CN102168952A - Detection method and detection device of welding deformation - Google Patents
Detection method and detection device of welding deformation Download PDFInfo
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- CN102168952A CN102168952A CN 201010605677 CN201010605677A CN102168952A CN 102168952 A CN102168952 A CN 102168952A CN 201010605677 CN201010605677 CN 201010605677 CN 201010605677 A CN201010605677 A CN 201010605677A CN 102168952 A CN102168952 A CN 102168952A
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Abstract
The invention discloses a detection method of welding deformation. The method comprises the step of generating small enough light spots on a surface of a weldment by employing a laser source as a detection tool; capturing a position variation of the light spots before welding and after welding via an imaging device; and processing the position variation by a computer to accurately measure deformation of the weldment. The method exhibits high measuring precision and is especially suitable to measure relatively minor deformation of welded structures through a high-energy density beam welding method. The invention also discloses a detection device for realizing the detection method. The detection device comprises the laser source (1), the imaging device (2) and the computer with image processing software (9). The imaging device is arranged on a reflected light transmission path generated by the reflection of a laser beam (2) emitted by the laser source (1) via a surface of a to-be-detected object (5). Image information of the reflected light is collected by the imaging device and sent to the computer (9) to be processed by the image processing software installed in the computer for imaging on the screen of the computer. The detection device exhibits high detection efficiency and causes no damage to workpieces.
Description
Technical field
The present invention relates to a kind of detection method of welding deformation and realize the pick-up unit of this method, relate in particular to a kind of pick-up unit that is used for the detection method of high energy beam current welding deformation and realizes this method.
Background technology
In welding process, the expanding with heat and contract with cold of weld metal all is subjected on every side restraining of metal and can not freely stretches, and causes workpiece to have unrelieved stress and residual deformation at postwelding.The existence of residual deformation not only influences the dimensional accuracy and the outward appearance of structure, and might reduce its load-bearing capacity and mechanical property, and therefore control and adjustment welding deformation are very important.Welding deformation is measured fast and accurately, is Evaluation and Control and the necessary means of adjusting the welding deformation effect, also is used to verify simultaneously the resonable degree of welding deformation numerical simulation result.It is generally bigger that traditional welding method obtains the welding work pieces deflection, do not carrying out can reaching several millimeters under the strong constraint condition, even tens of millimeter.The high energy beam current welding method comprises EBW (electron beam welding), Laser Welding (LBW), laser melting coating weldering, beam-plasma weldering etc., because the energy density high concentration, consequently the deflection of postwelding workpiece is little, and especially deflection is very little under the strong constraint condition.
Traditional welding deformation measuring method, as paste foil gauge on workpiece, measuring accuracy is lower, and optical interferometry, photoelectricity deformation measurement method etc. also obtain to use more widely because measurement mechanism is complicated.Using wider is point of fixity duplicate measurements welding deformation: the principle of this measuring method is: at measurement point or a plurality of measurement point mark point.Before and after welding, measure gauge length, this stage that is of the respective change correspondence of its numerical value is welded the weldment deflection that causes.The available several different methods of the mensuration of gauge length is measured, and has brought into use digital camera to measure gauge length in recent years: adopt digital camera that weldment is taken, and import the digital picture that photographs into computing machine fast by the serial port on the computing machine; With the digital picture process binaryzation of gained, extract the image-region that needs on computers, so that the notion in the utilization geometry is analyzed and described.In the binary conversion treatment image, extract the measurement point of prior demarcation, pass through image processing program, measure the pixel between the measurement point, calculate corresponding actual distance value again, with the preceding distance of measuring of itself and weldering relatively, can calculate this welded residual shrinkage deflection.In like manner this method also can detect the edge of test specimen, obtains the angular deformation and the vertically deflection of test specimen through how much conversions.In order to improve measuring accuracy, the direct mark point or mark the smaller the better on weldment surface, the error that produces by what of digital camera pixel count when the precision of this method is subject to the size of measurement point and measures gauge length, punctuate that this contact type measurement is directly beaten on the weldment surface or the mark of doing can not be enough little, cause measuring accuracy poor, be unfavorable in the high energy beam current welding method, measuring the original just very little situation of welding deformation amount.
Summary of the invention
The technical problem to be solved in the present invention is to provide the big or small enough little pick-up unit that can be used for the welding deformation detection method of high energy beam current welding deformation and realize this welding deformation detection method of a kind of punctuate or mark.
For solving the problems of the technologies described above, a kind of welding deformation detection method of the present invention may further comprise the steps: before the welding, lasing light emitter is to a certain position, measured object surface emitting incident light bundle, form folded light beam, imaging device collection folded light beam and the light spot image that folded light beam is formed convert numerical information to, light spot image numerical information machine as calculated is reduced into light spot image, obtain the position coordinates of light spot image mass center, after the welding, lasing light emitter is to measured object surface same position emitting incident light bundle, form folded light beam, imaging device collection folded light beam and the light spot image that folded light beam is formed convert numerical information to, light spot image numerical information machine as calculated is reduced into light spot image, obtain the position coordinates of light spot image mass center, carry out displacement and demarcate welding distance between the facula mass center after preceding and the welding, converse the deflection before and after the somewhere welding of measured object surface.
Realize the pick-up unit of this welding deformation detection method, it is characterized in that: comprise lasing light emitter, imaging device and the computing machine of image processing software is installed, give off laser beam on the reflected light transmission path that the measured object surface reflection forms at described lasing light emitter, be provided with imaging device, imaging device is gathered catoptrical image information, be sent to computing machine, the image processing software of machine installation is handled back imaging on computer screen as calculated.The laser beam that described lasing light emitter sends is at first by converging the mirror group, just arrive the measured object surface then, described imaging device comprises focus lamp group and video camera, and reflected light at first arrives video camera again by the focus lamp group, described video camera is a Digital Video, and video frequency collection card is housed.The laser beam that described lasing light emitter sends is 50mW, and wavelength is 532nm.
The present invention has following good effect than prior art.A kind of welding deformation detection method of the present invention, owing to be a kind of non-contact type welding deformation measuring method, adopt mW level laser source as testing tool, the hot spot point that forms on the weldment surface is enough little, can implement accurate measurement to the distortion that workpiece takes place, the measuring accuracy height is particularly useful for the measurement that the high energy beam current welding method obtains less welded structure distortion.The measurement mechanism of realizing this measuring method simultaneously is simple, and the detection efficiency height does not have destruction to workpiece.
Description of drawings
Fig. 1 is a kind of welding deformation detection method of the present invention and the schematic diagram of realizing the pick-up unit of this method.
Embodiment
Fig. 1 is the detection method of a kind of welding deformation of the present invention, may further comprise the steps: before the welding, laser instrument 1 output 50mW wavelength 532nm laser beam 2 is superfine incident light 4 by converging to converge after the mirror group 3, arrive back, welding work pieces 5 surface at incident light 4 and form the very tiny speck of size, the imaging device of focus lamp group 6 and Digital Video 7 compositions is aimed at this speck and near zone with certain angle of inclination simultaneously, make it imaging on Digital Video 7, through video frequency collection card 8 images acquired information and be sent to the computing machine 9 that image processing software is housed, handle the position coordinates of back acquisition light spot image mass center 10 through image processing software.A certain position, welding work pieces surface is before weldering and the displacement of postwelding laser facula barycenter, and corresponding promptly is the welding deformation amount of this point.
Realize the pick-up unit of this welding deformation detection method, it is characterized in that: comprise lasing light emitter 1, imaging device and the computing machine 9 of image processing software is installed, give off laser beam 2 on the reflected light transmission path that measured object 5 surface reflections form at described lasing light emitter 1, be provided with imaging device, imaging device is gathered catoptrical image information, be sent to computing machine 9, the image processing software of machine 9 installations is handled back imaging on computer screen as calculated.The laser beam 2 that described lasing light emitter 1 sends is at first by converging mirror group 3, be formed into irradiating light beam 4 and just arrive measured object 5 surfaces then, described imaging device comprises focus lamp group 6 and video camera 7, reflected light at first arrives video camera 7 again by focus lamp group 6, described video camera 7 is Digital Video, and video frequency collection card 8 is housed.The laser beam 2 that described lasing light emitter 1 sends is that the 50mW wavelength is 532nm.
Claims (5)
1. the detection method of a welding deformation, it is characterized in that: may further comprise the steps: before the welding, lasing light emitter (1) is to the surperficial a certain position emitting incident light bundle of measured object (5) (4), form folded light beam, imaging device collection folded light beam and the light spot image that folded light beam is formed convert numerical information to, light spot image numerical information machine (9) as calculated is reduced into light spot image, obtain the position coordinates (10) of light spot image mass center, after the welding, lasing light emitter (1) is to measured object (5) surperficial same position emitting incident light bundle (4), form folded light beam, imaging device collection folded light beam and the light spot image that folded light beam is formed convert numerical information to, light spot image numerical information machine (9) as calculated is reduced into light spot image, obtain the position coordinates (11) of light spot image mass center, carry out displacement and demarcate welding distance between the facula mass center after preceding and the welding, converse the deflection before and after the somewhere welding of measured object surface.
2. realize the pick-up unit of the described welding deformation detection method of claim 1, it is characterized in that: comprise lasing light emitter (1), imaging device and the computing machine (9) of image processing software is installed, give off laser beam (2) on the reflected light transmission path that measured object (5) surface reflection forms at described lasing light emitter (1), be provided with imaging device, imaging device is gathered catoptrical image information, be sent to computing machine (9), the image processing software of machine (9) installation is handled back imaging on computer screen as calculated.
3. pick-up unit according to claim 2 is characterized in that: the laser beam (2) that described lasing light emitter (1) sends at first by converging mirror group (3), is formed into irradiating light beam (4), just arrives measured object (5) surface then.
4. pick-up unit according to claim 2 is characterized in that: described imaging device comprises focus lamp group (6) and video camera (7), and reflected light at first arrives video camera (7) again by focus lamp group (6).
5. pick-up unit according to claim 4 is characterized in that: described video camera (7) is a Digital Video, and video frequency collection card (8) is housed.
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| CN 201010605677 CN102168952A (en) | 2010-12-27 | 2010-12-27 | Detection method and detection device of welding deformation |
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| CN 201010605677 CN102168952A (en) | 2010-12-27 | 2010-12-27 | Detection method and detection device of welding deformation |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359871A (en) * | 2014-10-16 | 2015-02-18 | 爱彼思（苏州）自动化科技有限公司 | High-precision non-contact gloss detection method and device |
| CN104492861A (en) * | 2014-11-25 | 2015-04-08 | 唐山轨道客车有限责任公司 | Device and method for correcting welding deformation of weldment |
| CN104807410A (en) * | 2015-04-14 | 2015-07-29 | 西安交通大学 | Quick phototyping by laser cladding layer height measuring device and closed-loop control method thereof |
| CN105509649A (en) * | 2015-12-18 | 2016-04-20 | 清华大学 | Device and method for measuring deformation of high-speed rotating object under high-temperature environment |
| CN106949843A (en) * | 2016-01-07 | 2017-07-14 | 上海新微技术研发中心有限公司 | Device and method for detecting warping degree of micro-mirror surface |
| CN111515624A (en) * | 2020-04-30 | 2020-08-11 | 德阳天蜀机械设备制造有限公司 | Repair process for runner blade |
| CN111736430A (en) * | 2019-03-25 | 2020-10-02 | 佳能株式会社 | Shutter device, exposure device, and article manufacturing method |
| CN111889920A (en) * | 2020-07-28 | 2020-11-06 | 中车大连电力牵引研发中心有限公司 | Wireless closed-loop control method and device for inhibiting welding deformation of medium plate based on laser and storage medium |
| CN113751934A (en) * | 2021-10-15 | 2021-12-07 | 安迅捷智能机器人(宁夏)有限责任公司 | Positioning system, welding method and welding deformation measuring method |
| CN114136240A (en) * | 2021-12-01 | 2022-03-04 | 南通大学 | Image acquisition device for measuring eccentricity of optical fiber perform |
| CN115401285A (en) * | 2022-07-28 | 2022-11-29 | 成都飞机工业（集团）有限责任公司 | Automatic heating equipment for cable soldering tin ring and use method |
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| CN201225883Y (en) * | 2008-06-12 | 2009-04-22 | 同济大学 | Practical digital speckle relevant test system instrument |
| CN101750416A (en) * | 2008-12-19 | 2010-06-23 | 中国科学院沈阳自动化研究所 | Visual welding seam surface quality detection sensor based on line structure light |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201225883Y (en) * | 2008-06-12 | 2009-04-22 | 同济大学 | Practical digital speckle relevant test system instrument |
| CN101750416A (en) * | 2008-12-19 | 2010-06-23 | 中国科学院沈阳自动化研究所 | Visual welding seam surface quality detection sensor based on line structure light |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359871A (en) * | 2014-10-16 | 2015-02-18 | 爱彼思（苏州）自动化科技有限公司 | High-precision non-contact gloss detection method and device |
| CN104492861A (en) * | 2014-11-25 | 2015-04-08 | 唐山轨道客车有限责任公司 | Device and method for correcting welding deformation of weldment |
| CN104492861B (en) * | 2014-11-25 | 2016-08-24 | 唐山轨道客车有限责任公司 | The apparatus for correcting of weldment welding deformation and antidote |
| CN104807410A (en) * | 2015-04-14 | 2015-07-29 | 西安交通大学 | Quick phototyping by laser cladding layer height measuring device and closed-loop control method thereof |
| CN105509649A (en) * | 2015-12-18 | 2016-04-20 | 清华大学 | Device and method for measuring deformation of high-speed rotating object under high-temperature environment |
| CN106949843A (en) * | 2016-01-07 | 2017-07-14 | 上海新微技术研发中心有限公司 | Device and method for detecting warping degree of micro-mirror surface |
| CN111736430B (en) * | 2019-03-25 | 2024-04-05 | 佳能株式会社 | Shutter device, exposure device, and article manufacturing method |
| CN111736430A (en) * | 2019-03-25 | 2020-10-02 | 佳能株式会社 | Shutter device, exposure device, and article manufacturing method |
| CN111515624A (en) * | 2020-04-30 | 2020-08-11 | 德阳天蜀机械设备制造有限公司 | Repair process for runner blade |
| CN111889920A (en) * | 2020-07-28 | 2020-11-06 | 中车大连电力牵引研发中心有限公司 | Wireless closed-loop control method and device for inhibiting welding deformation of medium plate based on laser and storage medium |
| CN111889920B (en) * | 2020-07-28 | 2022-07-05 | 中车大连电力牵引研发中心有限公司 | Wireless closed-loop control method and device for inhibiting welding deformation of medium plate based on laser and storage medium |
| CN113751934A (en) * | 2021-10-15 | 2021-12-07 | 安迅捷智能机器人(宁夏)有限责任公司 | Positioning system, welding method and welding deformation measuring method |
| CN113751934B (en) * | 2021-10-15 | 2024-05-28 | 安迅捷智能机器人(宁夏)有限责任公司 | Positioning system, welding method and welding deformation measuring method |
| CN114136240A (en) * | 2021-12-01 | 2022-03-04 | 南通大学 | Image acquisition device for measuring eccentricity of optical fiber perform |
| CN115401285A (en) * | 2022-07-28 | 2022-11-29 | 成都飞机工业（集团）有限责任公司 | Automatic heating equipment for cable soldering tin ring and use method |
| CN115401285B (en) * | 2022-07-28 | 2024-06-07 | 成都飞机工业（集团）有限责任公司 | Automatic heating equipment for cable soldering tin ring and use method |
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Application publication date: 20110831 |