CN110170739A - A kind of structure hole based on agitating friction connection remanufactures and intensifying method - Google Patents
A kind of structure hole based on agitating friction connection remanufactures and intensifying method Download PDFInfo
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- CN110170739A CN110170739A CN201910529338.9A CN201910529338A CN110170739A CN 110170739 A CN110170739 A CN 110170739A CN 201910529338 A CN201910529338 A CN 201910529338A CN 110170739 A CN110170739 A CN 110170739A
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- structure hole
- reinforcement
- agitating friction
- hole
- remanufactures
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
- B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding
- B23K20/122—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding
- B23K20/128—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding using a non-consumable tool, e.g. friction stir welding making use of additional material
Abstract
A kind of structure hole based on agitating friction connection remanufactures and intensifying method, it is characterised in that it is the following steps are included: (1) makes using metal material as matrix, reinforcement of the hard nanometer particle as reinforced phase according to the metal material type of structural member；(2) reinforcement is assembled in structure hole, starting agitating friction connects equipment, reinforcement 3 and machining area 5 is fully coupled together, and make the hard nanometer even particulate dispersion in reinforcement in machining area.(4) after frictional connection process finishing to be mixed, in the center of structure hole by being machined into required pore size, the reparation for completing structure hole crackle remanufactures and strengthens.For the present invention using agitating friction connection processing, structural member residual stress and thermal deformation are small；The crystal grain refinement of machining area is obvious, and equally distributed nano particle can also play the role of reinforced by nanoparticles around hole wall, while guaranteeing the quality of hole wall；It is environmentally protective, implement simple.
Description
Technical field
The present invention relates to a kind of remanufacturing for hole and remanufacturing and strengthening for intensifying method, especially light metal structure part hole
Method, it is specifically a kind of based on agitating friction connection structure hole remanufacture and intensifying method.
Background technique
Aerospace component will bear complicated alternating load during military service, in alternate load effect flowering structure part hole edge
It is easy to produce fatigue crack, fatigue failure occurs, reliability, safety and the service life shadow that structural member and complete machine are equipped
Sound is very big.Fatigue failure is structural member one of most important failure mode during military service, has data report, in modern industry
Every field in, the destruction of the structural strength of about 50-90% is all and the structure of fatigue failure as caused by fatigue rupture
In part most fatigue crack be derived from hole portion position, it is seen that key structure part hole failure seriously restrict complete machine reliability with
Safety.How the anti-fatigue performance for remanufacturing and how improving structural member hole is repaired for structural member hole edge micro-crack, is had become
For the important topic of vast science and technology person research.Currently, the reinforcement technique about structural member hole mainly has laser melting and coating technique, machinery
Blasting technology, laser peening, cold extrusion reinforcement technique, particle injection connect technologies such as (processing) with agitating friction.
Chinese patent (notification number: 108754121 A of CN) discloses a kind of dress that hole wall laser peening Compound Extrusion is strengthened
It sets and its method, specific method is the hole wall strengthened using laser peening with coldworking strengthened Compound Machining inner hole, pass through material
Plastic deformation improves the residual compressive stress of hole wall, and the intensity of connecting hole can be improved in this method, but laser peening system is high
It is expensive, it the extruding plug processing difficulties and is easily damaged.
Chinese patent (notification number: CN101736214B) discloses a kind of light metal surface laser impact micronano particle note
Enter intensifying method, specific method is that micro-nano granules are injected into metal material surface using laser impact intensified, obtains micro-nano
Rice grain injection reinforcing layer, to improve the hardness, wearability and fatigue behaviour of material surface.This method can obtain surface peening
Layer improves material surface property, but implements in interior wall surface of the hole extremely difficult, it is difficult to implement.
Chinese patent (notification number: 102560041 A of CN) discloses a kind of side for improving strength of metal member connection hole
Method, specific method is using mixing yoghurt to needing the region of aperture to be stirred processing on metal component, by violent
Material plasticity deformation, make regional organization refinement, densification, homogenization, to improve the intensity in hole week, this method effect
It is limited, the intensity of metal member connection hole can be improved to a certain extent.
Generally speaking, the intensifying method of existing structural member inner hole is not well positioned to meet user demand, such as mechanical spray
Ball and laser peening reinforcing will lead to inner wall and form pit, roughness requirements be not achieved, and laser peening apparatus is expensive, processing
It is costly；Cold extrusion reinforcing can only strengthen the simple hole of structure, and complicated hole is also difficult to strengthen；Laser melting coating and
Particle injection is difficult to carry out inner hole hole wall.Traditional mixing yoghurt material surface modifying passes through prefabricated ditch on the surface of the material
Slot adds nano particle to improve material surface property, and this method is also difficult to the reinforcing of structural member inner hole.
Agitating friction connection and mixing yoghurt are all the stirring actions violent using stirring tool, cause processing district material
Severe plastic deformation occurs for material, realizes refinement, homogenization and the densification of Fine Texture of Material, at present by researcher for gold
Belong to microstructure refinement, material surface modifying and composite material preparation etc..But merely using agitating friction connection and
Mixing yoghurt carrys out the fatigue strength of Strengthening Hole, and effect is frequently not apparent.
Summary of the invention
The purpose of the present invention is being difficult to carry out or the problems such as effect is unobvious for the inner-wall reinforced of existing structure part hole,
A kind of structure hole based on agitating friction connection is invented to remanufacture and intensifying method.
The technical scheme is that
A kind of structure hole based on agitating friction connection remanufactures and intensifying method, it is characterised in that it the following steps are included:
1) it according to the metal material type of structural member, makes using metal material as matrix, hard nanometer particle is as reinforced phase
The additive amount of reinforcement 3, nano particle is added according to the use demand of structural member.The diameter of reinforcement 3 and structure hole 4
Diameter is identical, and assembly relation between the two is interference fit；The height of reinforcement 3 is as the height of structure hole 4.
2) reinforcement 3 is assembled in structure hole 4, starting agitating friction connects equipment.The starting point of agitating friction connection exists
Structure hole center runs mixing needle according to the machining locus of the optimization of setting, and the form of machining locus is varied, mesh
Be to be fully coupled together reinforcement 3 and machining area 5, and the hard nanometer even particulate dispersion in reinforcement 3 is made to exist
In machining area 5.The crack forming mechanism of structure hole is remanufactured, to make machining area 5 that crackle 6 be completely covered；For structure hole
Reinforcing, 3 times more preferably greater than 4 diameter of structure hole of the diameter of machining area 5.
3) after frictional connection process finishing to be mixed, the position of stirring tool 1 is returned into starting point, makes the spoon of stirring tool 1
Hole site stays in the center of structure hole 4.At the center of structure hole 4 by being machined into required pore size, knot is completed
The reparation of structure hole crackle remanufactures and strengthens.
The reinforcement 3 is made of the method for powder metallurgy, can effectively increase the compactness between nano particle.
The diameter of the mixing needle of the stirring tool 1 is less than the diameter of structure hole 4, and such mixing needle stays on structural member
Keyhole size will not influence the processing in subsequent structural hole 4.
The diameter of the range of the machining area 5, the reinforcing for structure hole, machining area 5 is straight not less than structure hole 4
3 times of diameter.
The volume fraction of hard nanometer particle in the reinforcement 3 is 1-40%.
The beneficial effects of the present invention are:
(1) present invention is solid diffusivity process using agitating friction connection, not will cause hard nanometer particle and metallic matrix
Fusing, the defects of generated stomata, crackle being remanufactured to avoid melting welding reparation, laser melting coating, structural member residual stress with
Thermal deformation is small.
(2) present invention can make the crystal grain refinement of machining area, and hard nanometer in reinforcement by agitating friction connection
Particle is evenly distributed on around hole wall, moreover it is possible to be played the role of reinforced by nanoparticles, be improved the performance in structural member hole, moreover it is possible to strong
Guarantee the quality of hole wall while changing hole wall.
(3) treatment process of the present invention is simple, at low cost, environmentally protective, implements to be easy, especially suitable for light metal structure hole
Reparation manufacture and strengthen.
Detailed description of the invention
Fig. 1 is that the crack forming mechanism in structure of the invention hole remanufactures and strengthen schematic diagram.
Fig. 2 is the reinforcing schematic diagram in structure of the invention hole.
Fig. 3 is the reinforcing cross-sectional view in structure of the invention hole.
In figure: 1: stirring tool, 2: structural member, 3: reinforcement, 4: structure hole, 5: machining area, 6: crackle.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples, and embodiments of the present invention are not limited thereto.
As shown in Figure 1-3,
A kind of structure hole based on agitating friction connection remanufactures and intensifying method, it the following steps are included:
1) it according to the metal material type of structural member, is made by the method for powder metallurgy using metal material as matrix, hard is received
Reinforcement 3 of the rice grain as reinforced phase, powder metallurgy production can effectively increase the compactness between nano particle, nanometer
The additive amount of grain adds (reinforcement 3 under normal circumstances according to the service state of structural member and the performance of structural member parent metal
In hard nanometer particle volume fraction be 1-40%).The diameter of reinforcement 3 is identical as the diameter of structure hole 4, therebetween
Assembly relation be interference fit；The height of reinforcement 3 is as the height of structure hole 4.
2) reinforcement 3 is assembled in structure hole 4, starting agitating friction connects equipment.The starting point of agitating friction connection exists
Structure hole center is run according to the machining locus of optimization, and the form of machining locus is varied, and the purpose of machining locus is
Reinforcement 3 and machining area 5 are fully coupled together, and make hard nanometer particle in reinforcement 3 by stirring evenly point
It is dispersed in machining area 5.The size of machining area 5 determines that rule is: the crack forming mechanism of structure hole being remanufactured, to make to process
Crackle 6 is completely covered in region 5；Reinforcing for structure hole, the diameter of machining area 5 are preferably not less than the 3 of 4 diameter of structure hole
Times.The diameter of the mixing needle of stirring tool 1 in agitating friction connection equipment should be less than the diameter of structure hole 4, such mixing needle
The keyhole size stayed on structural member will not influence the processing in subsequent structural hole 4.
3) after frictional connection process finishing to be mixed, the position of stirring tool 1 is returned into starting point, makes the spoon of stirring tool 1
Hole site stays in the center of structure hole 4.At the center of structure hole 4 by being machined into required pore size, knot is completed
The reparation of structure hole crackle remanufactures and strengthens.
The present invention is not directed to branch such as mixing needle motion profile optimization etc. and is the same as those in the prior art or can be used existing skill
Art is realized.
Claims (7)
1. a kind of structure hole based on agitating friction connection remanufactures and intensifying method, it is characterised in that it the following steps are included:
(1) it according to the metal material type of structural member, makes using metal material as matrix, hard nanometer particle is as reinforced phase
Reinforcement (3)；The diameter of reinforcement (3) is identical as the diameter of structure hole (4), and assembly relation between the two is interference fit；
The height of reinforcement (3) is as the height of structure hole (4)；
(2) reinforcement (3) is assembled in structure hole (4), starting agitating friction connects equipment.The starting point of agitating friction connection exists
Structure hole (4) center runs mixing needle according to the machining locus of setting, and reinforcement (3) and machining area (5) are complete
It links together, and makes the hard nanometer even particulate dispersion in reinforcement (3) in machining area (5)；
(3) after frictional connection process finishing to be mixed, the position of stirring tool (1) is returned into starting point, makes the spoon of stirring tool (1)
Hole site stays in the center of structure hole (4)；It is complete at the center of structure hole (4) by being machined into required pore size
It remanufactures and strengthens at the reparation of structure hole crackle.
2. the structure hole according to claim 1 based on agitating friction connection remanufactures and intensifying method, it is characterized in that institute
The reinforcement (3) stated is made of the method for powder metallurgy, to effectively increase the compactness between nano particle.
3. the structure hole according to claim 1 based on agitating friction connection remanufactures and intensifying method, it is characterized in that institute
The diameter of the mixing needle for the stirring tool (1) stated is less than the diameter of structure hole (4), and such mixing needle stays in the keyhole on structural member
Size will not influence the processing of subsequent structural hole (4).
4. the structure hole according to claim 1 based on agitating friction connection remanufactures and intensifying method, it is characterized in that institute
The hard nanometer particle stated includes tungsten carbide, titanium carbide, silicon carbide, zirconium oxide, aluminium oxide, diamond and carbon nanotube powder
Deng.
5. the structure hole according to claim 1 or 4 based on agitating friction connection remanufactures and intensifying method, it is characterized in that
The additive amount of the hard nanometer particle is added according to the use demand of structural member.
6. the structure hole according to claim 5 based on agitating friction connection remanufactures and intensifying method, it is characterized in that institute
The volume fraction for the hard nanometer particle in reinforcement (3) stated is 1-40%.
7. the structure hole according to claim 1 based on agitating friction connection remanufactures and intensifying method, it is characterized in that institute
The size for the machining area (5) stated should meet: the crack forming mechanism of structure hole (4) being remanufactured, to make machining area (5) complete
It covers crackle (6)；Reinforcing for structure hole (4) will make the diameter of machining area (5) be not less than the 3 of structure hole (4) diameter
Times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910529338.9A CN110170739B (en) | 2019-06-19 | 2019-06-19 | Structural hole remanufacturing and reinforcing method based on friction stir connection |
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| CN201910529338.9A CN110170739B (en) | 2019-06-19 | 2019-06-19 | Structural hole remanufacturing and reinforcing method based on friction stir connection |
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| CN110170739A true CN110170739A (en) | 2019-08-27 |
| CN110170739B CN110170739B (en) | 2021-01-26 |
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Cited By (4)
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| CN110653480A (en) * | 2019-09-26 | 2020-01-07 | 沈阳航空航天大学 | Device and method for repairing flange plate with out-of-tolerance aperture by friction stir welding |
| CN114932304A (en) * | 2022-04-28 | 2022-08-23 | 国营四达机械制造公司 | Friction stir welding repairing method for part hole side wall chipping defect |
| CN114939662A (en) * | 2022-05-27 | 2022-08-26 | 哈尔滨工业大学 | Device and method for repairing out-of-tolerance hole through coaxial radial additive remanufacturing |
| CN115319085A (en) * | 2022-08-23 | 2022-11-11 | 中国科学院金属研究所 | Method for preparing copper-based diamond composite material based on powder stirring friction processing |
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|---|---|---|---|---|
| CN110653480A (en) * | 2019-09-26 | 2020-01-07 | 沈阳航空航天大学 | Device and method for repairing flange plate with out-of-tolerance aperture by friction stir welding |
| CN114932304A (en) * | 2022-04-28 | 2022-08-23 | 国营四达机械制造公司 | Friction stir welding repairing method for part hole side wall chipping defect |
| CN114939662A (en) * | 2022-05-27 | 2022-08-26 | 哈尔滨工业大学 | Device and method for repairing out-of-tolerance hole through coaxial radial additive remanufacturing |
| CN115319085A (en) * | 2022-08-23 | 2022-11-11 | 中国科学院金属研究所 | Method for preparing copper-based diamond composite material based on powder stirring friction processing |
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