CN101701282A - Method for strengthening complex surface based on laser shock wave technology and device thereof - Google Patents
Method for strengthening complex surface based on laser shock wave technology and device thereof Download PDFInfo
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- CN101701282A CN101701282A CN200910213599A CN200910213599A CN101701282A CN 101701282 A CN101701282 A CN 101701282A CN 200910213599 A CN200910213599 A CN 200910213599A CN 200910213599 A CN200910213599 A CN 200910213599A CN 101701282 A CN101701282 A CN 101701282A
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Abstract
The invention relates to a method for strengthening a complex surface based on laser shock wave technology and a device thereof, belonging to the field of laser surface treatment. The device consists of a workpiece fixture system, an optical system, a suspension liquid supply and recovery system and a control system. The method comprises: first, carrying out ultrasonic wave treatment on laser absorbing substance powder with nano-scale particle size and transparent liquid to form evenly mixed suspension liquid; and then, spraying the suspension liquid on the part of a workpiece to be strengthened. When the part of the workpiece to be strengthened is irradiated by a laser beam, the laser beam firstly passes through the suspension liquid, the laser absorbing substance inside the suspension liquid is gasified and ionized after absorbing the laser energy, and cylindrical surface shock wave taking the laser beam as a center is formed and spread all around, thus carrying out impact strengthening on the surface of the workpiece. The invention is especially suitable for synchronously carrying out the impact strengthening on the hole wall, hole bottom and the hole periphery of a blind hole with small diameter as well as the surface which can not be directly irradiated by the laser beam.
Description
Technical field
The present invention relates to the Laser Surface Treatment field, refer in particular to a kind of method and apparatus of the strengthening complex surface based on the induced with laser shock wave technology, be particularly useful at the bottom of the hole wall, hole to the minor diameter blind hole and the hole circumferential surface is carried out laser impact intensifiedly simultaneously, and the surface that laser beam can't shine directly into carried out shock peening.
Background technology
Laser impact intensified is to utilize laser beam and workpiece surface material (or to be coated on the material of the raising laser absorption rate of workpiece surface, being the absorption layer material) shockwave that interact to produce is as the power source, make workpiece surface material generation viscous deformation, thereby make the dense structureization of surfacing, and form unrelieved stress layer with certain depth, reach the purpose that improves workpiece fatigue strength, corrosion resistance nature.(Zhang Yongkang etc. improve the method for corrosion resistance of magnesium alloy based on reiforcing laser impact technology. Chinese patent application number: 200610097397.6; H.Clauer, Allan; Et al.United States Patent Application:20030024904; Sano; Yuji; Et al.United States Patent Application:20070262063).
Existing reiforcing laser impact technology can only be strengthened the surface that laser beam shines directly into, and then difficulty relatively of shock peening is directly carried out on the surface that can't shine laser beam; The surface of wanting this class laser beam of object aperture hole wall to shine directly into is carried out laser impact intensified, must use this class device of reflection cone.
Zhang Yongkang etc. propose a kind of enhancement method and device based on the laser shock wave technology hole wall in Chinese patent ZL200610096476.5, in the method, the absorption layer absorbed laser energy on the reflection cone surface that utilization inserts in the hole from the aperture below, form shockwave after the gasification of absorption layer material, the ionization, shockwave is propagated to hole wall from the reflection cone surface, thereby realizes the reinforcement to hole wall.This method is applicable to the hole wall reinforcement of through hole, is not suitable for blind hole, and must make reflection cone according to the diameter in hole.
The invention provides and a kind ofly not only can carry out shock peening the surface that laser can shine directly into, can also carry out the method and apparatus of shock peening to the surface that laser beam can't shine directly into, be particularly useful at the bottom of the hole wall, hole to the minor diameter blind hole and the hole circumferential surface is carried out laser impact intensified simultaneously.
Summary of the invention
The objective of the invention is to provide a kind of laser impact intensified method and apparatus, it not only can carry out shock peening to the workpiece surface that laser shines directly into, and can also carry out laser impact intensified to the complex surface that laser can't shine.
A kind of method of the strengthening complex surface based on laser shock wave technology is characterized in that: with the granularity be the laser absorption material powder of nanometer scale and suspension liquid that transparent liquid mixes as the laser absorption material, substitute laser absorption layer and restraint layer.
In the aforesaid method, the laser absorption material powder refers to carbon dust or Al powder, and transparent liquid refers to water or glycerine.
In the aforesaid method, the laser absorption material powder in the suspension liquid and the weight ratio of transparent liquid are: carbon dust accounts for 1%～3% of suspension liquid gross weight, if use aluminium powder, then aluminium powder accounts for 2%～5% of suspension liquid gross weight.
Principle of the present invention is: the suspension liquid that will contain the laser absorption material covers workpiece surface, when laser beam passes suspension liquid, laser absorption material grains in the suspension liquid absorbs the laser energy gasification, ionization forms with this particle is the liquid lower peripheral surface shockwave of core, it is the cylindrical wave at center and perpendicular to the almost plane ripple of laser beam that comprehensive action after all particles of laser beam propagation direction absorb laser energies forms with the laser beam, wherein cylindrical wave can to surface that laser can't shine directly into carry out shock peening to propagating all around.
The device of implementing this method comprises workpiece clamp system, optical system, Controlling System, it is characterized in that: be provided with suspension liquid supply recovery system, suspension liquid supply recovery system comprises liquid storing barrel, liquid barrier, fluid filling pump, pipeline, nozzle and magnetic valve; Nozzle is positioned at the worktable top, and nozzle links to each other with magnetic valve, fluid filling pump and liquid storing barrel successively successively by pipeline.
In the said apparatus, liquid barrier is installed in around the worktable, and an adjacent opening with liquid storing barrel is so that suspension liquid flows back to liquid storing barrel.
In the said apparatus, workpiece clamp system comprises workpiece, anchor clamps and worktable; Optical system comprises laser generator and speculum; Controlling System comprises suspension liquid supply recovery system control device, computer, Worktable control device and laser generator control device.
Implementation process of the present invention is as follows:
1. the laser absorption material powder that with granularity is nanoscale mixes, stirs evenly with transparent liquid, handles with ultrasonic wave then, makes laser absorption material grains uniform distribution in transparent liquid;
2. the suspension liquid after the ultrasonication is packed in the liquid storing barrel;
3. with anchor clamps workpiece is installed on the worktable;
4. the startup fluid filling pump sends instruction by computer, regulates the suspension liquid flow by the aperture of suspension liquid supply recovery system control device control magnetic valve, makes workpiece treat that the strengthening surface place is covered by suspension liquid;
5. computer sends finger, sends laser pulse by laser generator control device control laser apparatus by selected parameter;
6. the suspension liquid for the treatment of the strengthening surface place is passed in the laser generator pulse of sending after mirror reflects, and the laser material absorbing laser energy gasification in the suspension liquid, ionization form shockwave, propagate into workpiece surface by suspension liquid, and shock peening is carried out on the surface;
7. computer is regulated worktable by Worktable control device and is pressed the desired trajectory motion, workpiece surface is carried out pointwise impact, and finishes up to treating that all strengthening surface impacts.
Use method of the present invention to the shallow bore hole of diameter less than laser spot diameter, at the bottom of can once finishing the hole, the shock peening of hole wall, hole perimeter surface, and conventional laser impact intensified method must be carried out several times, and the necessary oblique incidence of laser beam when hole wall is strengthened, workpiece rotates the reinforcement that just can finish whole hole wall circumferential surface one by one then.As shown in Figure 2, in the hole of diameter 3mm, dark 4mm, inject the suspension liquid of forming by 1% carbon dust and water, and make suspension liquid flow through the hole perimeter surface, be 35J with energy then, pulse width is 23ns, spot diameter is the laser beam irradiation aperture of 8mm, at the bottom of then one-shot can make hole wall, hole, the hole perimeter surface strengthened simultaneously.
For the deep hole of minor diameter, conventional laser impact intensified method can't be strengthened hole wall, uses method of the present invention, by the mode of liquid level in the control aperture hole wall is carried out the segmentation shock peening.As shown in Figure 3, aperture 3mm, hole depth 30mm then can divide four sections and carry out shock peening, uses the suspension liquid of being made up of 1% carbon dust and water in this example, and laser parameter is energy 40J, pulse width 23ns, spot diameter 3mm.Make the suspension liquid liquid level reach 7.5mm place (being the y1 plane) at the bottom of the hole earlier, utilize the monopulse laser beam to carry out the first time and impact, can make at the bottom of the hole and the hole wall in Kongzui deep is strengthened; Make liquid level reach 15mm place (being the y2 plane) at the bottom of the hole then, carry out impacting the second time time deep hole wall is strengthened, make liquid level reach 22.5mm place at the bottom of the hole again, impact for the third time, hole time top hole wall is strengthened, the suspension liquid liquid level is reached more than the aperture, impact for the last time, finish the reinforcement of whole hole wall.
Use method of the present invention to carry out shock peening simultaneously at grade a plurality of surfaces not.Surperficial I, II as shown in Figure 4, III can once finish shock peening: difference of altitude is 10mm between surperficial I and the III, the suspension liquid that uses 2% aluminium powder and glycerine to form, to increase the viscosity of suspension liquid in vertical surface, laser parameter is energy 40J, pulse width 23ns, spot diameter 6mm makes the axis of laser beam be positioned at planar I I, carry out two pulse and impact, 3mm zone and the surperficial II of surperficial I, III are strengthened.
Use method of the present invention can also carry out shock peening to the surface that laser beam can't shine directly into, A surface as shown in Figure 5 in addition.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified:
The strengthening complex surface device synoptic diagram that Fig. 1 the present invention proposes based on laser shock wave technology.
1. suspension liquid supply recovery system control device 2. computers 3. Worktable control devices 4. laser generator control device 5. laser generators 6. laser beams 7. speculums 8. anchor clamps 9. workpiece 10. worktable 11. nozzles 12. suspension liquids 13. magnetic valves 14. pipelines 15. fluid filling pumps 16. liquid barriers 17. liquid storing barrels
At the bottom of the hole wall of Fig. 2 shallow bore hole, the hole, the hole perimeter surface strengthens synoptic diagram synchronously
Fig. 3 Small-deep Hole hole wall is strengthened synoptic diagram
Fig. 4 not at grade multilist face strengthens synoptic diagram synchronously
1 II vertical surface III plane 2, I plane
Fig. 5 laser can't direct irradiation surface strengthening synoptic diagram
The surface that A laser can't shine directly into
Embodiment
Describe the details and the working condition of the concrete device of the present invention's proposition in detail below in conjunction with accompanying drawing.
This device comprises workpiece clamp system, optical system, suspension liquid supply recovery system, Controlling System.Wherein workholder is made up of workpiece 8, anchor clamps 9, worktable 10; Optical system is made up of laser generator 5, laser beam 6, speculum 7; Suspension liquid supply recovery system is made up of nozzle 11, suspension liquid 12, magnetic valve 13, pipeline 14, fluid filling pump 15, liquid barrier 16, liquid storing barrel 17; Controlling System is made up of suspension liquid supply recovery system control device 1, computer 2, Worktable control device 3, laser generator control device 4.
At first workpiece 8 is fixed on the worktable 10 by anchor clamps 9; Start fluid filling pump 15 then, send instruction by computer 2, by the aperture that suspension liquid supply recovery system control device 1 is regulated magnetic valve 13, suspension liquid 12 sprays to the strengthening surface for the treatment of of workpiece 8 through pipeline 14, magnetic valve 13, nozzle 11; Computer 2 sends instruction and regulates laser apparatus 5 through laser generator control device 4, laser apparatus 5 gives off laser beam and 6 waits that to workpiece 8 strengthening the position shines through speculum 7 reflection back, when laser beam 6 passes workpiece 8 and waits to strengthen the suspension liquid 12 at position, gasification behind the laser absorption material absorbing laser energy in the suspension liquid 12, ionization form shockwave and propagate to workpiece surface, carry out shock peening thereby treat strengthening surface; Computer 2 sends instruction by 10 motions of Worktable control device 3 control worktable, and the pointwise shock peening is carried out on workpiece 8 surfaces, strengthens until whole work-piece to finish.
Claims (6)
1. method based on the strengthening complex surface of laser shock wave technology is characterized in that: with the granularity be the laser absorption material powder of nanometer scale and suspension liquid that transparent liquid mixes as the laser absorption material, substitute laser absorption layer and restraint layer.
2. the method for the described surface strengthening of claim 1, it is characterized in that: the laser absorption material powder refers to carbon dust or Al powder, and transparent liquid refers to water or glycerine.
3. the method for the described surface strengthening of claim 1, it is characterized in that: the laser absorption material powder in the suspension liquid and the weight ratio of transparent liquid are: carbon dust accounts for 1%～3% of suspension liquid gross weight, if use aluminium powder, then aluminium powder accounts for 2%～5% of suspension liquid gross weight.
4. the method for the described surface strengthening of claim 1 is specially:
(1) is that the laser absorption material powder of nanoscale mixes, stirs evenly with transparent liquid with granularity, handles with ultrasonic wave then, make laser absorption material grains uniform distribution in transparent liquid;
(2) suspension liquid after the ultrasonication is packed in the liquid storing barrel, workpiece is installed on the worktable with anchor clamps;
(3) start fluid filling pump, send instruction, regulate the suspension liquid flow, make workpiece treat that the strengthening surface place is covered by suspension liquid by the aperture of suspension liquid supply recovery system control device control magnetic valve by computer;
(4) computer sends instruction, sends laser pulse by laser generator control device control laser apparatus by selected parameter;
(5) suspension liquid for the treatment of the strengthening surface place is passed in the laser generator pulse of sending after mirror reflects, and the laser material absorbing laser energy gasification in the suspension liquid, ionization form shockwave, propagate into workpiece surface by suspension liquid, and shock peening is carried out on the surface;
(6) computer is regulated worktable by Worktable control device and is pressed the desired trajectory motion, workpiece surface is carried out pointwise impact, and finishes up to treating that all strengthening surface impacts.
5. implement the device of the described method of claim 1, comprise workpiece clamp system, optical system, Controlling System, it is characterized in that: be provided with suspension liquid supply recovery system, suspension liquid supply recovery system comprises liquid storing barrel (17), liquid barrier (16), fluid filling pump (15), pipeline (14), nozzle (11) and magnetic valve (13); Nozzle (11) is positioned at worktable (10) top, and nozzle (11) links to each other with magnetic valve (13), fluid filling pump (15) and liquid storing barrel (17) successively successively by pipeline (14).
6. the described device of claim 5, it is characterized in that: liquid barrier (16) is installed in worktable (10) all around, and an adjacent opening with liquid storing barrel (17) is so that suspension liquid flows back to liquid storing barrel (17).
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| CN2009102135996A CN101701282B (en) | 2009-10-30 | 2009-10-30 | Method for strengthening complex surface based on laser shock wave technology and device thereof |
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Cited By (12)
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| CN102212818A (en) * | 2011-05-11 | 2011-10-12 | 江苏大学 | Method and device for inducing nanocrystallization of metal surface through shock wave-accelerated nano particles |
| CN102409292A (en) * | 2011-11-18 | 2012-04-11 | 江苏大学 | Method and device for continuously synthesizing diamond membrane by radiating carbon nanotube with strong laser |
| CN102489879A (en) * | 2011-11-18 | 2012-06-13 | 江苏大学 | Life prolonging method for quickly repairing microcracks of pump parts and life prolonging device for quickly repairing microcracks of pump parts |
| CN102676750A (en) * | 2012-05-09 | 2012-09-19 | 江苏大学 | Method and device for compositely modifying medical titanium alloy by laser gas nitriding and impacting |
| WO2012174768A1 (en) * | 2011-06-24 | 2012-12-27 | 江苏大学 | Method and apparatus for micro-nano particle implanting with laser shockwave induction |
| CN103710493A (en) * | 2013-12-23 | 2014-04-09 | 江苏大学 | Laser shock processing method and device for liquid-state absorbing layer and liquid-state restraint layer |
| CN104141035A (en) * | 2014-08-26 | 2014-11-12 | 江苏大学 | Method and device for reinforcing hole wall by virtue of annular laser band impact |
| CN104475976A (en) * | 2014-11-19 | 2015-04-01 | 江苏大学 | Method and device for etching transparent insulating material by adopting magnetic powder induction type laser plasma |
| CN105463179A (en) * | 2015-11-22 | 2016-04-06 | 沈阳黎明航空发动机(集团)有限责任公司 | Metal surface nanometer powder permeating method based on laser induction shock waves |
| EP3450577A1 (en) * | 2017-09-04 | 2019-03-06 | Toyota Jidosha Kabushiki Kaisha | Component manufacturing method and component |
| TWI658144B (en) * | 2018-03-07 | 2019-05-01 | National Taipei University Of Technology | System and method for strengthening a surface of a workpiece |
| CN111074061A (en) * | 2020-01-07 | 2020-04-28 | 山东大学 | Uniform surface strengthening method based on laser shock wave |
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- 2009-10-30 CN CN2009102135996A patent/CN101701282B/en not_active Expired - Fee Related
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| CN102212818A (en) * | 2011-05-11 | 2011-10-12 | 江苏大学 | Method and device for inducing nanocrystallization of metal surface through shock wave-accelerated nano particles |
| CN102212818B (en) * | 2011-05-11 | 2012-08-22 | 江苏大学 | Method and device for inducing nanocrystallization of metal surface through shock wave-accelerated nano particles |
| WO2012151788A1 (en) * | 2011-05-11 | 2012-11-15 | 江苏大学 | Method and apparatus for nanometerizing shock wave-accelerated nanoparticle-induced metal surface |
| US9580815B2 (en) | 2011-05-11 | 2017-02-28 | Jiangsu University | Method and apparatus for nanocrystallizing a metal surface by shock wave-accelerated nanoparticles |
| WO2012174768A1 (en) * | 2011-06-24 | 2012-12-27 | 江苏大学 | Method and apparatus for micro-nano particle implanting with laser shockwave induction |
| CN102409292A (en) * | 2011-11-18 | 2012-04-11 | 江苏大学 | Method and device for continuously synthesizing diamond membrane by radiating carbon nanotube with strong laser |
| CN102489879A (en) * | 2011-11-18 | 2012-06-13 | 江苏大学 | Life prolonging method for quickly repairing microcracks of pump parts and life prolonging device for quickly repairing microcracks of pump parts |
| CN102676750A (en) * | 2012-05-09 | 2012-09-19 | 江苏大学 | Method and device for compositely modifying medical titanium alloy by laser gas nitriding and impacting |
| CN103710493B (en) * | 2013-12-23 | 2015-12-09 | 江苏大学 | The laser impact processing method of the liquid restraint layer of a kind of liquid absorbent layer and device |
| CN103710493A (en) * | 2013-12-23 | 2014-04-09 | 江苏大学 | Laser shock processing method and device for liquid-state absorbing layer and liquid-state restraint layer |
| CN104141035A (en) * | 2014-08-26 | 2014-11-12 | 江苏大学 | Method and device for reinforcing hole wall by virtue of annular laser band impact |
| CN104141035B (en) * | 2014-08-26 | 2016-03-09 | 江苏大学 | A kind of method and apparatus of loop laser band shock peening hole wall |
| CN104475976A (en) * | 2014-11-19 | 2015-04-01 | 江苏大学 | Method and device for etching transparent insulating material by adopting magnetic powder induction type laser plasma |
| CN104475976B (en) * | 2014-11-19 | 2016-04-06 | 江苏大学 | The method and apparatus of magnetic induction type laser plasma etching insulation transparent material |
| CN105463179A (en) * | 2015-11-22 | 2016-04-06 | 沈阳黎明航空发动机(集团)有限责任公司 | Metal surface nanometer powder permeating method based on laser induction shock waves |
| EP3450577A1 (en) * | 2017-09-04 | 2019-03-06 | Toyota Jidosha Kabushiki Kaisha | Component manufacturing method and component |
| JP2019042775A (en) * | 2017-09-04 | 2019-03-22 | トヨタ自動車株式会社 | Method of manufacturing component, and component |
| US11408050B2 (en) | 2017-09-04 | 2022-08-09 | Toyota Jidosha Kabushiki Kaisha | Component manufacturing method and component |
| TWI658144B (en) * | 2018-03-07 | 2019-05-01 | National Taipei University Of Technology | System and method for strengthening a surface of a workpiece |
| CN111074061A (en) * | 2020-01-07 | 2020-04-28 | 山东大学 | Uniform surface strengthening method based on laser shock wave |
| CN111074061B (en) * | 2020-01-07 | 2021-07-23 | 山东大学 | Uniform surface strengthening method based on laser shock wave |
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