JP2937809B2 - 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 pot) in a continuous casting apparatus. The present invention relates to a dowel surface cutting device for cutting and cleaning a 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. 7. A tapping port 102 through which molten metal taps is provided at the bottom portion 101 of the storage pot 100.
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 with new ones frequently. 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 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.

[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. In a dowel surface cutting apparatus for cutting and cleaning a dowel surface of a plate, a mounting table attached to a moving means such as an arm of a robot, and a chip cover at a front end portion are mounted so as to be able to advance and retreat to the mounting table. A first mounting plate,
A first slide mechanism for moving the first mounting plate forward and backward with respect to the mounting table, 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 are mounted. A second mounting plate;
The basic configuration includes a second slide mechanism for moving the second mounting plate forward and backward with respect to the first mounting plate, and a detection mechanism for detecting a relative position between the dowel surface to be cut and the mounting base. I have.

Further, in 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, movement of an arm of a robot or the like. A mounting base attached to the means,
A first mounting plate provided with a chip cover at a front end thereof and attached to the mounting table so as to advance and retreat, a first slide mechanism for moving the first mounting plate toward and away from the mounting table, and a flow control device A second mounting plate on which a cutter for cutting the dowel surface of the upper nozzle or the dowel surface of the lower plate and a drive mechanism for rotating the cutter are mounted, and a stopper pin is mounted on a front end portion, and the second mounting plate And a second slide mechanism for advancing and retreating the first mounting plate with respect to the first mounting plate. When the stopper pin contacts the rear surface of the chip cover, the movement of the second mounting plate is stopped, and cutting by a cutter is performed. Is set to be a constant amount.

[0009]

In the dowel surface cutting apparatus according to the present invention, a mounting table attached to a moving means such as an arm of a robot is fixed to a predetermined position by a detection mechanism for detecting a relative position between the dowel surface to be cut and the mounting table. Stop in position. Then, in response to the signal from the detection mechanism, the first mounting plate having the chip cover is moved forward with respect to the mounting base by the first slide mechanism. The second mounting plate is moved forward and backward with respect to the first mounting plate by the second slide mechanism while rotating the cutter for cutting the dowel surface by the drive mechanism, and cuts a predetermined dowel surface.

Further, in the dowel surface cutting apparatus according to the present invention, a mounting table mounted on a moving means such as an arm of a robot is stopped at a predetermined position, and a first slide mechanism having a chip cover is provided. The second mounting plate is moved forward with respect to the first mounting plate by the second slide mechanism while the cutter for cutting the dowel surface is rotated by the drive mechanism while moving the mounting plate forward with respect to the mounting base. Move and cut the dowel surface. When the cutting amount exceeds a certain value, the stopper pin and the rear surface of the chip cover come into contact with each other, so that the movement of the second mounting plate is prevented, and further cutting cannot 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.

[0012]

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. 4 is a partially cutaway front view showing a state where 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. 5 is a sectional view of FIG. 4, and FIG. 6 is a side view of FIG. FIG.

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, a case will be described in which the dowel surface of the upper nozzle 4 in contact with the upper plate of the slide gate is cut and cleaned. First, the outline of the dowel surface cutting device 10 according to the present invention will be described.
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 base 19 described later;
A first slide mechanism 11 for moving a mounting plate 25 on which a chip cover 28 is mounted, and a cutter 1 for cutting a dowel surface
And a second slide mechanism 12 for moving the mounting plate 33 on which the cutter 14 and the driving mechanism 15 are mounted.

In the dowel surface cutting device 10 thus constructed, 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 of the dowel surface cutting device 10 will be described in detail.
The detection bar 16 is slidably attached to the lower front end of a mounting table 19 mounted on an automatic tool changer 7 via an auto tool changer 18. 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 backwards. 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.

As shown in FIGS. 4 to 6, the cutter 14 has a plurality of cutting blade tips 43 detachably mounted on a cutting surface of a holder 42 while maintaining a predetermined interval. Is rotated so that the cutting edge tip 43 can cut mortar, molten steel residue, and the like adhering to the dowel surface (end surface) of the upper nozzle 4. Further, the cutter 14 does not advance further when the stopper pin 30 installed at the front end of the mounting plate 33 comes into contact with the rear surface of the chip cover 28, and the cutting depth by the cutter 14 is limited. , Constant cutting is performed.

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, the detection bar 16 of the detection mechanism 13 comes into contact with the end face of the mechanical plate 5 and when 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.

In response to 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.

During the cutting operation, the cutting chips cut by the cutter 14 are discharged by a discharge pipe 29 connected to a discharge hole 28a below a chip cover 28 covering the entire circumference of the cutter 14.
, And is discharged outside, and the cleaning of the dowel surface is also performed at the same time.

Here, when the cutter 14 moves forward while cutting, and cuts to a predetermined depth, that is, the stopper pin 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. However, 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.

[0030]

As has been described in detail above, the dowel surface cutting apparatus according to the first and second aspects of the present invention has a robot arm.
A mounting base attached to a moving means such as a vehicle, a first mounting plate having a chip cover at a front end and mounted to be able to advance and retreat with respect to the mounting base, and moving the mounting plate toward and away from the mounting base. A second slide plate on which a first slide mechanism to be driven, 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 are mounted; and the second mount. A second slide mechanism for moving the plate forward and backward with respect to the first mounting plate; and a detection mechanism for detecting a relative position between the dowel surface to be cut and the mounting base, so that the dowel surface to be cut and the mounting A mounting mechanism attached to a moving means such as an arm of a robot can be stopped at a predetermined position by a detection mechanism for detecting a relative position with respect to the base, and a first slide mechanism having a chip cover having a chip cover is provided. One's take After the plate is moved forward with respect to the mounting table, the second mounting plate is advanced and retreated with respect to the first mounting plate by the second slide mechanism while rotating the cutter by the driving mechanism, and a predetermined dowel surface is formed. Can be cut.

The dowel surface cutting device according to claim 3 is
A stopper pin is attached to the front end of the second mounting plate, and the stopper pin is brought into contact with the rear surface of the chip cover to stop the movement of the second mounting plate. This has the effect of being able to be constant.

Further, the dowel surface cutting device according to claim 4 is a device for cutting mortar or molten steel residue generated during cutting / cleaning of a specified dowel surface while rotating the cutter to remove chips from the entire periphery of the cutter. Since the air is sucked and discharged to the outside without being scattered by the cover, the working environment is not contaminated.

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, the dowel surface can be cut and cleaned 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 sectional view of FIG. 4;

FIG. 6 is a side view of FIG. 4;

FIG. 7 is a sectional view showing a general structure of a molten metal storage pot.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 molten metal storage pan 2 tapping hole 5 mechanical plate 10 dowel surface cutting device 11 first slide mechanism 12 second slide mechanism 13 detection mechanism 14 cutter 15 drive device 16 detection bar 25 mounting plate 28 cutting bar 33 mounting plate B 38 Spindle

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akihiro Mizufoot 1 Minamito, Ogakie-cho, Kariya-shi, Aichi Prefecture Toshiba Ceramics Co., Ltd. (72) Inventor Kenichi Tsujimoto 1-Minamito, Ogakie-cho, Kariya-shi, Aichi Toshiba Ceramics Co., Ltd. (72) Inventor Yoshiken Kobayashi 1 Toshiba-cho, Fuchu-shi, Tokyo Toshiba Fuchu Plant Co., Ltd. (72) Yoshikazu Kubo 1850 Minato, Wakayama-shi, Wakayama Prefecture Wakayama Steel Works, Sumitomo Metal Industries, Ltd. 56) References JP-A-8-206820 (JP, A) JP-A-7-100633 (JP, A) JP-A-7-77392 (JP, A) JP-A-4-94863 (JP, A) 57-122766 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B22D 43/00 B22D 11/10 340 B22D 41/22 F27D 23/02

Claims (4)

(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 attached to a tapping port of a molten metal storage pan. A mounting table attached to the moving means, a first mounting plate provided with a chip cover at a front end so as to be capable of moving forward and backward with respect to the mounting table, and moving the first mounting plate forward and backward with respect to the mounting table; A second slide plate on which a first slide mechanism to be driven, 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 are mounted; and the second mount. A dowel surface cutting device comprising: a second slide mechanism for moving a plate forward and backward with respect to the first mounting plate; and a detection mechanism for detecting a relative position between the dowel surface to be cut and the mounting table. 2. The detecting mechanism comprises: a detecting bar slidably attached to a lower front end of a mounting base; a spring for urging the detecting bar to always extend forward; and the detecting bar includes a spring. And a limit switch for detecting that the pusher is pressed against the repulsive force of the reciprocating force, and wherein a relative position between the dowel surface to be cut and the mounting base is detected by the detection bar. The dowel surface cutting device according to claim 1. 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. A mounting table attached to the moving means, a first mounting plate provided with a chip cover at a front end so as to be capable of moving forward and backward with respect to the mounting table, and moving the first mounting plate forward and backward with respect to the mounting table; A second slide mechanism, which is provided with a first slide mechanism, 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, and a stopper pin attached to the front end. The mounting plate and the second mounting plate are connected to the first mounting plate.
A second slide mechanism for moving forward and backward with respect to the mounting plate, wherein the stopper pin and the rear surface of the chip cover are brought into contact with each other to stop the movement of the second mounting plate, and the cutting by the cutter is performed to a fixed amount. A dowel surface cutting device, characterized in that it is configured to be: 4. The dowel surface cutting device according to claim 1, wherein a discharge hole for discharging cutting chips cut by a cutter to the outside is formed in the chip cover.