Laser head

Abstract

The utility model discloses a laser head. The laser head comprises a first laser assembly, the first laser assembly is connected with a first optical fiber, and first laser in the first optical fiber is output as a first light beam after passing through the first laser assembly; the second laser assembly is connected with a second optical fiber, and the second laser assembly is used for configuring second laser in the second optical fiber into a second light beam with the cross section of a hollow structure; the first mounting base can be connected with the first laser assembly and the second laser assembly, the first mounting base comprises a first reflection assembly and an emergent lens barrel, and the first reflection assembly can reflect at least one of the first light beam and the second light beam, so that the first light beam and the second light beam are jointly emitted to a to-be-welded surface through the emergent lens barrel; the first light beam forms a first light spot on the to-be-welded surface, and the second light beam forms a second light spot in a closed pattern surrounding the first light spot on the to-be-welded surface. The laser head can improve the laser welding quality.

Description

Technical Field

[0001] The utility model relates to the field of laser welding, in particular to a laser head. Background Art

[0002] The welding demand for through-hole technology (THT) is developing rapidly, especially with the large-scale application of high-power electronic devices such as insulated-gate bipolar transistors (IGBT), which puts higher requirements on the welding process of THT.

[0003] The main problems with the laser welding technology currently used in THT are: on the one hand, the laser can easily penetrate the welding hole and ablate the substrate below the welding hole; on the other hand, it is difficult for the solder to penetrate the welding hole, resulting in low welding quality. Utility Model Content

[0004] The utility model provides a laser head, which can improve the quality of laser welding.

[0005] The utility model provides a laser head for universal plug-in technology welding, the laser head comprising: a first laser component, the first laser component is connected to a first optical fiber, the first laser in the first optical fiber is output as a first light beam after passing through the first laser component; a second laser component, the second laser component is connected to a second optical fiber, the second laser component is used to configure the second laser in the second optical fiber as a second light beam with a hollow cross-section; and a first mounting seat, capable of connecting the first laser component and the second laser component, the first mounting seat comprising a first reflecting component and an exit lens barrel, the first reflecting component can reflect at least one of the first light beam and the second light beam, so that the first light beam and the second light beam are emitted together to a surface to be welded via the exit lens barrel, wherein the first light beam forms a first light spot on the surface to be welded, and the second light beam forms a second light spot on the surface to be welded in a closed pattern surrounding the first light spot.

[0006] According to the aforementioned implementation of the present utility model, the first light spot is a point-shaped light spot; and the second light spot is a circular ring-shaped light spot arranged concentrically with the first light spot.

[0007] According to any of the aforementioned embodiments of the utility model, the first laser assembly includes: a first lens barrel, one end of which is connected to the first optical fiber, and the other end is connected to the first mounting seat; a first collimator lens, which is installed in the first lens barrel; a first plane adjustment member, which movably connects the first collimator lens to the first lens barrel, and the first plane adjustment member is used to adjust the position of the first collimator lens relative to the first lens barrel, so as to adjust the position of the first light spot on the surface to be welded.

[0008] According to any of the aforementioned embodiments of the utility model, the first laser assembly further includes: a first axial adjustment member, movably connecting the first optical fiber with the first lens barrel, and the first axial adjustment member can drive the first optical fiber to move relative to the first lens barrel along the axial direction of the first lens barrel.

[0009] According to any of the aforementioned embodiments of the utility model, the second laser assembly includes: a second lens barrel, one end of which is connected to the second optical fiber, and the other end is connected to the first mounting seat; a hole-band member, the hole-band member having a through hole that penetrates the second lens barrel along the axial direction; a second collimator lens, which is installed in the second lens barrel, and the second laser in the second optical fiber passes through the hole-band member and the second collimator lens in sequence.

[0010] According to any of the aforementioned embodiments of the utility model, the second laser assembly further includes: a conical mirror; a second plane adjustment member, movably connecting the conical mirror with the second lens barrel, and the second plane adjustment member is used to adjust the position of the conical mirror relative to the second lens barrel to adjust the position of the second light spot on the surface to be welded.

[0011] According to any of the aforementioned embodiments of the utility model, the second laser assembly also includes: a second axial adjustment member, which movably connects the perforated member with the second lens barrel, and the second axial adjustment member can drive the perforated member to move relative to the second lens barrel along the axial direction of the second lens barrel to adjust the size of the inner contour of the second light spot; a third axial adjustment member, which movably connects the second collimator with the second lens barrel, and the third axial adjustment member can drive the second collimator to move relative to the second lens barrel along the axial direction of the second lens barrel to adjust the size of the outer contour of the second light spot.

[0012] According to any of the aforementioned embodiments of the utility model, the laser head also includes: a detection component, which is detachably connected to the first mounting seat, and the detection component includes an image acquisition component, a temperature detection component and a second mounting seat, and the image acquisition component and the temperature detection component are arranged in parallel on the second mounting seat.

[0013] According to any of the foregoing embodiments of the utility model, the detection component has a first installation state and a second installation state. In the first installation state, the temperature detection component is coaxially arranged with the exit lens barrel, and the image acquisition component, the temperature detection component, the first laser component, and the second laser component are arranged in sequence along a preset direction; in the second installation state, the temperature detection component is coaxially arranged with the exit lens barrel, the temperature detection component, the first laser component, and the second laser component are arranged in sequence along a first direction, and the image acquisition component and the temperature detection component are arranged in sequence along a second direction, and the second direction intersects with the first direction.

[0014] According to any of the foregoing embodiments of the present utility model, the second mounting seat includes a second reflection component, a first connecting member and a second connecting member, the image acquisition component includes a third lens barrel and an image acquisition device, the image acquisition device is located at one end of the third lens barrel, and the other end of the third lens barrel is mounted on the second mounting seat through the first connecting member, the light at the surface to be welded enters the image acquisition device via the exit lens barrel, the second reflection component and the third lens barrel in sequence, and the temperature detection component is mounted on the second mounting seat through the second connecting member.

[0015] According to the laser head of the embodiment of the utility model, it includes a first laser component, a second laser component and a first mounting seat. The first laser component is connected to the first optical fiber and outputs a first light beam, and the second laser component is connected to the second optical fiber and outputs a second light beam with a hollow cross-section. The first mounting seat includes a first reflection component, which can reflect at least one of the first light beam and the second light beam, so that the first light beam and the second light beam are emitted to the surface to be welded through the output lens barrel. When the laser head is applied to the universal plug-in technology welding process, the first light beam forms a first light spot on the surface to be welded, and the first light spot can preheat the pin to be welded to ensure that the pin temperature is high during welding, so as to facilitate the solder to pass through the welding hole. The second light beam forms a second light spot on the surface to be welded in a closed pattern surrounding the first light spot. Since the second light spot is in a surrounding shape, the second light beam is prevented from directly passing through the welding hole to ablate the substrate below the welding hole. The second light spot can melt the corresponding solder to ensure better welding quality after the welding is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0017] Figure 1 It is a front view schematic diagram of an embodiment of the laser head of the utility model;

[0018] Figure 2 It is a top view schematic diagram of an embodiment of the laser head of the utility model;

[0019] Figure 3 It is a side view schematic diagram of an embodiment of the laser head of the utility model;

[0020] Figure 4 for Figure 3 Schematic diagram of the cross section along the AA direction;

[0021] Figure 5 This is a front exploded schematic diagram of an embodiment of a laser head of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of a light spot formed on a surface to be welded by an embodiment of a laser head of the utility model;

[0023] Figure 7 It is a front view schematic diagram of an embodiment of the laser head of the utility model when the detection component is in a second installation state;

[0024] Figure 8 It is a top view schematic diagram of an embodiment of a laser head of the utility model when the detection component is in a second installation state.

[0025] Description of reference numerals:

[0026] First laser assembly 100; first lens barrel 110; first collimator lens 120; first plane adjustment member 130; first axial adjustment member 140; first protective cover 150; first adjustment knob K1; second adjustment knob K2; third adjustment knob K3; first flange F1;

[0027] The second laser assembly 200; the second lens barrel 210; the hole piece 220; the second collimator 230; the cone 240; the second plane adjustment piece 250; the second axial adjustment piece 260; the third axial adjustment piece 270; the optical fiber fixing seat 280; the second protective cover 290; the fourth adjustment knob K4; the fifth adjustment knob K5; the sixth adjustment knob K6; the seventh adjustment knob K7; the second flange F2;

[0028] First mounting seat 300; first reflection assembly 310; first reflection member 311; second reflection member 312; third reflection member 313; output lens barrel 320;

[0029] Detection assembly 400; image acquisition assembly 410; third lens barrel 411; image acquisition device 412; temperature detection assembly 420; second mounting seat 430; second reflection assembly 431; fourth reflection member 4311; fifth reflection member 4312; first connecting member 432; second connecting member 433; third collimator 434; fourth collimator 435;

[0030] A first optical fiber OF1; a second optical fiber OF2;

[0031] The first light spot SP1; the second light spot SP2.

[0032] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with the embodiments with reference to the accompanying drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0035] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0036] The embodiment of the utility model provides a laser head. Figure 1 , Figure 2 , Figure 3 They are respectively a front view schematic diagram, a top view schematic diagram, and a side view schematic diagram of an embodiment of a laser head of the utility model, Figure 4 for Figure 3 Schematic diagram of the cross section along the AA direction. Figure 5This is a front exploded schematic diagram of an embodiment of a laser head of the utility model.

[0037] The laser head is used for through-hole technology (THT) welding. The laser head includes a first laser assembly 100, a second laser assembly 200, and a first mounting seat 300. The first laser assembly 100 is connected to the first optical fiber OF1. The first laser in the first optical fiber OF1 is output as a first light beam after passing through the first laser assembly 100. The second laser assembly 200 is connected to the second optical fiber OF2. The second laser assembly 200 is used to configure the second laser in the second optical fiber OF2 as a second light beam with a hollow cross-section.

[0038] The first mounting base 300 can connect the first laser assembly 100 and the second laser assembly 200. The first mounting base 300 includes a first reflection assembly 310 and an emission lens barrel 320. The first reflection assembly 310 can reflect at least one of the first light beam and the second light beam, so that the first light beam and the second light beam are emitted to the surface to be welded through the emission lens barrel 320.

[0039] Figure 6 The schematic diagram of the structure of the light spot formed on the surface to be welded by the laser head of the utility model is shown in FIG.

[0040] According to the laser head of the embodiment of the utility model, it includes a first laser component 100, a second laser component 200 and a first mounting seat 300. The first laser component 100 is connected to the first optical fiber OF1 and outputs a first light beam, and the second laser component 200 is connected to the second optical fiber OF2 and outputs a second light beam with a hollow cross-section. The first mounting seat 300 includes a first reflection component 310, and the first reflection component 310 can reflect at least one of the first light beam and the second light beam, so that the first light beam and the second light beam are emitted to the surface to be welded through the output lens barrel 320. When the laser head is applied to the universal plug-in technology welding process, the first light beam forms a first light spot SP1 on the surface to be welded. The first light spot SP1 can preheat the pin to be welded to ensure that the pin temperature is high during welding, thereby facilitating the solder to pass through the welding hole. The second light beam forms a second light spot SP2 on the surface to be welded in a closed pattern surrounding the first light spot SP1. Since the second light spot SP2 is in a surrounding shape, it prevents the second light beam from directly passing through the welding hole to ablate the substrate below the welding hole. The second light spot SP2 can melt the corresponding solder, thereby ensuring better welding quality after welding is completed.

[0041] In some embodiments, the first reflective assembly 310 includes a first reflective member 311, a second reflective member 312, and a third reflective member 313. The first reflective member 311, the second reflective member 312, and the third reflective member 313 are arranged in sequence and parallel to each other. The first reflective member 311 corresponds to the output lens barrel 320 and is arranged at an angle of 45° relative to the axial direction of the output lens barrel 320. The second reflective member 312 corresponds to the first laser assembly 100 and is arranged at an angle of 45° relative to the axial direction of the first laser assembly 100. The third reflective member 313 corresponds to the second laser assembly 200 and is arranged at an angle of 45° relative to the axial direction of the second laser assembly 200.

[0042] like Figure 6 In some embodiments, the first light spot SP1 is a point light spot. In some embodiments, the second light spot SP2 is a circular ring light spot arranged concentrically with the first light spot SP1.

[0043] In some other embodiments, the first light spot SP1 may be in other shapes, and the second light spot SP2 is not limited to being a circular ring-shaped light spot, and its shape may be adjusted according to the product shape of the structure to be welded.

[0044] In some embodiments, the first laser assembly 100 includes a first lens barrel 110, a first collimator 120, and a first plane adjustment member 130. One end of the first lens barrel 110 is connected to the first optical fiber OF1, and the other end is connected to the first mounting seat 300. The first collimator 120 is installed in the first lens barrel 110. The first plane adjustment member 130 movably connects the first collimator 120 to the first lens barrel 110. The first plane adjustment member 130 is used to adjust the position of the first collimator 120 relative to the first lens barrel 110 to adjust the position of the first light spot SP1 on the surface to be welded. By setting the first plane adjustment member 130, the position of the first light spot SP1 on the surface to be welded can be actively adjusted, so that the first light beam is irradiated on the pin to be welded.

[0045] In some embodiments, the first laser assembly 100 also includes a first adjustment knob K1 and a second adjustment knob K2 exposed on the first lens barrel 110. The first adjustment knob K1 and the second adjustment knob K2 are respectively connected to the first plane adjustment member 130 in transmission connection. The rotation of the first adjustment knob K1 drives the first plane adjustment member 130 to move relative to the first lens barrel 110, so that the first light spot SP1 moves along the first horizontal direction on the surface to be welded. The rotation of the second adjustment knob K2 drives the first plane adjustment member 130 to move relative to the first lens barrel 110, so that the first light spot SP1 moves along the second horizontal direction on the surface to be welded, wherein the second horizontal direction intersects with the first horizontal direction. Specifically, the second horizontal direction can be perpendicular to the first horizontal direction.

[0046] In some embodiments, the first laser assembly 100 further includes a first axial adjustment member 140. The first axial adjustment member 140 movably connects the first optical fiber OF1 to the first lens barrel 110. The first axial adjustment member 140 can drive the first optical fiber OF1 to move relative to the first lens barrel 110 along the axial direction of the first lens barrel 110. By providing the first axial adjustment member 140, the light-emitting end of the first optical fiber OF1 can move relative to the first lens barrel 110 along the axial direction of the first lens barrel 110, thereby adjusting the focal height of the first light beam after it is emitted from the emission lens barrel 320, so as to facilitate accurate implementation of laser welding.

[0047] In some embodiments, the first laser assembly 100 further includes a third adjustment knob K3 exposed outside the first lens barrel 110, and the third adjustment knob K3 is transmission-connected to the first axial adjustment member 140, and rotation of the third adjustment knob K3 drives the first axial adjustment member 140 to move axially relative to the first lens barrel 110 along the first lens barrel 110.

[0048] In some embodiments, the axial position of the first optical fiber OF1 relative to the first lens barrel 110 is adjusted according to the height of the pins to be welded.

[0049] In some embodiments, the first optical fiber OF1 is connected to the first axial adjustment member 140 via the first flange F1. In some embodiments, the first laser assembly 100 further includes a first protective cover 150, which is connected to the first lens barrel 110, and the first optical fiber OF1 is passed through the first protective cover 150, so that the first protective cover 150 covers one end of the first optical fiber OF1.

[0050] In some embodiments, the second laser assembly 200 includes a second lens barrel 210, a perforated member 220, and a second collimator 230. One end of the second lens barrel 210 is connected to the second optical fiber OF2, and the other end is connected to the first mounting base 300. The perforated member 220 has a through hole that penetrates the second lens barrel 210 along the axial direction. The second collimator 230 is installed in the second lens barrel 210. The second laser in the second optical fiber OF2 passes through the perforated member 220 and the second collimator 230 in sequence.

[0051] In some embodiments, the diameter of the through hole of the perforated member 220 is 4 mm to 8 mm, for example, 6 mm.

[0052] In some embodiments, the second laser assembly 200 further includes an axle 240 and a second plane adjusting member 250. The second plane adjusting member 250 movably connects the axle 240 to the second lens barrel 210. The second plane adjusting member 250 is used to adjust the position of the axle 240 relative to the second lens barrel 210 to adjust the position of the second light spot SP2 on the surface to be welded.

[0053] In the above embodiment, the second plane adjusting member 250 adjusts the position of the axicon 240 relative to the second lens barrel 210, thereby adjusting the position of the second light spot SP2 on the surface to be welded. In some embodiments, the second light spot SP2 is an annular light spot, and the second plane adjusting member 250 adjusts the axicon 240 to ensure that the second light spot SP2 is concentric with the first light spot SP1.

[0054] In some embodiments, the second laser assembly 200 also includes a fourth adjustment knob K4 and a fifth adjustment knob K5 exposed on the second lens barrel 210. The fourth adjustment knob K4 and the fifth adjustment knob K5 are respectively connected to the second plane adjustment member 250 in transmission. The rotation of the fourth adjustment knob K4 drives the second plane adjustment member 250 to move relative to the second lens barrel 210, so that the second light spot SP2 moves along the first horizontal direction on the surface to be welded. The rotation of the fifth adjustment knob K5 drives the second plane adjustment member 250 to move relative to the second lens barrel 210, so that the second light spot SP2 moves along the second horizontal direction on the surface to be welded, wherein the second horizontal direction intersects with the first horizontal direction. Specifically, the second horizontal direction can be perpendicular to the first horizontal direction.

[0055] In some embodiments, the second laser assembly 200 further includes a second axial adjustment member 260. The second axial adjustment member 260 movably connects the hole member 220 with the second lens barrel 210. The second axial adjustment member 260 can drive the hole member 220 to move relative to the second lens barrel 210 along the axial direction of the second lens barrel 210 to adjust the size of the inner contour of the second light spot SP2.

[0056] In some embodiments, the second laser assembly 200 further includes a third axial adjustment member 270. The third axial adjustment member 270 movably connects the second collimator 230 to the second lens barrel 210. The third axial adjustment member 270 can drive the second collimator 230 to move relative to the second lens barrel 210 along the axial direction of the second lens barrel 210 to adjust the size of the outer contour of the second light spot SP2.

[0057] By setting the second axial adjustment member 260, the size of the inner contour of the second light spot SP2 can be adjusted, and by setting the third axial adjustment member 270, the size of the outer contour of the second light spot SP2 can be adjusted, thereby achieving adjustment of the shape and size of the second light spot SP2, so that the laser head can be applied to a variety of structures to be welded.

[0058] In some embodiments, the second laser assembly 200 further includes a sixth adjustment knob K6 exposed on the second lens barrel 210, and the sixth adjustment knob K6 is transmission-connected to the second axial adjustment member 260, and the rotation of the sixth adjustment knob K6 drives the second axial adjustment member 260 to move axially relative to the second lens barrel 210 along the second lens barrel 210.

[0059] In some embodiments, the second laser assembly 200 also includes a seventh adjustment knob K7 exposed on the second lens barrel 210, and the seventh adjustment knob K7 is transmission-connected to the third axial adjustment member 270, and the rotation of the seventh adjustment knob K7 drives the third axial adjustment member 270 to move axially relative to the second lens barrel 210 along the second lens barrel 210.

[0060] In some embodiments, the second optical fiber OF2 is connected to the second lens barrel 210 via a second flange F2. In some embodiments, the second laser assembly 200 further includes an optical fiber fixing seat 280, which is located at one end of the second lens barrel 210 close to the second optical fiber OF2, and the second optical fiber OF2 is fixedly connected to the optical fiber fixing seat 280. In this embodiment, the second optical fiber OF2 is fixedly connected to the optical fiber fixing seat 280 via a second flange F2. In some embodiments, the second laser assembly 200 further includes a second protective cover 290, which is connected to the second lens barrel 210, and the second optical fiber OF2 is passed through the second protective cover 290, so that the second protective cover 290 covers one end of the second optical fiber OF2.

[0061] In some embodiments, the laser head further includes a detection assembly 400. The detection assembly 400 is detachably connected to the first mounting seat 300, and the detection assembly 400 includes an image acquisition assembly 410, a temperature detection assembly 420, and a second mounting seat 430. The image acquisition assembly 410 and the temperature detection assembly 420 are arranged in parallel on the second mounting seat 430. The second mounting seat 430 is detachably connected to the first mounting seat 300.

[0062] In some embodiments, the detection assembly 400 has a first installation state and a second installation state.

[0063] Figures 1 to 3 The structure of an embodiment of the laser head of the utility model is illustrated when the detection component is in the first installation state. In the first installation state, the temperature detection component 420 is coaxially arranged with the output lens barrel 320, and the image acquisition component 410, the temperature detection component 420, the first laser component 100, and the second laser component 200 are arranged in sequence along a preset direction.

[0064] Figure 7 , Figure 8 They are respectively a front view schematic diagram and a top view schematic diagram of an embodiment of the laser head of the utility model when the detection component is in the second installation state. In the second installation state, the temperature detection component 420 is coaxially arranged with the output lens barrel 320, the temperature detection component 420, the first laser component 100, and the second laser component 200 are arranged in sequence along the first direction, and the image acquisition component 410 and the temperature detection component 420 are arranged in sequence along the second direction, and the second direction intersects with the first direction.

[0065] In the above embodiment, the detection component 400 has a first installation state and a second installation state, thereby realizing a variety of assembly forms of the detection component 400 and the first mounting seat 300, so that the structural form of the laser head can be changed, which is convenient for adjusting the form of the laser head according to different usage scenarios, so that the laser head can be more easily applied to a variety of welding scenarios.

[0066] In some embodiments, the second mounting base 430 includes a second reflection component 431, a first connection member 432, and a second connection member 433. The image acquisition component 410 includes a third lens barrel 411 and an image acquisition device 412. The image acquisition device 412 is located at one end of the third lens barrel 411, and the other end of the third lens barrel 411 is mounted on the second mounting base 430 through the first connection member 432. The light at the surface to be welded enters the image acquisition device 412 through the exit lens barrel 320, the second reflection component 431, and the third lens barrel 411 in sequence. The temperature detection component 420 is mounted on the second mounting base 430 through the second connection member 433.

[0067] In some embodiments, the image acquisition device 412 is a charge coupled device (CCD) camera. In some embodiments, the temperature detection component 420 is a pyrometer.

[0068] In some embodiments, the second reflective component 431 includes a fourth reflective member 4311 and a fifth reflective member 4312. The fourth reflective member 4311 and the fifth reflective member 4312 are parallel to each other. The fourth reflective member 4311 corresponds to the image acquisition component 410 and is arranged at an angle of 45° relative to the axial direction of the image acquisition component 410. The fifth reflective member 4312 corresponds to the temperature detection component 420 and is arranged at an angle of 45° relative to the axial direction of the temperature detection component 420.

[0069] In some embodiments, the second mounting base 430 further includes a third collimator 434 and a fourth collimator 435. The third collimator 434 corresponds to the image acquisition component 410, and the fourth collimator 435 corresponds to the temperature detection component 420.

[0070] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A laser head for universal plug-in welding, characterized in that: The laser head comprises: a first laser component, wherein the first laser component is connected to a first optical fiber, and a first laser in the first optical fiber is output as a first light beam after passing through the first laser component; a second laser assembly, the second laser assembly being connected to a second optical fiber, the second laser assembly being used to configure a second laser in the second optical fiber into a second light beam having a hollow structure in cross section; and The first mounting seat is capable of connecting the first laser component and the second laser component. The first mounting seat includes a first reflecting component and an output lens barrel. The first reflecting component is capable of reflecting at least one of the first light beam and the second light beam, so that the first light beam and the second light beam are emitted to the surface to be welded through the output lens barrel together, wherein the first light beam forms a first light spot on the surface to be welded, and the second light beam forms a second light spot on the surface to be welded in a closed pattern surrounding the first light spot.

2. The laser head according to claim 1, characterized in that: The first light spot is a point-shaped light spot; the second light spot is a circular ring-shaped light spot arranged concentrically with the first light spot.

3. The laser head according to claim 1, characterized in that: The first laser assembly comprises: A first lens barrel, one end of which is connected to the first optical fiber, and the other end of which is connected to the first mounting seat; A first collimating lens, installed in the first lens barrel; The first plane adjusting member movably connects the first collimating lens with the first lens barrel, and the first plane adjusting member is used to adjust the position of the first collimating lens relative to the first lens barrel, so as to adjust the position of the first light spot on the surface to be welded.

4. The laser head according to claim 3, characterized in that: The first laser assembly further comprises: The first axial adjustment member movably connects the first optical fiber with the first lens barrel, and the first axial adjustment member can drive the first optical fiber to move relative to the first lens barrel along the axial direction of the first lens barrel.

5. The laser head according to claim 1, characterized in that: The second laser assembly comprises: a second lens barrel, one end of which is connected to the second optical fiber, and the other end of which is connected to the first mounting seat; A hole-bearing member, wherein the hole-bearing member has a through hole that penetrates the second lens barrel along the axial direction thereof; The second collimator is installed in the second lens barrel, and the second laser in the second optical fiber passes through the hole-bearing member and the second collimator in sequence.

6. The laser head according to claim 5, characterized in that: The second laser assembly further comprises: Axicon; The second plane adjusting member movably connects the axle with the second lens barrel, and the second plane adjusting member is used to adjust the position of the axle relative to the second lens barrel, so as to adjust the position of the second light spot on the surface to be welded.

7. The laser head according to claim 5, characterized in that: The second laser assembly further comprises: a second axial adjustment member, movably connecting the member with the hole with the second lens barrel, and capable of driving the member with the hole to move relative to the second lens barrel along the axial direction of the second lens barrel, so as to adjust the size of the inner contour of the second light spot; The third axial adjustment member movably connects the second collimator and the second lens barrel. The third axial adjustment member can drive the second collimator to move relative to the second lens barrel along the axial direction of the second lens barrel to adjust the size of the outer contour of the second light spot.

8. The laser head according to claim 1, characterized in that: Also includes: A detection component is detachably connected to the first mounting seat, and the detection component includes an image acquisition component, a temperature detection component and a second mounting seat, and the image acquisition component and the temperature detection component are arranged in parallel on the second mounting seat.

9. The laser head according to claim 8, characterized in that: The detection component has a first installation state and a second installation state, In the first installation state, the temperature detection component is coaxially arranged with the output lens barrel, and the image acquisition component, the temperature detection component, the first laser component, and the second laser component are arranged in sequence along a preset direction; In the second installation state, the temperature detection component is coaxially arranged with the output lens barrel, the temperature detection component, the first laser component, and the second laser component are arranged in sequence along a first direction, the image acquisition component and the temperature detection component are arranged in sequence along a second direction, and the second direction intersects with the first direction.

10. The laser head according to claim 8, characterized in that: The second mounting base includes a second reflective component, a first connecting member and a second connecting member. The image acquisition assembly includes a third lens barrel and an image acquisition device, wherein the image acquisition device is located at one end of the third lens barrel, and the other end of the third lens barrel is mounted on the second mounting seat through the first connecting member, and the light at the surface to be welded enters the image acquisition device via the exit lens barrel, the second reflection assembly and the third lens barrel in sequence. The temperature detection component is mounted on the second mounting seat through the second connecting member.

Images