CN105127420A - Method for repairing metal parts through diffuse printing lasers - Google Patents
Method for repairing metal parts through diffuse printing lasers Download PDFInfo
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- CN105127420A CN105127420A CN201510219258.5A CN201510219258A CN105127420A CN 105127420 A CN105127420 A CN 105127420A CN 201510219258 A CN201510219258 A CN 201510219258A CN 105127420 A CN105127420 A CN 105127420A
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Abstract
The invention discloses a method for repairing metal parts through diffuse printing lasers. According to the method, worn portions and corrosion pits diffusely distributed on the surfaces of the parts are repaired through a random printing manner; the portions of the parts to be treated are treated regularly, then defect repair is conducted on the parts to be repaired one by one through a coaxial or lateral powder feeding manner according to the different types of the parts to be repaired; the lasers can be selected according to the materials of the parts to be required and repairing materials, CO2 or solid lasers with different wavelengths are adopted, wherein the wavelength of the CO2 lasers is 10.6 micrometers, and the wavelength of the solid lasers such as optical lasers and semiconductor lasers ranges from 0.8 micrometer to 1.07 micrometers; and meanwhile, the parts in different shapes are repaired by means of the sensors in cooperation with CNC and mechanical arms. By means of the method, it is guaranteed that the profile sizes and structures meet the design requirements, the requirement for the shapes of the repaired metal parts is met, materials are saved, and the forming efficiency of the metal parts is improved greatly.
Description
Technical field
The invention belongs to materials processing technology field, particularly relate to a kind of method of discrete way laser repairing metal parts.
Background technology
Industrial part, the working environment as blade of aviation engine is extremely severe, and the defect of blade itself is as loose, grain boundary separation, equi-axed crystal etc. in addition.Cause in military service process and produce tired, wearing and tearing and pit, very serious accident can be produced in process under arms.
Along with the demand of national energy-saving reduction of discharging, green manufacturing, the part that added value is high generally all will carry out repairing manufacturing again, instead of directly throws away.The method of current parts reparation has electric welding, argon arc welding, plating, spraying and laser melting coating.But above-mentioned conventional method also exists weak point again separately.Such as, can produce large thermal deformation in the hot procedure such as electric welding, argon arc welding, heat fatigue is damaged; And electroplate, in the cold working process such as spraying coating and substrate combinating strength poor; Advanced laser melting and coating technique larger by impact that is artificial and environment, the way particularly usually adopting flood cutting abrasion face to process, greatly wastes material, and easily causes the accumulation of heat, thus cause the generation of crackle and stress concentrated.The present invention, just based on this, proposes a kind of new method of repairing metal parts.
Summary of the invention
The present invention is for solving existing part Problems existing, and namely there is mill hole and the pit (as shown in Figure 1, the discontinuously arranged hole on ring-shaped work pieces) of irregular distribution on the surface, the mode providing a kind of discrete printing carries out the reparation of part.Along with the introduction of reverse technology and 3-dimensional digital technology, the laser metal 3D developed by laser melting coating prints owing to having stronger intelligent level, may be used for the repairing of part, more reliably, more accurate.The present invention adopts and carries out Mechanical course to laser galvanometer, i.e. the mode of random exposure, or controls laser head, and according to repair path, the pit for discontinuous Dispersed precipitate is repaired one by one.In repair process, material requested is few, and the crackle not having the input of the stress collection heat of neutralization to cause, can well part restore be completed.
This technology is that one has simply, easy, the method for intelligentized laser repairing part, and laser metal forming equipment used is the equipment of advanced person combination relatively comprehensively at present, ensure that quality and the precision of reparation.Part for difformity and material all has practicality.This technology saves material, and structure property is good, and hardness is high, and quality is guaranteed, working (machining) efficiency high.
Accompanying drawing explanation
Fig. 1 wearing part and wear morphology (laser metal 3D prints rebuild part schematic diagram) thereof
Fig. 2 laser metal 3D prints the flow chart of reblading
Fig. 3 laser metal 3D prints repaired item sketch
In figure, 1. laser instrument 2. powder feed system 3. protects gas 4. control system 5. monitoring system 6. part 7. kinematic system to be repaired
Detailed description of the invention
Embodiment:
For technology contents of the present invention, Characteristic can be understood further, hereby enumerate following instance, and coordinate accompanying drawing (with reference to accompanying drawing 1, Fig. 2).Be described in detail as follows:
Embodiment 1
A kind of restorative procedure of axial workpiece, in the present embodiment, the material of macro-axis is iron-based, cladding powder used is WC or the self-fluxing alloy that ferrous alloy powder adds 5% to 10%, before reparation, 3D modeling is carried out to the surface damage situation of macro-axis, judges repair path, then processing machine is entered data into, conformal selects laser melting coating head to repair, after completing reparation, and post processing and detection entrucking.This reparation example laser instrument used is semiconductor laser, and with the combination of six shaft mechanical people, system disposition detects, sensor closed loop sensing equipment, can obtain good repair layer.
Embodiment 2
A method for blade parts, the wearing and tearing of Dispersed precipitate and pit during the present embodiment Leaf surface, after 3D scanning and reverse, obtain the digital document of area to be repaired, be input to control system, then control the galvanometer in laser instrument, carry out random exposure, complete the reparation one by one in cladding hole.That select in embodiment is CO
2the combination of laser instrument and manipulator, powder selects nickel base superalloy and titanium alloy.Owing to adopting the mode of random exposure, the stress of repair layer and crackle obtain well controlling.
Embodiment 3
A restorative procedure for liner plate part, in the present embodiment, during backing surface, the mill of Dispersed precipitate is cheated, after 3D scanning and reverse, obtain the digital document of area to be repaired, be input to control system, then control the galvanometer in laser instrument, carry out random exposure, complete the reparation one by one in cladding hole.Complete in embodiment is the combination of CO2 laser instrument and manipulator, and powder selects nickel-based self-fluxing alloy.After cladding, hardness reaches HRC50-55, meets industrial processes demand.Owing to adopting the mode of random exposure, the stress of repair layer and crackle obtain well controlling.Titanium alloy also needs to complete under vacuum or inert gas shielding, after processing, carries out post processing, then test run to repair member, and installation runs.
The processing method of the present embodiment can prevent in process that the stress caused is concentrated and distortion because large area inputs the thermal accumlation caused continuously effectively, ensures crudy, improves working (machining) efficiency.
Claims (9)
1. a method for discrete printing type laser repairing metal parts, comprising:
A. first determine the position needing to repair, secondly data acquisition is carried out to reparation position, after reverse, find out the elements of a fix in initial coordinate and each reparation hole, carry out algorithm establishment, select to determine repair path according to pit size and relative distance.
B. pretreated copy to be repaired is placed in print stations; the successively superposition on good pit of laser and alloy powder is utilized to print coating; and inert gas is carried out to print area protect, adopt various lasers, laser power, sweep speed, laser spot diameter are separately fixed.
C. post-production is carried out to metallic prosthetic part.
2. the method for a kind of discrete printing laser repairing metal parts as claimed in claim 1, it is characterized in that: be greater than when the time of the spacing in the hole of passing by the time that once row fills one deck, then in position, a hole, repair continuously, after having mended a hole, then move on to next place and treat that benefit place repairs, otherwise, be less than when the time of the spacing in the hole of passing by the time once filled, then can carry out the repairing in multiple hole, to save time simultaneously.
3. the method for a kind of discrete printing laser repairing metal parts as claimed in claim 2, is characterized in that: according to material, shape, the pit situation of rebuild part, adopts different laser instruments and automatic powder feeding system and utilize CNC or manipulator to repair.Wherein CO
2the power of laser instrument is 3000W, sweep speed 3-20mm/s, powder sending quantity 5-12g/min.Adopt solid state laser, laser power 1000W, sweep speed 5mm/s, powder sending quantity 5-20g/min.
4. the method for a kind of discrete printing laser repairing metal parts as claimed in claim 2, is characterized in that: according to cladding object, adopts material similarity principle respectively, if cast iron or steel part, adopts self-fluxing alloy or ferrous alloy; If the mode that nickel-base alloy then adopts nickel-base alloy to add ceramic particle etc. strengthens its performance.
5. the method for a kind of discrete printing laser repairing part as claimed in claim 2, is characterized in that: if injuring part requires isotropism, adopt manipulator and CO
2the mode of laser instrument and coaxial nozzle combination, if blade class, preferably adopts CO
2laser instrument and coaxial nozzle combination, if require anisotropy part, conveniently use side direction nozzle.
6. the method for a kind of discrete printing laser repairing part as claimed in claim 2, is characterized in that: described step B comprises
B1, according to the size of restoring area, determines to adopt single track reparation or multi-track overlapping reparation
The overlapping rate of B2 multi-track overlapping is generally at about 20-40%
B3, according to the situation of being heated, determines repair path, adopts interval method or continuity method.
7., as right wants the method for a kind of discrete printing laser repairing part as described in ball, it is characterized in that: described step C comprises
Metalwork after printing takes off by C1
C2 carries out post-production to the position of repairing position or the non-composite design requirement of surface accuracy
C3 carries out subsequent heat treatment, to improve structure and properties to part after reparation.
8. the method for a kind of discrete printing laser repairing part as claimed in claim 2, is characterized in that:
Coaxial and side direction powder feeding has mill diagram, gas circuit, for protection nozzle also will not have cooling water channel by scaling loss.
9. the method for a kind of random exposure laser repairing part as claimed in claim 2, is characterized in that:
In repair process, adopt monitoring and temperature, position sensor in real time to carry out closed-loop control, guarantee repairing quality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510219258.5A CN105127420A (en) | 2015-05-04 | 2015-05-04 | Method for repairing metal parts through diffuse printing lasers |
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| CN201510219258.5A CN105127420A (en) | 2015-05-04 | 2015-05-04 | Method for repairing metal parts through diffuse printing lasers |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105543837A (en) * | 2015-12-25 | 2016-05-04 | 北京有色金属研究总院 | Repair method for copper-tungsten composite structure |
| CN105921939A (en) * | 2016-04-28 | 2016-09-07 | 辽宁科技学院 | Repair method for iron base friction material |
| CN106167911A (en) * | 2016-07-31 | 2016-11-30 | 中国人民解放军装甲兵工程学院 | Photocopier roller low temperature remanufactures restorative procedure |
| CN108480629A (en) * | 2018-03-23 | 2018-09-04 | 山东矿机集团股份有限公司 | A kind of laser gain material manufacturing method of steam turbine hollow blade |
| CN109746453A (en) * | 2019-01-21 | 2019-05-14 | 沈阳精合数控科技开发有限公司 | A kind of laser repair method and device |
| CN111118495A (en) * | 2020-01-17 | 2020-05-08 | 中国航空制造技术研究院 | Method for repairing blade edge by high energy beam |
| CN111347052A (en) * | 2020-03-30 | 2020-06-30 | 重庆大云端科技有限公司 | Part repairing method and device |
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| CN101101857A (en) * | 2006-07-03 | 2008-01-09 | 奥林巴斯株式会社 | Defect repairing device |
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| US20110052386A1 (en) * | 2009-08-31 | 2011-03-03 | General Electric Company | Method of welding single crystal turbine blade tips with an oxidation-resistant filler material |
| CN102424971A (en) * | 2011-12-21 | 2012-04-25 | 西安铂力特激光成形技术有限公司 | Rapid laser repair method and device for defect of aluminum alloy guide blade |
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| CN104439884A (en) * | 2014-11-27 | 2015-03-25 | 南京先进激光技术研究院 | Mould three-dimensional rapid forming and repairing method based on reverse engineering |
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| US20030095250A1 (en) * | 2001-11-19 | 2003-05-22 | Tomoaki Kitagawa | Method of automatically repairing cracks and apparatus for use in such method |
| CN101101857A (en) * | 2006-07-03 | 2008-01-09 | 奥林巴斯株式会社 | Defect repairing device |
| US20110052386A1 (en) * | 2009-08-31 | 2011-03-03 | General Electric Company | Method of welding single crystal turbine blade tips with an oxidation-resistant filler material |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105543837A (en) * | 2015-12-25 | 2016-05-04 | 北京有色金属研究总院 | Repair method for copper-tungsten composite structure |
| CN105543837B (en) * | 2015-12-25 | 2018-06-29 | 北京有色金属研究总院 | A kind of restorative procedure of copper tungsten composite construction |
| CN105921939A (en) * | 2016-04-28 | 2016-09-07 | 辽宁科技学院 | Repair method for iron base friction material |
| CN106167911A (en) * | 2016-07-31 | 2016-11-30 | 中国人民解放军装甲兵工程学院 | Photocopier roller low temperature remanufactures restorative procedure |
| CN106167911B (en) * | 2016-07-31 | 2018-07-06 | 北京睿曼科技有限公司 | Duplicator roller low temperature remanufactures restorative procedure |
| CN108480629A (en) * | 2018-03-23 | 2018-09-04 | 山东矿机集团股份有限公司 | A kind of laser gain material manufacturing method of steam turbine hollow blade |
| CN109746453A (en) * | 2019-01-21 | 2019-05-14 | 沈阳精合数控科技开发有限公司 | A kind of laser repair method and device |
| CN111118495A (en) * | 2020-01-17 | 2020-05-08 | 中国航空制造技术研究院 | Method for repairing blade edge by high energy beam |
| CN111347052A (en) * | 2020-03-30 | 2020-06-30 | 重庆大云端科技有限公司 | Part repairing method and device |
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Application publication date: 20151209 |