CN114683101A - Forming method of fluid rotary joint rotating shaft - Google Patents
Forming method of fluid rotary joint rotating shaft Download PDFInfo
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- CN114683101A CN114683101A CN202210477969.2A CN202210477969A CN114683101A CN 114683101 A CN114683101 A CN 114683101A CN 202210477969 A CN202210477969 A CN 202210477969A CN 114683101 A CN114683101 A CN 114683101A
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- rotating shaft
- rotary joint
- wear
- fluid rotary
- grinding
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- 239000012530 fluid Substances 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000000227 grinding Methods 0.000 claims abstract description 24
- 238000005498 polishing Methods 0.000 claims abstract description 16
- 238000005507 spraying Methods 0.000 claims abstract description 14
- 238000007639 printing Methods 0.000 claims abstract description 11
- 238000010285 flame spraying Methods 0.000 claims abstract description 8
- 239000000843 powder Substances 0.000 claims abstract description 7
- 238000012545 processing Methods 0.000 claims abstract description 7
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 6
- 239000010432 diamond Substances 0.000 claims abstract description 6
- 238000007514 turning Methods 0.000 claims abstract description 5
- 229910009043 WC-Co Inorganic materials 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 238000000151 deposition Methods 0.000 claims abstract description 4
- 238000001513 hot isostatic pressing Methods 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 238000005488 sandblasting Methods 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 4
- 230000003746 surface roughness Effects 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010146 3D printing Methods 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000010923 batch production Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/04—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces externally
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
- B24B29/02—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces
- B24B29/04—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents designed for particular workpieces for rotationally symmetrical workpieces, e.g. ball-, cylinder- or cone-shaped workpieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C3/00—Abrasive blasting machines or devices; Plants
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/067—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds comprising a particular metallic binder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/02—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides
- C22C29/06—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds
- C22C29/08—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on tungsten carbide
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
Abstract
The invention discloses a method for forming a rotating shaft of a fluid rotary joint, which comprises the following steps: step one, determining a printing model; step two, printing a blank entity: printing a blank of the fluid rotary joint rotating shaft by adopting spherical metal powder of 20-60 micrometers, and then performing hot isostatic pressing treatment; step three, turning the wear-resistant surface: processing the size of the wear-resistant surface of the fluid rotary joint rotating shaft to be less than the final size of 0.3-0.4 mm; step four, carrying out supersonic flame spraying on the wear-resistant surface: sandblasting and coarsening a surface to be sprayed to Sa2.5 level, and depositing a WC-Co coating on the wear-resistant surface of the rotating shaft by using a supersonic flame spraying system; step five, grinding and processing the wear-resistant surface: grinding the spraying surface to be larger than the final size by 0.02mm by using a cylindrical grinding machine; step six, polishing the wear-resistant surface: and grinding and polishing the opposite surface on a lathe by adopting diamond grinding paste.
Description
Technical Field
The invention mainly belongs to the technical field of additive manufacturing and machining processes, and particularly relates to a method for forming a rotating shaft of a fluid rotary joint.
Background
The fluid rotary joint is a key device for connecting a dynamic cooling pipeline and a static cooling pipeline of a cooling system of large-scale electronic equipment, and the rotary joint requires long service life and high reliability under the working conditions of wide temperature range and high impact. In order to prolong the service life of the rotary joint and avoid leakage of a cooling medium, a rotary joint rotating shaft needs to have the performances of high wear resistance, corrosion resistance, wide temperature range, high reliability under high impact and small deformation.
The rotary joint rotating shaft has a complex structure, is generally manufactured by stainless steel or titanium alloy through a traditional machining mode, has great machining difficulty, and has to find a new manufacturing method considering that the stainless steel or titanium alloy material has low hardness, poor wear resistance and high possibility of abrasion and is difficult to meet the requirements of high reliability, wide temperature range and high impact of electronic equipment.
Disclosure of Invention
In order to solve the problems, the invention provides a method for forming a rotating shaft of a fluid rotary joint, which realizes the light weight of the rotating shaft, high reliability and small deformation under the working conditions of wide temperature range and high impact and realizes the high reliability and no leakage of the rotary joint under the working conditions of wide temperature range and high impact. The method is used for forming the rotating shaft of the fluid rotary joint, and tests show that the deformation of the rotating shaft is less than 2 mu m under the working conditions of wide temperature range and high impact, the fluid rotary joint has no leakage, and the method is suitable for producing and manufacturing the rotating shaft of the fluid rotary joint under the working conditions of extreme environments and has wide application prospect and social benefit.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a method for forming a fluid rotary joint rotating shaft comprises the following steps:
step one, determining a printing model;
step two, printing a blank entity: printing a blank of the fluid rotary joint rotating shaft by adopting spherical metal powder of 20-60 microns, and then performing hot isostatic pressing treatment;
step three, turning the wear-resistant surface: processing the size of the wear-resistant surface of the fluid rotary joint rotating shaft to be 0.3-0.4mm smaller than the final size;
step four, carrying out supersonic flame spraying on the wear-resistant surface: sandblasting and coarsening the surface to be sprayed to Sa2.5 level, and depositing a WC-Co coating on the wear-resistant surface of the rotating shaft by using a supersonic flame spraying system;
step five, grinding the wear-resistant surface: grinding the spraying surface to be larger than the final size by 0.02mm by using a cylindrical grinding machine;
step six, polishing the wear-resistant surface: and grinding and polishing the opposite surface on a lathe by adopting diamond grinding paste.
Further, in the fourth step, the pressure of the spraying combustion chamber is 8-9bar, the powder conveying amount of the spraying is 90-110g/min, the spraying distance is 300-350mm, the spraying thickness is 0.2-0.4mm, the bonding force is not less than 70MPa, and the porosity is not more than 1%.
Further, the diamond grinding paste with the granularity superior to W2.5 is adopted for grinding and polishing, the rotating speed of parts is 100-150 r/min, the polishing pressure is 90N-100N, and the surface roughness after polishing is not more than Ra0.2.
Furthermore, the fluid rotary joint comprises a rotating shaft, a shell, a sealing ring and a bearing, the fluid rotary joint is divided into a liquid inlet/return sealing cavity body with an upper part and a lower part independent by 3 groups of sealing rings, and a flow passage in the rotating shaft realizes the connection of a dynamic cooling pipeline and a static cooling pipeline through the shell. .
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a method for forming a fluid rotary joint rotating shaft, which can improve the surface hardness of titanium alloy and stainless steel to HRC70 and the surface roughness to Ra0.2, enhance the wear resistance of the rotating shaft and greatly prolong the service life of the rotary joint; the problem of deformation of the rotating shaft of the rotary joint under the working conditions of wide temperature range and high impact is solved, and the reliability of the equipment is improved; the corrosion resistance is good, and the salt spray test is carried out for 96 hours, so that the corrosion is avoided; the process is stable and controllable, and is beneficial to batch production.
Drawings
FIG. 1 is a cross-sectional view of a fluid rotary joint;
FIG. 2 is a sectional view of the spindle;
wherein: 1. a rotating shaft; 2. a housing; 3. a seal member; 4. and a bearing.
Detailed Description
The preferred mechanisms and methods of motion realization of the present invention are further described below in conjunction with the figures and the detailed description.
As shown in fig. 1 and 2, the fluid rotary joint comprises a rotary shaft 1, a housing 2, a sealing ring 3 and a bearing 4, the lower end of the rotary shaft 1 is fixed, the upper end of the housing 2 is driven by a driving device to rotate, the fluid rotary joint is divided into two independent liquid inlet and return cavities by three groups of sealing rings, through the housing 2, the connection of a dynamic and static cooling pipeline is realized by a flow channel inside the rotary shaft, a cooling medium flows out from a liquid outlet on the side surface of the housing 2 after entering from a liquid inlet on the rotary shaft 1 through a fixed cooling source, and flows into a liquid return hole on the side surface of the housing 2 after cooling the electronic equipment, and then enters the liquid return hole on the rotary shaft 1 and flows into the fixed cooling source.
The method for forming the rotating shaft of the rotary joint comprises the following steps:
first, confirm the printing model of the rotary joint spindle of the additive manufacturing
And designing a rotating shaft model by using three-dimensional modeling software in combination with actual performance indexes of the rotary joint, exporting the rotating shaft model as a 3D printing format file, performing layout and layer cutting processing on the model to determine proper process support, and determining proper 3D printing basic parameters.
Second, print the blank entity of the spindle
3D printing of the rotating shaft blank is completed by using a selective laser melting technology, the rotating shaft blank is printed by using spherical metal powder of 20-60 microns, and hot isostatic pressing treatment is performed after printing is completed.
Thirdly, turning the wear-resistant surface of the rotating shaft
And (4) turning the rotating shaft by using a lathe, and processing the size of the wear-resistant surface needing surface hardening to be 0.3-0.4mm smaller than the final size. The purpose of the step is to ensure that the thickness of the wear-resistant layer is not less than 0.15mm after the processing is finished.
Supersonic flame spraying of wear-resisting surface of rotating shaft
And sandblasting and coarsening the surface to be sprayed to Sa2.5 level, depositing a WC-Co coating on the wear-resistant surface of the rotating shaft by using a JP-8000 type supersonic flame spraying system, wherein the pressure of a spraying combustion chamber is 8-9bar, the spraying powder delivery amount is 90-110g/min, the spraying distance is 300-350mm, the spraying thickness is 0.2-0.4mm, the bonding force is not less than 70MPa, and the porosity is not more than 1%.
Grinding machining of wear-resistant surface of rotating shaft
And grinding the spraying surface to be larger than the final size by 0.02mm by using a cylindrical grinding machine.
Sixthly, polishing the wear-resisting surface of the rotating shaft
And grinding and polishing the rotary joint rotating shaft on a lathe by using diamond grinding paste with the granularity superior to W2.5, wherein the rotating speed of a part is 100-150 r/min, the polishing pressure is 90N-100N, and the surface roughness after polishing is not more than Ra0.2.
Through subsequent test experiments, the rotating shaft of the rotary joint is tested at high and low temperatures ranging from-50 ℃ to +70 ℃, the deformation of the rotating shaft of the fluid rotary joint is less than 2 mu m under the working condition of vibration and impact, and the fluid rotary joint runs stably without faults.
Finally, it should be noted that: although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (4)
1. A method for forming a rotating shaft of a fluid rotary joint is characterized by comprising the following steps:
step one, determining a printing model;
step two, printing a blank entity: printing a blank of the fluid rotary joint rotating shaft by adopting spherical metal powder of 20-60 microns, and then performing hot isostatic pressing treatment;
step three, turning the wear-resistant surface: processing the size of the wear-resistant surface of the fluid rotary joint rotating shaft to be 0.3-0.4mm smaller than the final size;
step four, carrying out supersonic flame spraying on the wear-resistant surface: sandblasting and coarsening the surface to be sprayed to Sa2.5 level, and depositing a WC-Co coating on the wear-resistant surface of the rotating shaft by using a supersonic flame spraying system;
step five, grinding the wear-resistant surface: grinding the spraying surface to be larger than the final size by 0.02mm by using a cylindrical grinding machine;
step six, polishing the wear-resistant surface: and grinding and polishing the opposite surface on a lathe by adopting diamond grinding paste.
2. The method for forming a rotating shaft of a fluid rotary joint as claimed in claim 1, wherein the pressure in the combustion chamber is 8-9bar, the powder feeding amount is 90-110g/min, the spraying distance is 300-350mm, the spraying thickness is 0.2-0.4mm, the bonding force is not less than 70Mpa, and the porosity is not more than 1%.
3. The method for forming the rotating shaft of the fluid rotary joint according to claim 1, wherein the diamond grinding paste with the granularity superior to W2.5 is used for grinding and polishing, the rotating speed of the part is 100-150 r/min, the polishing pressure is 90N-100N, and the surface roughness after polishing is not more than Ra0.2.
4. The method for forming the rotating shaft of the fluid rotary joint according to claim 1, wherein the fluid rotary joint comprises a rotating shaft (1), a shell (2), sealing rings (3) and a bearing (4), the fluid rotary joint is divided into a liquid inlet sealing cavity and a liquid return sealing cavity which are independent from each other up and down by 3 groups of sealing rings, and a flow passage in the rotating shaft realizes the connection of a dynamic cooling pipeline and a static cooling pipeline through the shell (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210477969.2A CN114683101A (en) | 2022-04-29 | 2022-04-29 | Forming method of fluid rotary joint rotating shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210477969.2A CN114683101A (en) | 2022-04-29 | 2022-04-29 | Forming method of fluid rotary joint rotating shaft |
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| Publication Number | Publication Date |
|---|---|
| CN114683101A true CN114683101A (en) | 2022-07-01 |
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ID=82144194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210477969.2A Pending CN114683101A (en) | 2022-04-29 | 2022-04-29 | Forming method of fluid rotary joint rotating shaft |
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| CN113373397A (en) * | 2021-05-31 | 2021-09-10 | 芜湖舍达激光科技有限公司 | Preparation method of high-temperature wear-resistant shaft sleeve |
| CN114351077A (en) * | 2021-12-03 | 2022-04-15 | 昌河飞机工业（集团）有限责任公司 | Spraying and grinding process method for tungsten carbide on surface of polished rod of bolt part |
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2022
- 2022-04-29 CN CN202210477969.2A patent/CN114683101A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106239317A (en) * | 2016-07-29 | 2016-12-21 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of processing method improving piston face roughness |
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