Double-wave composite laser light path system and 3D printing equipment with same

Abstract

The utility model provides a double-wave composite laser light path system and 3D printing equipment with the laser light path system. The laser light path system comprises a laser device integration module capable of outputting 1064-nanometer infrared light and 532-nanometer green light, a first beam expander module, a first galvanometer module, a first field lens, a second beam expander module, a second galvanometer module, a second field lens module and a 3D printing working table. According to the dual-wavelength dual-galvanometer laser light path system, infrared laser and green laser can be independently used, the two kinds of laser can also be used at the same time for machining operation, more process choices are achieved, and the application requirement is well met, especially for 3D printing operation of composite materials containing high-reflection metal materials and non-high-reflection materials.

Description

Technical Field

[0001] The present invention relates to the field of laser processing equipment, and more specifically, to a dual-wave composite laser optical path system and a 3D printing device having the laser optical path system. Background Art

[0002] At present, the mainstream optical path system for 3D printing equipment on the market is a 1064-nanometer infrared fiber laser or a 532-nanometer green laser, which is equipped with a galvanometer and field mirror suitable for the corresponding wavelength to realize 3D printing and other functions. However, this single optical path system has a relatively single applicability. For a device that wants to print multiple materials and has multiple process parameters, there will be limitations. Specifically, when using high-reflective metal materials such as gold, silver, copper, and aluminum for 3D printing, these high-reflective metal materials have a low absorption rate for infrared lasers, a large amount of infrared lasers are reflected, and splashing is easily generated during the 3D printing process. The quality of the products obtained by 3D printing is poor, and the processing effect is difficult to meet the requirements. When 3D printing non-high-reflective metal materials such as stainless steel and iron and some other non-high-reflective materials, the absorption rate of these materials to green light and infrared light is not much different. The power of the current green laser is generally lower than that of the infrared laser. Therefore, when using green lasers for 3D printing of non-high-reflective materials, the printing speed is slow and the production efficiency is not as good as using infrared lasers. In the current metal 3D printing market, there are many scenarios that require printing composite materials, which include both high-reflective metal materials and other non-high-reflective materials such as stainless steel or iron. Based on this, it is necessary to invent a dual-wave composite 3D printing device that has both a 1064-nanometer infrared laser optical path system and a 532-nanometer green laser optical path system, and can use the 3D printing device to perform laser 3D printing of a variety of composite materials. Utility Model Content

[0003] The technical problem to be solved by this application is to provide a dual-wavelength dual-galvanometer laser optical path system and a 3D printing device having the laser optical path system in view of the deficiencies of the prior art. The optical path system has both a 1064-nanometer infrared laser and a 532-nanometer green laser, and can be used to perform laser 3D printing of a variety of composite materials, conveniently add various process parameters suitable for the material, and quickly switch between infrared or green light sources for operation, which can add multiple functions to the equipment, thereby promoting the application of multi-wavelength composite lasers in laser 3D printing and other fields.

[0004] In order to solve the above technical problems, this application adopts the following technical solutions.

[0005] A dual-wavelength dual-galvanometer laser optical path system includes a laser integrated module that can output 1064 nanometer infrared light and 532 nanometer green light, a first beam expander module, a first galvanometer module, a first field mirror, a second beam expander module, a second galvanometer module, a second field mirror module, and a 3D printing work surface. The laser integrated module integrates a green laser light source module and an infrared laser light source module. The first beam expander module is used to adjust the divergence angle and spot size of the infrared light emitted by the laser, and the second beam expander module is used to adjust the divergence angle and spot size of the green laser emitted by the laser. The infrared light adjusted by the first beam expander module is incident from the light port of the first galvanometer module, and after being scanned by the first galvanometer module and focused by the first field mirror module, it is irradiated from the infrared laser light outlet to the 3D printing work surface, so that 3D printing within the range of the 3D printing work surface can be realized by using infrared laser. The green light adjusted by the second beam expander module enters from the light port of the second galvanometer module, and through galvanometer scanning and focusing by the second field lens module, 3D printing within the range of the 3D printing work surface can be achieved using green laser. Preferably, the laser integrated module has two light outlets, one for 1064 nanometer wavelength infrared light and the other for 532 nanometer wavelength green light.

[0006] The laser integrated module has the function of separately adjusting the power of infrared laser and green laser. In addition, it also adds process selection in the 3D printing process. By independently controlling the generation and output of infrared light and green light, infrared light processing and green light processing can operate independently and do not interfere with each other, so as to produce a good 3D printing effect.

[0007] The present application also provides a 3D printing device, which includes the above-mentioned dual-wavelength dual-galvanometer laser optical path system.

[0008] The present application discloses a dual-wavelength dual-galvanometer laser optical path system and 3D printing equipment. The laser integrated module of the dual-wavelength dual-galvanometer laser optical path system is located at the front end of the entire optical path system. The laser integrated module has two light source output ports. After the laser integrated module emits light, it is output through free space or optical fiber to the first beam expander module and the second beam expander module. Under the action of two sets of independent beam expanders, the required laser spot size can be guaranteed, and then output to the two sets of independent galvanometer light holes. By focusing with a high-speed scanning galvanometer plus a field mirror, the dual-wavelength laser can be used to achieve laser 3D printing of products or powders on the workbench. Compared with the prior art, the present application constructs a dual-wavelength dual-galvanometer laser optical path system, which can use infrared lasers and green lasers alone, or use two lasers at the same time for processing operations, with more process options, better meeting application requirements, especially for 3D printing operations of composite materials containing high-reflective metal materials and non-high-reflective materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0010] Figure 1 This is a schematic diagram of the structure of the dual-wave compound laser optical path system provided in this application.

[0011] Reference numerals:

[0012] 1. Laser integrated module, 21. First beam expander module, 22. First galvanometer module,

[0013] 23. First field mirror module, 31. Second beam expander module, 32. Second galvanometer module,

[0014] 33. Second field mirror module, 3. 3D printing work surface. DETAILED DESCRIPTION

[0015] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present application, and are not limitations on the scope of the rights of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0016] The technical problem to be solved by the present application is that, in view of the deficiencies in the prior art, a dual-wave composite laser optical path system and a 3D printing device having the same are provided. The optical path system can simultaneously generate a 1064-nanometer infrared laser and a 532-nanometer green laser. The optical path system can be used for laser 3D printing of a variety of composite materials, and it is convenient to add various process parameters suitable for the materials, and quickly switch between infrared or green light sources for operation. Multiple functions can be added to the equipment, thereby promoting the application of multi-wavelength composite lasers in laser 3D printing and other fields.

[0017] In order to solve the above technical problems, this application adopts the following technical solutions.

[0018] See also Figure 1 , Figure 1The schematic diagram of the structure of the dual-wave composite laser optical path system provided by the present application, the dual-wave composite laser optical path system provided by the present application can generate dual-wavelength laser and has a dual-galvanometer structure, which includes a laser integrated module 1 that can output 1064 nanometer infrared light and 532 nanometer green light, a first beam expander module 21, a first galvanometer module 22, a first field lens module 23, a second beam expander module 31, a second galvanometer module 32, a second field lens module 33 and a 3D printing workbench 3. The laser integrated module 1 integrates a green laser light source module and an infrared laser light source module, the first beam expander module 21 is used to adjust the divergence angle and spot size of the infrared light emitted by the laser integrated module 1, and the second beam expander module 31 is used to adjust the divergence angle and spot size of the green laser emitted by the laser. The infrared light adjusted by the first beam expander module 21 is incident from the light port of the first galvanometer module 22, and after being scanned by the first galvanometer module 22 and focused by the first field lens module 23, it is irradiated from the infrared laser light outlet to the 3D printing work surface 3, so that the infrared laser can be used to perform 3D printing within the range of the 3D printing work surface 3. The green light adjusted by the second beam expander module 31 is incident from the light port of the second galvanometer module 32, and after being scanned by the galvanometer and focused by the second field lens module 33, it is irradiated from the green laser light outlet to the 3D printing work surface 3, so that the green laser can be used to perform 3D printing within the range of the 3D printing work surface.

[0019] Preferably, the laser integrated module 1 has two light source output ports, one for 1064 nanometer wavelength infrared light, and the other for 532 nanometer wavelength green light. The two light source output ports independently control the output of infrared light and green light, so that infrared light processing and green light processing operate independently without interfering with each other.

[0020] Preferably, the output light of the laser integrated module 1 can output green laser and infrared laser in a free space output mode to facilitate system installation; or output green laser and infrared laser in an output mode coupled to an optical fiber to focus on ensuring the beam quality.

[0021] Preferably, the infrared laser is adapted to an independent beam expander for adjustment, and an independent galvanometer field lens is used for scanning and outputting to complete 3D printing, and the green light is adapted to an independent beam expander for adjustment, and another independent galvanometer field lens is used for scanning and outputting to complete 3D printing, so that the infrared light processing and the green light processing operate independently and do not interfere with each other.

[0022] Preferably, the infrared laser and green laser are projected onto the same work platform after passing through respective galvanometers and field lenses, and subsequent 3D printing can switch to call infrared laser or green laser or perform both laser operations simultaneously according to demand.

[0023] Preferably, the infrared laser and the green laser are projected onto the same work platform after passing through their respective galvanometer field lenses. When two lasers, infrared laser and green laser, are used for 3D printing, one laser is used as the main laser for 3D printing, and the other laser is used as the auxiliary laser for 3D printing. The main laser can make the material to be printed reach a molten state, and the auxiliary laser can only change the material properties of the material to be printed, but will not make the material to be printed reach a molten state. The auxiliary heating field can reduce the temperature gradient of the laser processing area and the surrounding area where the main laser acts, so as to reduce the problem of splashing, and the products manufactured by 3D printing are free of bubbles and cracks.

[0024] Preferably, the periphery of the processing area of ​​the main laser and the auxiliary laser forms a circular or elliptical auxiliary heating field (it should be noted that the "circular or elliptical" here is not limited to a standard circle or ellipse, and can also be other shapes that are approximately circular or elliptical).

[0025] Preferably, the laser integrated module has the function of separately adjusting the power of infrared laser and green laser, thereby increasing the process options in the 3D printing process.

[0026] The 3D printing work surface 3 has a driving mechanism for moving the green laser light outlet, the infrared laser light outlet and the material to be processed relative to each other on at least two different axes.

[0027] Furthermore, the green laser module and the infrared laser module may be continuous lasers, or quasi-continuous lasers, or pulsed lasers, which are not limited here.

[0028] Furthermore, in a preferred embodiment, the focal points of the green laser and the infrared laser of the dual-wave composite laser optical path system are both directed onto the 3D printing work surface 3 to utilize the strongest processing energy, which will also produce a good 3D printing effect.

[0029] In an optional solution, the dual-wavelength dual-galvanometer laser optical path system described in the present application can be used in a variety of laser processing application fields such as laser cutting, laser welding, laser engraving, laser cleaning, and laser 3D printing, with priority given to applications in the additive manufacturing field of laser 3D printing composite materials.

[0030] The present application also provides a 3D printing device, which includes the above-mentioned dual-wavelength dual-galvanometer laser optical path system.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device that includes a series of elements are inherent to the elements. In the absence of more restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device that includes the elements. In addition, the above-mentioned technical solutions provided in the embodiments of the present application are consistent with the corresponding technical solutions in the prior art in the principle of implementation, and the part is not described in detail, so as not to be too much.

[0032] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and its core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and the various embodiments in the present application can be combined, and these improvements, modifications and combinations also fall within the scope of protection of the claims of the present application.

Claims

1. A dual-wave composite laser optical path system, characterized in that , comprising a laser integrated module (1) capable of outputting 1064 nanometer infrared light and 532 nanometer green light, a first beam expander module (21), a first galvanometer module (22), a first field lens module (23), a second beam expander module (31), a second galvanometer module (32), a second field lens module (33) and a 3D printing work surface (3); The laser integrated module (1) integrates a green laser light source module and an infrared laser light source module; The first beam expander module (21) is used to adjust the divergence angle and spot size of the infrared light emitted by the laser, and the second beam expander module (31) is used to adjust the divergence angle and spot size of the green laser light emitted by the laser; The infrared light adjusted by the first beam expander module (21) is incident from the light passage of the first galvanometer module (22), scanned by the first galvanometer module (22) and focused by the first field mirror module (23), and then irradiated from the infrared laser light outlet to the 3D printing work surface (3); The green light adjusted by the second beam expander module (31) is incident from the light passage of the second galvanometer module (32), scanned by the galvanometer and focused by the second field mirror module (33), and irradiated from the green laser light outlet to the 3D printing work surface (3).

2. The dual-wave composite laser optical path system according to claim 1 is characterized in that The laser integrated module (1) has two light source output ports, one for infrared light with a wavelength of 1064 nanometers and the other for green light with a wavelength of 532 nanometers. The two light source output ports independently control the output of infrared light and green light.

3. The dual-wave composite laser optical path system according to claim 1 is characterized in that The output light of the laser integrated module (1) can output green laser and infrared laser in a free space output mode, or can output green laser and infrared laser in an output mode coupled to an optical fiber.

4. The dual-wave composite laser optical path system according to claim 1, characterized in that The infrared laser and green laser are projected onto the same work platform after passing through their respective galvanometers and field lenses. The subsequent 3D printing operation is to switch to call the infrared laser or green laser for laser operation.

5. The dual-wave composite laser optical path system according to claim 1 is characterized in that The infrared laser and green laser are projected onto the same working platform after passing through their respective galvanometer field lenses, and the subsequent 3D printing is a laser operation with both infrared laser and green laser.

6. The double-wave composite laser optical path system according to claim 5, characterized in that ,When 3D printing is performed with both infrared laser and green laser, one laser is used as the main laser for 3D printing, and the other laser is used as the auxiliary laser for 3D printing; The main laser makes the material to be printed reach a molten state, and the auxiliary laser only changes the material properties of the material to be printed, but does not make the material to be printed reach a molten state.

7. The double-wave composite laser optical path system according to claim 6, characterized in that , the periphery of the processing area of ​​the main laser and the auxiliary laser forms a circular or elliptical auxiliary heating field.

8. The dual-wave compound laser optical path system as claimed in claim 1, characterized in that: The 3D printing work surface (3) has a driving mechanism for moving the green laser light outlet, the infrared laser light outlet and the material to be processed relative to each other on at least two different axes.

9. The dual-wave compound laser optical path system as claimed in claim 1, characterized in that: The focal points of the green laser and the infrared laser are both directed onto the 3D printing work surface (3).

10. A 3D printing device, characterized in that: A double-wave compounded laser optical path system comprising any one of claims 1-9.

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