CN104999178A - Laser welding device carrying multiple sensors - Google Patents
Laser welding device carrying multiple sensors Download PDFInfo
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- CN104999178A CN104999178A CN201510519631.9A CN201510519631A CN104999178A CN 104999178 A CN104999178 A CN 104999178A CN 201510519631 A CN201510519631 A CN 201510519631A CN 104999178 A CN104999178 A CN 104999178A
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- laser
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- soldering device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
Abstract
The invention relates to a laser welding device, particularly to a laser welding device carrying multiple sensors. The device comprises a laser 1, a convex lens 2, a coaxial optical sensor 3, a lateral optical sensor 4, an acoustic sensor 5, a back sensor 6, a welding pool 7, a welded material 8, a charge detection meter 9, a welding nozzle 10, inert shielding gas 11 and a half-reflecting mirror 12, wherein the back sensor 6 is mounted at the back of the welded material 8; the welded material 8 is in series connection with the welding nozzle 10 through a lead; the middle of the lead is also in series connection with the charge detection meter 9. With the adoption of the device, refractory materials such as titanium, quartz and the like can be welded, anisotropic materials can be welded, and the effect is good; the device is exquisite in structure as well as safe and reliable to use and has the certain economical and applicable value, and the equipment manufacturing cost is moderate; the welding quality is good, the automation degree is high, and a large quantity of manpower and material resources are saved.
Description
Technical field
The present invention relates to laser soldering device, be specifically related to the laser soldering device carrying multiple sensor.
Background technology
Laser weld is one of importance of Materialbearbeitung mit Laserlicht technology application, often be called again laser welder, radium-shine welding machine, laser die welding machine (hand-held welder), automatic laser welding machine, laser spot welder, Optical Fiber Transmission laser-beam welding machine often can be divided into by its working method, photocoagulation utilizes high-octane laser pulse to carry out the local heat in tiny area to material, the energy of laser emission, by the diffusion inside of heat transfer to material, forms specific molten bath to reach the object of welding by after material fusing.Laser beam welding monitoring and quality control are important contents of laser weld area research and development always, utilize the various sensors such as inductance, electric capacity, sound wave, photoelectricity, vision, by artificial intelligence and computer processing method, for different laser beam weldings and requirement, realize such as weld joint tracking, defects detection, quality of weld seam molding monitoring etc., and regulate welding condition by FEEDBACK CONTROL, thus realize high-quality automatic laser welding process.The main contents that laser beam welding controls are exactly the control to welding condition.When laser weld, beam focal location is one of technological parameter affecting Laser Deep Penetration Welding quality most critical and the most difficult monitor and forecast.Under certain laser power and speed of welding, when only having focus to be in optimal focus position scope, just can obtain maximum fusion penetration and good appearance of weld.Depart from this scope, fusion penetration then declines, and even destroys stable deep penetration welding process, becomes the welding of pattern instability or thermal conductance weldering.But during practical laser welding, there is the stability of various factors focal position, comprise the welding tip-workpiece distance change because on-plane surface workpiece and welding deformation cause, the element such as laser window, focus lamp thermal lensing effect causes the change of focal position, and light beam diverse location in flight light path causes the change etc. of focal position.Key how to determine focal position of laser rapidly and to be controlled in suitable scope.
In order to improve the quality of laser weld, if design a kind of laser soldering device carrying multiple sensor, current a lot of enterprise thirsts for just.
Summary of the invention
The present invention is directed to above-mentioned existing problems, various sensor can be utilized, by artificial intelligence and computer processing method, for different laser beam weldings and requirement, realize such as weld joint tracking, defects detection, quality of weld seam molding monitoring etc., and regulate welding condition by FEEDBACK CONTROL, thus realize high-quality automatic laser welding process.The occasions such as machining factory, automobile factory, chemical plant can be applied to widely.
The technical solution that the present invention relates to:
As shown in Figure 1, carry the laser soldering device of multiple sensor, it is characterized in that: this device is made up of laser 1, convex lens 2, axis optical sensor 3, side optical pickocff 4, acoustic sensor 5, back side sensor 6, welding pool 7, soldered material 8, charge detection table 9, welding tip 10, inert protective gas 11, half-reflecting mirror 12; Wherein back side sensor 6 is arranged on the back side of soldered material 8; Soldered material 8 and welding tip 10 wired in series, charge detection table 9 of connecting again in the middle of wire; Side optical pickocff 4 and acoustic sensor 5 are arranged on a side of welding pool 7; In the laser path that the level that is arranged on convex lens 2 and axis optical sensor 3 passes to; Half-reflecting mirror 12 to be arranged on directly over welding pool 7 and horizontal by miter angle; Inert protective gas 11 is sprayed inside welding tip 10.Utilize photoelectric sensor automatically can detect change because of laser power, speed of welding, focal position, weld penetration that nozzle to the fluctuation of the process conditions such as surface of the work distance, butt-joint clearance causes and forming quality in welding process, not only can diagnose out such as undercut, burn, the appearance of weld defect such as hump, and weld seam internal soundness can also be detected under certain process conditions, such as, the order of severity of pore tendency.Utilizing various sensor to carry out detection to the plasma produced in laser beam welding is conventional and effective method.Charge detection table 9 detected object is the electric charge of welding tip and surface of the work plasma.Acoustic sensor 5 detected object is mainly sound oscillation and the sound emission of plasma in welding process.Axis optical sensor 3, side optical pickocff 4, be plasma in laser beam welding (comprise above workpiece and aperture inner) light radiation and molten bath light radiation etc. with back side sensor 6 detected object.From the installation of checkout gear, mainly comprise the direct gaze detection coaxial with laser beam, side detects and the back side is detected.The sensor used mainly contains photodiode, photocell, CCD and high-speed camera, and spectroanalysis instrument etc.
The further technical solution of the present invention is:
The wavelength of described laser 1 is 1.04 ~ 1.07 microns.
The pulse width of described laser 1 is 0.2 ~ 12 millisecond.
The pulse frequency of described laser 1 is 10 ~ 90 hertz.
The power density of described laser (1) is at 104 ~ 106 watts/square centimeter.
Described inert protective gas 11 is argon gas.Argon gas is relatively cheap, and density is comparatively large, so protected effect is better, use the weldment surface of argon shield than during the protection of use helium smooth.
Described acoustic sensor 5 is apart from 11 ~ 12 centimetres, the center of welding pool 7.
Described side optical pickocff 4 is apart from 8 ~ 9 centimetres, the center of welding pool 7.
Beneficial effect of the present invention:
One, the present invention is adopted can to weld refractory material as titanium, quartz etc., and can to unlike material welding, respond well.After Laser Focusing, power density is high, and when high-power component welds, depth-to-width ratio can reach 5: 1, reaches as high as 10: 1.Can miniature welding be carried out, after laser beam line focus, very little hot spot can be obtained, and can accurately locate, can be applicable in the assembly welding of micro-, the miniature workpiece of automated production in enormous quantities.Inaccessible position can be welded, implement noncontact and weld at a distance, there is very large flexibility.
Two, delicate structure of the present invention, laser beam easily realize light beam temporally with space light splitting, can carry out multiple beam process simultaneously and multistation processing, for more accurate welding provides condition.Equipment manufacturing cost is moderate, safe and reliable, has certain economic and practical value.
Three, the present invention has wide popularizing application prospect, can be widely used in machining factory, Railway Car Plant, bridge construction scene.Welding quality is good and automaticity is high, saves a large amount of manpower and materials.
Accompanying drawing explanation
Accompanying drawing 1 is general structure schematic diagram of the present invention;
In Fig. 1: laser 1, convex lens 2, axis optical sensor 3, side optical pickocff 4, acoustic sensor 5, back side sensor 6, welding pool 7, soldered material 8, charge detection table 9, welding tip 10, inert protective gas 11, half-reflecting mirror 12.
Detailed description of the invention
As shown in Figure 1, this device is made up of laser 1, convex lens 2, axis optical sensor 3, side optical pickocff 4, acoustic sensor 5, back side sensor 6, welding pool 7, soldered material 8, charge detection table 9, welding tip 10, inert protective gas 11, half-reflecting mirror 12; Wherein back side sensor 6 is arranged on the back side of soldered material 8; Soldered material 8 and welding tip 10 wired in series, charge detection table 9 of connecting again in the middle of wire; Side optical pickocff 4 and acoustic sensor 5 are arranged on a side of welding pool 7; In the laser path that the level that is arranged on convex lens 2 and axis optical sensor 3 passes to; Half-reflecting mirror 12 to be arranged on directly over welding pool 7 and horizontal by miter angle; Inert protective gas 11 is sprayed inside welding tip 10.Utilizing various sensor to carry out detection to the plasma produced in laser beam welding is conventional and effective method.According to the difference of detection signal, Laser Welding Quality detects and mainly comprises following several mode: from the installation of checkout gear, mainly comprise the direct gaze detection coaxial with laser beam, side detects and the back side is detected.The sensor used mainly contains photodiode, photocell, CCD and high-speed camera, and spectroanalysis instrument etc.Voice signal detects.Detected object is mainly sound oscillation and the sound emission of plasma in welding process.Plasma charge signal.Detected object is the electric charge of welding tip and surface of the work plasma.The change of plasma light radiation intensity in photoelectric sensor detection laser welding process is utilized to be one of important method of laser beam welding Inspect and control.Utilize photoelectric sensor automatically can detect change because of laser power, speed of welding, focal position, weld penetration that nozzle to the fluctuation of the process conditions such as surface of the work distance, butt-joint clearance causes and forming quality in welding process, not only can diagnose out such as undercut, burn, the appearance of weld defect such as hump, and weld seam internal soundness can also be detected under certain process conditions, such as, the order of severity of pore tendency.Under certain laser power and speed of welding, when only having focus to be in optimal focus position scope, just can obtain maximum fusion penetration and good appearance of weld.Depart from this scope, fusion penetration then declines, and even destroys stable deep penetration welding process, becomes the welding of pattern instability or thermal conductance weldering.Utilizing the plasma produced in axis optical sensor 3, side optical pickocff 4, acoustic sensor 5, back side sensor 6 pairs of laser beam weldings to carry out detection is conventional and effective method.Sensor also will arrange concrete distance, and such as, described side optical pickocff 4 is apart from 8 ~ 9 centimetres, the center of welding pool 7.Described acoustic sensor 5 is apart from 11 ~ 12 centimetres, the center of welding pool 7.Argon gas is relatively more cheap, and density is comparatively large, so protected effect is better, described inert protective gas 11 is argon gas.The present invention also carries out concrete regulation to laser, and the wavelength of described laser 1 is 1.04 ~ 1.07 microns.The pulse width of described laser 1 is 0.2 ~ 12 millisecond.The pulse frequency of described laser 1 is 10 ~ 90 hertz.The power density of described laser (1) is at 104 ~ 106 watts/square centimeter.Utilizing various sensor to carry out detection to the plasma produced in laser beam welding is conventional and effective method.Charge detection table 9 detected object is the electric charge of welding tip and surface of the work plasma.Acoustic sensor 5 detected object is mainly sound oscillation and the sound emission of plasma in welding process.Axis optical sensor 3, side optical pickocff 4, be plasma in laser beam welding (comprise above workpiece and aperture inner) light radiation and molten bath light radiation etc. with back side sensor 6 detected object.From the installation of checkout gear, mainly comprise the direct gaze detection coaxial with laser beam, side detects and the back side is detected.The sensor used mainly contains photodiode, photocell, CCD and high-speed camera, and spectroanalysis instrument etc.
To sum up, the laser soldering device carrying multiple sensor designed by the present invention, can reach the object of expection.
Claims (8)
1. carry the laser soldering device of multiple sensor, it is characterized in that: this device is made up of laser (1), convex lens (2), axis optical sensor (3), side optical pickocff (4), acoustic sensor (5), back side sensor (6), welding pool (7), soldered material (8), charge detection table (9), welding tip (10), inert protective gas (11), half-reflecting mirror (12); Wherein back side sensor (6) is arranged on the back side of soldered material (8); Soldered material (8) and welding tip (10) wired in series, charge detection table (9) of connecting again in the middle of wire; Side optical pickocff (4) and acoustic sensor (5) are arranged on a side of welding pool (7); In the laser path that convex lens (2) and axis optical sensor (3) level of being arranged on pass to; Half-reflecting mirror (12) to be arranged on directly over welding pool (7) and horizontal by miter angle; Inert protective gas (11) is sprayed along welding tip (10) inner side.
2. the laser soldering device carrying multiple sensor according to claim 1, is characterized in that: the wavelength of described laser (1) is 1.04 ~ 1.07 microns.
3. the laser soldering device carrying multiple sensor according to claim 1, is characterized in that: the pulse width of described laser (1) is 0.2 ~ 12 millisecond.
4. the laser soldering device carrying multiple sensor according to claim 1, is characterized in that: the pulse frequency of described laser (1) is 10 ~ 90 hertz.
5. the laser soldering device carrying multiple sensor according to claim 1, is characterized in that: the power density of described laser (1) is at 104 ~ 106 watts/square centimeter.
6. the laser soldering device carrying multiple sensor according to claim 1, is characterized in that: described inert protective gas (11) is argon gas.
7. the laser soldering device carrying multiple sensor according to claim 1, is characterized in that: 11 ~ 12 centimetres, the center of described acoustic sensor (5) distance welding pool (7).
8. the laser soldering device carrying multiple sensor according to claim 1, is characterized in that: 8 ~ 9 centimetres, the center of described side optical pickocff (4) distance welding pool (7).
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| CN109175684A (en) * | 2018-08-31 | 2019-01-11 | 金永和精工制造股份有限公司 | A kind of nickel-bass alloy material and stainless steel material laser welding process |
| CN112427793A (en) * | 2020-10-26 | 2021-03-02 | 宁波江丰电子材料股份有限公司 | Filling method for electron beam welding air holes |
| CN114576997A (en) * | 2022-03-02 | 2022-06-03 | 哈尔滨理工大学 | Laser heating system for silicon dioxide |
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| CN114576997A (en) * | 2022-03-02 | 2022-06-03 | 哈尔滨理工大学 | Laser heating system for silicon dioxide |
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| CN104999178B (en) | 2017-05-03 |
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Inventor after: Yu Jiali Inventor after: Ye Can Inventor before: Yue Rui Inventor before: Peng Anhua Inventor before: Deng Xiaolong Inventor before: Jin Qichun |
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Effective date of registration: 20170327 Address after: Guangdong province Dongguan city Changan town Shatou community Jinghai Road No. 129 Applicant after: CENXI DONGZHENG POWER TECHNOLOGY DEVELOPMENT CO., LTD. Address before: 214153 Jiangsu Province, Wuxi city Huishan District Road No. 12 Lotus Bridge money money Wuxi Urban Vocational College School of Internet of things Applicant before: Yue Rui |
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Effective date of registration: 20180612 Address after: 523000 Jinghai West Road, Sha tou Nan District, Changan Town, Dongguan, Guangdong Patentee after: Guangdong longhui Technology Co., Ltd. Address before: Guangdong province Dongguan city Changan town Shatou community Jinghai Road No. 129 Patentee before: CENXI DONGZHENG POWER TECHNOLOGY DEVELOPMENT CO., LTD. |
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