JPS617059A - Method and device for obtaining quantity of melting liquid freely selected from metallic melting liquid - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is capable of controlling its height position and/or movement by automatic connection or disconnection of its movement, driven by a motor or hydraulic power.
Or with a ladle whose angular position is adjustable, and with a separate detector.Ladles driven by prior art motors are used in practice in each foundry.

In this type of method and device, the quality of the cast product is highly dependent on the accuracy with which the mold is filled, so
The problem of accurately filling the mold using a ladle arises. In the process of pumping from a liquid metal melt, the adjustment of the depth of immersion of the ladle into the melt is particularly important in determining the amount of pumping that should be accommodated. The ladle is the only one for regulating the mold or ingot mold to the extent that the accommodation of the expected consumption of liquid melt is sufficient to control the melt volume with as little residue as possible. soak it in. This actually amounts to adjusting the pumping depth according to the general estimate. The subsequent mold filling process is likewise inaccurate.

Experience has shown that certain metal melts have extremely corrosive properties and the detectors for generating contact ξ ruses are subjected to such stresses that high wear occurs. .

Moreover, adjusting the mounting of the detector is cumbersome and time consuming. In particular, the detector must be repaired or replaced many times in actual operation, resulting in heavy maintenance time and maintenance costs for continuous operation.

The object of the invention was to make it possible to obtain a freely selected amount of melt from a metal melt without any residue, without the above-mentioned drawbacks appearing any more. The aim is to have no leftovers.
This is because in this case it is no longer necessary to return the cooled residual quantity to the melting furnace.

That is, due to the remaining amount in the ladle, a problem arises in that the remaining amount that is cooled remains in the lower part of the spoon-shaped ladle while the remaining amount normally occurs during the normal scooping process. This results in a mixing temperature with the freshly filled pumping volume.

Thus, in sensitive melts, defects occur in the metallographic structure of the casting piece.

Although it is customary to work in this way in conventional scooping and pouring methods, this is no longer necessary in the present invention. It is only necessary to repeat the process of sinking into the storage volume, for example twice, or to precede the first sinking with a pouring process for the remaining volume. In this case, it is ensured that the contained melt volume has a uniform temperature. This process can be easily pre-programmed according to the invention, so that the structure of the casting remains unchanged.
It is no longer compromised by inter-order.

The object of the invention is to provide a method and a device of the type mentioned at the outset, which allows extremely precise filling of the mold and, in addition, allows casting of different weights in the casting process in small quantities.

Means for solving the problem According to the invention, this problem is solved by determining the various movement courses of the ladle.
The solution is to control by means of defined adjustment settings which are themselves stored in a memory-programmable electronic control unit. The use of memory-programmable electronic control units in methods and devices of this kind has, first of all, the significant advantage of increased flexibility. This is because the pouring amount can be freely selected and can be stored, for example, in a microprocessor. Secondly, the containment and casting process itself can also be controlled and carried out significantly faster and more precisely, which ultimately leads to improvements in the cast product.

While conventional scooping and casting methods usually have to be worked with bath scanners, this is no longer compulsorily necessary in the embodiment according to the invention (the reason for this is that the conductive ladle itself This is because the contact area of the bath surface closes the regulating circuit which is decisive for the free immersion regulating setpoint.

Furthermore, according to the invention, this problem is solved when the ladle, for example in the form of a spoon-shaped ladle, starts from a horizontal starting position at 18
0' and possibly even beyond this if the casting characteristics require, the angle of rotation can be adjusted in fine steps or steplessly by connecting and disconnecting the rotation starter. In this case, the rotary motor emits an adjustment signal in the form of an electronic pulse from the end of the 20th shaft of the drive motor or from a corresponding transmission shaft, which is compared with the respective adjustment setting value of the electronic control device.

In solution, the machine is set up with direct motor control with adjustable settings that can be changed at will even during foundry operations. The height and/or angular position of the ladle during dipping and during the casting process according to the invention allows very precise position settings.

For incremental or absolute value generation, a subsequent electronic .xi. pulse processor can be used in combination with a generator of position data for controlling the positioning of the ladle.

Such generators are rotary pulse generators that work without contact,
an incremental value generator belonging to the prior art as an electrically complete unit with integrated clockwise and counterclockwise rotation detection;
It may also be an absolute value generator, also called an angle encoder, or an electronic time switch clock, which commands a zero position detector in addition to the actual left/right rotation detector.

Embodiment The control device shown in FIGS. 1 to 3 includes a motor 20 composed of a motor and a motor, and an electronic pulse generator 22 is disposed at the second shaft end thereof. There is. The generator is
A control device 50 capable of storing and programming its control signals
The device is controlled by a control having a grinding disk 24 (direct setting device) which is stored in an electronic control unit 50 and which controls not only the scooping process but also the casting process.

In the embodiment of the invention according to FIGS. 1 and 2, the conductive inner body of the ladle 10, 11 is used as a detector; in the special embodiment according to FIG. 3, a separate bath scanner is also possible. Yes, 3 According to the invention, the individual movement processes are freely programmable and independent of local activators.

The spoon-shaped ladle is moved within the working surface 15 indicated by chain lines to the casting position, where casting is performed once (FIGS. 2 and 3) or in small quantities (FIG. 1). .

In the illustration of the method of operation according to the invention using a spoon-shaped ladle according to FIGS. A generator 22 (rotational/ξ ruth, whether an incremental value generator or an absolute value generator), optionally an electronic time controller, emits its control pulses from the 20th shaft end 21 of the motor drive and ξ The electronic control device limits the immersion depth during the scooping process when a certain adjustment set point is reached. The drive motor or the drive device is designed to be adjustable in rotational speed and, in a further special embodiment, to be electronically controllable, so that a motor control independent of the electronic pulse generator is provided. Even if it is to be achieved.

In this case, according to the invention, the electrically conductive ladle 10 may be connected to a voltage generator. For example, when immersing a ladle into the melt, a contact short circuit occurs, and only after this contact short circuit is the counter and the position input device shaft actuated, and when the setpoint value generator 23 is reached, the motor is driven by the setpoint generator 23. The device is shut off. A fraction of a second is sufficient for this, so that very precise and arbitrarily variable scooping and pouring positions can be obtained with this method of operation. Assigned to the adjustment setpoint generator 23 is a keyboard 24 which serves for inputting the adjustment setpoints.

The conventional operating sensitive and abrasive contact rods can be omitted. However, if it is used only during transitional periods, expensive adjustment and coverage costs, as well as operating costs, are significantly reduced. According to the method of operation of the invention, the particular height or low position of the bath level itself (completely or partially filled) is also immaterial.

According to the current state of the art for adjustment, a microprocessor can also be used for adjusting the scooping depth and dosing process according to the program, in which case the start of the adjustment process during the dipping process is caused by a contact short circuit. When a predetermined time value is reached, the motor drive is shut off.

A common understanding of the methods according to FIGS. 1 and 2 is that the electrical quantities, ie voltage and resistance, change with immersion depth. Limiting the adjustment value of the immersion depth can be achieved starting from these variables by setting the electrical measuring device to a measurement value that corresponds to a specific immersion depth. If this immersion depth and with it a certain voltage change or a predetermined resistance is reached, switching off of the activator 20 takes place. However, this method of operation requires careful monitoring of temperature changes or conductivity of switching circuits, with monitoring of the environmental temperature.

In the case of incremental or absolute value generation using a subsequent electronic pulse processor as a generator of production input data for the ladle, the procedure is such that the adjustment value is detected and the point at which it corresponds to the adjustment setpoint is found. In this case, the various values of the desired variable are added to the adjustment value by means of a scale. In this case, it is immaterial whether the adjustment input originates from a counter setpoint or from a higher-order manual setpoint, but is captured, evaluated, and transmitted to the machine as a forced adjustment input, for example by a microprocessor. Ru. From FIGS. 1 to 1, the scooping and pouring angles α are recognized.

7 and 8 show an immersion container 40 instead of the spoon-shaped ladle 11, the filling of which takes place by immersion into the melt through the inlet and outlet ports 43, and the pouring out is adjusted by dipping waste liquid 13 into the pumped volume.

After filling, the melt volume can be metered very carefully due to the sinking of the drained liquid 13. In this case, the movable scoop or dip container O to be submerged acts like a spoon-shaped ladle 11.

The invention represents a clear change in the state of the art fixed casting operations. The mere omission of adjustment operations to adapt the bar detector to wear eliminates interruptions in the casting operation which are always caused by this operation. Casting operations have flexibility and continuity not previously possible. This savings is approximately 1 in one layer.
It reaches 0%. The same advantages also occur during the start-up phase, since the previously mentioned advantages are fully effective here as well.

Thus, the constantly repeated adjustment work is replaced by a changed control setting for the trigger mover according to the invention.

In FIG. 9, a simple time/movement/bath level or immersion position diagram shows how the scooping process can develop. The thick solid line A-B shows the course of the immersion depth in the bath from reaching the bath liquid level to the arbitrarily adjustable immersion position. The dotted line shows the process from the start to the arbitrary casting position (B - bath level, T - depth position sp
stn, immersion depth).

The diagram in FIG. 10 shows the variability in the various dosing steps of the method according to the invention.

The melt is pumped at , 0, where q is the first dosing time and q is the last dosing time.

In the diagram, the line segment A, / B represents the pouring process, BB' represents the reverse movement process of the ladle due to a sudden discontinuation of dosing, and the position of the ladle to the new pouring position C. The change is made and the subsequent casting process is denoted by 0/D and D/
D' represents the course of the backward movement of the ladle due to a sudden discontinuation of dosing. In foundry operation. A low temperature and an important downtime exemption to avoid the residual quantity and its return into the bath can be reliably achieved in this case.

In the case of liquid dispensing, it is possible to work precisely; in this case the diagram shows the curve of the height-adjustable liquid drain 13.

It has been observed that the exemplary process of these inventions allows the system to work with precision not possible with devices according to the prior art.

[Brief explanation of the drawing]

The accompanying drawings show embodiments of the present invention, and include Figures 1 and 2.
3 and 3 are schematic illustrations of the control device with one ladle each shown in the scooping and pouring positions, and FIG. 4 is a schematic illustration of the control device with a ladle in the pouring position, Fig. 5 is a schematic diagram showing the metal melt with the ladle in the scooping position, and Fig. 6 is a schematic diagram showing the spoon-shaped ladle in the casting position with the starter, generator and adjustment setpoint generator. , FIG. 7 is a schematic diagram showing a metal melt in partial cross-section with an immersed draining liquid, and FIG. 8 is a draining liquid with drive by a motor for precision dosing;
Figure 9 shows the time t/movement line diagram for the process of dipping the ladle into the melt, and Figure 10 shows the time t/movement diagram for the process of dipping the ladle into the melt.
FIG. 4 is a time t/movement line diagram for the casting process at two different positions; DESCRIPTION OF SYMBOLS 10... Ladle, 11... Spoon-shaped ladle, 12... Measuring container, 13... Drained liquid, 14... Bath scanner, 15...
... working surface, 20 ... generator (motor with two shaft ends), 21 ... second shaft end'', 22 ... generator (rotation pulse - 1 increment - 1 absolute value generator), 23.
・・Adjustment setting value generator, programming feel P, 2
4... Kettle board, 30... Movement mechanism, Cow O... Immersion container, 41... Immersion depth setting value for filling process, 42...
・Distribution setting value, 4-3... Outlet, 50... Electronic control device with memory programmability, α... Movement angle, α
...Pouring angle position of the ladle in the distribution ■ for small quantities, α ...Pouring angle position of the ladle in the distribution H for small quantities, α ...Arbitrarily adjustable scooping angle position No. 8 Figure 9 and Figure 10 Procedural amendment (method) % formula % 1. Indication of case Patent Application No. 66735 of 1985 2.
Name of the invention Method and device for obtaining a freely selected amount of melt from a metal melt 3 Person making the amendment Case and relationship Patent applicant Hidehide Name Clemens August Verbeek 4, agent 6, subject of amendment ( 1) Drawings (2) Power of attorney

Claims (1)

[Claims] 1. Separate detection using a ladle moved by a motor or hydraulic power, the height and/or angular position of which is adjustable by automatically connecting or disconnecting the mover. In a method for obtaining freely selected amounts of melt from a metal melt, with or without a device, the various movement profiles are controlled by defined adjustments which are stored in a memory-programmable electronic control unit. A method for obtaining a freely selected amount of melt from a metal melt, characterized in that it is controlled by a set value. 2. The slope of the ladle (10) is controlled by the second drive motor (20).
2. A method according to claim 1, wherein a pulse generator is arranged on the shaft end of or on the drive shaft thereof, the pulses of which are adjusted by comparing them with adjustment settings. 3. The method according to claim 1 or 2, wherein the amount adjustment is carried out in one plane by the ladle scooping position and/or by its scooping angle position. 4. The method according to claim 3, wherein the quantity delivery is adjusted by the pouring angle position. 5. The method according to any one of claims 1 to 3, wherein the ladle (10) itself made of a conductive material is used as a contact detector. 6. The method according to claim 1, wherein the adjustment is carried out as a function of the electrical quantity voltage and/or resistance, which varies depending on the immersion depth of the ladle (10). 7. With a ladle moved by a motor or hydraulic power, whose height and/or angular position is adjustable by automatically connecting or disconnecting the mover, or with a separate contact detector; A device for obtaining a freely selected amount of melt from a metal melt without using a metal melt, characterized in that a microprocessor in which defined adjustment settings are stored is used for controlling the movement course. , a device for obtaining a freely selected amount of melt from a metal melt. 6. Device according to claim 7, characterized in that it is provided with a scale board (23) serving for inputting adjustment settings. 9. An electronic pulse generator is connected to the second drive motor (20).
9. The device as claimed in claim 7, wherein the device is arranged on a shaft end (21) of or on a corresponding drive shaft. 10. Device according to one of claims 7 to 9, characterized in that the ladle (10) is associated with a current or voltage generator with a memorizable microprocessor. 11. The drive motor is configured to be able to control the rotational speed.
Apparatus according to any one of claims 7 to 10. 12. Device according to any one of claims 7 to 11, characterized in that the drive device is designed to be electronically adjustable.