CN1131325C - Laser impact processor of Nd glass - Google Patents
Laser impact processor of Nd glass Download PDFInfo
- Publication number
- CN1131325C CN1131325C CN 00112122 CN00112122A CN1131325C CN 1131325 C CN1131325 C CN 1131325C CN 00112122 CN00112122 CN 00112122 CN 00112122 A CN00112122 A CN 00112122A CN 1131325 C CN1131325 C CN 1131325C
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- laser
- glass
- impact
- neodymium glass
- vibrator
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Abstract
The present invention relates to a laser application technique. The neodymium glass laser impact processor comprises a high power laser generating device composed of a Q-switching laser oscillator, a reflector, a phosphate neodymium glass laser amplifier and a Fresnel isolator, wherein the laser oscillator is a phosphate neodymium glass Q-switching laser oscillator superimposed with multiple transverse modes; a combined mobile joint light beam transmitter and a laser impact head are arranged on a light path output by the laser device. The neodymium glass laser impact processor has the advantages of compact structure, small volume, light weight, capability of moving the complete machine, safety and no pollution; a combined light beam transmitter and an integral laser impact head are used for carrying out laser impact processing to different positions of metal workpieces in a production field.
Description
Technical field
The present invention relates to laser application technique.
Background technology
It is the laser processing technology that a kind of new development is got up that laser-impact is handled (LSP).Its principle of work is to utilize high power laser light irradiation to metal material surface, produce the high-intensity plasma body of high-temperature high-density, thereby form high-intensity shock stress ripple, this shockwave affacts on metal works or the material surface, make its top layer that viscous deformation take place, to improve the anti-fatigue performance of metallic substance, increase the service life.In the existing neodymium glass device of high power laser, its laser oscillator is single transverse mode output, and it has the smaller advantage of the angle of divergence.But this laser oscillator output energy is very little, can not satisfy this application requiring, needs multistage amplification during use, makes its structure complicated.Therefore at present the overall volume that is used for the device of high power laser that LSP handles both at home and abroad is huge, complicated operation not only, and can only be fixed on a certain locality, and the direction of illumination of laser beam is fixed, and it is very inconvenient to use.On the other hand, glass slag splash phenomena everywhere can occur during owing to actually operating, also can't use in the production scene.
1999, a kind of laser impact processing method is disclosed among EP 0 964 067 A, in this method a light absorping film material movably is being set by ballistic metal works front, and regulate the thickness of control light absorping film material by means of detection and computer system, thereby reach control by the purpose of shock surface unrelieved stress size, make its surface residual stress be in comparatively uniform state.Not little in this method to existing generating device of laser energy, and make improvements to the defective that environment pollutes.
Summary of the invention
The objective of the invention is to,, provide a kind of complete machine of realizing to move, operate superpower nd glass laser shock peening device comparatively convenient, safety non-pollution at deficiency of the prior art.
Purpose of the present invention is realized by following mode.
Laser impact processor of Nd glass of the present invention, comprise by the Q-switch laser vibrator, space filtering and beam expander, speculum, the phosphoric acid salt neodymium glass laser amplifier, the high power laser light generating unit that the Fresnel shield retaining is formed, it is characterized in that, wherein employed neodymium glass Q-switch laser vibrator is the phosphoric acid salt neodymium glass Q-switch laser vibrator of many transverse mode stack outputs, and tipping has a combined live movable joint beam Propagation device and the laser-impact head that can make laser beam produce strong shock wave successively on the laser optical path that described high power laser light generating unit produces.Described combined live movable joint beam Propagation device is to be combined by the light guide bundles that turning joint light-conducting arm and multifiber constitute; Described laser-impact head can constitute like this: it comprises positive lens, the constraint sheet glass that is installed in two ends in the same cylindrical shell, this constraint sheet glass, positive lens are fixed by forward and backward lid respectively, on the surface of protecgulum inner face, scribble the luminous energy absorber coatings at the constraint sheet glass, the protecgulum middle part that contacts with the luminous energy absorber coatings is metal or nonmetallic thin layer, also can establish a glass baffle plate at the cylindrical shell middle part.
In the prior art, used Q-switch laser vibrator is the neodymium glass Q-switch laser vibrator of single transverse mode, the pulsed laser energy of its output only is the millijoule level, could actually use after must using multistage amplification and shield retaining, it is long that its overall light path can reach tens of rice, when carrying out the shock treatment operation, the glass slag that splashes everywhere is very easy hurts sb.'s feelings, and contaminate environment.Laser impact processor of Nd glass of the present invention, adopted the neodymium glass Q-switch laser vibrator of many transverse mode stack outputs, the pulsed laser energy of its output can reach a joule magnitude easily, it is very little to have overcome the neodymium glass Q-switch laser vibrator output energy that uses single transverse mode in the prior art, can not satisfy the shortcoming of application requiring.Therefore significantly reduced the amplifier that is used for amplified energy and the number of shield retaining in the total system, made it simple in structure, compact, dwindled the volume and weight of whole device effectively, also be convenient to debugging, operation and safeguard.Experiment shows that the physical dimension of this handler can be controlled in 2.2 (length) * 0.8 (wide) * 1.3 (height) the m scopes, about the about 250kg of weight, can move by complete machine, thereby can be advantageously used in the intensive treatment of metallic surface, and can use in the production scene.On the other hand, use simple optical fiber as the beam Propagation device in the prior art, through-put power is low, and this machine adopts the turning joint beam Propagation device that is combined by turning joint light-conducting arm and multifiber, can make the bigbore laser beam of superpower be transferred to arbitrary orientation effectively, very convenient.
The laser-impact head that the present invention uses on the outer surface of luminous energy absorber coatings attached to the constraint glass coating, has changed the way that in the prior art luminous energy absorber coatings directly is coated in workpiece surface.Not only help operation, also can not influence the place beyond the impact site for the treatment of of workpiece; And after coating absorbs laser, produce the plasma body blast and when forming shockwave, broken glass slag is closed in the inside of impact head cylindrical shell, and can not splash everywhere, guaranteeing personnel's on the scene personnel safety, and avoid contaminate environment.Therefore complete machine directly can be placed the production scene to use.
Laser-impact head of the present invention, can with the supporting use of high power laser light generating unit of the present invention, also can be used in the laser impact intensified treatment unit of prior art.
Description of drawings
Be further described below by embodiment and accompanying drawing thereof.
Fig. 1 is the complete machine structure synoptic diagram of laser impact processor of Nd glass of the present invention.
Fig. 2 is the structural representation of laser-impact head of the present invention.
Embodiment
Referring to Fig. 1, what express in its square frame is described superpower light laser generating unit, and its output rating is the gigawatt (GW) level, and pulsewidth is 10 nanosecond.Wherein, 1 is the phosphoric acid salt neodymium glass Q-switch laser vibrator of many transverse mode stack outputs, the laser beam that this vibrator produces by space filtering and beam expander 2 after, go into phosphoric acid salt neodymium glass laser amplifier 4 and Fresnel shield retaining 5 through 3 liang of secondary reflections of speculum are laggard, export by phosphoric acid salt neodymium glass amplifier 9 back again through speculum 6 then.7 are laser charging and triggering power supply, and 8 is electric-optically Q-switched power supply.This two power supply is connected with amplifier 9 with vibrator 1 respectively, and dotted line has been represented its annexation among the figure.In actual use, each parts connection in the above-described high power laser light generating unit, installation and debugging and prior art are similar.By contrast, this device has adopted the phosphoric acid salt neodymium glass Q-switch laser vibrator of many transverse mode stack outputs, the laser beam energy height of output.Because only use two-stage amplifier and a shield retaining in the whole high power laser light generating unit, overall volume is little, in light weight, therefore all parts can be assembled in the same casing, with convenient transportation and use.Tipping has a combined live movable joint beam Propagation device 10 and the laser-impact head 11 that can make laser beam focus on and produce strong shock wave successively on the laser optical path of described high power laser light generating unit output.During use, the output terminal of laser-impact head 11 is pressed close to need workpiece 12 surfaces of reinforcement.When emission during laser, the luminous energy absorber coatings in the laser-impact head generates the explosion wave that plasma body produced after receiving the radiation of laser, impacts the metal works surface, makes its top layer that viscous deformation take place, and reaches strengthening effect.Arrow among this figure is represented the direct of travel of laser beam.
Referring to Fig. 2,14 is positive lens.15 is cylindrical shell.13 are the fixing bonnet of positive lens, and its periphery is provided with outside screw and matches with internal thread on the cylindrical shell inner hole wall.16 is the glass baffle plate.17 is interior cover, and it plays the effect of fixing glass baffle plate 16, and this baffle plate glass fragment that forms that can prevent to explode flies to the positive lens place, avoids it contaminated.The other end of cover in constraint sheet glass 18 is arranged on, and have protecgulum 20 fixing.On the surface of protecgulum inner face, scribble luminous energy absorber coatings 19 at constraint sheet glass 18.From the laser beam of combined live movable joint beam Propagation device output through positive lens 14, glass baffle plate 16 and constraint sheet glass 18, irradiation is to luminous energy absorber coatings 19 places then, high power laser light makes this coating produce plasma body and blast forms shockwave, and the impact workpiece surface is finished and strengthened function.The middle portion of protecgulum is a thin layer, shockwave can be delivered on the workpiece surface.The described luminous energy absorber coatings that adheres on constraint sheet glass 18 can use the blackwash that can buy on the market, as pitch-dark, also can use other tailor-(made) coating.The thickness of coating is generally about 50 microns.Interface place at protecgulum and workpiece surface, protecgulum and absorber coatings also scribbles silicone oil, to eliminate the gap, helps improving the shockwave transmitance.
Claims (4)
1. laser impact processor of Nd glass, comprise the high power laser light generating unit of forming by neodymium glass Q-switch laser vibrator, space filtering and beam expander, speculum, phosphoric acid salt neodymium glass laser amplifier, Fresnel shield retaining, it is characterized in that, employed Q-switch laser vibrator is the phosphoric acid salt neodymium glass Q-switch laser vibrator of many transverse mode stack outputs, and tipping has a combined live movable joint beam Propagation device and the laser-impact head that can make laser beam produce strong shock wave successively on the laser optical path that described high power laser light generating unit produces.
2. laser impact processor of Nd glass as claimed in claim 1 is characterized in that, described combined live movable joint beam Propagation device is to be combined by the light guide bundles that turning joint light-conducting arm and multifiber constitute.
3. laser impact processor of Nd glass as claimed in claim 1, it is characterized in that described laser-impact head constitutes like this: it comprises positive lens and the constraint sheet glass that is installed in two ends in the same cylindrical shell, this constraint sheet glass, positive lens are fixed by forward and backward lid respectively, the constraint sheet glass on protecgulum inner face surperficial, scribble the luminous energy absorber coatings, be metal or nonmetallic thin layer in the middle part of the protecgulum that contact with the luminous energy absorber coatings.
4. laser impact processor of Nd glass as claimed in claim 3 is characterized in that the cylindrical shell middle part of described laser-impact head is provided with a glass baffle plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00112122 CN1131325C (en) | 2000-03-10 | 2000-03-10 | Laser impact processor of Nd glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00112122 CN1131325C (en) | 2000-03-10 | 2000-03-10 | Laser impact processor of Nd glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1313164A CN1313164A (en) | 2001-09-19 |
| CN1131325C true CN1131325C (en) | 2003-12-17 |
Family
ID=4582006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00112122 Expired - Fee Related CN1131325C (en) | 2000-03-10 | 2000-03-10 | Laser impact processor of Nd glass |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1131325C (en) |
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2000
- 2000-03-10 CN CN 00112122 patent/CN1131325C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1313164A (en) | 2001-09-19 |
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