CN218694921U - Point-ring light beam laser welding gun - Google Patents
Point-ring light beam laser welding gun Download PDFInfo
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- CN218694921U CN218694921U CN202222934514.7U CN202222934514U CN218694921U CN 218694921 U CN218694921 U CN 218694921U CN 202222934514 U CN202222934514 U CN 202222934514U CN 218694921 U CN218694921 U CN 218694921U
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Abstract
The utility model provides a spot ring beam laser welding gun, which comprises a welding gun and a light path lens, wherein the light path lens comprises a collimating lens, a diffraction lens and a focusing lens which are arranged along the beam direction in sequence; the diffraction lens is fixedly arranged in the welding gun and is used for outputting the received collimated light beam into a beam of annular vortex light beam and a beam of circular parallel light beam; the focusing mirror is fixedly arranged in the welding gun and is used for outputting the received one-beam annular vortex light beam and the received one-beam circular parallel light beam into one-beam converged annular vortex light beam and one-beam converged spot light beam; the middle position of the diffraction lens is a circular plane mirror-shaped structure, and the outer edge position of the diffraction lens is a spiral phase plate-shaped structure. The utility model discloses a set up the diffraction lens into the compound lens of spiral phase place board with the plane lens, can form the more even annular vortex light beam of energy distribution and some spot light beam, effectively promoted the welding seam quality of device.
Description
Technical Field
The utility model relates to a laser welding technical field especially relates to a point ring light beam laser welding rifle.
Background
A laser welding gun is one of the essential components of laser welding, and it can realize efficient and beautiful welding joints by locally heating a material using a laser beam with high energy density, and has been widely used in the fields of manufacturing industry, electronic industry, and the like.
In order to adapt to different welding materials and improve the quality of laser welding, laser beams in various shapes are introduced, for example, the utility model with the publication number of CN213257671U discloses an optical system for forming a spot ring beam, the received laser beams can be output as the spot ring beam by arranging a collimating lens, a frustum-shaped optical deflection element and a focusing lens, when the laser welding is carried out, the welding materials are preheated and cleaned by utilizing the front half section of the ring beam, after the welding materials are heated and melted by the central round spot beam, the welding area is smoothly shaped and slowly cooled by utilizing the rear half section of the ring beam, so that the cladding quality and the aesthetic degree of a welding seam are improved, however, the energy distribution of the spot ring beam formed by the method is gradually reduced from the center to the edge, most of energy is concentrated in the central area, when the laser welding is carried out, the phenomenon of excessive ablation or splashing is easily caused, and the welding quality of the device is reduced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a point ring beam laser welding rifle can form the more even point ring beam of energy distribution, has effectively promoted the welding seam quality of device.
The technical scheme of the utility model is realized like this: the utility model provides a spot ring beam laser welding gun, which comprises a welding gun and a light path lens, wherein,
the light path lens comprises a collimating lens, a diffraction lens and a focusing lens which are sequentially arranged along the direction of the light beam;
the collimating lens is fixedly arranged in the welding gun and is used for collimating the light beam emitted by the laser;
the diffraction lens is fixedly arranged in the welding gun and is used for outputting the received collimated light beam into a beam of annular vortex light beam and a beam of circular parallel light beam;
the focusing mirror is fixedly arranged in the welding gun and is used for outputting the received one-beam annular vortex light beam and the received one-beam circular parallel light beam into one-beam converged annular vortex light beam and one-beam converged spot light beam;
the middle position of the diffraction lens is a circular plane mirror-shaped structure, and the outer edge position of the diffraction lens is a spiral phase plate-shaped structure.
On the basis of the technical scheme, preferably, the welding gun comprises a gun barrel main body and a movable microscope base, wherein the movable microscope base is arranged in the gun barrel main body, and the movable microscope base is rotatably connected with the gun barrel main body.
It is further preferred that there are two of the diffractive optic, and that the two diffractive optic are co-directional and co-axial.
Further preferably, the two diffraction lenses are respectively fixedly arranged in the gun barrel main body and the movable lens base.
Still further preferably, the rotating angle of the movable microscope base is 0-180 degrees.
Further preferably, the welding gun further comprises an optical fiber connector, and the optical fiber connector is fixedly arranged at one end, close to the collimating mirror, of the gun barrel main body.
Further preferably, the welding gun further comprises an air knife, and the air knife is fixedly arranged at one end, close to the focusing mirror, of the gun barrel main body.
On the basis of the above technical solution, preferably, the optical path lens further includes two protective lenses, the protective lenses are fixedly disposed in the welding gun, and the two protective lenses are respectively located on the light beam receiving side of the collimating lens and the light beam output side of the focusing lens.
On the basis of the above technical solution, preferably, the surface of the optical path lens is plated with an antireflection film.
More preferably, the material of the protective glasses is Corning 7980 quartz.
The utility model discloses a point ring light beam laser welding rifle has following beneficial effect for prior art:
(1) By arranging the diffraction lens as a composite lens of the spiral phase plate and the plane lens, an annular vortex beam and a spot beam with more uniform energy distribution can be formed, and the welding seam quality of the device is effectively improved;
(2) By arranging two diffraction lenses and fixedly arranging one diffraction lens on the movable lens base, the size of the annular vortex light beam can be adjusted by rotating the movable lens base, so that the device can adapt to different welding seams, and the application range of the device is expanded;
(3) Through setting up diffraction lens middle part position into plane mirror form structure, at the installation of diffraction lens and rotate the adjusting process, utilize its both sides plane structure and welder mounted position's cooperation, can conveniently carry out quick calibration to the position of diffraction lens, made things convenient for the use of device.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is an internal cross-sectional view of a spot ring beam laser welding gun according to the present invention;
FIG. 2 is a cross-sectional view of the interior of a torch of a spot ring beam laser welding gun according to the present invention;
FIG. 3 is a schematic diagram of the optical path of a spot-ring beam laser welding gun according to the present invention in a state where a diffraction lens is used;
FIG. 4 is a schematic diagram of the optical path of a spot-ring beam laser welding gun according to the present invention in a state using two diffractive lenses;
FIG. 5 is a perspective view of the light beam receiving side of the diffractive optic of the spot ring laser welding gun of the present invention;
FIG. 6 is a perspective view of the light beam output side of the diffraction lens of the spot-ring laser welding gun of the present invention;
fig. 7 is a schematic view of a spot ring beam formed by the spot ring beam laser welding gun of the present invention.
Wherein: 1. a welding gun; 11. a barrel body; 12. a movable lens base; 13. an optical fiber splice; 14. an air knife; 2. an optical path lens; 21. a collimating mirror; 22. a diffractive optic; 23. a focusing mirror; 24. and (4) protective glasses.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work all belong to the protection scope of the present invention.
As shown in fig. 1-7, the spot-ring beam laser welding gun of the present invention includes a welding gun 1 and a light path lens 2.
As a preferred embodiment, the welding gun 1 comprises a gun barrel main body 11 and a movable lens base 12, wherein the movable lens base 12 is arranged in the gun barrel main body 11, and the movable lens base 12 is rotatably connected with the gun barrel main body 11; the lens can be installed in the movable lens base 12, and the lens can be rotated by rotating the movable lens base 12 to adjust the installation angle of the lens.
Furthermore, the welding gun 1 further comprises an optical fiber connector 13, and the optical fiber connector 13 is fixedly arranged at one end of the gun barrel main body 11 close to the collimating mirror 21; the fiber connector 13 is used to communicate with the laser and provide a light source for the device.
Furthermore, the welding gun 1 further comprises an air knife 14, and the air knife 14 is fixedly arranged at one end of the gun barrel main body 11 close to the focusing mirror 23; by arranging the air knife 14, when the material is welded, the air knife 14 can be used for blowing air to the surface of the material so as to carry out dewatering and dust removing operation on the welding position of the material.
The light path lens 2 comprises a collimating lens 21, a diffraction lens 22 and a focusing lens 23 which are sequentially arranged along the light beam direction; the collimating mirror 21 is fixedly arranged in the welding gun 1 and is used for collimating the light beam emitted by the laser; the diffraction lens 22 is fixedly arranged in the welding gun 1, the middle position of the diffraction lens 22 is in a circular plane mirror-shaped structure, and the outer edge position of the diffraction lens 22 is in a spiral phase plate-shaped structure and is used for outputting the received collimated light beam into an annular vortex light beam and a circular parallel light beam; the focusing mirror 23 is fixedly arranged in the welding gun 1 and is used for outputting the received one annular vortex light beam and the received one round parallel light beam into one gathered annular vortex light beam and one gathered point light beam; as shown in fig. 3-6, the outer edge of the diffraction lens 22 is a spiral phase plate structure, the optical thickness of the position is proportional to the rotation of the azimuth angle, when the light beam passes through the outer edge of the diffraction lens 22, the spiral step structure is used to make the change amount of the optical path of the transmitted light beam different, i.e. the change amount of the phase of the transmitted light beam is different, a spiral phase factor with a set topological number is attached to the laser beam, so as to form an annular vortex light beam, and because the middle position of the diffraction lens 22 is a plane mirror structure, when the light beam passes through the middle position of the diffraction lens 22, the light beam direction does not change, a circular parallel light beam is formed, therefore, after the light beam passes through the whole diffraction lens 22, a combined light beam of the annular vortex light beam and the circular parallel light beam is formed, and after the combined light beam is focused by the focusing mirror 23, the spot ring light beam shown in fig. 7 is formed; because the energy distribution of the annular vortex beam is more uniform, the phenomenon of excessive ablation or splashing can not be caused during laser welding, thereby improving the welding quality of the device; meanwhile, the middle position of the diffraction lens 22 is in a plane mirror-like structure, so that the position of the diffraction lens 22 can be conveniently calibrated in the installation and adjustment processes.
In a preferred embodiment, two diffraction lenses 22 are provided, and the two diffraction lenses 22 are arranged in the same direction and coaxially; by arranging the two diffraction mirrors 22, the fixed angle difference of the two diffraction mirrors 22 can be adjusted by rotating one of the two diffraction mirrors 22, so that the diffraction mirror 22 adjusts the phase change amount of the transmitted light beam, changes the number of turns of the optical phase twist, and adjusts the size of the annular vortex light beam.
Furthermore, the two diffraction lenses 22 are respectively fixedly arranged in the gun barrel main body 11 and the movable lens base 12; by installing one diffraction lens 22 on the gun barrel main body 11 and installing the other diffraction lens 22 on the movable lens base 12, the angle difference of the two diffraction lenses 22 can be adjusted by utilizing the rotation of the movable lens base 12, thereby facilitating the use of the device.
Furthermore, the rotation angle of the movable mirror base 12 is 0 to 180 degrees; the movable mirror base 12 can be adjusted to the initial position and the end position by limiting the rotation angle of the movable mirror base 12, so that the use convenience of the device is improved.
As a preferred embodiment, the optical path lens 2 further includes two protective lenses 24, the protective lenses 24 are fixedly disposed in the welding gun 1, and the two protective lenses 24 are respectively disposed on the light beam receiving side of the collimating lens 21 and the light beam output side of the focusing lens 23; through set up protective glass 24 in that the device is inside, not only can prevent external article fish tail collimating mirror 21 or focus mirror 23, can also seal up collimating mirror 21, diffraction lens 22 and focus mirror 23 and keep to prevent that external impurity adhesion is on the surface of each lens, thereby promoted the barrier propterty of device.
Furthermore, to improve the structural strength of the protective glass 24, the material thereof may be selected from corning 7980 quartz.
As a preferred embodiment, the surface of the optical path lens 2 is plated with an antireflection film, which can reduce or eliminate the reflected light of the laser beam on the optical path lens 2, and improve the utilization rate of the laser beam.
The utility model discloses a use method of point ring light beam laser welding rifle as follows:
when the device is used, the optical fiber connector 13 is firstly communicated with an external laser, the air knife 14 is communicated with an external wind power conveying device, then the size of a point ring light beam formed by the device is adjusted by rotating the movable lens base 12, and finally the welding gun 1 is held by hand to weld materials.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A spot-ring beam laser welding gun comprises a welding gun (1) and a light path lens (2),
the light path lens (2) comprises a collimating lens (21), a diffraction lens (22) and a focusing lens (23) which are sequentially arranged along the light beam direction;
the collimating lens (21) is fixedly arranged in the welding gun (1) and is used for collimating beams emitted by a laser;
the diffraction lens (22) is fixedly arranged in the welding gun (1) and is used for outputting the received collimated light beam into an annular vortex light beam and a round parallel light beam;
the focusing mirror (23) is fixedly arranged in the welding gun (1) and is used for outputting a received annular vortex light beam and a received round parallel light beam into a gathered annular vortex light beam and a gathered point light beam;
the method is characterized in that: the middle position of the diffraction lens (22) is a circular plane mirror-shaped structure, and the outer edge position of the diffraction lens (22) is a spiral phase plate-shaped structure.
2. The spot ring beam laser welding gun of claim 1, wherein: the welding gun (1) comprises a gun barrel main body (11) and a movable microscope base (12), wherein the movable microscope base (12) is arranged in the gun barrel main body (11), and the movable microscope base (12) is rotationally connected with the gun barrel main body (11).
3. The spot ring beam laser welding gun of claim 2, wherein: the number of the diffraction lenses (22) is two, and the two diffraction lenses (22) are arranged in the same direction and coaxially.
4. A spot ring beam laser welding gun as defined in claim 3, wherein: the two diffraction lenses (22) are respectively and fixedly arranged in the gun barrel main body (11) and the movable lens base (12).
5. The spot ring beam laser welding gun of claim 4, wherein: the rotation angle of the movable microscope base (12) is 0-180 degrees.
6. The spot ring beam laser welding gun of claim 2, wherein: the welding gun (1) further comprises an optical fiber connector (13), and the optical fiber connector (13) is fixedly arranged at one end, close to the collimating mirror (21), of the gun barrel body (11).
7. The spot ring beam laser welding gun of claim 2, wherein: the welding gun (1) further comprises an air knife (14), and the air knife (14) is fixedly arranged at one end, close to the focusing mirror (23), of the gun barrel main body (11).
8. The spot ring beam laser welding gun of claim 1, wherein: the light path lens (2) further comprises two protective glasses (24), the protective glasses (24) are fixedly arranged in the welding gun (1), and the two protective glasses (24) are respectively positioned on the light beam receiving side of the collimating lens (21) and the light beam output side of the focusing lens (23).
9. The spot ring beam laser welding gun of claim 1, wherein: and the surface of the light path lens (2) is plated with an antireflection film.
10. The spot ring beam laser welding gun of claim 8, wherein: the protective glasses (24) are made of Kangning 7980 quartz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222934514.7U CN218694921U (en) | 2022-11-04 | 2022-11-04 | Point-ring light beam laser welding gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222934514.7U CN218694921U (en) | 2022-11-04 | 2022-11-04 | Point-ring light beam laser welding gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218694921U true CN218694921U (en) | 2023-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222934514.7U Active CN218694921U (en) | 2022-11-04 | 2022-11-04 | Point-ring light beam laser welding gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218694921U (en) |
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2022
- 2022-11-04 CN CN202222934514.7U patent/CN218694921U/en active Active
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