JPH0115350B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic hot water supply control device for selectively pouring hot water from a melting furnace into a plurality of casting machines.

In conventional casting operations, particularly casting operations using a gravity casting machine, a sand mold is first set in a mold of the gravity casting machine, and then the mold is tilted at an angle that makes it easiest to pour hot water into the sand mold. Here, the worker pours hot water supplied from the melting furnace into the mold using a ladle, then tilts the mold further, and when the hot water in the mold hardens, the worker tilts the mold. Return it and take out the product. After this, a new sand mold is set in the mold again and the process moves on to casting the next product.

As described above, in conventional casting work, workers supply hot water while going back and forth between the melting furnace and the casting machine, which not only poses risks, but also requires the use of almost one person per casting machine. There were shortcomings that the workers had to take care of.

Therefore, if there was a device that could automatically pour hot water from a melting furnace into multiple casting machines, the above drawbacks could be solved. Specifically, a conveyance path is provided between a melting furnace and a plurality of casting machines, a water heater is movably provided on this conveyance path, and the operation of this water heater is controlled by, for example, a relay sequence. Therefore, a method can be considered in which hot water from the melting furnace is sequentially poured into each casting machine.

However, this method of pouring hot water into multiple casting machines in a predetermined order poses a problem that cannot be applied, for example, when multiple casting machines are used to cast different products. Ru. This is because when different products are cast using multiple casting machines, the time from pouring the hot water until it hardens is different for each casting machine, so the order of pouring the hot water is not always uniform.

An object of the present invention is to provide an automatic hot water supply control device that can safely and efficiently pour hot water into a plurality of casting machines, and at the same time arbitrarily determine the order of pouring hot water according to the cycle of each casting machine. It's about doing.

Therefore, in the present invention, a conveyance path is provided between the melting furnace and the plurality of casting machines, and a hot water supply device that pours hot water supplied from the melting furnace to the plurality of casting machines is moved to this conveyance path. furthermore, a signal generating means for outputting a pouring command signal on the condition that pouring preparation is completed in each of the casting machines; and a signal generating means for sequentially storing the pouring command signals from each of the signal generating means; A control means for controlling the hot water supply device to sequentially pour hot water from the melting furnace into the specified casting machines according to the stored order,
This aims to achieve the above objectives.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the entire system of this embodiment. In this system, a base 3 is arranged in parallel between one electric melting furnace 1 and a plurality of gravity casting machines 2 ₁ to 2 _o . Each of the casting machines 2 ₁ to 2 _o is configured to have a sand mold set inside the mold, and is set at a predetermined inclination angle before and after pouring the metal. On the other hand, near each casting machine 2 ₁ to 2 _o ,
Molten pouring command buttons ₄₁ to _4o are respectively provided as signal generating means which are operated on condition that preparation for pouring has been completed, that is, the sand mold has been set in the mold. Then, these pouring command buttons 4 ₁ to 4 _o
When is pressed, a pouring command signal is output. Further, a water heater 6 is movably provided on the upper surface of the base 3 via a guide rail 5 as a conveyance path, and is located at a home position P ₀ facing the melting furnace 1. A home position detector 7 is provided to detect the arrival of the water heater 6. A home position signal from the home position detector 7 and a pouring command signal based on the operation of the pouring command buttons 4 ₁ to 4 _o are input to a controller 8 as a control means. The control means 8 sequentially stores the pouring command signals given by operating the pouring command buttons 4 ₁ to 4 _o , and sends them to the designated casting machines 2 ₁ to 2 _o according to the storage order. The operation of the hot water supply device 6 is controlled to sequentially pour the hot water supplied in the melting furnace 1.

FIG. 2 shows a specific structure of the water heater 6. As shown in FIG. In the water heater 6, carriers 11 are slidably mounted on guide rails 5 on both sides of the base 3. The carrier 11 has a rack 12 fixed to the guide rail 5 on one side at its lower part.
A pinion 13 that meshes with the pinion 13 and a travel motor 14 that moves the carrier 11 along the guide rail 5 by rotating the pinion 13 are provided, and the housing 16 is connected to the housing 16 via a support 15 on the upper part. is installed. The housing 16 rotatably supports a rotating shaft 18 rotated by a ladle tilting motor 17 at its upper portion, and a rotating shaft 20 rotated by a link actuating motor 19 at its middle portion. A link mechanism 21 is provided between the rotating shafts 18 and 20. The link mechanism 21 includes first and second arms 22, 2 each rotatably supported by the rotating shaft 18 at one end.
3, a third arm 24 having one end rotatably connected to the other end of the first arm 22, and a third arm 24 having one end rotatably connected to the other end of the second arm 23 and the other end. is rotatably connected to one end of the third arm 24, and one end is fixed to the rotating shaft 20 and the other end is rotatable to one end of the fourth arm 25. When the fifth arm 26 is swung by the drive of the link operating motor 19, the other end of the third arm 24 is rotated as shown by the chain line in the figure. It is designed to be displaced through a trajectory.
Further, the third arm 24 is provided with a hot water level detection sensor 27 having, for example, a pair of electrodes arranged in parallel on one side thereof, and the rotating shaft 18 on one end thereof.
A ladle 29 is attached via a support shaft 28 that is connected to the rotary shaft 28 via an interlocking mechanism (not shown) and rotates in synchronization with the rotation shaft 18 . Here, when the melt level of the melting furnace 1 is detected by the melt level detection sensor 27, the drive of the link operation motor 19 is stopped, and then the ladle tilting motor 17 is driven, and the ladle 29 is tilted. It is becoming more and more like this.

On the other hand, a rotary lever 30 is integrally fixed to the rotary shaft 18, and a water flow control device 31 is provided on the housing 16 to abut the rotary lever 30 and stop driving the ladle tilting motor 17. It is provided. The hot water flow control device 31 includes a switch 32 that stops the ladle tilting motor 17 when the rotary lever 30 comes into contact with the rotary lever 30, and a switch 32 that moves the switch 32 forward and backward relative to the rotary lever 30 to control the rotary lever 30. It is composed of a hot water amount control motor 33 that controls the rotation angle, that is, the inclination angle of the ladle 29. Here, when the ladle 29 is tilted at an angle set by the hot water amount control device 31, hot water is poured into the trouble 29 in an amount corresponding to the tilt angle. After this, Ladle 29
is raised above the melt level of the melting furnace 1 by the operation of the link mechanism 21 in that position, and then controlled to be in a horizontal position, and at the same time, the spindle 28 is moved at the position of each casting machine 2 ₁ to 2 _o . It is designed to be flipped 90 degrees upwards from the center.

FIG. 3 shows a specific circuit configuration of the controller 8. As shown in FIG. In the same figure, CPU (Central
The processing unit 41 is connected to I/O units 43 and 4 via an address bus and a data bus 42.
4. ROM (Read Only Memory) 45 and
A RAM (Random Access Memory) 46 is connected to each. The I/O unit 43 receives a pouring command signal based on the operation of the pouring command buttons 4 ₁ to 4 _o and a home position signal from the home position detector 7, and inputs a keyboard as well. 47 is connected. The amount of hot water required for each of the casting machines 2 ₁ to 2 _o is input from the keyboard 47 . The I/O unit 44 also includes the traveling motor 1.
4. In addition to the link actuation motor 19, the ladle tilting motor 17, and the hot water amount control motor 33, a display 48 is connected.

As shown in FIG. 4, the display device 48 includes, for example, priority order display sections 48A and 4 from 1st to 3rd place.
It is divided into 8B and 48C. Display section 4 for everyone
8A, 48B, and 48C include the casting machines 2 ₁ to 2 _o
Lamps (not shown) are provided corresponding to the machine numbers No. 1 to No. n, and the lamp corresponding to the machine number to be executed is lit in each person. For example, the first pouring command signal from casting machine ₂₁ is
The pouring command signal from the casting machine ₂₃ is outputted second, and the pouring command signal from the casting machine ₂₂ is outputted thirdly, and when they are stored in the RAM 46 in order, the first position on the display 48 is displayed. The display section 48A has a lamp corresponding to machine number No. 1, the second display section 48B has a lamp corresponding to machine number No. 3, and the third display section 48C has a lamp corresponding to the machine number.
The lamps corresponding to No. 2 are lit. Further, the ROM 45 stores in advance a sequence program for controlling the driving of the various motors based on input data such as the pouring command signal. Furthermore, the RAM 46 includes a first register 49 that encodes and sequentially stores the pouring command signals given based on the operations of the pouring command buttons 4 ₁ to 4 _o , and a molten metal quantity input from the keyboard 47 . A second register 50 and the like for storing data corresponding to each casting machine 2 ₁ to 2 _o is included.

Next, the operation of this embodiment will be explained.

First, input the amount of hot water data required for each casting machine 2 ₁ to 2 _o in order from the keyboard 47,
The hot water amount data for each casting machine 2 ₁ to 2 _o is stored in the RAM 46.
After storing the molten metal in the second register 50, pouring preparation work is performed in each of the casting machines ₂₁ to _2o . In this pouring preparation work, first, a sand mold is set in the mold, then the pouring command buttons ₄₁ to _4o are pressed, and then the mold is tilted to an angle that makes it most convenient for pouring hot water.

For example, if the pouring command button 4 ₁ is pressed first, the pouring command button 4 ₃ is pressed second, and the pouring command button 4 ₂ is pressed third, the CPU 41 controls the pouring command in the order in which they were pressed. Store command data in order in the first register 49 of the RAM 46, and store the command data in the first register 49 of the RAM 46
Display sections 48A, 4 corresponding to the rankings stored in 9
The casting machines 2 ₁ to 2 _o are displayed for each of 8B and 48C as shown in FIG. After this, CPU4
1 reads out the first pouring command data stored in the first register 49, and determines which casting machine 2
₁ to 2 Determine whether the data is pouring command data from _o ,
Based on the determination result, the traveling motor 14, the link actuating motor 19, the ladle tilting motor 17, and the flow rate controlling motor 33 are controlled in a predetermined order.

Here, the first pouring command data is the casting machine 2.
₁ , the CPU 41 first gives a drive command to the link actuating motor 19 while the water heater 6 is waiting at the home position _P0 , that is, the position facing the melting furnace 1, and the link mechanism 21, the ladle 29 is lowered toward the melting furnace 1, and after the hot water from the melting furnace 1 is supplied into the ladle 29, the ladle 29 is moved to the center position in FIG. 2, that is, to the position above the carrier 11. Bring it back. At this time, the ladle tilting motor 17 and the molten metal amount control motor 33 are controlled based on the molten metal amount data of the casting machine 2 ₁ stored in the second register 50, and the amount of molten metal required for the casting machine 2 ₁ is adjusted to the ladle. Hot water will be supplied on 29th. Subsequently, a drive command is given to the traveling motor 14 to move the carrier 11 from the home position P 0 in FIG. 1 to the position P ₁ of the casting machine 2 ₁ and stop it _. Furthermore, with the carrier 11 stopped at the P ₁ position, the link actuation motor 1
A drive signal is applied to 9 to advance the ladle 29 toward the casting machine 2 ₁ through the operation of the link mechanism 21 .
Then, when the ladle 29 reaches the casting machine ₂₁ ,
After giving a drive command to the ladle tilting motor 17, inverting the ladle 29 by 90 degrees counterclockwise in FIG. 2, and pouring the hot water in the ladle 29 into the casting machine ₂₁ ,
Return the ladle 29 to the horizontal state. After that, after returning the ladle 29 to the position above the carrier 11, a drive command is given to the travel motor 14, and the carrier 11 is returned to the home position _P0 to complete pouring into the casting machine ₂₁ . .

Next, when the carrier 11 returns to the home position P ₀ and the home position detector 7 receives the home position signal to the CPU 41, the CPU 4
1 shifts the data in the first register 49 in order, reads out the first data, that is, the second input data, and determines which casting machine 2 ₁ to 2 _o the pouring command data is from. Determine. In this case, since the data is from casting machine 2 ₃ ,
The CPU 41 controls the traveling motor 14, the link actuating motor 19, the ladle tilting motor 17, and the hot water amount control motor 23, and causes hot water from the melting furnace 1 to be poured into the casting machine ₂₃ . In this way, the first
Molten metal is selectively poured into each of the casting machines 2 ₁ to 2 _o according to the data stored in the register 49 .

On the other hand, in each of the casting machines ₂₁ to _2o , when the poured molten metal hardens and the product is completed, the worker takes out the product, sets a new sand mold in the mold again, and then pours the molten metal. Press command button 4 ₁ to 4 _o . Then, the data corresponding to the pressed pouring command buttons 4 ₁ to 4 _o will be displayed.
The data is sequentially stored in the first register 49 of the RAM 46, and according to the order of the data stored in the first register 49, metal is selectively poured into each of the casting machines ₂₁ to _2o .

Therefore, in this embodiment, each of the casting machines 2 ₁ to 2 _o pours molten metal in order from the one that is ready for pouring, so that, for example, each of the casting machines 2 ₁ to 2 _o casts a different product. Even in such a case, it is possible to efficiently pour molten metal and to pour the necessary amount of molten metal into each of the casting machines 2 ₁ to 2 _o . In addition, in this embodiment, each casting machine 2 ₁ from the melting furnace 1
Since the hot water supply device 6 automatically performs the work of pouring hot water into ~2 _o , work safety can be ensured, and labor savings can be expected.

In addition, in the above embodiment, a plurality of casting machines 2 ₁ to
2 _o , but the present invention is directed to at least two or more casting machines. In addition to the pouring command buttons ₄₁ to _4o described in the above embodiments, signal generating means may be used, for example, to automatically detect when a sand mold is set in each casting machine and generate a pouring command signal. It may be something that is output. Furthermore, the control means is not limited to the circuit described in the above embodiment.

As described above, according to the present invention, it is possible to safely and efficiently pour hot water into multiple casting machines, thereby saving labor, and at the same time, the order of pouring hot water can be determined according to the cycle of each casting machine. Therefore, the present invention can be applied even when each casting machine casts a different product, for example.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, and Fig. 1 is an explanatory diagram showing the entire system, Fig. 2 is a side view showing the water heater, Fig. 3 is a block diagram showing the controller, and Fig. 4 is an explanatory diagram showing the entire system. It is a front view showing a display. 1... Melting furnace, 2 ₁ ~ 2 _o ... Casting machine, 4 ₁ ~ 4 _o
...Pouring command button as a signal generating means, 5...Guide rail as a conveyance path, 6...Water heating device, 8...
...controller as a means of control.

Claims (1)

[Claims] 1. A melting furnace, a plurality of casting machines, a conveyance path provided between these plurality of casting machines and the melting furnace, and a conveyor path provided movably along the conveyance path to supply hot water from the melting furnace. a hot water supply device for pouring hot water into the plurality of casting machines; a signal generating means for outputting a pouring command signal on condition that preparation for pouring is completed in each of the casting machines; control means for sequentially storing the melt pouring command signals and controlling the hot water supply device to sequentially pour hot water from the melting furnace to the casting machine specified according to the stored order. Features an automatic hot water supply control device.