CN116024564B - Angle-adjustable laser processing head for processing inner surface - Google Patents
Angle-adjustable laser processing head for processing inner surface Download PDFInfo
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- CN116024564B CN116024564B CN202211443866.0A CN202211443866A CN116024564B CN 116024564 B CN116024564 B CN 116024564B CN 202211443866 A CN202211443866 A CN 202211443866A CN 116024564 B CN116024564 B CN 116024564B
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- 238000012545 processing Methods 0.000 title claims abstract description 42
- 239000000843 powder Substances 0.000 claims abstract description 50
- 239000002184 metal Substances 0.000 claims description 33
- 229910052751 metal Inorganic materials 0.000 claims description 33
- 238000001816 cooling Methods 0.000 claims description 17
- 239000007789 gas Substances 0.000 claims description 10
- 239000002826 coolant Substances 0.000 claims description 9
- 230000008878 coupling Effects 0.000 claims description 9
- 238000010168 coupling process Methods 0.000 claims description 9
- 238000005859 coupling reaction Methods 0.000 claims description 9
- 238000003754 machining Methods 0.000 claims description 7
- 238000004381 surface treatment Methods 0.000 abstract description 9
- 238000013461 design Methods 0.000 abstract description 6
- 239000000654 additive Substances 0.000 abstract description 3
- 230000000996 additive effect Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000004372 laser cladding Methods 0.000 description 8
- 239000000110 cooling liquid Substances 0.000 description 6
- 238000005253 cladding Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 239000000112 cooling gas Substances 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Laser Beam Processing (AREA)
Abstract
The embodiment of the application provides an angle-adjustable laser processing head for processing an inner surface, which is used for rotating a rotating shaft and a reflecting mirror relative to a fixed base, and can realize the relative rotation of a nozzle and the mirror by using proper clearance fit at the interface of the rotating shaft and a disc-shaped connector; allowing independent adjustment of the nozzle and mirror and directing the laser/powder focus at different angles to the workpiece, the inner surface of the pipe or cavity can be machined at different angles, including additive manufacturing, hardening, remelting, etc.; the laser head manufactured by the design of the coaxial nozzle mirror assembly is smaller than the existing adjustable laser head in size, so that the laser head can be installed on a machine for inner surface treatment and reaches a position which is difficult to access deep in a pipeline or a cavity.
Description
Technical Field
The embodiment of the application relates to the technical field of metal surface treatment processes, in particular to an angle-adjustable laser processing head for processing an inner surface.
Background
Laser cladding is a metal surface treatment process widely used for repairing abrasion parts and preparing anti-corrosion coatings in aerospace, marine and offshore industries. Typical laser heads for cladding purposes mainly include nozzles, optics, liquid/gas passages, etc. The nozzle is used to deposit metal powder onto a workpiece, the optics are used to direct and focus a laser beam of molten metal powder, and the liquid/gas channels are used to provide coolant and a protective/carrier gas.
Existing internal surface laser cladding apparatus can only perform cladding tasks at a fixed angle, i.e., at a 90 degree angle from the output laser beam to the cladding surface. However, due to the limited space available for accommodating the laser working head, laser cladding at 90 degrees is difficult in some locations that are difficult to access (e.g., near the bottom of a blind hole or near a crossover joint). Thus, there is a need for an adjustable laser that allows for internal surface treatments at different angles so that the laser beam and powder flow can reach difficult to access locations without having to place the laser head directly above the surface.
Existing laser cladding apparatus all contain subassemblies of nozzles and mirrors with fixed relative positions. When the mirror adjusts the propagation direction of the incident laser beam, the nozzle must also rotate about the same axis at exactly the same angle, moving in the manner of a swing arm. Therefore, the conventional laser cladding apparatus based on the above design is large in working volume, and thus cannot go deep into the interior of the pipe or the cavity to perform the inner surface treatment.
Disclosure of Invention
The embodiment of the application provides an angle-adjustable laser processing head for processing an inner surface, which is used for solving the problem that in the prior art, laser cladding equipment has huge working volume and cannot penetrate into a pipeline or a cavity to process the inner surface.
The technical problem is not solved, and the embodiment of the application provides an angle-adjustable laser processing head for processing an inner surface, which comprises a laser pipeline, a fixed base and a laser working head; the laser pipeline is connected and fixed with one end of the fixed base relatively, and propagates laser beams to the fixed base along a first direction;
the other end of the fixed base is provided with an opening end, the laser working head is fixed at the opening end, a rotating shaft is arranged in the laser working head, and the rotating shaft is perpendicular to the first direction; the rotating shaft is provided with a reflecting mirror, the reflecting mirror receives the laser beam transmitted into the fixed base, and the direction of the laser beam is adjusted by rotating the reflecting mirror through the rotating shaft; the rotatable nozzle is arranged relative to the reflector, and can rotate relatively along the rotating shaft, so that laser beams with the direction adjusted by the reflector are emitted through the rotatable nozzle.
Preferably, the rotatable nozzle includes a laser beam nozzle and a metal powder nozzle, the laser beam nozzle and the metal powder nozzle being focused at the same point; the laser beam nozzle is in the same plane as the first direction, and the same plane is perpendicular to the rotation axis.
Preferably, the laser working head is provided with a plurality of pipe fittings at positions, the pipe fittings comprise a cooling liquid pipe fitting, a gas pipe fitting and a metal powder pipe fitting, the cooling liquid pipe fitting, the gas pipe fitting and the metal powder pipe fitting are respectively used for guiding cooling liquid, gas and metal powder to flow, and the metal powder pipe fitting is communicated with the metal powder nozzle.
Preferably, the fixing base is provided with two opposite extending frames along a first direction, the extending frames are provided with through holes, and the rotating shaft is rotationally fixed on the extending frames through the through holes.
Preferably, the reflecting mirror is semi-cylindrical, the reflecting mirror comprises a plane reflecting surface facing the laser beam, and two ends of the reflecting mirror are provided with coupling parts;
the rotating shaft comprises a first cylindrical shaft and a second cylindrical shaft, and the first cylindrical shaft and the second cylindrical shaft are fixedly connected with the reflecting mirror through the coupler component.
Preferably, a crank rod is arranged at one end of the first cylindrical shaft and/or the second cylindrical shaft, which is far away from the reflecting mirror; the two ends of the first cylinder shaft and the second cylinder shaft are also provided with semi-cylindrical grooves, and the positions of the crank rod and the coupling part corresponding to the semi-cylindrical grooves are provided with bolts matched with the semi-cylindrical grooves.
Preferably, the rotating shaft is also connected with a first disc-shaped connector and a second disc-shaped connector; the first disc-shaped connector and the second disc-shaped connector are connected with the rotating shaft through a through hole at the center of the circle, and a clearance buckle is arranged at the joint of the through hole and the rotating shaft, so that the first disc-shaped connector and the second disc-shaped connector can relatively rotate with the rotating shaft through the clearance buckle;
the rotatable nozzle is secured between the first disc-shaped connector and the second disc-shaped connector.
Preferably, the rotatable nozzle further comprises an arc-shaped bearing surface, the laser beam nozzle and the metal powder nozzle are arranged on the bearing surface, a first cooling channel and a powder channel are further arranged inside the bearing surface, one end of the powder channel is communicated with the metal powder pipe fitting, the other end of the powder channel is communicated with the metal powder nozzle, the first cooling channel is communicated with the cooling liquid pipe fitting, and the first cooling channel extends to the laser beam nozzle.
Preferably, a second cooling channel is arranged at the plane reflecting surface of the reflecting mirror, and a third cooling channel is further arranged in the first cylinder shaft and the second cylinder shaft.
Preferably, the coupling part comprises a cylindrical hole matched with the first cylindrical shaft and the second cylindrical shaft, a threaded through hole is further formed in the side wall of the cylindrical hole, and a threaded hole is formed in the position, corresponding to the through hole, of the first cylindrical shaft and the second cylindrical shaft.
According to the angle-adjustable laser processing head for processing the inner surface, the rotating shaft and the reflecting mirror are rotated relative to the fixed base, and the nozzle and the mirror can relatively rotate by using proper clearance fit at the interface of the rotating shaft and the disc-shaped connector; allowing independent adjustment of the nozzle and mirror and directing the laser/powder focus at different angles to the workpiece, the inner surface of the pipe or cavity can be machined at different angles, including additive manufacturing, hardening, remelting, etc.; the laser head manufactured by the design of the coaxial nozzle mirror assembly is smaller than the existing adjustable laser head in size, so that the laser head can be installed on a machine for inner surface treatment and reaches a position which is difficult to access deep in a pipeline or a cavity.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an optical layout of an angularly adjustable laser processing head according to an embodiment of the application;
FIG. 2 is a schematic view of the overall structure of an angle-tunable laser processing head according to an embodiment of the present application;
FIG. 3 is a side view of an angularly adjustable laser processing head according to an embodiment of the application;
FIG. 4 is a second side view of an angularly adjustable laser processing head according to an embodiment of the application;
FIG. 5 is a schematic view of a mirror mounted on a stationary base in accordance with an embodiment of the application;
FIG. 6 is a schematic diagram of an assembled configuration of a rotatable nozzle, a mirror, and a disk-shaped connector according to an embodiment of the application;
FIG. 7 is a schematic view of a first stationary base according to an embodiment of the application;
FIG. 8 is a second schematic view of a fixing base according to an embodiment of the application;
FIG. 9 is a schematic view of a rotatable nozzle according to an embodiment of the present application;
FIG. 10 is a schematic diagram of a mirror structure according to an embodiment of the present application;
FIG. 11 is a structural perspective view of a mirror according to an embodiment of the present application;
fig. 12 is a structural perspective view of a rotary shaft according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In the embodiment of the present application, the term "and/or" is merely an association relationship describing the association object, which indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone.
The terms "first", "second" in embodiments of the application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the application, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a system, article, or apparatus that comprises a list of elements is not limited to only those elements or units listed but may alternatively include other elements not listed or inherent to such article, or apparatus. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.
Existing laser cladding apparatus all contain subassemblies of nozzles and mirrors with fixed relative positions. When the mirror adjusts the propagation direction of the incident laser beam, the nozzle must also rotate about the same axis at exactly the same angle, moving in the manner of a swing arm. Therefore, the conventional laser cladding apparatus based on the above design is large in working volume, and thus cannot go deep into the interior of the pipe or the cavity to perform the inner surface treatment.
Accordingly, embodiments of the present application provide an angularly adjustable laser processing head for processing an interior surface that allows independent adjustment of the nozzle and mirror and alignment of the laser/powder focus at different angles to the workpiece. The laser head manufactured by the design of the coaxial nozzle mirror assembly is smaller than the existing adjustable laser head in size, so that the laser head can be installed on a machine for inner surface treatment and reaches a position which is difficult to access deep in a pipeline or a cavity. An angularly adjustable laser processing head for processing an inner surface according to an embodiment of the present application is described below with reference to the accompanying drawings.
As shown in fig. 1, the laser processing head of the embodiment of the present application has different angular optical layouts (i.e., positioning of optical elements). The divergent laser beam emitted from the optical fiber first passes through the collimator 1 and then impinges on the dichroic beam combiner 2. The reflected laser light from the beam combiner propagates in the Z direction and passes through the focusing lens 3. The converging laser beam emitted by the focusing lens impinges on the mirror 4, again changing its propagation direction and impinging on the cladding surface 5 of the workpiece. The visible light emitted from the melt pool on the cladding surface 5 propagates in the opposite direction of the laser beam until reaching the dichroic beam combiner 2 having high transmittance for visible light. After passing through the beam combiner 2, the visible light is irradiated to the camera system 6, thereby generating an image for process monitoring. The angle can be changed by rotating the mirror 4 about an axis perpendicular to the direction of propagation of the incident laser beam (i.e. the global Z-axis).
Fig. 2 to 5 show an angle-adjustable laser processing head for processing an inner surface according to an embodiment of the present application, including a laser pipe 7, a fixed base 8, and a laser working head; the laser pipeline 7 is connected and fixed with one end of the fixed base 8 relatively, and the laser pipeline 7 propagates laser beams to the fixed base 8 along a first direction;
the other end of the fixed base 8 is provided with an opening end, the laser working head is fixed at the opening end, a rotating shaft is arranged in the laser working head, and the rotating shaft is perpendicular to the first direction; the rotating shaft is provided with a reflecting mirror 4, the reflecting mirror 4 is used for receiving the laser beam transmitted into the fixed base 8, and the direction of the laser beam is adjusted by rotating the reflecting mirror 4 through the rotating shaft; the rotatable nozzle 9 is also connected to the outside of the rotation shaft, the rotatable nozzle 9 is disposed opposite to the reflector 4, and the rotatable nozzle 9 can rotate relatively along the rotation shaft, so that the laser beam after the direction adjustment of the reflector 4 is emitted through the rotatable nozzle 9. The rotatable nozzle 9 includes a laser beam nozzle and a metal powder nozzle, which are focused at the same point; the laser beam nozzle is in the same plane as the first direction, and the same plane is perpendicular to the rotation axis.
As shown in fig. 2, an incident laser beam propagates in a first direction (+z direction) in the laser tunnel 7 and then enters the laser working head. The fixed base 8 is fixed to the open end of the laser duct 7 and is held stationary with respect to the laser duct 7. Both the rotatable nozzle 9 and the mirror 4 (as shown in fig. 5) are mounted on a fixed base 8.
The pipe fitting 10 is installed to a plurality of positions on the laser working head, pipe fitting 10 includes coolant pipe spare, gas pipe spare and metal powder pipe spare, and coolant pipe spare, gas pipe spare and metal powder pipe spare are used for guiding coolant liquid, gas and metal powder flow respectively, the metal powder pipe spare intercommunication the metal powder nozzle. The pipe 10 is installed at various positions of the laser working head to guide the flow of the coolant, gas and metal powder.
During laser machining, the laser beam (shown in solid lines) and the powder jet (shown in broken lines) are focused at the same point on the workpiece. The angle of incidence can be varied by rotating the rotatable nozzle 9 and the mirror 4 relative to the fixed base 8.
On the basis of the above-described embodiment, as a preferred embodiment, as shown in fig. 7, 8, the fixed base 8 is schematically structured. The incident laser beam propagates in the +z direction and passes through the central passage of the stationary base 8. The stationary base 8 has a plurality of channels therein for guiding the flow of cooling liquid, gas and powder. The fixed base 8 is provided with two opposite extension frames 11 along a first direction, the extension frames 11 are provided with through holes, and the rotating shaft is rotationally fixed on the extension frames 11 through the through holes. The reflecting mirror 4 is semi-cylindrical, the reflecting mirror 4 comprises a plane reflecting surface facing the laser beam, and two ends of the reflecting mirror 4 are provided with coupling parts 19.
The rotating shaft comprises a first cylindrical shaft 121 and a second cylindrical shaft 122, and the first cylindrical shaft 121 and the second cylindrical shaft 122 are fixedly connected with the reflecting mirror 4 through the coupling part 19.
A crank rod is arranged on one end of the first cylinder shaft 121 and/or the second cylinder shaft 122 far away from the reflecting mirror 4; by turning the crank lever, the user can rotate the first cylindrical shaft 121, the second cylindrical shaft 122, and the reflecting mirror 4 with respect to the fixed base 8. The rotation axis of the mirror 4 is perpendicular to the propagation direction (+z) of the incident laser beam, and thus the laser beam can change its direction by rotating the mirror 4.
As shown in fig. 6, after the mirror 4 is mounted on the fixed base 8, the rotatable nozzle 9 is mounted to the mirror 4, fixed base 8 assembly. The rotating shaft is also connected with a first disc-shaped connector 141 and a second disc-shaped connector 142; the first disc-shaped connector 141 and the second disc-shaped connector 142 are connected with the rotating shaft (the first cylindrical shaft 121 and the second cylindrical shaft 122) through holes at the circle center, and clearance buckles are arranged at the connection positions of the through holes and the rotating shaft, so that the first disc-shaped connector 141 and the second disc-shaped connector 142 can relatively rotate with the rotating shaft through the clearance buckles; the rotatable nozzle 9 is fixed between the first disc-shaped connector 141 and the second disc-shaped connector 142.
In order to ensure that the output laser beam always hits the focus of the two powder jets at different laser incidence angles, the rotation angle of the mirror 4 and the rotatable nozzle 9 must be kept at a constant ratio of 1:2. For example, if the laser incident angle is from 90 to 135 °, the rotatable nozzle 9 needs to be rotated at an increment angle of 45 °, and the mirror 4 needs to be rotated at an increment angle of 45 °/2=22.5°, in the same direction as the rotatable nozzle 9. See fig. 1.
On the basis of the above embodiment, as a preferred embodiment, as shown in fig. 9, the rotatable nozzle 9 further includes an arc-shaped bearing surface, the laser beam nozzle and the metal powder nozzle are provided on the bearing surface, and the laser beam nozzle is a through hole provided on the bearing surface; the bearing surface is inside still to be equipped with first cooling channel 15 and powder passageway 16, the one end intercommunication metal powder pipe fitting of powder passageway 16, the other end intercommunication of powder passageway 16 the metal powder nozzle, first cooling channel intercommunication the coolant pipe spare, first cooling channel 15 extends to laser beam nozzle department. The rotatable nozzle 9 selects copper or copper alloy having a relatively high thermal conductivity as the nozzle material, and the inlets of the first cooling passage 15 and the powder passage 16 are located at the side, so that the cooling liquid and the powder can be transferred into the corresponding nozzle through the disk-shaped connectors (first disk-shaped connector, second disk-shaped connector) fixed at the side. The first cooling channel 15 needs to extend near the laser beam nozzle 17 to reduce heat accumulation around it.
In addition to the above-described examples, as a preferred embodiment, a schematic structural view of the reflecting mirror 4 is shown in fig. 10 and 11. The mirror 4 is semi-cylindrical with a planar reflective surface facing the incident laser beam, with copper as the specular material, and the reflective surface is polished to a specular finish to improve the reflection. The plane reflecting surface of the reflecting mirror 4 is provided with a second cooling channel 18 to reduce heat accumulation caused by direct irradiation of laser, and the first and second cylinder shafts 121 and 122 are also provided with a third cooling channel 20.
On the basis of the above embodiment, as a preferred embodiment, as shown in fig. 12, the coupling member 19 includes a cylindrical hole matching with the first and second cylindrical shafts 121 and 122, a threaded through hole is further provided in a sidewall of the cylindrical hole, and a threaded hole 21 is provided at a position of the first and second cylindrical shafts 121 and 122 corresponding to the through hole so as to insert a screw to prevent the shaft from sliding off the reflecting mirror 4. The two ends of the first and second cylindrical shafts 121 and 122 are further provided with semi-cylindrical grooves 22, and the positions of the crank rod and the coupling part 19 corresponding to the semi-cylindrical grooves 22 are provided with bolts matched with the semi-cylindrical grooves 22, so that the bolts can be inserted to avoid the relative rotation of the rotating shaft and the reflecting mirror 4.
In summary, according to the angle-adjustable laser processing head for processing an inner surface provided by the embodiment of the application, the rotating shaft and the reflecting mirror are rotated relative to the fixed base, and the nozzle and the mirror can be rotated relatively by using proper clearance fit at the interface of the rotating shaft and the disc-shaped connector; allowing independent adjustment of the nozzle and mirror and directing the laser/powder focus at different angles to the workpiece, the inner surface of the pipe or cavity can be machined at different angles, including additive manufacturing, hardening, remelting, etc.; the laser head manufactured by the design of the coaxial nozzle mirror assembly is smaller than the existing adjustable laser head in size, so that the laser head can be installed on a machine for inner surface treatment and reaches a position which is difficult to access deep in a pipeline or a cavity.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. An angle-adjustable laser processing head for processing an inner surface is characterized by comprising a laser pipeline, a fixed base and a laser working head; the laser pipeline is connected and fixed with one end of the fixed base relatively, and propagates laser beams to the fixed base along a first direction;
the other end of the fixed base is provided with an opening end, the laser working head is fixed at the opening end, a rotating shaft is arranged in the laser working head, and the rotating shaft is perpendicular to the first direction; the rotating shaft is provided with a reflecting mirror, the reflecting mirror receives the laser beam transmitted into the fixed base, and the direction of the laser beam is adjusted by rotating the reflecting mirror through the rotating shaft; the rotatable nozzle is arranged relative to the reflector, and can rotate relatively along the rotating shaft, so that laser beams with the direction adjusted by the reflector are emitted through the rotatable nozzle.
2. The angularly adjustable laser processing head for processing an inner surface of claim 1 wherein the rotatable nozzle comprises a laser beam nozzle and a metal powder nozzle, the laser beam nozzle and the metal powder nozzle being focused at the same point; the laser beam nozzle is in the same plane as the first direction, and the same plane is perpendicular to the rotation axis.
3. The angularly adjustable laser processing head for machining an inner surface according to claim 2 wherein a plurality of locations on the laser processing head are mounted with tubes including coolant tube, gas tube and metal powder tube for directing the flow of coolant, gas and metal powder respectively, the metal powder tube being in communication with the metal powder nozzle.
4. The angularly adjustable laser processing head for machining an inner surface according to claim 1 wherein the fixed base is provided with two opposed extension frames in a first direction, the extension frames being provided with through holes, the rotation shaft being rotatably fixed to the extension frames through the through holes.
5. The angularly adjustable laser processing head for processing an inner surface according to claim 4 wherein said reflector is semi-cylindrical, said reflector includes a planar reflecting surface facing the laser beam, and coupling members are provided at both ends of said reflector;
the rotating shaft comprises a first cylindrical shaft and a second cylindrical shaft, and the first cylindrical shaft and the second cylindrical shaft are fixedly connected with the reflecting mirror through the coupler component.
6. The angularly adjustable laser machining head for machining an inner surface according to claim 5 wherein the first cylindrical shaft and/or the second cylindrical shaft is provided with a crank rod on an end thereof remote from the reflecting mirror; the two ends of the first cylinder shaft and the second cylinder shaft are also provided with semi-cylindrical grooves, and the positions of the crank rod and the coupling part corresponding to the semi-cylindrical grooves are provided with bolts matched with the semi-cylindrical grooves.
7. The angularly adjustable laser processing head for processing an inner surface according to claim 1 wherein the rotating shaft is further connected with a first disc-shaped connector and a second disc-shaped connector; the first disc-shaped connector and the second disc-shaped connector are connected with the rotating shaft through a through hole at the center of the circle, and a clearance buckle is arranged at the joint of the through hole and the rotating shaft, so that the first disc-shaped connector and the second disc-shaped connector can relatively rotate with the rotating shaft through the clearance buckle;
the rotatable nozzle is secured between the first disc-shaped connector and the second disc-shaped connector.
8. The angularly adjustable laser processing head for machining an inner surface according to claim 3 wherein the rotatable nozzle further comprises an arcuate bearing surface, the laser beam nozzle and the metal powder nozzle being disposed on the bearing surface, a first cooling channel and a powder channel being disposed within the bearing surface, one end of the powder channel being in communication with the metal powder tube, the other end of the powder channel being in communication with the metal powder nozzle, the first cooling channel being in communication with the coolant tube, the first cooling channel extending to the laser beam nozzle.
9. The angularly adjustable laser processing head for processing an inner surface according to claim 5 wherein a second cooling channel is provided at the planar reflective surface of the reflector and a third cooling channel is further provided in the first and second cylindrical shafts.
10. The angularly adjustable laser processing head for machining an inner surface according to claim 6 wherein the coupler member comprises cylindrical bores matched with the first and second cylindrical shafts, the side walls of the cylindrical bores further being provided with threaded through holes, and threaded holes being provided at positions of the first and second cylindrical shafts corresponding to the through holes.
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| US4387952A (en) * | 1981-03-27 | 1983-06-14 | Spectra-Physics, Inc. | Single axis beam scanner |
| US4577087A (en) * | 1983-06-29 | 1986-03-18 | Fairey Engineering Limited | Apparatus for laser welding pipes and the like |
| CN202595277U (en) * | 2012-05-17 | 2012-12-12 | 温州大学 | Laser cladding side direction powder delivering machining head |
| CN203782233U (en) * | 2014-04-04 | 2014-08-20 | 兰晋 | Laser cladding equipment for inner wall of minor-caliber pipeline |
| CN107505715A (en) * | 2017-09-05 | 2017-12-22 | 福建工程学院 | A kind of annular laser cladding head completely |
| CN110453217A (en) * | 2019-09-06 | 2019-11-15 | 陕西天元智能再制造股份有限公司 | A kind of width hot spot deep hole laser melting coating head |
| CN113529069A (en) * | 2021-07-02 | 2021-10-22 | 西安交通大学 | Angle-carrying rotatable inner hole laser cladding end device suitable for different apertures |
| CN215560673U (en) * | 2021-08-02 | 2022-01-18 | 豪利机械(苏州)有限公司 | Inner hole laser cladding device |
| CN216237282U (en) * | 2021-11-21 | 2022-04-08 | 南京中科煜宸激光技术有限公司 | Coaxial powder feeding laser cladding head for laser cladding of inner surface of pipeline part |
| CN115287653A (en) * | 2022-08-26 | 2022-11-04 | 齐鲁工业大学 | Laser cladding device and method for inner wall of pipe fitting |
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| CN116024564A (en) | 2023-04-28 |
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