JPS6087966A - Scooping-out and metering ladle metering device precisely metering meltage, which can be adjusted variably, of metaliic melt - 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 The present invention consists of a metering vessel and an outlet hopper, a discharge body and a regulating drive with parallelogram links, which can be used to variably control a metal melt using a rotary pulse counting device or an electric weighing scale. The present invention relates to a ladle measuring device in which a precision meter pumps out and measures an adjustable melt amount.

Ladle metering devices of this type are basically used in engineering for the production of molded bodies made of melts that solidify at room temperature.

It is already known from German Patent Application No. 1 165 210 of September 29, 1961 to provide a hollow discharge piston for a metering device of the type intended for use with metal melts, in which said piston is provided with its downward movement. During this process, the surface of the metal melt is pushed up above the outlet trough and the outflowing metal melt is roughly metered in a divisible push-up stage. Such ejection pistons are usually also heated.

Furthermore, it is known from GB 1,542,054 to use a ladle weighing device of general design without any weight balance. Kalancraate is mandatory for the weight balance of the precision stage.

In addition, it is well known to trigger the switching process for the overcoming part by activation of a non-contact mechanical final position switching device. A final position switching device is then installed at the required switching point. The deficiencies of these devices are such that when frequent fluctuations in the switching position are required, e.g. when the dosing volume is varied, the pulse fluctuations have to be carried out even by local fluctuations in the position of each pulse transmission device. Become. In this case, further devices must also be shut down I7, which presupposes an interruption in the production operation which affects the performance per unit time.

Furthermore, conventional weighing devices have common general-purpose parallelogram links, which are similar to parallelogram link arrangements, the movement of which is transmitted by gears or racks. An example thereof is the solution according to German Patent Application No. 1758425 of May 29, 1968.

The invention provides, inter alia, an analog input of the control value into the required control device of the metering drive by means of a rotary pulse counting device, which can be freely programmed according to the desired amount of melt, without interrupting and therefore disturbing the production process. By doing so, all of these above-mentioned defects are prevented.

The present invention provides for dispensing flowable metered material pre-provided by industrial processing methods to the outlet of the device according to the invention automatically and with the greatest possible speed using a dispensing piston with very precise and precise metering. This is generally considered an issue.

In order to solve this problem, the invention consists of a metering vessel, an outlet hopper, a discharge body and an adjusting drive with parallelogram links, which can be variably adjusted for the metal melt using a rotary pulse counting device or an electric balance. Precisely measuring the amount of melt, pumping out and weighing starts from a ladle meter device, which metering device is equipped with a motor-driven adjustable oscillating device in the form of a parallelogram link with a counterweight, and another with a cam disc. It is characterized in that an adjustment drive and an inineator are combined.

In an advantageous embodiment of the invention, the drive motor serving the adjusting drive has a second end connected to a cam disk, the cam disk serving as a pulse transmission device to the initiator, and the assembly of these devices. A counting device, and in some cases an electronic counting device, is installed after the machine.

The weighing vessel itself can also be connected to a recording power sensor, which is followed by a pulse-emitting scale.

In a particularly advantageous device according to the invention, the metering vessel is provided with a voltage transmission device having a resistance measuring device which itself provides a control pulse for the immersion depth of the metering vessel in the melt.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

1 to 5 schematically show a lifting and rotational drive according to the invention in detail and in partial views.

The ladle weighing device 10 consists of a rocking device 20 , a parallelogram link 22 with a counterneedle 22 according to the invention, a part 23 of the parallelogram link close to the weighing container, and in a part 25 the region of the discharge device 60 . A discharge bin 61 is provided for discharging the remaining residue.

2nd R+! The a 915 drive 30 has, according to FIG.

A discharge piston 44 opens into a metering container 40, as shown in FIG.
1 cooperates with the measuring container.

In embodiments of the invention, the metering container can be heated. This kind of heating device 421-t is necessary when rapid cooling of the molten material, which affects the flowability, has to be feared.

According to a special feature of the invention, the metering container is provided with an opening 51 in the side wall, which opening extends vertically into the slot 1.1.
It is used to inject the melt into the collapsible and sieve viewing equipment.

According to another embodiment of the invention, voltage transmission 45 to this metering vessel
0 is connected and this transmitter applies tFtE intermittently or constantly. The measuring device connected to this part of the invention then provides a resistance control value which can be evaluated against the control tolerance via the height of the surface of the melt.

Special problems arise when draining residual quantities.

This is because it is desirable to measure the molten material contained in the measuring vessel in such a way that the final discharge of the melt amount is such that the measuring vessel is also completely discharged. For this purpose, in the part 23 of the parallelogram link 21 close to the weighing container, an ejection device 60 is provided, which allows the weighing container to be tilted around a lowered fulcrum by means of a removable ejection bin 61. This allows for complete discharge.

For this functional sequence, it is preferred that the lifting drive as well as the rotary drive also have their own pulse transmitter. In the illustrated Yumio side of the invention, this is a cam disk 52 in the adjustment part wJ device, which is fixed in place as a conductor and a pulse for which the rotational pulse of the disk is preferably produced without contact. It is effectively detected by the provided inishake 34 and is therefore fed to the counter ff133. Counting device 3! + causes the motor drive to be shut off when adjusting the predetermined control value. Therefore, each position is accurately determined.

This interruption is extremely short with current technological means1.
Things can be done instantly and with high reliability.

The rotating, lifting and oscillating movements required from this function can now be carried out accordingly, for example, even during bulk metering movements in rotary table operation, where normal operation is interrupted or even assembly operations are interrupted. There is nothing that must be done.

Therefore, the measurement accuracy can be corrected during operation. According to the invention, the individual control devices are freely programmable and therefore independent of conventional local pulse detectors. The automatic progression position change #+ can only be initiated by a push button process inside the switching box.

In addition to the scooping spoon principle, each of the control methods according to the invention introduces a metering process by immersing the cylindrical container 40 into the melt. The metering container 40 is provided with a downwardly sloping outlet hopper and a side opening 43 which may be in the form of a slit. 43 of these openings are defined to allow the molten quantity to flow in. Inside the container containing the melt, a discharge piston 44 of cylindrical type is then provided, which piston is connected to the adjusting drive 5.
When operating 0, the volumetric evacuation allows a predetermined amount of melt to flow out with great precision. This is because the counting device 35 counts the corresponding control value according to the melting amount through the initiator 54 and the cam disk 32 by means of rotating pulses, and at the end, a predetermined return value is obtained since the metering is rapidly interrupted in a pulsed manner. This means that the ejection motor of the adjusting drive remains switched on during the metering process until the adjusting drive is switched over. The fact that the different melting quantities can be adjusted in a variable and programmed manner allows changes to be made accordingly and even during operation to adjust the metering accuracy.

This volume evacuation can be carried out differently. - In some cases, this discharge can take place by means of the already described cam disk with an associated counting device, but it can also take place by means of a scale, in which case a taring device is necessary. The predetermined weighing weight is measured by the ejection motor,
The motor is turned on until a total of 6 t-i flows out. The ejection motor is then switched off via a control signal by the scale itself. After a predetermined metering interruption has elapsed, the motor is switched on again and a new predetermined amount of melt can be dispensed. This process can be repeated continuously until the adjusted minimum weight value is achieved and the ejector returns to its initial position. This electronic weighing is particularly advantageous when quantities have to be measured with great precision. The device as a whole is capable of detecting false measurements and therefore automatically correcting them.

Another advantageous possibility for interval control of the pumping and of the immersion depth is, as shown in FIG. This is achieved by what is being done. As the metering container is immersed and filled, the electrical resistance varies with the immersion depth reading. A simple resistance measuring device is entered with a preselected measurement value, which value corresponds to a predetermined immersion depth and switches off the motor uplift drive, thus reducing the immersion depth and the associated melt flowing out. Limit quantity. With this method of operation, an optimum pumping position can be achieved in each case and bath displacements are kept as low as possible, thus avoiding the risk of air inclusions in the final product which is to be regenerated. The contact rods otherwise required for normal bath surface scanning can be eliminated. This is because the control pulses of the motor drive are now determined by the value of the immersion depth. Therefore, the position of the bath surface in the case of a crucible furnace that is then filled or partially emptied is also not critical.

With the present invention, fine step adjustment can be achieved. However, it is important to note that the mass of the parallelogram structure is compensated by the counterweight, so that the smallest adjustment force can be carried out practically without mass, in other words with the minimum in overcoming a given inertial force. This is possible only if

According to the invention, this can be accomplished by a counterweight 22. This counterweight allows for minimal energy consumption in overcoming the inertia of the parallelogram link mass. This is because the counterweight design effectively compensates for the mass.

Intermediate states between completed states of the technical type that are not exhausted in determining the switching position of the completed states have not been detected by the control process so far.

The invention therefore set the task of similarly detecting the control intermediate range between the switching positions.

The starting point here is to assume that each displacement transmitter has a motor, a drive, which is adjusted according to the state of the art in accordance with the duration and speed of the displacement course during uniform displacement. Therefore, it is generally known in the art to start or end mechanical movement by turning on or off a motor.

According to the current state of the art, switching processes of this type are thoroughly multiplexed, but are triggered by the activation of contactless mechanical start and end switching devices; It is set so that it can be changed by. Variations in the switching position fiffi are then only possible if the pulse transmission device is also frequently varied. It requires time consumption which interferes with and affects the rational course of the operating process. However, proposals have been made to trigger the complete position switching device in such a way that rotational pulses are transmitted to the detector, and this transmission takes place centrally and contactlessly.

The present invention solves this additional problem by using a pulse transmission device, e.g. a cam disk, for the rapid switching process of the reaction to different cutting speeds of controlled assemblies of inventive or design. In this case, this pulse transmission device
The second disc can also be used as a disc with a switching cam and as a perforated disc.
Another configuration of the shaft end is that it can be configured as a disk with a key bushing and a 17-bored outer cylinder.

The center of gravity of the invention is then all the processes that take place between the start-up phase and the termination phase, and in particular the different speeds between these two system stages are detected.

In this case, the variable positioning of the devices used with these proposed solutions is resolved between the input point and the disconnection point.

The practical function of the invention is as shown in FIG.
Starting from an electric motor with a second shaft end 61 . At this shaft end there is a pulse transmission device 52 which engages a switching cam 55. The motor pulse is, for example, 1000
It can be rev/min or 25 rev/sec. This / Kurusu is the disk of the pulse transmission device (cam disk! +2)
It is accepted into an initiator 54 without contact, and a counting device 35 is combined with this initiator. A desired adjustment value and a predetermined count value are also given to this counting device in advance. When the set value is reached, the drive is switched off by means of a control signal, so that the movement process is interrupted. This basic control type can now also be applied to the control of different travel speeds. The result of such a signal is that, with appropriately adjusted counts or control values, the machining sweep can be switched from slow machining to fast machining, or vice versa.

This can in principle be changed in electric motors with a large number of pole pairs and a correspondingly small number of armatures.

When using a motor that can change the number of poles,
Similarly, no changes are made. In such a case, it is sufficient, for example, to provide a pulse transmission device '52 with a matching number of switching cams 35. This adaptation significantly improves accuracy.

Practically no limits are set by the solutions of FIGS. 4' to 7 of the precision of the control operation. This is because the pulse detector (initiator 34) responds in a very short instant. A conventional counting device was also designed with a pulse interval of 50 to already trigger the control pulse.
Hi to 500H2f is sufficient.

Another example of the configuration of the pulse transmission device is the sixth and seventh
5 shows a pulse disk with a plurality of recesses 57, and FIG. 7 shows a cylinder 6 with a plurality of holes 59f.
9 is shown, while in FIG. 6 a key bushing is shown which is provided at the second shaft end 51 and is secured by a removable screw connection.

FIG. 8 shows two inishakes 34 located externally around the pulse disk 320 and spaced apart from each other. These initiators are used for detecting and controlling right and left rotation by accepting and sequentially evaluating the pulses of both initiators during concentric rotation of the pulse transmission device.

The frequency diagram in Figure @9 shows the phase displacement and response time interval (phase deviation) due to those initiators.

With the proposed solution of the invention, switching processes with extreme precision can be carried out instantaneously.

In this case, the control of the movement course is detected as appropriate in practice. This device can therefore be used in most cases of the type of work called by the common name technical robots. Now, for example, if a pressure point is placed at a distance,
The automatic robotic welding machine can be controlled to control the pulse welding sequence for detecting different welding points with particular precision.

In summary, with this device it is possible to accurately detect the final position at which motor stopping begins and ends. However, all conceivable movement processes between these final positions in time and/or location are also detected. The privilege of controlling this device is then carried out by a conventional gear board mounted in the switch box or switch cabinet.

[Brief explanation of the drawing]

Figure 1 is a side view of a pumping metering device with a lifting device, Figure 2 is a schematic side view of a cam disk with an initiator and a counting device, and Figure 3 is a ladle metering device with a metering container and a discharge device. FIG. 4 is a side view and plan view of a cam disk with a deep cam cut at the periphery of the disk and normal to the disk; FIG.
The figures are a side view and a top view of a disk with multiple holes that emit pulses as seen from a non-contact scanning device, FIG. 6 is a side view and a top view of a disk with multiple recesses used as a pulse transmission device, Figure 7 is a side view and plan view of a disc with multiple holes provided as pulse passages and a cylinder attached, Figure 8 is a pulse transmission device with two initiators, Figure 9 is a This is due to frequency. 22...Counterweight 30...B11 section drive device 32...Cam disc 54...I1'1τ of the initial shake drawing (no change in content) Fig. 1 Fig. 2 Figure 4 Procedural Amendment (Method) Showa Data year? Manabu Shiga, Commissioner of the Patent Office, 1st month! Display of II case Showa, <7th year patent application No. / Ota θ2 Gri3 Relationship with the case of the person making the amendment Applicant 4 Agent 5, B 1ift )j 1lrtt of the amendment order

Claims (1)

[Scope of Claims] 1. Variably adjustable melting quantity of the metal melt, consisting of a metering vessel, an outlet hopper, a discharge body and an adjusting drive with parallelogram links, using a rotary pulse counting device or an electric balance. For precisely metered pumping and weighing, in the Shibe weighing device, a counterway 1-(22) is provided outside the parallelogram frame with parallelogram links provided far from the weighing container and extending beyond the branch. A ladle weighing device characterized in that a cam disk (52) having an initiator (54) is combined with a ratio adjusting device (30). , +-471± (2) Pulse transmission 1 cam disk (32) with a cam pin (35) provided parallel to the center via the second shaft end (31) with the adjustment bag/mount (60) The ladle meter according to claim 1, characterized in that a counting device (33) is disposed after the initiator (54) that drives the ladle counter. Nanaba 10 + f zoki → 1 → 5 The measuring container (40) is combined with a resistance measuring device (51) or a counting device which itself provides a control pulse for the depth of immersion of the measuring container (40) into the melt. 2. A second metering container according to claim 1 or 2, characterized in that: −＋−M−
6-Figure → 4. Power sensor (41) recorded by measuring container (40)
Claims 1 to 5, characterized in that the seven scale scale (45) is connected to the
Ladle metering arrangement R6-←祁=トFig.廿5 The metering container is configured as a cylinder with a cylindrical wall and a plurality of filling openings (45). A ladle measuring device according to one of the ranges 1 to 4. Claims 1 to 5, characterized in that the measuring container (40) is equipped with a heating device (42).
To9be weighing device described in . Mot 111→-Z The weighing container (40) is rotatably fixed on the one hand in the part (23) of the parallelogram link (21) close to the weighing container and on the other hand the key or ejection bin (61)
7. A ladle measuring device according to claim 1, wherein the ladle measuring device is fixed such that it can be rotated, removed and fixed using a holder. The pulse transmission device (32) is characterized in that it is applied to different working speeds for reaction-fast switching processes, as well as to fixing positions that differ in time and location. A weight measuring device according to one of claims 1 to 7. 9. Ladle weighing device according to one of claims 1 to 8, characterized in that the pulse transmission device (52) is constructed as a disc with a switching cam. 11], the pulse transmission device (32) is constructed as a perforated disk.
A ladle weighing device according to one of paragraphs 1 to 8. 11. A ladle measuring device according to any one of claims 1 to 10, characterized in that the second shaft end is constructed as a key bush. 12. Ladle metering device according to one of claims 1 to 11, characterized in that the pulse transmission device is constructed as a disk with a perforated outer cylinder. I. Ladle weighing according to one of claims 1 to 12, characterized in that two inineators are provided at a distance from the periphery of the disk and spatially separated from each other. Device.