water spray nozzle. 3. The running deburring device for a round billet welded part according to claim 1, wherein a sensor for detecting a billet welded part is provided on the upstream side of the grinder device.