High power laser cleaning head

Abstract

The application provides a high-power laser cleaning head, which comprises a shell assembly, a collimating mirror module, a galvanometer mirror module, a field lens module and a protection mechanism, the shell assembly has a shell and a heat dissipation mechanism, the shell is provided with an accommodating space, the shell is provided with a first opening and a second opening, the heat dissipation mechanism is arranged on the shell and is used for dissipating heat for the shell; the collimating mirror module is connected with the shell, the light outlet of the collimating mirror module is arranged opposite to the first opening, and the collimating mirror module is used for being connected with an external laser; the galvanometer mirror module is connected with the shell, the galvanometer mirror module has a galvanometer mirror, the galvanometer mirror is located in the accommodating space and is located behind the collimating mirror module; the field lens module is connected with the shell, the field lens module has a field lens, the field lens is located in the accommodating space and is located behind the galvanometer mirror; and the protection mechanism has a protection lens, and the protection lens blocks the second opening. The high-power laser cleaning head has the advantages of high power, high cleaning efficiency, reliable and stable structure and long service life.

Description

Technical Field

[0001] This application belongs to the field of laser cleaning technology, and in particular relates to a high-power laser cleaning head. Background Technology

[0002] Laser cleaning technology utilizes a high-energy laser beam to irradiate the surface of a workpiece, causing dirt, rust, or coatings to evaporate or peel off instantly, thus achieving the purpose of cleaning the workpiece. Laser cleaning technology has advantages such as high cleaning quality, no consumables, high efficiency, and no wastewater pollution. Currently, the laser cleaning heads on the market have low power, mostly in the hundreds of watts range, resulting in low cleaning efficiency. Summary of the Invention

[0003] This application provides a high-power laser cleaning head to solve the problems of low power and low cleaning efficiency of existing laser cleaning heads.

[0004] In a first aspect, embodiments of this application provide a high-power laser cleaning head, comprising:

[0005] A housing assembly has a housing and a heat dissipation mechanism. The housing has an accommodating space, and the housing has a first opening and a second opening. The heat dissipation mechanism is disposed on the housing and is used to dissipate heat from the housing.

[0006] A collimating lens module is connected to the housing. The light outlet of the collimating lens module is positioned opposite to the first opening. The collimating lens module is used to connect to an external laser.

[0007] A galvanometer module is connected to the housing. The galvanometer module has galvanometer lenses, which are located within the receiving space and are positioned behind the collimating lens module.

[0008] A field lens module is connected to the housing. The field lens module has a field lens located within the receiving space and behind the galvanometer lens.

[0009] A protective mechanism having a protective lens that blocks the second opening.

[0010] Optional, also includes:

[0011] A reflector module is connected to the housing. The reflector module has a reflector located within the receiving space and in the optical path of the collimating mirror module. The galvanometer lens receives the reflected light from the reflector.

[0012] Optionally, the reflector module further includes:

[0013] The reflector base has a second inlet, a second outlet, and a second channel. The second inlet and the second outlet are connected to the second channel. The reflector is mounted on the reflector base. The housing also has a third opening, which is sealed by the reflector base.

[0014] Optionally, the reflector module further includes:

[0015] The first temperature measuring mechanism is disposed on the reflector base and is used to detect the temperature of the reflector;

[0016] And / or, a first light metering mechanism is disposed on the base of the reflector and located on the back of the reflector. The first light metering mechanism is used to detect the light intensity of the forward light passing through the reflector.

[0017] Optionally, the galvanometer module further includes:

[0018] A galvanometer motor, the output of which is connected to the galvanometer lens;

[0019] A galvanometer mounting base is sleeved on the galvanometer motor and fixed to the housing. The housing has a fourth opening, and the galvanometer lens extends from the fourth opening into the receiving space.

[0020] Optionally, the heat dissipation mechanism includes:

[0021] The first inlet is located on the housing.

[0022] The first outlet is located on the housing;

[0023] A first channel is disposed on the housing, and the first channel portion is arranged around the fourth opening. The first inlet and the first outlet are connected to the first channel, and the first inlet and the first outlet are used to connect to an external water chiller.

[0024] Optionally, the field lens module further includes:

[0025] A water-cooled plate is provided, and a fifth opening is provided on the housing. The water-cooled plate seals the fifth opening, and the field lens is attached to the water-cooled plate.

[0026] Optionally, the protection mechanism further includes:

[0027] The cover plate has a first window corresponding to the second opening;

[0028] The protective lens holder has a connecting part and a frame. The connecting part is connected to the frame. The frame has a second window corresponding to the second opening. The cover plate clamps and fixes the protective lens to the frame. The housing has a groove. The frame, cover plate and protective lens are located in the groove. The connecting part is detachably connected to the housing.

[0029] Optional, also includes:

[0030] The light metering module has a sixth opening on its housing, which is opposite to the second opening. The light metering module blocks the sixth opening and is used to detect the light intensity of the reflected light in the accommodating space.

[0031] Optionally, the photometric module includes:

[0032] A photodiode is used to detect the intensity of reflected light within the accommodating space;

[0033] A photometer mounting block blocks the sixth opening. The photometer mounting block has a mounting hole on one side of the accommodating space, and the photometer diode is installed in the mounting hole.

[0034] A light-blocking plate is connected to the photometer mounting block to block the mounting hole. The light-blocking plate is provided with a light-transmitting hole, which is arranged opposite to the photometer diode. A light-shielding sheet is provided on the light-transmitting hole.

[0035] Optionally, an air knife dust extraction assembly is also included, having:

[0036] An air knife mechanism includes a bracket and multiple air knives. The bracket is located on the light-emitting side of the second opening and is connected to the housing. The multiple air knives are spaced apart on the bracket along the light-emitting direction of the second opening, and the air knives blow air in the direction of the width of the second opening.

[0037] The dust extraction mechanism is located on the light-emitting side of the second opening and is positioned opposite to the air knife.

[0038] Optionally, the air knife includes:

[0039] The body has an air inlet and an air outlet, and an air cavity is formed inside the body. The air inlet and the air outlet are respectively connected to the air cavity. A long side wall of the air outlet extends away from the body along the airflow direction. The ratio of the distance the side wall extends to the width of the air outlet is between 3 and 200.

[0040] The high-power laser cleaning head provided in this application embodiment has a housing assembly, a collimating lens module, a galvanometer module, a field lens module, and a protective mechanism. The collimating lens module, galvanometer module, and field lens module are installed in the housing. The galvanometer lens of the galvanometer module and the field lens of the field lens module are located in the receiving space. The housing of the housing assembly and the protective mechanism form a sealed space to prevent dust and debris during the cleaning process from entering the laser cleaning head and contaminating the galvanometer lens and field lens, thus avoiding contamination and damage to the field lens and galvanometer lens and improving the service life of the field lens and galvanometer lens. In addition, the housing is also provided with a heat dissipation mechanism to dissipate heat from the housing and prevent the high-power laser cleaning head from overheating and damaging the laser cleaning head. This overcomes the problems of low power and low cleaning efficiency of existing laser cleaning heads. The laser cleaning head can reach the kilowatt level and has the advantages of high power, high cleaning efficiency, reliable and stable structure, and long service life. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0043] Figure 1 This is a first axonometric view of a high-power laser cleaning head provided in an embodiment of this application.

[0044] Figure 2 This is a second axonometric view of the high-power laser cleaning head provided in an embodiment of this application.

[0045] Figure 3 This is a first axial side view of the housing provided in an embodiment of this application.

[0046] Figure 4 This is a second axial side view of the housing provided in an embodiment of this application.

[0047] Figure 5 A perspective sectional view of the housing provided in an embodiment of this application.

[0048] Figure 6 A side view of the housing provided for an embodiment of this application.

[0049] Figure 7 for Figure 6 Partial sectional view of AA.

[0050] Figure 8A front view of the housing provided for an embodiment of this application.

[0051] Figure 9 for Figure 8 A partial sectional view of the CC section.

[0052] Figure 10 A side view of the housing assembled with the galvanometer module and field lens module according to an embodiment of this application.

[0053] Figure 11 for Figure 10 Cross-sectional perspective of BB.

[0054] Figure 12 This is a first axonometric view of the mirror module provided in an embodiment of this application.

[0055] Figure 13 for Figure 12 Side view.

[0056] Figure 14 for Figure 13 DD section view.

[0057] Figure 15 This is a second axonometric view of the mirror module provided in an embodiment of this application.

[0058] Figure 16 for Figure 15 Front view.

[0059] Figure 17 for Figure 16 EE section view.

[0060] Figure 18 A schematic diagram of the protection mechanism provided in the embodiments of this application.

[0061] Figure 19 An exploded view of the protection mechanism provided in the embodiments of this application.

[0062] Figure 20 This is a schematic diagram of the photometric mechanism provided in an embodiment of this application.

[0063] Figure 21 for Figure 20 A sectional perspective view of FF.

[0064] Figure 22 This is a schematic diagram of the structure of the photometer mounting block in the photometering mechanism provided in the embodiments of this application.

[0065] Figure 23 This is a schematic diagram of the air knife mechanism provided in the embodiments of this application.

[0066] Figure 24 A side view of the air knife provided in an embodiment of this application.

[0067] Figure 25 for Figure 24 Sectional view of GG.

[0068] Figure 26 An exploded view of the air knife provided in an embodiment of this application. Detailed Implementation

[0069] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0070] This application provides a high-power laser cleaning head to solve the problems of low power and low cleaning efficiency in existing laser cleaning heads. The following description will be provided in conjunction with the accompanying drawings.

[0071] See Figure 1 and Figure 2 As shown, a high-power laser cleaning head includes a housing assembly 100, a collimating lens module 200, a galvanometer module 400, and a field lens module 500. 和 Protection agency 600.

[0072] See Figures 3 to 9 As shown, the aforementioned housing assembly 100 includes a housing 110 and a heat dissipation mechanism 120. A receiving space 111 is formed inside the housing 110. A first opening 112 and a second opening 113 are provided on the housing 110. The first opening 112 and the second opening 113 communicate with the receiving space 111. The heat dissipation mechanism 120 is disposed on the housing 110. The heat dissipation mechanism 120 is used to dissipate heat from the housing 110 to prevent the temperature of the housing 110 from becoming too high and damaging the optical components inside the housing 110, thereby improving the service life of the laser cleaning head.

[0073] See Figure 1As shown, the collimating lens module 200 is connected to the housing 110. The light output port of the collimating lens module 200 is opposite to the first opening 112. The collimating lens module 200 is located outside the housing 110. The collimating lens module 200 is connected to an external laser through an optical fiber. The laser emitted by the laser is collimated by the collimating lens module 200 and then enters the receiving space 111. The collimating lens module 200 includes a collimating lens and a collimating lens housing. The collimating lens is installed inside the collimating lens housing. A flange connection plate is provided at one end of the collimating lens housing facing the housing 110. The collimating lens module 200 is connected to the flange of the housing 110 around the first opening 112 through the flange connection plate, which facilitates the installation and removal of the collimating lens module 200. A QD connector or QBH connector is provided at the other end of the collimating lens housing for connection to the laser output end. The insertion and removal operation is convenient. The collimating lens housing is provided with a water inlet and a water outlet. A water cooling channel is provided inside the collimating lens housing. The water inlet and water outlet of the collimating lens housing are connected to an external water chiller through pipe connectors to provide water cooling heat dissipation for the collimating lens module 200, protect the collimating lens, and improve the service life of the collimating lens module.

[0074] See Figure 1 , Figure 10 and Figure 11 As shown, the galvanometer module 400 is connected to the housing 110. The galvanometer module 400 has a galvanometer lens 410, which is located in the receiving space 111. The galvanometer lens 410 is located after the collimating lens module 200. The galvanometer lens 410 receives the laser beam collimated by the collimating lens module 200 and controls the galvanometer lens 410 to swing according to the laser cleaning trajectory.

[0075] See Figure 1 and Figure 11 As shown, the field lens module 500 is connected to the housing 110. The field lens module 500 has a field lens 510, which is located in the receiving space 111. The field lens 510 is located behind the galvanometer lens 410 and focuses the laser beam emitted from the galvanometer lens 410.

[0076] See Figure 18 and Figure 19 As shown, the aforementioned protection mechanism 600 includes a protective lens 610 that blocks the second opening 113, which is located on the light-emitting side of the field lens 510. The laser beam focused by the field lens 510 exits the laser cleaning head through the protective lens 610. The protective lens 610 is assembled with the housing 110, making the internal accommodating space 111 of the housing 110 a sealed space. This prevents dust from entering the accommodating space 111 during the cleaning process, protecting the galvanometer lens 410 and the field lens 510 located within the accommodating space 111, and improving their service life.

[0077] Understandably, the collimating lens module 200, galvanometer module 400, and protective mechanism 600 described above are modular structures. The overall structure of the laser cleaning head is simple and easy to process. The protective lens 610 and collimating lens module 200 respectively seal the second opening 113 and the first opening 112 on the housing 110. The galvanometer lens 410 and the field lens 510 are located in the sealed accommodating space 111, preventing dust and debris generated during the workpiece cleaning process from entering the housing 110, protecting the galvanometer lens 410 and the field lens 510, and improving the service life of important optical components in the laser cleaning head. The heat dissipation mechanism 120 dissipates heat from the housing 110, removing the heat generated by the high-efficiency operation of the laser cleaning head, preventing the collimating lens module 200, galvanometer module 400, and field lens module 500 from burning out due to high heat, protecting the normal operation of the laser cleaning head, and improving the power and cleaning efficiency of the laser cleaning head.

[0078] In some implementations, see Figure 2 As shown, the high-power laser cleaning head also includes a mirror module 300, which is connected to the housing 110. The mirror module 300 has a mirror 310, which is located in the receiving space 111. The mirror 310 is located in the optical path of the collimating mirror module 200, and the galvanometer lens 410 receives the reflected light from the mirror 310.

[0079] Understandably, without the reflector module 300, the first opening 112 and the second opening 113 are located on adjacent sides of the housing 110, and the light output direction of the collimating lens module 200 is at 90° to the light output direction of the laser cleaning head. By setting the reflector module 300, the laser transmission direction is changed. Along the light output direction of the laser cleaning head, the first opening 112 and the second opening 113 are positioned opposite each other, thus changing the external structure of the laser cleaning head to suit different working conditions and broaden its application range.

[0080] Based on the above implementation method, see Figures 12 to 17 As shown, the reflector module 300 also includes a reflector base 320, which has a second inlet 321 and a second outlet 322. The reflector base 320 has a second channel 323. The reflector 310 is installed on the reflector base 320. The housing 110 also has a third opening 114. The reflector base 320 blocks the third opening 114. The second inlet 321, the second outlet 322 and the second channel 323 are connected. The second inlet 321 and the second outlet 322 are used to connect to an external water chiller. The cold water flowing in the second channel 323 carries away the temperature of the reflector base 320, cools the reflector 310, prevents the reflector 310 from burning out due to high temperature, protects the reflector 310 and improves the service life of the reflector 310.

[0081] See Figure 14As shown, the aforementioned reflector base 320 includes a first base plate 3200 and a protrusion 3201. The protrusion 3201 is disposed on the first base plate 3200. A slope is provided on the side of the protrusion 3201 facing away from the first base plate 3200, and a mounting groove 3203 is provided on the slope. The reflector 310 is glued to the groove wall of the mounting groove 3203. The shape of the mounting groove 3203 is adapted to the shape and size of the reflector 310. For example, if the reflector 310 is circular, the corresponding mounting groove 3203 is also circular. The slope direction and angle are also specified. The angle is set according to the required reflection angle of the reflector 310. The second inlet 321 and the second outlet 322 are opened on the first base plate 3200. The second channel 323 is located inside the protrusion 3201. The first base plate 3200 is provided with a flange connecting plate around the protrusion 3201. The flange connecting plate of the first base plate 3200 is connected to the housing around the third opening 114, sealing the third opening 114 of the housing 110. The reflector module 300 has a simple structure, is easy to process, and is easy to assemble and disassemble with the housing 110, which facilitates subsequent maintenance.

[0082] Based on the above implementation method, see Figure 13 As shown, the reflector module 300 also includes a first temperature measuring mechanism 330, which is disposed on the reflector base 320 and used to detect the temperature of the reflector 310. The first temperature measuring mechanism 330 can be a thermometer. Understandably, by detecting the temperature of the reflector base 320 through the first temperature measuring mechanism 330, when the detected temperature of the reflector 310 is higher than a set temperature value, the laser is controlled to stop emitting light, preventing the reflector 310 from burning out due to high temperature. This improves the reliability of the laser cleaning head and facilitates troubleshooting.

[0083] See Figure 14 and Figure 15 As shown, the reflector base 320 is provided with a first mounting hole 324 and a first screw hole 325. The first temperature measuring mechanism 330 is installed in the first mounting hole 324. The first screw hole 325 extends radially along the first mounting hole 324 and communicates with the first mounting hole 324. A first screw is installed in the first screw hole 325. The first temperature measuring mechanism 330 is fixed by the first screw, which facilitates the installation and maintenance of the first temperature measuring mechanism 330.

[0084] Based on the above implementation method, see Figure 13 , Figure 14 and Figure 15 As shown, the reflector module 300 also includes a first light metering mechanism 340, which is disposed on the reflector base 320 and located on the back of the reflector 310. The first light metering mechanism 340 is used to detect the light intensity of the forward light passing through the reflector 310. The first light metering mechanism 340 is a photodiode.

[0085] Understandably, when reflector 310 is damaged, its reflectivity decreases, and the amount of forward light passing through it increases. By setting a photodiode on the back of reflector 310, the intensity of the forward light passing through reflector 310 is detected. When the intensity exceeds the set intensity, it indicates that reflector 310 is damaged. The control system of the laser cleaning head then controls the laser to stop emitting light and provides a fault indication of the cause of the damage to reflector 310, facilitating troubleshooting and ensuring the reliable performance of the laser cleaning head.

[0086] See Figure 14 and Figure 15 As shown, the reflector base 320 is provided with a second mounting hole 326 and a second screw hole 327. The first photometric mechanism 340 is installed in the second mounting hole 326. The second screw hole 327 extends radially along the second mounting hole 326 and communicates with the second mounting hole 326. A second screw is installed in the second screw hole 327, and the first photometric mechanism 340 is fixed by the second screw.

[0087] See Figure 12 As shown, a first light-shielding plate 328 is provided on the reflector base 320. The first light-shielding plate 328 blocks the end of the second mounting hole 326 away from the reflector 310. The light intensity incident on the first light-measuring mechanism 340 is reduced by the first light-shielding plate 328, thereby improving the detection accuracy of the first light-measuring mechanism 340.

[0088] The first photometric mechanism 340 and the first temperature measuring mechanism 330 mentioned above are integrated on the reflector base 320. The overall structure of the reflector module 300 is compact, easy to install and disassemble, and convenient for the assembly and maintenance of the laser cleaning head.

[0089] In some implementations, see Figure 10 and Figure 11 As shown, the galvanometer module 400 described above also includes:

[0090] Galvanometer motor 420, the output end of galvanometer motor 420 is connected to galvanometer lens 410;

[0091] The galvanometer mounting base 430 is sleeved on the galvanometer motor 420 and fixed to the housing 110. The housing 110 is provided with a fourth opening 115, and the galvanometer lens 410 extends from the fourth opening 115 into the receiving space 111.

[0092] See Figure 3 and Figure 4As shown, the aforementioned housing 110 has a first side 1100, a second side 1101, a third side 1102, a fourth side 1103, a fifth side 1104, and a sixth side 1105. The first side 1100 and the sixth side 1105 are arranged opposite each other. A first opening 112 is formed on the first side 1100, and the collimating lens module 200 is connected to the first side 1100 of the housing 1100. A second opening 113 is formed on the sixth side 1105. The second side 1101 and the fourth side 1103 are arranged opposite each other. The third side 1102 and the sixth side 1105 are arranged opposite each other. Five sides 1104 are arranged opposite each other. The second side 1101 is arranged adjacent to the first side 1100 and the second side 1101. A third opening 114 is opened on the second side 1101. The reflector module 300 is connected to the second side 1101 of the housing 110. The reflector base 320 encloses the third opening 114. A fourth opening 115 is opened on the third side 1102. The galvanometer mounting base 430 is connected to the third side 1102 of the housing 110. The galvanometer mounting base 430 encloses the third opening 114. The galvanometer lens 410 extends from the fourth opening 115 into the receiving space 111.

[0093] See Figure 11 As shown, the galvanometer mounting base 430 has a first semi-cylindrical body 431, a second semi-cylindrical body 432, and a third cylindrical body 433. The cross-sectional shape of the first semi-cylindrical body 431 and the second semi-cylindrical body 432 is semi-circular. The first semi-cylindrical body 431 and the second semi-cylindrical body 432 are arranged in a cylindrical shape and are fitted on the galvanometer motor 420. The end of the first semi-cylindrical body 431 facing away from the galvanometer lens 410 is provided with a first edge protruding radially outward. The end of the third cylindrical body 433 facing the third side 1102 is provided with a circular flange connecting plate. The third cylindrical body 433 is connected to the housing 110 around the third opening 114 through the flange connecting plate. The third cylindrical body 433 is fitted on the first semi-cylindrical body 431 and the second semi-cylindrical body 432. The end of the third cylindrical body 433 facing away from the housing 110 is provided with a second edge protruding radially outward. The first edge and the second edge are connected by bolts.

[0094] Understandably, the galvanometer module 400, including the galvanometer lens 410, galvanometer motor 420, and galvanometer mounting base 430, is assembled as a single unit. When assembled with the housing 110, it is connected via a circular flange connecting plate at the end of the third cylinder 433. The installation structure is simple and easy to disassemble and maintain.

[0095] Additionally, see Figure 11As shown, a second temperature measuring mechanism 440 can also be set on the galvanometer mounting base 430. The second temperature measuring mechanism 440 can be a thermometer used to detect the temperature of the galvanometer mounting base 430. The second temperature measuring mechanism 440 is connected to the control system of the laser cleaning head. The control system of the laser cleaning head judges the working status of the galvanometer module 400 based on the temperature signal detected by the second temperature measuring mechanism 440. When the temperature signal value is greater than the set temperature value, the control system of the laser cleaning head controls the laser to stop emitting light, which can protect the galvanometer module 400, prevent the galvanometer module 400 from burning out, and improve the reliability of the laser cleaning head.

[0096] Based on the above implementation methods, see [link to implementation details]. Figure 9 As shown, the heat dissipation mechanism 120 includes a first inlet 121, a first outlet 122, and a first channel 123. The first inlet 121 and the first outlet 122 are both opened on the housing 110. The first channel 123 is disposed inside the housing 110. The first channel 123 is partially arranged around the fourth opening 115. The first inlet 121 and the first outlet 122 are connected to the first channel 123. The first inlet 121 and the first outlet 122 are used to connect to an external water chiller.

[0097] Understandable, see Figure 7 and Figure 9 As shown, the first channel 123 includes a first sub-channel 1230, a second sub-channel 1231, a third sub-channel 1232, a fourth sub-channel 1233, a fifth sub-channel 1234, and a sixth sub-channel 1235 connected sequentially from the first inlet 121 to the first outlet 122. The first sub-channel 1230 and the sixth sub-channel 1235 are located within the side wall of the fourth side 1103 of the housing 110. The first inlet 121 and the first outlet 122 are located on the side wall of the fifth side 1104. The second sub-channel 1231... The third sub-channel 1232, the fourth sub-channel 1233, and the fifth sub-channel 1234 are located inside the side wall of the third side 1102 of the housing 110. They are arranged near the four sides of the third side 1102. In addition, the control circuit board of the laser cleaning head is also located on the third side 1102. The third side 1102 generates a lot of heat, so there are more water-cooling channels to better dissipate heat and improve the cooling effect. The arrangement of the first channel 123 is reasonable and the structure is compact, which improves the service life and reliability of the laser cleaning head.

[0098] In some implementations, see Figure 2 and Figure 4 As shown, the field lens module 500 also includes a water-cooled plate 520. A fifth opening 116 is provided on the housing 110. The water-cooled plate 520 blocks the fifth opening 116. The field lens 510 is attached to the water-cooled plate 520.

[0099] The water-cooled plate 520 has a third inlet and a third outlet. The water-cooled plate 520 has a third channel inside. The third inlet and the third outlet are connected to the third channel and connected to an external water chiller. The fifth opening 116 is located on the fifth side 1104 of the housing 110. The water-cooled plate 520 blocks the fifth opening and is connected to the housing 110 around the fifth opening 116. The side of the water-cooled plate 520 away from the field lens 510 has heat dissipation fins. The water-cooled plate 520 dissipates heat from the field lens 510, protecting the field lens 510 and preventing it from burning out.

[0100] Understandably, the collimating lens module 200, reflecting mirror module 300, and field lens module 500 are respectively disposed on the first side 1100, the second side 1101, and the fifth side 1104 of the housing 110. The collimating lens module 200, reflecting mirror module 300, and field lens module 500 are all provided with water-cooling channels to dissipate heat from the collimating lens, reflecting mirror 310, and field lens 510, protecting the main optical components inside the laser cleaning head. The first channel 123 of the heat dissipation mechanism 120 is arranged on the third side 1102 and the fourth side 1103 to dissipate heat from the galvanometer module 400, the housing 110, and the field lens 510. Except for the light-emitting side, the housing 110 is provided with a water-cooling structure. The heat dissipation structure is reasonably arranged and cleverly designed to meet the heat dissipation requirements of the high-power laser cleaning head and improve the reliability of the high-power laser cleaning head.

[0101] Additionally, see Figure 5 and Figure 11 As shown, the housing 110 is provided with an ear plate 1112, which divides the accommodating space 111 into a first region 1110 and a second region 1111. The first region 1110 and the second region 1111 are connected and are arranged sequentially along the laser transmission direction. The aforementioned reflector 310 and galvanometer lens 410 are both located in the first region 1110, and the field lens 510 is located in the second region 1111. The end of the field lens 510 closest to the first region 1110 is sealed to the ear plate 1112 to prevent dust and debris from entering the first region 1110 from the second region 1111 and damaging the optical components in the first region 1110. A thermally conductive silicone pad is provided between the ear plate 1112 and the end of the field lens 510. The thermally conductive silicone pad can also transfer the heat of the field lens 510 to the housing 110 to protect the field lens 510.

[0102] In some implementations, see Figure 18 and Figure 19As shown, the protective mechanism 600 also includes a cover plate 630 and a protective lens mounting base 620. The cover plate 630 has a first window 631 corresponding to the second opening 113. The protective lens mounting base 620 has a connecting part 621 and a frame 622. The connecting part 621 is connected to the frame 622. The connecting part 621 is a flange connecting plate with the end of the frame. The frame 622 has a second window 623 corresponding to the second opening 113. The cover plate 630 and the frame 622 clamp and fix the protective lens 610. The housing 110 has a groove 117. The groove 117 extends from the third side 1102 side opening of the housing 110 to the fifth side 1104 side. The groove 117 is a cuboid. The cuboid structure formed by the connection of the frame 622, the cover plate 630 and the protective lens 610 is located in the groove 117. The connecting part 621 is detachably connected to the housing 110. After the protection mechanism 600 is assembled into an integral structure, it is assembled with the housing 110. The protection mechanism 600 can be installed and disassembled as a whole, which facilitates the subsequent replacement of the protection mechanism 600.

[0103] In some implementations, see Figure 1 , Figure 3 and Figure 20 As shown, the high-power laser cleaning head also includes a photometer module 700. A sixth opening 118 is provided on the housing 110. The sixth opening 118 is opposite to the second opening 113. The photometer module 700 blocks the sixth opening 118 and is used to detect the light intensity of the reflected light in the accommodating space 111.

[0104] It is understandable that when the high-power laser head is used, when the laser hits the surface of the workpiece, a portion of the laser light reflected from the surface enters the laser cleaning head from the protective lens 610 side. Due to the high power of the high-power laser cleaning head, the reflected light can cause the housing 110 and the components inside the housing 110 to heat up, which may damage the laser cleaning head. In order to ensure the reliability of the laser cleaning head, the intensity of the reflected light inside the housing 110 is detected by the photometer module 700. The photometer module 700 is connected to the control system of the laser cleaning head. The control system of the laser cleaning head controls the operation of the laser cleaning head according to the detected intensity of the reflected light. When the intensity of the reflected light is too high, the laser is stopped from emitting light, and the angle of the laser cleaning head is adjusted to protect the laser cleaning head.

[0105] Based on the above implementation method, see Figure 21 and Figure 22As shown, the photometering module 700 includes a photometering diode 710, a photometering mounting block 720, and a light-blocking plate 730. The photometering diode 710 is used to detect the light intensity of the reflected light within the accommodating space 111. The photometering mounting block 720 has a flange connecting plate and blocks the sixth opening 118. The flange connecting plate of the photometering mounting block 720 is connected to the housing 110 surrounding the sixth opening 118. The photometering mounting block 720 has a mounting hole 721 on one side of the accommodating space 111, and the photometering diode 710 is installed in the mounting hole 721. The light-blocking plate 730 is connected to the photometering mounting block 720. A light-blocking plate 730 blocks the mounting hole 721. The wires of the photodiode 710 are led out of the housing 110 from the back of the light-blocking plate 730. The light-blocking plate 730 protects the photodiode 710 and the wiring from being burned by the reflected light. The light-blocking plate 730 is provided with a light-penetrating hole 731, which is positioned opposite to the photodiode 710. A light-shielding plate 732 is provided on the light-penetrating hole 731. The reflected light inside the housing 110 passes through the light-shielding plate 732 and shines on the photodiode 710. The intensity of the reflected light shining on the photodiode 710 is weakened by physical means, thereby improving the detection accuracy of the photodiode 710.

[0106] The aforementioned photometric module 700 is an integral structure and is connected to the housing 110 via a flange connection. The structure is simple, the laser cleaning head is easy to process, and the photometric module 700 is easy to replace and maintain.

[0107] In some implementations, see Figure 1 and Figure 2 As shown, the high-power laser cleaning head also includes an air knife dust extraction assembly 800, which has an air knife mechanism 810 and a dust extraction mechanism 820.

[0108] See Figure 23 As shown, the air knife mechanism 810 includes a bracket 811 and a plurality of air knives 812. The bracket 811 is located on the light-emitting side of the second opening 113 and is connected to the housing 110. The plurality of air knives 812 are spaced apart on the bracket 811 along the light-emitting direction of the second opening 113. The air knives 812 blow out airflow along the width direction of the second opening 113, wherein the width direction of the second opening 113 refers to the direction of the housing 110 from the fifth side 1104 to the third side 1102. The air knives 812 blow out air curtains on the second opening 113 side to prevent dust and debris from accumulating on the protective mirror 610 and the field mirror 510.

[0109] See Figure 23As shown, the dust extraction mechanism 820 includes a connecting rod 821 and an exhaust nozzle 822. One end of the connecting rod 821 is connected to the housing 110, and the other end of the connecting rod 821 is connected to the exhaust nozzle 822. The exhaust nozzle 822 is located on the light-emitting side of the second opening 113. The exhaust nozzle 822 is arranged opposite to the air knife 812. The air knife 812 blows air towards the exhaust nozzle 822, blowing dust and debris generated during the laser cleaning head cleaning process towards the exhaust nozzle 822. The exhaust nozzle 822 sucks up the dust, protecting the protective mirror 610 and field mirror 510 inside the laser cleaning head from contamination or damage by debris and dust generated during processing, thereby improving the working accuracy and service life of the laser head.

[0110] Based on the above implementation method, see Figure 24 and Figure 25 As shown, the air knife 812 includes a body 8120, on which an air inlet 8121 and an air outlet 8122 are provided. An air cavity 8123 is formed inside the body 8120. The air inlet 8121 and the air outlet 8122 are respectively connected to the air cavity 8123. A long side wall 81220 of the air outlet 8122 extends a certain distance away from the body 8120 along the airflow direction. The ratio of the distance L1 of the side wall 81220 to the width L2 of the air outlet 8122 is between 3 and 200.

[0111] Understandably, extending one side wall 81220 of the air outlet 8122 to form the Coanda effect results in minimal airflow velocity loss and significantly increases the air pressure of the gas flowing out of the air outlet 8122. The air pressure flowing out of the air outlet 8122 is 40 times that of the air pressure of the air inlet 8121, preventing dust and residue splashed from the workpiece surface during processing from falling onto the surface of the protective mirror 610 and avoiding damage to the protective mirror 610.

[0112] Based on the above implementation, the ratio of the distance the sidewall 81220 extends to the width of the outlet 8122 is proportional to the gas pressure of the gas flowing out of the outlet 8122.

[0113] The ratio of the extension distance of the side wall 81220 to the width of the air outlet 8122 can be adjusted as needed to design different air knife 812 structures.

[0114] Based on the above implementation, the sidewall 81220 extends by a distance between 1 and 10 millimeters.

[0115] Based on the above implementation method, the width of the air outlet 8122 is between 0.05 and 0.3 mm.

[0116] Based on the above implementation method, see Figure 26As shown, the main body 8120 includes a first plate 8124 and a second plate 8125. The second plate 8125 is detachably connected to the first plate 8124. The first plate 8124 and the second plate 8125 enclose an air cavity 8123. An air inlet 8121 is provided on the second plate 8125. The end of the second plate 8125 away from the air inlet 8121 forms an air outlet 8122 with the side wall of the first plate 8124. The first plate 8124 extends out of the second plate 8125.

[0117] Understandably, the main body 8120 can be designed as an integral structure or as a split structure. In the embodiments of this application, the main body 8120 is composed of a first plate 8124 and a second plate 8125 that can be detachably connected. The first plate 8124 and the second plate 8125 have simple structures and are easy to process.

[0118] Based on the above embodiment, a gasket is provided between the first plate 8124 and the second plate 8125. One side of the gasket is attached to the first plate 8124, and the other side is attached to the second plate 8125. The end of the second plate 8125, the end of the gasket, and the side wall of the first plate 8124 enclose each other to form an air outlet 8122.

[0119] Understandably, by providing a gasket between the first plate 8124 and the second plate 8125, the width of the air outlet 8122 can be adjusted, thus expanding the applicability of the air knife 812. Furthermore, the connection between the first plate 8124 and the second plate 8125 is sealed by the gasket, resulting in good sealing performance of the air knife 812.

[0120] Based on the above embodiments, the first plate 8124 includes a flat plate and a side plate. The flat plate is disposed opposite to the second plate, and the side plate is disposed on the side of the flat plate facing the second plate. The side plate is attached to the second plate, and the flat plate, the side plate and the second plate surround to form an air outlet 8122. The thickness of the side plate is the same as the width of the air outlet 8122, and the flat plate and the second plate are separated by the side plate.

[0121] Additionally, see Figure 1 and Figure 23 As shown, the air knife mechanism 810 described above is equipped with three air knives 812, namely the first air knife, the second air knife, and the third air knife. The first air knife, the second air knife, and the third air knife are arranged at intervals on the bracket 811. The first air knife is close to the protective mirror 610, and the third air knife is far away from the protective mirror 610. The third air knife is opposite to the exhaust nozzle 822. The third air knife is connected to the bracket 811 through the adapter block 813. The angle between the third air knife and the workpiece surface is adjusted by the adapter block 813 to promptly blow away the primary dust and residue generated during the cleaning process, resulting in good dust removal effect.

[0122] A connecting block 130 is provided on the fifth side 1104 of the aforementioned housing 110. The connecting block 130 is used to connect with a moving linear module or a robot. The moving linear module or robot drives the laser cleaning head to move as a whole. The side of the connecting block 130 facing away from the housing 110 is inclined. The end of the connecting block 130 near the light-emitting side of the laser cleaning head is inclined towards the housing 110. The inclination angle is between 5° and 15°. In use, this makes the laser emitted by the laser cleaning head form a certain angle with the surface of the workpiece, improving the cleaning effect while reducing the generation of backlight.

[0123] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0124] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0125] The high-power laser cleaning head provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A high-power laser cleaning head, characterized in that, include: A housing assembly has a housing and a heat dissipation mechanism. The housing has an accommodating space, and the housing has a first opening and a second opening. The heat dissipation mechanism is disposed on the housing and is used to dissipate heat from the housing. A collimating lens module is connected to the housing. The light outlet of the collimating lens module is positioned opposite to the first opening. The collimating lens module is used to connect to an external laser. A galvanometer module is connected to the housing. The galvanometer module has galvanometer lenses, which are located within the receiving space and are positioned behind the collimating lens module. A field lens module is connected to the housing. The field lens module has a field lens located within the receiving space and behind the galvanometer lens. The protective mechanism includes a protective lens that blocks the second opening to make the receiving space a sealed space. Also includes: A reflector module is connected to the housing. The reflector module has a reflector located within the receiving space and in the optical path of the collimating mirror module. The galvanometer mirror receives the reflected light from the reflector. The reflector module also includes: The reflector base has a second inlet, a second outlet and a second channel, the second inlet and the second outlet are connected to the second channel, the reflector is installed on the reflector base, and the housing also has a third opening, which is blocked by the reflector base. The galvanometer module also includes: A galvanometer motor, the output of which is connected to the galvanometer lens; A galvanometer mounting base is sleeved on the galvanometer motor. The galvanometer mounting base is fixed to the housing. The housing has a fourth opening. The galvanometer lens extends from the fourth opening into the receiving space. The heat dissipation mechanism includes: The first inlet is located on the housing; The first outlet is located on the housing; A first channel is provided on the housing, and the first channel portion is arranged around the fourth opening. The first inlet and the first outlet are connected to the first channel, and the first inlet and the first outlet are used to connect to an external water chiller. The field lens module also includes: A water-cooled plate is provided, and a fifth opening is provided on the housing. The water-cooled plate seals the fifth opening, and the field lens is attached to the water-cooled plate.

2. The high-power laser cleaning head according to claim 1, characterized in that, The reflector module also includes: The first temperature measuring mechanism is disposed on the reflector base and is used to detect the temperature of the reflector; And / or, a first light metering mechanism is disposed on the base of the reflector and located on the back of the reflector. The first light metering mechanism is used to detect the light intensity of the forward light passing through the reflector.

3. The high-power laser cleaning head according to claim 1, characterized in that, The protection mechanism also includes: The cover plate has a first window corresponding to the second opening; The protective lens holder has a connecting part and a frame. The connecting part is connected to the frame. The frame has a second window corresponding to the second opening. The cover plate clamps and fixes the protective lens to the frame. The housing has a groove. The frame, cover plate and protective lens are located in the groove. The connecting part is detachably connected to the housing.

4. The high-power laser cleaning head according to claim 1, characterized in that, Also includes: The light metering module has a sixth opening on its housing, which is opposite to the second opening. The light metering module blocks the sixth opening to detect the light intensity of the reflected light within the accommodating space.

5. The high-power laser cleaning head according to claim 4, characterized in that, The photometric module includes: A photodiode is used to detect the intensity of reflected light within the accommodating space; A photometer mounting block blocks the sixth opening. The photometer mounting block has a mounting hole on one side of the accommodating space, and the photometer diode is installed in the mounting hole. A light-blocking plate is connected to the photometer mounting block to block the mounting hole. The light-blocking plate is provided with a light-transmitting hole, which is arranged opposite to the photometer diode. A light-shielding sheet is provided on the light-transmitting hole.

6. The high-power laser cleaning head according to claim 1, characterized in that, It also includes an air knife dust extraction component, which has: An air knife mechanism includes a bracket and multiple air knives. The bracket is located on the light-emitting side of the second opening and is connected to the housing. The multiple air knives are spaced apart on the bracket along the light-emitting direction of the second opening, and the air knives blow air in the direction of the width of the second opening. The dust extraction mechanism is located on the light-emitting side of the second opening and is positioned opposite to the air knife.

7. The high-power laser cleaning head according to claim 6, characterized in that, The air knife includes: The body has an air inlet and an air outlet, and an air cavity is formed inside the body. The air inlet and the air outlet are respectively connected to the air cavity. A long side wall of the air outlet extends away from the body along the airflow direction. The ratio of the distance the side wall extends to the width of the air outlet is between 3 and 200.

Images