CN220805453U - Semi-solid state rheological low-pressure casting equipment - Google Patents
Semi-solid state rheological low-pressure casting equipment Download PDFInfo
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- CN220805453U CN220805453U CN202321196912.1U CN202321196912U CN220805453U CN 220805453 U CN220805453 U CN 220805453U CN 202321196912 U CN202321196912 U CN 202321196912U CN 220805453 U CN220805453 U CN 220805453U
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- 238000005266 casting Methods 0.000 title claims abstract description 66
- 239000007787 solid Substances 0.000 title claims abstract description 55
- 229910052751 metal Inorganic materials 0.000 claims abstract description 52
- 239000002184 metal Substances 0.000 claims abstract description 52
- 239000007788 liquid Substances 0.000 claims abstract description 22
- 239000011261 inert gas Substances 0.000 claims abstract description 19
- 238000009423 ventilation Methods 0.000 claims abstract description 13
- 238000004321 preservation Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 6
- 238000009529 body temperature measurement Methods 0.000 claims 1
- 238000005058 metal casting Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910052786 argon Inorganic materials 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000007790 solid phase Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 229910001338 liquidmetal Inorganic materials 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
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Abstract
The utility model belongs to the technical field of metal casting, and particularly relates to semi-solid rheological low-pressure casting equipment. The semi-solid rheological low-pressure casting equipment comprises an upper die, a lower die, a liquid lifting pipe, an air inlet pipe, an air outlet pipe, a breathable baffle plate provided with a plurality of air holes and a heat preservation furnace provided with an inner space; the ventilation baffle plate is arranged in the inner space and divides the inner space into an upper space and a lower space, and the upper space is filled with metal melt; the air inlet pipe is communicated with the lower space, and the air outlet pipe is communicated with the upper space; the upper die is covered on the lower die, and a die cavity is arranged between the upper die and the lower die; opposite ends of the liquid lifting pipe are respectively communicated with the upper space and the die cavity. According to the utility model, the high-pressure inert gas can be uniformly contacted with the metal melt, so that the compactness of the casting is improved, the grain size of the casting is reduced, and the mechanical property of the casting is improved.
Description
Technical Field
The utility model belongs to the technical field of metal casting, and particularly relates to semi-solid rheological low-pressure casting equipment.
Background
The low-pressure casting is a casting method in which a casting is obtained by filling a cavity with molten metal under pressure (usually 10 to 60 kPa) and solidifying the molten metal. The low-pressure casting method has the characteristics of stable molten metal filling, less gas entrainment, compact casting structure and the like, and the low-pressure casting equipment and the low-pressure casting die are relatively simple and have low input cost. However, the low pressure casting method is not suitable for manufacturing a member having a complicated shape, and has problems such as a long casting cycle, a large structure near a gate position, and the like. Semi-solid rheoforming techniques originate at the end of the 70 s of the 20 th century by filling the mold cavity with a solid-liquid mixed state metal melt (i.e., semi-solid slurry) rather than a molten metal. Semi-solid slurries have higher flow viscosity, less set shrinkage, less tendency to thermally crack than metal liquids; semi-solid state rheoforming elements generally have higher density and mechanical properties than conventional castings and are suitable for the manufacture of complex shaped components. Therefore, the semi-solid rheoforming technology is applied to low-pressure casting, the problem that the shape complexity of the low-pressure casting is limited is hopefully solved, the compactness of the casting is further improved, the grain size is reduced, and the mechanical property of the casting is improved.
In order to transform the metal melt in the cavity of the low pressure casting device into a semi-solid state, it is generally necessary to inject a high pressure gas into the cavity. However, in the prior art, high-pressure gas is generally directly injected into the cavity (as shown in patent application number CN 202210665420.6), and the high-pressure gas is firstly only in contact with a small part of metal melt when entering the cavity, which is not beneficial to the high-pressure gas to drive the whole metal melt to stir, and is further not beneficial to the metal melt in the cavity to be converted into a semi-solid state.
Disclosure of utility model
The utility model solves the technical problem of smaller flow regulation range of the proportional valve and provides semi-solid rheological low-pressure casting equipment.
In view of the above problems, the semi-solid rheological low-pressure casting equipment provided by the embodiment of the utility model comprises an upper die, a lower die, a liquid lifting pipe, an air inlet pipe, an air outlet pipe, a breathable baffle plate provided with a plurality of air holes and a heat preservation furnace provided with an inner space; the ventilation baffle plate is arranged in the inner space and divides the inner space into an upper space and a lower space, and the upper space is filled with metal melt; the air inlet pipe is communicated with the lower space, and the air outlet pipe is communicated with the upper space;
the upper die is covered on the lower die, and a die cavity is arranged between the upper die and the lower die; opposite ends of the liquid lifting pipe are respectively communicated with the upper space and the die cavity.
Optionally, the semi-solid state rheologic low pressure casting device further comprises a lifting driving piece and a frame, wherein the lifting driving piece and the lower die are both installed on the frame, the output end of the lifting driving piece is connected with the upper die, and the lifting driving piece is used for driving the upper die to cover the lower die.
Optionally, the semi-solid state rheologic low pressure casting apparatus further comprises a heating element mounted in the upper space for heating the metal melt in the upper space.
Optionally, the semi-solid state rheologic low pressure casting apparatus further comprises a pressure measuring member mounted in the upper space for measuring the air pressure in the upper space.
Optionally, the semi-solid state rheologic low pressure casting device further comprises a temperature measuring member inserted into the upper space for measuring the temperature of the metal melt in the upper space.
Optionally, the volume of the upper space is larger than the volume of the lower space.
Optionally, the semi-solid state rheological low pressure casting device further comprises an air inlet valve arranged in the air inlet pipe, and the air inlet valve is used for controlling on-off of the air inlet pipe.
Optionally, the semi-solid rheological low-pressure casting device further comprises an air outlet valve arranged in the air outlet pipe, and the air outlet valve is used for controlling the on-off of the air outlet pipe.
Optionally, the semi-solid rheological low-pressure casting device further comprises an air pump, wherein the air pump is communicated with one end of the air inlet pipe, which is far away from the heat preservation furnace, and the air pump is used for inputting high-pressure inert gas into the lower space through the air inlet pipe.
Optionally, an exhaust port is arranged on the upper die and/or the lower die, and the die cavity is communicated with the external environment through the exhaust port.
In the utility model, the high-pressure inert gas is injected into the lower space through the air inlet pipe, and the high-pressure inert gas in the lower space uniformly enters the upper space through the air holes on the air permeable partition plate, so that the inert gas can promote the formation of solid phase particles in the process of rising of the metal melt, and the metal melt in the upper space is converted into a semi-solid state from a liquid state; and the high-pressure inert gas can be uniformly contacted with the metal melt, so that the compactness of the casting is improved, the grain size of the casting is reduced, and the mechanical property of the casting is improved. In addition, the semi-solid rheological low-pressure casting equipment has the advantages of simple structure, low manufacturing cost and low energy consumption.
Drawings
The utility model will be further described with reference to the drawings and examples.
Fig. 1 is a schematic view of a semi-solid state rheologic low pressure casting apparatus according to an embodiment of the present utility model.
Reference numerals in the specification are as follows:
11. An upper die; 12. a lower die; 13. a mold cavity; 2. a lift tube; 3. an air inlet pipe; 4. an air outlet pipe; 5. a breathable separator; 51. ventilation holes; 6. a holding furnace; 61. an inner space; 611. an upper space; 612. a lower space; 62. a metal melt; 7. a lifting driving member; 8. a frame; 9. and a heating member.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It is to be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", "middle", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the utility model.
As shown in fig. 1, an embodiment of the present utility model provides a semi-solid state rheologic low pressure casting apparatus, which comprises an upper mold 11, a lower mold 12, a lift tube 2, an air inlet pipe 3, an air outlet pipe 4, an air permeable partition 5 provided with a plurality of air holes 51, and a holding furnace 6 provided with an inner space 61; the gas-permeable barrier 5 is installed in the inner space 61, and the gas-permeable barrier 5 partitions the inner space 61 into an upper space 611 and a lower space 612, the upper space 611 being filled with the metal melt 62; the air inlet pipe 3 is communicated with the lower space 612, and the air outlet pipe 4 is communicated with the upper space 611; it will be appreciated that the upper space 611 is located above the lower space 612, the ventilation holes 51 are distributed on the ventilation partition board 5, the gas in the lower space 612 can enter the upper space 611 through the ventilation holes 51, and the metal melt 62 in the upper space 611 cannot enter the lower space 612 through the ventilation holes 51.
Further, a ventilation valve may be installed in the ventilation hole 51, and the ventilation valve may allow only gas to pass through or may not allow the metal melt 62 to pass through; the vent holes 51 are nano-sized vent holes, and the vent holes 51 only allow gas to pass through or not allow the metal melt 62 to pass through.
The upper die 11 is covered on the lower die 12, and a die cavity 13 is arranged between the upper die 11 and the lower die 12; opposite ends of the lift pipe 2 are respectively communicated with the upper space 611 and the mold cavity 13. It will be appreciated that the end of the lift tube 2 remote from the mould cavity 13 communicates with the lower part of the upper space 611, and the air outlet tube 4 communicates with the upper part of the upper space 611.
Specifically, first, the prefabricated metal melt 62 is poured into the upper space 611, and the temperature of the metal melt 62 needs to be slightly higher than the liquidus temperature of the corresponding metal (preferably, the temperature of the metal melt 62 is 0 to 20 ℃ higher than the liquidus temperature thereof); then covering the upper die 11 on the lower die 12; injecting high-pressure inert gas into the lower space 612 through the gas inlet pipe 3, allowing the inert gas in the upper space 611 to enter the upper space 611 through the gas holes 51, and allowing the inert gas to drive the metal melt 62 to stir in the upper space 611 and convert the metal melt 62 into a semi-solid metal melt 62; as the gas pressure in the upper space 611 increases, the semi-solid metal melt 62 will enter the mold cavity 13 through the lift tube 2; after the semi-solid metal melt 62 in the mold cavity 13 is completely solidified, the air inlet pipe 3 stops ventilation, the air outlet pipe 4 is conducted to discharge the air in the upper space 611, and the liquid level in the liquid lifting pipe 2 is lowered; finally, the upper die 11 is removed from the lower die 12, and the molded mold part is obtained.
In the utility model, the air inlet pipe 3 injects high-pressure inert gas into the lower space 612, the high-pressure inert gas in the lower space 612 uniformly enters the upper space 611 through the air holes 51 on the air permeable partition plate 5, and the inert gas can promote the formation of solid phase particles in the process of rising of the metal melt 62, so that the metal melt 62 in the upper space 611 is converted from a liquid state into a semi-solid state; and the high-pressure inert gas can be uniformly contacted with the metal melt 62, so that the compactness of the casting is improved, the grain size of the casting is reduced, and the mechanical property of the casting is improved. In addition, the semi-solid rheological low-pressure casting equipment has the advantages of simple structure, low manufacturing cost and low energy consumption.
In an embodiment, as shown in fig. 1, the semi-solid state rheologic low pressure casting apparatus further includes a lifting driving member 7 and a frame 8, where the lifting driving member 7 and the lower die 12 are both installed on the frame 8, an output end of the lifting driving member 7 is connected to the upper die 11, and the lifting driving member 7 is used to drive the upper die 11 to cover the lower die 12. It will be appreciated that the lifting drive 7 includes, but is not limited to, a pneumatic cylinder, a hydraulic cylinder, a linear motor, a screw-nut mechanism, etc. Specifically, the lifting driving member 7 may drive the upper die 11 to move toward a direction approaching or separating from the lower die 12, so that the lifting driving member 7 may drive the upper die 11 to cover the lower die 12 or drive the upper die 11 to open from the lower die 12. In this embodiment, the lifting driving member 7 is designed to facilitate the disassembly and assembly between the upper mold 11 and the lower mold 12.
In an embodiment, as shown in fig. 1, the semi-solid state rheo low pressure casting apparatus further comprises a heating member 9 installed in the upper space 611, the heating member 9 being for heating the metal melt 62 in the upper space 611. It will be appreciated that the heating element 9 includes, but is not limited to, a thermocouple, a heating wire, etc., and that the heating element 9 may heat the metal melt 62 in the upper space 611, ensuring that the temperature of the metal melt 62 in the upper space 611 is slightly above its liquidus temperature.
In an embodiment, the semi-solid state rheologic low pressure casting apparatus further includes a pressure measuring part (not shown) installed in the upper space 611 for measuring the air pressure in the upper space 611. It will be appreciated that the pressure gauge can measure the air pressure in the upper space 611 in real time, ensuring that the air pressure in the upper space 611 is within a suitable air pressure range.
In an embodiment, the semi-solid state rheologic low pressure casting apparatus further comprises a temperature measuring member (not shown) inserted into the upper space 611 for measuring the temperature of the metal melt 62 in the upper space 611. It will be appreciated that the temperature sensing member includes, but is not limited to, a temperature sensor or the like, and that the temperature sensing member may sense the temperature of the metal melt 62 in real time, ensuring that the temperature of the metal melt 62 is within a suitable temperature range.
In one embodiment, as shown in FIG. 1, the volume of the upper space 611 is greater than the volume of the lower space 612. It will be appreciated that the upper space 611 having a larger volume may accommodate more of the metal melt 62; the lower space 612 having a small volume may be formed by uniformly supplying the high-pressure inert gas into the upper space 611.
In an embodiment, the semi-solid state rheologic low pressure casting device further comprises an air inlet valve (not shown in the figure) installed in the air inlet pipe 3, and the air inlet valve is used for controlling the on-off of the air inlet pipe 3. It is understood that the air inlet valve is preferably an electromagnetic valve, and the air inlet valve is used for controlling the on-off of the air inlet pipe 3, so that the convenience of the semi-solid rheological low-pressure casting equipment is improved.
In one embodiment, the semi-solid state rheologic low pressure casting device further comprises an air outlet valve (not shown) installed in the air outlet pipe 4, and the air outlet valve is used for controlling the on-off of the air outlet pipe 4. It can be understood that the air outlet valve is preferably an electromagnetic valve, and the air outlet valve is used for controlling the on-off of the air outlet pipe 4, so that the convenience of the semi-solid rheological low-pressure casting equipment is improved.
In one embodiment, as shown in fig. 1, the semi-solid state rheologic low pressure casting apparatus further includes an air pump (not shown in the drawing) which is connected to an end of the air inlet pipe 3 away from the holding furnace 6, and is used for inputting high-pressure inert gas into the lower space 612 through the air inlet pipe 3. It is understood that high pressure inert gases include, but are not limited to, nitrogen, argon, and the like. In this embodiment, the air pump may inject the high-pressure inert gas into the lower space 612 through the air inlet pipe 3, so as to improve convenience of the semi-solid rheological low-pressure casting device. Further, the flow rate of the high-pressure inert gas injected into the lower space 612 by the air inlet pipe 3 is 1-5 liters/minute; the final solid phase content of the metal melt 62 is 0 to 30%.
In one embodiment, the upper die 11 and/or the lower die 12 are provided with an air vent (not shown in the figure), and the mold cavity 13 is communicated with the external environment through the air vent. It should be understood that the exhaust port may be provided on the upper die 11, the lower die 12, and both the upper die 11 and the lower die 12; the gas in the mold cavity 13 can be discharged to the external environment through the gas outlet, thereby ensuring the quality of the mold in the mold cavity 13 between the upper mold 11 and the lower mold 12.
In one embodiment, a clean 356 aluminum alloy (Al-7 Si-0.3 Mg) melt is poured into the upper space 611 of holding furnace 6 at a holding temperature of 630 ℃. Combining the upper die 11 and the lower die 12; dry nitrogen gas was injected into the lower space 612 from the gas inlet pipe 3 at the bottom of the holding furnace 6, and the flow rate of nitrogen gas was 3 liters/min. Nitrogen in the lower space 612 enters the metal melt 62 from the vent holes 51 in the gas permeable barrier 5, causing the liquid metal melt 62 to be converted into a semi-solid metal melt 62 with a final solid content of 10%. The liquid level casting in the liquid lifting pipe 2 rises, the semi-solid metal melt 62 enters the die cavity 13 through the liquid lifting pipe 2, and solidification molding is carried out after filling. The air inlet of the air inlet pipe 3 is stopped, the air outlet pipe 4 is conducted, the air in the upper space 611 is discharged through the air outlet pipe 4, and the liquid level in the liquid lifting pipe 2 is lowered. The upper die 11 is opened from the lower die 12, and the casting is taken out.
In another embodiment, a clean 357 aluminum alloy (Al-7 Si-0.5 Mg) melt is poured into the upper space 611 of holding furnace 6 at a holding temperature of 625 ℃. The upper die 11 and the lower die 12 are combined. Dry argon was injected into the lower space 612 from the gas inlet pipe 3 at the bottom of the holding furnace 6, and the flow rate of the argon was 2 liters/min. Argon enters the metal melt 62 from the vent holes 51 on the ventilation baffle plate 5, so that the liquid metal melt 62 is converted into the semi-solid metal melt 62, and the final solid phase content of the melt is 5%. The liquid level casting in the liquid lifting pipe 2 rises, the semi-solid metal melt 62 enters the die cavity 13 through the liquid lifting pipe 2, and solidification molding is carried out after filling. The air inlet of the air inlet pipe 3 is stopped, the air outlet pipe 4 is conducted, the air in the upper space 611 is discharged through the air outlet pipe 4, and the liquid level in the liquid lifting pipe 2 is lowered. The upper die 11 is opened from the lower die 12, and the casting is taken out.
The foregoing description of the preferred embodiment of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (10)
1. The semi-solid rheological low-pressure casting equipment is characterized by comprising an upper die, a lower die, a liquid lifting pipe, an air inlet pipe, an air outlet pipe, a breathable partition plate provided with a plurality of air holes and a heat preservation furnace provided with an inner space; the ventilation baffle plate is arranged in the inner space and divides the inner space into an upper space and a lower space, and the upper space is filled with metal melt; the air inlet pipe is communicated with the lower space, and the air outlet pipe is communicated with the upper space;
the upper die is covered on the lower die, and a die cavity is arranged between the upper die and the lower die; opposite ends of the liquid lifting pipe are respectively communicated with the upper space and the die cavity.
2. The semi-solid state rheologic low pressure casting apparatus of claim 1, further comprising a lift drive and a frame, the lift drive and the lower die are mounted on the frame, an output end of the lift drive is connected to the upper die, and the lift drive is configured to drive the upper die to cover the lower die.
3. The semi-solid state rheo logic low pressure casting apparatus of claim 1, further comprising a heating element mounted in the upper space for heating the metal melt in the upper space.
4. The semi-solid state rheo logic low pressure casting apparatus of claim 1 further comprising a pressure measuring member mounted in the upper space for measuring air pressure in the upper space.
5. The semi-solid state rheo logic low pressure casting device of claim 1, further comprising a temperature measurement member inserted into the upper space for measuring the temperature of the metal melt in the upper space.
6. The semi-solid state rheo logic low pressure casting equipment of claim 1, wherein the volume of the upper space is greater than the volume of the lower space.
7. The semi-solid state rheologic low pressure casting device of claim 1, further comprising an air inlet valve mounted in the air inlet pipe for controlling the on-off of the air inlet pipe.
8. The semi-solid state rheologic low pressure casting device of claim 1, further comprising an air outlet valve mounted in the air outlet pipe for controlling the on-off of the air outlet pipe.
9. The semi-solid state rheologic low pressure casting device of claim 1, further comprising an air pump in communication with an end of the air inlet tube remote from the holding furnace, the air pump being configured to input high pressure inert gas into the lower space through the air inlet tube.
10. The semi-solid state rheologic low pressure casting apparatus of claim 1, wherein the upper and/or lower dies are provided with vents through which the die cavities communicate with the external environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321196912.1U CN220805453U (en) | 2023-05-17 | 2023-05-17 | Semi-solid state rheological low-pressure casting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321196912.1U CN220805453U (en) | 2023-05-17 | 2023-05-17 | Semi-solid state rheological low-pressure casting equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220805453U true CN220805453U (en) | 2024-04-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321196912.1U Active CN220805453U (en) | 2023-05-17 | 2023-05-17 | Semi-solid state rheological low-pressure casting equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220805453U (en) |
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2023
- 2023-05-17 CN CN202321196912.1U patent/CN220805453U/en active Active
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