CN114131189A - Annular laser welding device and method - Google Patents
Annular laser welding device and method Download PDFInfo
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- CN114131189A CN114131189A CN202111256677.8A CN202111256677A CN114131189A CN 114131189 A CN114131189 A CN 114131189A CN 202111256677 A CN202111256677 A CN 202111256677A CN 114131189 A CN114131189 A CN 114131189A
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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
- B23K26/21—Bonding by welding
-
- 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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
-
- 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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
- B23K26/0648—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms comprising lenses
-
- 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
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/073—Shaping the laser spot
- B23K26/0734—Shaping the laser spot into an annular shape
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses an annular laser welding device and a method, wherein laser emitted by a fiber laser sequentially passes through a collimator, a beam expander, an annular optical lens, a first spectroscope, a second spectroscope, a laser vibrating mirror and a focusing mirror to act on a welding workpiece; after laser passes through the annular optical lens, the light beam is converted into annular distribution from Gaussian distribution; the invention avoids the situation that the welding workpiece is damaged due to overhigh central temperature of the welding spot when the laser is in Gaussian distribution; meanwhile, the diameter of the welding laser spot is further adjusted by adjusting the width of the annular light beam by using annular light lenses with different topological numbers, so that the parameters of the welding laser spot can be adjusted according to different materials and the thicknesses of welding workpieces to ensure the welding quality; according to the invention, the infrared temperature sensor and the image acquisition device are arranged at the same time, so that the welding point temperature and the image of the welding point position can be monitored.
Description
Technical Field
The invention relates to the field of laser welding, in particular to an annular laser welding device and method.
Background
In the industrial field, laser welding is increasingly widely applied, and the laser beam of the traditional laser welding is generally in Gaussian distribution; under the condition that the laser beam is in Gaussian distribution, the temperature of the center of a welding spot is too high, so that splashing is easily generated in the welding process to damage electronic elements around the welding spot of a welding workpiece; meanwhile, since the welding process is unevenly heated, the welded workpiece is deformed under the condition that the welded workpiece is thin.
The invention patent with publication number CN 112643199 a discloses an annular light laser welding device, which uses a cone lens to refract a parallel light beam into an annular light beam, a focusing mirror focuses the annular light beam to form a focused light beam, and the focused light beam is reflected by a reflecting surface and bypasses the shielding of a protruding part to form a focused circular ring at a welding seam; the reflector is provided with a reflecting surface, and the reflecting surface is used for changing the direction of the focused light beam so as to change the position of the focal plane; at least one of the cone lens and the focusing lens can move axially, the process is complicated, and the width of a circular ring of the annular light is not adjustable.
Disclosure of Invention
The invention aims to solve the defects of the traditional laser welding and provides an annular laser welding device and method.
In order to realize the purpose, the technical scheme of the invention is as follows:
an annular laser welding device comprises an optical fiber laser, a collimator, a beam expander, an annular optical lens, a laser vibrating mirror and a focusing mirror;
the optical fiber laser is used for generating laser;
a collimator is arranged on an output light path of the fiber laser and used for adjusting divergent laser emitted by the fiber laser into collimated parallel light;
a beam expander is arranged on an output light path of the collimator and used for expanding and amplifying the collimated parallel laser beams output by the collimator;
an annular optical lens is arranged on an output light path of the beam expanding lens, a laser beam passes through the center of the annular optical lens, and the annular optical lens is used for converting the laser beam with Gaussian distribution generated by the fiber laser into an annular beam;
the annular light beam passing through the annular light lens is transmitted to a laser galvanometer, and the laser galvanometer is used for adjusting the position and the motion track of a laser spot;
a focusing mirror is arranged on the output light path of the laser galvanometer;
laser emitted by the fiber laser sequentially passes through the collimator, the beam expanding lens, the annular optical lens, the laser vibrating lens and the focusing lens, and is focused by the focusing lens to act on a workpiece to be welded.
Further, the annular optical lens is a ring optical lens with multiple topological numbers.
Further, the number of the annular optical lenses is one or more.
Furthermore, the welding device also comprises a spectroscope which is arranged on an output light path of the annular light lens; the annular light beam passing through the annular light lens is output to the spectroscope; the annular light beam transmitted from the spectroscope is output to the laser galvanometer.
Further, the spectroscope comprises a first spectroscope and a second spectroscope; the ring beam passing through the ring optical lens is output to the first beam splitter, the ring beam transmitted from the first beam splitter is output to the second beam splitter, and the ring beam transmitted from the second beam splitter is output to the laser galvanometer.
Furthermore, one surface of each of the first light splitter and the second light splitter is plated with a 635nm red light semi-reflective and semi-transparent dielectric film.
Furthermore, the welding device also comprises an infrared temperature sensor arranged in the welding device, the center of the infrared temperature sensor and the center of the optical fiber laser are on the same horizontal plane, and the infrared temperature sensor is used for measuring the temperature of the welding spot position reflected by the second spectroscope.
Furthermore, the welding device also comprises an image acquisition device arranged in the welding device, the image acquisition device is a CCD camera, and the center of the image acquisition device and the center of the optical fiber laser are positioned on the same horizontal plane and used for acquiring images of the welding spot position reflected by the first spectroscope.
The welding method by using the annular laser welding device comprises the following steps:
the method comprises the following steps: fixing a welding workpiece on a welding fixture;
step two: adjusting parameters of the two-dimensional platform and the lifting platform for setting the defocusing amount of the laser and the diameter of a laser spot;
step three: adjusting the width of the annular light beam by using annular light lenses with different topological numbers or increasing or decreasing the number of the annular light lenses in the light path;
step four: setting continuous welding patterns, adjusting the coordinates of the welding patterns, and moving the two-dimensional platform to enable the laser to act on a welding processing position;
step five: setting the laser welding power to 450W, the laser pulse width to be 1-5 ms, the frequency to be 1-200 HZ, the scanning times of the galvanometer of each welding point to be one time, and adjusting the galvanometer to enable the laser speed to be 1-500 mm/s.
Step six: triggering laser, and welding the welding area through annular light;
step seven: and after welding, closing the laser, and cooling the welding workpiece to form a welding spot.
Further, the defocusing amount in the second step is 0-3mm, and the diameter of the laser spot is 100-; the widths of the three annular beams are 100-200 μm.
The invention has the beneficial effects that:
1. the laser beam with Gaussian distribution is converted into the light beam with annular distribution through the diffraction of the annular optical lens, the central temperature of a welding spot is easily overhigh due to the Gaussian distribution of the laser beam, so that splashing is generated in the welding process, and the welding part is damaged due to uneven heating of the welding part.
2. The annular optical lenses with different topological numbers are used in the invention, and the width of the annular light beam can be adjusted by using the annular optical lenses with different topological numbers or increasing and decreasing the number of the annular optical lenses in the light path, so that the diameter of the laser spot is adjusted, the parameters of the laser welding spot can be adjusted according to the material and the thickness of a welding workpiece, and the welding quality is further ensured.
3. According to the invention, the infrared temperature sensor and the image acquisition device are arranged in the welding device at the same time, so that the temperature and the welding condition of a welding position can be monitored in real time, and the welding quality can be ensured.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention.
FIG. 2 is a diagram showing the effect of laser beam energy distribution.
FIG. 3 is a schematic diagram of the laser beam energy distribution.
Fig. 4 is a graph comparing the laser welding effect of the ring light and the gaussian light in embodiment 1.
FIG. 5 is a 3D display of the annular solder bumps in embodiment 1
FIG. 6 shows a seam weld representation of the continuous weld of embodiment 2.
In the figure: the system comprises a fiber laser 1, a collimator 2, a beam expander 3, an annular optical lens 4, a first spectroscope 5, a second spectroscope 6, a laser galvanometer 7, a focusing mirror 8, an infrared temperature sensor 9, an image acquisition device 10 and an annular light beam schematic diagram 11 output after focusing.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described with reference to the accompanying drawings.
The utility model provides an annular laser welding device, includes casing, fiber laser 1, collimater 2, beam expanding mirror 3, annular optical lens 4, first spectroscope 5, second spectroscope 6, laser galvanometer 7, focusing mirror 8, infrared temperature sensor 9, image acquisition device 10.
The fiber laser 1, the collimator 2, the beam expander 3, the annular optical lens 4, the first spectroscope 5, the second spectroscope 6, the laser galvanometer 7, the focusing mirror 8, the infrared temperature sensor 9 and the image acquisition device 10 are all arranged in the shell, and other accessories such as the shell are of conventional structures, which are not described in detail herein.
Because the red light has the best effect of irradiating metal, an annular light source is arranged near the position of the welding workpiece and used as illumination in machine vision, and the annular light source for illumination outputs 635nm red light.
The optical fiber laser 1 is used for generating a light source, the optical fiber laser 1 is an infrared laser, laser parameters are 800nm-1200nm, the average power is 450W, the peak power is 50-4500W, the highest single pulse energy is 45J, the factor of the beam quality M2 is less than or equal to 1.3, the minimum pulse width is 1ms, the pulse width of the emitted laser is 1-30 ms, and the light emitting frequency is 1 Hz-500 Hz.
As shown in fig. 1, laser light emitted by a fiber laser 1 passes through a collimator 2, a beam expander 3, an annular optical lens 4, a first beam splitter 5, a second beam splitter 6, a laser galvanometer 7, and a focusing lens 8 in sequence.
A collimator 2 is arranged on an output optical path of the optical fiber laser 1, and the collimator 2 is used for adjusting divergent laser emitted by the optical fiber laser 1 into collimated parallel light;
a beam expanding lens 3 is arranged on an output light path of the collimator 2, and the beam expanding lens 3 is used for expanding and amplifying collimated parallel laser beams output by the collimator;
an annular optical lens 4 is arranged on the output light path of the beam expander 3;
the infrared laser is output from the beam expander 3 to the annular optical lens 4 and passes through the center of the annular optical lens 4, after the light beam passes through the annular optical lens 4, the light beam distribution is converted from Gaussian distribution to annular light beam distribution, the width of the annular light beam is 100 and 200 mu m, and the annular light beam is vortex light beam.
The annular optical lens 4 is a multi-topology annular optical lens, and the topology number of each annular optical lens can be any one of 2, 3, 4, 5, 6, 7 and 8; one or more annular optical lenses can be arranged on the light path, the annular optical lenses form an annular optical lens group, and the topological number of the annular optical lens group can be increased or decreased between 2 and 31; the number of the annular light lenses in the annular light lens group can be increased or decreased by using the annular light lenses with different topological numbers or increasing or decreasing the number of the annular light lenses in the annular light lens group, so that the width of the annular light beam ring can be increased or decreased.
The laser beam with Gaussian distribution is converted into annular distribution, the central temperature of a welding spot is reduced by changing the light intensity distribution of light spots, the steam pressure of a keyhole is controlled by reducing the central keyhole temperature of the welding spot, and the generation of splashing is reduced; by increasing the temperature of the liquid metal around the keyhole, the resistance of steam removal is reduced, and splashing is reduced.
In the present invention, an effect diagram of an energy distribution pattern of a ring laser beam is shown in fig. 2, a schematic diagram of an energy distribution pattern of a ring laser beam is shown in fig. 3, a comparison diagram of laser welding effects by a ring light and a gaussian light is shown in fig. 4, fig. 5 is a diagram showing a 3D view of a ring light spot welding, and fig. 6 is a diagram showing a seam welding of a ring light continuous welding.
As shown in fig. 1, the first beam splitter 5 and the second beam splitter 6 form an included angle of 45 degrees with the laser light path, the beam splitter is a semi-reflective and semi-transparent lens and can transmit 800-.
The annular light beam passing through the annular light lens 4 is output to a first spectroscope 5, the annular light beam transmitted by the first spectroscope 5 is output to a second spectroscope 6, the annular light beam transmitted by the second spectroscope 6 is output to a laser galvanometer 7, and the laser galvanometer 7 is used for adjusting the position and the motion track of an annular laser spot transmitted by the second spectroscope 6; a focusing mirror 8 is arranged on the output light path of the laser galvanometer 7, and the annular light beam output by the laser galvanometer 7 is focused by the focusing mirror 8 and acts on a workpiece to be welded; the schematic diagram of the ring beam output after focusing is shown as 11, and the laser spot diameter after being focused by the focusing mirror 8 is 100-500 μm.
In the invention, an infrared temperature sensor 9 and an image acquisition device 10 are arranged in a shell through a machining piece; the image acquisition device 10 is a CCD camera; in specific implementation, the optical fiber laser 1, the collimator 2, the beam expander 3, the annular optical lens 4, the first spectroscope 5, the second spectroscope 6, the laser vibrating mirror 7 and the focusing mirror 8 are arranged inside the first shell; the infrared temperature sensor 9 and the image acquisition device 10 are arranged outside the first shell; the whole first shell, the infrared temperature sensor 9 and the image acquisition device 10 are arranged in the second shell together;
the centers of the infrared temperature sensor 9, the image acquisition device 10 and the fiber laser 1 are on the same horizontal plane, and the temperature sensor 9, the image acquisition device 10 and the fiber laser 1 are coaxially arranged; the temperature sensor 9 and the image acquisition device 10 are connected with an external computer, and data acquired by the temperature sensor 9 and the image acquisition device 10 are acquired in real time through the computer;
according to the invention, through 635nm red light illumination, an image at a welding point position is transmitted by a focusing mirror 8, the focusing mirror 8 transmits the image at the welding point position and outputs the image to a laser vibrating mirror 7, and the image is reflected to a second beam splitter 6 by two reflectors of the laser vibrating mirror, a 635nm red light semi-reflecting and semi-transmitting dielectric film is plated on the right side of the second beam splitter 6 in the figure 1, an image reflected light beam at the welding point position is divided into two light beams by the second beam splitter 6, and one light beam is transmitted to a first beam splitter 5; the other light beam is reflected by the second beam splitter 6 and transmitted to the infrared temperature sensor 9, the infrared temperature sensor 9 measures the temperature of the welding point position output after the welding point position is reflected by the second beam splitter 6, the energy loss of the light beam in transmission is considered, the temperature of the welding point position output after the infrared temperature sensor 9 measures the temperature of the welding point position output after the light beam is reflected by the second beam splitter 6 is different from the actual temperature of the welding point position, the temperature of the welding point position can be obtained in real time through the infrared temperature sensor 9 by adjusting according to a certain proportionality coefficient through software, and if the temperature of the welding point position is abnormal, the fault can be reported through the software, so that the damage of a workpiece to be welded caused by the abnormal temperature in the welding process is prevented.
After a light beam of the second beam splitter 6 is transmitted to the first beam splitter 5, a 635nm red light semi-reflective semi-transparent dielectric film is also plated on the right side of the first beam splitter 5 in fig. 1, an image reflected light beam at a welding point position is reflected by the first beam splitter 5, part of the reflected light beam of the image at the welding point position is transmitted to the image acquisition device 10, the image acquisition device 10 acquires the image at the welding point position output after being reflected by the first beam splitter 5, and the welding condition of the welding point position can be monitored in real time through an external computer connected with the image acquisition device 10.
In the invention, a first shell comprises a first opening and a second opening, a first spectroscope 5 corresponds to the first opening, and an image acquisition device 10 acquires a welding spot position image output after being reflected by the first spectroscope 5 through the first opening; the second spectroscope 6 corresponds to a second opening, and the infrared temperature sensor 9 collects the image temperature of the welding spot position output after being reflected by the second spectroscope 6 through the second opening;
the optical filters are arranged between the first opening and the image acquisition device 10 and between the second opening and the infrared temperature sensor 9 through the machining piece, and the infrared laser is filtered by the optical filters, so that errors in the process of acquiring data by the infrared temperature sensor 9 and the image acquisition device 10 due to the infrared laser are prevented.
In the invention, the welding workpiece is made of metal such as copper, gold and the like.
The method for welding by the annular laser welding device comprises the following steps:
the method comprises the following steps: fixing a welding workpiece on a welding fixture;
step two: adjusting parameters of the two-dimensional platform and the lifting platform for setting the defocusing amount of the laser and the diameter of a laser spot;
adopting a computer to control a board card and laser welding software, adjusting the two-dimensional platform and the lifting platform to test that the laser is strongest, taking the position with the smallest light spot as a focus, and adjusting the lifting platform to enable the defocusing amount of the laser to be 0-3mm and the light spot of the laser to be 500 mu m;
step three: adjusting the annular optical lens 4, and adjusting the width of the annular light beam to be 100-200 μm by using annular optical lenses with different topological numbers or increasing or decreasing the number of the annular optical lenses in the light path;
the width of the annular light beam can be adjusted by using the annular light lenses with different topological numbers or increasing and decreasing the number of the annular light lenses in the light path, so that the diameter of the laser spot is adjusted, the parameters of the laser welding spot can be adjusted according to the material and the thickness of a welding workpiece, and the welding quality is further ensured.
Step four: setting a welding pattern, adjusting the coordinates of the welding pattern, and moving the two-dimensional platform to enable the laser to act on a welding processing position;
step five: setting the laser welding power to 450W, the laser pulse width to be 1-5 ms, the frequency to be 1-200 HZ, the scanning times of the galvanometer of each welding point to be one time, and adjusting the galvanometer to enable the laser speed to be 1-500 mm/s.
Step six: triggering laser, and welding the welding area through annular light;
step seven: and after welding, closing the laser, and cooling the welding workpiece to form a welding spot.
Finally, it should be noted that: while the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that various changes in the form and details may be made therein without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "left", "right", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Claims (10)
1. An annular laser welding device comprises an optical fiber laser (1), and is characterized by further comprising a collimator (2), a beam expander (3), an annular optical lens (4), a laser vibrating mirror (7) and a focusing mirror (8);
the optical fiber laser (1) is used for generating laser;
a collimator (2) is arranged on an output light path of the optical fiber laser (1), and the collimator (2) is used for adjusting divergent laser emitted by the optical fiber laser (1) into collimated parallel light;
a beam expanding lens (3) is arranged on an output light path of the collimator (2), and the beam expanding lens (3) is used for expanding and amplifying collimated parallel laser beams output by the collimator;
an annular optical lens (4) is arranged on an output light path of the beam expander (3), a laser beam passes through the center of the annular optical lens (4), and the annular optical lens (4) is used for converting the laser beam with Gaussian distribution generated by the optical fiber laser (1) into an annular beam;
the annular light beam passing through the annular light lens (4) is transmitted to a laser galvanometer (7), and the laser galvanometer (7) is used for adjusting the position and the motion track of a laser spot;
a focusing mirror (8) is arranged on the output light path of the laser galvanometer (7);
laser emitted by the fiber laser (1) sequentially passes through the collimator (2), the beam expander (3), the annular optical lens (4), the laser vibrating mirror (7) and the focusing mirror (8), and is focused on a workpiece to be welded through the focusing mirror (8).
2. The laser welding apparatus according to claim 1, wherein the annular optical lens (4) is a multi-topology annular optical lens.
3. The laser welding device according to claim 1, characterized in that said annular optical lens (4) is one or more.
4. The ring laser welding apparatus as claimed in claim 1, wherein said welding apparatus further comprises a beam splitter disposed in an output optical path of the ring optical lens (4); the annular light beam passing through the annular light lens (4) is output to the spectroscope; the annular light beam transmitted from the spectroscope is output to a laser galvanometer (7).
5. The laser ring welding device according to claim 1 or 4, characterized in that said beam splitter comprises a first beam splitter (5) and a second beam splitter (6); the ring beam passing through the ring light lens (4) is output to a first beam splitter (5), the ring beam transmitted from the first beam splitter (5) is output to a second beam splitter (6), and the ring beam transmitted from the second beam splitter (6) is output to a laser galvanometer (7).
6. The ring laser welding device according to claim 5, characterized in that one of the first beam splitter (5) and the second beam splitter (6) is coated with 635nm red light semi-reflecting and semi-transmitting dielectric film.
7. The laser ring welding apparatus according to claim 1, wherein the welding apparatus further comprises an infrared temperature sensor (9) disposed inside the welding apparatus, the center of the infrared temperature sensor (9) is located on a horizontal plane with the center of the fiber laser (1), and the image pickup device (9) is configured to measure the temperature of the spot location reflected by the second beam splitter (6).
8. The ring laser welding apparatus according to claim 1, wherein the welding apparatus further comprises an image pickup device (10) disposed inside the welding apparatus, the image pickup device (10) is a CCD camera, the center of the image pickup device (10) is located on a horizontal plane with the center of the fiber laser (1), and the image pickup device (10) is configured to pick up an image of the position of the welding spot reflected by the first beam splitter (5).
9. A method of welding using the annular laser welding apparatus of claim 1, comprising the steps of:
the method comprises the following steps: fixing a welding workpiece on a welding fixture;
step two: adjusting parameters of the two-dimensional platform and the lifting platform for setting the defocusing amount of the laser and the diameter of a laser spot;
step three: adjusting the width of the annular light beam by using annular light lenses with different topological numbers or increasing or decreasing the number of the annular light lenses in the light path by adjusting the annular light lenses (4);
step four: setting a welding pattern, adjusting the coordinates of the welding pattern, and moving the two-dimensional platform to enable the laser to act on a welding processing position;
step five: setting the laser welding power to 450W, the laser pulse width to be 1-5 ms, the frequency to be 1-200 HZ, the scanning times of the galvanometer of each welding point to be one time, and adjusting the galvanometer to enable the laser speed to be 1-500 mm/s.
Step six: triggering laser, and welding the welding area through annular light;
step seven: and after welding, closing the laser, and cooling the welding workpiece to form a welding spot.
10. The ring laser welding method according to claim 9, wherein the defocusing amount in the second step is 0-3mm, and the laser spot diameter is 100-500 μm; the widths of the three annular beams are 100-200 μm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111256677.8A CN114131189A (en) | 2021-10-27 | 2021-10-27 | Annular laser welding device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111256677.8A CN114131189A (en) | 2021-10-27 | 2021-10-27 | Annular laser welding device and method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182605A (en) * | 2013-03-21 | 2013-07-03 | 常州镭赛科技有限公司 | Laser welding machine |
| KR20160019176A (en) * | 2014-08-11 | 2016-02-19 | 조국환 | Laser welding machine having a temperature control function |
| CN111338089A (en) * | 2020-01-16 | 2020-06-26 | 华中科技大学 | Optical system with annular light spots |
| CN112676702A (en) * | 2020-11-19 | 2021-04-20 | 武汉凌云光电科技有限责任公司 | Method and equipment for precise micro-welding of nonferrous metal by composite dual-wavelength |
-
2021
- 2021-10-27 CN CN202111256677.8A patent/CN114131189A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103182605A (en) * | 2013-03-21 | 2013-07-03 | 常州镭赛科技有限公司 | Laser welding machine |
| KR20160019176A (en) * | 2014-08-11 | 2016-02-19 | 조국환 | Laser welding machine having a temperature control function |
| CN111338089A (en) * | 2020-01-16 | 2020-06-26 | 华中科技大学 | Optical system with annular light spots |
| CN112676702A (en) * | 2020-11-19 | 2021-04-20 | 武汉凌云光电科技有限责任公司 | Method and equipment for precise micro-welding of nonferrous metal by composite dual-wavelength |
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