CN111515535B - Coaxial blowing laser processing head - Google Patents
Coaxial blowing laser processing head Download PDFInfo
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- CN111515535B CN111515535B CN202010463734.9A CN202010463734A CN111515535B CN 111515535 B CN111515535 B CN 111515535B CN 202010463734 A CN202010463734 A CN 202010463734A CN 111515535 B CN111515535 B CN 111515535B
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- lens
- wedge
- focusing
- seat
- connecting seat
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/03—Observing, e.g. monitoring, the workpiece
- B23K26/032—Observing, e.g. monitoring, the workpiece using optical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/04—Automatically aligning, aiming or focusing the laser beam, e.g. using the back-scattered light
- B23K26/046—Automatically focusing the laser beam
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/02—Positioning or observing the workpiece, e.g. with respect to the point of impact; Aligning, aiming or focusing the laser beam
- B23K26/06—Shaping the laser beam, e.g. by masks or multi-focusing
- B23K26/064—Shaping the laser beam, e.g. by masks or multi-focusing by means of optical elements, e.g. lenses, mirrors or prisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/12—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure
- B23K26/123—Working by laser beam, e.g. welding, cutting or boring in a special atmosphere, e.g. in an enclosure in an atmosphere of particular gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/14—Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
- B23K26/1462—Nozzles; Features related to nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
- B23K26/702—Auxiliary equipment
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a coaxial blowing laser processing head, and belongs to the technical field of laser processing. The coaxial blowing 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 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 connecting sleeve, one end of the connecting sleeve is connected with the focusing lens device, the other end of the connecting sleeve is connected with the nozzle, and the length of the connecting sleeve is adjustable. The invention improves the service life of the laser processing head and the protection effect on welding spots.
Description
Technical Field
The invention relates to the technical field of laser processing, in particular to a coaxial blowing laser processing head.
Background
Along with the continuous expansion of laser application, laser is widely applied in the welding field, and the laser beam of the existing laser welding device is static, so that single facula welding cannot meet the requirements of various processing technologies, such as inconvenient processing of high-reflection materials, workpieces with different weld widths and the like, and welding spots cannot be better protected, and the welding spots are oxidized.
Disclosure of Invention
The invention aims to provide a coaxial blowing laser processing head which can enable laser beams to move, prolong the service life of the processing head and improve the protection effect on welding spots.
To achieve the purpose, the invention adopts the following technical scheme:
The coaxial blowing laser processing head comprises an optical fiber connecting device, a collimating mirror device, a focusing mirror device and a welding nozzle device which are sequentially arranged from one end to the other end, wherein shielding gas is blown out of the welding nozzle device, the coaxial blowing laser processing head further comprises a light beam adjusting device, 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 mirror device and the focusing mirror 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 connecting sleeve, one end of the connecting sleeve is connected with the focusing lens device, the other end of the connecting sleeve is connected with the nozzle, and the length of the connecting sleeve is adjustable.
Optionally, two wedge lenses are arranged in parallel at intervals, and each wedge lens is connected with one first driving mechanism respectively.
Optionally, the beam adjusting device further includes:
The first connecting seat is connected with the collimating lens device, one wedge-shaped lens is rotationally connected to the first connecting seat, and the wedge-shaped lens is connected with the inner wall of the first connecting seat in a sealing way;
One end of the second connecting seat is connected with 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, the second connecting seat is internally and rotatably connected with one wedge-shaped lens, the wedge-shaped lens is in sealing connection with the second connecting seat, and light beams can sequentially penetrate through the two wedge-shaped lenses; and
The dustproof mechanism is arranged in the cavity and positioned between the two wedge-shaped lenses, and the dustproof mechanism is used for blocking dust from entering between the two wedge-shaped lenses.
Optionally, the beam adjusting device further includes:
The two first lens barrels are arranged in the cavity, one end of each first lens barrel is rotationally connected with the first connecting seat, one end of each first lens barrel is rotationally connected with the second connecting seat, and one wedge-shaped lens is respectively arranged in each first lens barrel.
Optionally, the dust-proof mechanism includes:
a first retainer ring connected to one of the two first lens barrels; and
A second retainer ring connected to the other of the two first barrels;
the first check ring faces towards the end face of the second check ring and one of the end faces of the second check ring faces towards the first check ring is provided with an annular protrusion, the other one 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 includes:
The focusing installation seat is provided with a hollow cavity;
the focusing lens seat is arranged in the focusing mounting seat;
the second lens barrel is arranged in the focusing lens base;
a focusing lens disposed in the second barrel; and
The second driving mechanism can drive the focusing lens seat to move along the central axis direction of the focusing lens so as to drive the focusing lens to move.
Optionally, the second driving mechanism includes:
The guide rail is arranged on the inner wall of the focusing installation seat, and the focusing mirror seat is in sliding connection with the guide rail;
A first dust cover, a mounting hole is arranged on one side of the focusing mounting seat corresponding to the focusing mirror seat, the first dust cover is arranged on one side of the focusing installation seat and seals the installation hole; and
The ball screw is arranged in the first dust cover, the focusing lens seat is connected to the output end of the ball screw, and the ball screw can be rotated to drive the focusing lens seat to move along the central axis direction of the focusing lens.
Optionally, the second driving mechanism further includes a graduated scale, the graduated 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 graduations of the graduated scale.
Optionally, the welding nozzle device further comprises a locking member, and the connecting sleeve comprises:
one end of the first cylinder is connected with the focusing lens device;
One end of the second cylinder is sleeved at one end of the first cylinder far away from the focusing lens device in a sliding way, and the other end of the second cylinder is connected with the nozzle;
The locking piece is arranged between the first cylinder body and the second cylinder body so as to fix the second cylinder body at any position.
Optionally, the device further comprises a viewing mirror device, wherein the viewing mirror device is connected between the collimating mirror device and the focusing mirror device and is used for viewing the condition of a workpiece processing place.
The beneficial effects of the invention are as follows:
The invention 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 protective gas is blown out of the welding nozzle device, 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 one driving mechanism to drive the wedge-shaped lens to rotate around the central axis of the wedge-shaped lens, the laser beam can move when the wedge-shaped lens rotates, the laser beam can be incident on the surface of a workpiece from different angles, reflected light reflected by the surface of the workpiece can be reflected on the laser processing head from different angles, 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 head is reduced, and the service life of the laser processing head is prolonged; meanwhile, the wedge-shaped lens can enable the light beam to move to form different tracks, and welding of welding seams with different widths can be achieved; the welding nozzle device comprises a nozzle and a connecting sleeve, the length of the connecting sleeve is adjustable, and the distance between the connecting sleeve and a workpiece is adapted by adjusting the length of the connecting sleeve, so that the protection effect of the protection gas on welding spots is improved.
Drawings
FIG. 1 is a schematic perspective view of a coaxial blowing laser processing head according to an embodiment of the present invention;
FIG. 2 is a schematic perspective view of another view of a coaxial blowing laser processing head according to an embodiment of the present invention;
FIG. 3 is a schematic top view of a coaxial blowing laser processing head according to an embodiment of the present invention with a welding nozzle device removed;
FIG. 4 is a schematic cross-sectional view of the structure at A-A in FIG. 3;
FIG. 5 is a schematic cross-sectional view of the structure at B-B in FIG. 3;
FIG. 6 is a schematic cross-sectional view of a beam adjusting device according to an embodiment of the present invention;
fig. 7 is a schematic perspective view of a second connection seat according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of an exploded view of a dust-proof mechanism according to an embodiment of the present invention;
fig. 9 is a schematic diagram of an exploded structure of a lens barrel, a driven wheel and a first retainer ring according to an embodiment of the present invention;
FIG. 10 is a schematic view of an exploded view of a welding nozzle device according to an embodiment of the present invention;
fig. 11 is a schematic cross-sectional view of a welding nozzle device according to an embodiment of the present invention.
In the figure:
1. An optical fiber connection device;
2. A collimator lens device;
3. A beam adjustment device; 31. a first connection base; 32. a second connecting seat; 33. a first dust cap; 34. wedge-shaped lenses; 35. a first barrel; 351. a flange; 36. a dust-proof mechanism; 361. a first retainer ring; 3611. an annular protrusion; 362. the second check ring; 3621. an annular groove; 37. a first driving mechanism; 371. a power source; 372. a transmission assembly; 3721. a driving wheel; 3722. a transmission belt; 3723. driven wheel; 38. a baffle ring; 39. a partition plate;
4. A focusing mirror device; 41. a focusing mounting base; 42. a focusing lens base; 43. a second barrel; 44. a focusing lens; 45. a second driving mechanism; 451. a knob; 452. a ball screw; 453. a guide rail; 454. a second dust cap; 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. a gas flow groove; 472. an inner gas ring; 4721. air holes;
5. Welding a nozzle device; 51. a connecting sleeve; 511. a first cylinder; 512. a second cylinder; 52. a nozzle; 53. a locking member; 531. a locking ring; 532. a holding ring;
6. A scope device; 61. a beam combining lens; 62. a monochromatic light transmission lens; 63. a reflecting mirror; 64. a third connecting seat; 65. a CCD camera; 66. and observing the mounting seat.
Detailed Description
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, 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 specifically stated or limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, and may be, for example, either fixed or removable; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Unless expressly stated or limited otherwise, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact with each other by way of additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The technical scheme of the invention is further described below by means of specific embodiments in combination with the accompanying drawings 1-11.
The present embodiment provides a coaxial blowing laser processing head, as shown in fig. 1 to 5, the coaxial blowing laser processing head includes an optical fiber connection device 1, a collimator 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 welding nozzle device 5 blows out a protective gas, the coaxial blowing laser processing head further includes a beam adjusting device 3, the beam adjusting device 3 includes at least one wedge lens 34 and a first driving mechanism 37, the wedge lens 34 is arranged between the collimator lens device 2 and the focusing lens device 4, and each wedge lens 34 is connected with a first driving mechanism 37 to drive the wedge lens 34 to rotate around a central axis of the wedge lens 34;
the welding nozzle device 5 comprises a nozzle 52 and a connecting sleeve 51, one end of the connecting sleeve 51 is connected to the focusing lens device 4, the other end is connected to the nozzle 52, and the length of the connecting sleeve 51 is adjustable.
In this embodiment, the wedge lens 34 can move the laser beam when rotating, the laser beam can be incident to the surface of the workpiece from different angles, the 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 to the same position of the laser processing head, the damage to the laser processing head and the laser connected with the laser head is reduced, and the service life of the laser processing head is prolonged. By enabling the movement of the beam by the wedge lens 34, different trajectories are formed, enabling the welding of welds of different widths. By adjusting the length of the connecting sleeve 51 to adapt to the distance from the beam to the workpiece, the protection effect of the shielding gas on the welding spot is improved.
To further the laser beam to form a more complex motion profile, optionally, there are two wedge lenses 34, two wedge lenses 34 are arranged in parallel and spaced apart, and each wedge lens 34 is connected to a first driving mechanism 37. The two wedge lenses 34 can rotate independently, and the laser beam can form a more complex movement track through the cooperation of the two wedge lenses 34. The provision of two wedge lenses 34 is not intended to limit the present invention, for example, wedge lenses 34 may also be provided as three, four, five, etc. as desired.
As shown in fig. 4 and fig. 6 to fig. 9, the 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 lens 34 is rotatably connected to the first connecting seat 31, and the wedge 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 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 rotationally connected to the second connecting seat 32, the wedge-shaped lens 34 is in sealing connection with the second connecting seat 32, and light beams can sequentially penetrate through the two wedge-shaped lenses 34. A dust prevention mechanism 36 is disposed within the cavity between the two wedge lenses 34, the dust prevention mechanism 36 being configured to block dust from entering between the two wedge lenses 34.
It will be appreciated that the wedge lens 34 is in sealing connection with the inner wall of the first connection seat 31 or the second connection seat 32, the dust-proof mechanism 36 can prevent dust from entering between the two wedge lenses 34, so that the wedge lenses 34 can be delayed from being polluted, and the dust-proof mechanism 36 is arranged in the cavity, so that external dust can be further isolated, and the service life of the wedge lenses 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 comprises two first lens barrels 35, the two first lens barrels 35 are all arranged 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 one wedge-shaped lens 34 is respectively arranged in the two first lens barrels 35. Specifically, the first lens barrel 35 may be rotatably connected to the first connection base 31 or the second connection base 32 through a bearing. The end that first connecting seat 31 and second connecting seat 32 deviate from each other is provided with the baffle ring 38 respectively, and baffle ring 38 can dismantle in first connecting seat 31 or second connecting seat 32 to stop in the terminal surface of bearing, baffle ring 38's setting can prevent that first lens cone 35 from following its central axis direction drunkenness.
In order to enable the wedge-shaped lens 34 to be stably fixed in the first lens barrel 35, the light beam adjusting device 3 in the present embodiment further includes a spring pressing ring, wherein a flat surface is provided on an inner wall of the first lens barrel 35, one end of the wedge-shaped lens 34 is pressed against the flat surface, and the spring pressing ring is provided in the first lens barrel 35 and is abutted against the other end surface of the wedge-shaped lens 34 to fix the wedge-shaped lens 34 in the first lens barrel 35.
As shown in fig. 6 and 9, the dust-proof mechanism 36 includes a first collar 361 and a second collar 362, the first collar 361 being connected to one of the two first barrels 35. The second retainer ring 362 is connected to the other of the two first barrel 35. Wherein, one of the end surface of the first check ring 361 facing the second check ring 362 and the end surface of the second check ring 362 facing the first check ring 361 is provided with an annular protrusion 3611, the other end 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 will be appreciated that a portion of the dust can be blocked by the outer sidewall of the annular recess 3621, and the dust entering the annular recess 3621 can be blocked by the annular protrusion 3611 and deposited on the bottom of the annular recess 3621, and meanwhile, the inner sidewall of the annular recess 3621 can further block a portion of the dust, so that the arrangement of the annular protrusion 3611 and the annular recess 3621 can delay the contamination of the two wedge-shaped lenses 34 without affecting the respective rotation of the two wedge-shaped lenses 34, and the service life of the wedge-shaped 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 connection seat 31 or the second connection seat 32. The transmission assembly 372 is disposed in the cavity, an input end of the transmission assembly 372 is connected to an output end of the power source 371, and an output end of the transmission assembly 372 is connected to the first lens barrel 35. Alternatively, power source 371 is an electric motor. The placement of the transmission assembly 372 within the cavity reduces the transmission assembly 372 from carrying external dust around the first barrel 35, thereby further reducing dust entering between the two wedge lenses 34.
As shown in fig. 6, the outer housing of the power source 371 is provided with a first dust cap 33. The first dust cap 33 is provided to block external dust from entering the cavity.
The 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 an avoidance slot is formed in the partition 39 so that the transmission assembly 372 passes through the partition 39. The separation of the input and output ends of the drive assembly 372 by the partition 39 can slow down the mutual contamination of the first and second chambers while also blocking the contamination of the second chamber by the contaminants generated by the power source 371.
Optionally, the transmission assembly 372 includes a driving pulley 3721, a driven pulley 3723, and a belt 3722, and the driving pulley 3721 is connected to an output end 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 first lens barrel 35 of the driving belt 3722 far away from the first check ring 361 or the second check ring 362 is provided with a flange 351, the outer diameters of the first check ring 361 and the second check ring 362 are larger than the outer diameter of the driven wheel 3723, and two driven ends can be respectively abutted against the flange 351 and the first check ring 361 or the second check ring 362, so that the driving belt 3722 can be prevented from deviating.
As shown in fig. 4 and 5, the focus mirror device 4 includes a focus mount 41, a focus mirror mount 42, a second lens barrel 43, a focus lens 44, and a second driving mechanism 45, the focus mount 41 having a hollow cavity. The focusing lens holder 42 is disposed in the focusing mount 41. The second lens barrel 43 is disposed in the focusing lens holder 42. The focusing lens 44 is disposed in the second barrel 43. The second driving mechanism 45 can drive the focusing lens holder 42 to move along the central axis direction of the focusing lens 44 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, and the position of the focus is matched with the thickness, the material and the like of the workpiece, thereby achieving better processing effect.
Optionally, the second drive mechanism 45 includes a rail 453, a second dust cover 454, and a ball screw 452. The guide 453 is provided on the inner wall of the focusing mount 41, and the focusing mirror mount 42 is slidably connected to the guide 453. One side of the focusing mounting seat 41 is provided with a mounting hole corresponding to the focusing mirror seat 42, and the second dust cover 454 is arranged on one side of the focusing mounting seat 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 ball screw 452 can be rotated to drive the focusing lens holder 42 to move along the 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 connection plate, one side of the L-shaped connection plate is connected to a nut of the ball screw 452, and the other side is connected to the outer wall of the focusing lens holder 42. The position of the focus is adjusted by the ball screw 452, the accuracy of the movement of the focusing lens holder 42 is higher, and the focusing lens holder 42 can move along the guide rail 453, so that the movement of the focusing lens holder 42 is smoother.
Further, one end of the ball screw 452 is connected with a knob 451, and graduation marks are marked on the knob 451, so that the distance of rotation of the knob 451 can be controlled conveniently. The inner wall of knob 451 lid still is provided with dustproof cotton, when playing dustproof effect, when closing the knob 451 lid, dustproof cotton can also compress tightly knob 451 to make ball screw 452 locking, avoid second lens cone 43 to rock. The manner in which the ball screw 452 is driven to rotate by the rotation knob 451 in the present embodiment is not limited to the present invention, and for example, the present invention may also be driven to rotate the ball screw 452 by a stepping motor.
Optionally, the second driving mechanism 45 further includes a scale 455, where the scale 455 is connected to an output end of the ball screw 452, and a window is provided on one side of the second dust cover 454, and the window is configured to observe the scale of the scale 455. Through the setting of scale 455 and window, can be convenient for acquire initial scale to be convenient for adjust ball screw 452 removal's distance according to initial scale.
As shown in fig. 4 and 5, the focusing lens device 4 further includes a focusing protection lens mechanism 46, the focusing protection lens mechanism 46 is disposed in the focusing mounting seat 41 and is located below the focusing lens seat 42, the focusing protection lens mechanism 46 is used for protecting the focusing lens 44, the focusing protection lens mechanism 46 includes a lens holder 461 and a protection lens 462, the protection lens 462 is disposed in the lens holder 461, a first mounting groove is provided on 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 and5, the focusing mirror device 4 in this embodiment further includes a gas path homogenizing mechanism 47, and the gas path homogenizing mechanism 47 can homogenize the gas flow in the focusing mount 41 and blow the gas flow toward the protective lens 462, and blow the gas flow out from 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 two ends of the air inner ring 472 are in sealing connection with the inner wall of the focusing mounting seat 41, an annular air flow 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 which incline upwards towards the protective lens 462 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 air flow groove 471, and the air flow groove 471 is communicated with an external air flow source. Alternatively, the inclination angle of the air holes 4721 is 45 degrees, and the air holes 4721 are arranged at an inclination angle to make the air flow more uniform. Through the setting of air current groove 471 and air vent 4721 can make the even blowing of air current to protection lens 462, evenly steady outflow after reflecting through protection lens 462, through even steady high-speed air current to blow away the welding slag on work piece surface rapidly, can improve welding quality. Meanwhile, when the air flow blows to the protective lens 462, dust deposited on the protective lens 462 can be prevented from polluting 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 coaxial blowing laser processing head in the present embodiment further includes a scope device 6, the scope device 6 is connected between the collimator lens device 2 and the focusing lens device 4, and the scope device 6 is used for observing the condition of the workpiece processing place.
Specifically, the observation mirror mechanism includes an observation mount 66, a beam combining mirror 61, a third connecting seat 64, a CCD camera 65, and a monochromatic lens 62 and a reflecting mirror 63 which are arranged in an inner cavity of the third connecting seat 64, wherein two ends of the observation mount 66 are respectively connected with the collimating mirror device 2 and the focusing mirror device 4, the third connecting seat 64 is arranged on one side of the observation mount 66, the inner cavity of the third connecting seat 64 is communicated with the inner cavity of the observation mount 66, the beam combining mirror 61 is obliquely arranged in the observation mount 66, the monochromatic lens 62 is vertically arranged on one side of the beam combining mirror 61, the reflecting mirror 63 is obliquely arranged on the other side of the monochromatic lens 62, and the CCD camera 65 is connected with the top end of the third connecting seat 64. The processing condition of the workpiece is changed into a horizontal optical fiber after being reflected by the beam combining mirror 61, the horizontal optical fiber passes through the monochromatic lens 62 and then reaches the reflecting mirror 63, the horizontal optical fiber is reflected by the reflecting mirror 63 and then is 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 welding nozzle device 5 further includes a locking member 53, and the connection sleeve 51 includes a first cylinder 511 and a second cylinder 512, and one end of the first cylinder 511 is connected to the focusing lens device 4. One end of the second cylinder 512 is slidably sleeved on one end of the first cylinder 511 away from the focusing lens device 4, and the other end is connected to the nozzle 52. The locking member 53 is disposed between the first cylinder 511 and the second cylinder 512 to fix the second cylinder 512 at an arbitrary position.
Optionally, the locking member 53 includes a locking ring 531 and a holding ring 532, the holding ring 532 is slidably sleeved on the second barrel 512, an inner conical surface is disposed at an end of the first barrel 511 away from the focusing lens device 4, the holding ring 532 is provided with an outer conical surface matched with the inner conical surface, the locking ring 531 is sleeved on the second barrel 512, one end of the locking ring 531 abuts against an end surface of the holding ring 532 away from the focusing lens device 4, and the other end is in threaded connection with an outer wall of the first barrel 511. Releasing the locking ring 531 can move the second cylinder 512 relative to the first cylinder 511, and locking the locking ring 531 can fix the second cylinder 512 relative to the first cylinder. Optionally, in order to enable the locking member 53 to stably fix the second cylinder 512, a plurality of clamping jaws are disposed at intervals around the circumference of the holding ring 532, and the clamping jaws can tightly fit the second cylinder 512 when the locking ring 531 is locked, so that the holding ring 532 is more tightly connected with the second cylinder 512.
In order to facilitate the adjustment of the position of the second cylinder 512, the surface of the second cylinder 512 is provided with graduations along the axial direction of the second cylinder 512, and the position of the second cylinder 512 relative to the first cylinder 511 can be conveniently and precisely adjusted by observing the graduations.
In this embodiment, the laser beam is formed into a parallel beam by the collimator lens device 2, and the laser beam is moved by the beam adjusting device 3 when the wedge lens 34 rotates, and then focused by the focusing lens 44, and is incident on the surface of the workpiece by the nozzle 52. 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 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. By enabling the movement of the beam by the wedge lens 34, different trajectories are formed, enabling the welding of welds of different widths. By adjusting the length of the connecting sleeve 51 to adapt to the distance from the beam to the workpiece, the protection effect of the shielding gas on the welding spot is improved.
The technical principle of the present invention is described above in connection with the specific embodiments. The description is made for the purpose of illustrating the general principles of the invention and should not be taken in any way as limiting the scope of the invention. Other embodiments of the invention will be apparent to those skilled in the art from consideration of this specification without undue burden.
Claims (4)
1. The utility model provides a coaxial laser processing head that blows, includes optical fiber connection device (1), collimating mirror device (2), focusing mirror device (4) and welding nozzle device (5) that set gradually by one end to the other end, it has shielding gas to blow out in the welding nozzle device (5), its characterized in that, coaxial laser processing head that blows still includes:
A light beam adjusting device (3), wherein 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), each wedge-shaped lens (34) is connected with one first driving mechanism (37), 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 (52) and a connecting sleeve (51), one end of the connecting sleeve (51) is connected with the focusing mirror device (4), the other end of the connecting sleeve is connected with the nozzle (52), and the length of the connecting sleeve (51) is adjustable;
Two wedge-shaped lenses (34) are arranged in parallel at intervals, and each wedge-shaped lens (34) is connected with one first driving mechanism (37) respectively;
the beam adjustment device (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 rotationally connected to the first connecting seat (31), and the wedge-shaped lens (34) is in sealing connection with the inner wall of the first connecting seat (31);
The 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 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 rotationally connected to the second connecting seat (32), the wedge-shaped lens (34) is in sealing connection with the second connecting seat (32), and light beams can sequentially penetrate through the two wedge-shaped lenses (34); and
A dust prevention mechanism (36) arranged in the cavity and positioned between the two wedge-shaped lenses (34), wherein the dust prevention mechanism (36) is used for preventing dust from entering between the two wedge-shaped lenses (34);
the beam adjustment device (3) further comprises:
The two first lens barrels (35), the two first lens barrels (35) are arranged 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 one wedge-shaped lens (34) is respectively arranged in the two first lens barrels (35);
The dust prevention mechanism (36) includes:
a first retainer ring (361), the first retainer ring (361) being connected to one of the two first barrels (35); and
A second retainer ring (362), the second retainer ring (362) being connected to the other of the two first lens barrels (35);
Wherein one of an end surface of the first check ring (361) facing the second check ring (362) and an end surface of the second check ring (362) facing the first check ring (361) is provided with an annular protrusion (3611), the other one 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);
The focusing mirror device (4) comprises:
a focus mount (41) having a hollow cavity;
A focusing lens seat (42), wherein the focusing lens seat (42) is arranged in the focusing mounting seat (41);
a second lens barrel (43), the second lens barrel (43) being disposed within the focusing lens holder (42);
a focusing lens (44), wherein the focusing lens (44) is arranged in the second lens 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;
the second driving mechanism (45) includes:
The guide rail (453) is arranged on the inner wall of the focusing installation seat (41), and the focusing mirror seat (42) is in sliding connection with the guide rail (453);
A first dust cover (33), wherein a mounting hole is formed in one side of the focusing mounting seat (41) corresponding to the focusing mirror seat (42), and the first dust cover (33) is arranged on one side of the focusing mounting seat (41) and seals the mounting hole; and
Ball screw (452), ball screw (452) set up in first shield (33), focusing mirror seat (42) connect in the output of ball screw (452), rotate ball screw (452) can drive focusing mirror seat (42) are followed the central axis direction of focusing lens (44) removes.
2. The coaxial blowing laser machining head according to claim 1, characterized in that the second drive mechanism (45) further comprises a scale (455), the scale (455) being connected to the output of the ball screw (452), a window being provided on one side of the first dust cap (33), the window being configured to view the scale of the scale (455).
3. Coaxial blowing laser processing head according to any of claims 1-2, characterized in that the welding nozzle device (5) further comprises a locking member (53), said connecting sleeve (51) comprising:
a first cylinder (511) having one end connected to the focusing mirror device (4);
A second cylinder (512), one end of which is slidably sleeved at one end of the first cylinder (511) far away from the focusing mirror device (4), and the other end of which is connected with the nozzle (52);
The locking piece (53) is arranged between the first cylinder (511) and the second cylinder (512) so as to fix the second cylinder (512) at any position.
4. The coaxial blowing laser processing head according to any of claims 1-2, further comprising a scope device (6), said scope device (6) being connected between said collimator lens device (2) and said focusing lens device (4), said scope device (6) being adapted to observe the condition of the workpiece processing site.
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| CN202010463734.9A CN111515535B (en) | 2020-05-27 | 2020-05-27 | Coaxial blowing laser processing head |
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| CN202010463734.9A CN111515535B (en) | 2020-05-27 | 2020-05-27 | Coaxial blowing laser processing head |
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| CN113305427B (en) * | 2021-05-26 | 2022-11-22 | 北京航空航天大学 | Water-guided laser device |
| CN113369682A (en) * | 2021-06-28 | 2021-09-10 | 成都飞机工业（集团）有限责任公司 | Light path system integration device for laser processing |
| CN114012273B (en) * | 2021-11-11 | 2022-11-01 | 中国科学院力学研究所 | A gas protection device for inner rotating laser head for inner wall processing |
| CN217253588U (en) * | 2022-04-26 | 2022-08-23 | 上海嘉强自动化技术有限公司 | Laser processing head |
| CN115255617A (en) * | 2022-09-13 | 2022-11-01 | 深圳欧斯普瑞智能科技有限公司 | Visual laser welding head capable of adjusting size of light spot |
| CN115958293A (en) * | 2023-01-16 | 2023-04-14 | 北京石油化工学院 | Underwater laser processing device |
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| CN212311157U (en) * | 2020-05-27 | 2021-01-08 | 岗春激光科技（江苏）有限公司 | Coaxial air-blowing laser processing head |
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| JP6159513B2 (en) * | 2012-09-04 | 2017-07-05 | 株式会社アマダホールディングス | Laser processing head |
| CN206643498U (en) * | 2017-01-11 | 2017-11-17 | 深圳迪能激光科技有限公司 | Focus lamp adjustable laser cutting head and laser cutting machine |
| CN208132193U (en) * | 2017-12-11 | 2018-11-23 | 无锡超强伟业科技有限公司 | Laser cutting system power-driven focusing mechanism and electromotion focusing cutting head |
| CN110899958A (en) * | 2019-12-25 | 2020-03-24 | 岗春激光科技（江苏）有限公司 | Handheld laser processing head and laser processing equipment |
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