Quick lens changing module and lens changing method suitable for reflection type laser processing head

Abstract

The application provides a quick mirror changing module suitable for a reflective laser processing head, comprising a cavity, a back cover and a mirror assembly, the mirror assembly is located in a cavity enclosed by the cavity and the back cover, the cavity is provided with an incident laser hole and a reflected laser hole, the mirror assembly comprises a mirror seat, at least two kinds of mirrors with different reflecting surface specifications are arranged on the mirror seat, a guide rail is arranged in the cavity, a sliding block is arranged on the mirror seat and is in sliding cooperation with the guide rail, the mirrors are arranged in sequence along the sliding direction of the mirror seat, and the incident optical axis of the incident laser hole intersects with the outgoing optical axis of the reflected laser hole on the moving track of the reflecting surface of each mirror. The application also provides a mirror changing method suitable for the quick mirror changing module of the reflective laser processing head.

Description

Technical Field

[0001] This invention relates to the field of laser processing, and more particularly to a quick mirror-changing module and method suitable for reflective laser processing heads. Background Technology

[0002] In practical applications of laser processing, different focused beams are used depending on the processing requirements, and their specifications are determined by the focusing mirror. Since existing laser processing heads only have one focusing mirror, it needs to be replaced. Because replacing the mirror exposes the inner cavity of the laser processing head, this operation should ideally be performed in a cleanroom environment. However, due to varying on-site conditions and personnel skill levels, the replacement operation is generally carried out on-site during processing.

[0003] In addition, when replacing the reflector in the existing laser processing head, the cooling water circuit needs to be disconnected and the residual cooling water in the internal and external pipes of the reflector needs to be drained before the reflector can be separated from the mounting base and a new reflector of another specification can be installed. This process requires high standards for on-site auxiliary equipment and personnel operation, and the laser processing head cavity is exposed to the outside for too long during the entire process, which poses a high risk of dust ingress.

[0004] Therefore, it is necessary to design a quick mirror-changing module suitable for modular reflective laser processing heads, which can quickly and easily replace the reflector and reduce the risk of prolonged exposure of the internal cavity. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects of the prior art and provide a quick mirror changing module and mirror changing method suitable for reflective laser processing heads. It contains multiple mirror mounting positions and can quickly switch mirrors without disassembling the module. This invention solves at least some of the problems in the prior art.

[0006] This invention is implemented as follows:

[0007] This invention provides a quick mirror changing module suitable for reflective laser processing heads, comprising a cavity, a rear cover, and a mirror assembly. The mirror assembly is located within the cavity formed by the cavity and the rear cover. The cavity has an incident laser aperture and a reflected laser aperture. The mirror assembly includes a mirror mount, on which at least two types of reflective surface specifications are mounted. A guide rail is provided within the cavity, and a slider that slides with the guide rail is provided on the mirror mount. The reflective mirrors are arranged sequentially along the sliding direction of the mirror mount. The incident optical axis of the incident laser aperture and the exit optical axis of the reflected laser aperture intersect on the moving trajectory of the reflecting surface of each reflective mirror.

[0008] Furthermore, a collimating lens module is installed at the incident laser aperture.

[0009] Furthermore, a protective mirror module is installed at the laser reflection aperture.

[0010] Furthermore, the mirror mount is equipped with a first reflector, a second reflector, and a water-cooling assembly for cooling the reflectors. The water-cooling assembly includes a water inlet connector, a water outlet connector, and a water circulator with an internal water passage. The water inlet connector is connected to the water inlet of the first reflector, the water outlet of the first reflector is connected to the water inlet of the second reflector through the water circulator, and the water outlet of the second reflector is connected to the water outlet connector.

[0011] Furthermore, the cavity is equipped with an external water inlet connector and an external water outlet connector. The water inlet connector is connected to the external water inlet connector via a hose, and the water outlet connector is connected to the external water outlet connector via a hose.

[0012] Furthermore, a positioning block is provided at each end of the guide rail along the sliding direction of the mirror mount.

[0013] Furthermore, a spring pin is fixed inside the cavity, and the mirror mount has several tapered pin holes that are inserted and engaged with the spring pin, with each tapered pin hole corresponding to a reflector.

[0014] Furthermore, the cavity is equipped with a first adjustable air valve and a second adjustable air valve that can blow air into the cavity. Along the sliding direction of the mirror mount, the first adjustable air valve and the second adjustable air valve are located on both sides of the incident laser aperture, and the air outlets of the first adjustable air valve and the second adjustable air valve face the reflecting surface of the mirror.

[0015] This invention also provides a method for changing mirrors in a quick mirror-changing module suitable for reflective laser processing heads, comprising the following steps: S1, opening the valves of the first and second adjustable air valves to create a positive pressure inside the cavity, while simultaneously blowing away the mirrors in non-working positions; S2, opening the rear cover, at which point external dust is difficult to enter due to the positive pressure inside the cavity; S3, pulling out the spring pin and sliding the mirror mount so that a mirror of another specification is aligned with the incident laser aperture and the reflected laser aperture; S4, inserting the spring pin into the tapered pin hole on the mirror mount to fix the mirror mount; S5, closing the rear cover and closing the valves of the first and second adjustable air valves; S6, if it is necessary to continue changing mirrors, repeat steps S1 to S5.

[0016] The present invention has the following beneficial effects:

[0017] 1. This invention provides a quick-change mirror module suitable for modular reflective laser processing heads. The traditional reflective laser head structure is functionally designed as a modular combination. The mirror module includes a lateral moving structure with two mirror mounting positions, allowing simultaneous installation of two focusing mirrors of different specifications. During use, the required mirror is simply moved to the working position. Unlike currently available products, this eliminates the need to first drain the internal cooling water, then disassemble the mirror from the mounting base, and reinstall a mirror of the other specification. In this process, the laser processing head's internal cavity is exposed for an excessively long time, posing a significant risk of dust ingress.

[0018] 2. This invention provides a quick mirror changing module suitable for modular reflective laser processing heads, which can simultaneously install two mirrors of different specifications. Switching does not require disassembling the processing head, making it convenient and quick, and reducing the risk of dust entering the inner cavity of the laser processing head.

[0019] 3. In this invention, when it is necessary to change from one type of reflector to another type of reflector, open the valves of the first and second adjustable air valves respectively to make the inside of the cavity a positive pressure state, and then open the back cover. At this time, because of the positive pressure inside the cavity, it is difficult for external dust to enter. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of a quick-change mirror module for a modular reflective laser processing head provided in an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the internal structure of a quick-change module for a modular reflective laser processing head provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the quick-change lens module for modular reflective laser processing heads provided in an embodiment of the present invention after the back cover is opened.

[0024] In the diagram: 1. Cavity; 2. Rear cover; 3. No. 2 adjustable air valve; 4. No. 1 reflector; 5. No. 2 reflector; 6. Mirror base; 7. Water outlet connector; 8. Water inlet connector; 9. External water inlet connector; 10. External water outlet connector; 11. Positioning block; 12. Guide rail; 13. Spring pin; 14. Slider; 15. No. 1 adjustable air valve; 16. Incident laser; 17. Reflected laser; 18. Incident laser aperture; 19. Reflected laser aperture; 20. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] like Figures 1-3 Embodiment 1 of the present invention provides a quick-change mirror module suitable for modular reflective laser processing heads. The external structural composition of the present invention is shown in the attached figure. Figure 1 As shown, all parts are mounted on cavity 1. A rubber ring is provided on the rear cover 2, which is fixed to cavity 1 with screws, sealing the interior of cavity 1. Screw holes are located around the incident laser aperture 19 and the reflected laser aperture 20 for connecting the collimating lens module and protective lens module of the modular laser processing head. Adjustable air valve 16 (first adjustment) and adjustable air valve 3 (second adjustment) are located on the side of the incident laser 17, distributed on the left and right sides, both connected to clean, dry air.

[0027] Appendix Figure 2 The remaining parts of the cavity 1, rear cover 2, and two adjustable air valves are removed for this invention. Reflector 4 (first reflector) and reflector 5 (second reflector) are mounted on mirror base 6 with screws. Reflectors 4 and 5 have different reflective surface specifications but are mounted in the same position. Cooling flow paths are provided on reflectors 4 and 5, and mirror base 6 has corresponding inlet and outlet water holes for the two reflectors, sealed with sealing rings. A water purifier 8 is mounted on the other side of mirror base 6 with screws and sealing rings. The water purifier 8 has internal water channels connecting the outlet of reflector 4 and the inlet of reflector 5. Inlet connector 9 is mounted on mirror base 6 and communicates with the inlet of reflector 4. Outlet connector 7 is mounted on mirror base 6 and communicates with the outlet of reflector 5.

[0028] Appendix Figure 3 The back cover 2 is removed for this invention. The guide rail 13 is fixed inside the cavity 1 with screws, and the slider 15 can slide left and right on the guide rail 13. The mirror mount 6 is fixed to the slider 15 with screws. A positioning block 12 is provided at each end of the guide rail 13, which is fixed inside the cavity 1 with screws, and the positioning block 12 limits the position of the mirror mount 6. The spring pin 14 is fixed inside the cavity 1 with screws. The external water inlet connector 10 and the external water outlet connector 11 are respectively fixed to the cavity 1. The water inlet connector 9 is connected to the external water inlet connector 10 via a hose. The water outlet connector 7 is connected to the external water outlet connector 11 via a hose. The external water inlet connector 10, water inlet connector 9, water filter 8, water outlet connector 7, and external water outlet connector 11 form a water circuit used to provide cooling water to the two reflectors and remove heat.

[0029] Embodiment 2 of the present invention provides a method for changing mirrors in a quick mirror-changing module suitable for modular reflective laser processing heads: During use, ensure that the tapered pin on the spring pin 14 is inserted into the rightmost of the two tapered pin holes distributed on the left and right sides of the mirror base 6, and that it is tightly fitted with the tapered pin hole by the action of the internal spring. At this time, the entire mirror base 6 is biased to the left side of the cavity 1, using the second reflector 5, while the first reflector 4 is in a non-working position on the left side. When it is necessary to change to a different size reflector, open the valves of the first adjustable air valve 16 and the second adjustable air valve 3 respectively and adjust their positions to create a positive pressure state inside the cavity 1. Open the rear cover 2; at this time, because of the positive pressure inside the cavity 1, it is difficult for external dust to enter. Simultaneously, since the air outlet of the first adjustable air valve 16 is directly facing the reflective surface of the first reflector 4, the high-speed airflow can clean the dust adhering to the mirror surface. Pull out the spring pin 14 and slide the mirror base 6 to the right until the slider 15 contacts the positioning block 12. Release the spring pin 14; the internal spring will engage tightly with the tapered pin hole on the left side of the mirror base 6, ensuring accurate positioning. At this point, the first reflector 4 is being used, while the second reflector 5 is in its non-working position on the right. Since the air outlet of the second adjustable air valve 3 faces the reflective surface of the second reflector 5, the high-speed airflow can clean the dust adhering to the mirror surface. Replace the rear cover 2, tighten the screws, and close the valves of the first adjustable air valve 16 and the second adjustable air valve 3. The entire mirror replacement process is now complete.

[0030] If you need to switch back to using the second reflector 5, the operation is the same as above, except that you slide the mirror base 6 to the left and insert the spring pin 14 into the tapered pin hole on the right side of the mirror base 6.

[0031] This invention relates to a novel reflector module, which needs to be used in conjunction with a reflective laser processing head. Two reflectors of different specifications can be installed simultaneously, and switching between them does not require disassembling the processing head, making it convenient and quick, and reducing the risk of dust entering the inner cavity of the laser processing head.

[0032] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quick mirror changing module suitable for reflective laser processing heads, characterized in that: The system includes a cavity, a rear cover, and a reflector assembly. The reflector assembly is located within the cavity formed by the cavity and the rear cover. The cavity has an incident laser aperture and a reflected laser aperture. The reflector assembly includes a mirror mount on which at least two reflectors of different reflective surface specifications are mounted. A guide rail is provided within the cavity, and a slider that slides along the guide rail is provided on the mirror mount. The reflectors are arranged sequentially along the sliding direction of the mirror mount. The incident optical axis of the incident laser aperture and the exit optical axis of the reflected laser aperture intersect on the movement trajectory of the reflective surface of each reflector. The mirror mount houses a first reflector, a second reflector, and a water-cooling assembly for cooling the reflectors. The water-cooling assembly includes a water inlet connector, a water outlet connector, and a water passage with internal water flow. The device includes a water inlet connector connected to the water inlet of the first reflector, a water outlet of the first reflector connected to the water inlet of the second reflector via the water inlet device, and a water outlet of the second reflector connected to the water outlet connector. An external water inlet connector and an external water outlet connector are installed on the cavity. The water inlet connector is connected to the external water inlet connector via a flexible hose, and the water outlet connector is connected to the external water outlet connector via a flexible hose. The cavity is equipped with a first adjustable air valve and a second adjustable air valve for blowing air into the cavity. Along the sliding direction of the mirror mount, the first and second adjustable air valves are located on opposite sides of the incident laser aperture, and their outlets face the reflecting surface of the reflector.

2. The quick-change mirror module for reflective laser processing heads as described in claim 1, characterized in that: A collimating lens module is installed at the incident laser aperture.

3. The quick-change mirror module for reflective laser processing heads as described in claim 1, characterized in that: A protective mirror module is installed at the laser reflection aperture.

4. The quick-change mirror module for reflective laser processing heads as described in claim 1, characterized in that: Along the sliding direction of the mirror mount, a positioning block is provided at each end of the guide rail.

5. The quick-change mirror module for reflective laser processing heads as described in claim 1, characterized in that: A spring pin is fixed inside the cavity, and the mirror mount has several tapered pin holes that are inserted and engaged with the spring pin. Each tapered pin hole corresponds to a reflector.

6. A mirror-changing method for a rapid mirror-changing module suitable for a reflective laser processing head, applied to the rapid mirror-changing module as described in any one of claims 1-5, characterized in that, The steps include: S1, opening the valves of adjustable air valves one and two to create a positive pressure inside the cavity, which also allows the non-working mirror to be blown out; S2, opening the back cover, where the positive pressure inside the cavity prevents external dust from entering; S3, pulling out the spring pin and sliding the mirror mount to align a mirror of another specification with the incident laser aperture and the reflected laser aperture. S4. Insert the spring pin into the tapered pin hole on the mirror mount to fix the mirror mount; S5. Cover the back cover and close the valves of the first and second adjustable air valves; S6. If you need to replace the reflector again, repeat steps S1 to S5.

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