CN114769552A - Antigravity casting apparatus using electromagnetic pump - Google Patents
Antigravity casting apparatus using electromagnetic pump Download PDFInfo
- Publication number
- CN114769552A CN114769552A CN202210500879.0A CN202210500879A CN114769552A CN 114769552 A CN114769552 A CN 114769552A CN 202210500879 A CN202210500879 A CN 202210500879A CN 114769552 A CN114769552 A CN 114769552A
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- heat preservation
- electromagnetic pump
- chamber
- pressure
- pressure accumulation
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- 238000005266 casting Methods 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 229910052751 metal Inorganic materials 0.000 claims abstract description 29
- 239000002184 metal Substances 0.000 claims abstract description 29
- 238000004321 preservation Methods 0.000 claims description 53
- 238000009825 accumulation Methods 0.000 claims description 35
- 238000007654 immersion Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000012946 outsourcing Methods 0.000 claims description 2
- 239000002893 slag Substances 0.000 abstract description 8
- 229910052782 aluminium Inorganic materials 0.000 description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 18
- 238000000034 method Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000003628 erosive effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/08—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled
- B22D17/12—Cold chamber machines, i.e. with unheated press chamber into which molten metal is ladled with vertical press motion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/30—Accessories for supplying molten metal, e.g. in rations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/32—Controlling equipment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention discloses antigravity casting equipment applying an electromagnetic pump, which belongs to the technical field of antigravity casting and comprises a holding furnace and a pressure-accumulating holding chamber, wherein a connecting pipe for metal liquid to flow is arranged between the holding furnace and the pressure-accumulating holding chamber, the electromagnetic pump is arranged on a horizontal connecting pipe and is externally coated with a heat-insulating layer, and a liquid outlet at the top of the pressure-accumulating holding chamber is communicated with an inner cavity of a mold. According to the invention, a pressure-accumulating heat-preserving chamber communicated with one side of a heat-preserving furnace is arranged on one side of the heat-preserving furnace, and a liquid outlet at the top of the pressure-accumulating heat-preserving chamber is communicated with an inner cavity of a mold; an electromagnetic pump is arranged on a connecting pipe between the holding furnace and the pressure-accumulating holding chamber, and the electromagnetic pump drives the molten metal to enter the pressure-accumulating holding chamber from the holding furnace and then enter the inner cavity of the mold. The invention cancels a riser tube structure, and the liquid outlet of the pressure-accumulating heat-preserving chamber is directly connected with the sprue gate of the mould, thereby solving the problems that the molten metal in the riser tube is easy to solidify and the slag is adhered to block the pipeline.
Description
Technical Field
The invention belongs to the technical field of antigravity casting, and particularly relates to antigravity casting equipment using an electromagnetic pump.
Background
Currently, the electromagnetic driving pumps used for antigravity casting can be divided into direct current electromagnetic pumps and alternating current electromagnetic pumps. The direct current electromagnetic drive pump is more efficient than the alternating current electromagnetic pump, so that the direct current electromagnetic drive pump is more suitable for antigravity casting of large aluminum alloy castings. The working principle of the antigravity casting device of the existing direct current electromagnetic pump is shown in fig. 2, in the antigravity casting implementation process of the existing direct current electromagnetic pump 2, as the direct current electrode 3 and the electromagnet (not shown in the figure) are arranged in the liquid lifting pipe 4, the electromagnet works to generate an electromagnetic field acting between the electrodes, and when direct current flows between the electrodes and aluminum liquid (a pump channel), the aluminum liquid generates an upward ampere force. And the aluminum liquid in the heat preservation furnace flows upwards under the action of the driving force of the electromagnetic pump, enters the mold through the vertical riser pipe, is injected into the mold through the riser pipe to fill the mold cavity, and is finally solidified.
However, the existing lift tube has larger height, smaller inner diameter and thinner tube wall. In the operation process of the system, the long-distance transmission easily leads the temperature of the aluminum liquid to be obviously reduced, the residual aluminum liquid flows back into the liquid lifting pipe after the aluminum liquid in the die is solidified, the temperature of the aluminum liquid is also reduced, and if no heat is supplemented, the aluminum liquid is solidified to block the pipeline. In order to supplement heat, the existing liquid lifting pipe generally adopts an external heater to heat the aluminum liquid in the liquid lifting pipe. In addition, in order to ensure the service life of the lift tube, the thickness of the tube wall must be increased, but the thickening of the tube wall causes the external heating efficiency to be slow, and the effect is poor. In addition, the diameter of the slender liquid lifting pipe is small, and molten aluminum reacts with the inner wall of the liquid lifting pipe, so that molten metal is easy to solidify and hang slag in the liquid lifting pipe, a bulge is generated in the pipe wall, the flowing of the molten metal is influenced, and the service life of the liquid lifting pipe is influenced due to the blockage of a pipeline in severe cases; meanwhile, the slender liquid lifting pipe is poor in structural rigidity, and stability of the device is reduced.
Disclosure of Invention
The invention aims to provide antigravity casting equipment applying an electromagnetic pump, and aims to solve the technical problems that molten metal in a riser pipe is easy to solidify, slag is attached to the riser pipe and the pipeline is blocked in an electromagnetic driving antigravity casting device in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides an use antigravity casting equipment of electromagnetic pump, includes heat preservation stove and pressure accumulation heat preservation room, be equipped with the connecting pipe that supplies the metal liquid circulation between heat preservation stove and the pressure accumulation heat preservation room, the electromagnetic pump sets up on horizontal connecting pipe and outsourcing heat preservation, the top liquid outlet and the mould inner chamber intercommunication of pressure accumulation heat preservation room.
Preferably, the electromagnetic pump comprises a pump body and a telescopic magnetic pole, the length of the connecting pipe is matched with that of the pump body, and the connecting pipe and the outside of the pump body are wrapped with heat-insulating layers; the distance between the electromagnet of the telescopic magnetic pole and the electrode can be adjusted, and a heat insulation layer is arranged between the electromagnet and the electrode.
Preferably, the materials of the positive electrode and the negative electrode of the electromagnetic pump are the same, the input end and the output end of the positive electrode and the negative electrode are periodically exchanged, and the current input and the current output of the electromagnet are synchronously exchanged.
Preferably, the volume of the pressure accumulation heat preservation chamber is smaller than that of the heat preservation furnace, and the thickness of the pressure accumulation heat preservation chamber is larger than that of the heat preservation furnace.
Preferably, a plurality of first heaters are arranged in the heat preservation furnace, and a plurality of second heaters are arranged in the pressure accumulation heat preservation chamber.
Preferably, the first heater and the second heater are all immersion heaters, and the immersion heaters are horizontally arranged in parallel at intervals.
Preferably, a liquid outlet at the top of the pressure accumulation heat preservation chamber is in a reverse taper shape, and a small-diameter end of the liquid outlet is communicated with an inner cavity of the mold.
Preferably, the pressure accumulation heat preservation chamber is provided with a liquid level meter.
Preferably, the liquid level meter is a liquid level sensor, and a probe of the liquid level sensor extends to the inner cavity of the pressure accumulation heat preservation chamber.
Preferably, the height dimension of the inner cavity of the pressure accumulation heat preservation chamber is not more than the maximum dimension of the inner cavity in the horizontal direction.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: compared with the prior art, the pressure-accumulating heat-preserving chamber communicated with the heat-preserving furnace is arranged on one side of the heat-preserving furnace, and a liquid outlet at the top of the pressure-accumulating heat-preserving chamber is communicated with the inner cavity of the mold; an electromagnetic pump is arranged on a connecting pipe between the holding furnace and the pressure-accumulating holding chamber, and the electromagnetic pump drives the molten metal to enter the pressure-accumulating holding chamber from the holding furnace and then enter the inner cavity of the mold. The invention cancels a riser tube structure, and the liquid outlet of the pressure-accumulating heat-preserving chamber is directly connected with the sprue gate of the mould, thereby solving the problems that the molten metal in the riser tube is easy to solidify and the slag is adhered to block the pipeline.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of a countergravity casting apparatus using an electromagnetic pump according to an embodiment of the present invention;
FIG. 2 is a schematic view of a countergravity casting apparatus using a DC electromagnetic pump according to the prior art;
in the figure: 00-a mould, 1-a holding furnace, 2-an electromagnetic pump, 3-electrodes, 4-a liquid lifting pipe, 5-an electromagnet, 6-a pressure accumulation holding chamber, 7-a first heater, 8-a second heater, 9-a liquid level meter and 10-a connecting pipe.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, the antigravity casting apparatus using an electromagnetic pump according to an embodiment of the present invention includes a holding furnace 1 and a pressure-accumulating holding chamber 6, a connecting pipe 10 for metal liquid to flow is disposed between the holding furnace 1 and the pressure-accumulating holding chamber 6, the electromagnetic pump 2 is disposed on the horizontal connecting pipe 10 and is externally covered with a holding layer (not shown in the figure), and a liquid outlet at the top of the pressure-accumulating holding chamber 6 is communicated with an inner cavity of a mold 00. In the embodiment, molten metal is molten aluminum, and a heat preservation furnace and a pressure-accumulating heat preservation chamber which are horizontally arranged in parallel are adopted, so that a liquid lifting pipe structure can be omitted, and the phenomena of slag adhering and pipeline blockage are avoided.
In an embodiment of the present invention, the electromagnetic pump 2 includes a pump body and a telescopic magnetic pole, the length of the connecting pipe 10 is matched with the length of the pump body, so as to avoid the long lengths of the connecting pipe and the pump body being unfavorable for the heat preservation of the molten metal, and the outer parts of the connecting pipe 10 and the pump body are wrapped with heat preservation layers; the distance between the electromagnet 5 and the electrode 3 of the telescopic magnetic pole can be adjusted, a heat preservation layer is arranged between the electromagnet 5 and the electrode 3, and meanwhile, the electromagnetic pump is convenient to install and disassemble. When the telescopic magnetic pole is manufactured specifically, the distance between the electromagnet and the electrode can be adjusted by installing a spring, a telescopic rod or other structures between the electromagnet and the electrode, and a proper heat insulation layer is conveniently arranged between the electromagnet and the electrode. When the electromagnetic pump is specifically designed, a large-diameter short-flow channel is adopted for the pump body of the electromagnetic pump, so that the heat of the heat preservation furnace and the pressure accumulation heat preservation chamber can be fully utilized to enable the molten metal flowing through the electromagnetic pump to keep high temperature and not to be solidified. Meanwhile, the whole pump body is sealed by adopting a thick heat-insulating material, so that the molten metal in the pump body is further ensured to keep high temperature, and the service life of the electromagnetic pump is prolonged.
Preferably, the materials of the positive electrode and the negative electrode of the electromagnetic pump 2 are the same, the input end and the output end of the positive electrode and the negative electrode are periodically exchanged, and the current input and the current output of the electromagnet 5 are synchronously exchanged. In the operation process of the electromagnetic pump, the roles of the positive electrode and the negative electrode are automatically controlled by a program to be exchanged according to a certain period, namely, the direct current input end and the direct current output end are exchanged according to a certain period, and the current input and the current output of the electromagnet are exchanged simultaneously, so that the erosion of the metal liquid to the electrodes can be distributed on the two electrodes, and the service life of the electromagnetic pump is prolonged. When the device is designed specifically, the positive electrode and the negative electrode can adopt a mechanical switch or a relay as a switch to realize the exchange of direct current input and output ends, and can be automatically controlled and adjusted through a program.
In the prior art, the anode and the cathode of the direct current electromagnetic pump are generally made of different materials, and the direct current anode and the direct current cathode are not changed in the using process. Therefore, the electrode corrosion of the molten metal is concentrated on the negative electrode, and the service life is short.
In one embodiment of the invention, the volume of the pressure accumulation holding chamber 6 is smaller than that of the holding furnace 1, and the thickness of the pressure accumulation holding chamber 2 is larger than that of the holding furnace 1; a plurality of second heaters 8 are arranged in the pressure accumulation and heat preservation chamber 6. The pressure-accumulating heat-preserving chamber with the volume far smaller than that of the heat-preserving furnace is adopted, and meanwhile, the furnace body with larger thickness is adopted, so that the influence of 'slag adhering' of the molten metal on the service life of the molten metal can be reduced; and a plurality of second heaters are inserted into the pressure-accumulating and heat-preserving chamber, so that the heating efficiency of the pressure-accumulating and heat-preserving chamber can be kept high. The structure and the number of the heaters can be specifically selected according to actual conditions.
Meanwhile, a plurality of first heaters 7 are arranged in the holding furnace 1, and high heating efficiency is ensured in order to keep the temperature of molten metal in the holding furnace.
When the device is specifically designed, the first heater 7 and the second heater 8 both adopt immersion heaters, the immersion heaters are horizontally arranged in parallel at intervals, and are inserted into molten metal in parallel to uninterruptedly heat the molten metal, so that good flowing performance of the molten metal is ensured.
Further optimize above-mentioned technical scheme, the top liquid outlet of pressure accumulation heat preservation room 6 is the back taper, the path end and the mould 00 inner chamber intercommunication of liquid outlet. The inverted cone-shaped liquid outlet can further reduce the influence of metal liquid slag on the flowing of the metal liquid.
In one embodiment of the invention, as shown in FIG. 1, the pressure-accumulating holding chamber 6 is provided with a liquid level gauge 9. Wherein, the liquid level meter 9 is a liquid level sensor, and a probe of the liquid level sensor extends to the inner cavity of the pressure-accumulation heat preservation chamber 6. The liquid level sensor can ensure that the metal liquid in the pressure-accumulation heat-preservation chamber is kept at a set height value.
During the specific manufacturing, the height of the inner cavity of the pressure-accumulating and heat-preserving chamber 6 is not larger than the maximum size of the inner cavity in the horizontal direction. The pressure accumulation heat preservation chamber of the structure is in a short flat shape, and when the inner cavity of the pressure accumulation heat preservation chamber is in a cylindrical or elliptic cylindrical shape, the height of the inner cavity is not more than the size of the inner diameter or the horizontal long axis of the inner cavity; if the inner cavity is a cuboid, the height of the inner cavity is not more than the length of the inner cavity. By adopting the structure, the integral rigidity of the pressure-accumulating heat-preserving chamber can be improved, and the stability of the equipment is improved.
The working process of the invention is as follows:
firstly, preheating the whole system, and heating the furnace body temperature of a holding furnace to a set temperature; injecting the smelted aluminum liquid into a heat preservation furnace and a pressure-accumulating heat preservation chamber; before the back casting begins, the direct current electromagnetic pump is operated, the aluminum liquid of the left holding furnace is firstly injected into the pressure accumulation and heat preservation chamber, and the liquid level of the aluminum liquid in the pressure accumulation and heat preservation chamber is kept at a proper height, namely the pressure accumulation process. The pressure accumulation and heat preservation chamber efficiently adjusts the temperature of the indoor aluminum liquid through a built-in immersion heater so as to ensure that the temperature is in a proper temperature range (namely, the heat preservation process).
When the antigravity casting process begins, the driving force of the electromagnetic pump is increased to quickly inject the aluminum liquid in the pressure-accumulating and heat-preserving chamber into the mold, and the aluminum liquid is solidified and molded under the action of pressure. After pressure relief, the redundant aluminum liquid flows back to the pressure accumulation and heat preservation chamber to readjust the temperature for the next casting and forming.
In conclusion, the pressure accumulating and heat insulating device has the advantages of simple and compact structure and long service life, the pressure accumulating and heat insulating structure without the liquid lifting pipe is adopted, the problem that the flow of molten metal is influenced by the solidification and slag adhering of the molten metal is solved, and meanwhile, the rigidity of the whole device is higher due to the flat pressure accumulating chamber structure, and the stability of the device is improved. The electromagnetic pump adopts telescopic magnetic pole to make things convenient for direct current electromagnetic pump to set up suitable magnetic pole clearance, also makes things convenient for the electromagnetic pump installation, dismantlement simultaneously. The positive and negative electrodes of the electromagnetic pump are made of the same material, and the direct current input and output ends of the electrodes are periodically exchanged in the using process, so that the erosion of the metal liquid to the electrodes is uniformly distributed on the two electrodes, the electrode loss of the electromagnetic pump is reduced, and the service life of the electromagnetic pump is prolonged.
In the description above, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and thus the present invention is not limited to the specific embodiments disclosed above.
Claims (10)
1. Use antigravity casting equipment of electromagnetic pump, its characterized in that: including heat preservation stove and pressure accumulation heat preservation room, be equipped with the connecting pipe that supplies the metal liquid circulation between heat preservation stove and the pressure accumulation heat preservation room, the electromagnetic pump sets up on horizontal connecting pipe and outsourcing heat preservation, the top liquid outlet and the mould inner chamber intercommunication of pressure accumulation heat preservation room.
2. The antigravity casting apparatus using an electromagnetic pump according to claim 1, wherein: the electromagnetic pump comprises a pump body and a telescopic magnetic pole, the length of the connecting pipe is matched with that of the pump body, and the connecting pipe and the outside of the pump body are wrapped with heat-insulating layers; the distance between the electromagnet of the telescopic magnetic pole and the electrode can be adjusted, and a heat insulation layer is arranged between the electromagnet and the electrode.
3. The antigravity casting apparatus using an electromagnetic pump according to claim 2, wherein: the materials of the positive electrode and the negative electrode of the electromagnetic pump are the same, the input end and the output end of the positive electrode and the negative electrode are exchanged periodically, and the current input and the current output of the electromagnet are exchanged synchronously.
4. Antigravity casting apparatus using electromagnetic pumps, according to claim 1, characterized in that: the volume of the pressure accumulation heat preservation chamber is smaller than that of the heat preservation furnace, and the thickness of the pressure accumulation heat preservation chamber is larger than that of the heat preservation furnace.
5. Antigravity casting apparatus using electromagnetic pumps, according to claim 4, characterized in that: the heat preservation furnace is internally provided with a plurality of first heaters, and the pressure accumulation heat preservation chamber is internally provided with a plurality of second heaters.
6. Antigravity casting apparatus using electromagnetic pumps, according to claim 5, characterized in that: the first heater and the second heater are immersion heaters which are horizontally arranged in parallel at intervals.
7. The antigravity casting apparatus using an electromagnetic pump according to claim 1, wherein: the liquid outlet at the top of the pressure accumulation heat preservation chamber is in an inverted cone shape, and the small-diameter end of the liquid outlet is communicated with the inner cavity of the mold.
8. The antigravity casting apparatus using an electromagnetic pump according to claim 1, wherein: the pressure accumulation heat preservation chamber is provided with a liquid level meter.
9. Antigravity casting apparatus using electromagnetic pumps, according to claim 8, characterized in that: the liquid level meter is a liquid level sensor, and a probe of the liquid level sensor extends to the inner cavity of the pressure accumulation heat preservation chamber.
10. Antigravity casting apparatus using electromagnetic pumps according to any of claims 1 to 9, wherein: the height dimension of the inner cavity of the pressure accumulation heat preservation chamber is not more than the maximum dimension of the inner cavity in the horizontal direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210500879.0A CN114769552A (en) | 2022-05-09 | 2022-05-09 | Antigravity casting apparatus using electromagnetic pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210500879.0A CN114769552A (en) | 2022-05-09 | 2022-05-09 | Antigravity casting apparatus using electromagnetic pump |
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| Publication Number | Publication Date |
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| CN114769552A true CN114769552A (en) | 2022-07-22 |
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| CN202210500879.0A Pending CN114769552A (en) | 2022-05-09 | 2022-05-09 | Antigravity casting apparatus using electromagnetic pump |
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