CN110144452A - Multiple constraint layer booster-type inhibits laser impact intensified sheet deformation device and method - Google Patents
Multiple constraint layer booster-type inhibits laser impact intensified sheet deformation device and method Download PDFInfo
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- CN110144452A CN110144452A CN201910292247.8A CN201910292247A CN110144452A CN 110144452 A CN110144452 A CN 110144452A CN 201910292247 A CN201910292247 A CN 201910292247A CN 110144452 A CN110144452 A CN 110144452A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D10/00—Modifying the physical properties by methods other than heat treatment or deformation
- C21D10/005—Modifying the physical properties by methods other than heat treatment or deformation by laser shock processing
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Abstract
The invention belongs to technical field of laser processing, specifically multiple constraint layer booster-type inhibits laser impact intensified sheet deformation device and method.Increase the depressed deformation in the intensity inhibition impact process of plate in the present invention by the effect of bearing flat plate and flanging block, the bulging deformation that confines fluid layer inhibits come increasing action impact process in the pressure mode of shock surface is filled with by the closed gap between rigid beam layer and plate, therefore it can be good at inhibiting the buckling deformation of plate, laser-impact efficiency is improved, laser impact intensified effect is improved.
Description
Technical field
The invention belongs to technical field of laser processing, specifically multiple constraint layer booster-type inhibits laser impact intensified plate to become
Shape device and method refer in particular to inhibit plate deformation device during laser impact intensified, improve Effect of Laser Shock Processing.
Background technique
Laser impact intensified (LSP) technology is a kind of novel process for treating surface, is to utilize high-energy density (GW/cm2
Magnitude), short pulse (10ns-30ns magnitude) laser-impact material surface, on the surface of material due to absorbed layer transient absorption
Height can induce generation plasma, and plasma can generate shock wave under the constraint of its restraint layer and on the surface of the material to material
Inside propagated, make to generate plastic deformation and dislocation structure in material surface certain area, be formed in material surface larger
Residual compressive stress, improve the fatigue strength and corrosion resistance of material.Reiforcing laser impact technology is widely used in navigating at present
Empty space flight, automobile and other mechanical manufacturing fields, the service life of Lai Tigao material.
Due to the great force that plasma instant of detonation generates during laser impact intensified plate, to plasticity and
The preferable alloy of toughness, when laser-impact, can generate warping phenomenon.When plate is deformed, the effect of laser-impact is influenced whether
Fruit just needs mechanical mode to carry out correction process plate, it is strong that this can destroy laser-impact if deformation is larger after laser-impact
The effect of change, also will increase machining operation.Therefore it needs to inhibit its blastic deformation during laser impact intensified plate.
Summary of the invention
In view of the above technical problems, the present invention provides a kind of multiple constraint layer booster-type inhibition laser impact intensified sheet deformation
Device inhibits blastic deformation, improves shock peening effect.
The specific technical solution that the present invention uses is as follows:
A kind of laser impact intensified sheet deformation device of multiple constraint layer booster-type inhibition, which is characterized in that described device packet
Include laser generator, reflecting mirror, condenser lens, flanging block, rigid constraint layer, hydraulic pump, bearing flat plate, numerical control table, NC table, energy
Measure absorbed layer, plate, confines fluid layer, pressure sensor, hydraulic cavities, hydraulic valve, center digital control system；Bearing flat plate is fixed on
On numerical control table, NC table, hydraulic cavities are located on bearing flat plate, and energy-absorbing layer is puted up on plate, plate is then put into hydraulic cavities
Interior, rigid constraint layer covers and forms sealing structure in hydraulic cavities, then to the middle ware formed between plate and rigid constraint layer
It is filled with fluid in gap layer and forms confines fluid layer in hydraulic cavities, is equipped with pressure sensor in hydraulic cavities, hydraulic cavities are external hydraulic
Pump and hydraulic valve；Flanging block is located at rigid constraint layer upper periphery position for fixing rigid constraint layer；Central control system connection
Laser generator and pressure sensor, the laser that laser generator issues successively pass through reflecting mirror, and condenser lens carries out plate
Shock peening.
Using described device inhibit laser impact intensified in slim sheet deformation method, characterized in that pass through Zhi Chengping
Depressed deformation in intensity inhibition impact process of the effect of plate and flanging block to increase plate, passes through rigid constraint layer and plate
Between be filled with confines fluid layer in the middle gap layer that is formed and carry out increasing action and inhibit to impact in the pressure mode of shock surface
The bulging deformation of journey, to inhibit deformation of the plate in impact process, the specific steps are as follows:
A, plate is pre-processed；
B, energy-absorbing layer is sticked in plate surface；
C, the plate for posting energy-absorbing layer is placed in hydraulic cavities, and places rigidity about at the top 5-8mm of plate
Beam layer is formed simultaneously intermediate gaps layer, and fixes rigid constraint layer with flanging block；
D, the intermediate gaps layer using hydraulic pump into hydraulic cavities is filled with fluid, is formed between plate and rigid constraint layer
Intermediate gaps layer in obtain confines fluid layer；
E, pressure value required in corresponding hydraulic cavities is set on central control system, is passed by the pressure in hydraulic cavities
Sensor feedback controls hydraulic pump into control system and carries out the pressure value that work reaches set；
F, the parameter of laser generator is adjusted according to parameter needed for impact, and compiler control numerical control work is flat
The movement of platform；
G, shock peening processing is carried out to plate, after the completion and started the cleaning processing.
1. enhancing using bearing flat plate and flanging block the intensity of plate, inhibit recess of the plate in impact process
Deformation is filled with confines fluid layer mode in the intermediate gaps layer of plate and rigid constraint layer to increase pressure, keeps pressure positive
The bulging deformation in the shock surface inhibition impact process of plate is acted on, while the presence of hydraulic cavities is the void layer for guaranteeing to be formed
Surrounding is closed.
2. sample to be processed is carried out grinding step by step using abrasive paper for metallograph and handled by the pretreatment in the step A described
Afterwards, and with polishing machine it is polished, is then placed on the dust and grease stain for removing surface in alcoholic solution with supersonic wave cleaning machine.
3. in the step B described, energy-absorbing layer is aluminium foil, pitch-dark or black tape.
4. in the step C described, the surfacing of bearing flat plate, effect is to enhance the intensity of toughness plate.Rigidity
Restraint layer is high-intensitive polycarbonate glass plate, is commonly called as " space glass ", forms intermediate gaps layer 5-8mm's between plate
Purpose is to be filled with confines fluid layer to increase pressure.
5. hydraulic pump is high-pressure pump in the step D described, the desirable value of different pressures can be reached.It is in hydraulic cavities
Air-tight state, formed by flanging block when being fixed and clamped rigid constraint layer it is closed, in contact of the rigid constraint layer with hydraulic cavities
Face ensures to be formed good airtightness using sealing joint strip.
6. in the step E described, the pressure sensor in hydraulic cavities can detect the pressure value in hydraulic cavities in real time,
Hydraulic pump is controlled by feeding back into central control system；Required pressure value is in 100MPa- in the hydraulic cavities
In 200MPa strength range.
7. in the step F described, the pulse Nd:YAG laser that laser generator uses, running parameter are as follows: wavelength
1064nm, pulse width 5-10ns, single pulse energy 1.5-10J, spot radius 1-3mm, hot spot overlapping rate 50%.
The intensity for increasing plate in the present invention by the effect of bearing flat plate and flanging block inhibits recessed in impact process
Notch distortion is filled with confines fluid layer by the closed gap between rigid beam layer and plate come increasing action in the pressure side of shock surface
Formula inhibits the bulging deformation of impact process, therefore can be good at inhibiting the buckling deformation of plate.So present device energy
Enough effective deformations for inhibiting plate in impact process, improve laser-impact efficiency, improve laser impact intensified effect.
Detailed description of the invention
In ord to more clearly illustrate embodiments of the present application or technical solution in the prior art, it below will be to example or existing
Attached drawing needed in technical description is briefly described.
Fig. 1 is laser impact intensified device figure described herein.
In Fig. 1,1-- laser generator, 2-- reflecting mirror, 3-- condenser lens, 4-- flanging block, 5-- rigid constraint layer, 6--
Hydraulic pump, 7-- bearing flat plate, 8-- numerical control workbench, 9-- energy-absorbing layer, 10-- plate, 11-- confines fluid layer, 12--
Pressure sensor, 13-- hydraulic cavities, 14-- hydraulic valve, the center 15-- digital control system.
Specific embodiment
In the following with reference to the drawings and specific embodiments, further details of the technical solution of the present invention.
6061-T6 aluminium alloys of selection are research object, and 6061-T6 materials are cut into 50mm × 50mm × 4mm sample,
Sand for surface paper is polishing to 2000 mesh from 800 mesh step by step, then carries out surface polishing to sample, and the sample after polishing is placed on
Ultrasonic washing instrument clean the surface is used in alcoholic solution.
The specimen surface pre-processed spraying is pitch-dark as energy-absorbing layer 9, the good pitch-dark sample of spraying is placed into liquid
Press chamber 13 in, then rigid constraint layer 5 is fixed in hydraulic cavities 13 with the flanging block 4 of surrounding, and plate 10 and rigidity about
The closed clearance layer of 5-8mm is formed between beam layer 5 to be filled with confines fluid layer 11.Bearing flat plate 7 and flanging block 4 can be to plates
Play the role of fixed and increases intensity.It is by the pressure value that central control system 15 is arranged in corresponding hydraulic cavities 13
Then 150MPa controls hydraulic pump 6 by central control system and works, to carrying out being filled with liquid in hydraulic cavities 13.It is hydraulic
When pressure value in chamber 13 reaches predetermined set value by pressure sensor 12, it can feed back on central control system 15, then
Control hydraulic pump stops working.Corresponding laser-impact parameter is set in central control system 15, then controls laser
Device 1 carries out laser-impact experiment.In this example, the parameter of laser is set as wavelength 1064nm, pulse width 10ns, pulse energy
Amount is 5J, spot diameter 3mm, overlapping rate 50%, number of shocks are twice.Hydraulic valve 14 is opened after the completion of impact, by liquid
The liquid discharge in chamber 13 is pressed, the sample impacted is then taken out.And the plate after the completion of impact is started the cleaning processing.
The main reason for being inhibited during laser-impact to plate blastic deformation using the present apparatus is by bearing flat plate 7
Effect with flanging block 4 inhibits the depressed deformation impacted in raw to increase the intensity of plate, passes through rigid constraint layer 5 and plate
The closed clearance layer that is formed between 10, which is filled with confines fluid layer 11, to be carried out increasing action and inhibits to impact in the pressure mode of shock surface
The bulging deformation of journey, therefore can be good at inhibiting the buckling deformation of plate.Therefore device is able to suppress plate in laser-impact
Deformation in the process improves laser impact intensified effect.
Claims (8)
1. multiple constraint layer booster-type inhibits laser impact intensified sheet deformation device, which is characterized in that described device includes laser
Generator, reflecting mirror, condenser lens, flanging block, rigid constraint layer, hydraulic pump, bearing flat plate, numerical control table, NC table, energy absorption
Layer, plate, confines fluid layer, pressure sensor, hydraulic cavities, hydraulic valve, center digital control system；Bearing flat plate is fixed on numerical control work
To make on platform, hydraulic cavities are located on bearing flat plate, and energy-absorbing layer is puted up on plate, and then plate is put into hydraulic cavities, rigidity
Restraint layer covers and forms sealing structure in hydraulic cavities, then fills into the middle gap layer formed between plate and rigid constraint layer
Enter fluid and form confines fluid layer in hydraulic cavities, is equipped with pressure sensor in hydraulic cavities, the external hydraulic pump of hydraulic cavities and hydraulic
Valve；Flanging block is located at rigid constraint layer upper periphery position for fixing rigid constraint layer；Central control system connects laser
Device and pressure sensor, the laser that laser generator issues successively pass through reflecting mirror, and condenser lens carries out shock peening to plate.
2. using device as described in claim 1 inhibit laser impact intensified in slim sheet deformation method, which is characterized in that
Increase the depressed deformation in the intensity inhibition impact process of plate by the effect of bearing flat plate and flanging block, about by rigidity
It is filled with confines fluid layer in the middle gap layer formed between beam layer and plate and carrys out increasing action in the pressure mode of shock surface
The bulging deformation for inhibiting impact process, to inhibit deformation of the plate in impact process, the specific steps are as follows:
A, plate is pre-processed；
B, energy-absorbing layer is sticked in plate surface；
C, the plate for posting energy-absorbing layer is placed in hydraulic cavities, and places rigid constraint layer at the top 5-8mm of plate
It is formed simultaneously intermediate gaps layer, and fixes rigid constraint layer with flanging block；
D, the intermediate gaps layer using hydraulic pump into hydraulic cavities is filled with fluid, is formed between plate and rigid constraint layer
Between obtain confines fluid layer in void layer；
E, pressure value required in corresponding hydraulic cavities is set on central control system, passes through the pressure sensor in hydraulic cavities
It feeds back in control system and controls hydraulic pump and carry out the pressure value that work reaches set；
F, the parameter of laser generator is adjusted according to parameter needed for impact, and compiler controls numerical control workbench
Movement；
G, shock peening processing is carried out to plate, after the completion and started the cleaning processing.
3. method according to claim 2, which is characterized in that the pretreatment in step A described uses abrasive paper for metallograph
It after sample to be processed is carried out the processing of grinding step by step, and is polished with polishing machine, is then placed in alcoholic solution and uses ultrasonic wave
The dust and grease stain on cleaning machine removing surface.
4. method according to claim 2, which is characterized in that in the step B described, energy-absorbing layer is aluminium foil, pitch-dark
Or black tape.
5. method according to claim 2, which is characterized in that in the step C described, the surfacing of bearing flat plate,
Effect is to enhance the intensity of toughness plate；Rigid constraint layer is polycarbonate glass plate, and intermediate gaps layer is formed between plate
The purpose of 5-8mm is to be filled with confines fluid layer to increase pressure.
6. method according to claim 2, which is characterized in that in the step D described, hydraulic pump is high-pressure pump, Neng Gouda
To the desirable value of different pressures；It is air-tight state in hydraulic cavities, is formed by flanging block when being fixed and clamped rigid constraint layer close
It closes, ensures to be formed good airtightness using sealing joint strip in rigid constraint layer and the contact surface of hydraulic cavities.
7. method according to claim 2, which is characterized in that the pressure sensor energy in the step E described, in hydraulic cavities
Pressure value in enough hydraulic cavities of detection in real time, controls hydraulic pump by feeding back into central control system；It is described
Required pressure value is in 100MPa-200MPa strength range in hydraulic cavities.
8. method according to claim 2, which is characterized in that in the step F described, the pulse of laser generator use
Nd:YAG laser, running parameter are as follows: wavelength 1064nm, pulse width 5-10ns, single pulse energy 1.5-10J, hot spot half
Diameter 1-3mm, hot spot overlapping rate 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910292247.8A CN110144452B (en) | 2019-04-12 | 2019-04-12 | Multi-constrained-layer supercharged device and method for inhibiting deformation of laser shock strengthened plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910292247.8A CN110144452B (en) | 2019-04-12 | 2019-04-12 | Multi-constrained-layer supercharged device and method for inhibiting deformation of laser shock strengthened plate |
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| CN110144452B CN110144452B (en) | 2021-04-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112063831A (en) * | 2020-09-08 | 2020-12-11 | 中国航空制造技术研究院 | Water confinement layer regulating and controlling device and method for metal plate laser shot blasting |
| CN113967797A (en) * | 2021-10-26 | 2022-01-25 | 江苏大学 | Method and device for detecting pressure of laser shock liquid micro-forming shock wave |
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| EP0416988A1 (en) * | 1989-09-05 | 1991-03-13 | Centre National De La Recherche Scientifique (Cnrs) | Device for laser shock treatment of work pieces |
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| CN103725867A (en) * | 2013-12-23 | 2014-04-16 | 江苏大学 | Laser shock treatment method and device of porous plate |
| CN105458496A (en) * | 2015-12-16 | 2016-04-06 | 江苏大学 | Synchronous welding and forming method and device for laser shock metal foil plates |
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Patent Citations (7)
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| EP0416988A1 (en) * | 1989-09-05 | 1991-03-13 | Centre National De La Recherche Scientifique (Cnrs) | Device for laser shock treatment of work pieces |
| FR2714320A1 (en) * | 1993-12-27 | 1995-06-30 | Gec Alsthom Electromec | Laser beam surface treatment of metal |
| CN1654157A (en) * | 2005-03-04 | 2005-08-17 | 江苏大学 | Laser impinging composite constrained layer |
| CN102560079A (en) * | 2012-01-05 | 2012-07-11 | 江苏大学 | Laser shock peening method and device using high-pressure gas as constrained layer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112063831A (en) * | 2020-09-08 | 2020-12-11 | 中国航空制造技术研究院 | Water confinement layer regulating and controlling device and method for metal plate laser shot blasting |
| CN113967797A (en) * | 2021-10-26 | 2022-01-25 | 江苏大学 | Method and device for detecting pressure of laser shock liquid micro-forming shock wave |
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| CN110144452B (en) | 2021-04-20 |
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