JPH029533B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an automatic hot water supply device for a casting machine.

In an automatic water supply device that automatically pours molten metal such as aluminum supplied in a melting furnace into a casting machine, for example, the ladle is immersed in the molten metal in the melting furnace for a predetermined period of time, and then the ladle is raised a predetermined distance above the surface of the molten metal. There, the hot water is drained for a predetermined period of time, and then the ladle is advanced toward the casting machine at the forward standby position, and on condition that a pouring command is output within a predetermined time, it is moved forward again to the pouring position, and at that pouring position, the ladle is moved forward to the pouring position. The molten metal inside is poured into the casting machine, the ladle is returned to its position after a predetermined time has elapsed after the pouring, and an injection command is output to the casting machine after a predetermined time has elapsed from the completion of pouring, and then the ladle is transferred to the melting furnace. This operation is performed as one cycle.

However, with conventional automatic water heaters that operate in this way, the amount of time the ladle is immersed in the molten metal (furnace), the distance it is raised above the surface of the hot water to drain it, and the amount of time it takes to drain the hot water after pouring the hot water are limited. Draining time, allowable advance standby time for waiting for a pouring command in the ladle forward standby position (after a certain period of time, the temperature of the hot water in the ladle will drop, so the action is taken to return it to the furnace), the posture of the ladle after pouring. Since the time required to drain the hot water after pouring until it returns to normal and the time required to output the injection command after pouring are controlled by timers, the ladle size may change,
Another disadvantage is that adjustments must be made each time the amount of hot water in the ladle, the temperature of the hot water, the running speed of the water heater, etc. change.

Here, an object of the present invention is to obtain at least the above-mentioned operation control time etc. from the hot water supply amount data and control the operation based on this, thereby stabilizing the state of the molten metal during injection and reducing the setup time. Our objective is to provide automatic water heating equipment for casting machines.

Therefore, in the present invention, in order to perform a hot water supply operation in which the molten metal from the melting furnace is poured into the casting machine in a predetermined order, a ladle for drawing up the molten metal and a ladle between the melting furnace and the casting machine are provided. A ladle travel motor that reciprocates, a position detector that detects the position of the ladle that is reciprocated by the ladle travel motor, a ladle posture control motor that tilts the ladle during hot water supply and pouring, and this ladle. An angle detector for detecting the angle of the ladle tilted by the attitude control motor, and a controller for controlling the operations of the ladle traveling motor and the ladle attitude control motor are provided. This controller then controls the molten metal immersion time during which the ladle is in the molten metal in the melting furnace, the distance the ladle is raised above the molten metal surface for draining, the time required for draining the hot water after supplying the hot water, and the ladle advance standby position. Among the allowable waiting time for waiting for the pouring command from the casting machine, the draining time after pouring until the ladle returns to its position after pouring, and the time until outputting the injection command after pouring,
The above object is achieved by calculating at least one set of setting data based on data on the amount of molten metal fed into the ladle and controlling each of the motors based on the obtained setting data. be.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows the overall mechanism of this embodiment.
In the figure, between the casting machine 1 and the melting furnace 2,
A hot water supply mechanism 3 of an automatic hot water supply device 32 is provided for pouring molten metal such as aluminum fed in the melting furnace 2 into the casting machine 1. The hot water supply mechanism 3 includes a base 11 provided between the casting machine 1 and the melting furnace 2, and a housing 16 is attached to the upper part of the base 11 via a support 15. The housing 16 rotatably supports a rotating shaft 18 rotated by a ladle attitude control motor 17 at its upper portion, and a rotating shaft 20 rotated by a ladle travel motor 19 at its middle portion. A link mechanism 21 is provided between both rotating shafts 18 and 20.

The link mechanism 21 includes first and second arms 22 and 23, each of which has one end rotatably supported by the rotating shaft 18, and one end of which is rotatably supported by the first arm 22.
a third arm 24 rotatably connected to the other end;
and a fourth arm 2 whose one end is rotatably connected to the other end of the second arm 23 and whose other end is rotatably connected to one end of the third arm 24.
5, and a fifth arm 26 whose one end is fixed to the rotating shaft 20 and whose other end is rotatably connected to one end of the fourth arm 25. When the fifth arm 26 swings due to driving, the other end of the third arm 24 is displaced along a trajectory shown by a chain line in the figure. Further, the third arm 24 includes:
A hot water level detection sensor 27 having, for example, a pair of electrodes arranged in parallel is provided on one side thereof, and is connected to the rotating shaft 18 at one end via an interlocking mechanism (not shown) and rotates in synchronization with the rotating shaft 18. A ladle 29 is attached via a support shaft 28.

FIG. 2 shows the circuit configuration of the automatic hot water supply device 32. As shown in FIG. In the same figure, the hot water supply controller 33 that controls the hot water supply mechanism 3 of the automatic hot water supply device 32 includes:
It includes a CPU 41, an interface 42 connected to the CPU 41 via a bidirectional bus, a ROM 43 that stores predetermined programs, and a RAM 44 that stores various variable data. The interface 42 is connected to the ladle attitude control motor 1 via a motor drive circuit 34.
The ladle traveling motor 19 is connected to the ladle traveling motor 19 via the ladle posture control motor 17 and the ladle posture control motor 17, and serves as an angle detector for detecting the inclination angle of the ladle 29 whose posture is controlled by the ladle posture control motor 17. Data θ from the encoder 36, data X from the encoder 37 as a position detector that detects the position of the ladle 29 driven by the ladle travel motor 19, a thermocouple that detects the temperature of the molten metal in the melting furnace 2, etc. data H ₁ from the temperature sensor 38 that detects the ambient temperature, data H ₂ from the temperature sensor 39 that detects the ambient temperature, hot water supply amount increase/decrease command value Q from the hot water supply amount increase/decrease command section 40, and the setting section 4.
Data N, K ₁ to _{K 15} from 5 and advance command FC and pouring command PC from casting machine controller 51
etc. are entered respectively. On the other hand, from the interface 42, the injection command IC output from the CPU 41 is given to the casting machine controller 51. Here, information from a melting furnace controller 52 that controls the melting furnace 2 is input to the casting machine controller 51 .

The RAM 44 also stores data θ, θ, and θ from the encoders 36 and 37, as shown in FIG.
Registers 61 and 62 for storing X, registers 63 and 64 for storing data H ₁ and H ₂ from the temperature sensors 38 and 39, and storing ladle size data N and constant data K ₁ to K ₁₅ from the setting section 45. In addition to the registers 65 and 66, six counters 67 to 72 are provided to control the hot water supply operation.

Further, when the hot water supply amount increase/decrease command value Q is inputted from the hot water supply amount increase/decrease command unit 40, the CPU 41
After driving the ladle posture control motor 17 and tilting the ladle 29 according to the hot water supply amount increase/decrease command value Q, the ladle posture control motor 17 is driven according to the hot water supply amount increase/decrease command value Q, and then the ladle 29 is tilted based on the data stored in the registers 61 to 66 according to a preset procedure. , the setting data of the molten metal immersion time when the ladle is in the molten metal (furnace), the distance it is raised above the hot water level to drain the hot water, the time required to drain the hot water after hot water is supplied, and the ladle advance standby position. Advance standby allowable time to wait for hot water command (after a certain period of time, the temperature of the hot water in the ladle will drop, so the hot water is returned to the furnace), draining after pouring until the ladle returns to its position after pouring hot water The time required to output the injection command after pouring the molten metal is calculated.

Now, let the ladle size data and the ladle inclination angle data be N and θ, the hot water temperature data of the melting furnace be _H1 , and the amount of hot water obtained from the ladle size data N and the ladle inclination angle data θ be W. The molten metal immersion time during which is in the molten metal (furnace)
T ₁ can be determined by T ₁ =K ₁ W+K ₂ H ₁ +K ₃ . However, K ₁ , K ₂ , K ₃
is a constant.

The distance L to be raised above the hot water level for draining the hot water can be determined by L=K ₄ N+K ₅ since it is enough for the ladle to be away from the hot water surface. However, K ₄ and K ₅ are constants.

Time required to drain hot water after hot water supply
Since T ₃ is proportional to the hot water surface area in the ladle = the amount of hot water supplied, it can be determined as T ₃ = K ₆ W + K ₇ . However, K ₆ and K ₇ are constants.

Allowable advance standby time to wait for a pouring command at the ladle forward standby position (After a certain period of time, the temperature of the hot water in the ladle will drop, so the operation is performed to return it to the furnace.) _T4 is based only on the hot water temperature in the ladle. Therefore, T ₄ = K ₈ W + K ₉ H ₁ + K ₁₀ can be obtained. However, K ₈ , K ₉ , K ₁₀
is a constant.

The time T ₅ for draining hot water after pouring until the ladle is returned after pouring is related to the settling of the hot water in the sleeve and the temperature of the hot water, so it can be calculated as T ₅ = K ₁₁ W + K ₁₂ H ₁ + K ₁₃ . However, K ₁₁ , K ₁₂ ,
K ₁₃ is a constant.

Time until outputting injection command after pouring molten metal T ₆
is determined by the ladle size, so it can be found as T ₆ = K ₁₄ W + K ₁₅ . However, K ₁₄ and K ₁₅ are constants.

In this way, the obtained data T ₁ to T ₆ ,
L is set in the counters 67 to 72, and the operation of the hot water supply mechanism 3 is controlled according to the set data _T1 to _T6 and L.

That is, as shown in FIG.
When the ladle 29 reaches the position _P1 where the melt level of the melting furnace 2 is detected by
7, the ladle 29 is tilted at a predetermined angle, and a predetermined amount of molten metal corresponding to the tilt angle is supplied into the ladle 29. Here, after time T ₁ elapses,
By the operation of the link mechanism 21, the ladle 29 is raised from the melting surface of the melting furnace 2 by a distance L while maintaining its position, and after draining the hot water for a certain period of time _T3 at that position _P2 , the position is controlled to a horizontal state. and move it forward to the standby position _P3 . At this standby position P ₃ , the ladle 29 is advanced again to the pouring position P ₄ on the condition that the advance command signal FC is issued from the casting machine controller 51 within the range of time T ₄ , and here the casting machine controller 51 On condition that a pouring command signal PC is issued from the controller, the ladle 29 is turned upward by 90 degrees about the support shaft 28, and the molten metal in the ladle 29 is poured into the casting machine 1. After pouring, for a specified period of time
While returning the ladle 29 to the horizontal state after T ₅ ,
After the elapse of time _T6 , the injection command signal IC is output to the casting machine controller 51, and then the casting machine controller 51 is returned to the position _P1 where the melt level of the melting furnace 2 is detected by the melt level detection sensor 27 by a backward operation. This operation is defined as one cycle.

Therefore, according to this embodiment, the hot water supply controller 33 determines whether the ladle is in the molten metal (in the furnace) based on the ladle size data N, the ladle inclination angle data θ, and the hot water temperature data _H1 from the temperature sensor 38.
The molten metal immersion time, the distance raised above the hot water level to drain the hot water, the time required to drain the hot water after supplying the hot water, and the allowable forward standby time (a certain amount of time) for waiting for a pouring command in the ladle forward standby position. After that time, the temperature of the hot water in the ladle will drop, so return it to the furnace.), the time it takes to drain the hot water until the ladle returns to its position after pouring, and the time it takes to output the injection command after pouring the hot water. Since the operation of the hot water supply mechanism 3 is controlled based on these times, the ladle size is changed, or the amount of hot water in the ladle, the water temperature, the running speed of the water heater, etc. are changed. However, the operation of the automatic water heater can be reliably and easily controlled, the state of the molten metal at the time of injection can be stabilized, and the setup time can be dramatically reduced.

In the above example, setting data such as each operation control time was determined based on the amount of hot water supplied per ladle W and the molten metal temperature data _H1 determined from the ladle size data and ladle inclination angle data. If the temperature of the molten metal in the furnace 2 can be controlled to be constant, it may be determined only from the amount of hot water supplied. On the other hand, if the atmospheric temperature detected by the temperature sensor 39 is taken into consideration in addition to the amount W of hot water supplied and the molten metal temperature data _H1 , there is an advantage that the state of the molten metal can be controlled stably.

In addition, in the above embodiment, the ladle size data,
Setting data such as each operation control time was calculated each time based on the ladle inclination angle data and molten metal temperature data, but for example, each setting data was calculated in advance based on the above data and stored in the memory. It is also possible to leave the data in the memory and read it from the memory each time it is needed.

Furthermore, the present invention is not limited to the hot water supply operation described in the above embodiments, but may be any type having at least an operation of pouring molten metal from a melting furnace into a casting machine according to a predetermined procedure. .

As described above, according to the present invention, each of the above-mentioned operation times is determined from the hot water supply amount data and the operations are controlled based on this, so that the molten metal state during injection can be stabilized and the setup time can be reduced. It is possible to provide an automatic hot water supply device in a machine.

[Brief explanation of drawings]

The figures show one embodiment of the present invention; Fig. 1 is a front view of the hot water supply mechanism, Fig. 2 is a block diagram showing the circuit configuration of the automatic water heating device, Fig. 3 is a memory map of the RAM, and Fig. 4 is a flowchart of the hot water supply mechanism. DESCRIPTION OF SYMBOLS 1... Casting machine, 17... Ladle posture control motor, 19... Ladle travel motor, 32... Automatic water heater, 36... Encoder as an angle detector, 37... Encoder as a position detector, 3
8, 39... Temperature sensor, 40... Hot water supply amount increase/decrease command section, 45... Setting section.

Claims (1)

[Scope of Claims] 1. In order to perform a hot water supply operation in which molten metal from a melting furnace is poured into a casting machine in a predetermined order, a ladle for drawing up the molten metal and a ladle between the melting furnace and the casting machine are provided. a ladle travel motor that moves the ladle back and forth; a position detector that detects the position of the ladle that is reciprocated by the ladle travel motor; a ladle posture control motor that tilts the ladle during hot water supply and pouring; The controller includes an angle detector that detects the angle of the ladle tilted by the ladle attitude control motor, and a controller that controls the operations of the ladle travel motor and the ladle attitude control motor. The immersion time of the molten metal in the furnace, the distance the ladle is raised above the molten metal surface for draining, the time required to drain the hot water after supplying the hot water, and the pouring command from the casting machine when the ladle is in the advanced standby position. The setting data for at least one of the allowable waiting time for waiting, the time for draining after pouring until the ladle returns to its position after pouring, and the time for outputting an injection command after pouring hot water is set in the ladle. An automatic water supply device for a casting machine, characterized in that the automatic water supply device for a casting machine is operated based on data on the amount of molten metal supplied to the casting machine, and controls each of the motors on the basis of the obtained setting data. 2. The automatic casting machine according to claim 1, wherein the controller calculates the setting data based on molten metal temperature data of a melting furnace and ambient temperature data in addition to the hot water supply amount data. Water heater.