CN117684167A - Method and device for effectively avoiding cracks of casting wax mould - Google Patents
Method and device for effectively avoiding cracks of casting wax mould Download PDFInfo
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- CN117684167A CN117684167A CN202311377616.6A CN202311377616A CN117684167A CN 117684167 A CN117684167 A CN 117684167A CN 202311377616 A CN202311377616 A CN 202311377616A CN 117684167 A CN117684167 A CN 117684167A
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- Prior art keywords
- wax
- wax pattern
- aluminum alloy
- metal liquid
- sealing space
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005266 casting Methods 0.000 title claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 36
- 239000002184 metal Substances 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 31
- 229910000838 Al alloy Inorganic materials 0.000 claims abstract description 29
- 239000000843 powder Substances 0.000 claims abstract description 27
- 230000005684 electric field Effects 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000005336 cracking Methods 0.000 claims description 8
- 238000007873 sieving Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 2
- 239000011241 protective layer Substances 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000005672 electromagnetic field Effects 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
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- Physical Vapour Deposition (AREA)
Abstract
The invention relates to a method and a device for effectively avoiding cracks of a casting wax mould, wherein aluminum alloy powder is heated, melted and vaporized in a vacuum environment, and then condensed to form metal liquid drops, the metal liquid drops are positioned above the surface of the wax mould (2), the metal liquid drops are dragged to the surface of the wax mould (2) through an electric field of eddy current formed above the surface of the wax mould (2) by an electromagnetic generator (5), and the metal liquid drops (3) are quickly cooled and form a uniform aluminum alloy film after contacting the surface of the wax mould (2) so as to avoid the cracks of the wax mould (2).
Description
Technical Field
The invention relates to a method and a device for effectively avoiding cracks of a casting wax mould, belonging to the technical field of wax mould manufacturing in a casting process.
Background
Currently, researchers at the russian salatoff national university of technology have developed a new process for applying ultra-hard titanium carbide coatings to the working surface of metal tools to slow wear and increase the useful life of the material. The hardness of pure metals and carbon-containing alloys can be multiplied by tightly controlling the temperature during the experiment, the power of the induction heating device, the spraying distance and the duration of the protective layer.
On the basis, the foreign titanium-containing protective coating is widely applied to the fields of medical appliances, microelectronics, electromagnetic radiation detectors and the like. The film is about twenty times thinner than human hair, can prevent rapid abrasion of metallic materials, and improves biocompatibility. In most cases, these coatings are applied to the work surface by vapor deposition, where the vapor phase is a cluster of titanium, i.e., interconnected groups of atoms. To form such a particle stream to form a film, the process is performed in a vacuum heating environment at 1200-1250 ℃. However, this method tends to cause cracking of the protective layer or metal substrate of the product, thereby degrading the quality of the product.
Disclosure of Invention
The invention adopts the research results and potential problems, and applies the research results and potential problems to the manufacturing technology of the wax mould in the casting process, and designs and provides a method and a device for effectively avoiding cracks of the casting wax mould.
The aim of the invention is realized by the following technical scheme:
according to the technical scheme, the method for effectively avoiding cracks of the casting wax pattern is provided, aluminum alloy powder is heated, melted and vaporized in a vacuum environment, then condensed to form metal liquid drops, the metal liquid drops are located above the surface of the wax pattern 2, the metal liquid drops are dragged to the surface of the wax pattern 2 through an electric field of eddy current formed above the surface of the wax pattern 2 by an electromagnetic generator 5, and the metal liquid drops 3 are quickly cooled and form a uniform aluminum alloy film after contacting with the surface of the wax pattern 2 so as to avoid cracks of the wax pattern 2.
In implementation, the powder granularity of the aluminum alloy powder is-400 to-450 meshes.
In practice, the interior of the wax pattern 2 is supported by a rigid material to ensure the flatness of the surface of the wax pattern 2.
In implementation, the aluminum alloy powder is vaporized in an ultrasonic mode after being heated and melted.
In implementation, the wax mould 2 is preheated before the aluminum alloy film is prepared on the surface of the wax mould 2, and the preheating temperature is 40-60 ℃.
In practice, the thickness of the aluminum alloy film is 10-20 micrometers.
The technical scheme of the invention also provides a device for effectively avoiding the cracking of the casting wax mould, which is characterized in that a wax mould heating device 1 is arranged at the bottom of the wax mould 2, a vacuum sealing space I3 is arranged above the surface of the wax mould 2, the vacuum sealing space I3 is used for filling metal liquid drops, an electromagnetic generator 5 is arranged above the vacuum sealing space I3, the side surface of the vacuum sealing space I3 is connected with one end of a metal liquid drop guide path 4, the other end of the metal liquid drop guide path 4 is connected with a condenser 8, another vacuum sealing space II 10 is arranged below the condenser 8, the vacuum sealing space II 10 is used for filling aluminum alloy powder, an ultrasonic rotary table 6 is arranged at the bottom end of the vacuum sealing space II 10, a heating device 7 is arranged at the side surface of the vacuum sealing space II 10, and a sieving device 9 is arranged between the vacuum sealing space II 10 and the condenser 8.
In the implementation, when the aluminum alloy powder is vaporized by an ultrasonic mode after being heated and melted, the rotating speed of the ultrasonic rotary table 6 is 60-120 rad/s, and the heating temperature of the heating device 7 is increased to 2400-2600 ℃.
The technical scheme of the invention has the characteristics and beneficial effects that:
1. the scheme of the invention provides a method for protecting cracks of a casting wax pattern, which is characterized in that aluminum alloy powder is liquefied, vaporized and condensed by means of temperature and electromagnetic field and is paved on the surface of the wax pattern to prevent the wax pattern from generating cracks.
2. In the scheme of the invention, the forming process of the metal protective layer on the surface of the wax film is different from vapor deposition, and is carried out at 40-60 ℃ aiming at the physical characteristics of the wax film, so that the defects of cracks, melting and the like of the wax film substrate can not occur in the whole process.
3. In the scheme of the invention, the metal protective layer can be uniformly paved on the surface of the wax film, the metal liquid drops with small enough volume and the electromagnetic field generated by the electromagnetic generator are screened by the screening device to ensure that the metal liquid drops are in coupling connection with the electromagnetic field at the moment of entering through the guide path, and the metal liquid drops are paved on the surface of the wax film.
Drawings
FIG. 1 is a schematic view of a device according to the technical scheme of the present invention
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the attached drawings and examples:
in this embodiment, as shown in fig. 1, the device for avoiding cracks of a cast wax pattern by adopting the method of the present invention is implemented by adopting the device, wherein a wax pattern heating device 1 is arranged at the bottom of a wax pattern 2, a vacuum sealing space i 3 is arranged above the surface of the wax pattern 2, the vacuum sealing space i 3 is used for filling metal liquid drops, an electromagnetic generator 5 is arranged above the vacuum sealing space i 3, the side surface of the vacuum sealing space i 3 is connected with one end of a metal liquid drop guide 4, the other end of the metal liquid drop guide 4 is connected with a condenser 8, another vacuum sealing space ii 10 is arranged below the condenser 8, the vacuum sealing space ii 10 is used for filling aluminum alloy powder, an ultrasonic rotary table 6 is arranged at the bottom end of the vacuum sealing space ii 10, a heating device 7 is arranged at the side surface, a sieving device 9 is arranged between the vacuum sealing space ii 10 and the condenser 8, and the method of the present invention is implemented by adopting the above device:
step one, preparing a wax pattern
Preparing a steel plate, preheating the steel plate to 200-300 ℃, putting the steel plate into a wax pool, taking out, standing and cooling to finish the wax mould 2;
step two, powder preparation
Preparing pure pollution-free aluminum alloy powder, wherein the granularity of the powder is-400 to-450 meshes, and placing the powder into a vacuum airtight space II 10 of the device;
step three, liquefying the powder
Starting an aluminum alloy powder heating device 7 to heat aluminum alloy powder at 700-800 ℃, starting an ultrasonic rotary table 6 after the aluminum alloy powder is in a molten state, and then increasing the heating temperature of the heating device 7 to 2400-2600 ℃, wherein the molten aluminum alloy powder starts to be partially vaporized, and the vaporized aluminum alloy powder passes through a sieving device 9 and is liquefied into metal liquid drops after encountering a condenser 8;
step four, powder sputtering
The liquefied metal liquid drops of the aluminum alloy powder flow downwards through the metal liquid drop guide way 4 and enter the vacuum closed space I3, at the moment, the wax pattern heating device 1 is started to preheat the wax pattern 2, the preheating temperature is 40-60 ℃, the electromagnetic generator 5 is started at the same time, the electromagnetic generator 5 forms eddy current above the wax pattern 2, the electric field drags the metal liquid drops to the surface of the wax pattern 2, and when the metal liquid drops are contacted with the surface of the wax pattern 2, the metal liquid drops are rapidly cooled and spread on the surface of the wax pattern 2;
step five, post-treatment
When the metal liquid drop on the surface of the wax mould 2 reaches a certain thickness, stopping the wax mould heating device 1, and after the wax mould 2 is completely cooled to room temperature, obtaining a layer of 10-20 microns aluminum alloy film on the surface of the wax mould 2, wherein the film can effectively avoid cracks of the wax mould 2.
If necessary, the wax pattern 2 is turned over, the steps are repeated, and the other surface is coated with an aluminum alloy film, so that the whole outer surface of the wax pattern 2 is protected.
Claims (8)
1. A method for effectively avoiding cracks of a casting wax mould is characterized in that aluminum alloy powder is heated, melted and vaporized in a vacuum environment, then condensed to form metal liquid drops, the metal liquid drops are located above the surface of the wax mould (2), the metal liquid drops are dragged to the surface of the wax mould (2) through an electric field of eddy current formed above the surface of the wax mould (2) by an electromagnetic generator (5), and the metal liquid drops (3) are quickly cooled and form a uniform aluminum alloy film after being contacted with the surface of the wax mould (2) so as to avoid cracks of the wax mould (2).
2. The method for effectively avoiding cracking of a casting wax pattern according to claim 1, wherein the powder particle size of the aluminum alloy powder is-400 to-450 mesh.
3. Method for effectively avoiding cracking of a cast wax pattern according to claim 1, characterized in that the interior of the wax pattern (2) is supported by a rigid material to ensure the flatness of the surface of the wax pattern (2).
4. The method for effectively avoiding cracking of a casting wax pattern according to claim 1, wherein said aluminum alloy powder is vaporized by ultrasonic means after being heated and melted.
5. The method for effectively avoiding cracking of a cast wax pattern according to claim 1, wherein the preheating of the wax pattern (2) is performed at a preheating temperature of 40-60 ℃ before the aluminum alloy film is prepared on the surface of the wax pattern (2).
6. The method of claim 1, wherein the aluminum alloy film has a thickness of 10 to 20 microns.
7. A device for the method for effectively avoiding cracking of a cast wax pattern according to claim 1, characterized in that a wax pattern heating device (1) is arranged at the bottom of the wax pattern (2), a vacuum sealing space i (3) is arranged above the surface of the wax pattern (2), the vacuum sealing space i (3) is used for filling metal liquid drops, an electromagnetic generator (5) is arranged above the vacuum sealing space i (3), the side surface of the vacuum sealing space i (3) is connected with one end of a metal liquid drop guide path (4), the other end of the metal liquid drop guide path (4) is connected with a condenser (8), another vacuum sealing space ii (10) is arranged below the condenser (8), the vacuum sealing space ii (10) is used for filling aluminum alloy powder, an ultrasonic rotary table (6) is arranged at the bottom end of the vacuum sealing space ii (10), a heating device (7) is arranged at the side surface, and a sieving device (9) is arranged between the vacuum sealing space ii (10) and the condenser (8).
8. The apparatus for effectively avoiding cracking of a cast wax pattern according to claim 7, characterized in that when the aluminum alloy powder is vaporized by ultrasonic means after being heated and melted, the rotation speed of the ultrasonic rotary table (6) is 60-120 rad/s, and the heating temperature of the heating apparatus (7) is increased to 2400-2600 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311377616.6A CN117684167A (en) | 2023-10-23 | 2023-10-23 | Method and device for effectively avoiding cracks of casting wax mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311377616.6A CN117684167A (en) | 2023-10-23 | 2023-10-23 | Method and device for effectively avoiding cracks of casting wax mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117684167A true CN117684167A (en) | 2024-03-12 |
Family
ID=90135979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311377616.6A Pending CN117684167A (en) | 2023-10-23 | 2023-10-23 | Method and device for effectively avoiding cracks of casting wax mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117684167A (en) |
-
2023
- 2023-10-23 CN CN202311377616.6A patent/CN117684167A/en active Pending
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