CN106048144A - Method for regulating and controlling laser shock shot-blasting stress of laser additive thin-walled part - Google Patents
Method for regulating and controlling laser shock shot-blasting stress of laser additive thin-walled part Download PDFInfo
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- CN106048144A CN106048144A CN201610599791.3A CN201610599791A CN106048144A CN 106048144 A CN106048144 A CN 106048144A CN 201610599791 A CN201610599791 A CN 201610599791A CN 106048144 A CN106048144 A CN 106048144A
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/06—Surface hardening
- C21D1/09—Surface hardening by direct application of electrical or wave energy; by particle radiation
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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
- C21D11/00—Process control or regulation for heat treatments
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- Organic Chemistry (AREA)
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Abstract
The invention discloses a method for regulating and controlling the laser shot-blasting stress of a laser additive thin-walled part and relates to the field of laser additive manufacturing stress regulation and control. The method comprises the following steps of firstly, based on different laser additive manufacturing parameters, obtaining thermally-induced stress distribution, generated after laser additive manufacturing, of the material surface through analog; secondly, conducting analog computation on deformation caused by residual stress release generated after the material surface is processed, cut and peeled and deformation applied by tools, and computing stress distribution generated after processing; subsequently, creating a laser shock scheme according to stress distribution and the deformation conditions of different areas, and correcting positional deviation X and angular deviation theta of each deformed area through laser shock formation in the first place; and finally, computing residual stress distribution of the surface of a test specimen obtained after laser shock shape correction, and regulating residual stress on the surface of the test specimen through laser shock peening, so that the residual stress tends to be consistent.
Description
Technical field
The present invention relates to laser gain material and manufacture stress regulation and control field, refer in particular to a kind of by laser peening regulation and control increasing material manufacture parts
Surface stress and the method for profile.
Background technology
Modern industry high-end equipment forward maximization, high parameter, exceedingly odious under the conditions of highly reliable, the side of long life serve
To fast development, high-performance difficult-to-machine metal large-scale key member manufacturing technology is acknowledged as great high-end equipment manufacture
Basis and core key technology.Laser gain material manufacturing technology is expected to as national defence and industry Grand Equipments medium-and-large-sized difficult-to-machine metal structure
The manufacture of part provide one quickly, flexibility, low cost, high-performance, short-period technology new way.From 1992, based on same
The densified metal component laser gain material manufacturing technology of axle powder-feeding laser fusing deposition worldwide causes the height of people
Paying close attention to, lot of domestic and foreign university and institute are at titanium alloy, nickel base superalloy, unimach, rustless steel, refractory alloy
The laser gain material manufacturing process of contour performance metal material, equip, organize and the aspect such as performance study achieves numerous studies
Really.
Laser gain material manufacturing technology is as a new manufacturing technology, and the regulation and control of its manufacture parts surface residual stress are this technology
It is able to the research field that large-scale application is indispensable.Laser gain material manufactures because its hot worked essence is after exemplar manufactures
Can remain thermic stress, this stress will result in adverse influence, especially to the fatigue behaviour of material and the dimensional accuracy of exemplar
The large thin-wall element that laser gain material is manufactured, when carrying out surface machining, residual stress release often leads to material deformation,
Actual production process needs to carry out the anti-deformation process of complexity, such as cutting, design specialized fixture after bilateral cutting, heat treatment
Deng, these loaded down with trivial details techniques, frock mask laser gain material and manufacture advantage rapidly and efficiently, hinder it to apply.Therefore the present invention
A kind of method proposing laser gain material thin-wall part laser peening stress regulation and control, it utilizes laser blast wave regulation and control to increase material manufacture parts table
The stress distribution in face, enhances sample surface, and has corrected exemplar profile, simplify production technology, eliminates the frock of complexity
Fixture so that laser gain material manufactures part can be widely used in all trades and professions.
Summary of the invention
Based on above not enough, the present invention proposes a kind of method of laser gain material thin-wall part laser peening stress regulation and control, its profit
Increase the stress distribution on material manufacture parts surface with laser blast wave regulation and control, enhance sample surface, and corrected exemplar profile.
The method and technology scheme of the present invention is as follows: a kind of method of laser gain material thin-wall part laser peening stress regulation and control, its
It is characterised by: the method comprises the following steps,
Step 1: based on different laser gain material Fabrication parameters, simulates the thermic of material surface after laser gain material manufactures and answers
Power is distributed；
Step 2: according to the result of step 1, behind simulation calculating processing chip release liner surface, residual stress release causes
Deformation and the deformation that applies of cutter, and calculate the stress distribution after processing；Dynamic strain inspection it is provided with in the side of exemplar
Survey instrument, by dynamic strain detector, measure the strain regime of sample surface in real time, record the position between each point and design size
Put the angular deviation θ between deviation X, and face；
Step 3: result based on step 2, according to the stress distribution of zones of different and deformation condition, formulates laser-impact side
Case, first passes through laser impact forming and corrects position deviation X and the angular deviation θ of deformed region；Calculate the orthopedic rear examination of laser-impact
The residual stress distribution of sample surface, by the residual stress of laser impact intensified adjustment specimen surface so that it is reach unanimity.
Compared with prior art, present invention have the advantage that
1. the surface stress of Effective Regulation laser gain material manufacture parts, strengthens and can be served in more multiplexing its service life
Condition.
2. correct owing to residual stress discharges the deformation that causes, control dimensional accuracy, it is to avoid owing to machining deformation produces
Product rejection.
3. stress regulation and control combines with orthopedic, simplifies technological process, eliminates mach Deformation Control Design, at machine
Add and eliminate midway shutdown heat treatment public affairs skill man-hour, it is ensured that the continuity of processing.
4. when avoiding machining, anti-deformation fixture design, has saved cost.
Accompanying drawing explanation
Fig. 1 is that machining exemplar deforms schematic diagram；
Fig. 2 is that dynamic strain detector arranges schematic diagram；
Fig. 3 is the orthopedic schematic diagram of laser-impact；
Fig. 4 is material surface residual stress distribution after laser gain material manufactures；
Fig. 5 is material surface residual stress distribution after cutting；
Fig. 6 is material surface residual stress distribution after laser-impact.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Following example are used for illustrating the present invention, but are not to limit the present invention.
The present invention relates to laser gain material and manufacture stress regulation and control field, refer in particular to a kind of by laser peening regulation and control increasing material manufacture parts
Surface stress and the method for profile, be primarily based on different laser gain material Fabrication parameters, after simulating laser gain material manufacture
The thermic stress distribution of material surface.Secondly behind simulation calculating processing chip release liner surface, residual stress discharges the change caused
The deformation that shape and cutter apply, and calculate the stress distribution after processing.Stress distribution and change then according to zones of different
Shape condition, formulates laser-impact scheme, first passes through laser impact forming and corrects position deviation X and the angular deviation θ of deformed region.
Finally calculate the residual stress distribution on the orthopedic rear sample coupon surface of laser-impact, by laser impact intensified adjustment specimen surface
Residual stress so that it is reach unanimity.
A kind of method of laser gain material thin-wall part laser peening stress regulation and control, the method comprises the following steps,
Step 1: based on different laser gain material Fabrication parameters, simulates the thermic of material surface after laser gain material manufactures and answers
Power is distributed；Laser power is 1500w, send point rate 0.02g/mm, and during scanning speed 7mm/s, the residual stress of material is as shown in Figure 4,
Material zone line has bigger tension.
Step 2: according to the result of step 1, behind simulation calculating processing chip release liner surface, residual stress release causes
Deformation and the deformation that applies of cutter, and calculate the stress distribution after processing as shown in Figure 4, after processing, tension has subtracted
Little, but material surface still behaves as tension；It is provided with dynamic strain detector in the side of exemplar, is detected by dynamic strain
Instrument, measures the strain regime of sample surface in real time, records position deviation X between each point and design size, and between face
Angular deviation θ；
Step 3: result based on step 2, according to the stress distribution of zones of different and deformation condition, formulates laser-impact side
Case, first passes through laser impact forming and corrects position deviation X and the angular deviation θ of deformed region；Calculate the orthopedic rear examination of laser-impact
The residual stress distribution of sample surface, by the residual stress of laser impact intensified adjustment specimen surface so that it is reach unanimity.
Specific embodiment 1:
Step 1 ', first pass through laser power 500W, scanning speed 350mm/min, powder sending quantity 9g/min, manufacture one thin
Wall pieces sample.
The laser gain material Fabrication parameter of step 2 ', based on step 1 ', simulates the heat of material surface after laser gain material manufactures
Cause stress distribution.
The result of calculation of step 3 ', according to step 2 ', residual stress behind exemplar 3 surface is peeled off in simulation calculating processing chip 1
Discharge the deformation caused and the deformation of cutter 2 applying, and calculate the stress distribution after processing, scribble in the side of exemplar 3
Optics developing agent 4, and it is provided with dynamic strain detector 6, by dynamic strain detector 6, detect the strain on exemplar 3 surface in real time
State, records position deviation X between each point and design size 5, and the angular deviation θ between face.
The result of step 4 ', based on step 3 ', according to the stress distribution of zones of different and deformation condition, formulates laser-impact
Scheme, is needing orthopedic region coating pitch-dark 10 as absorbed layer, and Tu Shui robot 8 applies moisture film conduct on exemplar 3 surface
Restraint layer, laser instrument 7 is launched laser and is impacted deformed region, makes material reversal deformation, and the position correcting deformed region is inclined
Difference X and angular deviation θ.After laser-impact, as shown in Figure 6, material surface is rendered as compressive stress to the residual stress distribution of material list.
Described laser impact forming refers to: after material occurs bending and deformation, when using high power laser impact specimen surface,
Can apply small plastic deformation and residual compressive stress layer at material surface, under the effect of residual compressive stress, material will be along swashing
The incident contrary direction projection of light, forms flexural deformation thus is aligned by material.The method makes material forming by residual stress,
Rather than make material deform shaping by impulsive force.
Calculate the residual stress distribution on orthopedic rear sample coupon 3 surface of laser-impact, by laser impact intensified adjustment sample
The residual stress on surface so that it is reach unanimity.
Claims (1)
1. the method for a laser gain material thin-wall part laser peening stress regulation and control, it is characterised in that: the method comprises the following steps,
Step 1: based on different laser gain material Fabrication parameters, after simulating laser gain material manufacture, the thermic stress of material surface divides
Cloth；
Step 2: according to the result of step 1, behind simulation calculating processing chip release liner surface, residual stress discharges the change caused
The deformation that shape and cutter apply, and calculate the stress distribution after processing；It is provided with dynamic strain detector in the side of exemplar,
By dynamic strain detector, measure the strain regime of sample surface in real time, record the position between each point and design size inclined
Difference angular deviation θ between X, and face；
Step 3: result based on step 2, according to the stress distribution of zones of different and deformation condition, formulates laser-impact scheme, first
Position deviation X and the angular deviation θ of deformed region is corrected by laser impact forming；Calculate the orthopedic rear sample coupon table of laser-impact
The residual stress distribution in face, by the residual stress of laser impact intensified adjustment specimen surface so that it is reach unanimity.
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| CN201610599791.3A CN106048144A (en) | 2016-07-27 | 2016-07-27 | Method for regulating and controlling laser shock shot-blasting stress of laser additive thin-walled part |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107130101A (en) * | 2017-03-15 | 2017-09-05 | 广东长盈精密技术有限公司 | The antidote of terminal enclosure deformation |
| CN107138857A (en) * | 2017-05-08 | 2017-09-08 | 广东工业大学 | A kind of double laser beam compensates synchronous school shape and intensifying device and method automatically |
| CN110629014A (en) * | 2019-09-27 | 2019-12-31 | 江苏大学 | Laser shock strengthening method for dual-phase titanium alloy additive component |
| CN111676354A (en) * | 2020-06-19 | 2020-09-18 | 重庆大学 | Residual stress hammering elimination control method and system based on hammering intervention temperature |
| CN111687553A (en) * | 2020-05-28 | 2020-09-22 | 西安交通大学 | Method for improving residual stress distribution of electric arc additive manufacturing structural part through ultrasonic impact |
| CN111958955A (en) * | 2020-06-30 | 2020-11-20 | 北京航天控制仪器研究所 | Nylon SLS (Selective laser sintering) workpiece plane warpage correction method |
| CN112643055A (en) * | 2020-12-16 | 2021-04-13 | 重庆机电增材制造有限公司 | Part warp deformation correcting device |
| CN113696103A (en) * | 2021-08-18 | 2021-11-26 | 武汉钢铁有限公司 | Long-service-life steel rail treatment method |
| CN114236666A (en) * | 2021-11-30 | 2022-03-25 | 歌尔股份有限公司 | Manufacturing method of glued light guide, performance testing system and electronic equipment |
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| CN101392382A (en) * | 2008-10-15 | 2009-03-25 | 江苏大学 | Method and device for strengthening surface modification by combination of laser cladding and laser peening |
| CN103143593A (en) * | 2011-12-07 | 2013-06-12 | 江苏大学 | Laser shock wave metal plate reshaping method and device |
| CN103752651A (en) * | 2014-01-09 | 2014-04-30 | 上海飞机制造有限公司 | Laser shock shape-correcting method for welded integral panels |
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| CN105154870A (en) * | 2015-09-01 | 2015-12-16 | 广东工业大学 | Metal part remanufacturing method adopting stress control and 3D printing |
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| CN103143593A (en) * | 2011-12-07 | 2013-06-12 | 江苏大学 | Laser shock wave metal plate reshaping method and device |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107130101A (en) * | 2017-03-15 | 2017-09-05 | 广东长盈精密技术有限公司 | The antidote of terminal enclosure deformation |
| CN107138857A (en) * | 2017-05-08 | 2017-09-08 | 广东工业大学 | A kind of double laser beam compensates synchronous school shape and intensifying device and method automatically |
| CN107138857B (en) * | 2017-05-08 | 2019-03-05 | 广东工业大学 | A kind of double laser beam compensates synchronous school shape and intensifying device and method automatically |
| CN110629014A (en) * | 2019-09-27 | 2019-12-31 | 江苏大学 | Laser shock strengthening method for dual-phase titanium alloy additive component |
| CN111687553A (en) * | 2020-05-28 | 2020-09-22 | 西安交通大学 | Method for improving residual stress distribution of electric arc additive manufacturing structural part through ultrasonic impact |
| CN111676354A (en) * | 2020-06-19 | 2020-09-18 | 重庆大学 | Residual stress hammering elimination control method and system based on hammering intervention temperature |
| CN111958955A (en) * | 2020-06-30 | 2020-11-20 | 北京航天控制仪器研究所 | Nylon SLS (Selective laser sintering) workpiece plane warpage correction method |
| CN112643055A (en) * | 2020-12-16 | 2021-04-13 | 重庆机电增材制造有限公司 | Part warp deformation correcting device |
| CN113696103A (en) * | 2021-08-18 | 2021-11-26 | 武汉钢铁有限公司 | Long-service-life steel rail treatment method |
| CN114236666A (en) * | 2021-11-30 | 2022-03-25 | 歌尔股份有限公司 | Manufacturing method of glued light guide, performance testing system and electronic equipment |
| CN114236666B (en) * | 2021-11-30 | 2024-03-29 | 歌尔股份有限公司 | Manufacturing method of glued light guide, performance testing system and electronic equipment |
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Application publication date: 20161026 |