CN115815806A - Laser welding device - Google Patents
Laser welding device Download PDFInfo
- Publication number
- CN115815806A CN115815806A CN202211673247.0A CN202211673247A CN115815806A CN 115815806 A CN115815806 A CN 115815806A CN 202211673247 A CN202211673247 A CN 202211673247A CN 115815806 A CN115815806 A CN 115815806A
- Authority
- CN
- China
- Prior art keywords
- prism
- laser beam
- assembly
- laser
- reflector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Laser Beam Processing (AREA)
Abstract
The embodiment of the application discloses laser welding device. Laser welding device includes the laser output subassembly, reflector assembly, focusing lens, send a subassembly and light path adjusting part, the laser output subassembly is used for exporting laser beam, reflector assembly includes the first speculum that sets gradually along laser beam's output light path, second mirror and third speculum, first through-hole has been seted up on the third speculum, focusing lens sets up on the reflection light path of third speculum, the second through-hole has been seted up to the position that corresponds first through-hole on the focusing lens, send a subassembly to pass first through-hole and second through-hole in proper order, light path adjusting part is connected with first speculum and second mirror. This application passes through the vibration of light path adjusting part drive first speculum and second mirror to make laser beam can follow the circumferential motion who send a subassembly output behind speculum subassembly and the focusing lens, thereby make send the energy distribution of sending laser beam more even around the subassembly.
Description
Technical Field
The application relates to the field of laser welding, in particular to a laser welding device.
Background
The laser welding has the characteristics of high energy density, high welding efficiency, low heat input and small deformation of the welded workpiece. With the reduction of the cost of the laser and the wider application, the trend of replacing the traditional welding process by laser welding gradually becomes. The laser wire-filling welding technology not only has the advantage of laser welding, but also can improve the adaptability of a welding gap, can weld workpieces with larger gaps, and can reduce the defects of welding seams and improve the performance of the welding seams due to the introduction of welding wires.
The existing laser wire filling welding technology is generally paraxial wire feeding, when the paraxial wire feeding is carried out, the wire feeding direction of a welding wire has obvious limitation on a welding track, so that only some simple tracks and workpieces can be welded, and meanwhile, the wire feeding angle and the wire feeding position have great influence on a welding process, so that the paraxial wire feeding welding stability is poor. Compared with paraxial wire feeding, the coaxial wire feeding welding has the advantages of good consistency, uniform weld joint forming, high welding speed and the like, can weld complex track workpieces, and is more widely applied. At present, the coaxial wire-feeding laser welding technology is mainly realized by adopting a plurality of laser light sources, and splitting a single light source into multipath light or splitting the light into annular light. However, it is difficult to ensure the uniformity of the beam quality whether multiple laser light sources are used or the light sources are used for light splitting, so that the energy of the laser beam is unevenly distributed around the wire feeding assembly.
Disclosure of Invention
The embodiment of the application provides a laser welding device, can solve the uneven problem of distribution around sending a subassembly of laser beam's energy.
The embodiment of the application provides a laser welding device, includes:
the laser output assembly is used for outputting a laser beam;
the reflecting mirror assembly comprises a first reflecting mirror, a second reflecting mirror and a third reflecting mirror which are sequentially arranged along the output optical path of the laser beam; the third reflector is provided with a first through hole;
the focusing lens is arranged on a reflection light path of the third reflector; a second through hole is formed in the position, corresponding to the first through hole, of the focusing lens;
the wire feeding assembly sequentially penetrates through the first through hole and the second through hole, and the output end of the wire feeding assembly is positioned on one side, away from the third reflector, of the focusing lens;
the light path adjusting component is used for driving the first reflector and the second reflector to vibrate so that the laser beam sequentially passes through the reflector component and the rear edge of the focusing lens to move circumferentially at the output end of the wire feeding component.
Optionally, in some embodiments of the present application, the optical path adjusting component includes a first vibration motor and a second vibration motor; the first vibration motor is connected with the first reflector and used for driving the first reflector to vibrate so as to adjust the motion track of the laser beam reflected by the first reflector; the second vibration motor is connected with the second reflector and used for driving the second reflector to vibrate so as to adjust the movement track of the laser beam reflected by the second reflector.
Optionally, in some embodiments of the present application, the laser welding apparatus includes a first prism assembly located between the second mirror and the wire feed assembly, and the movement track of the laser beam on the third mirror after sequentially passing through the first mirror, the second mirror and the first prism assembly has an interrupted region; an orthographic projection of the wire feed assembly on the third reflector passes through the discontinuity area.
Optionally, in some embodiments of the present application, a movement trajectory of the laser beam on the third mirror has two discontinuous areas, and a distribution direction of the two discontinuous areas is consistent with an axial direction of the wire feeding assembly.
Optionally, in some embodiments of the present application, the first prism assembly includes a first prism, a side of the first prism facing the second mirror forms a first recess in the output direction toward the laser beam, and a side of the first prism facing away from the second mirror forms a first protrusion in the output direction toward the laser beam; the first recess and the first protrusion correspond to the discontinuous region.
Optionally, in some embodiments of the present application, the first prism assembly includes a second prism and a third prism that are sequentially arranged at an interval along the output direction of the laser beam, a side of the second prism facing the third prism forms a second recess along the output direction away from the laser beam, and a side of the third prism facing the second prism forms a second protrusion along the output direction away from the laser beam; the second recess and the second protrusion correspond to the discontinuous region.
Optionally, in some embodiments of the present application, the laser welding apparatus includes a second prism assembly, the second prism assembly is located between the wire feeding assembly and the third reflecting mirror, and a movement track of the laser beam passing through the first prism assembly, the third reflecting mirror and the second prism assembly is annular.
Optionally, in some embodiments of the present application, the second prism assembly includes a fourth prism, a side of the fourth prism facing the wire feed assembly forms a third protrusion in an output direction away from the laser beam, a third recess is formed on one side, facing away from the wire feeding assembly, of the fourth prism along the output direction facing away from the laser beam; the third protrusion and the third recess correspond to the discontinuous region.
Optionally, in some embodiments of the present application, the second prism assembly includes a fifth prism and a sixth prism that are sequentially disposed at an interval along the output direction of the laser beam, a side of the fifth prism facing the sixth prism forms a fourth protrusion along the output direction of the laser beam, and a side of the sixth prism facing the fifth prism forms a fourth recess along the output direction of the laser beam; the fourth protrusion and the fourth recess correspond to the discontinuous region.
Optionally, in some embodiments of the present application, the wire feeding assembly includes a wire feeding tube and a welding wire, the wire feeding tube passes through the first through hole and the second through hole, the welding wire is located in the wire feeding tube, and the welding wire extends out of the wire feeding tube along the output direction of the laser beam; the laser beam is focused to the edge of the welding wire through the focusing lens and moves along the circumferential direction of the welding wire.
Laser welding device in the embodiment of this application includes laser output subassembly, reflector component, focusing lens, send a subassembly and light path adjusting part, laser output subassembly is used for exporting laser beam, reflector component includes the first speculum that sets gradually along laser beam's output light path, second mirror and third speculum, first through-hole has been seted up on the third speculum, focusing lens sets up the reflection light path at the third speculum, the second through-hole has been seted up to the position that corresponds first through-hole on the focusing lens, send a subassembly to pass first through-hole and second through-hole in proper order, light path adjusting part is connected with first speculum and second mirror. This application utilizes light path adjusting part to drive first speculum and the vibration of second speculum through setting up light path adjusting part to make laser beam can follow the circumferential motion of sending a subassembly's output behind speculum subassembly and the focusing lens in proper order, thereby make send a subassembly around laser beam's energy distribution more even, and then make the welding seam shaping more even stable.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a laser welding apparatus provided in an embodiment of the present application;
FIG. 2 is a schematic diagram of a first prism assembly structure and a path of laser light through the prism according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of another first prism assembly structure and the optical path of laser light through the prism according to an embodiment of the present disclosure;
FIG. 4 is a schematic diagram illustrating a movement trajectory of a laser beam before the laser beam passes through a first prism assembly according to an embodiment of the present disclosure;
FIG. 5 is a schematic diagram illustrating a movement path of a laser beam after the laser beam passes through a first prism assembly according to an embodiment of the present disclosure;
FIG. 6 is a schematic diagram illustrating a movement trajectory of a laser beam at a focal point and a position of a welding wire according to an embodiment of the present disclosure;
FIG. 7 is a schematic structural diagram of another laser welding apparatus provided in the embodiments of the present application;
FIG. 8 is a schematic diagram of a second prism assembly according to an embodiment of the present disclosure and a path of laser light through the prism;
FIG. 9 is a schematic diagram of another second prism assembly according to an embodiment of the present application and a path of laser light through the prism;
FIG. 10 is a schematic diagram illustrating a movement trajectory of a laser beam before the laser beam passes through a first prism assembly according to an embodiment of the present disclosure;
FIG. 11 is a schematic diagram showing a movement path of a laser beam after passing through a first prism assembly and before passing through a second prism assembly according to an embodiment of the present disclosure;
FIG. 12 is a schematic view of a movement path of a laser beam after passing through a second prism assembly according to an embodiment of the present disclosure;
FIG. 13 is a schematic diagram of a movement locus of a laser beam at a focal position and a position of a welding wire according to another embodiment of the present disclosure.
Description of the reference numerals:
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. Furthermore, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the present application, are given by way of illustration and explanation only, and are not intended to limit the present application. In the present application, unless indicated to the contrary, the use of the directional terms "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, and more particularly to the orientation of the figures of the drawings; while "inner" and "outer" are with respect to the outline of the device.
The embodiment of the present application provides a laser welding apparatus, which will be described in detail below. It should be noted that the following description of the embodiments is not intended to limit the preferred order of the embodiments.
Fig. 1 is a laser welding apparatus according to an embodiment of the present disclosure, and as shown in fig. 1, the laser welding apparatus 100 includes a laser output assembly 110, and the laser output assembly 110 is configured to output a laser beam. The laser output assembly 110 comprises a laser output fiber 111, a laser output head 112 and a collimating lens 113, wherein the laser output fiber 111 is inserted into the laser output head 112, and laser output by the laser output head 112 is converted into collimated light through the collimating lens 113. The collimating lens 113 can move in the output direction of the laser beam, so that the focal position of the laser beam can be adjusted to meet different use requirements of the laser welding device 100.
The third reflector 123 is provided with a first through hole 1231, and since the direction of the laser beam reflected by the third reflector 123 is the final emitting direction of the laser beam, the third reflector 123 is provided with the first through hole 1231, which is helpful for the subsequent installation of the wire feeding assembly 180, so as to ensure that the wire feeding direction of the laser welding device 100 is coaxial with the emitting direction of the laser beam when in use, thereby achieving the purpose of coaxially feeding the wire when the laser welding device 100 is in use.
The laser welding apparatus 100 includes a focusing lens 170, and the focusing lens 170 is disposed on a reflection light path of the third mirror 123 to focus the laser beam reflected by the mirror assembly 120. The focusing lens 170 is provided with a second through hole 171, and the second through hole 171 corresponds to the first through hole 1231, so as to facilitate the subsequent installation of the wire feeding assembly 180, and achieve the purpose of coaxially feeding the wire when the laser welding device 100 is used.
The laser welding device 100 includes a wire feeding assembly 180, the wire feeding assembly 180 sequentially passes through the first through hole 1231 and the second through hole 171, and an output end of the wire feeding assembly 180 is located at a side of the focusing lens 170 away from the third reflecting mirror 123, so that a focal point of the laser beam can be located at the output end of the wire feeding assembly 180 after the laser beam is focused by the focusing lens 170.
The wire feeding assembly 180 can move in the first through hole 1231 and the second through hole 171 along the emitting direction of the laser beam, so as to adjust the position of the output end of the wire feeding assembly 180, and adapt to the focal position of the laser beam focused by the focusing lens 170, thereby ensuring the smooth proceeding of the welding process.
The laser welding device 100 includes a light path adjusting assembly 160, the light path adjusting assembly 160 is connected to the first reflector 121 and the second reflector 122, and the light path adjusting assembly 160 is configured to drive the first reflector 121 and the second reflector 122 to vibrate, so that the laser beam sequentially passes through the reflector assembly 120 and the focusing lens 170 and then moves along the circumferential direction of the output end of the wire feeding assembly 180.
Wherein, when the light path adjusting assembly 160 drives the first reflector 121 and the second reflector 122 to vibrate, the vibration frequency and the vibration angle of the first reflector 121 and the second reflector 122 can be adjusted by adjusting the vibration frequency and the vibration angle of the light path adjusting assembly 160, thereby the shape and the size of the movement track of the laser beam reflected by the first reflector 121 and the second reflector 122 can be adjusted, and the movement speed of the laser beam, and further the movement track of the laser beam reflected by the third reflector 123 and focused by the focusing lens 170 can be adjusted, so that the laser beam finally moves along the circumferential direction of the output end of the wire feeding assembly 180, thereby the energy distribution of the laser beam around the wire feeding assembly 180 is more uniform, and the uniformity of welding seam formation is improved.
In the embodiment of the present application, the laser welding apparatus 100 includes a laser output assembly 110, a mirror assembly 120, a focusing lens 170, a wire feeding assembly 180 and a light path adjusting assembly 160, the laser output assembly 110 is configured to output a laser beam, the mirror assembly 120 includes a first mirror 121, a second mirror 122 and a third mirror 123 that are sequentially disposed along an output light path of the laser beam, a first through hole 1231 is disposed on the third mirror 123, the focusing lens 170 is disposed on a reflection light path of the third mirror 123, a second through hole 171 is disposed on the focusing lens 170 corresponding to the first through hole 1231, the wire feeding assembly 180 sequentially passes through the first through hole 1231 and the second through hole 171, and the light path adjusting assembly 160 is connected to the first mirror 121 and the second mirror 122. This application is through setting up light path adjusting part 160, utilizes light path adjusting part 160 to drive first speculum 121 and the vibration of second speculum 122 to make laser beam can follow the circumferential motion of sending the output of silk subassembly 180 behind reflector assembly 120 and focusing lens 170 in proper order, thereby make send silk subassembly 180 around laser beam's energy distribution more even, and then make the welding seam shaping more even stable.
Optionally, the optical path adjusting assembly 160 includes a first vibration motor 161 and a second vibration motor 162, the first vibration motor 161 is connected to the first reflecting mirror 121, and the first vibration motor 161 is configured to drive the first reflecting mirror 121 to vibrate, so as to adjust a motion trajectory of the laser beam reflected by the first reflecting mirror 121; the second vibration motor 162 is connected to the second reflector 122, and the second vibration motor 162 is used for driving the second reflector 122 to vibrate so as to adjust the movement track of the laser beam reflected by the second reflector 122.
The vibration modes of the first reflecting mirror 121 and the second reflecting mirror 122 are separately controlled by the first vibration motor 161 and the second vibration motor 162, and in the use process of the laser welding device 100, the target movement track of the laser beam is determined based on the structure of the weld joint, and then the vibration modes of the first vibration motor 161 and the second vibration motor 162 are programmed according to the target movement track of the laser beam, so as to meet the welding requirements of different weld joint structures, so that the adjustable range of the welding process of the laser welding device 100 is large, and the applicability of the laser welding device 100 is improved.
It should be noted that, by the cooperation of the first vibration motor 161 and the second vibration motor 162, the first reflecting mirror 121 and the second reflecting mirror 122 are controlled to vibrate in a matching manner, so that the movement locus of the laser beam can be a circular ring, an elliptical ring, a square ring, or a polygonal ring, and the specific shape of the movement locus can correspondingly adjust the vibration frequency and the vibration speed of the first vibration motor 161 and the second vibration motor 162 according to the actual welding requirement, which is not limited herein.
Optionally, the laser welding apparatus 100 includes a first prism assembly 130, the first prism assembly 130 is located between the second mirror 122 and the wire feeding assembly 180, and the movement track of the laser beam on the third mirror 123 after passing through the first mirror 121, the second mirror 122 and the first prism assembly 130 in sequence has an interrupted area 150.
Because the wire feeding assembly 180 is inserted on the third reflector 123 and the focusing lens 170, and the wire feeding assembly 180 is coaxially arranged with the emitting direction of the laser beam, when the laser beam is reflected by the first reflector 121 and the second reflector 122 and forms a movement track on the third reflector 123, the laser beam may hit the wire feeding assembly 180 during the movement process, which may damage the wire feeding assembly 180 and even affect the normal use of the wire feeding assembly 180.
As shown in fig. 4 and 5, the embodiment of the present application changes the transmission path of the laser beam by the first prism assembly 130 between the second mirror 122 and the wire feeding assembly 180, so that the movement track of the laser beam before passing through the first prism assembly 130 is a complete circular ring, and the movement track after passing through the first prism assembly 130 has an interrupted area 150, i.e., two broken semicircular rings. Wherein, send an orthographic projection of silk subassembly 180 on third speculum 123 to pass interrupted area 150, that is to say, laser beam is at the in-process of motion, and the position that interrupted area 150 appears in the motion track is for sending the position that silk subassembly 180 corresponds the place to can avoid laser beam directly to hit on sending silk subassembly 180, and then avoid sending silk subassembly 180 to take place the damage, improve the life who sends silk subassembly 180.
In some embodiments, as shown in fig. 5, the trajectory of the laser beam on the third mirror 123 has two intermittent areas 150, and the two intermittent areas 150 are distributed in the same direction as the axial direction of the wire feed assembly 180. That is, the first prism assembly 130 is arranged such that the laser beam moves to the area where the wire feeding assembly 180 is located, and the arrangement mode enables the laser beam to avoid the area where the wire feeding assembly 180 is located no matter how the movement track of the laser beam is adjusted, thereby ensuring that the wire feeding assembly 180 is not damaged by the laser beam.
Specifically, as shown in fig. 2, the first prism assembly 130 includes a first prism 131, a first recess 1311 is formed in a direction toward the output direction of the laser beam on a side of the first prism 131 facing the second mirror 122, a first protrusion 1312 is formed in a direction toward the output direction of the laser beam on a side of the first prism 131 facing away from the second mirror 122, that is, a concave edge is formed on a side of the first prism 131 facing the second mirror 122, a convex is formed on a side of the first prism 131 facing away from the second mirror 122, the concave edge corresponds to the convex edge, and the first recess 1311 and the first protrusion 1312 correspond to the intermittent region 150.
When the laser beam is irradiated to the first recess 1311 on the side of the first prism 131 facing the second mirror 122, the laser beam is split into two beams in the first prism 131 by taking the first recess 1311 as the center according to the optical path transmission principle, so that a discontinuity is formed at a position corresponding to the first recess 1311; when the laser beam continues to be transmitted to the first protrusion 1312 on the side of the first prism 131 away from the second reflector 122, the laser beam becomes parallel light in the same incident direction when being emitted from the first prism 131 due to the same inclination degree of the opposite sides of the first prism 131, and a discontinuity is formed at a position corresponding to the first protrusion 1312, and thus the movement track on the third reflector 123 forms a discontinuity area 150.
It should be noted that when the laser beam is transmitted from the side of the first prism 131 facing the second mirror 122 to the side of the first prism 131 away from the second mirror 122, the inclination angle of the two sides of the first prism 131 directly affects the transmission angle of the laser beam in the first prism 131, and further affects the size of the discontinuity formed when the laser beam is output from the first prism 131; meanwhile, the thickness of the first prism 131 directly affects the transmission distance of the laser beam in the first prism 131, and the larger the transmission distance is, the larger the size of the discontinuity formed when the laser beam is output from the first prism 131 is, in the case of the same transmission angle. Therefore, during the use of the laser welding apparatus 100, the thickness of the first prism 131 and the inclination angles of the two sides can be adjusted based on the size of the wire feeding assembly 180, so as to adjust the size of the discontinuous region 150 of the movement track formed by the laser beam on the third reflector 123, so as to ensure that the wire feeding assembly 180 is not damaged by the laser beam directly striking the wire feeding assembly 180 during the movement of the laser beam, and reduce the loss of the laser beam during the movement of the laser beam.
In still other embodiments, as shown in fig. 3, the first prism assembly 130 includes a second prism 132 and a third prism 133 that are sequentially spaced apart along the output direction of the laser beam, a second recess 1321 is formed along the output direction away from the laser beam on a side of the second prism 132 facing the third prism 133, a second protrusion 1331 is formed along the output direction away from the laser beam on a side of the third prism 133 facing the second prism 132, that is, a concave edge is formed on a side of the second prism 132 facing the third prism 133, a convex edge is formed on a side of the third prism 133 facing the second prism 132, the concave edge corresponds to the convex edge, and the second recess 1321 and the second protrusion 1331 correspond to the interrupted region 150.
When the laser beam passes through the second prism 132 and is output from the side of the second prism 132 facing the third prism 133, according to the principle of optical path transmission, the laser beam will be split into two beams with the second recess 1321 as the center after passing through the second prism 132, so as to form a discontinuity at the position corresponding to the second recess 1321; when the laser beam continues to be transmitted to the second protrusion 1331 on the side of the third prism 133 facing the second prism 132, since the inclination degree of the opposite side surfaces of the second prism 132 and the third prism 133 is the same, the laser beam becomes parallel light which is the same as the direction of the laser beam when the laser beam is incident to the second prism 132 when the laser beam is incident to the third prism 133, and a discontinuity is formed at a position corresponding to the second protrusion 1331, and thus the movement trace on the third reflecting mirror 123 forms the discontinuity area 150.
It should be noted that a side of the second prism 132 away from the third prism 133 and a side of the third prism 133 away from the second prism 132 are both flat surfaces and are perpendicular to the incident and emitting directions of the laser beam, that is, when the laser beam is incident on the second prism 132 and emitted from the third prism 133, the transmission direction of the laser beam is not changed, that is, the optical path of the laser beam is mainly changed in the region between the second prism 132 and the third prism 133.
Further, when the laser beam is transmitted from the side of the second prism 132 facing the third prism 133 to the side of the third prism 133 facing the second prism 132, the inclination angle of the side of the second prism 132 opposite to the third prism 133 directly affects the transmission angle of the laser beam between the second prism 132 and the third prism 133, thereby affecting the size of the discontinuity formed when the laser beam is output from the third prism 133; meanwhile, the distance between the second prism 132 and the third prism 133 directly affects the transmission distance of the laser beam between the second prism 132 and the third prism 133, and the larger the transmission distance is, the larger the size of the discontinuity formed when the laser beam is output from the third prism 133 is, in the case of the same transmission angle.
Therefore, during the use of the laser welding apparatus 100, the distance between the second prism 132 and the third prism 133 and the inclination angle of the opposite side surfaces of the second prism 132 and the third prism 133 can be adjusted based on the size of the wire feeding assembly 180, so as to adjust the size of the discontinuous region 150 of the movement track formed by the laser beam on the third reflector 123, so as to ensure that the wire feeding assembly 180 is not damaged by the laser beam directly hitting the wire feeding assembly 180 during the movement process, and reduce the loss of the laser beam during the movement process.
Optionally, as shown in fig. 7, the laser welding apparatus 100 includes a second prism assembly 140, the second prism assembly 140 is located between the wire feeding assembly 180 and the third reflecting mirror 123, and a movement track of the laser beam after passing through the first prism assembly 130, the third reflecting mirror 123 and the second prism assembly 140 is annular.
Since the movement track formed by the laser beam on the third reflector 123 has the discontinuous region 150, after the laser beam is reflected by the third reflector 123 and focused by the focusing lens 170, the laser beam also has a discontinuity when moving along the circumferential direction of the wire feeding assembly 180, thereby affecting the uniformity of the energy distribution of the laser beam around the wire feeding assembly 180 to a certain extent.
It should be noted that, as shown in fig. 7, since the wire feeding assembly 180 is inserted into the third reflecting mirror 123, when the laser beam forms a movement track on the third reflecting mirror 123, only the laser beam moving to the lower side of the first through hole 1231 on the third reflecting mirror 123 will strike the wire feeding assembly 180, when the first prism assembly 130 is arranged to form the discontinuous area 150, only one discontinuous area 150 can be formed below the first through hole 1231, that is, the laser beam on the whole movement track will not pass through the first prism assembly 130, and this arrangement can not only ensure the integrity of the movement track of the laser beam to the maximum extent, but also prevent the wire feeding assembly 180 from being damaged by the laser beam.
As shown in fig. 10 to 12, in the embodiment of the present application, the second prism assembly 140 is disposed between the wire feeding assembly 180 and the third reflecting mirror 123, and the transmission path of the laser beam is changed by using the second prism assembly 140, such that the movement track of the laser beam before passing through the first prism assembly 130 is a complete circular ring, the movement track after passing through the first prism assembly 130 and before passing through the second prism assembly 140 has a discontinuous region 150, and the movement track after passing through the second prism assembly 140 is transformed into a complete circular ring, such that the movement track of the laser beam during the circumferential movement of the laser beam along the wire feeding assembly 180 is a complete circular ring after the laser beam is reflected by the third reflecting mirror 123 and focused by the focusing lens 170, thereby ensuring the uniformity of the energy distribution of the laser beam around the wire feeding assembly 180.
Specifically, as shown in fig. 8, the second prism assembly 140 includes a fourth prism 141, a third protrusion 1412 is formed on a side of the fourth prism 141 facing the wire feeding assembly 180 along the output direction away from the laser beam, and a third recess 1411 is formed on a side of the fourth prism 141 facing away from the wire feeding assembly 180 along the output direction away from the laser beam, that is, a rib is formed on a side of the fourth prism 141 facing the wire feeding assembly 180, a concave ridge is formed on a side of the fourth prism 141 facing away from the wire feeding assembly 180, the concave ridge corresponds to the rib, and the third protrusion 1412 and the third recess 1411 correspond to the interrupted region 150.
When the laser beam irradiates to two sides of the third protrusion 1412 on one side of the fourth prism 141 facing the wire feeding assembly 180, the laser beam is folded to a beam toward the center of the third protrusion 1412 in the fourth prism 141 according to the optical path transmission principle, so that the discontinuity formed at the position corresponding to the third protrusion 1412 is eliminated; when the laser beam continues to be transmitted to the third recess 1411 on the side of the fourth prism 141 away from the wire feeding assembly 180, because the inclination degrees of the two opposite sides of the fourth prism 141 are consistent, the laser beam emitted from the fourth prism 141 becomes parallel light with the same incident direction, and the discontinuity of the laser beam at the corresponding position of the third recess 1411 is eliminated, so that the movement track on the circumferential direction of the wire feeding assembly 180 is a complete circular ring.
It should be noted that, since the size of the discontinuous region 150 is directly related to the thickness of the first prism 131 and the inclination angles of the two opposite side surfaces of the first prism 131, when the structure of the fourth prism 141 is designed, the thickness of the fourth prism 141 and the inclination angles of the two opposite side surfaces of the fourth prism 141 can be kept consistent with the first prism 131, so as to help eliminate the discontinuous region 150 and simultaneously not affect the energy distribution of the laser beam, thereby ensuring the uniformity of the energy distribution of the laser beam around the wire feeding assembly 180.
In some embodiments, as shown in fig. 9, the second prism assembly 140 includes a fifth prism 142 and a sixth prism 143 that are sequentially spaced apart in the output direction of the laser beam, a side of the fifth prism 142 facing the sixth prism 143 forms a fourth protrusion 1421 in the output direction of the laser beam, a side of the sixth prism 143 facing the fifth prism 142 forms a fourth recess 1431 in the output direction of the laser beam, that is, a side of the fifth prism 142 facing the sixth prism 143 has a convex rib, a side of the sixth prism 143 facing the fifth prism 142 has a concave rib corresponding to the convex rib, and the fourth protrusion 1421 and the fourth recess 1431 correspond to the interrupted region 150.
When the laser beam passes through the fifth prism 142 and is output from the side of the fifth prism 142 facing the sixth prism 143, according to the principle of optical path transmission, the laser beam after passing through the fifth prism 142 is folded to a beam toward the center of the fourth protrusion 1421, so as to eliminate a discontinuity formed at a position corresponding to the fourth protrusion 1421; when the laser beam continues to be transmitted to the fourth recess 1431 on the side of the sixth prism 143 facing the fifth prism 142, because the inclination degree of the opposite side surfaces of the fifth prism 142 and the sixth prism 143 is consistent, the laser beam after entering the sixth prism 143 becomes parallel light which is consistent with the direction of the laser beam when entering the fifth prism 142, and the discontinuity of the laser beam at the corresponding position of the fourth recess 1431 is eliminated, so that the movement track on the circumferential direction of the wire feeding assembly 180 is a complete circular ring.
It should be noted that, a side of the fifth prism 142 away from the sixth prism 143 and a side of the sixth prism 143 away from the fifth prism 142 are both flat surfaces and are perpendicular to the incident and emitting directions of the laser beam, that is, the transmission direction of the laser beam does not change when the laser beam is incident on the fifth prism 142 and emitted from the sixth prism 143, that is, the optical path of the laser beam changes mainly in the region between the fifth prism 142 and the sixth prism 143.
In addition, since the size of the interrupted region 150 is directly related to the distance between the second prism 132 and the third prism 133 and the inclination angle of the opposite side surfaces of the second prism 132 and the third prism 133, when the structures of the fifth prism 142 and the sixth prism 143 are designed, the distance between the fifth prism 142 and the sixth prism 143 and the inclination angle of the opposite side surfaces of the fifth prism 142 and the sixth prism 143 can be consistent with the relationship between the first prism 131 and the second prism 132, thereby helping to eliminate the interrupted region 150 without affecting the energy distribution of the laser beam and further ensuring the uniformity of the energy distribution of the laser beam around the wire feeding assembly 180.
It should be noted that, the specific structures of the first prism assembly 130 and the second prism assembly 140 can be combined correspondingly according to actual situations, and it is only necessary to ensure that the first prism assembly 130 and the second prism assembly 140 are matched with each other to prevent the laser beam from directly striking the wire feeding assembly 180, and at the same time, it is also possible to ensure the uniformity of the energy distribution of the laser beam around the wire feeding assembly 180, and no special limitation is imposed here.
Optionally, the wire feeding assembly 180 includes a wire feeding tube 181 and a welding wire 182, the wire feeding tube 181 passes through the first through hole 1231 and the second through hole 171, the welding wire 182 is located in the wire feeding tube 181, the welding wire 182 extends out of the wire feeding tube 181 along the output direction of the laser beam, and the laser beam is focused to the edge of the welding wire 182 by the focusing lens 170 and moves along the circumferential direction of the welding wire 182. The positions of the wire feeding pipe 181 in the first through hole 1231 and the second through hole 171 and the position of the welding wire 182 in the wire feeding pipe 181 can be moved along the output direction of the laser beam, the laser beam can be focused around the end face of the welding wire 182 by adjusting the alignment of the straight mirror 113, the wire feeding pipe 181 and the position of the welding wire 182, and the welding wire 182 is melted and filled into the weld joint under the action of the laser beam, so that the welding of the laser welding device 100 to the workpiece to be welded can be realized.
As shown in fig. 6 and 13, after being focused by the focusing lens 170, the laser beam can move along the circumferential direction of the welding wire 182, so that the welding pool can be continuously stirred by the laser beam in the moving process, the generation of internal bubbles when the welding wire 182 is melted and re-solidified is reduced, and the forming of the welding seam is more uniform and stable.
The foregoing detailed description is directed to a laser welding apparatus provided in the embodiments of the present application, and the principles and embodiments of the present application are described herein by using specific examples, which are merely used to help understand the method and the core concept of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. A laser welding apparatus, comprising:
the laser output assembly is used for emitting laser beams;
the reflecting mirror assembly comprises a first reflecting mirror, a second reflecting mirror and a third reflecting mirror which are sequentially arranged along the output optical path of the laser beam; a first through hole is formed in the third reflector;
the focusing lens is arranged on a reflection light path of the third reflector; a second through hole is formed in the focusing lens at a position corresponding to the first through hole;
the wire feeding assembly sequentially penetrates through the first through hole and the second through hole, and the output end of the wire feeding assembly is positioned on one side, away from the third reflector, of the focusing lens;
the light path adjusting component is used for driving the first reflector and the second reflector to vibrate so that the laser beam sequentially passes through the reflector component and the rear edge of the focusing lens to move circumferentially at the output end of the wire feeding component.
2. The laser welding apparatus according to claim 1, wherein the optical path adjusting member includes a first vibration motor and a second vibration motor; the first vibration motor is connected with the first reflector and used for driving the first reflector to vibrate so as to adjust the motion track of the laser beam reflected by the first reflector; the second vibration motor is connected with the second reflector and used for driving the second reflector to vibrate so as to adjust the movement track of the laser beam reflected by the second reflector.
3. The laser welding apparatus of claim 1, wherein the laser welding apparatus comprises a first prism assembly located between the second mirror and the wire feed assembly, and wherein the laser beam has an interrupted area on the third mirror after passing through the first mirror, the second mirror, and the first prism assembly in sequence; an orthographic projection of the wire feed assembly on the third reflector passes through the discontinuity area.
4. The laser welding device of claim 3, wherein the trajectory of the laser beam on the third mirror has two interrupted areas, and the two interrupted areas are distributed in the same direction as the axial direction of the wire feeding assembly.
5. The laser welding apparatus according to claim 3, wherein the first prism assembly includes a first prism, a side of the first prism facing the second mirror forms a first recess in the output direction toward the laser beam, and a side of the first prism facing away from the second mirror forms a first projection in the output direction toward the laser beam; the first recess and the first protrusion correspond to the discontinuous region.
6. The laser welding apparatus according to claim 3, wherein the first prism assembly includes a second prism and a third prism which are arranged at intervals in this order in the output direction of the laser beam, a side of the second prism facing the third prism forms a second recess in the output direction away from the laser beam, and a side of the third prism facing the second prism forms a second projection in the output direction away from the laser beam; the second recess and the second protrusion correspond to the discontinuous region.
7. The laser welding apparatus of claim 3, comprising a second prism assembly located between the wire feed assembly and the third mirror, wherein a movement path of the laser beam after passing through the first prism assembly, the third mirror and the second prism assembly is circular.
8. The laser welding apparatus of claim 7, wherein the second prism assembly comprises a fourth prism, a side of the fourth prism facing the wire feed assembly forms a third protrusion in the output direction away from the laser beam, and a side of the fourth prism facing away from the wire feed assembly forms a third depression in the output direction away from the laser beam; the third protrusion and the third recess correspond to the discontinuous region.
9. The laser welding apparatus according to claim 7, wherein the second prism assembly includes a fifth prism and a sixth prism that are arranged at an interval in sequence along the output direction of the laser beam, a side of the fifth prism facing the sixth prism forms a fourth protrusion along the output direction toward the laser beam, and a side of the sixth prism facing the fifth prism forms a fourth recess along the output direction toward the laser beam; the fourth protrusion and the fourth recess correspond to the discontinuous region.
10. The laser welding apparatus according to any one of claims 1 to 9, wherein the wire feed assembly includes a wire feed pipe and a welding wire, the wire feed pipe passing through the first through hole and the second through hole, the welding wire being located in the wire feed pipe, the welding wire protruding from the wire feed pipe in an output direction of the laser beam; the laser beam is focused to the edge of the welding wire through the focusing lens and moves along the circumferential direction of the welding wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211673247.0A CN115815806A (en) | 2022-12-26 | 2022-12-26 | Laser welding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211673247.0A CN115815806A (en) | 2022-12-26 | 2022-12-26 | Laser welding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115815806A true CN115815806A (en) | 2023-03-21 |
Family
ID=85518260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211673247.0A Pending CN115815806A (en) | 2022-12-26 | 2022-12-26 | Laser welding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115815806A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116871680A (en) * | 2023-08-18 | 2023-10-13 | 广东海洋大学 | Laser light path system for welding dissimilar materials |
-
2022
- 2022-12-26 CN CN202211673247.0A patent/CN115815806A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116871680A (en) * | 2023-08-18 | 2023-10-13 | 广东海洋大学 | Laser light path system for welding dissimilar materials |
| CN116871680B (en) * | 2023-08-18 | 2024-02-20 | 广东海洋大学 | Laser light path system for welding dissimilar materials |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11673212B2 (en) | Optical path/beam splitting unit and coaxial-wire-feed cladding head thereof | |
| CN105772939A (en) | Laser double-beam welding device and method | |
| CN103399405A (en) | Laser broadband cladding device and method | |
| CN113005445B (en) | Device for performing cladding on different hollow or solid light spots by deflecting focal light path and using method | |
| EP3395490B1 (en) | Laser welding method and laser welding apparatus | |
| CN110977152A (en) | SLM double-laser combined machining system | |
| CN115815806A (en) | Laser welding device | |
| JP4378634B2 (en) | Butt laser welding method and butt laser welding apparatus | |
| JP7369915B2 (en) | Laser welding device and laser welding method using the same | |
| CN113634769A (en) | Metal SLM printing system based on Gaussian beam and beam shaping composite beam | |
| WO2020241138A1 (en) | Laser machining device and laser machining method using same | |
| CN110977159A (en) | Laser light path component for forming annular light spots | |
| CN112548324A (en) | Laser welding method and apparatus for laser welding | |
| US8138447B2 (en) | Laser-arc hybrid welding head | |
| CN219026305U (en) | Laser welding device | |
| CN114012248B (en) | Optical path system of laser cutting head | |
| CN216966642U (en) | Coaxial welding light path structure | |
| JP5050232B2 (en) | Laser welding head | |
| CN113977078B (en) | Handheld laser welding device and method for cooperatively controlling laser position and power | |
| CN111230303B (en) | Laser-electric arc composite coaxial fuse device | |
| US20220072655A1 (en) | Laser processing device and laser processing method using same | |
| JP2019005802A (en) | Laser processing method, laser processing device and laser emission unit | |
| CN210848798U (en) | Composite laser welding head | |
| CN207908782U (en) | A kind of laser welding lens construction and laser welding apparatus | |
| JP2000005888A (en) | Laser butt welding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |