CN118371859A - 3D flying laser beam machining device - Google Patents

Abstract

The application relates to the field of welding, in particular to a 3D flying laser beam machining device, which comprises a manipulator and a control cabinet, wherein a vibrating mirror scanning structure for adjusting laser beams is arranged at the free end of the manipulator, the vibrating mirror scanning structure comprises a mounting seat, an optical fiber adapter arranged on the mounting seat, a first reflecting lens arranged on the mounting seat, and a first adjusting mechanism arranged between the optical fiber adapter and the first reflecting lens and used for adjusting the axial position of the beams on the Z axis of a product machining surface, a field lens is arranged on one side of the mounting seat facing the control cabinet, a second adjusting mechanism for controlling the axial position of the beams on the X axis and the Y axis of the product machining surface is also arranged in the mounting seat, and the beams generated by a laser generator sequentially pass through the first adjusting mechanism, the first reflecting lens and the second adjusting mechanism after entering an inner cavity of the mounting seat through the optical fiber adapter. Through the scheme, the automatic welding machine is high in automation degree and machining efficiency, and additional product welding machining can be achieved.

Description

3D flying laser beam machining device

Technical Field

The application relates to the technical field of laser welding, in particular to a 3D flying laser beam machining device.

Background

The traditional welding is usually carried out by adopting a welding rod under high pressure, so that the melting welding between objects is realized, the welding mode considers that the factors are larger, the processing quality is uneven, and the welding quality of the existing product is difficult to guarantee. With the development of technology and the precision of processing parts, laser welding becomes the mainstream trend of the existing welding.

Laser welding is known as a highly efficient and precise welding method using a laser beam with a high energy density as a heat source. The welding process is heat conduction type, that is, the surface of the workpiece is heated by laser radiation, the surface heat is diffused to the inside by heat conduction, and the workpiece is melted by controlling the parameters of the width, the energy, the peak power, the repetition frequency and the like of the laser pulse, so that a specific molten pool is formed.

The existing traditional laser is used for welding an object plane, and is usually fixed on a sliding block capable of realizing XY axial movement, and laser welding is carried out on different parts of the object surface along with driving the sliding block to move. It is difficult to process some rugged curved three-dimensional objects, such as those produced by conventional laser processing.

Disclosure of Invention

In order to solve the problem that the traditional laser is difficult to process complex workpieces, the application provides a 3D flying laser beam processing device.

The application provides a 3D flying laser beam processing device which adopts the following technical scheme:

The utility model provides a 3D flight laser beam processingequipment, includes the manipulator, sets up the switch board in manipulator one side, the free end of manipulator is provided with the mirror scanning structure that shakes that is used for adjusting laser beam, mirror scanning structure shakes including the mount pad, set up the optic fibre adapter on the mount pad, set up first reflector on the mount pad, set up the first adjustment mechanism that is used for adjusting the light beam at product processing surface Z axle axial position between optic fibre adapter and first reflector, the mount pad is provided with the field lens towards switch board one side, still be provided with the second adjustment mechanism of control light beam at product processing surface X axle axial, Y axle axial position in the mount pad, the light beam that laser generator produced gets into behind the mount pad inner chamber through first adjustment mechanism, first reflector, second adjustment mechanism in proper order through the field lens direct the product processing face after the adjustment light beam is final.

Through adopting above-mentioned technical scheme, at first the manipulator adopts the industrial robot that can realize six degrees of freedom robotic arms, and the laser beam that external laser ware arouses gets into the inner chamber light path system of mount pad through the optic fibre adapter in, and vertically decurrent light beam is through being the reflection of first speculum of slope, gets into second regulation structure and adjusts the reflection to the surface of waiting to process the object again, and first regulation mechanism is through changing the divergence of light beam to realize changing the light beam focus in the axial position of Z axle. Through second adjustment mechanism for the light beam after changing focus position can realize X axle and the axial regulation of Y axle on the surface of product, and in the whole course of working, through industry camera vision capture positioning weld position, the cooperation manipulator is freely regulated and control, thereby makes dynamic adjustment welding, is convenient for realize carrying out welding process to responsible for work piece surface.

Optionally, first adjustment mechanism includes the slide rail of fixing at the mount pad inner wall, vertically slides the slider on the slide rail, fixes at the first motor of mount pad inner wall, fixes at first motor pivot first pole, fixes the second pole on the slider, sets up the variable collimating lens between optic fibre adapter and first reflector plate, articulated between second pole and the first pole, variable collimating lens is fixed on the lateral wall of slider, first motor and switch board control connection.

Through adopting above-mentioned technical scheme, through the operation of switch board control first motor, under the effect of first pole and second pole for the vertical slip of length direction along the slide rail of second pole pulling slider, thereby variable collimation lens is along optical axis dynamic drive, changes the divergence of laser beam, thereby changes the position of light spot along the Z axle, cooperates automated control system can realize laser beam's automatic zoom.

Optionally, the second adjustment mechanism includes the second motor of fixing in the mount pad inner chamber, fixes at the epaxial second reflector plate of second motor pivot, fixes at the epaxial third motor of mount pad inner chamber, fixes at the epaxial third reflector plate of third motor, the axial of second motor is perpendicular setting with the axial of third motor.

Through adopting above-mentioned technical scheme, through the operation of control second motor and third motor respectively for second reflection lens and third reflection lens rotate, and the combination of different rotation angles makes the laser beam carry out the removal welding at the surface of product, also is convenient for the staff simultaneously to the regulation and control of laser beam.

Optionally, the outside of mount pad still is provided with first industry camera, be provided with fourth reflection lens and fifth reflection lens in the inner chamber of mount pad, fourth reflection lens is parallel arrangement with fifth reflection lens, and fifth reflection lens is parallel arrangement with first reflection lens, variable collimation lens is located between fourth reflection lens and the fifth reflection lens.

By adopting the technical scheme, the first industrial camera is mainly used for observing the state of the welding seam at the welding position in the welding process, so that the normal operation of the welding equipment is ensured. By arranging the fourth reflecting mirror and the fifth reflecting mirror, the welding seam part can be observed at the part far away from the field lens.

Optionally, the lower extreme of mount pad still is fixed with the connecting plate, install the second industry camera on the connecting plate, it is provided with the shielding piece that is used for protecting the field lens to rotate on the lateral wall of connecting plate, still be provided with the actuating mechanism who is used for controlling the shielding piece rotation on the connecting plate.

Through adopting above-mentioned technical scheme, the rotation of shielding piece is controlled through actuating mechanism for under unwelded state, shielding piece shelters from before the camera lens of field lens, thereby guarantee camera lens is difficult to be attached by dust and impurity in the air, when needs work, shielding piece rotation is opened.

Optionally, the actuating mechanism includes the revolving cylinder of fixing on the connecting plate, the coaxial connecting block of fixing on revolving cylinder pivot, the connecting block eccentric fixing is on the lateral wall of shielding piece.

Through adopting above-mentioned technical scheme, the gas circuit of switch board control revolving cylinder switches on to make revolving cylinder's pivot rotate, and drive connecting block synchronous rotation, thereby rotatory back of shielding piece that links to each other with the connecting block makes the camera lens of field lens be open state, the laser welding of being convenient for.

Optionally, the outside clamp of field lens holds the link, be provided with the air knife on the link, the open length direction of air knife is perpendicular with the axial of field lens and sets up, the outside of air knife is provided with the air duct that is linked together with external air supply, be provided with the solenoid valve on the air duct, still be provided with on the connecting plate and be used for controlling solenoid valve moving control assembly.

Through adopting above-mentioned technical scheme, after the control assembly control solenoid valve operation, the air knife is through blowing out the air current from rectangular form opening to form and be horizontal air wall, the laser beam reaches the product welding position after penetrating from the scene, and air wall separation is in the camera lens department of scene, thereby makes flue gas and the dust that the welding produced be difficult to adhere to on the camera lens of scene, ensures the cleanliness factor of scene camera lens, thereby reduces the energy loss problem of laser.

Optionally, the control assembly includes the stopper of fixing in revolving cylinder orientation shielding piece one side, sets up the recess on the stopper, installs the touch switch in the recess, the touch switch is connected with the solenoid valve electricity, the contact of touch switch stretches out outside the recess, works as after the connecting block rotates the conflict stopper for the connecting block supports the contact head in order to control the solenoid valve operation.

Through adopting above-mentioned technical scheme, when the axle of control revolving cylinder rotates for the connecting block rotates in step, and the stopper is spacing the rotation of connecting block, in order to indicate that the shielding piece has rotated in place, and the connecting block contradicts the contact this moment, makes the solenoid valve obtain pulse current and is open state, thereby makes the gas circuit of air knife switch on mutually.

Optionally, a laser range finder is further arranged on the side wall of the connecting plate.

By adopting the technical scheme, the laser range finder realizes accurate distance measurement on the target by utilizing various parameters of the debugging laser. The laser range finder has light weight, small volume, simple operation, high speed and accuracy, and the error is only one fifth to one hundred times of that of other optical range finders, so that the positioning of the Z-axis direction of the workpiece can be effectively realized, and the accurate processing is realized.

Optionally, a plurality of wind holes have evenly been seted up to the edge interval of shielding piece, the inner chamber of shielding piece is formed with the wind chamber, the wind chamber passes through the pipe connection on the export of solenoid valve, the air outlet of air knife is located shielding piece and deviates from field lens one side.

The air outlet of the air knife is arranged on the lower side of the shielding piece, so that the air outlet is difficult to face the edge of the shielding piece, and the air wall effect is better. Meanwhile, the shielding piece is the part closest to the field lens, and the plurality of air holes are formed, so that an air wall is formed at the part close to the field lens, the field lens is protected in multiple layers, and dust and smoke dust are reduced to be attached to the surface of the field lens.

In summary, the present application includes at least one of the following beneficial technical effects:

1. Machining complex three-dimensional objects, modeling in advance through visual scanning, so that needed coordinate positioning is formed, and a microcomputer program controls a manipulator and a first motor, a second motor and a third motor to operate, so that rapid machining and welding of complex products are realized;

2. In the welding process, the field lens is difficult to be attached by welding smoke and external sundries.

Drawings

Fig. 1 is a schematic view of the overall structure of the present application.

Fig. 2 is a schematic view of the internal structure of the mounting base in the present application.

Fig. 3 is a schematic view of a part of a structure of a mounting base of the present application, mainly used for showing a second adjusting mechanism.

Fig. 4 is a schematic view of a driving mechanism in the present application.

Fig. 5 is a schematic structural view of a shielding sheet portion of the present application, mainly used for showing a control assembly.

Fig. 6 is a schematic view of the structure of the present application at the location of the knife.

Reference numerals: 1. a manipulator; 2. a control cabinet; 3. a galvanometer scanning structure; 4. a mounting base; 5. a fiber optic adapter; 6. a first reflecting mirror; 7. a first adjustment mechanism; 8. a field lens; 9. a second adjustment mechanism; 10. a slide rail; 11. a slide block; 12. a first motor; 13. a first lever; 14. a second lever; 15. a variable collimation lens; 16. a second motor; 17. a second reflecting mirror; 18. a third motor; 19. a third reflective lens; 20. a first industrial camera; 21. a fourth reflecting mirror; 22. a fifth reflecting mirror; 23. a connecting plate; 24. a second industrial camera; 25. a shielding sheet; 26. a driving mechanism; 27. a rotary cylinder; 28. a connecting block; 29. a connecting frame; 30. an air knife; 31. an air duct; 32. an electromagnetic valve; 33. a control assembly; 34. a limiting block; 35. a groove; 36. a touch switch; 37. a laser range finder; 38. a wind hole; 39. a wind chamber; 40. a first light beam; 41. a second light beam; 42. a third light beam; 43. the beam is simulated.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are shown in fig. 1-6.

In the description of the present specification, reference to the terms "certain embodiments," "one embodiment," "some embodiments," "an exemplary embodiment," "an example," "a particular example," or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The embodiment of the application discloses a 3D flying laser beam machining device.

Referring to fig. 1, a 3D flying laser beam machining apparatus includes a robot arm 1 and a control cabinet 2, and a galvanometer scanning structure 3 is provided at a free end of the robot arm 1. The manipulator 1 is an industrial robot with six degrees of freedom, and the manipulator 1 is composed of a base and a manipulator. In the actual use process, the manipulator 1 is installed on one side of the control cabinet 2, the upper surface of the control cabinet 2 is used as a processing platform of parts, the vibrating mirror scanning structure 3 is arranged at the free end of the manipulator 1 facing the control cabinet 2, and the free end of the manipulator 1 can be controlled to move up and down, front and back and left and right through the control cabinet 2, so that the adjustable range of laser welding is further improved.

Referring to fig. 1 and 2, the galvanometer scanning structure 3 includes a mount 4 fixed to a free end of the manipulator 1, an optical fiber adapter 5, a first reflecting mirror 6, a first adjusting mechanism 7, and a second adjusting mechanism 9. In the process of processing, the energy intensity of the laser beams required in the welding process of the parts made of different materials is different, so in the implementation, by arranging the optical fiber adapter 5, a proper laser exciter is selected first, the focused light beam is connected to the optical fiber adapter 5 through an optical fiber, when the light signal enters the interior of the adapter from the optical fiber connector, the light signal is converted into the light signal suitable for being received by another optical fiber receiver through the processing of an optical lens, and then the light signal is output from the other optical fiber connector. In this process, the optical fiber adapter 5 performs attenuation, amplification, filtering, etc. on the optical signal to ensure the quality and stability of the transmission of the optical signal.

Referring to fig. 2 and 3, the first reflecting mirror plate 6 is inclined at one hundred forty-five degrees, and the inclined surface of the first reflecting mirror plate 6 faces the second adjusting mechanism 9. The first adjustment mechanism 7 is arranged between the optical fiber adapter 5 and the first reflection lens 6, the first adjustment mechanism 7 comprises a sliding rail 10, a sliding block 11, a first motor 12, a first rod 13, a second rod 14 and a variable collimation lens 15, the sliding rail 10 is vertically arranged, the sliding block 11 vertically slides on the sliding rail 10, the first motor 12 is fixed on the side wall of the inner cavity of the mounting seat 4, the first rod 13 is vertically arranged on the rotating shaft of the first motor 12, one end of the first rod 13 is fixedly connected with the rotating shaft of the first motor 12, and the other end of the first rod 13 is hinged with the second rod 14. The end of the second rod 14 remote from the first rod 13 is rotatably connected to the side wall of the slider 11, and the variable collimating lens 15 is fixed to the side wall of the slider 11.

Referring to fig. 2, in the present embodiment, when the laser beam passes through the optical fiber adapter 5 to form a first beam 40, the first beam is reflected by the first reflecting mirror 6 to form a second beam 41 perpendicular to the first beam 40, the second beam 41 is adjusted by the second adjusting mechanism 9 to form a third beam 42 perpendicular to the second beam 41, and finally the third beam 42 is directed at the product to be welded.

Referring to fig. 2 and 3, a variable collimating lens 15 is disposed between the fiber adapter 5 and the first reflecting lens 6, and the resulting first light beam 40 is adjusted by the variable collimating lens 15 to ultimately adjust the focal power of the third light beam 42 to the surface of the product. The variable collimating lens 15 is dynamically driven along the first beam 40 to change the divergence of the laser beam, thereby changing the position of the spot along the Z axis, and the automatic zooming of the laser beam can be realized in cooperation with an automated control system.

Referring to fig. 2 and 3, in order to further improve the adjustable range of the laser beam, so as to facilitate the laser welding processing of more scenes, the second adjusting mechanism 9 includes a second motor 16, a second reflecting mirror 17, a third motor 18 and a third reflecting mirror 19, wherein the second reflecting mirror 17 is vertically arranged, the second motor 16 is fixed in the inner cavity of the mounting seat 4, and the rotating shaft of the second motor 16 is fixedly connected with the second reflecting mirror 17 which is vertically arranged. The third reflection lens 19 is horizontally arranged horizontally, the third reflection lens 19 is fixedly connected with the rotating shaft of the third motor 18, the third reflection lens 19 is positioned on one side of the second reflection lens 17, and the rotating shaft of the second motor 16 is vertically arranged with the rotating shaft of the third motor 18.

Referring to fig. 2 and 3, when the second light beam 41 is incident on the second reflecting mirror 17, the second reflecting mirror 17 is controlled to rotate by the second motor 16, so as to realize adjustment of the axial position of the light beam on the product surface X, and the length of the adjustable range is the width of the second reflecting mirror 17. The light beam reflected by the second reflecting mirror plate 17 irradiates the position of the third reflecting mirror plate 19, so that the laser beam realizes the regulation and control of the direction perpendicular to the axial direction of the third motor 18, that is, the regulation and control of the Y-axis axial direction by controlling the rotation of the rotating shaft of the third motor 18.

Referring to fig. 2, in order to observe the welding condition of the weld joint portion in real time during the welding process, a first industrial camera 20 is further provided in the present application, and the first industrial camera 20 is fixedly installed on the sidewall of the installation base 4. The application reserves a camera visual interface and can be used for butting CCD industrial cameras of different models.

Referring to fig. 2 and 3, in order to realize clear observation of the weld joint, a fourth mirror plate 21 and a fifth mirror plate 22 are disposed in the inner cavity of the mounting seat 4, the fourth mirror plate 21 is disposed parallel to the first mirror plate 6, and the fourth mirror plate 21 is located above the variable collimating mirror plate 15. The analog light beam 43 formed by the first industrial camera 20 is reflected by the fourth reflection mirror 21 and then is parallel to the first light beam 40. The fifth reflecting mirror 22 is disposed near the first reflecting mirror 6, and the fifth reflecting mirror 22 is disposed parallel to the first reflecting mirror 6. After the analog light beam 43 is incident to the fifth reflecting mirror 22, the analog light beam 43 turns ninety degrees to overlap with the second light beam 41 and is reflected by the second reflecting mirror 17 and the third reflecting mirror 19 to directly irradiate the welding part of the product, and finally, the state of the welding part is observed by the first industrial camera 20 by combining the principle that the mirrors filter different wavelengths.

Referring to fig. 3 and 4, a connection plate 23 is fixed to a lower end of the mount 4, and a second industrial camera 24 and a laser range finder 37 are mounted on the connection plate 23. The laser rangefinder 37 utilizes various parameters of the modulated laser to achieve accurate distance measurement of the target. The laser range finder 37 has light weight, small volume, simple operation, high speed and accuracy, and the error is only one fifth to one hundred times of that of other optical range finders, so that the positioning of the workpiece in the Z-axis direction can be effectively realized, and the accurate processing can be realized. The second industrial camera 24 is mainly used for observing the condition of the whole processing station. The second industrial camera 24 has a self-scanning function and powerful video image recording software, so that the production efficiency and the product quality are improved, and meanwhile, due to the small size, light weight, no influence of a magnetic field and vibration and collision resistance, the position shape and defects of a product can be stably photographed and monitored, and the precision and quality of product processing are further improved.

Referring to fig. 2 and 3, a field lens 8 is mounted on the mounting base 4, and the light beam reflected by the third reflection lens 19 changes the transmission path of the light through the field lens 8 to change the size and quality of an image field, so that the capability of the edge beam incident on the detector is improved, and the non-uniform light surface on the photosensitive surface of the detector is homogenized.

Referring to fig. 2, 4 and 5, a shielding plate 25 for protecting the lens of the field lens 8 is rotatably provided on a side wall of the connection plate 23, and a driving mechanism 26 for controlling the rotation of the shielding plate 25 is provided on a side wall of the connection plate. The driving mechanism 26 includes a rotary cylinder 27 and a connection block 28, the rotary cylinder 27 is fixedly mounted on a side wall of the connection plate 23, and the connection block 28 is coaxially fixed on a rotation shaft of the rotary cylinder 27. The connection block 28 is eccentrically fixed to the side wall of the shielding plate 25, so that the shielding plate 25 is shielded at the lower side of the field lens 8 after being rotated by controlling the rotation of the rotation shaft of the rotation cylinder 27, and thus when unprocessed, external dust is difficult to adhere to the lens of the field lens 8.

Referring to fig. 2 and 6, during the laser welding process, due to the high energy heating of the surface of the workpiece by the laser beam, gas thermal expansion is generated during the welding process, so that gas flow is formed, and smoke generated during the processing is easily attached to the lens of the field lens 8, thereby affecting the welding quality. For this purpose, a connecting frame 29 is held on the outside of the field lens 8 in order to secure the field lens 8 in the processed state, and an air knife 30 is provided on the connecting frame 29.

Referring to fig. 2, 4, 5 and 6, the opening length direction of the air knife 30 is perpendicular to the axial direction of the field lens 8, an air duct 31 communicating with an external air source is arranged on the outer side of the air knife 30, an electromagnetic valve 32 is arranged on the air duct 31, and a control assembly 33 for controlling the operation of the electromagnetic valve 32 is further arranged on the connecting plate 23. In the processing process, the electromagnetic valve 32 is controlled, so that high-pressure and high-speed air flow is introduced into the air knife 30, and a horizontal air wall is formed on the lower side of the field lens 8, so that welding smoke and external impurities are difficult to adhere to the lens of the field lens 8.

Referring to fig. 2, 5 and 6, in order to further enhance the protection of the field lens 8 in the present embodiment, the number of air knives 30 is two along the vertical direction, and the two air knives 30 are juxtaposed to form two air walls disposed up and down. In the actual installation and the processing process, because the air flow blown out by the air knife 30 is high-speed high-pressure air flow, in order to reduce interference to the air wall, the air wall is positioned at the lower side of the shielding piece 25, thereby avoiding the edge of the shielding piece 25 from obstructing the circulation of the air flow of the air wall and reducing the generation of reverse air flow.

Referring to fig. 2, 5 and 6, as can be seen from the above description, a gap with a thickness of a shielding plate 25 is reserved between the air wall near the near-field lens 8 and the lens of the field lens 8, so that the field lens 8 is difficult to be subjected to welding smoke and impurities in a processing state. A plurality of wind holes 38 are uniformly formed in the edge of the shielding sheet 25 at intervals, a wind cavity 39 is formed in the inner cavity of the shielding sheet 25, the wind cavity 39 is communicated with the outlet of the electromagnetic valve 32 through a pipeline, and a third wind wall is formed at the edge of the shielding sheet 25 in the process of ventilating the wind cavity 39, so that the field lens 8 is further ensured to be difficult to damage.

Referring to fig. 5 and 6, it is known that the operation of the air knife 30 plays a critical role in protecting the field lens 8 in the working state, and therefore judging the circulation of the air flow after the shutter 25 is opened plays a critical role in the laser welding setting. In the application, the air passage of the rotary air cylinder 27 and the air passage of the electromagnetic valve 32 are the same, and the air knife is in an operating state after the shielding sheet 25 rotates open. For this purpose, the control assembly 33 in the present application comprises a limiting block 34 and a touch switch 36, wherein a groove 35 is formed on the side wall of the limiting block 34, the touch switch 36 is a mechanical switch with an automatic reset contact, and the touch switch 36 is installed in the groove 35 and electrically connected with the electromagnetic valve 32. The limiting block 34 realizes the positioning of the rotating angle of the rotating cylinder 27, and when the shielding sheet 25 rotates, the connecting block 28 contacts the contact of the touch switch 36, so that the electromagnetic valve 32 is controlled to be conducted, and the air knife runs at the moment.

While embodiments of the present application have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the application, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the application.

Claims (10)

1. A 3D flying laser beam machining device, characterized in that: including manipulator (1), setting switch board (2) in manipulator (1) one side, the free end of manipulator (1) is provided with shakes mirror scanning structure (3) that are used for adjusting laser beam, shakes mirror scanning structure (3) including mount pad (4), fiber adapter (5) that set up on mount pad (4), set up first reflector (6) on mount pad (4), set up first adjustment mechanism (7) that are used for adjusting the light beam at product processing surface Z axle axial position between fiber adapter (5) and first reflector (6), mount pad (4) are provided with field mirror (8) towards switch board (2) one side, still be provided with second adjustment mechanism (9) of control light beam at product processing surface X axle, Y axle axial position in mount pad (4), the light beam that laser generator produced is through first adjustment mechanism (7), first reflector (6), second adjustment mechanism (9) after fiber adapter (5) get into the inner chamber of mount pad (4) in proper order, light beam after the adjustment is through the direct image (8) processing surface product after the direct image.

2. A 3D flying laser beam machining device according to claim 1, wherein: the first adjusting mechanism (7) comprises a sliding rail (10) fixed on the inner wall of the mounting seat (4), a sliding block (11) vertically sliding on the sliding rail (10), a first motor (12) fixed on the inner wall of the mounting seat (4), a first rod (13) fixed on the rotating shaft of the first motor (12), a second rod (14) fixed on the sliding block (11), and a variable collimating lens (15) arranged between the optical fiber adapter (5) and the first reflecting lens (6), wherein the second rod (14) is hinged with the first rod (13), the variable collimating lens (15) is fixed on the side wall of the sliding block (11), and the first motor (12) is in control connection with the control cabinet (2).

3. A 3D flying laser beam machining device according to claim 2, wherein: the second adjusting mechanism (9) comprises a second motor (16) fixed in the inner cavity of the mounting seat (4), a second reflecting lens (17) fixed on the rotating shaft of the second motor (16), a third motor (18) fixed in the inner cavity of the mounting seat (4) and a third reflecting lens (19) fixed on the rotating shaft of the third motor (18), and the axial direction of the second motor (16) and the axial direction of the third motor (18) are perpendicular.

4. A 3D flying laser beam machining device according to claim 2, wherein: the outer side of mount pad (4) still is provided with first industry camera (20), be provided with fourth reflection lens (21) and fifth reflection lens (22) in the inner chamber of mount pad (4), fourth reflection lens (21) are parallel arrangement with fifth reflection lens (22), and fifth reflection lens (22) are parallel arrangement with first reflection lens (6), variable collimation lens (15) are located between fourth reflection lens (21) and fifth reflection lens (22).

5. A 3D flying laser beam machining device according to claim 1, wherein: the camera is characterized in that a connecting plate (23) is further fixed at the lower end of the mounting seat (4), a second industrial camera (24) is mounted on the connecting plate (23), a shielding plate (25) for protecting a lens of the field lens (8) is rotatably arranged on the side wall of the connecting plate (23), and a driving mechanism (26) for controlling the shielding plate (25) to rotate is further arranged on the connecting plate (23).

6. A 3D flying laser beam machining device according to claim 5, wherein: the driving mechanism (26) comprises a rotary air cylinder (27) fixed on the connecting plate (23) and a connecting block (28) coaxially fixed on the rotating shaft of the rotary air cylinder (27), and the connecting block (28) is eccentrically fixed on the side wall of the shielding sheet (25).

7. A 3D flying laser beam machining device according to claim 6, wherein: the field lens is characterized in that a connecting frame (29) is clamped on the outer side of the field lens (8), an air knife (30) is arranged on the connecting frame (29), the opening length direction of the air knife (30) is perpendicular to the axial direction of the field lens (8), an air duct (31) communicated with an external air source is arranged on the outer side of the air knife (30), an electromagnetic valve (32) is arranged on the air duct (31), and a control assembly (33) for controlling the electromagnetic valve (32) to operate is further arranged on the connecting plate (23).

8. A 3D flying laser beam machining device according to claim 7, wherein: the control assembly (33) comprises a limiting block (34) fixed on one side of the rotary cylinder (27) towards the shielding piece (25), a groove (35) formed in the limiting block (34) and a touch switch (36) arranged in the groove (35), wherein the touch switch (36) is electrically connected with the electromagnetic valve (32), and a contact of the touch switch (36) extends out of the groove (35), so that after the connecting block (28) rotates to abut against the limiting block (34), the connecting block (28) abuts against the contact to control the operation of the electromagnetic valve (32).

9. A 3D flying laser beam machining device according to claim 5, wherein: the side wall of the connecting plate (23) is also provided with a laser range finder (37).

10. A 3D flying laser beam machining device according to claim 7, wherein: a plurality of air holes (38) are uniformly formed in the edge of the shielding sheet (25) at intervals, an air cavity (39) is formed in the inner cavity of the shielding sheet (25), the air cavity (39) is connected to the outlet of the electromagnetic valve (32) through a pipeline, and the air outlet of the air knife (30) is located on one side of the shielding sheet (25) away from the field lens (8).