JP3324928B2 - Molten casting truck - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention allows a molten metal for casting to be automatically poured into a casting sand mold without excess or deficiency by setting a program in advance. The present invention relates to a vehicle for transporting a molten metal for casting that can enhance work efficiency.

[0002]

2. Description of the Related Art In a casting factory for molding a casting,
A self-propelled transport vehicle such as a forklift equipped with a ladle is used for transporting a molten metal made of a molten metal such as iron, aluminum, and zinc from a furnace to a casting sand mold and pouring the molten metal into the casting sand mold.

[0003] Such a transport vehicle is provided with a tilting tool for tilting the ladle in order to pour the molten metal into the casting sand mold. And pouring it toward the gate of the casting sand mold.

[0004]

However, in such a pouring method, the state of pouring must be monitored all the time, and since the monitoring is performed near the pouring, the monitoring operation is enormous. With danger. For this reason, there has been a growing demand for work improvement in which a worker can perform a pouring operation without approaching the vicinity of a pouring site.

According to the present invention, a tilting tool for tilting a ladle is attached to a carrier for transporting a ladle filled with molten metal.
The tilting of the tilting tool is based on a preset reference and pouring according to a program while comparing the amount of molten metal that is supplied with hot water, without relying on the operator's observation to pour the required amount of hot water. It is an object of the present invention to provide a molten metal carrier for casting that can be automatically performed and can satisfy the above demand.

[0006]

SUMMARY OF THE INVENTION The present invention comprises a receiver into which a molten metal for molding a casting is poured and to which a ladle having a pouring spout can be attached, and which is supplied to a plurality of sand molds for casting. Dissolution
A carrier for a self-propelled molten cast metal in which hot water is poured into the ladle , wherein the lifting device, the receiving device, and the lifting device are mounted on the vehicle body and support the receiving device. A ladle elevating and tilting device having a tilting device for tilting the receiving device and pouring from the pouring port of the ladle is arranged, and the molten metal in the ladle can be continuously measured by the ladle tilting device, and the measured value can be obtained. And a control device capable of controlling the tilting of the tilting device is arranged, and the control device tilts the tilting device at a slow speed and maintains a slow speed signal maintained for a short time after the start. When a tilting instruction step for generating moving a plurality of speed signals and a sequential high-speed signal side to tilt the tilting member at a high speed of one or more stages speed than slow speed, than the tilting instruction step
Repeat the inching motion of the tilting tool at a large tilt angle
It includes a hot water supply instruction step to sustain the hot water supply to sustain the hot water, and a return instruction returning a confirmation after tilting device that hot water supply amount measured has reached the expected value by the weighing instrument by Ukoto, the return instruction step By one casting sand
After pouring into the mold is complete, follow the procedure above to remove other casting sand.
Each casting is performed by pouring the mold in the above steps.
Having a program for repeatedly pouring a molten metal into a casting sand mold , characterized in that the molten metal for molding a casting is filled and a self-propelled molten metal for a casting having a receiving device to which a ladle having a pouring port can be attached is provided. It is a transport vehicle.

[0007] With the above configuration, predetermined pouring can be automatically performed according to a program without the operator directly looking at the state of pouring. Therefore, the monitoring work near the pouring of the worker can be eliminated, and the work safety can be improved,
Work efficiency can be improved.

[0008] ladle is continuous by with molten metal that can be supplied to the plurality of casting sand mold is Note Hama, controller having a program that enables the sequential pouring for each casting sand mold It is possible to pour the molten metal, and the working efficiency can be further improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIGS. 1 to 8, a molten metal carrier 1 is a ladle 2 into which a molten metal M for casting is poured.
Is provided, and the carrier 1 for molten metal for casting is formed so as to be able to run on the floor surface F by itself.

In the present embodiment, the molten metal carrier 1 is
The ladle 2 is detachably mounted on a receiving member 3 formed by a forklift truck. The vehicle 1 for casting molten metal is provided with a power body (not shown) and a rudder 21 so as to be able to move on a floor surface F in any direction. 3 and
A ladle raising / lowering device 7 having a tilting device 6 attached to the lifting / lowering device 5 and tilting the receiving device 3 is provided.

The ladle lifting / tilting device 7 is provided with a measuring tool 9 capable of continuously measuring the weight of the molten metal M stored in the ladle 2.

The power engine is a DC motor which uses a battery (not shown) as a power source in the present embodiment.
By steering the rear wheel 22, the vehicle body 4 can be turned in any direction. In this example, guide rollers 23 are provided on both sides of the vehicle body 4,
The guide roller 23 can roll along a guard N for preventing the traveling of the vehicle body 4 from extremely deviating during the work, and can guide the vehicle body 4 to a running path.

The lifting device 5 includes a mast 24 erected on the vehicle body 2 and an elevating member 26 which can be raised and lowered along the mast 24 by the operation of a telescopic device 25 such as a hydraulic cylinder.

The tilting tool 6 is attached to the elevating member 26 via the measuring tool 9. As shown in FIG. 3 in this example, the weighing tool 9 includes a strain gauge 30 for detecting the displacement of the movable piece 29 between the fixed piece 28 and the movable piece 29 arranged facing the fixed piece 28. By measuring the amount of displacement of the movable piece 29 with a strain gauge 30, the movable piece 2
9, the total weight fixed to 9, ie, the holder 3, the ladle 2, and the ladle 2.
Of the molten metal M can be measured.

The tilting tool 6 is fixed to the movable piece 29 as shown in FIGS. 3 and 4, and protrudes from one side end of a base piece 31 extending in a direction perpendicular to the direction of travel of the vehicle body 4.
3, the tilting piece 32 is pivotally supported. An actuator G is provided between the base piece 31 and the tilting piece 32 for tilting the tilting piece 32 on a plane orthogonal to the vehicle body center line with the pin body 33 as a tilting center. The actuator G is, in this example, a linear expansion / contraction tool composed of a hydraulic cylinder, and is formed so that the expansion / contraction speed can be switched to a plurality of stages.

The base 31 has an I-shaped guide member 3 which is curved in an arc shape around the pin body 33 and has a rib 35a in a direction perpendicular to the base 31.
5 is mounted on the tilting piece 32 with a bearing 36 attached to the tilting piece 32.
a of the guide member 35 supported by the
Rollers 36... That can be rolled along the guide member 35 and the rollers 36 guide the tilting operation of the tilting piece 32.

In the present embodiment, the receiving member 3 is provided with the tilting piece 32.
A fork 37 fixed to the fork 37
The ladle 2 is detachably mounted on the ladle.

The ladle 2 is provided with a pouring port 10 at an upper end of a ladle main body 2A made of metal and at one end thereof. Inside the ladle 2, a molten metal M for casting such as iron, aluminum and zinc is shown. Not taken from furnace and filled.

The ladle 2 is attached with the pouring port 10 facing a position close to the pin body 33 when the ladle 2 is attached to the holder 3.

In the present embodiment, the receiving member 3 can be tilted at an angle α of a tilt range of approximately 50 degrees in the forward direction and 20 degrees in the reverse direction with the pin body 33 as the center of tilt. 2 also tilts to the positive or negative side by the same angle about the pouring port 10.

The measuring tool 9 has a total weight including the ladle 2, the receiving tool 3, the tilting tool 6, and the movable piece 29 of the measuring tool 9 in addition to the weight of the pouring M poured into the ladle 2. The weight of each of the known members is subtracted from the measured values.
Can be calculated.

In this embodiment, the ladle elevating / tilting device 7
And a shift means for shifting the receiver 3 in a direction perpendicular to the vehicle body center line while the vehicle body 4 is kept stationary. The position can be fine-tuned.

The vehicle body 4 is provided with a control device 11 for controlling the tilting operation of the tilting tool 6, and a signal from the control device 11 controls the tilting tool 6 to select a plurality of selected tilting speeds. Thus, tilting in the positive direction and restoration in the negative direction can be performed, and further, it is possible to stop while maintaining the specified tilting angle.

The control device 11 is preliminarily input with a reference program PO determined from the size and shape of the cast object to be formed, and is supplied from the furnace to the ladle 4 and from the ladle 2 to the casting sand mold 13. On the other hand, there is provided storage means for continuously measuring the amount of molten metal poured and storing the measured value. Further, in this example, a display 41 for displaying the amount of the molten metal M stored in the ladle 2 is provided on the vehicle body 4.

The control device 11 includes a slow speed signal for tilting the tilting tool 6 at a slow speed and maintaining the tilt α1 for a short time, a tilt signal for tilting the tilting tool 6 at a speed one step higher than the slow speed, and A tilt instruction step S1 for generating a medium speed signal for maintaining the angle α2 and a high speed signal K3 for tilting the tilting tool 6 at a higher speed than the medium speed and maintaining the tilt angle α3 is provided.

Therefore, in the tilting instruction step S1, the slow speed signal K1 and a plurality of speed signals K2 and K3 for tilting the tilting tool 6 at one or more step speeds higher than the slow speed are sequentially moved to the high speed signal side. It has been raised. As described above, the tilting tool 6 starts tilting at a slow speed first and gradually increases the tilting speed, whereby the ladle 2 can be tilted while suppressing the molten metal in the ladle 2 from vibrating. It is possible to prevent the measuring instrument from being unable to measure due to the vibration, and to prevent the slag generated in the surface portion of the molten metal M in the ladle 2 from being mixed and discharged, and also to improve the work safety and the amount of hot water supply. Accuracy and accuracy. When the tilt angle of the tilting tool 6 becomes α3, the molten metal M starts to be discharged from the pouring port 10 of the ladle 2.

After the molten metal M is started to be discharged in the tilting instruction step S1, the control device 11 further performs the inching operation once or a plurality of times at a slow speed for a short time and at a high speed tilting. A hot water supply instruction step S2 for generating a hot water supply instruction signal for supplying the molten metal M by tilting the tilting tool 6 at a low speed up to the inclination angle α4 larger than the inclination angle α3. By tilting the tilting tool 6 in a short time and repeatedly, the molten metal M
Pouring can be performed continuously without interrupting the flow of the molten metal, and the quality of the molded casting can be improved.

Further, the control device 11 continuously measures the hot water supply amount by the measuring tool 9 and recognizes that the pouring amount has reached the specified value. There is provided a return instruction step S3 for returning to the inclination angle α5 smaller than the inclination angle α4 at the instruction step S2.

The tilting instruction step S1, the hot water supply instruction step S2, and the return instruction step S3 are set in accordance with a reference program determined by the weight and shape of the cast product to be formed, and are automatically and sequentially performed without any operation operation. Done in

In the present embodiment, the control device 11 is instructed to supply additional hot water only when the amount of hot water is insufficient based on the result of measurement by the measuring tool 9 after the return instruction step S3. A hot water instruction step S4 is provided.

In the additional pouring instruction step S4, the controller 11 measures and calculates the weight W1 of the molten metal supplied in the hot water supply instruction step S2, and calculates the weight W1 and the necessary amount for the preset hot water supply. The weight difference (W0-W1) from the expected value W0, which is the weight of the molten metal, is calculated, and only when it is confirmed that the weight difference (W0-W1) exists, the tilting tool 6 is instructed to tilt again, and An instruction for additional pouring is issued to incline at an inclination angle α6 larger than the maximum inclination angle α4 in the hot water supply instruction step S2 .

During the pouring, the measuring tool 9 continuously measures the total pouring amount W from the start of pouring, and when the total pouring amount W becomes equal to the expected value W0, the tilting device 6 tilts. Is stopped, and the actuator G is driven in the reverse direction so that the inclination angle α
The tilting tool 6 is stopped at a tilt angle α7 smaller than 6.

Therefore, under the control of the controller 11, the molten metal M from the ladle 2 can be poured: (1) A reference program PO is set for each cast product to be formed, and the program PO is input to the controller 11. I do. (2) The molten metal M is poured into the ladle 2 from the furnace. During the filling, the measuring section 9 continuously measures and stops the filling when the specified value ΔW is reached. (3) The transport vehicle 1 is moved in front of the foundry sand mold 13. (4) At the initial stage, the tilting tool 6 is tilted at a gentle speed, thereby gradually increasing the tilting speed while preventing the molten metal from vibrating, and disclosing the pouring (tilting instruction step S1). (5) Pouring is performed while preventing the pouring out of water by inching tilt (hot water supply instruction step 2). (6) When the pouring amount W becomes equal to the expected value WO by continuously measuring the loss amount of the molten metal in the ladle 2, the tilting tool 6
Is restored, and pouring is stopped (return instruction step S3). (7) At the time of items (5) and (6), when the amount of pouring water is insufficient, an instruction is made to add pouring water (adding pouring step S4). All of these steps are performed automatically according to a program, not a manual operation. . The operation of each of these steps is shown in FIG.

In this embodiment, an antenna 42 for transmitting and receiving signals relating to the operation of the control device 11 is provided above the vehicle body 4 to enable interlocking operation with related equipment such as the conveyor C.

When the pouring of one casting sand mold 13 is completed, the transporting vehicle 1 for the molten casting metal moves in front of the other casting sand molds 13 that have not been poured yet, and the pouring of the molten metal in the same manner as described above. Repeat until the molten metal M of No. 2 is exhausted.

The amount of the molten metal poured into the ladle 2 is 3 to
It is preferable that the pouring amount is 10 times. In addition, in order to prevent slag from being mixed at the time of pouring, about 5-10
% Of residual hot water is preferred.

As described above, the ladle 2 is filled with the amount of molten metal M that can be supplied to the plurality of sand molds for casting 13, and the controller 11 sequentially injects the molten metal M into each of the sand molds for casting 13. It has a program that can be used for hot water.

The transport vehicle 1 for the molten metal for casting is a casting sand mold 13.
Instead of moving sequentially between the
May be arranged in a fixed position, and the casting sand mold 13 may be intermittently moved in a fixed direction using a conveyor C as shown by a dashed line in FIG. Further, a tongue-shaped locking piece may be provided on the ladle side wall, and the locking piece may be formed so as to be locked to and attached to a vertically-oriented flat-shaped receiver. As described above, the present invention can be changed to various embodiments.

[0039]

As described above, the molten metal carrier for casting according to the present invention has the above-mentioned structure, and the tilting of the control tilting tool is performed based on a preset program. Since the weight loss can be tracked and measured, and the tilting tool can be instructed to tilt, the pouring operation can be automatically performed by the control device without the operator directly looking at the pouring state. As a result, a dangerous monitoring operation near the pouring of the worker can be eliminated, and the safety of the operation can be improved and the operation efficiency can be improved.

[0040] it is possible to pouring continuously against Matafuku number of foundry sand molds, may further enhance the working efficiency.

[Brief description of the drawings]

FIG. 1 is a front view showing an example of an embodiment of the present invention.

FIG. 2 is a plan view thereof.

FIG. 3 is a front view illustrating the measuring tool and the tilting tool.

FIG. 4 is a side view showing the tilting tool.

FIG. 5 is a sectional view taken along line XX.

FIG. 6 is a side view showing the operation of the tilting tool.

FIG. 7 is a plan view showing the pouring action together with a casting sand mold.

FIG. 8 is a graph showing the operation of the tilting tool and the amount of hot water supply over time.

[Explanation of symbols]

 2 Ladle 3 Receiving Tool 4 Body Body 5 Lifting Tool 6 Tilting Tool 7 Ladle Lifting / Tilting Device 9 Measuring Tool 10 Pouring Port 11 Controller 13 Casting Sand Mold M Melt S1 Tilting Instruction Step S2 Hot Water Supply Instruction Step S3 Return Instruction Step

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomofumi Konno 2-1-1 Higashikami-shi, Nagaokakyo-shi, Kyoto Inside Japan Transport Aircraft Co., Ltd. (72) Inventor Junzo Oike 2-1-1 Higashikami-shi, Nagaokakyo-shi, Kyoto (56) References JP-A-7-251240 (JP, A) JP-A-53-19141 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B22D 39 / 00,41 / 00

Claims (1)

(57) [Claims] 1. A casting device , comprising: a receiving member into which a molten metal for molding a casting is poured and to which a ladle having a pouring port can be attached ;
A carrier for a self-propelled molten metal for casting, in which a molten metal supplied to a sand mold is poured into the ladle, attached to the vehicle body, a lifting tool, the receiving tool, and the lifting tool, and A ladle elevating and tilting device having a tilting device for supporting the receiving device, tilting the receiving device and pouring the molten metal from the pouring port of the ladle, and continuously supplying the molten metal in the ladle to the ladle tilting device. in to weigh
And a control device that can control the tilting of the tilting tool is arranged, and the control device tilts the tilting tool at a slow speed and is maintained for a short time after the start. a great slow speed signal that a tilting instruction step for generating moving a plurality of speed signals and a sequential high-speed signal side to tilt the tilting member at a high speed of one or more stages speed than slow speed, than the tilting instruction step Use the tilting
A hot water supply instruction step for maintaining the hot water supply by repeatedly performing the ching operation, and a return instruction step for returning the tilting tool after confirming that the amount of hot water measured by the measuring tool has reached an expected value. Including the pouring into one casting sand mold by the return instruction step
After completion, follow the above procedure for another casting sand mold.
By pouring in each step,
A carrier for a molten metal for casting, having a program for repeatedly pouring molten metal.