CN104087886A - Inner bore plasma spraying method - Google Patents
Inner bore plasma spraying method Download PDFInfo
- Publication number
- CN104087886A CN104087886A CN201410259963.3A CN201410259963A CN104087886A CN 104087886 A CN104087886 A CN 104087886A CN 201410259963 A CN201410259963 A CN 201410259963A CN 104087886 A CN104087886 A CN 104087886A
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- Prior art keywords
- powder
- endoporus
- powder feeding
- plasma
- spraying
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- 238000007750 plasma spraying Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 55
- 239000007921 spray Substances 0.000 claims abstract description 41
- 238000005507 spraying Methods 0.000 claims abstract description 16
- 239000002245 particle Substances 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000010422 painting Methods 0.000 claims description 4
- 238000000576 coating method Methods 0.000 abstract description 17
- 239000011248 coating agent Substances 0.000 abstract description 16
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 210000001364 upper extremity Anatomy 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Nozzles (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
An inner bore plasma spraying method comprises the following steps: first, adjusting the spraying position between a plasma cylindrical spray gun and a workpiece inner bore; then sending powder by a radial upward powder sending manner from the lower part of the pray gun; finally, according to the different spraying powder adjusting the flow amount of a powder sending gas to enable the powder to be fully heated and melted in the flame and upward shift a right angle. The inner bore plasma spraying method uses the radial upward powder sending manner from the lower part of the pray gun for powder sending, and the flow amount of the powder sending gas can be adjusted according to the different spraying powder, so that the powder can be fully heated and melted in the flame and upward shifts a right angle, the formation of spraying dead angles on the upper edge of the inner bore can be avoided, the coating performance of a coating on the upper edge of the inner bore can be improved, the hollow and empty spray problems of the coating can be avoided, and the inner bore plasma spraying method has the advantages of simple operation and strong practicability, and is suitable for the atmospheric pressure plasma or low pressure (vacuum) plasma spraying.
Description
Technical field
The present invention relates to plasma spraying technology field, specifically relate to a kind of method of plasma spraying endoporus.
Background technology
Because the heat source temperature of plasma spraying can reach the high temperature of degree up to ten thousand, the material ranges that therefore can spray is very extensive, comprise metal, nonmetal, ceramic etc. can be as the material of plasma spraying, the use range of base material is also wide.The coating quality of plasma spraying is good.The plasma spraying overwhelming majority is for field of aerospace, and occupies the larger market share in field of thermal spray, and preparation possesses insulation, wear-resisting and wear away the coatings such as sealing.
But the endoporus that many times needs to spray part in these fields, for the larger part of some length-to-diameter ratios, generally adopt special-purpose endoporus spray gun to spray, but limit because endoporus spray gun is subject to power and size, to some infusibilities or materials with high melting point, powder sending quantity is generally lower, affects efficiency.And in practical application, have a lot of situations just to spray submarginal endoporus, and need to spray endoporus and cylindrical simultaneously, if adopt endoporus spray gun cannot meet need of production.
Spraying endoporus, conventional plasma (cylindrical) spray gun size is larger, cannot realize plasma gun and Workpiece painting face is perpendicular sprays, and 70～80 ° of extreme angles that angular setting can not only be bumped to spray gun and workpiece spray, as shown in Figure 1.Like this, at spraying dead angle of upper limb formation of endoporus, coating easily forms cavity and empty spray herein, and coating quality can not meet the demands, as shown in Figure 2.
Summary of the invention
The object of the invention is to for above-mentioned existing problems and deficiency, a kind of method of plasma spraying endoporus of the coating performance that can effectively improve endoporus upper marginal position is provided.
Technical scheme of the present invention is achieved in that
The method of plasma spraying endoporus of the present invention, is characterized in comprising the steps:
Spraying position between A, adjustment plasma cylindrical spray gun and the endoporus of workpiece, when the endoporus of workpiece is during near the endoporus of one end or the larger stage casing endoporus of diameter, plasma cylindrical spray gun is inserted in endoporus obliquely, and till angle of gun is adjusted to 70～75 ° of extreme angles that do not bump with workpiece;
The automatic powder feeding system of B, adjustment plasma cylindrical spray gun, this automatic powder feeding system be adopt by spray gun bottom radially upwards the mode of powder feeding carry out powder feeding, this automatic powder feeding system can allow powder particle in heating flight course, under the effect of powder feeding gas, make molten particles stream break through plasma flame and flame-shaped is at a certain angle and to top, carry out the skew of certain angle;
C, according to different dusty spraies, adjust the uninterrupted of powder feeding gas, make powder can be in flame fully heat fused can upwards be offset suitable angle again, and the uninterrupted of powder feeding gas preferably can be adjusted to molten particles is flowed to after upper skew perpendicular to Workpiece painting internal surface.
The present invention due to adopted by spray gun bottom radially upwards the mode of powder feeding carry out powder feeding, and according to different dusty spraies, adjust the spraying method of the uninterrupted of powder feeding gas, make powder in flame, abundant heat fused can upwards be offset suitable angle again, thereby can not form at the upper limb of endoporus spraying dead angle, reach the object of the coating performance that improves endoporus upper limb coating, make coating herein can not form cavity and empty problem of spraying, and of the present invention simple to operate, practical, be applicable to atmospheric plasma or low pressure (vacuum) plasma spraying.
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Accompanying drawing explanation
Fig. 1 in prior art adjusts to conventional plasma (cylindrical) angle of gun 70～80 ° of schematic diagram that extreme angles sprays that spray gun and workpiece do not bump.
Fig. 2 is for spraying the coating performance schematic diagram of the endoporus upper marginal position coating obtaining by prior art.
Fig. 3 is that automatic powder feeding system of the present invention adopts by the spray gun bottom schematic diagram of powder feeding upwards radially.
To be the present invention adjust to angle of gun 70～75 ° of schematic diagram that extreme angles sprays that spray gun and workpiece do not bump to Fig. 4.
Fig. 5 is the installation site schematic diagram of powder conveying pipe of the present invention.
The coating performance schematic diagram that Fig. 6 is the endoporus upper marginal position coating that sprays by the present invention.
Embodiment
The method of plasma spraying endoporus of the present invention, comprises the steps:
First, adjust the spraying position between plasma cylindrical spray gun 1 and the endoporus of workpiece 2, when the endoporus of workpiece 2 is during near the endoporus of one end or the larger stage casing endoporus of diameter, plasma cylindrical spray gun 1 is inserted in endoporus obliquely, and till angle of gun is adjusted to 70～75 ° of extreme angles that do not bump with workpiece;
Then, adjust the automatic powder feeding system of plasma cylindrical spray gun 1, this automatic powder feeding system be adopt by the powder conveying pipe 3 of spray gun bottom radially upwards the mode of powder feeding carry out powder feeding, as shown in Figure 3, this automatic powder feeding system can allow powder particle in heating flight course, under the effect of powder feeding gas, make molten particles stream break through plasma flame and flame-shaped is at a certain angle and to top, carry out the skew of certain angle;
Finally, according to different dusty spraies, adjust the uninterrupted of powder feeding gas, make powder can be in flame fully heat fused can upwards be offset suitable angle again, and the uninterrupted of powder feeding gas preferably can be adjusted to molten particles is flowed to after upper skew perpendicular to Workpiece painting internal surface.
For example:
Spraying inner hole of workpiece diameter 200 mm, near endoporus place, one end, need spraying NiCrAlY coating 0.5mm thick, plasma cylindrical spray gun F4 spray gun, and spray parameters is as shown in table 1.Workpiece rotational frequency 200rpm during spraying, walking rifle speed is 20mm/s, adopts nitrogen powder feeding.
Angle of gun is adjusted to 70～75 ° of extreme angles that do not bump with workpiece and spray, as shown in Figure 4.Wherein, automatic powder feeding system adopts by the radially upwards mode powder feeding of powder feeding of spray gun bottom, as shown in Figure 5.This automatic powder feeding system can allow particle in heating flight course, under the effect of powder feeding gas, molten particles flows to the skew that certain angle is carried out on top, thereby molten particles stream is substantially vertical with the spray angle of upper limb, the coating performance of endoporus upper marginal position is good, as shown in Figure 6.
The present invention describes by embodiment, but the present invention is not construed as limiting, with reference to description of the invention, other variations of the disclosed embodiments, as the professional person for this area easily expects, within such variation should belong to the scope of the claims in the present invention restriction.
Claims (1)
1. a method for plasma spraying endoporus, is characterized in that comprising the steps:
Spraying position between A, adjustment plasma cylindrical spray gun and the endoporus of workpiece, when the endoporus of workpiece is during near the endoporus of one end or the larger stage casing endoporus of diameter, plasma cylindrical spray gun is inserted in endoporus obliquely, and till angle of gun is adjusted to 70～75 ° of extreme angles that do not bump with workpiece;
The automatic powder feeding system of B, adjustment plasma cylindrical spray gun, this automatic powder feeding system be adopt by spray gun bottom radially upwards the mode of powder feeding carry out powder feeding, this automatic powder feeding system can allow powder particle in heating flight course, under the effect of powder feeding gas, make molten particles stream break through plasma flame and flame-shaped is at a certain angle and to top, carry out the skew of certain angle;
C, according to different dusty spraies, adjust the uninterrupted of powder feeding gas, make powder can be in flame fully heat fused can upwards be offset suitable angle again, and the uninterrupted of powder feeding gas preferably can be adjusted to molten particles is flowed to after upper skew perpendicular to Workpiece painting internal surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259963.3A CN104087886B (en) | 2014-06-12 | 2014-06-12 | A kind of method of plasma spraying endoporus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410259963.3A CN104087886B (en) | 2014-06-12 | 2014-06-12 | A kind of method of plasma spraying endoporus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104087886A true CN104087886A (en) | 2014-10-08 |
| CN104087886B CN104087886B (en) | 2016-08-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410259963.3A Active CN104087886B (en) | 2014-06-12 | 2014-06-12 | A kind of method of plasma spraying endoporus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104087886B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106507574A (en) * | 2016-09-29 | 2017-03-15 | 成都真火科技有限公司 | A kind of spraying method for aeronautical material |
| CN107142443A (en) * | 2017-05-12 | 2017-09-08 | 中国航发北京航空材料研究院 | It is a kind of to have the method for blocking groove shape part bottom surface Velocity Oxygen Flame Sprayed Coatings |
| CN109536874A (en) * | 2019-01-22 | 2019-03-29 | 中国人民解放军陆军装甲兵学院 | A kind of internal plasma spraying device with drift angle spraying function |
| CN111647838A (en) * | 2020-07-01 | 2020-09-11 | 矿冶科技集团有限公司 | Method for spraying abradable coating on annular member with uneven wall surface |
| CN112089983A (en) * | 2020-08-06 | 2020-12-18 | 苏州国科兴旺医疗设备有限公司 | Plasma therapeutic instrument is with convenient angle regulation's plasma rifle |
| CN117778939A (en) * | 2024-02-28 | 2024-03-29 | 北矿新材科技有限公司 | Preparation method of connector coating, connector and battery or electrolytic cell group |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4970364A (en) * | 1986-12-11 | 1990-11-13 | Castolin S.A. | Method of coating internal surfaces of an object by plasma spraying |
| CN2411260Y (en) * | 1999-08-27 | 2000-12-20 | 高阳 | Low-power high-efficiency plasma spraying device |
-
2014
- 2014-06-12 CN CN201410259963.3A patent/CN104087886B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4970364A (en) * | 1986-12-11 | 1990-11-13 | Castolin S.A. | Method of coating internal surfaces of an object by plasma spraying |
| CN2411260Y (en) * | 1999-08-27 | 2000-12-20 | 高阳 | Low-power high-efficiency plasma spraying device |
Non-Patent Citations (1)
| Title |
|---|
| 王海军等: "内孔等离子喷涂装置与工艺研究", 《热喷涂技术》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106507574A (en) * | 2016-09-29 | 2017-03-15 | 成都真火科技有限公司 | A kind of spraying method for aeronautical material |
| CN106507574B (en) * | 2016-09-29 | 2019-01-25 | 成都真火科技有限公司 | A kind of spraying method for aeronautical material |
| CN107142443A (en) * | 2017-05-12 | 2017-09-08 | 中国航发北京航空材料研究院 | It is a kind of to have the method for blocking groove shape part bottom surface Velocity Oxygen Flame Sprayed Coatings |
| CN109536874A (en) * | 2019-01-22 | 2019-03-29 | 中国人民解放军陆军装甲兵学院 | A kind of internal plasma spraying device with drift angle spraying function |
| CN109536874B (en) * | 2019-01-22 | 2024-01-09 | 中国人民解放军陆军装甲兵学院 | Inner hole plasma spraying device with deflection angle spraying function |
| CN111647838A (en) * | 2020-07-01 | 2020-09-11 | 矿冶科技集团有限公司 | Method for spraying abradable coating on annular member with uneven wall surface |
| CN111647838B (en) * | 2020-07-01 | 2022-07-01 | 矿冶科技集团有限公司 | Method for spraying abradable coating on annular member with uneven wall surface |
| CN112089983A (en) * | 2020-08-06 | 2020-12-18 | 苏州国科兴旺医疗设备有限公司 | Plasma therapeutic instrument is with convenient angle regulation's plasma rifle |
| CN112089983B (en) * | 2020-08-06 | 2023-09-22 | 苏州国科兴旺医疗设备有限公司 | Plasma gun with convenient angle adjustment for plasma therapeutic instrument |
| CN117778939A (en) * | 2024-02-28 | 2024-03-29 | 北矿新材科技有限公司 | Preparation method of connector coating, connector and battery or electrolytic cell group |
| CN117778939B (en) * | 2024-02-28 | 2024-04-30 | 北矿新材科技有限公司 | Preparation method of connector coating, connector and battery or electrolytic cell group |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104087886B (en) | 2016-08-24 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180103 Address after: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee after: GUANGDONG INSTITUTE OF NEW MATERIALS Address before: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee before: GUANGDONG GENERAL Research Institute FOR INDUSTRIAL TECHNOLOGY (GUANGZHOU RESEARCH INSTITUTE OF NON FERROUS METALS) |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200903 Address after: No.106, first floor, building 72, Lihe science and technology industry center accelerator project, No.33, information Avenue South, Shishan town, Nanhai District, Foshan City, Guangdong Province Patentee after: Guangdong Yueke New Material Technology Co.,Ltd. Address before: 510651 Changxin Road, Guangzhou, Guangdong, No. 363, No. Patentee before: GUANGDONG INSTITUTE OF NEW MATERIALS |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A method of plasma spraying inner holes Effective date of registration: 20230413 Granted publication date: 20160824 Pledgee: Bank of China Limited by Share Ltd. Foshan branch Pledgor: Guangdong Yueke New Material Technology Co.,Ltd. Registration number: Y2023980037949 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20160824 Pledgee: Bank of China Limited by Share Ltd. Foshan branch Pledgor: Guangdong Yueke New Material Technology Co.,Ltd. Registration number: Y2023980037949 |