CN111496382A

CN111496382A - Paraxial wire-filling laser processing head

Info

Publication number: CN111496382A
Application number: CN202010462304.5A
Authority: CN
Inventors: 蒋修青; 朱小杰
Original assignee: Gangchun Laser Technology Jiangsu Co ltd
Current assignee: Gangchun Laser Technology Jiangsu Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2020-08-07

Abstract

The invention discloses a paraxial wire filling laser processing head, and belongs to the technical field of laser processing. The paraxial wire filling laser processing head comprises an optical fiber connecting device, a collimating lens device, a light beam adjusting device, a focusing lens device and a welding nozzle device which are sequentially arranged from one end to the other end, 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 mechanisms are used for driving the wedge-shaped lenses to rotate around the central axis of the wedge-shaped lenses; the welding nozzle device comprises a nozzle, a wire feeding mechanism and a protective gas blowing mechanism, wherein the nozzle is connected with the focusing lens device, and the wire feeding mechanism and the protective gas blowing mechanism are respectively arranged on two sides of the nozzle. The invention prolongs the service life of the laser processing head and enlarges the application range of the invention.

Description

Paraxial wire-filling laser processing head

Technical Field

The invention relates to the technical field of laser processing, in particular to a paraxial wire filling laser processing head.

Background

With the continuous expansion of laser application, laser is widely applied in the welding field, the laser beam of the existing laser welding device is static, and single light spot welding cannot meet the requirements of various processing technologies, such as the inconvenience of processing high-reflection materials and workpieces with wide welding seams.

Disclosure of Invention

The invention aims to provide a paraxial wire-filling laser processing head which can move laser beams, prolong the service life of the processing head and expand the application range of the processing head.

In order to achieve the purpose, the invention adopts the following technical scheme:

a paraxial wire filling laser processing head comprises an optical fiber connecting device, a collimating lens device, a focusing lens device and a welding 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 welding 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 welding nozzle device further comprises:

and the air knife mechanism is arranged between the focusing lens device and the nozzle and can blow out transverse air flow which is transversely swept above the nozzle.

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 invention has the beneficial effects that:

the optical fiber laser processing device comprises an optical fiber connecting device, a collimating mirror device, a light beam adjusting device, a focusing mirror device and a welding nozzle device which are sequentially arranged from one end to the other end, wherein the light beam adjusting device comprises at least one wedge-shaped lens and a driving mechanism, the wedge-shaped lens is arranged between the collimating mirror device and the focusing mirror device, each wedge-shaped lens is connected with the driving mechanism to drive the wedge-shaped lens to rotate around the central axis of the wedge-shaped lens, the wedge-shaped lens can enable laser beams to move when rotating, the laser beams can be incident to the surface of a workpiece from different angles, reflected light reflected by the surface of the workpiece can also be reflected to the laser processing head from different angles, the reflected light is prevented from being intensively irradiated to the same position of the laser processing head, damage to the laser processing head and a laser connected with; the welding nozzle device comprises a nozzle and a wire feeding mechanism, the nozzle is connected with the focusing mirror device, the wire feeding mechanism is arranged on one side of the nozzle, the wire feeding mechanism feeds wires on the side of a welding spot and the movement of a laser beam can weld a workpiece with a wide welding seam, and the application range of the invention is expanded.

Drawings

Fig. 1 is a schematic perspective view of a paraxial wire-filling laser processing head according to an embodiment of the present invention;

FIG. 2 is a schematic perspective view of another perspective view of a paraxial wire-filling laser processing head according to an embodiment of the present invention;

FIG. 3 is a schematic top view of a paraxial wire-filling laser processing head with the welding nozzle assembly removed in accordance with 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 beam conditioning apparatus 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 a schematic diagram of an exploded view of a dust protection mechanism provided in accordance with an embodiment of the present invention;

fig. 9 is an exploded 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 perspective view of a welding nozzle assembly according to an embodiment of the present invention;

FIG. 11 is a side view schematic of a nozzle and air knife mechanism provided in accordance with an embodiment of the present invention;

fig. 12 is a schematic sectional view at C-C in fig. 11.

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 welding nozzle device; 51. a wire feeder; 511. a wire feeding pipe; 52. an air knife mechanism; 521. a first connecting plate; 522. an air seat; 523. a second connecting plate; 53. a nozzle; 54. a protective gas blowing mechanism; 541. an air tap; 542. an air nozzle adjusting assembly; 5421. a first connecting rod; 5422. a second connecting rod; 5423. a third connecting rod;

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", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

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 is further explained by the following embodiments with reference to the attached fig. 1-12.

The embodiment provides a paraxial wire filling laser processing head, as shown in fig. 1 to 5, the paraxial wire filling laser processing head comprises an optical fiber connecting device 1, a collimating lens device 2, a focusing lens device 4 and a welding nozzle device 5 which are sequentially arranged from one end to the other end, the paraxial wire filling laser processing head further comprises a light beam adjusting device 3, 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, and each wedge-shaped lens 34 is connected with the first driving mechanism 37 to drive the wedge-shaped lens 34 to rotate around the central axis of the wedge-shaped lens 34. The welding nozzle device 5 includes a nozzle 53 and a wire feeder 51, the nozzle 53 is connected to the focusing mirror device 4, and the wire feeder 51 is disposed on one side of the nozzle 53.

In this embodiment, the wedge-shaped lens 34 can move the laser beam when rotating, the laser beam can be incident on the surface of the workpiece from different angles, 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 on the same position of the laser processing head, the damage to the laser processing head and a laser connected with the laser processing head is reduced, the wire feeding mechanism 51 can weld the workpiece with a wide welding seam by feeding the wire at the side of the welding spot and the movement of the laser beam, and the application range of the invention is expanded.

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 the actual requirement.

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 driving mechanism 45 includes a guide track 453, a second dust cap 454, and a ball screw 452, the guide track 453 is disposed on an inner wall of the focusing mount 41, the focusing lens holder 42 is slidably connected to the guide track 453, a mounting hole is formed at a position of one side of the focusing mount 41 corresponding to the focusing lens holder 42, the second dust cap 454 is disposed at a side of the focusing mount 41 and seals the mounting hole, the ball screw 452 is disposed in the second dust cap 454, the focusing lens holder 42 is connected to an output end of the ball screw 452, the ball screw 452 is rotated to drive the focusing lens holder 42 to move along a central axis direction of the focusing lens 44, optionally, the focusing lens holder 42 is connected to the output end of the ball screw 452 through an L-shaped connecting plate, one side of the L-shaped connecting plate is connected to a nut of the ball screw 452, and the other side of the ball screw 452 is connected to an outer wall of the focusing lens holder 42.

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 rotated by the rotation knob 451, and for example, the present invention may be configured such that the ball screw 452 is rotated by a 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 this 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 base 41, blow the air flow toward the protective lens 462, and blow the air flow out of the bottom of the welding 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 inclined upward toward the protective lens are disposed on the wall of the air inner ring 472, 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 paraxial wire filling laser processing head 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 and fig. 10 to 12, the welding nozzle device 5 further includes an air knife mechanism 52, the air knife mechanism 52 being disposed between the focusing lens device 4 and the nozzle 53, the air knife mechanism 52 being capable of blowing a lateral air flow that sweeps across the nozzle 53. The air knife mechanism 52 further includes a first connecting plate 521, an air seat 522 and a second connecting plate 523, which are sequentially disposed, the first connecting plate 521 is connected to the focusing mirror device 4, the first connecting plate 521 and the air seat 522 are disposed at an interval, and one side of the first connecting plate 521 is connected to the third connecting plate, the second connecting plate 523 is connected to a side of the air seat 522 departing from the first connecting plate 521, and a side of the second connecting plate 523 departing from the air seat 522 is connected to the nozzle 53. The air seat 522 is internally provided with a hollow inner cavity, one side of the air seat 522 is provided with an air blowing port which is communicated with the inner cavity of the air seat 522 and is horizontally arranged, and the hollow inner cavity of the air seat 522 is connected with an air flow source.

The welding nozzle device 5 further comprises a protective gas blowing mechanism 54, and the protective gas blowing mechanism 54 can provide welding protective gas so that the welding spot is not oxidized in the welding process. The protection gas blowing mechanism 54 includes a gas nozzle 541 and a gas nozzle adjusting assembly 542, and the gas nozzle adjusting assembly 542 can adjust the inclination angle of the gas nozzle 541. Air cock adjusting part 542 includes the first connecting rod 5421 that connects gradually, second connecting rod 5422 and third connecting rod 5423, the one end of first connecting rod 5421 is fixed, the other end and the second connecting rod 5422 of first connecting rod 5421 are articulated, the one end of second connecting rod 5422 and third connecting rod 5423 is articulated, the other end and the air cock 541 of third connecting rod 5423 are connected, first connecting rod 5421 and second connecting rod 5422, the junction of second connecting rod 5422 and third connecting rod 5423 all is provided with the retaining member, so that air cock 541 is fixed in optional position.

The wire feeder 51 includes a wire feeding tube 511, and the welding wire can be inserted into the wire feeding tube 511 and fed to the surface of the workpiece through the wire feeding tube 511.

In this embodiment, the laser beam is collimated by the collimating lens device 2, passes through the beam adjusting device 3, moves when the wedge lens 34 rotates, is focused by the focusing lens, and is incident on the surface of the workpiece through the nozzle 53. Laser beams can be incident to the surface of a workpiece from different angles, reflected light reflected by the surface of the workpiece can also 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 processing head is reduced, and the service life of the laser processing head is prolonged. The focusing lens device 4 can adjust the position of the focus on the workpiece, and the welding effect of the workpiece is improved. The protective gas blowing mechanism 54 provides welding protective gas, so that welding spots are not oxidized in the welding process, workpieces with wide welding seams can be welded by wire feeding of the wire feeding mechanism 51 beside the welding spots and movement of laser beams, and the application range of the invention is expanded.

The technical principle of the present invention is described above in connection with 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 inventive effort, which would fall within the scope of the present invention.

Claims

1. The utility model provides a paraxial filler wire laser beam machining head, includes by one end optic fibre connecting device (1), collimating mirror device (2), focusing mirror device (4) and welding nozzle device (5) that one end set gradually to the other end, its characterized in that, paraxial filler wire laser beam machining head 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 with 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);

the welding nozzle device (5) comprises a nozzle (53) and a wire feeding mechanism (51), the nozzle (53) is connected to the focusing mirror device (4), and the wire feeding mechanism (51) is arranged on one side of the nozzle (53).

2. The paraxial wire-filling laser machining head as claimed in claim 1 wherein there are two of said wedge segments (34), two of said wedge segments (34) being spaced apart in parallel, each of said wedge segments (34) having a respective one of said first drive mechanisms (37) attached thereto.

3. The paraxial wire-filling laser machining head according to claim 2, characterized in that the beam adjustment means (3) further comprises:

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. A paraxial wire-filling laser machining head according to claim 3, characterized in that the beam adjustment means (3) further comprises:

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. The paraxial wire filling laser machining head as claimed in claim 4, wherein the dust prevention 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. Paraxial wire-filling laser machining head according to claim 1, characterized in that the focusing mirror device (4) comprises:

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. Paraxial wire-filling laser machining head 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. The paraxial filler wire laser machining head as claimed in claim 7 wherein the second drive mechanism (45) further comprises a scale (455), the scale (455) being connected to the output end of the ball screw (452), one side of the first dust cap (33) being provided with a window configured to view the scale of the scale (455).

9. Paraxial wire filling laser machining head according to any one of claims 1 to 8, characterised in that the welding nozzle device (5) further comprises:

an air knife mechanism (52) arranged between the focusing lens device (4) and the nozzle (53), wherein the air knife mechanism (52) can blow out a transverse air flow which is transversely swept above the nozzle (53).

10. The paraxial wire filling laser processing head according to any one of claims 1 to 8 further comprising a sight glass arrangement (6), the sight glass arrangement (6) being connected between the collimating lens arrangement (2) and the focusing lens arrangement (4), the sight glass arrangement (6) being used to view the condition of the workpiece processing site.