A 3D laser cutting head with built-in lens contamination monitoring

Abstract

The present invention discloses a three-dimensional laser cutting head with built-in lens contamination monitoring, comprising a shell, a laser channel is vertically opened upward from the bottom of the shell, a laser generator is fixedly connected to the top of the laser channel, a detection slot is opened in the laser channel below the laser generator, and one pair of opposite side walls of the detection slot are each opened with an L-shaped track slot; a pollution monitoring unit, which includes a light lamp and a photoreceptor, and the light lamp and the photoreceptor are respectively arranged on both sides of the L-shaped track slot. The present invention relates to the technical field of laser cutting heads. The three-dimensional laser cutting head with built-in lens contamination monitoring can be used to detect contaminants on the protective lens through the provided pollution monitoring unit, thereby detecting the use of the laser cutting head, and the provided cleaning structure can clean the protective lens with relatively light pollution while moving the protective lens into the pollution monitoring unit, so as to extend the service life of the protective lens.

Description

Technical Field

[0001] The invention relates to the technical field of laser cutting heads, and in particular to a three-dimensional laser cutting head with built-in lens contamination monitoring. Background Art

[0002] The laser cutting head is one of the core components of the laser cutting machine, which directly affects the cutting accuracy, efficiency and cutting quality of the material. The laser cutting head achieves high-precision cutting and drilling of the material by focusing the laser beam and controlling the position of the focus. In general, the laser cutting head is the core of the laser cutting equipment, and its design and maintenance directly determine the working efficiency and cutting quality of the equipment.

[0003] In the prior art, in laser processing equipment (such as laser cutting machines or laser welding machines), lenses are key optical components used to focus, reflect or conduct laser beams. Therefore, a protective lens is set in the laser cutting head to protect the lens module. During the laser cutting process, a large amount of slag, dust and other pollutants will be generated. These pollutants will float into the cutting head, causing pollutants to adhere to the surface of the protective lens. These pollutants will affect the transmission efficiency of the laser and reduce the cutting accuracy. Therefore, monitoring lens contamination is the key to ensuring stable equipment performance and extending the life of the lens.

[0004] Therefore, those skilled in the art provide a three-dimensional laser cutting head with built-in lens contamination monitoring to solve the problems raised in the above background technology. Summary of the invention

[0005] The purpose of the present invention is to provide a three-dimensional laser cutting head with built-in lens contamination monitoring to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The above technical objectives of the present invention are achieved through the following technical solutions:

[0008] A three-dimensional laser cutting head with built-in lens contamination monitoring comprises a shell, a laser channel is vertically opened at the bottom of the shell, a laser generator is fixedly connected to the top of the laser channel, a detection groove is opened in the laser channel below the laser generator, and one pair of opposite side walls of the detection groove are both opened with L-shaped track grooves;

[0009] The pollution monitoring unit includes a light and a photoreceptor, which are respectively arranged on both sides of the L-shaped track groove and are respectively fixedly connected to the side walls of the detection groove;

[0010] A power assembly, whose output end is connected to the top of the laser generator and whose fixed end is fixedly connected to the mechanical arm;

[0011] The cleaning mechanism includes a mounting frame, a scraper, a driving unit and a negative pressure unit. A mounting groove for mounting a protective lens is provided in the middle of the mounting frame. Limit rods are rotatably connected to both sides of the outer wall of the mounting frame. Both ends of the limit rods are slidably connected to two L-shaped track grooves respectively. The driving unit is arranged in the vertical section of the L-shaped track groove and is connected to one of the limit rods. The inner wall of the detection groove is located below the mounting frame and is rotatably connected to a scraper. The tip of the scraper contacts the mounting frame. An air suction cavity is hollowly provided in the scraper. An air inlet groove penetrating the scraper is provided near the tip of the air suction cavity. The outer wall of the shell is connected to the negative pressure unit, and the negative pressure unit is communicated with the air inlet groove.

[0012] Furthermore, the negative pressure unit includes a negative pressure hood, a rubber sleeve, a partition and an L-shaped connecting rod. The negative pressure hood is fixedly connected to the shell, a negative pressure chamber is opened in the negative pressure hood, a partition is fixedly connected in the negative pressure chamber, a rubber sleeve is slidably connected below the partition in the negative pressure chamber, an L-shaped connecting rod is fixedly connected to the top of the rubber sleeve, the L-shaped connecting rod passes through the partition and is rotatably connected to the scraper, and an airway connected to the suction chamber is jointly opened in the middle of the rubber sleeve and in the L-shaped connecting rod.

[0013] Furthermore, the rubber sleeve gradually tilts downward from the inside to the outside so that a cavity for exhaust is formed between the top of the rubber sleeve and the partition, the negative pressure cover is provided with a one-way valve for exhaust at the cavity, and the bottom of the L-shaped connecting rod is provided with a through groove connected to the airway at the cavity.

[0014] Furthermore, the tip of the scraper is provided with an elastic portion, and the elastic portion covers the opening of the air inlet groove.

[0015] Furthermore, the thickness of the protective lens is greater than the thickness of the mounting frame, the bottom of the mounting frame protrudes downward to form a truncated cone that wraps the lens, and the outer wall of the truncated cone is processed with an inclined surface.

[0016] Furthermore, the driving unit includes a driving motor, a screw and a slider. The driving motor is fixedly connected to the bottom of the vertical section of the L-shaped track groove, the output end of the driving motor is fixedly connected to the screw, the outer wall of the screw is threadedly connected to the slider, and the side wall of the slider is fixedly connected to the limit rod.

[0017] Furthermore, the power assembly includes a B-axis motor and a C-axis motor, the C-axis motor is fixedly connected to the robot arm, the output end of the C-axis motor is fixedly connected to the B-axis motor, and the output end of the B-axis motor is fixedly connected to the shell.

[0018] In summary, the present invention includes at least one of the following beneficial technical effects:

[0019] 1. A three-dimensional laser cutting head with built-in lens contamination monitoring can be used to detect contaminants on the protective lens through the provided contamination monitoring unit, thereby detecting the use of the laser cutting head, and the provided cleaning structure can clean the protective lens with relatively light contamination while moving the protective lens into the contamination monitoring unit, thereby extending the service life of the protective lens;

[0020] 2. This three-dimensional laser cutting head with built-in lens contamination monitoring can, through the set negative pressure unit, suck the pollutants into the negative pressure chamber after the scraper scrapes off the pollutants, so as to avoid the pollutants remaining on the scraper and causing secondary contamination of the protective lens when the protective lens moves, which can effectively ensure the cleaning effect of the scraper. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a three-dimensional laser cutting head with built-in lens contamination monitoring according to the present invention.

[0023] Figure 2 It is a schematic diagram of the internal structure of a shell in a three-dimensional laser cutting head with built-in lens contamination monitoring according to the present invention.

[0024] Figure 3 It is a structural schematic diagram of a track groove in a three-dimensional laser cutting head with built-in lens contamination monitoring according to the present invention.

[0025] Figure 4 It is a structural schematic diagram of a cleaning mechanism in a three-dimensional laser cutting head with built-in lens contamination monitoring according to the present invention.

[0026] Figure 5 It is a structural schematic diagram of a negative pressure unit in a three-dimensional laser cutting head with built-in lens contamination monitoring according to the present invention.

[0027] Figure 6 It is a schematic diagram of the initial state of a protective lens in a three-dimensional laser cutting head with built-in lens contamination monitoring according to the present invention.

[0028] Figure 7 It is a schematic diagram of the state of a protective lens in a three-dimensional laser cutting head with built-in lens contamination monitoring during the flipping process of the lens of the present invention.

[0029] Figure 8It is a schematic diagram of the state after the protective lens in a three-dimensional laser cutting head with built-in lens contamination monitoring of the present invention is turned over.

[0030] Fig. 9 yes Figure 6 Enlarged view of point A in the middle.

[0031] In the figure, 1. shell; 2. pollution monitoring unit; 21. light; 22. photoreceptor; 3. power assembly; 31. B-axis motor; 32. C-axis motor; 4. cleaning mechanism; 41. mounting frame; 42. scraper; 43. drive unit; 431. drive motor; 432. lead screw; 433. slider; 44. negative pressure unit; 441. negative pressure cover; 442. rubber sleeve; 443. partition; 444. L-shaped connecting rod; 5. laser channel; 6. laser generator; 7. detection slot; 8. L-shaped track slot; 9. mounting slot; 10. limit rod; 11. suction chamber; 12. air inlet slot; 13. negative pressure chamber; 14. airway; 15. cavity; 16. one-way valve; 17. through slot; 18. elastic part; 19. round table. DETAILED DESCRIPTION

[0032] The present invention is further described below with reference to the accompanying drawings and specific embodiments: Example:

[0033] Reference Figure 1 - Fig. 9 The present invention discloses a three-dimensional laser cutting head with built-in lens contamination monitoring, comprising a housing 1, a laser channel 5 is vertically opened at the bottom of the housing 1, a laser generator 6 is fixedly connected to the top of the laser channel 5, a detection slot 7 is opened below the laser generator 6 in the laser channel 5, and an L-shaped track slot 8 is opened on one pair of opposite side walls of the detection slot 7;

[0034] The pollution monitoring unit 2 includes a light 21 and a photoreceptor 22. The light 21 and the photoreceptor 22 are respectively arranged on both sides of the L-shaped track groove 8 and are respectively fixedly connected to the side walls of the detection groove 7;

[0035] A power assembly 3, whose output end is connected to the top of the laser generator 6, and whose fixed end is fixedly connected to the mechanical arm;

[0036] The cleaning mechanism 4 includes a mounting frame 41, a scraper 42, a drive unit 43 and a negative pressure unit 44. A mounting groove 9 for mounting a protective lens is provided in the middle of the mounting frame 41. Limit rods 10 are rotatably connected to both sides of the outer wall of the mounting frame 41. Both ends of the limit rods 10 are slidably connected to two L-shaped track grooves 8 respectively. The drive unit 43 is arranged in the vertical section of the L-shaped track groove 8 and is connected to one of the limit rods 10. The inner wall of the detection groove 7 is located below the mounting frame 41 and is rotatably connected to the scraper 42. The tip of the scraper 42 contacts the mounting frame 41. An air suction cavity 11 is hollowly provided in the scraper 42. An air inlet groove 12 that passes through the scraper 42 is provided near the tip of the air suction cavity 11. The outer wall of the shell 1 is connected to the negative pressure unit 44, and the negative pressure unit 44 is connected to the air inlet groove 12.

[0037] In this embodiment, observe Figure 1 and Figure 2 It can be found that through the setting of the shell 1, a laser channel 5 is vertically opened at the bottom of the shell 1, and a laser generator 6 is fixedly connected to the top of the laser channel 5, which can be used to emit a high-energy laser beam to realize the function of laser cutting. A detection groove 7 is opened below the laser generator 6 in the laser channel 5, and a protective lens is provided on the top of the detection groove 7, which can be used to provide protection for the laser generator 6.

[0038] During the laser cutting process, a large amount of slag, dust and other pollutants will be generated. These pollutants will float into the cutting head, causing the surface of the protective lens to adhere to pollutants. These pollutants will affect the transmission efficiency of the laser and reduce the cutting accuracy. Figure 2 and Figure 3 It can be found that an L-shaped track groove 8 is opened in one pair of opposite side walls of the detection groove 7, and then an installation frame 41 is arranged in the detection groove 7. The outer walls of the installation frame 41 are rotatably connected to the limit rods 10 on both sides, and the two ends of the limit rods 10 are respectively slidably connected to the two L-shaped track grooves 8, so that when the limit rods 10 slide in the L-shaped track grooves 8, the protective lens is flipped from a horizontal state to a vertical state. Then, an illumination lamp 21 is fixedly connected to the side wall in the detection groove 7, and a photoreceptor 22 is fixedly connected to the other opposite side wall. A plurality of light sensors are integrated on the surface of the photoreceptor 22, which can be used to provide feedback on the light emitted by the illumination lamp 21. Therefore, after the protective lens is flipped, the protective lens will block the light emitted by the illumination lamp 21. When contaminants are attached to the protective lens, the light transmittance of the area attached with the contaminants will change, resulting in a change in the intensity of light irradiated to some light sensors of the photoreceptor 22, so that the light sensor sends a signal to achieve the effect of monitoring the contamination of the lens, and sends a signal when the contamination is more serious, prompting the replacement of the protective lens, which can effectively ensure the use of the laser cutting head.

[0039] Since the protective lens will be replaced when the pollution is serious, it is necessary to disassemble the protective lens from the mounting frame 41. Therefore, in order to facilitate the replacement of the protective lens, the protective lens can be connected in the mounting groove 9 by means of snap connection, bolt fastening connection, etc., which can facilitate the later replacement of the protective lens. Figure 3 It can also be found that a driving unit 43 is connected to the vertical section of the L-shaped track groove 8, which can be used to drive the mounting frame 41 to flip the protective lens when detecting the contamination degree of the protective lens, making the detection of the protective lens more convenient.

[0040] The replacement of the protective lens will not only increase the use cost of the laser cutting head, but also cause the laser cutting machine to stop, resulting in a decrease in production capacity and affecting the use of the laser cutting machine.

[0041] Therefore Figure 6 - Figure 8 It can be found that a scraper 42 is rotatably connected to the bottom of the mounting frame 41 in the detection groove 7, and the tip of the scraper 42 is in contact with the bottom of the mounting frame 41, so that when the protective lens is detecting the contamination degree, the mounting frame 41 presses down the scraper 42. At this time, the angle between the plane of the scraper 42 and the forward direction of the mounting frame 41 is large, and the scraper 42 is pressed down. When it is detected that the contamination degree of the protective lens is light and there is no need to replace the protective lens, when the mounting frame 41 is reset, the angle between the plane of the scraper 42 and the forward direction of the mounting frame 41 is small, and the tip of the scraper 42 can scrape off the contaminants on the protective lens, which is used to clean the protective lens, and can effectively extend the service life of the protective lens.

[0042] Since the scraper 42 will flip under the pressure of the mounting frame 41, and the rotation will affect the contact stability between the scraper 42 and the mounting frame 41, a torsion spring is provided at the connection between the scraper 42 and the negative pressure unit 44 to ensure that the scraper 42 is always in stable contact with the mounting frame 41. Since the mounting frame 41 is connected to the L-shaped track groove 8 by two limit rods 10, and the size of the mounting frame 41 cannot be changed, when the driving unit 43 pulls the limit rod 10 downward, under the pull of the mounting frame 41, the other limit rod 10 will slide along the horizontal section of the L-shaped track groove 8, thereby causing the mounting frame 41 to flip over. At this time, the contact portion of the mounting frame 41 with the scraper 42 will not only move downward, but also move slightly laterally, so that the scraper 42 will flip downward under the squeezing of the mounting frame 41 and move downward at the same time. Therefore, a slide groove for the scraper 42 to move downward is opened in the detection groove 7, and a spring for pushing the scraper 42 to return to its original position is arranged in the slide groove, so that the scraper 42 activates the negative pressure unit 44, and releases the negative pressure unit 44 when the scraper 42 is returned to generate a negative pressure to suck away the pollutants.

[0043] As contaminants accumulate on the tip of the scraper 42, the protective lens will be re-adhered to the contaminants during the subsequent inspection process, affecting the use of the scraper 42. Fig. 9 It can be seen that a negative pressure unit 44 is connected to the outer wall of the shell 1, and then an air suction chamber 11 is opened inside the scraper 42, and finally an air inlet groove 12 that penetrates the scraper 42 is opened near the tip of the air suction chamber 11, so that after the scraper 42 scrapes off the pollutants, the negative pressure unit 44 can suck away the pollutants, which can be used to avoid secondary contamination of the protective lens in the subsequent detection process, and further enhance the cleaning effect of the protective lens.

[0044] In a further preferred embodiment of the present invention, Figure 5 As shown, the negative pressure unit 44 includes a negative pressure cover 441, a rubber sleeve 442, a partition 443 and an L-shaped connecting rod 444. The negative pressure cover 441 is fixedly connected to the shell 1. A negative pressure chamber 13 is opened in the negative pressure cover 441. A partition 443 is fixedly connected in the negative pressure chamber 13. A rubber sleeve 442 is slidably connected below the partition 443 in the negative pressure chamber 13. An L-shaped connecting rod 444 is fixedly connected to the top of the rubber sleeve 442. The L-shaped connecting rod 444 passes through the partition 443 and is rotatably connected to the scraper 42. An airway 14 connected to the suction chamber 11 is jointly opened in the middle of the rubber sleeve 442 and the L-shaped connecting rod 444.

[0045] In this embodiment, a negative pressure cover 441 is provided, and a rubber sleeve 442 is slidably connected inside the negative pressure cover 441. The outer wall of the rubber sleeve 442 fits with the inner wall of the negative pressure chamber 13, and the top of the rubber sleeve 442 is connected to the scraper 42 through an L-shaped connecting rod 444. Finally, an air duct 14 connected to the suction chamber 11 is jointly opened in the middle of the rubber sleeve 442 and in the L-shaped connecting rod 444, so that when the scraper 42 is squeezed and moved downward by the mounting frame 41, it can move downward in the negative pressure chamber 13 with the rubber sleeve 442. Then, when the mounting frame 41 is reset, the scraper 42 loses pressure and resets, so that during the reset process, the rubber sleeve 442 stretches the negative pressure chamber 13, thereby generating negative pressure to suck away the pollutants on the scraper 42.

[0046] Since the L-shaped connecting rod 444 is connected to the scraper 42, an escape groove must be provided on the negative pressure cover 441. The setting of the escape groove will affect the air tightness. Figure 5 It can be found that a partition 443 is fixedly connected to the inside of the negative pressure chamber 13, which can isolate the negative pressure chamber 13 into two upper and lower spaces, and can effectively improve the suction force when the negative pressure chamber 13 generates negative pressure, so as to achieve a better cleaning effect.

[0047] In a further preferred embodiment of the present invention, Figure 5 and Fig. 9As shown, the rubber sleeve 442 gradually tilts downward from the inside to the outside, so that a cavity 15 for exhaust is formed between the top of the rubber sleeve 442 and the partition 443, and the negative pressure cover 441 is provided with a one-way valve 16 for exhaust at the cavity 15, and the bottom of the L-shaped connecting rod 444 is provided with a through groove 17 connected to the airway 14 at the cavity 15;

[0048] The tip of the scraper 42 is provided with an elastic portion 18 , and the elastic portion 18 covers the opening of the air inlet groove 12 .

[0049] In this embodiment, the rubber sleeve 442 is gradually tilted downward from the inside to the outside so that a cavity 15 for exhaust is formed between the top of the rubber sleeve 442 and the partition 443. The negative pressure cover 441 is provided with a one-way valve 16 for exhaust at the cavity 15. The bottom of the L-shaped connecting rod 444 is located at the cavity 15 and is provided with a through groove 17 connected to the airway 14. When the rubber sleeve 442 moves downward driven by the scraper 42, the air in the negative pressure cavity 13 is squeezed out. Then the air will enter the cavity 15 along the through groove 17 and be discharged through the one-way valve 16. Then, when the rubber sleeve 442 is reset, the one-way valve 16 is closed to prevent air from entering the cavity 15. At this time, the negative pressure will generate suction at the air inlet groove 12 of the scraper 42, which is used to suck away the pollutants scraped off by the scraper 42, making the cleaning of the scraper 42 more stable.

[0050] Due to the setting of the air inlet groove 12, when the air in the negative pressure chamber 13 is squeezed out, part of the air will be discharged through the air inlet groove 12, so that an airflow that blows the pollutants is generated at the air inlet groove 12, causing the pollutants to be blown away in the detection groove 7, so that the pollutants pass through the protective lens and adhere to the laser generator 6, so that the observation Fig. 9 It can be found that the tip of the scraper 42 is provided with an elastic portion 18, and the elastic portion 18 covers the opening of the air inlet groove 12. At this time, when the tip of the scraper 42 is squeezed, the elastic portion 18 will deform to block the air inlet groove 12, preventing air from being discharged through the air inlet groove 12. Subsequently, when the mounting frame 41 is reset, the pressure applied to the elastic portion 18 will become the pulling force generated by the friction during the reset, so that the elastic portion 18 rebounds to open the air inlet groove 12, thereby ensuring the stability of sucking away pollutants.

[0051] In a further preferred embodiment of the present invention, Figure 4 As shown, the thickness of the protective lens is greater than the thickness of the mounting frame 41 , and the bottom of the mounting frame 41 protrudes downward to form a truncated cone 19 that wraps the lens, and the outer wall of the truncated cone 19 is processed with an inclined surface.

[0052] In the present embodiment, since the protective lens is connected to the mounting frame 41, in order to enable the scraper 42 to effectively clean the protective lens when passing over the mounting frame 41, the thickness of the mounting frame 41 is made smaller than the thickness of the protective lens, so that the protective lens will protrude from the mounting frame 41 after installation, thereby effectively ensuring the cleaning effect of the scraper 42.

[0053] Since the thickness of the protective lens is greater than that of the mounting frame 41, a step surface will be generated between the protective lens and the mounting frame 41. When the tip of the scraper 42 hits the step surface between the protective lens and the mounting frame 41, the reset of the protective lens will be affected. Figure 4 It can be found that the bottom of the mounting frame 41 is convex downward to form a truncated cone 19 for wrapping the lens, and the outer wall of the truncated cone 19 is processed with an inclined surface, which can effectively avoid the generation of a step surface.

[0054] In a further preferred embodiment of the present invention, Figure 4 and Figure 8 As shown, the driving unit 43 includes a driving motor 431, a screw rod 432 and a slider 433. The driving motor 431 is fixedly connected to the bottom of the vertical section of the L-shaped track groove 8, the output end of the driving motor 431 is fixedly connected to the screw rod 432, the outer wall of the screw rod 432 is threadedly connected to the slider 433, and the side wall of the slider 433 is fixedly connected to the limit rod 10.

[0055] In this embodiment, by setting up a drive motor 431 and a screw rod 432, the bottom of the vertical section of the L-shaped track groove 8 is fixedly connected to the drive motor 431, the output end of the drive motor 431 is fixedly connected to the screw rod 432, the outer wall of the screw rod 432 is threadedly connected to a slider 433, and the side wall of the slider 433 is fixedly connected to the limit rod 10, so that the slider 433 can slide quickly in the vertical section of the L-shaped track groove 8, thereby making the flipping efficiency of the protective lens higher and improving the pollution detection efficiency of the protective lens.

[0056] In a further preferred embodiment of the present invention, Figure 1 As shown, the power assembly 3 includes a B-axis motor 31 and a C-axis motor 32 . The C-axis motor 32 is fixedly connected to the robot arm. The output end of the C-axis motor 32 is fixedly connected to the B-axis motor 31 . The output end of the B-axis motor 31 is fixedly connected to the housing 1 .

[0057] In this embodiment, a B-axis motor 31 and a C-axis motor 32 are set, the C-axis motor 32 is fixedly connected to the robot arm, the output end of the C-axis motor 32 is fixedly connected to the B-axis motor 31, and the output end of the B-axis motor 31 is fixedly connected to the shell 1, so that the C-axis motor 32 can drive the B-axis motor 31 to rotate along the Z-axis, and the B-axis motor 31 can drive the shell 1 to swing back and forth, so that the laser cutting head can adjust the angle in multiple dimensions when in use, effectively improving the processing range of the laser cutting head.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-dimensional laser cutting head with built-in lens contamination monitoring, characterized in that: It comprises a housing (1), a bottom of which is provided with a laser channel (5) vertically extending upward, a laser generator (6) being fixedly connected to the top of the laser channel (5), a detection groove (7) being provided in the laser channel (5) below the laser generator (6), and a pair of opposite side walls of the detection groove (7) being provided with an L-shaped track groove (8); A pollution monitoring unit (2), comprising an illumination lamp (21) and a photoreceptor (22), wherein the illumination lamp (21) and the photoreceptor (22) are respectively arranged on two sides of the L-shaped track groove (8) and are respectively fixedly connected to the side walls of the detection groove (7); A power assembly (3), the output end of which is connected to the top of the laser generator (6), and the fixed end of which is fixedly connected to the mechanical arm; The cleaning mechanism (4) comprises a mounting frame (41), a scraper (42), a driving unit (43) and a negative pressure unit (44); a mounting groove (9) for mounting a protective lens is provided in the middle of the mounting frame (41); both sides of the outer wall of the mounting frame (41) are rotatably connected to limit rods (10); the two ends of the limit rods (10) are respectively slidably connected to two L-shaped track grooves (8); the driving unit (43) is arranged in a vertical section of the L-shaped track groove (8) and is connected to one of the two L-shaped track grooves (8). The detection groove (7) is connected to a limit rod (10), the inner wall of the detection groove (7) is located below the installation frame (41) and is rotatably connected to a scraper (42), the tip of the scraper (42) is in contact with the installation frame (41), an air suction cavity (11) is hollowly arranged in the scraper (42), and an air inlet groove (12) penetrating the scraper (42) is opened near the tip of the air suction cavity (11), and the outer wall of the housing (1) is connected to a negative pressure unit (44), and the negative pressure unit (44) is in communication with the air inlet groove (12).

2. A three-dimensional laser cutting head with built-in lens contamination monitoring according to claim 1, characterized in that: The negative pressure unit (44) comprises a negative pressure cover (441), a rubber sleeve (442), a partition (443) and an L-shaped connecting rod (444); the negative pressure cover (441) is fixedly connected to the shell (1); a negative pressure chamber (13) is provided in the negative pressure cover (441); the partition (443) is fixedly connected in the negative pressure chamber (13); a rubber sleeve (442) is slidably connected below the partition (443) in the negative pressure chamber (13); an L-shaped connecting rod (444) is fixedly connected to the top of the rubber sleeve (442); the L-shaped connecting rod (444) passes through the partition (443) and is rotatably connected to the scraper (42); an airway (14) communicating with the suction chamber (11) is provided in the middle of the rubber sleeve (442) and in the L-shaped connecting rod (444).

3. The three-dimensional laser cutting head with built-in lens contamination monitoring according to claim 2, characterized in that: The rubber sleeve (442) is gradually inclined downward from the inside to the outside, so that a cavity (15) for exhaust is formed between the top of the rubber sleeve (442) and the partition (443); the negative pressure cover (441) is provided with a one-way valve (16) for exhaust at the cavity (15); and the bottom of the L-shaped connecting rod (444) is provided with a through groove (17) in communication with the airway (14) at the cavity (15).

4. The three-dimensional laser cutting head with built-in lens contamination monitoring according to claim 3, characterized in that: The tip of the scraper (42) is provided with an elastic portion (18), and the elastic portion (18) covers the opening of the air inlet groove (12).

5. The three-dimensional laser cutting head with built-in lens contamination monitoring according to claim 4, characterized in that: The thickness of the protective lens is greater than the thickness of the mounting frame (41); the bottom of the mounting frame (41) protrudes downward to form a truncated table (19) that wraps the lens; the outer wall of the truncated table (19) is processed with an inclined surface.

6. The three-dimensional laser cutting head with built-in lens contamination monitoring according to claim 1, characterized in that: The drive unit (43) comprises a drive motor (431), a screw rod (432) and a slider (433); the drive motor (431) is fixedly connected to the bottom of the vertical section of the L-shaped track groove (8); the screw rod (432) is fixedly connected to the output end of the drive motor (431); the slider (433) is threadedly connected to the outer wall of the screw rod (432); and the side wall of the slider (433) is fixedly connected to the limit rod (10).

7. The three-dimensional laser cutting head with built-in lens contamination monitoring according to claim 1, characterized in that: The power assembly (3) comprises a B-axis motor (31) and a C-axis motor (32); the C-axis motor (32) is fixedly connected to the robot arm; the output end of the C-axis motor (32) is fixedly connected to the B-axis motor (31); and the output end of the B-axis motor (31) is fixedly connected to the housing (1).

Images