CN101289733A - Laser auxiliary pre-stress shot blasting forming-strengthening composite process - Google Patents
Laser auxiliary pre-stress shot blasting forming-strengthening composite process Download PDFInfo
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- CN101289733A CN101289733A CNA2008101156026A CN200810115602A CN101289733A CN 101289733 A CN101289733 A CN 101289733A CN A2008101156026 A CNA2008101156026 A CN A2008101156026A CN 200810115602 A CN200810115602 A CN 200810115602A CN 101289733 A CN101289733 A CN 101289733A
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Abstract
The invention discloses a laser-assisted prestressed composite method for shot blasting, forming and strengthening. The method is as follows: firstly, a workpiece is deformed as expected in an elastic range through a mechanical preloading method; secondly, the elastic energy concentration region of a part is scanned with a laser beam; thirdly, shot blasting is carried out to the workpiece along a laser scanning path. When the method is adopted for forming, the thermal effect of the interaction between the laser and a material can reduce the deformation resistance (elastic modulus and yield strength) of the material in a laser action region, and can assist the part in shaping through an inhomogeneous thermal stress field established in the thickness direction of the part, thereby the compression bending forming amount, forming efficiency and forming precision of a shaped part can be remarkably improved; moreover, the shot blasting immediately carried out later can strengthen the strain of a heat action region, so as to improve structural mechanical property.
Description
Technical field
The present invention relates to the sheet metal structural forming field, especially a kind of laser auxiliary pre-stress shot blasting forming-strengthening composite process.
Background technology
Such sheet metal components is arranged on the engineering, such as covering and integral body (covering and support rod are integrated) wall panel parts, the integral fuel cell part of rocket, the ship side of boats and ships and the Abdeckteil of deck part and automobile etc. of aircraft, need take the press-bending or curved (the another kind of form of press-bending, formation of parts can rotate with supporting roll when the being bent) mode of rolling to be shaped.
Bending or rolling curved is the main method that present wallboard is shaped.This method is utilized the three-point bending mode wallboard that is shaped, and wallboard is supported by two point of suppon, and deceleration loading device control pressure head preposition on wallboard loads.Wallboard produces viscous deformation under the effect of load, thereby realizes the geometric shape of expection.Press shaping die can be once-forming also can be repeatedly or increment type be shaped (by repeatedly, progressively loading method is shaped blank).Magnitude of load and loading position, and loading sequence all is to need the problem considered in being shaped.
For aircraft skin and wallboard class part, because size is big, structural shape is complicated, adopt that this method deflection is little, the shaping difficulty is big, the big and high part of rib of the local deformaton that can not be shaped amount.It mainly embodies: resistance to deformation is big, springback capacity is big, be prone to deformation damage (as rib wrinkling and cracking etc.), forming accuracy is relatively poor.
Summary of the invention
Problem at prior art exists the object of the present invention is to provide a kind of press shaping die amount, forming efficiency and forming accuracy of significantly improving, and improves the laser auxiliary pre-stress shot blasting forming-strengthening composite process of structured material mechanical property simultaneously.
For achieving the above object, laser auxiliary pre-stress shot blasting forming-strengthening composite process of the present invention is specially:
1) mechanical property and the hot rerum natura of setting up shaped material can wait the correlated performance parameter, and the structure of formation of parts, size and dimension database, and the response pattern of material under mechanical load, thermal load effect are set up emulation platform;
2) based on emulation platform workpiece is carried out virtual combined shaping, describe the resilient energy regularity of distribution, design laser processing parameter and shot-blast process parameter;
3) blank is applied mechanical preload, make it reach the deformation parameter of setting;
4) according to laser processing parameter blank is carried out laser processing, after laser processing was finished, shot peening was carried out to blank in the laser processing path of postponing;
5) feed back the real-time monitor data of the course of processing by the blank state sensor to Controlling System, Controlling System is in time revised processing parameter according to these data, optimizes laser treatment and shot peening process, forms the closed-loop control of the whole course of processing.
When adopting the inventive method to be shaped, both can reduce lasing district distortion of materials drag (Young's modulus and yield strength) by the interactional heat effect of laser-material, can be shaped by its non-homogeneous stress field auxiliary component of on the part thickness direction, setting up again, therefore can significantly improve press shaping die amount and the forming efficiency and the forming accuracy of drip molding; And the shot-peening that carries out following closely can further carry out strain hardening to the heat effect zone, improves structural mechanical property.
Embodiment
A kind of laser auxiliary pre-stress shot blasting forming-strengthening composite process of the present invention, be specially: mechanical property and the hot rerum natura of 1) setting up shaped material can wait the correlated performance parameter, the structure of formation of parts, size and dimension database, and the response pattern of material under mechanical load, thermal load effect, set up emulation platform; 2) based on emulation platform workpiece is carried out virtual combined shaping, describe the resilient energy regularity of distribution, design laser processing parameter and shot-blast process parameter; 3) blank is applied mechanical preload, make it reach the deformation parameter of setting; 4) according to laser processing parameter blank is carried out laser processing, and shot peening is carried out to blank in the laser processing path of postponing; 5) feed back the real-time monitor data of the course of processing by the blank state sensor to Controlling System, Controlling System is in time revised processing parameter according to these data, optimizes laser treatment and shot peening process, forms the closed-loop control of the whole course of processing.
This method at first with mechanical preload method make workpiece in elastic range, take place the expection distortion, then to part resilient energy concentrated area with laser beam flying, along laser beam scan path workpiece is carried out shot-peening at last.When adopting this method to be shaped, both can reduce lasing district distortion of materials drag (Young's modulus and yield strength) by the interactional heat effect of laser-material, can be shaped by its non-homogeneous stress field auxiliary component of on the part thickness direction, setting up again, therefore can significantly improve press shaping die amount and the forming efficiency and the forming accuracy of above-mentioned drip molding; And the shot-peening that carries out following closely can further carry out strain hardening to the heat effect zone, improves structural mechanical property.Because when carrying out shot-peening, the laser irradiation heat effect still exists, local material still is in higher relatively temperature, resistance to deformation is relatively low, shot-peening will form residual compressive stress in bigger zone, and unrelieved stress distributes more even relatively in certain zone, and this will better improve material antifatigue destructive characteristics.
The present invention is based on traditional mechanically shape method, introduce the heat effect and the shot peening strengthening effect of laser scanning, can can't realize expecting that the workpiece that is shaped forms simultaneously and strengthens this method has overcome mechanically shape and may bring drip molding damage even destructive shortcoming to mechanical means, also solve the performance degradation problem that heat effect may cause material.Mainly comprise following three aspects: the first, the heat effect of Reciprocity of Laser ﹠ Materials reduces material Young's modulus decline, yield strength when being shaped of drip molding regional area; The second, the material cold working hardening effect of utilizing shot-peening to cause applies compressive residual stress, strengthening material mechanical property to structure.Three, after laser beam flying, carry out shot-peening along same path immediately, can utilize localized hyperthermia to reduce the fact of material deformation drag, obtain the shot-peening effect more even, that scope is bigger.
Claims (1)
- Laser auxiliary pre-stress shot blasting forming-strengthening composite process is specially:1) mechanical property and the hot rerum natura of setting up shaped material can wait the correlated performance parameter, and the structure of formation of parts, size and dimension database, and the response pattern of material under mechanical load, thermal load effect are set up emulation platform;2) based on emulation platform workpiece is carried out virtual combined shaping, describe the resilient energy regularity of distribution, design laser processing parameter and shot-blast process parameter;3) blank is applied mechanical preload, make it reach the deformation parameter of setting;4) according to laser processing parameter blank is carried out laser scanning manufacturing, and shot peening is carried out to blank in the laser processing path of postponing;5) feed back the real-time monitor data of the course of processing by the blank state sensor to Controlling System, Controlling System is in time revised processing parameter according to these data, optimizes laser treatment and shot peening process, forms the closed-loop control of the whole course of processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101156026A CN101289733A (en) | 2008-06-25 | 2008-06-25 | Laser auxiliary pre-stress shot blasting forming-strengthening composite process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101156026A CN101289733A (en) | 2008-06-25 | 2008-06-25 | Laser auxiliary pre-stress shot blasting forming-strengthening composite process |
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| CN101289733A true CN101289733A (en) | 2008-10-22 |
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| CNA2008101156026A Pending CN101289733A (en) | 2008-06-25 | 2008-06-25 | Laser auxiliary pre-stress shot blasting forming-strengthening composite process |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248048A (en) * | 2011-03-14 | 2011-11-23 | 中国科学院力学研究所 | Laser-assisted incremental forming methods for rib thin-wall integrated metal workpiece |
| CN103406419A (en) * | 2013-08-06 | 2013-11-27 | 西北工业大学 | Forming device and forming method of electromagnetic induction assisting prestress |
| CN105057891A (en) * | 2015-07-16 | 2015-11-18 | 广东欧珀移动通信有限公司 | Method for preventing metal piece from deforming, shell, manufacturing method of shell and mobile terminal |
| CN105479095A (en) * | 2015-12-31 | 2016-04-13 | 中国航空工业集团公司北京航空制造工程研究所 | Shot blasting forming method based on friction stir machining local plasticization |
| CN106041344A (en) * | 2016-08-17 | 2016-10-26 | 广东工业大学 | Method for controlling laser shot peening shape correction quality for aviation engine supports |
| CN106216685A (en) * | 2016-08-28 | 2016-12-14 | 赵晴堂 | Three-dimensional increasing material molding consolidation system |
| CN109234506A (en) * | 2018-10-10 | 2019-01-18 | 温州大学激光与光电智能制造研究院 | A kind of laser assisted mechanic shot peening forms the complex method of gradient nano structure |
| CN109234518A (en) * | 2018-10-22 | 2019-01-18 | 江苏大学 | A kind of method and apparatus that flat part prestressing force is laser impact intensified |
| CN112501425A (en) * | 2020-11-27 | 2021-03-16 | 山东大学 | Laser surface strengthening method with inverse Gaussian distribution shock wave intensity |
| CN112877521A (en) * | 2021-01-14 | 2021-06-01 | 上海交通大学 | Surface strengthening device and method for applying elastic stress field to metal workpiece and assisting ultrasonic rolling |
| CN114921736A (en) * | 2022-04-18 | 2022-08-19 | 中航西安飞机工业集团股份有限公司 | Clamp for inhibiting shot blasting deformation of fuselage skin window frame part and shot blasting method |
| CN115058564A (en) * | 2022-05-25 | 2022-09-16 | 新疆八一钢铁股份有限公司 | Manufacturing method of withdrawal and straightening machine roller |
-
2008
- 2008-06-25 CN CNA2008101156026A patent/CN101289733A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248048A (en) * | 2011-03-14 | 2011-11-23 | 中国科学院力学研究所 | Laser-assisted incremental forming methods for rib thin-wall integrated metal workpiece |
| CN102248048B (en) * | 2011-03-14 | 2013-04-17 | 中国科学院力学研究所 | Laser-assisted incremental forming methods for rib thin-wall integrated metal workpiece |
| CN103406419A (en) * | 2013-08-06 | 2013-11-27 | 西北工业大学 | Forming device and forming method of electromagnetic induction assisting prestress |
| CN103406419B (en) * | 2013-08-06 | 2015-06-10 | 西北工业大学 | Forming device and forming method of electromagnetic induction assisting prestress |
| CN105057891A (en) * | 2015-07-16 | 2015-11-18 | 广东欧珀移动通信有限公司 | Method for preventing metal piece from deforming, shell, manufacturing method of shell and mobile terminal |
| CN105479095A (en) * | 2015-12-31 | 2016-04-13 | 中国航空工业集团公司北京航空制造工程研究所 | Shot blasting forming method based on friction stir machining local plasticization |
| CN106041344B (en) * | 2016-08-17 | 2018-03-23 | 广东工业大学 | A kind of laser peening school form quality amount control method for aeroplane engine machine support |
| CN106041344A (en) * | 2016-08-17 | 2016-10-26 | 广东工业大学 | Method for controlling laser shot peening shape correction quality for aviation engine supports |
| CN106216685A (en) * | 2016-08-28 | 2016-12-14 | 赵晴堂 | Three-dimensional increasing material molding consolidation system |
| CN106216685B (en) * | 2016-08-28 | 2018-10-19 | 赵晴堂 | Three-dimensional increases material and is molded intensifying method |
| CN109234506A (en) * | 2018-10-10 | 2019-01-18 | 温州大学激光与光电智能制造研究院 | A kind of laser assisted mechanic shot peening forms the complex method of gradient nano structure |
| CN109234506B (en) * | 2018-10-10 | 2020-05-22 | 温州大学激光与光电智能制造研究院 | Composite method for forming gradient nano structure by laser-assisted mechanical shot blasting |
| CN109234518A (en) * | 2018-10-22 | 2019-01-18 | 江苏大学 | A kind of method and apparatus that flat part prestressing force is laser impact intensified |
| CN112501425A (en) * | 2020-11-27 | 2021-03-16 | 山东大学 | Laser surface strengthening method with inverse Gaussian distribution shock wave intensity |
| CN112877521A (en) * | 2021-01-14 | 2021-06-01 | 上海交通大学 | Surface strengthening device and method for applying elastic stress field to metal workpiece and assisting ultrasonic rolling |
| CN114921736A (en) * | 2022-04-18 | 2022-08-19 | 中航西安飞机工业集团股份有限公司 | Clamp for inhibiting shot blasting deformation of fuselage skin window frame part and shot blasting method |
| CN114921736B (en) * | 2022-04-18 | 2024-02-13 | 中航西安飞机工业集团股份有限公司 | Clamp for inhibiting shot peening deformation of fuselage skin window frame part and shot peening method |
| CN115058564A (en) * | 2022-05-25 | 2022-09-16 | 新疆八一钢铁股份有限公司 | Manufacturing method of withdrawal and straightening machine roller |
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Open date: 20081022 |