CN216126556U - Composite laser device for directional energy deposition equipment - Google Patents
Composite laser device for directional energy deposition equipment Download PDFInfo
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- CN216126556U CN216126556U CN202121980409.6U CN202121980409U CN216126556U CN 216126556 U CN216126556 U CN 216126556U CN 202121980409 U CN202121980409 U CN 202121980409U CN 216126556 U CN216126556 U CN 216126556U
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Abstract
The utility model discloses a composite laser device for directional energy deposition equipment; the laser processing device comprises a laser, a laser processing head and a laser processing head, wherein the laser comprises a first laser, a second laser and the laser processing head connected with the first laser; the laser of the first laser is transmitted to the first beam expanding collimating lens, the beam combining lens and the focusing lens in sequence, then is emitted from the light emitting hole of the nozzle and is focused on the processing plane as an infrared light spot; the laser of the second laser is transmitted to the second beam expanding collimating lens and the holophote in sequence, the holophote reflects the laser to the light combining lens, then the laser is reflected to the focusing lens by the light combining lens, finally the laser is emitted from the light outlet hole of the nozzle and focused on the processing plane to be used as a blue-green light spot; after the infrared light spot and the blue-green light spot are focused by the focusing lens, a composite laser light spot is formed on the processing plane; the infrared light spot is used for melting metal powder to form a molten pool, the blue-green light spot is beneficial to improving the stability of the molten pool, splashing is reduced, internal defects are reduced, and the forming quality of the workpiece is greatly improved.
Description
Technical Field
The utility model relates to the technical field of laser processing of high-reflection materials, in particular to a composite laser device for directional energy deposition equipment.
Background
The DED utilizes focused heat Energy to synchronously melt conveyed powdery or linear materials, and carries out layer-by-layer part manufacturing or single-layer cladding and repairing according to a preset track.
The laser directional energy deposition is used for manufacturing high-reflection material parts such as pure copper and the like, can fully exert the excellent physical and chemical properties of the high-reflection material, and has wide application prospect.
However, the laser absorption rate of the high-reflection material is limited to be extremely low, and based on the prior art, it is difficult to obtain parts of the high-reflection material with excellent forming quality, which seriously affects and hinders the industrial application of the high-reflection material such as pure copper.
Disclosure of Invention
The utility model aims to solve the problem that the laser processing of high-reflection materials such as pure copper is difficult, improve the performance of high-reflection material parts such as pure copper formed by laser directional energy deposition and improve the current industrial application situation of the high-reflection materials such as pure copper; a composite laser apparatus for a directional energy deposition apparatus is provided.
The utility model is realized by the following technical scheme:
a composite laser device for a directional energy deposition apparatus comprises a laser, and a laser processing head 4 connected with the laser;
the laser comprises a first laser 1 and a second laser 2;
the laser processing head 4 internally includes: a first expanded beam collimating lens 21 and a second expanded beam collimating lens 15; a light combining mirror 20, a total reflection mirror 16, a telescopic lens 17, a focusing lens 18 and a nozzle 19;
the first laser 1 transmits the laser of the first laser 1 to the first beam expanding and collimating lens 21, the light combining lens 20 and the focusing lens 18 in sequence through the first optical fiber 13, and then the laser is emitted from the light emitting hole 33 of the nozzle 19 and focused on a processing plane as a first light spot (the diameter is 3-5 mm);
the second laser 2 transmits the laser of the second laser 2 to the second beam expanding collimating lens 15 and the holophote 16 in sequence through the second optical fiber 14, the holophote 16 reflects the laser to the light combining mirror 20, then the laser is reflected to the focusing lens 18 through the light combining mirror 20, finally the laser is emitted from the light emitting hole 33 of the nozzle 19 and focused on the processing plane as a second light spot (the diameter is 3-5 mm);
the first light spot is an infrared light spot;
the second light spot is a blue-green light spot;
the focusing lens 18 is a telescopic focusing lens;
the infrared light spot and the blue-green light spot are focused by the focusing lens 18 and then emitted out through the light outlet 33 of the nozzle 19, and then the composite laser light spot is formed on the processing plane.
The first laser 1 is an infrared fiber laser; the second laser 2 is a blue-green semiconductor laser.
The light combining lens 20 is a light combining lens which transmits infrared light and reflects blue-green light.
The second beam expanding and collimating lens 15 and the first beam expanding and collimating lens 21 are used for expanding laser beams and integrating the laser beams into parallel light; the total reflection mirror 16 and the light combination mirror 20 have mirror surfaces parallel to each other, and the parallel angle is adjustable.
The directional energy deposition equipment comprises a multi-axis joint robot 3, and a laser processing head 4 is fixed on the multi-axis joint robot.
The multiaxial joint robot 3 is a six-axis joint robot.
The wavelength of the first laser 1 is 900nm to 1090nm, and the beam quality M2Less than 1.1;
the wavelength of the second laser 2 is 450 nm-560 nm, and the beam quality M2Less than 1.1.
A composite laser forming method, comprising the steps of:
step one; a first spot forming step:
the first laser 1 transmits the laser of the first laser 1 to the first beam expanding and collimating lens 21, the light combining lens 20 and the focusing lens 18 in sequence through the first optical fiber 13, and then the laser is emitted from the light emitting hole 33 of the nozzle 19 and focused into a first light spot on the processing plane;
step two; a second spot forming step:
the second laser 2 transmits the laser of the second laser 2 to the second beam expanding collimating lens 15 and the holophote 16 in sequence through the second optical fiber 14, the holophote 16 reflects the laser at 90 degrees to the light combining mirror 20, the light combining mirror 20 reflects the laser at 90 degrees to the focusing lens 18, and finally the laser is emitted from the light outlet 33 of the nozzle 19 and focused on the processing plane to be a second light spot;
step three; forming a composite laser spot:
the infrared light beam generated by the first laser 1 and the blue-green light beam generated by the second laser 2 enter the focusing lens 18 in parallel; and adjusting the focusing lens 18 to enable the infrared light beam and the blue-green light beam to gradually intersect at a point, and finally forming a composite laser spot containing the infrared light and the blue-green light on the processing plane.
The diameter of the composite laser spot is 3-5 mm.
Compared with the prior art, the utility model has the following advantages and effects:
the laser of the utility model is divided into two paths: the first laser 1 transmits the laser of the first laser 1 to the first beam expanding and collimating lens 21, the light combining lens 20 and the focusing lens 18 in sequence through the first optical fiber 13, and then the laser is emitted from the light emitting hole 33 of the nozzle 19 and focused into a first light spot on the processing plane; the second laser 2 transmits the laser of the second laser 2 to the second beam expanding collimating lens 15 and the holophote 16 in sequence through the second optical fiber 14, the holophote 16 reflects the laser for 90 degrees to the light combining mirror 20, the light combining mirror 20 reflects the laser for 90 degrees to the focusing lens 18, and finally the laser is emitted from the light outlet 33 of the nozzle 19 and focused on the processing plane to be a second light spot; the infrared light beam generated by the first laser 1 and the blue-green light beam generated by the second laser 2 enter the focusing lens 18 in parallel; and adjusting the focusing lens 18 to enable the infrared light beam and the blue-green light beam to gradually intersect at a point, and finally forming a composite laser spot containing the infrared light and the blue-green light on the processing plane. Through the laser processing head 4, the composite laser integrating the infrared laser and the blue-green laser is used for performing laser directional energy deposition on the high-reflection material, so that the problems of low laser absorption rate and poor forming quality of the high-reflection material such as pure copper deposited by laser directional energy deposition and the like generally existing in the prior art are effectively solved, the performances of laser directional energy deposition and forming of high-reflection material parts such as pure copper are greatly improved, and the industrial application status of the high-reflection material such as pure copper is substantially improved.
The infrared light spot and the blue-green light spot are focused by the focusing lens and are emitted through the light outlet hole of the nozzle, and then a composite laser light spot is formed on a processing plane. In a compound laser light spot kind, infrared facula is used for melting metal powder, forms the molten bath, and the blue-green facula helps promoting molten bath stability, reduces to splash, and then reduces internal defect, improves the shaping quality of work piece by a wide margin.
The focusing lens is a telescopic focusing lens, so that automatic focusing is met, the forming process is more stable, and the forming quality is guaranteed.
The utility model can realize the direct manufacture and the on-site repair of large-size parts, and greatly improves the size precision and the surface quality of a formed part by combining the traditional milling method;
the utility model combines an on-line monitoring system, monitors the forming process in real time, feeds back and adjusts the size of the part, and realizes the improvement of the forming quality.
Drawings
Fig. 1 is a schematic diagram of the structural layout of the composite laser device of the present invention and the coupling of infrared laser and blue-green laser.
FIG. 2 is a schematic diagram of the application of the composite laser device of the present invention to the existing directional energy deposition equipment.
Reference numerals: a first laser 1; a second laser 2; a multi-axis joint robot 3; a laser processing head 4; a tool magazine 5; a milling cutter 6; an integrated control system 7; a powder feeder 8; an online monitoring system 9; a gas cylinder 10; a biaxial positioner 11; a water chiller 12; passing through a first optical fiber; a second optical fiber 14; a second beam expanding and collimating lens 15; a total reflection mirror 16; a focusing lens 18; a nozzle 19; a light combining mirror 20; a first beam expanding and collimating lens 21.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Examples
As shown in fig. 1;
the utility model discloses a composite laser device for directional energy deposition equipment, which comprises a laser and a laser processing head 4 connected with the laser;
the laser comprises a first laser 1 and a second laser 2;
the laser processing head 4 internally includes: a first expanded beam collimating lens 21 and a second expanded beam collimating lens 15; a light combining mirror 20, a total reflection mirror 16, a telescopic lens 17, a focusing lens 18 and a nozzle 19;
the first laser 1 transmits the laser of the first laser 1 to the first beam expanding and collimating lens 21, the light combining lens 20 and the focusing lens 18 in sequence through the first optical fiber 13, and then the laser is emitted from the light emitting hole 33 of the nozzle 19 and focused on a processing plane as a first light spot (the diameter is 3-5 mm);
the second laser 2 transmits the laser of the second laser 2 to the second beam expanding collimating lens 15 and the holophote 16 in sequence through the second optical fiber 14, the holophote 16 reflects the laser to the light combining mirror 20, then the laser is reflected to the focusing lens 18 through the light combining mirror 20, finally the laser is emitted from the light emitting hole 33 of the nozzle 19 and focused on the processing plane as a second light spot (the diameter is 3-5 mm);
the first light spot is an infrared light spot;
the second light spot is a blue-green light spot;
the focusing lens 18 is a telescopic focusing lens;
the infrared light spot and the blue-green light spot are focused by the focusing lens 18 and are emitted out through the light outlet 33 of the nozzle 19, and then a composite laser light spot is formed on the processing plane.
In the composite laser spot, the infrared spot is used for melting metal powder to form a molten pool, the blue-green spot is beneficial to improving the stability of the molten pool and reducing splashing, so that the internal defect is reduced, and the forming quality of a workpiece is improved.
The first laser 1 is an infrared fiber laser; the second laser 2 is a blue-green semiconductor laser.
The light combining mirror 20 is a light combining mirror that transmits infrared light and reflects blue-green light, that is, the blue-green light can be reflected by the infrared light.
The second beam expanding and collimating lens 15 and the first beam expanding and collimating lens 21 are used for expanding laser beams and integrating the laser beams into parallel light; the total reflection mirror 16 and the light combination mirror 20 have mirror surfaces parallel to each other, and the parallel angle is adjustable.
The directional energy deposition equipment comprises a multi-axis joint robot 3, and a laser processing head 4 is fixed on the multi-axis joint robot.
The multi-axis joint robot 3 is a six-axis joint robot, but other robots may be used.
The wavelength of the first laser 1 is 900nm to 1090nm, and the beam quality M2Less than 1.1;
the wavelength of the second laser 2 is 450 nm-560 nm, and the beam quality M2Less than 1.1.
The nozzle 19 is distributed with powder outlet holes around, and is not described again because of belonging to the prior art;
the forming process of the composite laser spot comprises the following steps:
step one; a first spot forming step:
the first laser 1 transmits the laser of the first laser 1 to the first beam expanding and collimating lens 21, the light combining lens 20 and the focusing lens 18 in sequence through the first optical fiber 13, and then the laser is emitted from the light emitting hole 33 of the nozzle 19 and focused into a first light spot on the processing plane;
step two; a second spot forming step:
the second laser 2 transmits the laser of the second laser 2 to the second beam expanding collimating lens 15 and the holophote 16 in sequence through the second optical fiber 14, the holophote 16 reflects the laser at 90 degrees to the light combining mirror 20, the light combining mirror 20 reflects the laser at 90 degrees to the focusing lens 18, and finally the laser is emitted from the light outlet 33 of the nozzle 19 and focused on the processing plane to be a second light spot;
step three; forming a composite laser spot:
the infrared light beam generated by the first laser 1 and the blue-green light beam generated by the second laser 2 enter the focusing lens 18 in parallel; and adjusting the focusing lens 18 to enable the infrared light beam and the blue-green light beam to gradually intersect at a point, and finally forming a composite laser spot containing the infrared light and the blue-green light on the processing plane.
The diameter of the composite laser spot is 3-5 mm.
FIG. 2 shows a more pictorially illustrative example of the present invention, now briefly describing the operation of the present directed energy deposition apparatus, as follows:
(1) filling a high-reflection metal powder material with the powder particle size of between 15 and 150 microns into a powder feeder 8;
(2) importing the processed three-dimensional data model of the part into an integrated control system 7, and setting forming process parameters;
(3) starting the water cooler 12, the online monitoring system 9 and the powder feeder 8, and opening the gas cylinder 10;
(4) the multi-axis joint robot goes to the tool magazine 4 to clamp the laser processing head and returns to the directional energy deposition starting point;
(5) starting the first laser 1 and the second laser 2, automatically adjusting the focal length of a focusing lens 18 (a telescopic lens) according to set technological parameters, generating a composite light spot with a proper size on a processing plane, and starting directional energy deposition according to program setting;
(6) after depositing a plurality of layers of directional energy, suspending the directional energy deposition process, obtaining the difference information between the size data of the part and the design size of the part through an online monitoring system (9), and then carrying out milling processing or compensating on the next plurality of layers according to the information until the part is manufactured;
(7) the laser processing head 4 is placed back to the tool magazine 5, the multi-axis joint robot 3 returns to the original point of the equipment, and the equipment is closed;
(8) and taking out the part after the part is cooled to the room temperature.
As described above, the present invention can be preferably realized.
The embodiments of the present invention are not limited to the above-described embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and they are included in the scope of the present invention.
Claims (9)
1. A compound laser device for directed energy deposition equipment, comprising a laser, and a laser machining head (4) connected thereto, characterized in that:
the laser comprises a first laser (1) and a second laser (2);
the laser processing head (4) comprises internally: a first expanded beam collimating lens (21) and a second expanded beam collimating lens (15); a light combining mirror (20), a total reflection mirror (16), a telescopic lens (17), a focusing lens (18) and a nozzle (19);
the first laser (1) transmits the laser of the first laser (1) to a first beam expanding and collimating lens (21), a light combining lens (20) and a focusing lens (18) in sequence through a first optical fiber (13), and then the laser is emitted from a light emitting hole (33) of a nozzle (19) and focused on a processing plane to be used as a first light spot;
the second laser (2) transmits the laser of the second laser (2) to the second beam expanding collimating lens (15) and the total reflector (16) in sequence through the second optical fiber (14), the total reflector (16) reflects the laser to the light combining mirror (20), the laser is reflected to the focusing lens (18) through the light combining mirror (20), and finally the laser is emitted from a light emitting hole (33) of the nozzle (19) and focused on the processing plane to be used as a second light spot.
2. The composite laser device for directed energy deposition apparatus of claim 1, wherein:
the first light spot is an infrared light spot;
the second light spot is a blue-green light spot;
the focusing lens (18) is a telescopic focusing lens;
the infrared light spots and the blue-green light spots are focused by the focusing lens (18) and are emitted out through the light outlet (33) of the nozzle (19), and then the composite laser light spots are formed on the processing plane.
3. The composite laser device for directed energy deposition apparatus of claim 2, wherein:
the first laser (1) is an infrared fiber laser; the second laser (2) is a blue-green light semiconductor laser.
4. The composite laser device for directed energy deposition apparatus of claim 3, wherein:
the light combining lens (20) is a light combining lens which can transmit infrared light and reflect blue-green light.
5. The composite laser device for directed energy deposition apparatus of claim 4, wherein:
the second beam expanding and collimating lens (15) and the first beam expanding and collimating lens (21) are used for expanding laser beams and integrating the laser beams into parallel light; the mirror surfaces of the total reflection mirror (16) and the light combination mirror (20) are parallel to each other, and the parallel angle is adjustable.
6. The composite laser device for directed energy deposition apparatus of claim 5, wherein: the directional energy deposition device comprises a multi-axis joint robot (3), and a laser processing head (4) is fixed on the multi-axis joint robot.
7. The composite laser device for directed energy deposition apparatus of claim 6, wherein: the multi-axis joint robot (3) is a six-axis joint robot.
8. The composite laser device for directed energy deposition apparatus of claim 7, wherein:
the wavelength of the first laser (1) is 900 nm-1090 nm, and the beam quality M2Less than 1.1;
the wavelength of the second laser (2) is 450 nm-560 nm, and the beam quality M2Less than 1.1.
9. The composite laser device for directed energy deposition apparatus of claim 8, wherein:
the diameter of the composite laser spot is 3-5 mm.
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| CN202121980409.6U CN216126556U (en) | 2021-08-23 | 2021-08-23 | Composite laser device for directional energy deposition equipment |
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| CN202121980409.6U CN216126556U (en) | 2021-08-23 | 2021-08-23 | Composite laser device for directional energy deposition equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113664222A (en) * | 2021-08-23 | 2021-11-19 | 华南理工大学 | Composite laser device and method for directional energy deposition equipment |
| WO2024012610A1 (en) * | 2023-02-20 | 2024-01-18 | 广东省科学院新材料研究所 | System for laser additive manufacturing, and additive manufacturing method |
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2021
- 2021-08-23 CN CN202121980409.6U patent/CN216126556U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113664222A (en) * | 2021-08-23 | 2021-11-19 | 华南理工大学 | Composite laser device and method for directional energy deposition equipment |
| CN113664222B (en) * | 2021-08-23 | 2024-03-26 | 华南理工大学 | Composite laser device and method for directional energy deposition equipment |
| WO2024012610A1 (en) * | 2023-02-20 | 2024-01-18 | 广东省科学院新材料研究所 | System for laser additive manufacturing, and additive manufacturing method |
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