JPH0478395B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates generally to continuous casting systems, and more particularly to continuous casting systems for continuously casting materials such as, for example, cast iron, cast steel, aluminum, and the like.

Conventional techniques and their problems Conventionally, in continuous casting systems for continuously casting cast iron, cast steel, aluminum, etc.,
For example, a mold with an upper mold and a lower mold stacked on top of each other was made continuously on a molding line, and then sent to a mold conveying device such as a tact drive type continuous mold conveyor line to sequentially pour the mold. However, since the above-mentioned tact drive type mold conveyance device cannot improve the productivity of the molding line, in recent years, continuous feed type mold conveyance devices have been adopted in place of the tact drive type. It's here. However, in this type of continuous casting system, pouring into the mold has traditionally been carried out by an operator manually operating an operating section to tilt a pouring device such as a pouring ladle. Therefore, when a continuous feed type mold conveyance device as described above is adopted, the worker must perform the above-mentioned pouring work while walking in accordance with the moving speed of the mold conveyance device. As a result, workers are forced to perform even harsher work in a poor working environment. Moreover, even if the operator is skilled in pouring the metal as described above, as the conveyance speed of the mold in the mold conveyance device increases, it becomes difficult to uniformly supply the pouring metal to each mold. Therefore, the problem arises that the quality becomes unstable and the defective rate, which indicates the percentage of defective products included in the finished product, increases.

Purpose The present invention was devised in order to improve the various problems faced by the conventional continuous casting system as described above. By automating the pouring work, it is possible to control the supply of molten metal to each mold at a nearly constant level, thereby stabilizing the quality of the product. The objective is to provide a continuous casting system that enables continuous casting.

Means for Solving the Problems The above objects are achieved by a continuous casting system according to the present invention. To summarize, the present invention provides a mold transport device capable of carrying and transporting a plurality of molds, a mold transport device driving means for driving the mold transport device based on a given command signal, and the mold transport device. and a rail portion disposed close to the mold, and is movably supported by the rail portion and capable of taking a receiving position for receiving molten metal supplied from the outside and a pouring position for pouring the molten metal into the mold. a pouring device, which drives the pouring device along the rail portion based on a given command signal; a pouring device driving means for driving the pouring device between the pouring device and the mold to start moving the pouring device when the mold to be poured reaches a preset position, and when the pouring device and the mold are synchronized; The continuous casting system is characterized by comprising a control means for controlling each of the two pouring device driving means so as to start pouring.

Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an overview of a continuous casting system according to an embodiment of the present invention. As is clear from FIG. 1, the outline of the continuous casting system according to an embodiment of the present invention includes a mold conveying device 1 capable of continuously conveying molds sent from a molding line (not shown). , consisting of a rail portion 3 disposed close to the mold conveying device 1, and a pouring device 5 movably provided on the rail portion 3.

The mold conveyance device 1 described above includes various conveyors (which are driven by a mold conveyance device driving means such as an electric motor (not shown) and which can continuously convey a plurality of molds 7, which is called a so-called continuous mold line). (not shown). The conveyance speed of the conveyor (not shown) of the mold conveyance device 1 is set to approximately 50 to 100 mm/sec,
In one embodiment according to the present invention, it is adapted to move in the direction of the arrow in FIG. In one embodiment according to the present invention, the rail portion 3 is provided on one side of the mold conveying device 1 in the conveying direction, in a direction substantially perpendicular to the mold conveying device 1, as is clear with reference to FIGS. 1 and 2, respectively. a first rail laid along the mold conveying device 1 on the side where the hot metal discharge rail 9 is laid, and a first rail laid along the mold conveying device 1, and the rail 11. A second rail 1 disposed along the mold conveying device 1 on a pedestal 17 that is movable thereon.
It consists of 3. The aforementioned rail 9 for discharging metal is used to drain the molten metal accumulated in the pouring device 5 mounted on the rail 13, and the mold conveying device 1 is installed therein. It is laid in a deep groove (pit) 21 formed on the floor in a direction substantially perpendicular to the mold conveying device 1. On the rail 9 for discharging hot water,
A frame 15 having wheels 15a as shown in FIG. 2 is fixed at a position closest to the mold conveying device 1 so as not to move on the rail 9 except during the above-mentioned draining. is listed,
A rail 111, which is a part of the rail 11 described later, is arranged on the pedestal 15 along the mold conveying device 1. The rail 11 includes a rail 110 laid in a groove 23 shallower than the groove 21 formed along the mold conveying device 1 on the installation surface of the mold conveying device 1, and a rail 110 disposed on the pedestal 15. It is formed by a rail 111 (shown in FIG. 2). In one embodiment according to the present invention, the rail 13 is provided with some kind of protective measures such as a protective cover over its entire length to prevent the rail surface from being contaminated by dust, hot water beads, etc. Highly accurate rails and bearings are used to maintain the accuracy of measuring molten metal during pouring. The aforementioned rail 13 is mounted on a pedestal 17 having wheels 17a as shown in FIG. It is arranged with a The pedestal 15 mounted on the above-mentioned hot water discharge rail 9 is moved by some driving means such as an electric motor (not shown), and also on the rail 110 and the rail 111 disposed on the pedestal 15. The pedestals 17 mounted on the mounts 17 are configured to be movable on respective rails by a drive device 25 such as an electric motor. Along with this, the pedestal 17
is equipped with a pouring device driving means, ie, a driving device 37 such as an electric motor, for moving the pedestal 19 placed on the rail 13, and a pinion 37b driven by the driving device 37. The driving device 37 is capable of accelerating and decelerating approximately linearly when moving the pedestal 19 in accordance with command signals from a control means to be described later. The configuration of the pouring device may already be well known to those skilled in the art, but the pouring device used in the continuous casting system according to one embodiment of the present invention is disclosed in Japanese Patent Publication No. 52-9580 and Japanese Patent Publication No. 55-1989. The pouring method and pouring ladle disclosed in No. 46272 are preferably used, and the outline thereof will be described as follows. pot 2
7 and a pedestal 19 on which the holder 7 is rotatably supported. The fan-shaped pouring ladle 27 described above is
A tap hole 29 is provided near the end of the front wall in the rotation direction, and a sector gear 31 necessary for rotating the pouring ladle 27 is provided on the rear wall side in the rotation direction. The pedestal 19 that rotatably supports the pouring ladle 27 includes a gear 33 meshing with the sector gear 31 and a pouring device drive means for applying driving force to the gear 33. That is, a drive device 35 such as an electric motor and a pinion 37b on the side of the pedestal 17
A rack 37a is provided in mesh with the rack 37a. A mold 7 having a shape including a sprue 41 as shown in FIG. There is. The aforementioned rail section 3
A molten metal conveyance line 43 is laid in a loop shape on the side opposite to the mold conveyance device 1, and a holding furnace disposed close to the molten metal conveyance line 43 is disposed on the molten metal conveyance line 43. A movable molten metal transfer machine 47 is provided which receives the molten metal supplied from the molten metal 45 and supplies it to the pouring ladle 27. The driving of the driving devices 25, 37 and the mold conveying device 1 is as follows:
This is carried out under the control of control means contained in a control box (not shown) provided in the continuous casting system according to the invention. As this type of control means, any control means that can establish an interlock between the mold conveying device 1 driving means and the driving devices 25, 35, and 37 is sufficient, so for example, an electronic circuit such as a microprocessor is sufficient. Control equipment may be used, or a sequence relay circuit that operates for a limited time may be used. In the continuous casting system according to the present invention, the control means described above controls when the sprue 41 of the mold 7 to which the molten metal continuously transported by the mold transport device 1 is to be supplied has reached a preset position. When the information indicating the mount is given via some means (for example, an output signal from a position detection sensor), a drive command signal is output to the drive device 37 to start the movement of the pedestal 19. When a predetermined period of time has elapsed since the start, a drive command signal is output to the drive device 35 to tilt the pouring ladle 27, so that the moving speed of the pedestal 19 and the moving speed of the mold conveying device 1 are approximately equal to each other. When the pouring ladle 27 matches the pouring ladle 27 and the sprue 41 of the mold 7 is synchronized, the pouring ladle A command signal is output to the drive device 35 to cause the pot 27 to assume a pouring attitude. In this embodiment, the pouring operation of the ladle can be done arbitrarily, but as mentioned above,
Preferably, it is carried out according to No. In other words, the aforementioned pouring ladle 27 is rotated and tilted at a speed of Vθ1 before pouring, rotated and tilted at a speed of Vθ2 (Vθ2<Vθ1) during pouring, and reversely tilted at a certain speed when pouring is completed.
The position of the molten metal falling start point and the sprue 41 of the mold 7 is kept constant and the molten metal is poured without changing the flow line of the molten metal between the pouring ladle 27 and the sprue 41 of the mold 7. It is desirable to control the movement of ladle 27.

The actual pouring operation in the continuous casting system configured as described above is performed by the process described below. When recognizing by known technical means that the mold 7 on the mold conveying device 1 to which molten metal is to be supplied has reached the position shown in FIG. 3A by driving the mold conveying device 1, the control means: The drive device 3
A drive command signal is output to 7 to start the movement of the standby stand 19 at the position shown in FIG. 3B. here,
Now, suppose that the moving speed of mold conveyor 1 is set to 100mm/
sec is constant, and the above-mentioned points A and B, the moving speed of the mold conveying device 1, and the moving speed of the pedestal 19 match, so that the sprue 41 of the mold 7 and the pouring ladle on the pedestal 19 match. The distance from point A to point C is the positional relationship with point C where the outlet 29 of 27 is synchronized.
300mm, and the distances from point A to point B and from point B to point C are each set to 150mm, then the mold 7 is
If the pedestal 19, which is waiting at point B, is moved at a constant acceleration of 33.3 mm/sec ² after recognizing that the point has been reached, the mold 7 and the pedestal are moved at a lapse of 3 seconds from the start of movement. 19 will reach point C together. In this case, in order to shorten the pouring time, the pouring device 5 will start tilting at the same time as it starts moving from point B by the time it reaches point C, and will start dispensing just as it reaches point C. do. Figure 3C
At the position of the point, the mold 7 to which the molten metal is to be supplied is shown.
Since the sprue 41 is located almost directly below the tap 29 of the pouring ladle 27, it is located at the third point from the point C.
If the driving device 35 is controlled so that the pouring ladle 27 starts pouring in the section on the right side of the figure, pouring can be performed while the movement of the mold 7 and the pouring ladle 27 are synchronized. can. Here, if the time required for pouring is set to 10 seconds, the pouring ladle 27
The mold 7 and the pedestal 19 are both 100mm/sec×
10=1000mm, that is, 3rd point from the above point C by 1m
This means that it has moved to the right side of the figure. Upon completion of the pouring operation, the aforementioned pouring ladle 27 drains the hot water and decelerates to a stop, and at the same time the pedestal 19 decelerates to a stop (this requires 3 seconds) and moves back to the next pouring standby position. becomes. By the way, if the continuous casting system according to the present invention has no restrictions on the section (hereinafter referred to as the "pouring zone") in which the above-mentioned pouring operation can be performed, and the pouring zone can be set to be sufficiently long, By simply leaving the stand 19 on standby at the position where the pouring ladle 27 has completed the pouring operation, it is possible to repeat the same pouring operation as described above for the mold 7 that needs to be supplied with molten metal next. In this case, there would be no problem if the rail 13 on which the pedestal 19 is mounted could be laid over the entire section of the above-mentioned pouring zone in this embodiment, but it is not realistic.
Furthermore, even if the above configuration is possible, in order to maintain measurement accuracy during pouring so that the amount of molten metal supplied to each mold 7 is approximately constant, it is necessary to simply extend the rail 13 to the entire length of the pouring zone. It is not enough to simply lay the ground. That is, inside a foundry that has this type of continuous casting system, there is a lot of dust and molten metal, etc. If the rail is contaminated by these dust and molten metal, the surface of the rail becomes uneven due to the contamination, so the mount 19 If it moves on the rail, it will be subject to vibration and the accuracy of measuring the molten metal during pouring will no longer be expected. Therefore, in order to protect the rail from dust and hot water, it may be possible to install a protective cover over the entire length of the rail on which the pedestal 19 can move, but this is also not realistic. Therefore, as described above, the present inventors installed a rail 11 on the installation surface of the mold conveying device 1 along the mold conveying device 1, including the groove portion 23, and having a length corresponding to the length of the pouring zone. The frame 1 can be laid and moved freely on the rail 11.
A rail 13 having a length corresponding to the stroke required for pouring into at least one mold 7 is disposed on a frame 17 which is movable on the rail 11. A frame 19 is configured to be movable on the rail 13. Furthermore, the rails 13 are equipped with highly accurate rails and bearings, and a protective cover or the like is installed on the rails 13 to ensure accurate movement of the pedestal 19 and measurement of poured molten metal. Since the rails to be laid along the mold conveying device 1 are constructed in two stages, the rails 11 are laid during the pouring operation.
The upper frame 17 can be kept stationary so as not to move on the rail 11. As mentioned above, if the length of the rail 13 is set to a length corresponding to the stroke required when pouring metal into one mold, each time the pouring into one mold 7 is completed, It is necessary to return the pedestal 19 to the standby position (for example, the position of point B shown in FIG. 3) prior to the start of pouring, but during this time the mold conveying device 1
Since the conveyor is continuously moving downstream in the conveying direction, depending on the conveying speed of the mold conveying device 1, it may be necessary to pour the metal simply by returning the pedestal 19 to the above-mentioned standby position. sprue 41 of mold 7
It is conceivable that the molten metal is passing downstream of the outlet 29 of the pouring ladle 27. Therefore, in order to prevent such a problem from occurring, it is necessary to move the pedestal 17 to the downstream side in the mold transport direction.

To explain the above-mentioned contents in more detail using a specific example, a pouring stop command is issued to one mold 7, the pouring ladle 27 is tilted backward to the pouring standby position, and pouring is completed. It usually takes 2 seconds to
Meanwhile, the mold 7 on the mold conveying device 1 that requires pouring is moving downstream by 100 mm/sec x 2 = 200 mm. Here, one pitch of the sprue 41 of each mold 7 is
Frame 1 with a diameter of 1500 mm and a pouring ladle 27 placed on it
9, the return speed in the transport direction (left direction in Figure 3).
Assume that it is set to 500mm/sec. Also for pouring work
If it takes 10 seconds, the mold 7 that has reached point A in Figure 3 is poured at point C in Figure 3 until the pouring is completed. 100mm/sec×10+150mm+150 including
Since mm = 1300mm, it has moved 1300mm, so the time required to return to the original position is 1300mm ÷ 500.
= 2.6sec. On the other hand, pouring ladle 27
Mold conveying device 1 is 100mm x 10 + 100mm x 3 x 2 by the time it completes pouring and returns to the pouring standby position.
+100mm x 2 = 1800mm movement,
Furthermore, during the return movement of the mount 19, 100 mm x 2.6 =
Adding the 260mm movement, 1800mm + 260
mm = 2060 mm, and since one pitch of the sprue 41 of the mold 7 is 1500 mm, 2060 mm - 1500 mm = 560
mm, and the sprue 41 of the mold 7 has moved 560 mm downstream in the conveyance direction. Therefore, the above-mentioned control means controls the pedestal 19.
560mm in 2.6 seconds (i.e. 560mm÷2.6=215
Since a command is output to the drive device 37 to move the pouring ladle 27 downstream (at a speed of 500 mm/sec), the pedestal 19 on which the pouring ladle 27 is placed has a speed of -215=285mm/sec, so 285mm×2.6=741
This means that it has returned by mm to the upstream side in the conveyance direction from the point where the pouring was completed. As is clear from the above, since the rails to be laid along the mold conveying device 1 have a two-stage configuration, the pouring zone can be shortened and the cycle time required for pouring work can be saved. It is particularly suitable for foundries, etc., where the length of the pouring zone cannot be set too long due to the heat.

FIG. 4 shows an overview of a continuous casting system according to another embodiment of the present invention. An overview of a continuous casting system according to another embodiment of the present invention is provided in the fourth section.
As is clear from the figure, one more pouring device 5 having the same configuration as that shown in FIGS. A rail 9 for hot water and a rail 9 for discharging the hot water
A pedestal 15 placed on top and forming a part of the rail 11 is provided corresponding to the pouring device 5, so that when one pouring device 5 is in the pouring state, the other pouring device 5 is in the pouring state. The control means controls the drive devices 35 and 37 for driving each of the pouring devices 5 so that the pouring devices 5 are in the hot water receiving state.

The reason why two pouring devices 5 are provided as described above is as follows. In the embodiment according to the present invention as illustrated in FIGS. 1 and 2, only one pouring device 5 is driven, so that the pouring ladle 27 is It may stop,
Continuous pouring work within the pouring zone is practically impossible. Therefore, only one pouring device 5 cannot support the continuous feeding type mold conveying device 1.
Therefore, continuous pouring work is made possible by additionally providing the pouring device 5 which is driven in the same manner under the control of the control means as described above. To explain the operation of the above-mentioned configuration in more detail, when the pouring device 5 on the upstream side in the conveyance direction pours metal into a predetermined number of molds 7, the pouring device 5 on the downstream side in the conveyance direction pours metal into the molds 7. The molten metal pouring device 5 pours molten metal into the mold 7 that has been transported next to the mold 7 into which the molten metal has been poured. While the pouring device 5 on the downstream side in the conveying direction is pouring metal into the mold 7, the pouring device 5 on the upstream side in the conveying direction is a molten metal conveying machine that has moved on the molten metal conveying line 43. 47
The molten metal is received by the molten metal molds 7, and the molten metal waits at the pouring start point shown in FIG. The pouring operation starts from the next mold 7. On the other hand, the pouring device 5 on the downstream side in the conveyance direction also has the mold 7 in the pouring device 5 on the upstream side in the conveyance direction.
While pouring the molten metal into the molten metal, the molten metal is received by the molten metal conveying machine 47 at the point shown in FIG. 4, and remains on standby at that point. As described above, by alternately using the two pouring devices 5 for pouring work, it is possible to fully cope with the continuous feed type mold conveying device 1, and the rails along the mold conveying device 1 can be By doubling the molten metal, the pouring zone can be made smaller, and by making the pouring zone smaller, the moving distance of the pouring equipment can be shortened.
It is now possible to perform the process within a time that maintains the quality of the molten metal as one pouring cycle.
Although FIG. 2 shows a fan-shaped pouring ladle as an example, it goes without saying that not only a fan-shaped pouring ladle but also a cylindrical or circular pouring ladle may be used.
In addition, the pouring device 5 is designed to be more suitable for continuous pouring work.
When adding , the number of additional units is not limited to one, but may be two or more.

In both of the above-mentioned two embodiments, the moving speed of the pouring device was variably controlled.
In some cases, the speed of the movement of the conveyor of the mold transport device may be variably controlled.

Effects of the Invention As explained above, according to the present invention, the movement of the pouring device is started when the mold to be poured reaches a preset position, and the time point when the pouring device and the mold are synchronized. Since we decided to control the mold conveyance device driving means and both pouring device driving means respectively so as to start pouring at To provide a continuous casting system that can control the supply of molten metal to each mold at a substantially constant level by automating pouring work, thereby stabilizing the quality of products. be able to.

[Brief explanation of the drawing]

FIG. 1 is a partial plan view showing an outline of a continuous casting system according to an embodiment of the present invention. FIG. 2 is a longitudinal sectional view taken from the - line direction of FIG. 1. FIG. 3 is an explanatory diagram of the operation of the configuration shown in FIG. 1. FIG. 4 is a partial plan view schematically showing a continuous casting system according to another embodiment of the present invention. 1: Mold conveyance device, 3: Rail section, 5: Pouring device, 7: Mold, 25: Drive device, 35: Drive device, 37: Drive device.

Claims (1)

[Scope of Claims] 1. A mold conveying device capable of carrying and transporting a plurality of molds; a mold conveying device driving means for continuously driving the mold conveying device based on a given command signal; a first rail laid along the mold conveying device; a pedestal movable on the first rail; a second rail laid on the pedestal along the mold conveying device; A metal receiving position that is movably supported on the second rail so as to be able to move on the second rail by a stroke necessary to pour the metal into at least one mold, and that receives molten metal supplied from the outside. and a pouring device having a pouring ladle configured to take a pouring position for pouring molten metal into the mold; a pouring device driving means that drives along the first and second rails;
A pouring ladle driving means for driving the pouring ladle between a receiving position and a pouring position; and a pouring ladle driving means for driving the pouring ladle between a metal receiving position and a pouring position, and a movement of the pouring device when a mold to be poured reaches a preset position. A continuous method characterized by comprising control means for respectively controlling the pouring device driving means and the pouring ladle driving means so as to start pouring when the starting pouring device and the mold are synchronized. casting system. 2. The control means starts moving the pouring device when the sprue of the mold on the mold conveying device reaches a preset position, and causes the sprue of the mold and the pouring device to synchronize. The moving speed of the pouring device is accelerated or decelerated approximately linearly so that the pouring device can be moved, and the pouring device is tilted at a position slightly before synchronization between the pouring device and the sprue of the mold. Claim 1, characterized in that the pouring device driving means and the pouring ladle driving means are controlled so that the pouring device assumes a pouring posture when the sprue of the mold is synchronized with the sprue of the mold. Continuous casting system as described in section. 3. At least two sets of the gantry and pouring device are provided, at least two sets of pouring device driving means are provided for moving the pouring device along the second rail in correspondence with each of the pouring devices, and one set of pouring devices is provided. The control means controls each of the pouring device driving means and the pouring ladle driving means so that when the pouring device is in the pouring state, another pouring device is in the receiving state. Claim 1 or 2 characterized by
Continuous casting system as described in section.