CN103710493A - Laser shock processing method and device for liquid-state absorbing layer and liquid-state restraint layer - Google Patents
Laser shock processing method and device for liquid-state absorbing layer and liquid-state restraint layer Download PDFInfo
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- CN103710493A CN103710493A CN201310719015.9A CN201310719015A CN103710493A CN 103710493 A CN103710493 A CN 103710493A CN 201310719015 A CN201310719015 A CN 201310719015A CN 103710493 A CN103710493 A CN 103710493A
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Abstract
The invention relates to a laser shock processing method. According to the laser shock processing method, a turbid liquid is taken as the material of a liquid-state absorbing layer, another liquid-state material immiscible with the material of the liquid-state absorbing layer is taken as a restraint layer, and different portions of the inner wall of a workpiece are impacted by adjusting interface positions of the restraint layer and the absorbing layer. A device for implementing the laser shock processing method comprises a laser generator, the liquid-state restraint layer, a cushion block, a support block, a water tank, a seal ring, an ejector rob, a workbench, a bracket, a workbench control device, the liquid-state absorbing layer, a computer and a laser generator control device, wherein the workpiece is mounted on the support block through the cushion block, and the support block is arranged in the water tank and is connected to the workbench; the ejector rob is mounted on the workbench through an opening formed in the lower part of the water tank; the water tank is mounted on the ground through the bracket, and the opening is formed in the lower part of the water tank; the workbench is connected with the workbench control device, and the workbench control device is connected with the computer; the laser generator is connected with the laser generator control device, and the laser generator control device is connected with the computer.
Description
Affiliated technical field:
The present invention relates to field of laser processing, refer in particular to a kind of laser processing method and device based on laser shock wave technology, be particularly useful for the shock treatment of part inwall.
Background technology:
It is to utilize intense laser beam irradiation workpiece surface that laser-impact is processed, gasification after workpiece surface absorbed laser energy, ionization produce explosion wave, shockwave is propagated to inside workpiece, make the laser irradiated surface of workpiece produce microplasticity distortion, laser-impact processing finishes rear workpiece laser irradiation face and forms one deck residual compressive stress layer, can improve the wear resistance of workpiece surface and the fatigue lifetime of prolongation workpiece.
Impact for fear of the ablation of workpiece surface Stimulated Light; the workpiece surface spraying one deck of being everlasting in practical laser shock treatment process is pitch-dark as absorption layer material; on the one hand; the laser absorption rate of absorption layer material is higher; can improve laser-impact effect, on the other hand, direct ablation absorption layer material rather than workpiece surface material during laser irradiation; absorption layer can also completely cut off the heat affecting of laser irradiation to workpiece surface simultaneously, plays the effect of protection workpiece.
Existing laser impact intensified treatment technology can only be processed outer surface of workpiece, shock treatment for workpiece inwall must make workpiece rotate to an angle or laser head is rotated to an angle, so that laser beam can irradiation to inwall, at this moment laser beam and processed surperficial non-vertical, laser energy disperses, impact effect is poor, is difficult to the impact effect that reaches satisfied.
Summary of the invention:
The laser impact processing method and the device that the object of this invention is to provide the liquid restraint layer of a kind of liquid absorption layer, the shock peening that is particularly useful for deep-hole parts hole wall is processed.
Technical scheme; Principle is to adopt suspension liquid as liquid absorption layer material, and use and the immiscible another kind of liquid material of liquid absorption layer material are as restraint layer, make it be full of inside workpiece cavity, then use the liquid absorption layer material of laser beam irradiation, after solid granulates absorbing laser energy in liquid absorption layer material, generating gasification, ionization produce shockwave, shockwave drives absorption layer liquid diffusion couple workpiece inwall to impact, make the distortion of inner wall surface generation microplasticity form stress, thereby inner hole of workpiece wall is strengthened.In this process, liquid restraint layer makes to impact that intensity of wave is improved, pulse width is extended, thereby improves impact effect.
Implementing the laser-impact of the liquid restraint layer of a kind of liquid absorption layer of the present invention processes, comprise laser generator, liquid restraint layer, cushion block, supporting plate, tank, sealing-ring, push rod, worktable, support, Worktable control device, liquid absorption layer, computer and laser generator control device, push rod is set above worktable, push rod passes the hole of bottom of gullet and stretches into tank inside, bottom of gullet is provided with sealing-ring in hole, and sealing-ring is connected with push rod.Push rod and the tank hole non-leakage solution of combining closely, above push rod in tank, supporting plate is set, cushion block is placed in the left and right sides, supporting plate top, on cushion block, place and need workpiece to be processed, bottom in tank is poured liquid absorption layer into, its liquid level is a little less than the upper surface of workpiece, on liquid absorption layer, pour the transparent liquid restraint layer that proportion is lighter than liquid absorption layer into, its liquid level is higher than the upper surface of workpiece, liquid absorption layer and liquid restraint layer are immiscible, tank is installed on the ground by support, Worktable control device is connected with worktable and computer, computer also connects laser generator control device, laser generator control device is connected with laser generator.
The laser-impact treatment unit of the liquid restraint layer of described a kind of liquid absorption layer, liquid absorption layer is wherein that the suspension liquid that contains black solid subparticle is as pitch-dark in prepared Chinese ink, liquid state, wherein solids is as laser energy absorption thing, for absorbing laser energy;
Described liquid restraint layer is the transparent liquid immiscible with liquid absorption layer, if absorption layer is the suspension liquid that water and other solid materials form, restraint layer can adopt mineral oil, if absorption layer adopts the oils materials such as black paint, restraint layer can adopt the various aqueous solution.
Implementation process of the present invention is as follows:
1. workpiece is arranged on supporting plate, and in tank, pours absorption layer liquid, the liquid level of absorption layer liquid is a little less than workpiece surface;
2. in tank, add restraint layer liquid, restraint layer liquid depth is about 3～8mm;
3. adjust operating position, make the center superposition in laser beam spot center and pending hole;
4. computer sends instruction to laser generator control device, and laser generator control device is controlled laser generator and sent laser pulse by the laser parameter of command request;
5. laser beam arrives liquid absorption layer material through liquid restraint layer irradiation, in liquid absorption layer material, gasification after laser energy absorption material absorbing laser energy, ionization are blasted, produce shockwave, restraint layer stops absorption layer vapour directly in atmosphere, to spread, thereby make to impact intensity of wave and increased, pulse width is extended;
6. explosion wave is propagated to workpiece inwall by absorption layer liquid and restraint layer liquid, makes workpiece inner-wall material that local microplasticity distortion occur, and forms the compressive stress layer of certain depth, thereby increases the wear resisting property of work piece inner surface and extend fatigue lifetime;
7. computer sends instruction and to another, needs the position in the hole of shock treatment to Worktable control device control movable workbench, then sends instruction, to laser generator control device control laser generator output laser pulse, laser-impact processing is carried out in another hole.
8. after porose inwall has all impacted once, computer export instruction is controlled worktable rising certain altitude to Worktable control device, worktable gets up workpiece jacking by push rod, supporting plate, cushion block, in inner hole of workpiece, absorption layer and constraint position, bed interface decline certain altitude, as shown in Figure 2,3;
9. repeat 4～8 step, the hole wall of the next depth location of inside workpiece is carried out to shock peening processing;
10. repeat 4～9 step, until whole workpiece inwall all shock treatment complete.
Beneficial effect: implement laser-impact of the present invention and process, by liquid absorption layer and liquid restraint layer, transmit shockwave, and by lifting workpieces position, restraint layer and absorption layer interface location are declined, can carry out shock treatment to the inwall of workpiece different depth position, need not workpiece Sloped rotating or laser head Sloped rotating, and can to workpiece inner wall laser cannot irradiation to position carry out shock treatment.
Accompanying drawing explanation:
Below in conjunction with Fig. 1, the invention will be further described:
Fig. 1 laser-impact structure drawing of device
Fig. 2 original liquid interface location schematic diagram
Fig. 3 liquid interface position decline schematic diagram
1. the laser generator 2. laser beam liquid restraint layer of 3. workpiece 4. 5. cushion block 6. supporting plate 7. tank 8. sealing-ring 9. push rod 10. worktable 11. support 12. Worktable control device 13. computer liquid absorption layer 16. absorption layers of 14. laser generator control device 15. and restraint layer interfaces
Embodiment:
Below in conjunction with accompanying drawing, describe details and the working condition of the concrete device of the present invention's proposition in detail.
As shown in Figure 1, the laser-impact of the liquid restraint layer of a kind of liquid absorption layer is processed, comprise laser generator 1, liquid restraint layer 4, cushion block 5, supporting plate 6, tank 7, sealing-ring 8, push rod 9, worktable 10, support 11, Worktable control device 12, liquid absorption layer 15, computer 13 and laser generator control device 14, worktable 10 arranges push rod 9 above, push rod 9 passes the hole of tank 7 bottoms and stretches into tank 7 inside, push rod 9 and the tank 7 holes non-leakage solution of combining closely, above push rod 9 in tank 7, supporting plate 6 is set, cushion block 5 is placed in supporting plate 6 left and right sides, top, on cushion block 5, place and need workpiece 3 to be processed, bottom in tank 7 is poured liquid absorption layer 15 into, its liquid level is a little less than the upper surface of workpiece 3, on liquid absorption layer 15, pour the transparent liquid restraint layer 4 that proportion is lighter than liquid absorption layer into, its liquid level is higher than the upper surface of workpiece 3, liquid absorption layer 15 is immiscible with liquid restraint layer 4, tank 7 is installed on the ground by support 11, Worktable control device 12 is connected with worktable 10 and computer 13, computer 13 also connects laser generator control device 14, laser generator control device 14 is connected with laser generator 1.
In tank 7 base apertures, be provided with sealing-ring 8, sealing-ring 8 is connected with push rod 9.
The laser-impact treatment unit of the liquid restraint layer of described a kind of liquid absorption layer, liquid absorption layer 15 is wherein as pitch-dark in prepared Chinese ink, liquid state for the suspension liquid that contains black solid subparticle, and wherein solids is as laser energy absorption thing, for absorbing laser energy;
Described liquid restraint layer 4 is the transparent liquid immiscible with liquid absorption layer 15, if absorption layer 15 is the suspension liquid that water and other solid materials form, restraint layer 4 can adopt mineral oil, if absorption layer 15 adopts the oils materials such as black paint, restraint layer 4 can adopt the various aqueous solution.
Implementation process of the present invention is as follows:
1. workpiece 3 is arranged on supporting plate 6, and adds absorption layer liquid 15 in tank 7, the liquid level of absorption layer liquid 15 is a little less than the upper surface of workpiece 3;
2. in tank 7, add restraint layer liquid 4, the degree of depth of restraint layer liquid 4 is about 3～8mm;
3. adjust the position of worktable 10, make the center superposition in laser beam spot center and pending hole;
4. computer 13 sends instruction to laser generator control device 14, and laser generator control device 14 is controlled laser generator 1 and sent laser pulse by the laser parameter of command request;
5. laser beam 2 arrives liquid absorption layer material 15 through liquid restraint layer 4 irradiation, in liquid absorption layer material 15, gasification after laser energy absorption material absorbing laser energy, ionization are blasted, produce shockwave, restraint layer 4 stops absorption layer vapour directly in atmosphere, to spread, thereby make to impact intensity of wave and increased, pulse width is extended;
6. explosion wave is propagated to workpiece 3 inwalls by absorption layer liquid 15 and restraint layer liquid 4, makes workpiece 3 inner-wall materials that local microplasticity distortion occur, and forms the compressive stress layer of certain depth, thereby increases the wear resisting property of workpiece 3 internal surfaces and extend fatigue lifetime;
7. computer 13 sends instruction and moves to Worktable control device 12 control worktable 10 position that another needs the hole of shock treatment, then sends instruction, to laser generator control device 14 control laser generator 1 output laser pulses, laser-impact processing is carried out in another hole.
8. after porose inwall has all impacted once, computer 13 output orders are controlled worktable 10 rising certain altitudes to Worktable control device 12, worktable 10 gets up workpiece 3 jackings by push rod 9, supporting plate 6, cushion block 5, in workpiece 3 endoporus, the position decline certain altitude at the interface 16 of absorption layer 15 and restraint layer 4, as shown in Figure 2,3;
9. repeat 4～8 step, the hole wall of the next depth location of inside workpiece is carried out to shock peening processing;
10. repeat 4～9 step, until whole workpiece 3 inwalls all shock treatment complete.
Claims (7)
1. the laser-impact treatment unit of the liquid restraint layer of liquid absorption layer, comprise laser generator (1), liquid restraint layer (4), cushion block (5), supporting plate (6), tank (7), sealing-ring (8), push rod (9), worktable (10), support (11), Worktable control device (12), liquid absorption layer (15), computer (13) and laser generator control device (14), worktable (10) arranges push rod (9) above, push rod (9) passes the hole of tank (7) bottom and stretches into tank (7) inside, push rod (9) and tank (7) the hole non-leakage solution of combining closely, push rod (9) top in tank (7) arranges supporting plate (6), cushion block (5) is placed in the left and right sides, supporting plate (6) top, the upper placement of cushion block (5) needs workpiece to be processed (3), bottom in tank (7) is poured liquid absorption layer (15) into, its liquid level is a little less than the upper surface of workpiece (3), on liquid absorption layer (15), pour the transparent liquid restraint layer (4) that proportion is lighter than liquid absorption layer (15) into, its liquid level is higher than the upper surface of workpiece (3), liquid absorption layer (15) is immiscible with liquid restraint layer (4), tank (7) is installed on the ground by support (11), Worktable control device (12) is connected with worktable (10) and computer (13), computer (13) also connects laser generator control device (14), laser generator control device (14) is connected with laser generator (1).
2. the laser-impact of the liquid restraint layer of liquid absorption layer according to claim 1 is processed, and it is characterized in that, in tank (7) base apertures, be provided with sealing-ring (8), sealing-ring (8) is connected with push rod (9).
3. the laser-impact of the liquid restraint layer of liquid absorption layer according to claim 1 and 2 is processed, and it is characterized in that the suspension liquid of liquid absorption layer (15) for containing black solid subparticle.
4. the laser-impact of the liquid restraint layer of liquid absorption layer according to claim 1 and 2 is processed, and it is characterized in that, absorption layer (15) is the suspension liquid that water and other solid materials form, and restraint layer (4) is mineral oil.
5. the laser-impact of the liquid restraint layer of liquid absorption layer according to claim 1 and 2 is processed, and it is characterized in that, absorption layer (15) is black oils, and restraint layer (4) is the various aqueous solution.
6. the laser impact processing method of the liquid restraint layer of liquid absorption layer, it is characterized in that, with the laser-impact of the liquid restraint layer of liquid absorption layer of claim 1 to 5 any one, process to realize, by adjusting the position of two kinds of liquid surfaces, realize the shock treatment to workpiece inwall different sites.
7. the laser impact processing method of the liquid restraint layer of liquid absorption layer according to claim 6, is characterized in that, detailed process is as follows:
(1) workpiece (3) is arranged on to supporting plate (6) above, and in tank (7), adds absorption layer liquid (15), the liquid level of absorption layer liquid (15) is a little less than the upper surface of workpiece (3);
(2) in tank (7), add restraint layer liquid (4), the degree of depth of restraint layer liquid (4) is 3～8mm;
(3) adjust the position of worktable (10), make the center superposition in laser beam spot center and pending hole;
(4) computer (13) sends instruction to laser generator control device (14), and laser generator control device (14) is controlled laser generator (1) and sent laser pulse by the laser parameter of command request;
(5) laser beam (2) arrives liquid absorption layer material (15) through liquid restraint layer (4) irradiation, in liquid absorption layer material (15), after laser energy absorption material absorbing laser energy, gasification, ionization are blasted, produce shockwave, restraint layer (4) stops absorption layer vapour directly in atmosphere, to spread, thereby make to impact intensity of wave and increased, pulse width is extended;
(6) explosion wave is propagated to workpiece (3) inwall by absorption layer liquid (15) and restraint layer liquid (4), make workpiece (3) inner-wall material that local microplasticity distortion occur, form the compressive stress layer of certain depth, thereby increase the wear resisting property of workpiece (3) internal surface and extend fatigue lifetime;
(7) computer (13) sends instruction and moves to Worktable control device (12) control worktable (10) position that another needs the hole of shock treatment, then sends instruction, to laser generator control device (14) control laser generator 1 output laser pulse, laser-impact processing is carried out in another hole.
(8) after porose inwall has all impacted once, computer (13) output order is controlled worktable (10) rising certain altitude to Worktable control device (12), worktable (10) gets up workpiece (3) jacking by push rod (9), supporting plate (6), cushion block (5), in workpiece (3) endoporus, the position decline certain altitude at the interface (16) of absorption layer (15) and restraint layer (4);
(9) repeat the step of (4)～(8), the hole wall of the next depth location of inside workpiece is carried out to shock peening processing;
(10) repeat the step of (4)～(9), until whole workpiece (3) inwall all shock treatment complete.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310719015.9A CN103710493B (en) | 2013-12-23 | 2013-12-23 | The laser impact processing method of the liquid restraint layer of a kind of liquid absorbent layer and device |
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| CN201310719015.9A CN103710493B (en) | 2013-12-23 | 2013-12-23 | The laser impact processing method of the liquid restraint layer of a kind of liquid absorbent layer and device |
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Cited By (7)
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| CN106636607A (en) * | 2017-01-03 | 2017-05-10 | 中国矿业大学 | Controllable constrained laser micro shot peening intensification device and method thereof |
| CN107552947A (en) * | 2017-07-31 | 2018-01-09 | 江苏大学 | Laser-impact micro-forming device and its method based on hydraulic oil |
| CN110144452A (en) * | 2019-04-12 | 2019-08-20 | 江苏大学 | Multiple constraint layer booster-type inhibits laser impact intensified sheet deformation device and method |
| CN110315078A (en) * | 2019-07-30 | 2019-10-11 | 华中科技大学 | A kind of multi-functional selective laser fusing former |
| CN110607432A (en) * | 2019-09-19 | 2019-12-24 | 江苏大学 | Laser shock peening boundary effect control method |
| CN111893254A (en) * | 2020-08-11 | 2020-11-06 | 江苏智远激光装备科技有限公司 | Laser inner hole quenching device |
| CN113122702A (en) * | 2021-03-25 | 2021-07-16 | 山东大学 | Double-physical-effect pulse laser impact method based on physical properties of variable liquid restraint layer |
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| CN113122702A (en) * | 2021-03-25 | 2021-07-16 | 山东大学 | Double-physical-effect pulse laser impact method based on physical properties of variable liquid restraint layer |
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