CN115138853B - Repairing method for cylinder barrel of actuator cylinder - Google Patents
Repairing method for cylinder barrel of actuator cylinder Download PDFInfo
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- CN115138853B CN115138853B CN202110337992.7A CN202110337992A CN115138853B CN 115138853 B CN115138853 B CN 115138853B CN 202110337992 A CN202110337992 A CN 202110337992A CN 115138853 B CN115138853 B CN 115138853B
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- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000000843 powder Substances 0.000 claims abstract description 69
- 230000008439 repair process Effects 0.000 claims abstract description 34
- 239000002184 metal Substances 0.000 claims abstract description 28
- 230000007547 defect Effects 0.000 claims abstract description 21
- 238000005253 cladding Methods 0.000 claims abstract description 11
- 239000011261 inert gas Substances 0.000 claims abstract description 10
- 238000002844 melting Methods 0.000 claims abstract description 10
- 230000008018 melting Effects 0.000 claims abstract description 10
- 238000005516 engineering process Methods 0.000 claims abstract description 9
- 238000004372 laser cladding Methods 0.000 claims abstract description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 claims description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 2
- 238000009689 gas atomisation Methods 0.000 claims description 2
- 238000003801 milling Methods 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 claims 1
- 230000001105 regulatory effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 239000000654 additive Substances 0.000 abstract description 5
- 230000000996 additive effect Effects 0.000 abstract description 5
- 230000002950 deficient Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 12
- 238000003466 welding Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000004907 flux Effects 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010128 melt processing Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/20—Post-treatment, e.g. curing, coating or polishing
-
- 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
- C23C24/00—Coating starting from inorganic powder
- C23C24/08—Coating starting from inorganic powder by application of heat or pressure and heat
- C23C24/10—Coating starting from inorganic powder by application of heat or pressure and heat with intermediate formation of a liquid phase in the layer
- C23C24/103—Coating with metallic material, i.e. metals or metal alloys, optionally comprising hard particles, e.g. oxides, carbides or nitrides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/247—Removing material: carving, cleaning, grinding, hobbing, honing, lapping, polishing, milling, shaving, skiving, turning the surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/06—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools
- B22F7/062—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts
- B22F2007/068—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite workpieces or articles from parts, e.g. to form tipped tools involving the connection or repairing of preformed parts repairing articles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a method for repairing an actuator cylinder barrel, and belongs to the technical field of hydraulic cylinder barrel additive repairing processing technology. The method adopts a metal powder melting technology to repair the wall of the oil cylinder body, and specifically comprises the following steps: filling repairing metal powder into the defective part of the cylinder barrel, filling the metal powder into a repairing box, and then introducing inert gas and carrying out preheating treatment; the laser cladding head is extended into the repairing box to be aligned to the part to be repaired, the laser power is 2-4 KW, the feeding speed of the cladding head is 10-20 mm/min, and the powder feeding speed is 1-3 g/min. The method not only can be used for repairing the oil cylinder body of the actuator, but also can be used for repairing cylinder barrels of other common hydraulic cylinders, and is particularly suitable for repairing defects of large-length-diameter-ratio pipe parts.
Description
Technical Field
The invention relates to the technical field of hydraulic cylinder barrel material-adding repairing processing technology, in particular to a repairing method of an actuator cylinder barrel.
Background
The actuator is a driving device for deformation of the active reflecting surface of the FAST telescope, totally 2225 units, and is a field local large-scale equipment group rare in the world. The actuator works in the field and is subjected to the effects of repeated change of air temperature, rain erosion and the like, and the cylinder barrel of the actuator cylinder is easy to have the defects of rust, crack and the like. Because the length-diameter ratio of the cylinder barrel is larger, defects far away from two ends are inconvenient to maintain, and scrapping treatment is usually required after the cylinder barrel is returned to a factory, so that waste is caused to a certain extent. Therefore, a repairing method is provided as a key technology for repairing and maintaining the FAST telescope actuator group, and is used for repairing and expanding the actuator cylinder in a FAST maintenance workshop. At present, no disclosure material is presented for the repair method.
Disclosure of Invention
The invention aims to provide a method for repairing an actuator cylinder barrel, which uses high-energy laser to melt metal powder and metal base metal so as to fuse defects.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the repairing method of the cylinder barrel of the actuator cylinder adopts a metal powder melting technology to repair the wall of the cylinder barrel of the cylinder, and specifically comprises the following steps:
(1) Filling the defect of the cylinder barrel to be repaired with metal powder for repairing, and horizontally placing and fixing the cylinder barrel on a positioning tool in a repairing box so that the defect to be repaired is horizontally upwards;
(2) Filling metal powder into the repair box until the uppermost edge of the cylinder body to be repaired just dips into the metal powder;
(3) After the repair box is sealed by adopting modes of covering a temperature-resistant plastic film and the like, inert gas is introduced into the repair box to reduce the oxygen content in the box, and meanwhile, the metal powder and the cylinder body of the oil cylinder are preheated;
(4) And (3) repairing: extending the laser cladding head into the repair box to align with the part to be repaired; starting laser, controlling the laser power within the range of 2 KW-4 KW, and controlling the feeding speed of the cladding head within the range of 10 mm-20 mm/min for the thin-wall cylinder barrel. Too low a laser power and too fast a feed rate can lead to powder unmelting, unmelting at the defect, while too high a laser power and too slow a feed rate can lead to too deep a weld pool, too large a working heat affected zone, too large a deformation, etc. When the process method of the invention uses the laser cladding head to carry out fusion repair on the surface of the cylinder body, the required powder supply amount is far lower than that of the traditional laser melting additive manufacturing method, and the actual powder supply rate is controlled between 1g and 3g/min. The powder feeding amount is not too large, and the excessive powder feeding amount cannot effectively improve the repairing effect, and meanwhile, powder in a repairing area is prevented from being blown away by the powder feeding airflow.
(5) And (3) post-repair treatment: and stopping heating the metal powder, and slowly cooling the cylinder body under the protection atmosphere of inert gas.
Before the step (1), preparing before repairing, namely cleaning the defect part of the cylinder barrel of the oil cylinder by adopting a milling mode or an air gouging mode and the like, wherein the defect part comprises surface paint at the position to be repaired of the cylinder body.
In the step (1), the metal powder for repairing is low-carbon steel gas atomization spherical powder which is made of the same material as the cylinder barrel of the actuator cylinder. The powder is stored in a sealed container before use to avoid oxidation.
In the step (3), the oxygen content in the repair box is controlled to be reduced to below 5000ppm, and the preheating temperature is controlled to be 200-300 ℃. The powder and cylinder are preheated during repair to reduce thermal deformation and cracking.
After the step (3), the metal powder in the cylinder barrel of the oil cylinder is not just prevented from flowing out of the defect of the cylinder barrel by gradually adjusting the pressure from small to large by pressurizing the pistons at the two ends of the cylinder barrel of the oil cylinder, so that the pressure is stabilized and the powder is kept at a certain density; the pressurizing force of the piston can enable the powder in the cylinder barrel to achieve better density, so that the pipe wall of the part is prevented from being melted through during repair, and the repair forming quality is improved.
In the step (4), the movement of the cladding head can be manually operated, or can be controlled by a multi-axis movement mechanism or an articulated robot.
And (5) taking out the cylinder after the cylinder is cooled to be close to room temperature, cleaning the cylinder, polishing and boring the repaired part and the like, so that the final size and the surface state of the cylinder meet the specified requirements.
The actuator cylinder repairing process method of the invention uses the existing metal powder laser melting additive manufacturing technology and submerged arc welding technology as reference, but is obviously different from the above method in implementation method and technical details, and the specific differences are as follows:
(1) When repairing a part by adopting a metal powder laser melting additive manufacturing method, the source of molten metal powder is mainly provided by a powder feeding pipeline arranged on a laser cladding head, the required powder feeding amount is high, and in order to ensure that the powder is conveyed to a designated position, the powder feeding amount is controlled to be about 10g/min generally by adopting higher powder feeding air pressure and flow rate; the method of the invention fills the powder into the cylinder barrel and pressurizes the powder, the original powder at the repairing position is melted mainly by laser energy, and the cladding head only provides a small amount of extra powder, namely about 1 g-3 g/min of powder, so as to increase the density of the repairing part, thereby adopting a low-pressure low-flow powder feeding mode or a mode of feeding the powder from above only by gravity.
(2) When the laser energy density is high and the metal powder laser melting additive manufacturing method is adopted to carry out single-sided forming repair on a thin-wall part with a wall thickness of only a few millimeters, the phenomenon that a molten pool is collapsed by burning-through or the forming quality of the back surface is low is easy to occur, and in order to solve the problem, the traditional method mainly comprises adding a backing plate on the back surface or adopting two methods of double-sided forming melting. The method of adding the backing plate on the back has two problems, namely, for cylinders with different diameters, the backing plate with different curvatures needs to be manufactured, waste is caused, and the backing plate is also removed in subsequent machining. Another problem is that for large aspect ratio cylinders, it is very difficult to install and remove the pads. In case of double-sided forming, special tools are required to be manufactured to send the cladding head into the cylinder barrel, so that the operation is inconvenient, and the application of the double-sided forming melting method is limited by the length-diameter ratio of the cylinder barrel and the size of the cladding head. The repairing process method can overcome the defects that: the repairing process disclosed by the invention belongs to a single-sided forming repairing process, welding operation is not required to be performed on one side of the inner wall of the cylinder barrel, and powder positioned at the inner side of a repairing position replaces a backing plate by filling the cylinder barrel with the powder and applying certain pressure, so that the effects of preventing burn-through and improving the quality of a melt are achieved. The cylinder surface inside and outside the repair location may be finished using machining.
(3) Conventional submerged arc welding is performed by filling a granular flux with components such as deoxidizing and slagging in a welding position, and then burying an arc under the flux for welding. The welding method is inconvenient in manual operation because the welding position is shielded by the flux, and therefore, the welding position and the molten pool cannot be directly observed. In addition, this method still has problems of burn-through and poor contralateral forming quality when welding thin-walled parts. The process method of the invention is easier for manual operation because the repair position is not shielded. Meanwhile, an automatic executing mechanism such as a robot is adopted to operate the cladding head to move, and automatic repair operation can be performed.
(4) The whole repair operation is carried out in the closed box body, so that the waste of metal powder is avoided. In addition, the powder bed and the cylinder barrel of the oil cylinder are preheated together, and the repair operation is carried out in a uniform temperature field.
(5) The powder and the cylinder body of the oil cylinder can be kept warm and cooled slowly in the closed box body, and the residual stress of the repaired part is small.
(6) The repairing process is suitable for repairing the cylinder barrel of the actuator hydraulic cylinder, can be used for repairing other common cylinder barrels, and is particularly suitable for repairing pipe parts with large length-diameter ratio.
Drawings
FIG. 1 is a schematic diagram of a case container for repair.
Fig. 2 is a schematic view of the cylinder installation to be repaired.
FIG. 3 is a schematic diagram of a repair process.
Fig. 4 is a schematic view of the cylinder after repair is completed.
FIG. 5 shows the density of the repair parts.
Detailed Description
For a further understanding of the present invention, the present invention is described below with reference to the examples, which are only illustrative of the features and advantages of the present invention and are not intended to limit the scope of the claims of the present invention.
The invention provides a repairing method of an actuator cylinder barrel, which adopts a metal powder melting technology to repair the wall of the cylinder barrel. The structure of the repair box adopted in the repair is shown in figure 1. The repairing box comprises a box body wall plate 1, a bottom plate 2 capable of being heated, a positioning tool 3 for installing a cylinder barrel, an inert gas inlet 4, a pressurizing piston 5 and an inert gas outlet 6; the number of the pressurizing pistons 5 is 2, and the pressurizing pistons are oppositely arranged on the box wall plate 1 and can move along the direction vertical to the box wall plate; after the cylinder body of the oil cylinder to be repaired is mounted on the positioning tool, the two pressurizing pistons 5 are respectively positioned at two sides of the cylinder body of the oil cylinder to be repaired.
Fig. 2 is a preparatory phase in the repair process of the present invention: and mounting the cylinder body to be repaired on a positioning tool, so that the defect to be repaired is upward. And gradually pouring metal powder into the box body to enable the cylinder barrel to just dip into the powder. The box is sealed with a plastic film. An inert gas (such as Ar) is introduced into the repairing box body from the inert gas inlet 4, and the gas in the box body is discharged through the inert gas outlet 6 to gradually replace the original air in the box body, so that the oxygen content in the box body is gradually reduced. The powder is heated and densified by applying a certain pressure to the powder in the cylinder by means of a pressurizing piston 5. The oxygen content in the repair box is controlled to be reduced to below 5000ppm, and the preheating temperature to be heated is 260 ℃.
Fig. 3 is an ongoing phase in the repair process of the present invention: and (3) moving the laser cladding head to enable the laser focal length to approach to the repairing position, and starting the laser to perform melt processing on the mother material and the powder at the repairing position. At the moment, the pistons at the two ends of the cylinder barrel are continuously pressurized, so that the powder in the cylinder barrel is kept compact. The densified powder acts as a backing plate to prevent collapse of the melt pool. The cladding head delivers laser energy while also providing a small amount of powder to the melt pool for improving the quality of the weld. In the repairing process, the laser power is 2.5KW, and the feeding speed of the cladding head is 16mm/min. The powder feeding speed is 2.2g/min.
FIG. 4 is a schematic view of a repaired cylinder defect according to the present invention. The powder at the position of the defect inside the cylinder barrel is melted by the laser energy, the defect of the cylinder barrel is repaired, and unmelted compact powder plays a role of a backing plate, so that the molten pool achieves the effect similar to a double-sided forming process. And slowly cooling the process box body, taking out the actuator cylinder barrel, and subsequently, mechanically processing the repaired defect position to recover the cylinder barrel to the designed size. Thus, all the repairing processes of the actuator cylinder are completed.
The density is mainly required for the repaired part, and the actual static strength of the material of the repaired part is generally not lower than the strength of the base material under the condition of higher density. FIG. 5 is a representation of a polished sample of the repaired part after the treatment by the process under an optical microscope, and the density of the repaired part can reach more than 99.9% through image processing software imageJ analysis, so that obvious defects and penetrable holes are avoided, and the actual use requirement of the actuator cylinder is met.
Claims (4)
1. A repairing method of an actuator cylinder barrel is characterized by comprising the following steps: the method adopts a metal powder melting technology to repair the wall of the oil cylinder body, and specifically comprises the following steps:
(1) Filling the defect of the cylinder barrel to be repaired with metal powder for repairing, and horizontally placing and fixing the cylinder barrel on a positioning tool in a repairing box so that the defect to be repaired is horizontally upwards; the metal powder for repairing adopts low-carbon steel gas atomization spherical powder which is made of the same material as the cylinder barrel of the actuator cylinder;
(2) Filling metal powder into the repair box until the uppermost edge of the cylinder body to be repaired just dips into the metal powder;
(3) After sealing the repair box, introducing inert gas into the repair box to reduce the oxygen content in the box, and preheating the metal powder and the cylinder body of the oil cylinder; wherein: in the step (3), controlling the oxygen content in the repair box to be lower than 5000ppm, and heating to a preheating temperature of 200-300 ℃; after the step (3), gradually regulating the pressure from small to large by pressurizing with pistons positioned at two ends of the cylinder barrel of the oil cylinder so that the metal powder in the cylinder barrel of the oil cylinder is just not prevented from flowing out from the defect of the cylinder barrel, stabilizing the pressure and keeping the powder at a certain density; then, performing the step (4);
(4) And (3) repairing: extending the laser cladding head into the repair box to align with the part to be repaired; starting laser, wherein the laser power is 2-4 KW, the feeding speed of the cladding head is 10-20 mm/min, and the powder feeding speed is 1-3 g/min;
(5) And (3) post-repair treatment: and stopping heating the metal powder, and slowly cooling the cylinder body under the protection atmosphere of inert gas.
2. The method for repairing an actuator cylinder tube according to claim 1, wherein: before the step (1), preparing before repairing, namely adopting a milling or gouging mode to clean the defect of the cylinder barrel of the oil cylinder.
3. The method for repairing an actuator cylinder tube according to claim 1, wherein: in the step (4), the movement of the cladding head can be controlled by manual operation, a multiaxial movement mechanism or an articulated robot.
4. The method for repairing an actuator cylinder tube according to claim 1, wherein: and (5) taking out the cylinder after the cylinder is cooled to be close to room temperature, cleaning the cylinder, polishing and boring the repaired part, and performing post-treatment on the repaired part to enable the final size and the surface state of the cylinder to meet the specified requirements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110337992.7A CN115138853B (en) | 2021-03-30 | 2021-03-30 | Repairing method for cylinder barrel of actuator cylinder |
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| CN202110337992.7A CN115138853B (en) | 2021-03-30 | 2021-03-30 | Repairing method for cylinder barrel of actuator cylinder |
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| CN115138853A CN115138853A (en) | 2022-10-04 |
| CN115138853B true CN115138853B (en) | 2024-03-22 |
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| CN112281156A (en) * | 2020-10-30 | 2021-01-29 | 浙江工业大学 | Laser casting repair method for conformal mold |
| CN112553617A (en) * | 2020-11-13 | 2021-03-26 | 北京动力机械研究所 | Low-stress laser cladding repair method suitable for thin-wall structure |
| CN112548106A (en) * | 2021-02-26 | 2021-03-26 | 中国航发上海商用航空发动机制造有限责任公司 | Method for repairing ultrathin structure by additive manufacturing |
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