CN113770643A - Large-area repairing method for blade with cooling hole - Google Patents
Large-area repairing method for blade with cooling hole Download PDFInfo
- Publication number
- CN113770643A CN113770643A CN202111227187.5A CN202111227187A CN113770643A CN 113770643 A CN113770643 A CN 113770643A CN 202111227187 A CN202111227187 A CN 202111227187A CN 113770643 A CN113770643 A CN 113770643A
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- China
- Prior art keywords
- blade
- welding
- area
- hole
- repairing
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- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000001816 cooling Methods 0.000 title claims abstract description 17
- 238000003466 welding Methods 0.000 claims description 50
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 18
- 238000005219 brazing Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000004080 punching Methods 0.000 claims description 11
- 229910052759 nickel Inorganic materials 0.000 claims description 9
- 238000005498 polishing Methods 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 238000010892 electric spark Methods 0.000 claims description 6
- 230000004927 fusion Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000000956 alloy Substances 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010408 sweeping Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
Classifications
-
- 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
- B23P6/00—Restoring or reconditioning objects
- B23P6/002—Repairing turbine components, e.g. moving or stationary blades, rotors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
Abstract
The invention discloses a large-area repairing method for a blade with a cooling hole. The repairing method can repair the large-area damaged blade, ensures that the quality of the blade is consistent with the original quality, improves the reutilization of the blade, and reduces the maintenance cost of the impeller.
Description
Technical Field
The invention relates to a blade repairing method, in particular to a large-area blade repairing method with cooling holes.
Background
The gas engine can lead to the movable vane of impeller to appear wearing and tearing in the course of the work, discover that the wall thickness is too thin when examining movable vane edgemost cooling hole, only 0.1MM, can not reach the wall thickness 1.0MM of technological requirement, can directly adopt the welded mode to repair to the small size, but to the movable vane of large tracts of land wearing and tearing, all directly adopt the substitution mode to maintain the impeller, the mode of this kind of substitution leads to cost of maintenance high, consequently, need appear a blade large tracts of land restoration method urgently, reduce the cost of maintenance to the impeller.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to solve the defects in the prior art, and provides a method for repairing a blade with a cooling hole in a large area. However, the height of the overlaying welding is about 80MM, the punching depth is about more than 100MM, and the overlaying welding needs to be penetrated through the original holes.
The technical scheme is as follows: the invention relates to a large-area repair method for a blade with a cooling hole, which comprises the following steps:
step one, using a thickness measuring instrument and marking a thin wall area by using a marking pen;
step two, manufacturing a wall thin area polishing template by using a 1mm stainless steel plate, wherein the template generally has to be a large arc angle to prevent welding stress from concentrating, and polishing and removing the wall thin area according to the template;
welding under the protection of argon to protect the deposited metal material of the welding seam and welding forming; because the blade has radian during welding, the red copper plate is attached to the back of the welding seam, so that the width of the welding seam is ensured to be consistent;
fourthly, the upper punching electric spark punching machine tool adjusts the verticality of the punched hole according to the radian of the blade and the requirement through tool positioning, determines the position of the blade on the machine tool through positioning, prevents the punched hole from completely penetrating through the original hole after welding, punches, and takes down the blade for welding after the punched hole penetrates through the original hole;
step five, repeating the step three to the step four until all the missing areas are welded, and performing the next step after the cooling holes are punched;
step six, manually polishing the welding area of the blade to recover the profile of the blade profile;
and step seven, carrying out brazing and postweld heat treatment on the blade, wherein the brazing heat treatment is used for recovering the contour of the welding fusion area and preventing the fusion area from generating welding cracks.
Further, in the first step, setting parameters in the thickness measuring instrument: basic gain: 70dB, determining the sound velocity according to the crystalline direction and the material of the blade: 5400m/s-6500m/s, compensation: 4-6 dB.
Further, welding wires are adopted in the third step: 1.2mm nickel base alloy welding wire; current: 30-40A, voltage: 10-11.5V, welding speed: 100-: 8-10L/min, welding height for each time: 20 mm.
Further, the fourth step is that the upper punching electric spark punching machine tool has the setting parameters: electrode diameter: Φ 0.8mm, high pressure water pressure: 70-77KG/cm2, current: 6.5-8.5A, voltage: 20-25V.
Further, in the seventh step, before brazing heat treatment, nickel-based sand is used for purging the component to increase the roughness of a brazing surface, nickel-based brazing material is used for coating the surface of the component, and the heat treatment temperature is as follows: 1150 ℃ and 1300 ℃ for 30 min.
Has the advantages that: according to the large-area blade repairing method with the cooling holes, the large-area damaged blades can be repaired by the repairing method, the quality of the blades is ensured to be consistent with the original quality, the reutilization of the blades is improved, and the maintenance cost of the impeller is reduced.
Detailed Description
A large-area repair method for a blade with a cooling hole comprises the following steps:
step one, using a thickness measuring instrument and marking a thin wall area by using a marking pen;
step two, manufacturing a wall thin area polishing template by using a 1mm stainless steel plate, wherein the template generally has to be a large arc angle to prevent welding stress from concentrating, and polishing and removing the wall thin area according to the template;
welding under the protection of argon to protect the deposited metal material of the welding seam and welding forming; because the blade has radian during welding, the red copper plate is attached to the back of the welding seam, so that the width of the welding seam is ensured to be consistent;
fourthly, the upper punching electric spark punching machine tool adjusts the verticality of the punched hole according to the radian of the blade and the requirement through tool positioning, determines the position of the blade on the machine tool through positioning, prevents the punched hole from completely penetrating through the original hole after welding, punches, and takes down the blade for welding after the punched hole penetrates through the original hole;
step five, repeating the step three to the step four until all the missing areas are welded, and performing the next step after the cooling holes are punched;
step six, manually polishing the welding area of the blade to recover the profile of the blade profile;
and step seven, carrying out brazing and postweld heat treatment on the blade, wherein the brazing heat treatment is used for recovering the contour of the welding fusion area and preventing the fusion area from generating welding cracks.
In this example, further, in the first step, the parameter setting in the thickness gauge is as follows: basic gain: 70dB, determining the sound velocity according to the crystalline direction and the material of the blade: 5400m/s-6500m/s, compensation: 4-6dB, wherein the thickness gauge: DLYMPUS 38DL Plus, probe: V260-RM; the wafer model: 15/0.125 ";
in this example, further, the welding wire is adopted in the third step: 1.2mm nickel base alloy welding wire; current: 30-40A, voltage: 10-11.5V, welding speed: 100-: 8-10L/min, welding height for each time: 20 mm.
In this example, further, the setting parameters of the upper-hole electric spark punching machine in the fourth step are as follows: electrode diameter: Φ 0.8mm, high pressure water pressure: 70-77KG/cm2, current: 6.5-8.5A, voltage: 20-25V.
In this example, further, in the seventh step, the nickel-based sand is used for purging the component before the brazing heat treatment, the roughness of the brazing surface is increased, the nickel-based brazing material is used for coating the surface of the component, and the heat treatment temperature is as follows: 1150 ℃ and 1300 ℃ for 30 min.
The above description is the preferred embodiment of the present invention, and the scope of the claims of the present invention should not be limited thereto. It should be noted that modifications and equivalents may be made to the technical solution of the present invention by those skilled in the art without departing from the scope of the present invention.
Claims (5)
1. A method for repairing a large area of a blade with a cooling hole is characterized by comprising the following steps: the method comprises the following steps:
step one, using a thickness measuring instrument and marking a thin wall area by using a marking pen;
step two, manufacturing a wall thin area polishing template by using a 1mm stainless steel plate, wherein the template generally has to be a large arc angle to prevent welding stress from concentrating, and polishing and removing the wall thin area according to the template;
welding under the protection of argon to protect the deposited metal material of the welding seam and welding forming; because the blade has radian during welding, the red copper plate is attached to the back of the welding seam, so that the width of the welding seam is ensured to be consistent;
fourthly, the upper punching electric spark punching machine tool adjusts the verticality of the punched hole according to the radian of the blade and the requirement through tool positioning, determines the position of the blade on the machine tool through positioning, prevents the punched hole from completely penetrating through the original hole after welding, punches, and takes down the blade for welding after the punched hole penetrates through the original hole;
step five, repeating the step three to the step four until all the missing areas are welded, and performing the next step after the cooling holes are punched;
step six, manually polishing the welding area of the blade to recover the profile of the blade profile;
and step seven, carrying out brazing and postweld heat treatment on the blade, wherein the brazing heat treatment is used for recovering the contour of the welding fusion area and preventing the fusion area from generating welding cracks.
2. The method for repairing the large area of the blade with the cooling hole as claimed in claim 1, wherein: setting parameters in the thickness measuring instrument in the first step: basic gain: 70dB, determining the sound velocity according to the crystalline direction and the material of the blade: 5400m/s-6500m/s, compensation: 4-6 dB.
3. The method for repairing the large area of the blade with the cooling hole according to claim 1, wherein: welding wires are adopted in the third step: 1.2mm nickel base alloy welding wire; current: 30-40A, voltage: 10-11.5V, welding speed: 100-: 8-10L/min, welding height for each time: 20 mm.
4. The method for repairing the large area of the blade with the cooling hole as claimed in claim 1, wherein: and in the fourth step, the upper perforating electric spark punching machine tool has the set parameters: electrode diameter: Φ 0.8mm, high pressure water pressure: 70-77KG/cm2Current: 6.5-8.5A, voltage: 20-25V.
5. The method for repairing the large area of the blade with the cooling hole as claimed in claim 1, wherein: in the seventh step, before brazing heat treatment, nickel-based sand is used for sweeping the part to increase the roughness of a brazing surface, nickel-based brazing material is coated on the surface of the part, and the heat treatment temperature is as follows: 1150 ℃ and 1300 ℃ for 30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111227187.5A CN113770643A (en) | 2021-10-21 | 2021-10-21 | Large-area repairing method for blade with cooling hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111227187.5A CN113770643A (en) | 2021-10-21 | 2021-10-21 | Large-area repairing method for blade with cooling hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113770643A true CN113770643A (en) | 2021-12-10 |
Family
ID=78873305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111227187.5A Pending CN113770643A (en) | 2021-10-21 | 2021-10-21 | Large-area repairing method for blade with cooling hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113770643A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080210741A1 (en) * | 2007-03-01 | 2008-09-04 | General Electric Company | Weld repair as a combined heat treatment brazing process for metallic components |
| CN109108568A (en) * | 2018-09-12 | 2019-01-01 | 新疆科鼎环保科技有限公司 | High pressure valve leakage position restorative procedure |
| CN109986279A (en) * | 2017-12-31 | 2019-07-09 | 乌鲁木齐森纳途信息科技有限公司 | A kind of pyrolysis furnace high pressure steam boiler water-supply valve welding repair method |
| CN111822801A (en) * | 2020-07-31 | 2020-10-27 | 成都和鸿科技有限公司 | Method for milling turbine blade expansion hole by electric spark |
| CN111922621A (en) * | 2020-06-29 | 2020-11-13 | 东方电气集团东方汽轮机有限公司 | Automatic repairing and remanufacturing method of turbine blade |
| CN112276473A (en) * | 2020-10-21 | 2021-01-29 | 北京建工土木工程有限公司 | Spiral machine blade repairing method of shield machine |
| CN112453824A (en) * | 2020-11-18 | 2021-03-09 | 杨媛媛 | Titanium alloy compressor blade welding repair method |
| CN112983557A (en) * | 2021-03-01 | 2021-06-18 | 杭州汽轮动力集团有限公司 | High-temperature test piece for gas turbine blade and manufacturing method thereof |
| CN113088962A (en) * | 2021-04-02 | 2021-07-09 | 中国人民解放军空军工程大学 | Laser cladding multi-azimuth repairing method for titanium alloy thin-wall blade damaged part |
-
2021
- 2021-10-21 CN CN202111227187.5A patent/CN113770643A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080210741A1 (en) * | 2007-03-01 | 2008-09-04 | General Electric Company | Weld repair as a combined heat treatment brazing process for metallic components |
| CN109986279A (en) * | 2017-12-31 | 2019-07-09 | 乌鲁木齐森纳途信息科技有限公司 | A kind of pyrolysis furnace high pressure steam boiler water-supply valve welding repair method |
| CN109108568A (en) * | 2018-09-12 | 2019-01-01 | 新疆科鼎环保科技有限公司 | High pressure valve leakage position restorative procedure |
| CN111922621A (en) * | 2020-06-29 | 2020-11-13 | 东方电气集团东方汽轮机有限公司 | Automatic repairing and remanufacturing method of turbine blade |
| CN111822801A (en) * | 2020-07-31 | 2020-10-27 | 成都和鸿科技有限公司 | Method for milling turbine blade expansion hole by electric spark |
| CN112276473A (en) * | 2020-10-21 | 2021-01-29 | 北京建工土木工程有限公司 | Spiral machine blade repairing method of shield machine |
| CN112453824A (en) * | 2020-11-18 | 2021-03-09 | 杨媛媛 | Titanium alloy compressor blade welding repair method |
| CN112983557A (en) * | 2021-03-01 | 2021-06-18 | 杭州汽轮动力集团有限公司 | High-temperature test piece for gas turbine blade and manufacturing method thereof |
| CN113088962A (en) * | 2021-04-02 | 2021-07-09 | 中国人民解放军空军工程大学 | Laser cladding multi-azimuth repairing method for titanium alloy thin-wall blade damaged part |
Non-Patent Citations (1)
| Title |
|---|
| 朱艳，赵霞: "《焊接方法与设备》", 哈尔滨：哈尔滨工业大学出版社, pages: 268 - 269 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20211210 |