CN213570743U - Rectangular homogenized light spot laser cladding head - Google Patents
Rectangular homogenized light spot laser cladding head Download PDFInfo
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- CN213570743U CN213570743U CN202022304492.7U CN202022304492U CN213570743U CN 213570743 U CN213570743 U CN 213570743U CN 202022304492 U CN202022304492 U CN 202022304492U CN 213570743 U CN213570743 U CN 213570743U
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Abstract
The utility model discloses a rectangle homogenization facula laser cladding head, laser cladding head is including the light guide seat that has laser incident passageway, follow the collimating mirror group, first microlens array, second microlens array, first post focusing mirror, second post focusing mirror and the protective glass that laser incident passageway set gradually forward from the back to the front, and set up in the cladding processing head of light guide seat distal end, wherein, first microlens array includes a plurality of first microlenses of arranging with first direction array, second microlens array includes a plurality of second microlenses of arranging with second direction array; the first column focusing lens and the second column focusing lens are arranged in the orthogonal direction. The laser cladding head is simple in structure, cladding efficiency can be remarkably improved, cladding flatness is greatly improved, and the laser cladding head can be widely applied to laser cladding processing of the outer surfaces of various product parts.
Description
Technical Field
The utility model relates to a laser cladding field, concretely relates to rectangle homogenization facula laser cladding head.
Background
In the prior art, a linear belt type rectangular light spot integrating mirror is generally adopted for forming rectangular light spots, and the basic principle of the integrating mirror is to reflect input light spots in a segmented manner to obtain output light spots with the same position and size on a working surface for superposition, so that the homogenization and shaping effects are achieved. For the sectional linear belt type rectangular light spot integrating mirror, because of plane reflection, the size of an output light spot is approximately equal to the size of an input light spot divided by the number of separating sections, so that a large-size light spot cannot be obtained, and in addition, because incident laser is a Gaussian light spot, when the number of the separating sections is small, the obtained rectangular light spot is not a rectangular homogenized light spot, and the flatness of a laser cladding layer is poor when the sectional linear belt type rectangular light spot integrating mirror is used for laser cladding processing.
Disclosure of Invention
The utility model aims at providing a rectangle homogenization facula laser cladding head to obtain rectangle homogenization facula and be used for laser cladding processing.
In order to achieve the above purpose, the utility model adopts the technical scheme that: a rectangular homogenized light spot laser cladding head comprises a light guide seat with a laser incidence channel, a collimating lens group, a first micro lens array, a second micro lens array, a first column focusing lens, a second column focusing lens and a protective lens which are sequentially arranged along the laser incidence channel from back to front, and a cladding processing head arranged at the far end of the light guide seat, wherein the first micro lens array comprises a plurality of first micro lenses arrayed in a first direction, the second micro lens array comprises a plurality of second micro lenses arrayed in a second direction, and the first direction and the second direction are mutually perpendicular and are both perpendicular to the projection direction of laser in the laser incidence channel; the first column focusing lens and the second column focusing lens are arranged in the orthogonal direction.
Preferably, the first microlens has a first incident surface for receiving the laser beam, the second microlens has a second incident surface for receiving the laser beam, and the first incident surface and the second incident surface are both arc surfaces that are arched from front to back against the projected laser beam.
Preferably, the first cylindrical focusing lens has a first focusing surface, the second cylindrical focusing lens has a second focusing surface, and the first focusing surface and the second focusing surface are arc surfaces which are arched from back to front along the projection direction of the laser beam.
Preferably, an additional seat is additionally arranged beside the light guide seat, a camera for monitoring the processing condition below the cladding processing head is arranged on the additional seat, and a reflector group for reflecting the light beam in the laser incidence channel to the camera is further arranged between the additional seat and the light guide seat.
Furthermore, the reflector group comprises a reflection and transmission mirror arranged in the laser incidence channel and a reflector arranged on the additional seat, and the reflector has a reflecting surface which reflects the light beams projected from the light-emitting surface of the reflection and transmission mirror and projects the light beams to the camera.
Furthermore, the reflection and transmission mirror is arranged between the collimating mirror group and the first micro-lens array in the laser incidence channel.
Preferably, the cladding processing head comprises a light outlet nozzle which is attached to the far end of the light guide seat and is provided with a light outlet channel, and a powder feeding nozzle which is arranged on the outer side part of the light outlet nozzle.
Furthermore, the light-emitting nozzle is provided with four outer side surfaces which are connected along the circumferential direction, each outer side surface is an inclined surface which gradually extends towards the middle from back to front in an inclined manner, the number of the powder feeding nozzles is two, and the two powder feeding nozzles are respectively arranged on the outer sides of the two outer side surfaces which are opposite to each other.
Furthermore, each powder feeding nozzle is provided with a plurality of powder feeding channels which are distributed at intervals along the width direction of the powder feeding nozzle.
Because of above-mentioned technical scheme's application, compared with the prior art, the utility model have the following advantage: the utility model discloses a rectangle homogenization facula laser cladding head, its simple structure can convert circular facula into the rectangle facula of great size homogenization, traditional circular facula optical system relatively, and the cladding layer that the single cladding formed is wide a lot, can show and promote the efficiency of cladding, and the while cladding roughness also improves by a wide margin, can be used for the laser cladding processing of various product part surfaces extensively.
Drawings
Fig. 1 is a schematic view of the overall structure of the laser cladding head of the present invention;
FIG. 2 is a longitudinal sectional view of the laser cladding head of FIG. 1;
FIG. 3 is a longitudinal sectional view of the powder feeding nozzle in the laser cladding head of FIG. 1;
FIG. 4 is an exploded view of the laser cladding head of FIG. 1;
FIGS. 5a and 5b are schematic diagrams of a first focusing lens of the present invention;
fig. 6a and 6b are schematic diagrams of a second cylindrical focusing lens according to the present invention;
fig. 7 is a projection route diagram of a laser beam in the laser cladding head of the present invention;
wherein: 1. a light guide base; 101. a laser connector; 2. a collimating lens group; 3. a first microlens array; 4. a second microlens array; 5. a first cylindrical focusing lens; 51. a first focal plane; 6. a second cylindrical focusing mirror; 61. a second focal plane; 7. protective glasses; 8. an air knife; 9. a light outlet nozzle; 91. a light exit channel; 10. a powder feeding nozzle; 10a, a powder feeding channel; 11. an additional seat; 12. a camera; 13. a reflective transmissive mirror; 14. a mirror.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to 6b, the laser cladding head with the rectangular homogenized light spot comprises a light guide seat 1 with a laser incidence channel, and a cladding processing head arranged at the far end of the light guide seat 1, wherein a laser connector 101 is arranged at the near end of the light guide seat 1, and the laser connector 101 is provided with a QBH interface for connecting with a laser. Here, the near end and the far end are near ends which are close to a laser or an operator in the process of using the laser cladding head, and the ends are far ends on the contrary; the front and rear are defined by referring to the front and rear directions of the laser beam when transmitted along the laser incident channel, and specifically, the front and rear are projected from the rear.
The laser cladding head also comprises a collimating lens group 2, a first micro-lens array 3, a second micro-lens array 4, a first cylindrical focusing lens 5, a second cylindrical focusing lens 6 and a protective lens 7 which are sequentially arranged from back to front along a laser incidence channel of the light guide seat 1. Wherein:
the first microlens array 2 includes a plurality of first microlenses arranged in an array in a first direction, and the second microlens array 3 includes a plurality of second microlenses arranged in an array in a second direction, the first direction and the second direction being perpendicular to each other and to a projection direction of the laser light in the laser incident channel. The first micro lens is provided with a first incidence surface for receiving the laser beam, the second micro lens is provided with a second incidence surface for receiving the laser beam, and the first incidence surface and the second incidence surface are arc surfaces which are arched from front to back facing the projected laser beam.
The first cylindrical focusing mirror 5 and the second cylindrical focusing mirror 6 are arranged in an orthogonal direction, as shown in fig. 5a and 5 b; the first cylindrical focusing lens 5 has a first focusing surface 51, as shown in fig. 6a, 6 b; the second cylinder focusing lens 6 has a second focusing surface 61, and the first focusing surface 51 and the second focusing surface 61 are arc surfaces that are arched from the back to the front along the projected laser beam. Specifically, the first focusing plane 51 has a first arcuate arch extending in the radial direction of the first focusing cylinder 5, and the second focusing plane 61 has a second arcuate arch extending in the radial direction of the second focusing cylinder 6, the first arcuate arch and the second arcuate arch extending in the longitudinal direction perpendicular to each other.
So, the laser beam that sends from the laser instrument, earlier become parallel laser beam after collimating processing through collimating mirror group 2, again pass through first microlens array 3 in proper order, second microlens array 4, first post focusing mirror 5, second post focusing mirror 6 and protective glass 7, can change to vertical direction even, the horizontal direction is the rectangle facula of gauss distribution, and the size of rectangle facula can reach 15mm 3mm, traditional circular facula optical system relatively, the cladding layer width that the single cladding formed is many, cladding efficiency improves greatly. And the rectangular light spot is a homogenized light spot, and the energy density of each point in the light spot is the same, so that a smooth cladding layer can be formed when the rectangular light spot is coupled with powder.
The rectangular homogenization light spot optical system in the laser cladding head uses two groups of non-imaging microlens array homogenization systems. Each group of the non-imaging microlens array homogenizing system comprises a microlens array and a cylindrical focusing lens. The two groups of non-imaging micro-lens array homogenization systems are intersected with each other. A rectangular homogenizing spot is obtained according to the non-imaging microlens array homogenizing system. Fig. 7 shows the laser beam projection route and principle in the laser cladding head of the present invention, in the direction in the figure, the laser beam is emitted by the optical fiber, after being collimated by the collimator lens 2, the beam is divided into multiple sub-beams by the first micro-lens array 3, then the beam is further divided into multiple sub-beams by the vertical one-dimensional micro-lens array (the second micro-lens array 4), and then the beam is focused by the vertical focusing column lens (the first focusing column lens 5), so as to form a one-dimensional non-imaging micro-lens homogenization system, and a light spot with a certain width and uniform distribution is obtained on the back focal plane of the vertical focusing column lens; because the focal planes of the two cylindrical focusing lenses are overlapped on the working surface, light spots with uniformly distributed lengths are obtained after passing through the cylindrical focusing lens in the vertical direction and the cylindrical focusing lens in the horizontal direction (the second cylindrical focusing lens 6). Therefore, light spots uniformly distributed in both the length direction and the width direction can be obtained, and the bidirectional rectangular homogenization light spot optical system is formed. By selecting different parameters of the micro-lens array and the focusing lens, rectangular light spots with different lengths and widths can be obtained, wherein focal planes of the two cylindrical focusing lenses are overlapped on a working plane.
Referring to fig. 1 to 4, an additional base 11 is further attached beside the light guide base 1, a camera 12 for monitoring the processing condition below the cladding processing head is arranged on the additional base 11, and a reflector group for reflecting the light beam in the laser incident channel to the camera 12 is further arranged between the additional base 11 and the light guide base 1. Specifically, referring to fig. 2, the mirror group includes a reflective and transmissive mirror 13 disposed in the laser incident channel, and a reflective mirror 14 disposed on the additional base 11, the reflective and transmissive mirror 13 is disposed between the collimating mirror group 2 and the first microlens array 3 in the laser incident channel, and the reflective mirror 14 has a reflective surface for reflecting the light beam projected from the light emitting surface of the reflective and transmissive mirror 13 and projecting the light beam to the camera 12. In a specific arrangement, the extending direction of the observation channel of the camera 12 may be set to be parallel to the extending direction of the laser incident channel. Therefore, in the laser cladding processing process, the condition of the molten pool can be observed through the camera 12, so that the cladding parameters can be adjusted in time, and the effect of the cladding layer can be better ensured.
Referring to the drawings, the cladding processing head includes a light-emitting nozzle 9 attached to a distal end of the light guide 1 and having a light-emitting passage 91, and a powder feeding nozzle 10 disposed on an outer side portion of the light-emitting nozzle 9. Here, the light emitting nozzle 9 has four outer side surfaces connected along the circumferential direction, and each outer side surface is an inclined surface extending from the back to the front gradually to the middle in an inclined manner, that is, the cross section of the light emitting nozzle 9 is square and gradually decreases from the back to the front. The two powder feeding nozzles 10 are respectively arranged at the outer sides of two opposite outer side surfaces of the light outlet nozzle 9. Each powder feeding nozzle 10 is provided with a plurality of powder feeding channels 10a distributed at intervals along the width direction of the powder feeding nozzle, so that the powder fed out from the powder feeding nozzle 10 can be uniformly distributed to the positions to be processed on the surface to be processed, and laser cladding processing is performed on the powder and the laser beam in the light emergent channel 91.
The laser cladding head further comprises an air knife 8 which is arranged on the light guide seat 1 and is provided with an air outlet, the air knife 8 is positioned in front of the protective glass 8 and behind the light outlet nozzle 9, and therefore high-temperature scattered powder can be prevented from entering a laser incidence channel and damaging each lens.
When the laser cladding head is used for laser cladding processing of workpieces, the light guide seat 1 can be fixed on a component such as a manipulator, so that the laser cladding head is moved in the processing process.
To sum up, the utility model discloses a rectangle homogenization facula laser cladding head, its simple structure adopts this laser cladding head can convert circular facula into the rectangle facula of great size homogenization, and traditional circular facula optical system relatively, the cladding layer width that the single cladding formed is many, can show ground and promote the efficiency of cladding, and the while cladding roughness also improves by a wide margin.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (9)
1. The utility model provides a rectangle homogenization facula laser cladding head which characterized in that: the laser cladding head comprises a light guide seat with a laser incidence channel, a collimating lens group, a first micro lens array, a second micro lens array, a first column focusing lens, a second column focusing lens and a protective lens which are sequentially arranged along the laser incidence channel from back to front, and a cladding processing head arranged at the far end of the light guide seat, wherein the first micro lens array comprises a plurality of first micro lenses arrayed in a first direction, the second micro lens array comprises a plurality of second micro lenses arrayed in a second direction, and the first direction and the second direction are mutually perpendicular and are both perpendicular to the projection direction of laser in the laser incidence channel; the first column focusing lens and the second column focusing lens are arranged in the orthogonal direction.
2. The rectangular homogenized light spot laser cladding head according to claim 1, characterized in that: the first micro lens is provided with a first incidence surface for receiving laser beams, the second micro lens is provided with a second incidence surface for receiving the laser beams, and the first incidence surface and the second incidence surface are arc surfaces which are arched from front to back facing the projected laser beams.
3. The rectangular homogenized light spot laser cladding head according to claim 1, characterized in that: the first cylindrical focusing lens is provided with a first focusing surface, the second cylindrical focusing lens is provided with a second focusing surface, and the first focusing surface and the second focusing surface are arc surfaces which are arched from back to front along the projection direction of the laser beams.
4. The rectangular homogenized light spot laser cladding head according to claim 1, characterized in that: an additional seat is additionally arranged beside the light guide seat, a camera used for monitoring the processing condition below the cladding processing head is arranged on the additional seat, and a reflector group used for reflecting the light beams in the laser incidence channel to the camera is further arranged between the additional seat and the light guide seat.
5. The rectangular homogenized light spot laser cladding head according to claim 4, characterized in that: the reflector group comprises a reflection and transmission mirror arranged in the laser incidence channel and a reflector arranged on the additional seat, and the reflector is provided with a reflecting surface which reflects light beams projected from the light-emitting surface of the reflection and transmission mirror and then projects the light beams to the camera.
6. The rectangular homogenized light spot laser cladding head according to claim 5, characterized in that: the reflection and transmission mirror is arranged between the collimating mirror group and the first micro-lens array in the laser incidence channel.
7. The rectangular homogenized light spot laser cladding head according to claim 1, characterized in that: the cladding processing head is including the hookup at leaded light seat distal end just has the light-emitting nozzle of light-emitting channel, and sets up send powder nozzle on the light-emitting nozzle lateral part.
8. The rectangular homogenized light spot laser cladding head according to claim 7, characterized in that: the light-emitting nozzle is provided with four outer side surfaces which are connected along the circumferential direction, each outer side surface is an inclined surface which is inclined and extends from back to front to the middle gradually, the number of the powder feeding nozzles is two, and the two powder feeding nozzles are respectively arranged on the outer sides of the two outer side surfaces which are opposite to each other.
9. The rectangular homogenized light spot laser cladding head according to claim 8, characterized in that: each powder feeding nozzle is provided with a plurality of powder feeding channels which are distributed at intervals along the width direction of the powder feeding nozzle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022304492.7U CN213570743U (en) | 2020-10-16 | 2020-10-16 | Rectangular homogenized light spot laser cladding head |
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| CN202022304492.7U CN213570743U (en) | 2020-10-16 | 2020-10-16 | Rectangular homogenized light spot laser cladding head |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226761A (en) * | 2020-10-16 | 2021-01-15 | 苏州麦尔科唯激光机器人有限公司 | Rectangular homogenized light spot laser cladding head |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226761A (en) * | 2020-10-16 | 2021-01-15 | 苏州麦尔科唯激光机器人有限公司 | Rectangular homogenized light spot laser cladding head |
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