CN212311151U - Laser processing head for cutting - Google Patents

Abstract

The utility model discloses a laser beam machining head for cutting belongs to laser beam machining technical field. A laser beam machining head for cutting includes by optical fiber connecting device, collimating mirror device, light beam adjusting device, focusing mirror device and the cutting nozzle device that one end set gradually to the other end, and light beam adjusting device includes at least one wedge lens and first actuating mechanism, the wedge lens set up in between collimating mirror device and the focusing mirror device, every the wedge lens is connected with one first actuating mechanism, first actuating mechanism is used for driving the wedge lens wind the central axis of wedge lens is rotatory. The utility model provides high laser beam machining head's life has realized the meticulous cutting.

Description

Laser processing head for cutting

Technical Field

The utility model relates to a laser beam machining technical field especially relates to a laser beam machining head for cutting.

Background

Along with the continuous expansion of laser application, laser is widely used in the cutting field, the laser beam of the existing laser cutting device is still, and the single light spot cutting cannot meet the requirements of various processing technologies, such as inconvenient realization of fine cutting and the like.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a laser beam machining head for cutting can make the laser beam motion, improves the life of processing head, realizes meticulous cutting.

To achieve the purpose, the utility model adopts the following technical proposal:

a laser processing head for cutting comprises an optical fiber connecting device, a collimating lens device, a focusing lens device and a cutting nozzle device which are sequentially arranged from one end to the other end, and further comprises a light beam adjusting device, wherein the light beam adjusting device comprises at least one wedge-shaped lens and a first driving mechanism, the wedge-shaped lens is arranged between the collimating lens device and the focusing lens device, each wedge-shaped lens is connected with one first driving mechanism, and the first driving mechanism is used for driving the wedge-shaped lens to rotate around the central axis of the wedge-shaped lens;

the cutting nozzle device comprises a nozzle and a wire feeding mechanism, the nozzle is connected with the focusing mirror device, and the wire feeding mechanism is arranged on one side of the nozzle.

Optionally, there are two wedge-shaped lenses, the two wedge-shaped lenses are arranged in parallel at intervals, and each wedge-shaped lens is connected with one first driving mechanism.

Optionally, the light beam adjusting apparatus further comprises:

the first connecting seat is connected to the collimating lens device, one wedge-shaped lens is rotatably connected in the first connecting seat, and the wedge-shaped lens is hermetically connected with the inner wall of the first connecting seat;

one end of the second connecting seat is connected to the first connecting seat, the second connecting seat is arranged opposite to the first connecting seat, a cavity is formed between the first connecting seat and the second connecting seat, one wedge-shaped lens is rotatably connected in the second connecting seat, the wedge-shaped lens is hermetically connected with the second connecting seat, and light beams can sequentially penetrate through the two wedge-shaped lenses; and

and the dustproof mechanism is arranged in the cavity and positioned between the two wedge-shaped lenses and is used for blocking dust from entering between the two wedge-shaped lenses.

Optionally, the light beam adjusting apparatus further comprises:

the two first lens cones are arranged in the cavity, one end of one first lens cone is rotatably connected to the first connecting seat, one end of the other first lens cone is rotatably connected to the second connecting seat, and the two first lens cones are respectively provided with one wedge-shaped lens.

Optionally, the dust-proof mechanism comprises:

a first retainer ring connected to one of the two first barrels; and

the second retaining ring is connected to the other of the two first lens barrels;

one of the end face of the first retainer ring facing the second retainer ring and the end face of the second retainer ring facing the first retainer ring is provided with an annular protrusion, the other end of the first retainer ring is provided with an annular groove, the annular protrusion is arranged in the annular groove, and a gap is reserved between the annular protrusion and the annular groove.

Optionally, the focusing mirror device comprises:

a focus mount having a hollow cavity;

the focusing mirror base is arranged in the focusing mounting base;

the second lens cone is arranged in the focusing lens base;

the focusing lens is arranged in the second lens barrel; and

the second driving mechanism can drive the focusing lens base to move along the direction of the central axis of the focusing lens so as to drive the focusing lens to move.

Optionally, the second drive mechanism comprises:

the guide rail is arranged on the inner wall of the focusing installation seat, and the focusing lens seat is connected with the guide rail in a sliding manner;

a mounting hole is formed in one side of the focusing mounting seat corresponding to the position of the focusing mirror seat, and the first dustproof cover is arranged on one side of the focusing mounting seat and used for plugging the mounting hole; and

the ball screw is arranged in the first dustproof cover, the focusing lens base is connected to the output end of the ball screw, and the ball screw can drive the focusing lens base to move along the direction of the central axis of the focusing lens.

Optionally, the second actuating mechanism further comprises a scale, the scale is connected to the output end of the ball screw, one side of the first dust cover is provided with a window, and the window is configured to observe the scale of the scale.

Optionally, the cutting nozzle device comprises:

one end of the connecting body is connected with the focusing mirror device;

one end of the insulating sleeve is connected to one end, far away from the focusing lens device, of the connecting main body; and

the nozzle is connected to one end, far away from the connecting body, of the insulating sleeve.

Optionally, the device further comprises an observation mirror device, the observation mirror device is connected between the collimating mirror device and the focusing mirror device, and the observation mirror device is used for observing the condition of the workpiece processing position.

The utility model has the advantages that:

the utility model discloses an optical fiber connecting device who sets gradually by one end to the other end, the collimating mirror device, light beam adjusting device, focusing mirror device and cutting nozzle device, light beam adjusting device includes at least one wedge lens and actuating mechanism, the wedge lens sets up between collimating mirror device and focusing mirror device, every wedge lens is connected with an actuating mechanism in order to drive the wedge lens rotatory around the central axis of wedge lens, can make laser beam motion when the wedge lens is rotatory, laser beam can incide the work piece surface from different angles, the reverberation of work piece surface reflection also can reflect to the laser beam processing head from different angles, avoided the reverberation to concentrate to shine the same position at the laser beam processing head, reduced the damage to laser beam processing head and the laser instrument of being connected with the laser head, the life of laser beam processing head is improved; meanwhile, the wedge-shaped lens can enable the light beams to move to form different tracks, the workpiece is cut by utilizing the movement of the light beams, the processing speed is high, the processing precision is high, and the minimum precision can reach the micron level, so that the fine cutting can be realized.

Drawings

Fig. 1 is a schematic perspective view of a laser processing head for cutting according to an embodiment of the present invention;

fig. 2 is a schematic perspective view of another viewing angle of a laser processing head for cutting according to an embodiment of the present invention;

fig. 3 is a schematic top view of a laser processing head for cutting with a cutting nozzle device removed according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 3;

FIG. 5 is a schematic cross-sectional view taken along line B-B of FIG. 3;

fig. 6 is a schematic cross-sectional view of a light beam adjusting device according to an embodiment of the present invention;

fig. 7 is a schematic perspective view of a second connecting seat according to an embodiment of the present invention;

fig. 8 is an exploded view of a dust-proof mechanism according to an embodiment of the present invention;

fig. 9 is an exploded schematic view of the lens barrel, the driven wheel and the first retainer ring according to the embodiment of the present invention;

fig. 10 is a schematic perspective view of a cutting nozzle device according to an embodiment of the present invention;

fig. 11 is a schematic cross-sectional view of a cutting nozzle device according to an embodiment of the present invention.

In the figure:

1. an optical fiber connection device;

2. a collimating mirror device;

3. a light beam adjusting device; 31. a first connecting seat; 32. a second connecting seat; 33. a first dust cover; 34. a wedge-shaped lens; 35. a first barrel; 351. a flange; 36. a dust-proof mechanism; 361. a first retainer ring; 3611. an annular projection; 362. a second retainer ring; 3621. an annular groove; 37. a first drive mechanism; 371. a power source; 372. a transmission assembly; 3721. a driving wheel; 3722. a transmission belt; 3723. a driven wheel; 38. a baffle ring; 39. a partition plate;

4. a focusing mirror device; 41. a focus mount; 42. a focusing lens base; 43. a second barrel; 44. a focusing lens; 45. a second drive mechanism; 451. a knob; 452. a ball screw; 453. a guide rail; 454. a second dust cover; 455. a graduated scale; 46. a focus protection mirror mechanism; 461. a lens holder; 462. protecting the lens; 47. a gas path homogenizing mechanism; 471. an air flow groove; 472. an inner ring of gas; 4721. air holes;

5. a cutting nozzle device; 51. a connecting body; 52. an insulating sleeve; 53. a nozzle; 54. locking a ring;

6. a sight glass device; 61. a beam combining mirror; 62. a monochromatic light-transmitting mirror; 63. a mirror; 64. a third connecting seat; 65. a CCD camera; 66. and (5) observing the mounting seat.

Detailed Description

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention will be further explained by the following embodiments with reference to fig. 1 to 11.

The present embodiment provides a laser processing head for cutting, as shown in fig. 1 to 5, the laser processing head for cutting includes an optical fiber connection device 1, a collimating lens device 2, a focusing lens device 4, and a cutting nozzle device 5, which are sequentially arranged from one end to the other end, the laser processing head for cutting further includes a beam adjustment device 3, the beam adjustment device 3 includes at least one wedge-shaped lens 34 and a first driving mechanism 37, the wedge-shaped lens 34 is arranged between the collimating lens device 2 and the focusing lens device 4, and each wedge-shaped lens 34 is connected with one first driving mechanism 37 to drive the wedge-shaped lens 34 to rotate around the central axis of the wedge-shaped lens 34.

In this embodiment, the wedge-shaped lens 34 can move the laser beam when rotating, the laser beam can be incident to the surface of the workpiece from different angles, and the reflected light reflected by the surface of the workpiece can also be reflected to the laser processing head from different angles, so that the reflected light is prevented from being intensively irradiated to the same position of the laser processing head, the damage to the laser processing head and a laser connected with the laser head is reduced, and the service life of the laser processing head is prolonged. The wedge-shaped lens 34 can move the light beams to form different tracks, and the light beam movement is used for cutting workpieces, so that the processing speed is high, the processing precision is high, and the minimum precision can reach the micron level, and the fine cutting can be realized.

In order to further form a more complex movement track by the laser beam, optionally, there are two wedge lenses 34, two wedge lenses 34 are arranged in parallel at intervals, and each wedge lens 34 is connected with a first driving mechanism 37. The two wedge-shaped lenses 34 can rotate independently, and the laser beams can form more complex motion tracks through the cooperation of the two wedge-shaped lenses 34. The arrangement of two wedge-shaped lenses 34 is not intended to limit the present invention, for example, the wedge-shaped lenses 34 may be arranged in three, four or five, etc. according to actual requirements.

As shown in fig. 4 and fig. 6 to 9, the light beam adjusting device 3 further includes a first connecting seat 31, a second connecting seat 32 and a dust-proof mechanism 36, the first connecting seat 31 is connected to the collimating lens device 2, a wedge-shaped lens 34 is rotatably connected to the first connecting seat 31, and the wedge-shaped lens 34 is hermetically connected to an inner wall of the first connecting seat 31. One end of the second connecting seat 32 is connected to the first connecting seat 31, the second connecting seat 32 is arranged opposite to the first connecting seat 31, a cavity is formed between the first connecting seat 31 and the second connecting seat 32, a wedge-shaped lens 34 is rotatably connected in the second connecting seat 32, the wedge-shaped lens 34 is hermetically connected with the second connecting seat 32, and the light beam can sequentially penetrate through the two wedge-shaped lenses 34. The dust-proof mechanism 36 is disposed in the cavity and between the two wedge-shaped lenses 34, and the dust-proof mechanism 36 is used for blocking dust from entering between the two wedge-shaped lenses 34.

It can be understood that the wedge-shaped lens 34 is connected with the inner wall of the first connecting seat 31 or the second connecting seat 32 in a sealing manner, the dustproof mechanism 36 can block dust from entering between the two wedge-shaped lenses 34, so that the wedge-shaped lens 34 can be delayed from being polluted, and the dustproof mechanism 36 is arranged in the cavity, so that external dust can be further isolated, and the service life of the wedge-shaped lens 34 can be prolonged.

In order to facilitate the installation of the wedge-shaped lens 34 and better protect the wedge-shaped lens 34, the light beam adjusting device 3 further includes two first lens barrels 35, the two first lens barrels 35 are both disposed in the cavity, one end of one first lens barrel 35 is rotatably connected to the first connecting seat 31, one end of the other first lens barrel 35 is rotatably connected to the second connecting seat 32, and the two first lens barrels 35 are respectively provided with one wedge-shaped lens 34. Specifically, the first barrel 35 may be rotatably connected to the first connection holder 31 or the second connection holder 32 through a bearing. One end of the first connecting seat 31 and one end of the second connecting seat 32, which are away from each other, are respectively provided with a stop ring 38, the stop rings 38 are detachably connected to the first connecting seat 31 or the second connecting seat 32 and stop against the end surface of the bearing, and the first lens barrel 35 can be prevented from moving along the direction of the central axis thereof by the stop rings 38.

In order to stably fix the wedge-shaped lens 34 in the first barrel 35, the light beam adjusting device 3 in this embodiment further includes a spring pressing ring, the inner wall of the first barrel 35 is provided with a platform surface, one end of the wedge-shaped lens 34 abuts against the platform surface, and the spring pressing ring is disposed in the first barrel 35 and abuts against the other end surface of the wedge-shaped lens 34 to fix the wedge-shaped lens 34 in the first barrel 35.

As shown in fig. 6 and 9, the dust-proof mechanism 36 includes a first retaining ring 361 and a second retaining ring 362, and the first retaining ring 361 is connected to one of the two first barrels 35. The second stopper 362 is attached to the other of the two first barrels 35. One of the end surface of the first retaining ring 361 facing the second retaining ring 362 and the end surface of the second retaining ring 362 facing the first retaining ring 361 is provided with an annular protrusion 3611, the other end of the first retaining ring is provided with an annular groove 3621, the annular protrusion 3611 is arranged in the annular groove 3621, and a gap is reserved between the annular protrusion 3611 and the annular groove 3621. It can be understood that a part of dust can be blocked outside by the outer side wall of the annular groove 3621, dust entering the annular groove 3621 can be blocked by the annular protrusion 3611 and deposited at the bottom of the annular groove 3621, and meanwhile, the inner side wall of the annular groove 3621 can further block a part of dust, so that the arrangement of the annular protrusion 3611 and the annular groove 3621 delays the two wedge lenses 34 from being polluted without influencing the respective rotation of the two wedge lenses 34, and the service life of the wedge lenses 34 is prolonged.

As shown in fig. 6, the first driving mechanism 37 includes a power source 371 and a transmission assembly 372, and the power source 371 is connected to the first connecting seat 31 or the second connecting seat 32. Transmission assembly 372 sets up in the cavity, and the input of transmission assembly 372 is connected in the output of power source 371, and the output of transmission assembly 372 is connected in first lens cone 35. Alternatively, power source 371 is an electric motor. The driving assembly 372 is disposed in the cavity, so that dust brought from outside by the driving assembly 372 to the periphery of the first lens barrel 35 can be reduced, and dust entering between the two wedge-shaped lenses 34 can be further reduced.

As shown in fig. 6, the exterior of the power source 371 is covered with a first dust cover 33. The first dust cover 33 is disposed to block external dust from entering the cavity.

The light beam adjusting device 3 in this embodiment further includes a partition 39, the partition 39 is disposed in the middle of the cavity so that the cavity is divided into a first cavity and a second cavity, the input end of the transmission assembly 372 is disposed in the first cavity, the output end of the transmission assembly 372 is disposed in the second cavity, and the partition 39 is provided with an avoiding groove so that the transmission assembly 372 passes through the partition 39. The input end and the output end of the transmission assembly 372 are separated by the partition plate 39, so that mutual pollution of the first chamber and the second chamber can be reduced, and the second chamber can be prevented from being polluted by dirt generated by the power source 371.

Optionally, the drive assembly 372 includes a drive wheel 3721, a driven wheel 3723, and a drive belt 3722, the drive wheel 3721 being connected to the output of the power source 371. The driven wheel 3723 is sleeved on the outer wall of the first lens barrel 35. The driving belt 3722 is wound around the driving pulley 3721 and the driven pulley 3723. The flange 351 is provided on the first barrel 35 of the transmission belt 3722 far from the first retaining ring 361 or the second retaining ring 362, the outer diameters of the first retaining ring 361 and the second retaining ring 362 are larger than the outer diameter of the driven wheel 3723, and the two ends of the driven wheel can be respectively abutted against the flange 351 and the first retaining ring 361 or the second retaining ring 362, so that the deviation of the transmission belt 3722 can be prevented.

As shown in fig. 4 and 5, the focusing lens device 4 includes a focusing mount 41, a focusing lens holder 42, a second barrel 43, a focusing lens 44, and a second driving mechanism 45, and the focusing mount 41 has a hollow cavity. The focus lens holder 42 is disposed in the focus mount 41. The second barrel 43 is disposed in the focus lens holder 42. The focusing lens 44 is disposed in the second barrel 43. The second driving mechanism 45 can drive the focusing lens base 42 to move along the central axis direction of the focusing lens 44 so as to drive the focusing lens 44 to move. The position of the focusing lens 44 can be adjusted by the second driving mechanism 45, so that the position of the laser focus on the workpiece can be adjusted, the position of the focus is matched with the thickness, the material and the like of the workpiece, and a better processing effect can be achieved.

Optionally, the second drive mechanism 45 includes a guide track 453, a second dust cover 454, and a ball screw 452. The guide track 453 is provided on an inner wall of the focus mount 41, and the focus lens holder 42 is slidably connected to the guide track 453. A mounting hole is formed at a position corresponding to the focus lens holder 42 on one side of the focus mounting base 41, and the second dust cover 454 is disposed on one side of the focus mounting base 41 and seals the mounting hole. The ball screw 452 is disposed in the second dust cover 454, the focusing lens holder 42 is connected to an output end of the ball screw 452, and the focusing lens holder 42 can be driven to move along a central axis direction of the focusing lens 44 by rotating the ball screw 452. Alternatively, the focus lens holder 42 is connected to the output end of the ball screw 452 by an L-shaped connecting plate, one side of which is connected to the nut of the ball screw 452, and the other side is connected to the outer wall of the focus lens holder 42. By adjusting the position of the focal point by the ball screw 452, the precision of the movement of the focus lens mount 42 is higher, and the focus lens mount 42 can move along the guide rail 453, so that the movement of the focus lens mount 42 is more stable.

Further, one end of the ball screw 452 is connected with a knob 451, and the knob 451 is marked with scale lines, so that the rotating distance of the knob 451 can be controlled accurately. The inner wall of the knob 451 cover is also provided with dustproof cotton, so that when the knob 451 cover is closed, the dustproof cotton can also compress the knob 451, so that the ball screw 452 is locked, and the second lens barrel 43 is prevented from shaking. However, the present embodiment is not limited to the embodiment in which the ball screw 452 is driven to rotate by the rotation knob 451, and for example, the present invention may also drive the ball screw 452 to rotate by the stepping motor.

Optionally, the second driving mechanism 45 further includes a scale 455, the scale 455 is connected to the output end of the ball screw 452, and a window configured to view the scale of the scale 455 is provided at one side of the second dust cover 454. Through the arrangement of the graduated scale 455 and the window, it is possible to easily obtain an initial scale, thereby facilitating adjustment of the distance moved by the ball screw 452 according to the initial scale.

As shown in fig. 4 and 5, the focusing lens device 4 further includes a focusing protective lens mechanism 46, the focusing protective lens mechanism 46 is disposed in the focusing mounting seat 41 and located below the focusing lens seat 42, the focusing protective lens mechanism 46 is used for protecting the focusing lens 44, the focusing protective lens mechanism 46 includes a lens holder 461 and a protective lens 462, the protective lens 462 is disposed in the lens holder 461, a first mounting groove is formed in one side of the focusing mounting seat 41, and the lens holder 461 is mounted in the first mounting groove.

Further, as shown in fig. 4 and 5, the focusing mirror device 4 in the present embodiment further includes an air path homogenizing mechanism 47, and the air path homogenizing mechanism 47 can homogenize the air flow in the focusing mounting seat 41, blow the homogenized air flow to the protective lens 462, and blow the homogenized air flow out of the bottom of the cutting nozzle device 5 after being reflected by the protective lens 462.

Specifically, the air path homogenizing mechanism 47 includes an air inner ring 472, the air inner ring 472 is disposed in the focusing mounting seat 41, the outer edges of the two ends of the air inner ring 472 are hermetically connected with the inner wall of the focusing mounting seat 41, an annular airflow groove 471 is formed between the outer wall of the middle section and the inner wall of the focusing mounting seat 41, a plurality of air holes 4721 are disposed on the wall of the air inner ring 472 and are inclined upward toward the protection lens 462, the plurality of air holes 4721 are uniformly distributed along the circumferential direction of the air inner ring 472 and are communicated with the airflow groove 471, and the airflow groove 471 is communicated with an external airflow source. Alternatively, the inclination angle of the air holes 4721 is 45 degrees, and the arrangement of the inclination angle of the air holes 4721 can make the air flow more uniform. The arrangement of the airflow groove 471 and the airflow hole 4721 can enable airflow to be uniformly blown to the protective lenses 462, the airflow uniformly and stably flows out after being reflected by the protective lenses 462, welding slag on the surface of a workpiece is rapidly blown away through uniform and stable high-speed airflow, and welding quality can be improved. Meanwhile, when the airflow blows to the protective lens 462, the protective lens 462 can be prevented from being polluted by dust deposited on the protective lens 462, heat generated by the protective lens 462 can be taken away, and the service life of the protective lens 462 is prolonged.

As shown in fig. 5, the laser processing head for cutting in the present embodiment further includes an observation mirror device 6, the observation mirror device 6 is connected between the collimator mirror device 2 and the focusing mirror device 4, and the observation mirror device 6 is used to observe the condition of the workpiece processing site.

Specifically, the observation mirror mechanism is including observing mount pad 66, the beam combiner 61, third connecting seat 64, CCD camera 65 and set up the monochromatic printing opacity mirror 62 in the inner chamber of third connecting seat 64, speculum 63, the both ends of observing mount pad 66 are connected respectively in collimating mirror device 2 and focusing mirror device 4, third connecting seat 64 sets up in the one side of observing mount pad 66, and the inner chamber of third connecting seat 64 and the inner chamber intercommunication of observing mount pad 66, the slope of beam combiner 61 sets up in observing mount pad 66, monochromatic printing opacity mirror 62 is vertical to be set up in one side of beam combiner 61, speculum 63 slope sets up in the opposite side of monochromatic printing opacity mirror 62, CCD camera 65 is connected in the top of third connecting seat 64. The processing condition of the workpiece is reflected by the beam combining mirror 61 to become a horizontal optical fiber, the horizontal optical fiber penetrates through the monochromatic light transmitting mirror 62 to reach the reflecting mirror 63, the horizontal optical fiber is reflected by the reflecting mirror 63 to be transmitted to the CCD camera 65, and the CCD camera 65 can shoot the processing condition of the workpiece.

As shown in fig. 2, 10 and 11, the cutting nozzle device 5 includes a connecting body 51, an insulating sleeve 52 and a nozzle 53, and one end of the connecting body 51 is connected to the focusing lens device 4. One end of the insulating sleeve 52 is connected to the end of the connecting body 51 remote from the focusing lens device 4. A nozzle 53 is attached to the end of the insulating sleeve 52 remote from the connecting body 51. The provision of the insulating sleeve 52 helps to keep the connecting body 51 away from the nozzle 53 due to the relatively high temperature of the nozzle 53 during laser machining, protecting the connecting body 51 to some extent. In particular, the insulative sleeve 52 is also high temperature resistant and can function properly at the high temperatures generated during laser machining, and ceramic materials are typically used. Optionally, the insulating sleeve 52 is threadably connected to the nozzle 53 for ease of installation and replacement. The insulating sleeve 52 is connected with the connecting body 51 through a locking ring 54, one end of the insulating sleeve 52 close to the connecting body 51 is provided with a boss, one end of the locking ring 54 far away from the connecting body 51 abuts against one end of the boss far away from the connecting body 51, and the other end of the locking ring 54 is connected with the connecting body 51, so that the connecting body 51 and the insulating sleeve 52 are tightly connected.

In this embodiment, the laser beam is collimated by the collimating lens device 2, passes through the beam adjusting device 3, moves while the wedge lens 34 rotates, is focused by the focusing lens 44, and is incident on the surface of the workpiece through the nozzle 53. The laser beam can be incident to the surface of the workpiece from different angles, reflected light reflected by the surface of the workpiece can be reflected to the laser processing head from different angles, the reflected light is prevented from being intensively irradiated at the same position of the laser processing head, damage to the laser processing head and a laser connected with the laser head is reduced, and the service life of the laser processing head is prolonged. The wedge-shaped lens 34 can move the light beams to form different tracks, and the light beam movement is used for cutting workpieces, so that the processing speed is high, the processing precision is high, and the minimum precision can reach the micron level, and the fine cutting can be realized.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims (10)

1. The utility model provides a laser beam machining head for cutting, includes by optical fiber connection device (1), collimating mirror device (2), focusing mirror device (4) and cutting nozzle device (5) that one end to the other end set gradually, its characterized in that, a laser beam machining head for cutting still includes:

the light beam adjusting device (3) comprises at least one wedge-shaped lens (34) and a first driving mechanism (37), the wedge-shaped lens (34) is arranged between the collimating lens device (2) and the focusing lens device (4), one first driving mechanism (37) is connected to each wedge-shaped lens (34), and the first driving mechanism (37) is used for driving the wedge-shaped lens (34) to rotate around the central axis of the wedge-shaped lens (34).

2. Laser machining head for cutting according to claim 1, characterized in that said wedge-shaped lenses (34) are two, two of said wedge-shaped lenses (34) being arranged in parallel spaced apart relationship, one of said first driving mechanisms (37) being associated with each of said wedge-shaped lenses (34).

3. Laser machining head for cutting according to claim 2, characterized in that said beam adjustment means (3) further comprise:

the first connecting seat (31), the first connecting seat (31) is connected to the collimating lens device (2), one wedge-shaped lens (34) is rotatably connected to the first connecting seat (31), and the wedge-shaped lens (34) is hermetically connected with the inner wall of the first connecting seat (31);

the light source device comprises a second connecting seat (32), one end of the second connecting seat (32) is connected to the first connecting seat (31), the second connecting seat (32) is arranged opposite to the first connecting seat (31), a cavity is formed between the first connecting seat (31) and the second connecting seat (32), one wedge-shaped lens (34) is connected in the second connecting seat (32) in a rotating mode, the wedge-shaped lens (34) is connected with the second connecting seat (32) in a sealing mode, and light beams can sequentially penetrate through the two wedge-shaped lenses (34); and

and the dustproof mechanism (36) is arranged in the cavity and positioned between the two wedge-shaped lenses (34), and the dustproof mechanism (36) is used for blocking dust from entering between the two wedge-shaped lenses (34).

4. Laser machining head for cutting according to claim 3, characterized in that said beam adjustment means (3) further comprise:

the two first lens cones (35) are arranged in the cavity, one end of one first lens cone (35) is rotatably connected to the first connecting seat (31), one end of the other first lens cone (35) is rotatably connected to the second connecting seat (32), and the two first lens cones (35) are respectively provided with one wedge-shaped lens (34).

5. Laser machining head for cutting according to claim 4, characterized in that said dust-proof mechanism (36) comprises:

a first retaining ring (361), the first retaining ring (361) being connected to one of the two first barrels (35); and

a second retaining ring (362), the second retaining ring (362) being connected to the other of the two first barrels (35);

wherein, first retaining ring (361) orientation the terminal surface of second retaining ring (362) with second retaining ring (362) orientation one of the terminal surface of first retaining ring (361) is provided with annular bulge (3611), and another is provided with annular groove (3621), annular bulge (3611) set up in annular groove (3621), just annular bulge (3611) with leave the clearance between annular groove (3621).

6. Laser machining head for cutting according to claim 1, characterized in that said focusing mirror means (4) comprise:

a focus mount (41) having a hollow cavity;

the focusing mirror base (42), the focusing mirror base (42) is arranged in the focusing installation base (41);

a second barrel (43), the second barrel (43) being disposed within the focus lens mount (42);

a focusing lens (44), the focusing lens (44) being disposed within the second barrel (43); and

the second driving mechanism (45) can drive the focusing lens seat (42) to move along the central axis direction of the focusing lens (44) so as to drive the focusing lens (44) to move.

7. Laser machining head for cutting according to claim 6, characterized in that said second driving mechanism (45) comprises:

a guide rail (453), wherein the guide rail (453) is arranged on the inner wall of the focusing installation seat (41), and the focusing lens seat (42) is connected with the guide rail (453) in a sliding mode;

a first dustproof cover (33), wherein a mounting hole is formed in one side of the focusing mounting seat (41) corresponding to the position of the focusing lens seat (42), and the first dustproof cover (33) is arranged on one side of the focusing mounting seat (41) and seals the mounting hole; and

the ball screw (452) is arranged in the first dustproof cover (33), the focusing lens base (42) is connected to the output end of the ball screw (452), and the ball screw (452) is rotated to drive the focusing lens base (42) to move along the direction of the central axis of the focusing lens (44).

8. Laser machining head for cutting according to claim 7, characterized in that the second drive mechanism (45) further comprises a graduated scale (455), the graduated scale (455) being connected to the output end of the ball screw (452), one side of the first dust cover (33) being provided with a window configured to view the graduation of the graduated scale (455).

9. Laser machining head for cutting according to any one of claims 1 to 8, characterized in that said cutting nozzle means (5) comprise:

a connecting body (51), wherein one end of the connecting body (51) is connected to the focusing mirror device (4);

an insulating sleeve (52), wherein one end of the insulating sleeve (52) is connected to one end of the connecting body (51) far away from the focusing lens device (4); and

a nozzle (53), the nozzle (53) being connected to an end of the insulating sleeve (52) remote from the connecting body (51).

10. Laser machining head for cutting according to any one of claims 1 to 8, characterised in that it further comprises a sight glass device (6), said sight glass device (6) being connected between said collimator glass device (2) and said focusing glass device (4), said sight glass device (6) being intended to observe the conditions at the work piece machining site.

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