JP2752566B2 - Positioning and fixing device of working machine to molten metal container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a working machine such as a cutting device, an oxygen cleaning device, an upper nozzle extracting device and an upper nozzle setting device for removing deposits on the inner surface of a nozzle brick of a molten metal container such as a tundish or a ladle. And a positioning and fixing device.

[0002]

2. Description of the Related Art At the bottom of a molten metal container such as a tundish or a ladle, a nozzle brick is provided and an insert nozzle for discharging molten metal is inserted. Since the insert nozzle is worn out due to its use, it is replaced. However, with this wear, a base metal or the like also adheres to the nozzle brick. In order to set a new insert nozzle, it is necessary to remove the deposit on the nozzle brick. The conventional method of the positioning and fixing device of the working machine for a cutting tool for removing the deposit will be described with reference to FIGS.

FIG. 8 is a view showing an example in which a work machine is positioned and then pressed against a mounting surface (a bottom iron skin or the like) of a molten metal container and mounted with a fixing bracket. As shown in FIG. 8A, a guide cylinder 2 is provided on the bottom iron skin of the molten metal 1, and FIG.
Are provided in three places as shown in FIG.
Is provided. On the other hand, fixed flanges 6 as shown in FIG. 8B are provided on both side surfaces of the working machine 4 having the cutting tool 5 attached to the distal end. When positioning and fixing the working machine, the positioning is performed by inserting the pin 7 into the guide tube 2, and then the working machine is pressed against the bottom steel and the fixing flange 6 is fixed with the fixing bracket 3.

For example, as shown in FIG. 8 (d), a pin 3b is provided between two legs of a U-shaped metal fitting 3a attached to a bottom steel, and the fixing metal fitting 3 has a rod-shaped screw. The bottom of 3c is rotatably fitted, and the nut 3d is screwed into the rod screw 3c.
Is turned upright as shown by an arrow, and stands upright with respect to the bottom steel bar. The tip of the fixing flange 6 is engaged with the rod-shaped screw, and the work machine is fixed by being clamped by the nut 3d. After the position is fixed in this manner, the cutting tool 5 is driven by the working machine 4 to remove the deposit on the inner surface of the nozzle brick.

FIG. 9 is a view showing an example in which the work is performed while the work machine is held by the mounting device without using the fixing device.
In this method, the working machine 4 is attached to the attachment device main body 8 via the floating mechanism 9. The position of the molten metal container 1 is not constant, and is generally shifted from the reference position by about ± 20 to 40 mm. Even if the position of the molten metal container is shifted, the work machine 4 needs to be positioned at a regular position with respect to the container 1. The position of the work machine is determined by inserting the pin 7 into the guide tube 2 fixed to the container. However, since the position of the mounting device main body 8 is usually constant, the positional shift between the work machine 4 and the mounting device main body 8 is determined. A floating mechanism 9 is provided for absorption. When the position of the container is displaced, the floating mechanism displaces the position of the pin according to the position of the container as the pin is inserted into the guide tube 2.
Since the mounting device 8 is at a fixed position, the mounting device 8 is a mechanism for absorbing the amount of displacement. With this method, as shown in FIG.
0 to 40 mm is allowed.

[0006]

The bottom shell of the molten metal container is repeatedly exposed to a temperature change from a high temperature of 300 to 400 ° C. to a room temperature, and thus gradually deforms. When the deformation occurs, the position of the guide cylinder fixed to the bottom iron skin is displaced. Therefore, if there is no floating mechanism as shown in FIG. 9, the pin cannot be inserted and cannot be used. Also, in order to be usable for a long time even if deformed, it is necessary to increase the play between the guide cylinder and the pin, and if this play is increased, the positioning accuracy is deteriorated. As shown in FIG. 11, the distance (entrance dimension) l between the guide cylinders in a normal state changes to l ₂ (l ₂ > l) when the bottom steel is deformed, and this dimension is changed to It is determined by the length H from the surface to the tip of the guide cylinder, and since the guide cylinder is mounted at a right angle to the bottom steel, the pin is shifted by a certain angle θ with respect to the axis of the pin with the deformation. Accordingly, in order to insert and position the pin even if there is a deviation of 2Δl ₂ = l ₂ −l and θ, as shown in FIGS. 12A and 12B, the inner diameter of the guide cylinder and the outer shape of the pin are required. In this case, a large play is required, and if the play is provided, the positioning accuracy is deteriorated in the case of a normal container. Also, when fixing the work machine to the container side, special fixing brackets are required.When working without holding the work machine and holding the work machine with the mounting device, the reaction machine Since external force needs to be received by the mounting device, the mounting device becomes large, and a complicated floating mechanism is required.
Maintenance costs will increase.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can perform positioning for a long time and accurately even if the bottom steel of a molten metal container is deformed, and does not require a dedicated fixing bracket, and It is an object of the present invention to provide a positioning and fixing device for a working machine with respect to a molten metal container, which can reduce the weight of a mounting device, its structure is simple and its maintenance cost can be reduced.

[0008]

An apparatus for positioning and fixing a working machine to a molten metal container according to the present invention is mounted on a bottom surface of the molten metal container and has an upper positioning metal fitting having a V-shaped cut groove above and an inverted U-shaped lower part. A work machine having a positioning metal fitting comprising at least two types of lower positioning metal fittings having a cut-shaped groove, a positioning arm engaging with the positioning metal fitting, and a locking mechanism provided on the positioning arm engaging with the lower positioning metal fitting. It is characterized by comprising a mounting frame to be mounted, and a mounting device for supporting the mounting frame so as to be able to move up and down so as to engage the positioning arm with the positioning metal fitting. Further, the mounting frame of the present invention has a support bracket having an inverted V-shaped cut groove formed at the bottom, and supports the cut frame of the support bracket by engaging the cut groove of the support bracket with an engaging pin provided on the mounting device. It is characterized by doing so. Further, the lock mechanism of the present invention is characterized in that it has a hook with a pin that engages with the inverted U-shaped cut groove of the lower positioning metal fitting. Further, the hook with pin according to the present invention is characterized in that it is connected to the end of the lock cylinder rod so as to be tiltable in contact with the guide roller. Further, the mounting device of the present invention is characterized by comprising an upper stage and a lower stage connected by four links, and a lifting cylinder installed between the upper stage and the lower stage.

[0009]

According to the present invention, the positioning metal fittings to be attached to the bottom iron skin are 3
A structure is prepared that can be positioned at a position close to the bottom steel so that it is hard to be affected by deformation of the bottom steel, and a mechanism that positions the work machine with movement close to parallel to the bottom steel. In addition, the positioning of the working machine to the container side after positioning can be shared by the positioning metal fittings, so that even if the bottom metal skin of the molten metal is deformed, long-term and accurate positioning can be performed. Can be easily attached and fixed to the container side, and the container can receive an external force such as a reaction force applied to the working machine. Therefore, the mounting device can be reduced in weight, the structure can be simplified, and the maintenance cost can be reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a view showing a cross section of a positioning and fixing device for a working machine according to the present invention, and FIG. 2 is a side view as viewed from the direction of arrow A in FIG. In the figure, 20 to 22 are positioning brackets, 30 is a work floor, 31 is a mounting device, 32 is a lower stage, 33
Is the upper stage, 34 is the link, 40 is the mounting frame, 4
1 is a support bracket, 42 is a linear bearing, 43 is a working machine, 44 is a reciprocating cylinder, 45 is a motor, 46
48 are positioning arms.

In the present invention, the working machine 43 is mounted on the mounting frame 40 via a linear hair ring 42 so as to be able to move forward and backward, and is moved on the linear bearing 42 by a moving cylinder 44 mounted on the mounting frame. I can do it. The cutting tool 5 is attached to the tip of the working machine 43, and is rotationally driven by a motor 45 by a chain drive. The mounting frame 40 is adapted to be engaged with and supported by the support pins 35 of the mounting device 31 by a support bracket 41 having an inverted V-shaped cut groove provided at the bottom thereof. The working machine may be an oxygen cleaning device, an upper nozzle extracting device, an upper nozzle setting device, or the like, in addition to the cutting and removing device.

Next, the positioning and fixing device will be described. The positioning and fixing device includes positioning metal fittings 20 to 22 to be attached to the molten metal container 1, a mounting frame 40 on which a working machine is mounted, and a mounting device 31 for mounting the mounting frame to the container. There are three types of positioning fittings, and two or more combinations can be used depending on the type of work machine. As shown in FIG. 3B, assuming that the bottom surface of the container is vertical, the bottom surface is an XY plane, and the axis perpendicular to the bottom surface is the Z axis, among the positioning fittings 20 to 22, the fitting 20 has the X axis, Positioning of Y-axis and Z-axis, bracket 21
Denotes a Z-axis and Y-axis positioning function, and the bracket 22 has a Z-axis positioning function. As shown in FIGS. 4 and 5, the positioning fitting 20 is a fitting fixed to the bottom iron skin of the container with a washer 20a and provided with a V-shaped cut groove. As shown in the figure, it is cut so as to be thin. The positioning arm 46 that engages with the positioning metal fitting 20 is attached to the tip of the mounting frame 40, and as shown in FIG.
b, a pin 46c is provided therebetween, and the lower side of the fork is cut so as to become thinner toward the tip. Bifurcation 46 of positioning arm 46
a, the allowable deviation amount is set to 20 to 40 mm by the inclined surface of the lower thin portion of the 46b and the upper thin portion of the positioning fitting 20,
The pin 46c is adapted to engage with the V-shaped cut groove of the positioning fitting 20. That is, the fork 46a, 46b of the positioning arm 46 and the upper inclined portion of the positioning bracket 20.
The pins are fitted while sliding with each other with the lower inclined portion to allow a shift amount.

The positioning metal fitting 21 is used for positioning the Z axis and for positioning the Y axis with a V-shaped groove, and is fixed to the bottom steel with a washer 21a. FIG. 6 (a)
As shown in FIG. 6, a V-shaped cut groove is provided in the positioning fitting 21, and a positioning arm 47 attached to the mounting frame 40 is engaged with the V-shaped cut groove as shown in FIG. That is, the positioning arm 47 has a bifurcated 47
a and 47b, between which a pin 47c is provided, which engages with a V-shaped cut groove of the positioning fitting 21. In this case, the positioning arm 47 and the positioning fitting 2
1 is made larger than that of the positioning fitting 20, so that positioning in the positioning fitting 20 can be easily performed.

The positioning fitting 22 is used for positioning the parallelism with respect to the Z-axis, particularly the steel shell on the bottom of the container, and for locking the mounting frame 40. As shown in FIG. 7, the positioning bracket 22 is provided with an inverted U-shaped cut groove, and the positioning arm 48 is attached to the lower end of the mounting frame 40 (FIG. 1). The hook 53 is rotatably mounted via a lock cylinder 50 and a link mechanism 52 driven by the lock cylinder 50 so as to be able to move forward and backward. The hook 53 is a guide roller 51
When the lock cylinder 50 is contracted while the distal end portion 48a of the lower positioning arm 48 is in contact with the positioning fitting 22, as shown by the arrow in FIG.
The hook 53 is pulled rearward on the guide roller 51 via 2 and pivots in the direction of the arrow, and the hook pin 53a is hooked on the inverted U-shaped cut groove of the positioning fitting 22 and locked. Therefore, the Z-axis direction is fixed by operating the lock cylinder 50 and the hook 53 is engaged with the cut groove, and at the same time, the distal end of the lower positioning arm 48 is brought into contact with the positioning fitting 22, so that the Z-axis positioning is performed. In particular, a degree of parallelism to the container bottom is obtained.

Next, the mounting frame will be described with reference to FIG. As described above, the mounting frame has the positioning arms 46 to 48 which engage with the positioning metal fittings on the container side, and the mounting bracket 31 is provided with the support bracket 41 for mounting thereon. At the center, a linear bearing 42 and an advance / retreat cylinder 44 for attaching and engaging a work machine 43 are provided. Also,
The positioning arm 48 is provided with a lock mechanism as described above as necessary.

The mounting frame can be supported simply by mounting it on the mounting device support pins by the support bracket.
The mounting device 31 connects the upper stage 33 and the lower stage 32 with four links 34, and a lifting cylinder 36.
By raising and lowering the upper stage, the horizontality of the upper stage is maintained, and the work machine can be positioned by a movement almost parallel to the bottom steel bar. The lower stage may be fixed to the work floor 30 or may be movable by casters, and the upper end surface of the upper stage is provided with the support pins 35 for mounting the mounting frame as described above.

Next, the procedure for attaching the working machine will be described. First, the molten metal container is tilted to make the bottom steel bar vertical. Next, the mounting device 31 is moved to a predetermined position and stopped. The mounting device may be fixed to the work floor. Next, the elevating cylinder 36 of the mounting device 31 is operated, and the positioning arms 46 to 48 of the mounting frame 40 are assigned to the positioning fittings 20 to 22. In that case, the work machine and the mounting frame can be engaged by the weight of the mounting frame. Next, the lifting cylinder 36 is operated until the support bracket of the mounting frame and the support pin of the mounting device are separated. The distal end surface of the lower positioning arm 48 comes into contact with the Z-axis upper end surface of the positioning fitting 22, and the lock mechanism is operated to contract the cylinder, thereby fixing the Z-axis direction.

In the present invention, as shown in FIG. 3 (a), the height of the positioning metal from the bottom steel is lower than that of the conventional one, so that the inlet dimension of the positioning metal is changed from l to l by deformation. _When it becomes ₁ , when 2Δl ₁ = l ₁ −l, Δl ₁ <Δl ₂ can be satisfied, and positioning can be performed accurately for a long time.

[0019]

As described above, according to the present invention, all the drawbacks of the conventional system are eliminated, the positioning accuracy is increased, the lock can be easily performed as required by a series of operations, and the positioning and fixing can be performed. Automation can be facilitated, the mounting device can be reduced in weight, the structure can be simple, and the maintenance cost can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a cross section of a position fixing device for a working machine according to the present invention.

FIG. 2 is a side view as seen from the direction of arrow A in FIG.

FIG. 3 is a view illustrating a positioning fitting of the present invention.

FIG. 4 is a view for explaining X-axis, Y-axis, and Z-axis positioning brackets.

FIG. 5 is a diagram illustrating an allowable displacement amount between a mounting bracket for X-axis, Y-axis, and Z-axis and a mounting arm.

FIG. 6 is a view for explaining Y-axis and Z-axis positioning hardware.

FIG. 7 is a diagram illustrating a Z-axis positioning bracket and a lock mechanism.

FIG. 8 is a diagram showing an example in which the work machine is attached with fixing brackets.

FIG. 9 is a diagram illustrating an example in which a work is performed while a work machine is held by a mounting device.

FIG. 10 is a diagram illustrating an allowable shift amount.

FIG. 11 is a diagram illustrating a change in an inlet size due to deformation of a container.

FIG. 12 is a diagram illustrating a positioning shift amount.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Molten metal container, 20-22 ... Positioning bracket, 30 ...
Work floor, 31: mounting device, 32: lower stage, 33
... upper stage, 34 ... link, 40 ... mounting frame, 4
DESCRIPTION OF SYMBOLS 1 ... Support bracket, 42 ... Linear bearing, 43 ...
Work machine, 44 ... advance / retreat cylinder, 45 ... motor, 46
48: Positioning arm.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-6-63730 (JP, A) JP-A-4-113153 (JP, U) JP-A-3-68965 (JP, U) (58) Investigation Field (Int.Cl. ⁶ , DB name) B22D 41/02 B22D 43/00 F27D 3/15

Claims (5)

(57) [Claims] 1. A positioning bracket attached to the bottom surface of a molten metal container and comprising two or more types of an upper positioning bracket having a V-shaped cut groove above and a lower positioning bracket having an inverted U-shaped cut groove below. A mounting frame having a positioning arm engaged with the positioning metal fitting, and a work machine having a locking mechanism provided on the positioning arm engaging the lower positioning metal fitting, and a mounting frame mounting the positioning arm with the positioning metal fitting And a mounting device for supporting the workpiece in a vertically movable manner. 2. The apparatus according to claim 1, wherein the mounting frame has a support bracket having an inverted V-shaped cut groove formed at a bottom portion, and the support bracket is cut by an engagement pin provided on a mounting device. A positioning / fixing device for a working machine with respect to a molten metal container, wherein the groove is engaged and supported. 3. The apparatus for operating a molten metal container according to claim 1, wherein the locking mechanism has a hook with a pin that is engaged with an inverted U-shaped cut groove of the lower positioning metal fitting. Machine positioning and fixing device. 4. The apparatus according to claim 3, wherein the hook with a pin is connected to the end of the lock cylinder rod so as to be tiltable in contact with the guide roller. apparatus. 5. The apparatus according to claim 1, wherein the mounting device comprises an upper stage and a lower stage connected by four links, and an elevating cylinder installed between the upper stage and the lower stage. Positioning and fixing device for working machine to molten metal container.