JP3143071B2 - Dowel surface cutting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dowel surface of a flow control upper nozzle or a dowel of a lower plate mounted on a tapping port of a tundish or ladle (hereinafter referred to as a molten metal storage pan) in a continuous casting apparatus. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dowel surface cutting device for cutting and cleaning a surface, and more particularly to a dowel surface cutting device provided with a cutter capable of excellently cutting a dowel surface.

[0002]

2. Description of the Related Art Generally, a tapping hole provided at the bottom of a molten metal storage pan such as a tundish or ladle is provided with:
An upper nozzle for controlling the amount of tapping of the molten metal is mounted, and a flow control device having a slide gate and an immersion nozzle (or a lower nozzle) is installed below the upper nozzle.

[0003] The structure of the molten metal storage pot will be described with reference to FIG. 9. The bottom 101 of the storage pan 100 is provided with a tapping port 102 for tapping molten metal.
2 is provided with a tuyere block 103 made of a refractory, such as a mass brick. And the tuyere block 10
An upper nozzle 105 is removably mounted in the mounting hole formed in the storage pan 3.
A refractory 106 having a slide gate and a lower nozzle or a submerged nozzle for controlling the amount of molten metal to be tapped is installed via a mechanical plate 107 below the metal plate.

A slide gate and a nozzle installed below the storage pan 100 are formed with heat and corrosion resistance.
It wears out significantly after each use and must be replaced frequently with new ones. At the time of this replacement, the dowel surface of the upper nozzle 105 in contact with the upper plate and the dowel surface of the lower plate (not shown) in contact with the lower nozzle are cut so that the nozzle and the plate are attached in close contact. , Cleaning work was done.

[0005]

However, the above-mentioned work for cutting and cleaning the dowel surface is generally performed manually, and has been performed using a bar, a hammer, a hand breaker, or the like. This work is heavy labor because it handles heavy objects for a long time in a high-temperature environment. Moreover, since the work is extremely dangerous and the work efficiency is low, improvement is required so that the work can be performed safely, reliably and in a short time. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and when exchanging a refractory provided below a storage pan, the dowel surface of the refractory is securely, reliably and shortened. An object of the present invention is to provide a dowel surface cutting device capable of cutting and cleaning in a short time, and particularly including a cutter capable of excellently cutting the dowel surface.

[0007]

In order to achieve the above object, a dowel surface cutting apparatus according to the present invention comprises a dowel surface or a lower nozzle of a flow control upper nozzle mounted on a tapping port of a molten metal storage pan. A dowel surface cutting device for cutting and cleaning the dowel surface of a plate, comprising a cutter for cutting the dowel surface of the upper nozzle for flow control or the dowel surface of the lower plate, and a drive mechanism for rotating the cutter, wherein the cutting of the cutter is performed. A plurality of cutting edge tips are held on the surface at predetermined intervals, and the cutting edge tips extend from a main cutting edge of the cutting edge tip, a center of a main flank and a cutting surface of the cutter. The basic configuration is that the cutter is attached to the cutting surface of the cutter at an angle of 12 to 17 degrees in the rotational direction of the cutter with respect to the center line connecting the centers.

Further, the dowel surface cutting device according to the present invention comprises:
A dowel surface cutting device for cutting and cleaning the dowel surface of the upper nozzle for flow control or the dowel surface of the lower plate attached to the tapping port of the molten metal storage pan, wherein the dowel surface or lower plate of the upper nozzle for flow control is provided. A cutter for cutting the dowel surface and a drive mechanism for rotating the cutter,
A plurality of cutting edge tips are held at predetermined intervals on the cutting surface of the cutter, and the cutting edge tip has an angle β between the dowel surface and the rake face of the cutting edge tip of 92 to 97 degrees. And the cutter is basically mounted on the cutting surface of the cutter.

Further, in the dowel surface cutting device for cutting and cleaning the dowel surface of the upper nozzle for flow control or the dowel surface of the lower plate attached to the tapping port of the molten metal storage pan, A cutter for cutting the dowel surface or the dowel surface of the lower plate, and a drive mechanism for rotating the cutter, wherein a plurality of cutting edge chips are held at predetermined intervals on the cutting surface of the cutter, The tip is an extension of the main cutting edge of the cutting edge tip,
The angle between the center of the main flank and the center line connecting the center of the cutting surface of the cutter has an angle of 12 to 17 degrees in the direction of rotation of the cutter, and the angle between the dowel surface and the rake face of the cutting tip is formed. The basic configuration is that the cutter is attached to the cutting surface of the cutter with an angle β of 92 to 97 degrees.

[0010]

In the dowel surface cutting device according to the present invention, the cutting blade tip cuts mortar or molten steel residue adhered to the dowel surface by rotating the cutter by a driving mechanism. At this time, the angle formed by the extension line of the main cutting edge of the cutting edge tip and the center line connecting the center of the main flank and the center of the cutting surface of the cutter is 12 in the direction of rotation of the cutter. Since it is attached at an angle of from 17 degrees to 17 degrees, cutting chips such as mortar and molten steel residue adhering to the dowel surface (end surface) can be extruded into the inside of the cutter, and can be cut reliably.

In addition, since the cutting edge tip is attached to the cutting surface of the cutter at an angle β between the dowel surface and the rake face of the cutting edge of 92 to 97 degrees, the object to be cut becomes thin. Even if the object to be cut is not crushed by the cutting blade, complete cutting can be performed.

Therefore, according to the present invention, even in the case of dangerous heavy work such as handling heavy objects for a long time in a high temperature environment, even in a hot state, an automated dowel surface cutting device can be used without manual operation. Cutting and cleaning of the dowel surface can be performed safely, reliably and in a short time.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a partially cutaway side view of the dowel surface cutting device according to the present invention, FIG. 2 is a front view of the dowel surface cutting device shown in FIG. 1 excluding the cutter, and FIG. FIG. 4 is a front view showing a part of the cutter of the dowel surface cutting device, showing a state in which the cutter of the surface cutting device is removed, FIG. 4 is a front view showing the cutter of the dowel surface cutting device, FIG. FIG. 7 is a schematic perspective view, and FIG. 7 is a view showing a mounted state of the cutting blade tip.

As shown in the drawing, an upper nozzle 4 is provided in a tuyere block 3 made of a mass brick or the like at the tapping port 2 of the storage pan 1. In this embodiment, an upper plate of the slide gate is used.
The case of cutting and cleaning the dowel surface of the upper nozzle 4 in contact with the upper nozzle 4 will be described. First, the dowel surface cutting device 10 according to the present invention
The outline of this will be described.
Is a detection mechanism 13 for detecting a relative position between a dowel surface of the upper nozzle 4 attached to the tapping port 2 and a mounting table 19 described later.
A first slide mechanism 11 for moving the mounting plate 25 on which the chip cover 28 is mounted, a driving mechanism 15 for rotating a cutter 14 for cutting the dowel surface, and the cutter 14 and the driving mechanism 15 are mounted. And the second slide mechanism 12 for moving the mounting plate 33 forward and backward.

In the dowel surface cutting device 10 thus configured, first, the dowel surface cutting device 10 (mounting base 19) is moved by the robot arm 17, and the detection mechanism 1 is moved.
3, the relative position with respect to the mechanical plate 5 is detected. After confirming that the dowel surface cutting device 10 is set at a predetermined position, the mounting plate 25 is advanced by the first slide mechanism 11 to bring the chip cover 28 into contact with the mechanical plate 5. Subsequently, the mounting plate 33 is advanced by the second slide mechanism 12 while rotating the cutter 14, so that the cutter 14 can cut and clean a specified dowel surface.

Next, the detection mechanism 13 constituting the dowel surface cutting device 10 will be described in detail. The detection bar 16 of the detection mechanism 13 is connected to a robot arm tip 1 (not shown).
The detection bar 16 is slidably attached to the front lower end of a mounting base 19 mounted on the base 7 via an auto tool changer 18, and the detection bar 16 is constantly urged forward by a spring 20. When the tip of the detection bar 16 comes into contact with the end face of the mechanical plate 5 and is pushed in, the stopper 21 fixed in the middle of the detection bar 16 has the limit switch 2 installed on the mounting base 19 side.
2, the limit switch 22 is closed to detect that the mount 19 is located at a predetermined position.

The first slide mechanism 11 will be described in detail. The first slide mechanism 11 includes a plurality of linear slide bearings 23 fixed to a lower portion of a mounting base 19 and the linear slide bearings 23 formed on an upper surface of a mounting plate 25. And a bracket 26 fixed to the mounting base 19, one end of which is connected to a cylinder rod 26 a of the cylinder 26, and the other end of which is connected to an upper surface of the mounting plate 25. Have been.

A cutter 14 is provided at the front end of the mounting plate 25.
A chip cover 28 covering the entire circumference of the chip 2 is fixed, and the operation of the cylinder 26 causes the mounting plate 25 to move forward and backward, and the chip cover 2
8 moves forward and backward. The cylinder 2
Numeral 6 is adapted to operate in response to an output signal from the limit switch 22 of the detection mechanism 13.

A discharge hole 28a is provided below the chip cover 28 which covers the entire circumference of the cutter 14.
A discharge pipe 29 connected to the discharge hole 28a is connected to a vacuum device (not shown) so that shavings cut by the cutter 14 are discharged to the outside.

Next, the second slide mechanism 12 will be described in detail. The second slide mechanism 12 includes a plurality of linear slide bearings 31 fixed to an upper portion of a mounting plate 33, a guide rail 32 formed below the mounting plate 33 and guided by the linear slide bearing 31, It comprises a cylinder 34 fixed to the rear end, and a bracket 35 connected at one end to a cylinder rod 34 a of the cylinder 34 and at the other end to a mounting plate 33. The mounting plate 33 is advanced and retracted by the operation of the cylinder 34, and the cutter 1 attached to the tip of the mounting plate 33 is moved.
4 can advance and retreat.

A stopper pin 30 is fixed to the front end of the mounting plate 33, and the stopper pin 30 comes into contact with the rear surface of the chip cover 28 so that the mounting plate 3
3 is prevented, and the mounting plate 33 can be stopped.

The drive mechanism 15 will be described in more detail. The drive mechanism 15 includes a spindle head 36 fixed to a lower portion of the mounting plate 33, a spindle 38 rotatably mounted on the spindle head 36 via a bearing 37, and Cutter 14 attached to the tip of main shaft 38 to cut the dowel surface (end surface) of the upper nozzle
And a drive motor 39 attached to the rear end of the main shaft 38 for driving the cutter 14 to rotate, and a pair of gears 40 and 41 for transmitting a rotational force from the drive motor 39 to the cutter 14. The drive motor 39 may be an electric motor, but is preferably an air motor or a hydraulic motor.

Further, the cutter 14 will be described in detail.
As shown in FIGS. 4 and 5, the cutter 14 has a plurality of cutting blade tips 43 detachably mounted on the cutting surface 42 while maintaining a predetermined interval, and the cutter 14 rotates when the cutter 14 rotates. The cutting blade tip 43 is configured to be able to cut mortar, molten steel residue, and the like adhering to the dowel surface (end surface) of the upper nozzle 4.

As shown in FIG. 6, the cutting edge tip 43 has a rake face 43a, a main flank 43b, and a main cutting edge 43c which is an intersection of the rake face 43a and the main flank 43b. There is a sub cutting edge 43e which is an intersection line between the sub flank 43d and the main flank 43b.

The angle of the cutting edge tip 43 between the extension line A of the main cutting edge 43c and the center line L connecting the center of the main flank surface and the center of the cutting surface of the holder 42 on the cutting surface 42 of the cutter 14. α is approximately 1 in the rotation direction of the cutter 14.
It is arranged to be at 5 degrees. An outline of this state is shown in FIG.

Here, as shown in FIG. 8 (a), the angle α formed by the extension line A of the main cutting edge 43c and the center line L connecting the center of the main flank surface and the center of the cutting surface 42 of the cutter 14 is formed. When it is disposed so as to be θ ₁ degree in the direction opposite to the rotation direction of the cutter 14, the mortar and the residue of molten steel adhering to the dowel surface (end surface) are extruded outward (in the direction of the arrow in the drawing) and extended. It is impossible to perform reliable cutting. In particular, when the residue of the molten steel or the like is at a high temperature, this adverse effect appears remarkably.

If this angle α is an angle exceeding 0 degrees,
Chips such as mortar and molten steel residue adhering to the dowel surface (end surface) are pushed out to the inside of the cutter 14.
However, it was recognized that reliable cutting was performed when the rotation direction of the cutter 14 was 12 to 17 degrees.

As shown in FIG. 5, the rake angle γ of the cutting edge tip 43 (the angle between the straight line M perpendicular to the towel surface and the rake face) is 2 to 7 degrees. Is mounted on the cutting surface 42 of the cutter 14 as described above. That is, the cutting edge tip 43 is arranged such that the angle β between the dowel surface and the rake face of the cutting edge tip 43 is 92 degrees to 97 degrees. FIG. 7B schematically shows this state.

Here, as shown in FIG. 8B, when the rake angle γ is 0 degrees, that is, when the angle θ ₂ between the dowel surface and the cutting blade surface of the cutting edge 43 is 90 degrees, cutting is started. Immediately after, even though cutting can be performed, when the work becomes thin, the work is crushed by the cutting blade, and complete cutting cannot be performed. Therefore, when the angle β was changed variously and an experiment was performed on the cutting, it was recognized that reliable cutting was performed when the angle β was 92 to 97 degrees.

The operation of the dowel surface cutting device thus configured will be described with reference to FIG. First, after pouring all the molten metal in the molten metal storage pan 1 in the casting process, the molten metal storage pan 1 is tilted by 90 degrees, and the dowel surface cutting device 10 is attached to the upper nozzle 4 from the outside of the molten metal storage pan 1. Is moved by the robot arm 17 to the vicinity of the tapping port 2.

By this movement, when the detection bar 16 of the detection mechanism 13 comes into contact with the end face of the mechanical plate 5 and the detection bar 16 is further pushed in against the repulsive force of the spring 20, the detection bar 16 Fixed stopper 21
Contacts the limit switch 22 installed on the mounting base 19 side, and the limit switch 22 is closed.

Upon receiving the detection signal from the limit switch 22, the cylinder 26 operates and the cylinder 26
The mounting plate 25 connected to the cylinder rod 26a via the bracket 27 is moved forward. Since the chip cover 28 is attached to the front end of the mounting plate 25, the chip cover 28 moves with the movement of the mounting plate 25 forward and comes into contact with the end face of the mechanical plate 5. When the chip cover 28 comes into contact with the end face of the mechanical plate 5, the movement of the mounting plate 25 is prevented, and the mounting plate 25 stops.

Subsequently, the cutter 1 of the dowel surface cutting device 10
After confirming that 4 is set to the specified position,
While rotating the cutter 14 by the drive motor 39,
The cylinder 34 of the second slide mechanism 12 is operated to cut the dowel surface (end surface) of the upper nozzle 4 while moving the cutter 14 attached to the attachment plate 33 forward. At this time, the cutter 14 rotates at 100 to 300 rpm.

During the cutting operation, the cutting surface 4 of the cutter 14
The cutting chips cut by the cutting edge tip 43 disposed at a predetermined position at the angles α and β described above on the
Is discharged to the outside via a discharge pipe 29 connected to a discharge hole 28a below the chip cover 28 covering the entire periphery of the chip cover 28, and the dowel surface is also cleaned at the same time.

Here, when the cutter 14 moves forward while cutting, and cuts to a preset depth, that is, when the cutter pin 28 is fixed to the rear surface of the chip cover 28 and the front end of the mounting plate 25, When the abutment 30 comes into contact, the mounting plate 25 and the cutter 14 cannot move forward any more, so that the dowel surface cannot be cut and the cutting operation ends. After the end of the cutting operation, in order to return the apparatus to a so-called initial state, an end signal is sent by the operator to the cylinder 1
2, 34, etc., the mounting plates 25, 33
May be moved backward (the position in the initial state), or a cutting operation end signal may be automatically output.

In this embodiment, the case where the dowel surface of the upper nozzle 4 in contact with the upper plate is cut and cleaned has been described, but the dowel surface of the lower plate (not shown) of the slide gate in contact with the lower nozzle is described. Naturally, it can also be used for cutting and cleaning.

[0037]

As described in detail above, the dowel surface cutting device according to the present invention connects the extension of the main cutting edge of the cutting edge tip, the center of the main flank and the center of the cutting surface of the cutter. Since the cutting edge tip is attached to the cutting surface of the cutter so that the angle formed by the center line has an angle of 12 to 17 degrees in the rotation direction of the cutter, it is attached to the dowel surface (end surface). Cutting chips such as mortar and molten steel residue can be pushed into the inside of the cutter, so that cutting can be reliably performed.

Further, the dowel surface cutting device according to the present invention comprises:
The cutting edge tip is mounted on the cutting surface of the cutter such that the angle β between the dowel surface and the rake face of the cutting edge has a value of 92 to 97 degrees. Complete cutting can be performed without the cutting object being crushed by the cutting blade.

As described above, according to the present invention, even in the case of dangerous heavy work such as handling heavy objects for a long time in a high-temperature environment, the automatic dowel surface cutting device can be used without any manual operation. Even in the intermediate state, cutting and cleaning of the dowel surface can be performed safely, reliably, and in a short time.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view of a dowel surface cutting device according to the present invention.

FIG. 2 is a front view of the dowel surface cutting device shown in FIG. 1 excluding a cutter in the dowel surface cutting device.

3 is a partially cutaway front view showing a state where a cutter of the dowel surface cutting device shown in FIG. 1 is removed.

FIG. 4 is a front view showing a cutter of the dowel surface cutting device.

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a schematic perspective view of a cutting blade tip.

FIG. 7 is a diagram showing an attached state of a cutting blade tip.

FIG. 8 is a view showing an unfavorably attached state of the cutting blade tip.

FIG. 9 is a cross-sectional view showing a general structure of a molten metal storage pot.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Molten metal storage pot 2 Steel tap 5 Mechanical plate 10 Dowel surface cutting device 11 1st slide mechanism 12 2nd slide mechanism 13 Detection mechanism 14 Cutter 15 Drive device 16 Detection bar 25 Mounting plate 28 Cutting bar 33 Mounting plate 38 Main shaft 42 Cutting surface of cutter 43 Cutting edge tip

Continued on the front page (72) Inventor Hideki Igarashi 378 Ogunimachi, Ogunimachi, Nishiokitama-gun, Nishiokitama-gun, Yamagata Prefecture Inside the Oguni Plant (72) Inventor Yoshikazu Kubo 1850 Minato, Wakayama-shi, Wakayama Sumitomo Metal Industries Wakayama Inside the steelworks (72) Inventor Satoshi Kawahito 1850 Minato, Wakayama-shi, Wakayama Prefecture Sumitomo Metal Industries, Ltd.Wakayama Steelworks (72) Inventor Shinnotake Shintake 4-5-33 Kitahama, Chuo-ku, Osaka-shi, Osaka Sumitomo Metal (56) References JP-A-7-242918 (JP, A) JP-A-7-77392 (JP, A) JP-A-6-320258 (JP, A) JP-A-6-154965 (JP) JP-A-6-63730 (JP, A) JP-A-4-66268 (JP, A) JP-A-8-318365 (JP, A) JP-A-6-234064 (JP, A) 63-19965 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B22D 43/00 B22D 11/10 320 B23C 5/06 F27D 23/02

Claims (3)

(57) [Claims] 1. A dowel surface cutting device for cutting and cleaning a dowel surface of an upper nozzle for flow control or a dowel surface of a lower plate mounted on a tapping port of a molten metal storage pan, wherein the upper nozzle for flow control is A cutter for cutting the dowel surface or the dowel surface of the lower plate, and a drive mechanism for rotating the cutter, wherein a plurality of cutting blade tips are held at predetermined intervals on the cutting surface of the cutter, and The angle between the extension line of the main cutting edge of the cutting edge tip and the center line connecting the center of the main flank and the center of the cutting surface of the cutter is 12 to 17 degrees in the rotation direction of the cutter. A dowel surface cutting device, which is attached to a cutting surface of the cutter at an angle. 2. A dowel surface cutting device for cutting and cleaning a dowel surface of an upper nozzle for flow control or a dowel surface of a lower plate attached to a tapping port of a molten metal storage pan, wherein the upper nozzle for flow control is A cutter for cutting the dowel surface or the dowel surface of the lower plate, and a drive mechanism for rotating the cutter, wherein a plurality of cutting blade tips are held at predetermined intervals on the cutting surface of the cutter; The dowel surface cutting device, wherein the tip is attached to the cutting surface of the cutter at an angle β between the dowel surface and the rake face of the cutting edge tip of 92 to 97 degrees. 3. A dowel surface cutting device for cutting and cleaning a dowel surface of an upper nozzle for flow control or a dowel surface of a lower plate attached to a tapping port of a molten metal storage pan, wherein the upper nozzle for flow control is A cutter for cutting the dowel surface or the dowel surface of the lower plate, and a drive mechanism for rotating the cutter, wherein a plurality of cutting blade tips are held at predetermined intervals on the cutting surface of the cutter, and The angle between the extension line of the main cutting edge of the cutting edge tip and the center line connecting the center of the main flank and the center of the cutting surface of the cutter is 12 to 17 degrees in the rotation direction of the cutter. The dowel surface cutting device, wherein the dowel surface cutting device is attached to the cutting surface of the cutter at an angle and an angle between the dowel surface and the rake surface of the cutting edge tip of 92 to 97 degrees.