CN111826514A - Light-water coaxial laser shock peening device - Google Patents
Light-water coaxial laser shock peening device Download PDFInfo
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- CN111826514A CN111826514A CN201910321632.0A CN201910321632A CN111826514A CN 111826514 A CN111826514 A CN 111826514A CN 201910321632 A CN201910321632 A CN 201910321632A CN 111826514 A CN111826514 A CN 111826514A
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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 relates to the field of laser shock peening, in particular to a laser shock peening device with coaxial light and water, which comprises a shell, a laser focusing lens, a laser window and a nozzle, wherein a hydraulic balance cavity is arranged in the shell, one side of the hydraulic balance cavity is provided with the laser window, the other side of the hydraulic balance cavity is provided with the nozzle, the shell is provided with a port communicated with the hydraulic balance cavity, the laser focusing lens is arranged in the shell and is arranged on the outer side of the laser window, laser is injected from an opening at the rear end of the shell and sequentially penetrates through the laser focusing lens, the laser window and liquid in the hydraulic balance cavity to irradiate in the nozzle, a jet opening is arranged on the shell on the outer side of the nozzle, the liquid forms jet flow after passing through the nozzle and is sprayed out from the jet opening, and the laser enters the jet flow and. The invention effectively solves the problem that the existing laser shock strengthening device is difficult to be applied to the shock strengthening of the inner surface of a narrow space or a semi-closed space.
Description
Technical Field
The invention relates to the field of laser shock peening processing, in particular to a laser shock peening device with coaxial light and water.
Background
The laser shock peening technology has been widely applied to surface property strengthening treatment of various metal material structural members. The laser shock peening technology generally adopts water or mineral oil as a constrained layer to limit the diffusion of plasma generated by laser, so as to form effective shock waves to strengthen workpiece materials. Therefore, in the existing laser shock peening apparatuses, a water jet nozzle needs to be placed near the workpiece to form a constrained layer on the surface of the workpiece. However, when laser shock peening is performed on a surface in a narrow or semi-closed space, the water jet nozzle often has insufficient space for placing, which greatly limits the application range of the laser shock peening technology.
The invention patent No. 200510094810.9 discloses a method and a device for pressurizing a novel water restraint layer based on a laser shock strengthening technology, which provides a laser shock method and a device based on a flowing water restraint layer with uniform thickness, the invention patent No. 201410492392.8 discloses a method and a device for restraining the pressure of a laser shock wave based on air laminar flow, the pressure of the laser shock wave is restrained by the air laminar flow formed by temperature difference, a good restraining effect can be realized under the air pressure of 0.7-2.5 MPa, the above patents all have the problem that a restraining layer spray head occupies a narrow processing space, the invention patent No. 201810967909.2 discloses a method for using liquid nitrogen as a restraining layer in the laser shock strengthening method, the surface shock strengthening of materials is realized under low temperature environment, but when static liquid nitrogen is used as the restraining layer of a complex curved surface part, uneven thickness of the constraining layer also affects the stability of impact reinforcement, so that the laser impact finishing effect is not ideal.
Disclosure of Invention
The invention aims to provide a light-water coaxial laser shock peening device to solve the problem that the existing laser shock peening device is difficult to be applied to narrow space or semi-closed space to achieve surface shock peening.
The purpose of the invention is realized by the following technical scheme:
a laser shock strengthening device with coaxial light and water comprises a shell, a laser focusing lens, a laser window and a nozzle, wherein a hydraulic balance cavity is arranged in the shell, a laser window is arranged on one side of the hydraulic balance cavity, the nozzle is arranged on the other side of the hydraulic balance cavity, a connector is arranged on the shell and communicated with the hydraulic balance cavity, the laser focusing lens is arranged in the shell and is arranged on the outer side of the laser window, laser is injected from an opening at the rear end of the shell and sequentially penetrates through the laser focusing lens, the laser window and liquid in the hydraulic balance cavity to irradiate in the nozzle, a jet orifice is arranged on the shell on the outer side of the nozzle, liquid forms jet flow after passing through the nozzle, the jet flow is sprayed out from the jet orifice to the surface of a workpiece to be machined, and the laser enters the jet.
The laser light is totally reflected within the jet and propagates coaxially with the jet.
The focal position of the laser focusing lens is positioned in the nozzle.
The nozzle is internally provided with a pore passage for spraying water.
The cross section of the pore canal is in a round shape, a rectangular shape or a round corner rectangular shape.
The nozzle is made of wear-resistant metal materials, and the pore diameter range of a pore passage of the nozzle is 0.5-8 mm.
The range of the hydraulic value in the hydraulic balance cavity is 0.1-10 MPa.
And sealing parts are arranged between the laser window and the shell and between the nozzle and the shell.
The invention has the advantages and positive effects that:
1. the laser shock peening device enables laser to be coupled into jet flow and to be propagated together with the jet flow, saves the space which is occupied by a water spraying head in the traditional laser shock peening equipment independently, can greatly reduce the volume of the laser shock peening head, and greatly improves the surface strengthening capability of the laser shock peening equipment on narrow and semi-closed space.
2. The laser beam is converged in the nozzle through the laser focusing lens, the converged laser beam is totally reflected inside a jet flow sprayed out of the nozzle and is transmitted to the surface of a workpiece, the shape and the area of the workpiece which can be strengthened in one laser pulse are the same as the section of the jet flow, and the corresponding nozzle pore channel shape can be selected according to the processing requirement.
Drawings
Figure 1 is a schematic structural view of the present invention,
figure 2 is a schematic view of a nozzle arrangement according to the invention,
figure 3 is a schematic view of another nozzle configuration useful in the present invention,
FIG. 4 is a schematic view of another nozzle configuration useful in the present invention.
The laser balance device comprises a shell 1, a groove 101, a laser 2, a laser focusing lens 3, a laser window 4, a hydraulic balance cavity 5, a nozzle 6, a pore channel 601, a jet flow 7, an interface 8 and a jet opening 9.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the present invention includes a housing 1, a laser focusing lens 3, a laser window 4 and a nozzle 6, a hydraulic equilibrium chamber 5 is arranged in the housing 1, and one side of the hydraulic equilibrium chamber 5 is provided with the laser window 4, and the other side is provided with the nozzle 6, the laser focusing lens 3 is arranged in the housing 1 and is arranged outside the laser window 4, the rear end of the housing 1 is provided with an opening, and the laser 2 emitted by the pulse laser is injected from the opening at the rear end of the housing 1 and then sequentially passes through the laser focusing lens 3, the laser window 4 and the liquid in the hydraulic equilibrium chamber 5 and irradiates in the nozzle 6, the housing 1 is provided with an interface 8 communicated with the hydraulic equilibrium chamber 5, the housing 1 outside the nozzle 6 is provided with an ejection port 9, the pressure liquid enters the hydraulic equilibrium chamber 5 through the interface 8 and forms an ejection flow 7 through the nozzle 6 and then passes through the ejection port 9 to be ejected, the laser light 2 impinging in the nozzle 6 is totally reflected in the jet 7 and propagates in the direction of the jet 7. In this embodiment, the pressure liquid is water, and the pulse laser is a commercially available product.
As shown in fig. 1, the laser focusing lens 3 is used for focusing the collimated laser 2 emitted by the pulse laser, and the focal position is located in the nozzle 6, a groove 101 is provided at the rear end of the housing 1, the laser focusing lens 3 is embedded in the groove 101, and the position can be finely adjusted in the groove 101 along the advancing direction of the laser 2, so as to ensure that the laser 2 can be focused into the nozzle 6, and the laser focusing lens 3 can be a single lens or a lens group according to actual needs.
As shown in fig. 1, the laser window 4 is used to isolate pressure fluid in the hydraulic equalizing chamber 5, and a first sealing member is provided between the laser window 4 and the housing 1 to ensure sealing, and in this embodiment, the first sealing member is a sealing ring.
As shown in fig. 1, a hydraulic balance cavity 5 is arranged between a laser window 4 and a nozzle 6, pressure liquid enters the hydraulic balance cavity 5 from a reserved interface 8 on a shell 1 and realizes hydraulic stability, the nozzle 6 is a structure for realizing liquid ejection, and a second sealing element is arranged between the nozzle 6 and the shell 1 to ensure sealing. In this embodiment, the second sealing element is a sealing ring.
As shown in fig. 2 to 4, the middle of the nozzle 6 is provided with a pore channel 601, liquid in the hydraulic equalizing chamber 5 is ejected from the pore channel 601, the pore channel 601 of the nozzle 6 can adopt structures of different shapes according to actual needs, the nozzle 6 shown in fig. 2 can generate jet flow 7 with a circular cross section, after the laser 2 is coupled, the inside of the jet flow 7 can realize relatively uniform laser distribution, after the jet flow 7 containing the laser 2 is jetted to the surface of a workpiece, laser shock strengthening can be performed on the circular area on the workpiece, the nozzle 6 shown in fig. 3 can generate jet flow 7 with a rectangular cross section, the nozzle 6 shown in fig. 4 can generate jet flow 7 with a rectangular cross section at a rounded corner, and laser shock strengthening can be performed on the rectangular area and the rectangular area at a rounded corner on the workpiece respectively.
In the embodiment, the range of the hydraulic value in the hydraulic balance cavity 5 is 0.1-10 MPa, the nozzle 6 is made of a wear-resistant metal material, and the pore diameter range of the pore channel 601 of the nozzle 6 is 0.5-8 mm.
The working principle of the invention is as follows:
when the laser shock peening device works, pressure liquid enters the hydraulic equalizing cavity 5 through the interface 8 on the shell 1 and passes through the nozzle 6 to form a jet flow 7 to penetrate through the jet flow port 9 to be jetted, laser 2 emitted by a pulse laser enters from the rear end opening of the shell 1 and then passes through the laser focusing lens 3, then sequentially passes through the laser window 4 and liquid in the hydraulic equalizing cavity 5 to be focused in the nozzle 6, total reflection occurs in the jet flow 7, the jet flow 7 is aligned to a workpiece needing to be strengthened, and the laser 2 and the jet flow 7 reach the surface of the workpiece in a coaxial state to finish laser shock strengthening work. The laser 2 is a pulse laser beam, the hydraulic pressure in the hydraulic pressure equalizing cavity 5 needs to be kept stable, and the jet flow sprayed by the nozzle 6 needs to be kept stable.
Claims (8)
1. The coaxial laser shock peening device of light water which characterized in that: the laser machining device comprises a shell (1), a laser focusing lens (3), a laser window (4) and a nozzle (6), wherein a hydraulic balance cavity (5) is arranged in the shell (1), the laser window (4) is arranged on one side of the hydraulic balance cavity (5), the nozzle (6) is arranged on the other side of the hydraulic balance cavity, a connector (8) is arranged on the shell (1) and communicated with the hydraulic balance cavity (5), the laser focusing lens (3) is arranged in the shell (1) and arranged on the outer side of the laser window (4), laser (2) is injected from an opening at the rear end of the shell (1) and sequentially penetrates through the laser focusing lens (3), the laser window (4) and liquid in the hydraulic balance cavity (5) to irradiate in the nozzle (6), a jet opening (9) is arranged on the shell (1) on the outer side of the nozzle (6), and the liquid forms a jet flow (7) after passing through the nozzle (6) and is ejected to the surface of a workpiece to be machined by the jet opening (, the laser (2) enters the jet (7) and propagates in the direction of the jet (7).
2. The laser shock peening apparatus with coaxial light and water according to claim 1, wherein: the laser (2) is totally reflected in the jet (7) and propagates coaxially with the jet (7).
3. The laser shock peening apparatus with coaxial light and water according to claim 1, wherein: the focal point position of the laser focusing lens (3) is positioned in the nozzle (6).
4. The device for laser shock peening according to claim 1 or 3, wherein: the nozzle (6) is internally provided with a pore channel (601) for spraying water.
5. The device for laser shock peening of optical-water coaxial according to claim 4, wherein: the cross section of the pore channel (601) is round, rectangular or rounded rectangle.
6. The device for laser shock peening of optical-water coaxial according to claim 4, wherein: the nozzle (6) is made of wear-resistant metal materials, and the pore diameter range of a pore channel (601) of the nozzle (6) is 0.5-8 mm.
7. The laser shock peening apparatus with coaxial light and water according to claim 1, wherein: the hydraulic value range in the hydraulic balance cavity (5) is 0.1-10 MPa.
8. The laser shock peening apparatus with coaxial light and water according to claim 1, wherein: sealing elements are arranged between the laser window (4) and the shell (1) and between the nozzle (6) and the shell (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910321632.0A CN111826514B (en) | 2019-04-22 | 2019-04-22 | Light-water coaxial laser shock peening device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910321632.0A CN111826514B (en) | 2019-04-22 | 2019-04-22 | Light-water coaxial laser shock peening device |
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| CN111826514A true CN111826514A (en) | 2020-10-27 |
| CN111826514B CN111826514B (en) | 2022-02-11 |
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| CN201910321632.0A Active CN111826514B (en) | 2019-04-22 | 2019-04-22 | Light-water coaxial laser shock peening device |
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Citations (8)
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| CN101787528A (en) * | 2010-02-09 | 2010-07-28 | 江苏大学 | Nano coating preparation method and device based on ultrafast ultrahigh pressure photodynamics effect |
| CN102465195A (en) * | 2010-11-16 | 2012-05-23 | 杭州中科新松光电有限公司 | Light-water coaxial laser shock peening head |
| CN102500928A (en) * | 2011-10-31 | 2012-06-20 | 重庆长安汽车股份有限公司 | Micro-water-column guiding laser micromachining device |
| CN102925646A (en) * | 2012-11-14 | 2013-02-13 | 江苏大学 | Method and device of shot peening for surface of metal component by means of light-water complex |
| CN103212819A (en) * | 2012-01-19 | 2013-07-24 | 昆山思拓机器有限公司 | Coaxial water jet device used for laser micro machining of thin-walled tube |
| US20160237521A1 (en) * | 2013-10-31 | 2016-08-18 | Ningbo Institute Of Materials Technology & Engineering, Chinese Academy Of Sciences | Laser Shock Peening Apparatus for Surface of Workpiece, and Laser Shock Peening Method |
| CN206747784U (en) * | 2016-12-30 | 2017-12-15 | 宁波大艾激光科技有限公司 | A kind of laser impact intensified processing unit of trailing type |
| CN107695514A (en) * | 2017-09-20 | 2018-02-16 | 华中科技大学 | The coupling head and underwater laser processing unit (plant) of a kind of laser air water coaxial jet |
-
2019
- 2019-04-22 CN CN201910321632.0A patent/CN111826514B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101787528A (en) * | 2010-02-09 | 2010-07-28 | 江苏大学 | Nano coating preparation method and device based on ultrafast ultrahigh pressure photodynamics effect |
| CN102465195A (en) * | 2010-11-16 | 2012-05-23 | 杭州中科新松光电有限公司 | Light-water coaxial laser shock peening head |
| CN102500928A (en) * | 2011-10-31 | 2012-06-20 | 重庆长安汽车股份有限公司 | Micro-water-column guiding laser micromachining device |
| CN103212819A (en) * | 2012-01-19 | 2013-07-24 | 昆山思拓机器有限公司 | Coaxial water jet device used for laser micro machining of thin-walled tube |
| CN102925646A (en) * | 2012-11-14 | 2013-02-13 | 江苏大学 | Method and device of shot peening for surface of metal component by means of light-water complex |
| US20160237521A1 (en) * | 2013-10-31 | 2016-08-18 | Ningbo Institute Of Materials Technology & Engineering, Chinese Academy Of Sciences | Laser Shock Peening Apparatus for Surface of Workpiece, and Laser Shock Peening Method |
| CN206747784U (en) * | 2016-12-30 | 2017-12-15 | 宁波大艾激光科技有限公司 | A kind of laser impact intensified processing unit of trailing type |
| CN107695514A (en) * | 2017-09-20 | 2018-02-16 | 华中科技大学 | The coupling head and underwater laser processing unit (plant) of a kind of laser air water coaxial jet |
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| CN111826514B (en) | 2022-02-11 |
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