Laser galvanometer system and high-power laser scanning welding head

Abstract

The invention relates to the field of welding, and particularly discloses a laser galvanometer system and a high-power laser scanning welding head. The laser galvanometer system comprises a mounting shell, a galvanometer mounting seat and a galvanometer system; the galvanometer mounting seat is mounted on the inner bottom surface of the mounting shell, a mounting cavity is formed in the bottom surface of the galvanometer mounting seat, and the galvanometer system is mounted in the galvanometer mounting seat; the galvanometer system comprises a first galvanometer, the first galvanometer comprises a first motor, a first lens bracket and a first lens, and the first lens bracket comprises a connecting part and a mounting part; the connecting part is connected to a first motor output shaft; the mounting part is connected to the side of the connecting part away from the first motor, the side of the mounting part is provided with a mounting groove for placing the side of the first lens, and the edge of one side of the first lens is adhered in the mounting groove; two protection tables are connected to the side face of the mounting part and located on the two sides of the mounting groove correspondingly. The two ends of the installation part are connected with two protrusions, and the two protrusions are located on the two sides of the installation groove respectively. The laser scanning welding head has the effect of solving the heat effect of the laser scanning welding head.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and in particular to a laser galvanometer system and a high-power laser scanning welding head. Background Art

[0002] In the modern processing industry, the application of laser processing is becoming more and more extensive, especially the application demand of high-power laser processing is increasing, such as battery pack welding and car body welding.

[0003] In order to achieve flexible and accurate control of the laser, laser galvanometers are often used to achieve laser scanning processing in laser processing applications. In the application scenario of using galvanometer scanning for laser processing, when the galvanometer scans and processes metal workpieces such as battery packs and car bodies, the scattering and thermal radiation of the incident laser beam itself, and the scanning beam reflected by the mirror after the surface of the metal workpiece melts and returns after passing through the field mirror, will produce a large coverage thermal effect, including lenses, mirror frames, galvanometer brackets, boxes, etc. will be affected. Especially for the processing of some highly reflective materials, such as copper and aluminum, the high reflective thermal effect will cause irreversible damage to the components of the above-mentioned galvanometer system.

[0004] In addition, for application scenarios that require the use of high-power lasers for processing, since high-power lasers themselves have very high thermal effects, in high-power laser processing applications using galvanometer scanning, the scattering and thermal radiation of the high-power lasers themselves, as well as the thermal effects generated by the mirror reflection of the processed parts will have a greater impact on the galvanometer and lenses. Especially for the lenses and frames, since ordinary galvanometer lenses are generally glued to the frames with glue, ordinary frames have no reflection ability and shielding structure, resulting in the reflected light directly irradiating the frames and glue, causing the frame temperature to rise, the glue to deform, coke or even carbonize due to heat, and black dust impurities to adhere to the surface of the lens, which will cause the lens to be burned, cracked or even fall off by the high-power laser. In addition, the laser will also directly reflect onto the galvanometer motor, causing damage to the galvanometer.

[0005] Therefore, in high-power laser processing applications that want to use galvanometer scanning, it is particularly important to systematically solve the impact of high-power laser scattering and mirror reflection of the workpiece on the lens and galvanometer system. In particular, it is important to have a frame structure that can carry and protect the high-power laser galvanometer lens, reduce laser damage to the galvanometer and lens, and achieve stable and reliable high-power laser scanning welding. Summary of the invention

[0006] In order to solve the influence of high-power laser scattering and mirror reflection of the workpiece on the thermal effect of the lens and the galvanometer system, the present application provides a laser galvanometer system and a high-power laser scanning welding head to realize the application of high-power laser stable scanning welding.

[0007] In the first aspect, a laser galvanometer system provided in the present application adopts the following technical solution: A laser galvanometer system comprises a first galvanometer, wherein the first galvanometer comprises a first motor, a first mirror frame and a first lens, wherein the first mirror frame comprises a connecting portion and a mounting portion; the connecting portion is connected to the output shaft of the first motor; the mounting portion is connected to the side of the connecting portion away from the first motor, and a mounting groove for placing the side edge of the first lens is provided on the side of the mounting portion away from the connecting portion, wherein the mounting groove passes through both ends of the mounting portion, and one side edge of the first lens is pasted in the mounting groove; two protective platforms are connected to the side of the mounting portion away from the connecting portion, and the two protective platforms are respectively located on both sides of the mounting groove; two protrusions are connected to both ends of the mounting portion, and the two protrusions are respectively located on both sides of the mounting groove.

[0008] Optionally, the laser galvanometer system further includes a second galvanometer, and the second galvanometer includes a second motor, a second mirror frame and a second lens; the second mirror frame is connected to the output shaft of the second motor, and the second lens is mounted on the second mirror frame.

[0009] Optionally, a first groove is provided on the sides of the two protective platforms that are close to each other, and a second groove is formed between the two protrusions at the same end.

[0010] Optionally, the length of the mounting groove is not greater than the length of a side edge of the first lens located in the mounting groove.

[0011] Optionally, two side surfaces of the mounting portion are chamfered surfaces, and the side surfaces of the protective platform that are away from each other and the side surfaces of the mounting portion jointly form a chamfered surface; and the side surface of the protrusion that is away from the mounting portion is an arc surface.

[0012] Optionally, the first frame further comprises a shielding plate, the end surface of the mounting portion away from the first lens is connected to the shielding plate, and the connecting portion is connected to the side surface of the shielding plate away from the mounting portion.

[0013] Optionally, the connecting portion includes a ring and a hoop; one end of the ring is connected to the side of the baffle plate away from the mounting portion, and the end face of the ring away from the baffle plate is provided with two symmetrical openings, and the end of the output shaft of the first motor is inserted into the ring; two hoops are provided, two of which are connected to the circumferential surface of the ring, and the two hoops are located on both sides of the opening, and the two end faces of the two hoops are aligned respectively, and the two ends of the two hoops are detachably connected.

[0014] Optionally, surfaces of the first mirror frame and the second mirror frame are both coated with reflective coating materials.

[0015] In the second aspect, the present application provides a high-power laser scanning welding head adopts the following technical solution: A high-power laser scanning welding head comprises a mounting shell, a galvanometer mounting seat and the galvanometer system; one of the side panels of the mounting shell is provided with a light inlet, the bottom panel of the mounting shell is provided with a light outlet, and the two side panels adjacent to the light inlet side panel are mounting panels of a manipulator; the galvanometer mounting seat is mounted on the inner bottom surface of the mounting shell, and one side surface of the galvanometer mounting seat is tightly attached to the inner wall of the light inlet side panel; the bottom surface of the galvanometer mounting seat is provided with a mounting cavity, and the mounting cavity is connected with the light outlet; the side surface of the galvanometer mounting seat close to the light inlet is provided with a through hole connected with the mounting cavity, and the light inlet is connected with the through hole; the galvanometer system is installed in the galvanometer mounting seat, and the galvanometer system is used to reflect the laser incident from the light inlet out of the light outlet.

[0016] Optionally, the top surface of the galvanometer mounting seat is provided with an inclined first placement groove, and the bottom of the first placement groove is provided with a first through groove for the first lens, the first mirror frame and the first motor end to extend into the mounting cavity; a first connecting plate is provided in the first placement groove, the first connecting plate is connected to the first placement groove, and the first motor passes through the first connecting plate; a first fixing clamp is connected to the top surface of the first connecting plate, the inner circumference of the first fixing clamp is tightly attached to the circumference of the first motor, and first movable clamps are connected to both end surfaces of the first fixing clamp, and the first movable clamps are pressed against the circumference of the first motor.

[0017] Optionally, two first positioning pins are provided on the side of the first connecting plate away from the first fixing clamp, and two first positioning grooves for inserting the two first positioning pins are provided on the bottom surface of the first placement groove; a first limiting ring is connected to the circumference of the first motor, and the first limiting ring is tightly attached to the top surfaces of the first fixing clamp and the first movable clamp.

[0018] Optionally, a second placement groove is provided on the side of the galvanometer mounting seat away from the light entrance, and a second through groove is provided at the bottom of the second placement groove for the second lens, the second mirror frame and the second motor end to extend into the mounting cavity; a second connecting plate is provided in the second placement groove, the second connecting plate is connected to the second placement groove, and the second motor passes through the second connecting plate; a second fixing clamp is connected to the top surface of the second connecting plate, the inner circumference of the second fixing clamp is tightly attached to the circumference of the second motor, and second movable clamps are connected to both end surfaces of the second fixing clamp, and the second movable clamps are pressed against the circumference of the second motor.

[0019] Optionally, two second positioning pins are provided on the side of the second connecting plate away from the second fixing clamp, and two second positioning grooves for inserting the two second positioning pins are provided on the bottom surface of the second placement groove; a second limiting ring is connected to the circumference of the second motor, and the second limiting ring is tightly attached to the top surfaces of the second fixing clamp and the second movable clamp.

[0020] Optionally, a water inlet channel and a water outlet channel are provided in the light inlet side panel, and the water inlet channel and the water outlet channel are connected to the top surface of the light inlet side panel; a first channel is provided in the galvanometer mounting seat, and the end of the first channel is connected to the bottom of the water inlet channel; the mounting cavity is connected to a boss at the top corner away from the light inlet side panel, and a second channel is provided in the galvanometer mounting seat, the second channel passes through the boss, and one end of the second channel is connected to the end of the first channel away from the water inlet channel; a third channel is provided in the galvanometer mounting seat, and the end of the third channel is connected to the bottom of the water outlet channel; a fourth channel is provided in the galvanometer mounting seat, one end of the fourth channel is connected to the end of the second channel away from the first channel, and the other end of the fourth channel is connected to the end of the third channel away from the water outlet channel; the first channel, the second channel, the fourth channel and the third channel are provided around the mounting cavity.

[0021] Optionally, a cooling tube is provided in the installation cavity along the outer side of the first through groove, the first mirror frame can pass through the cooling tube, and the cooling tube is flat; both ends of the cooling tube are connected to round tubes, the round tube is located below the boss, and the end of the round tube away from the cooling tube is bent toward the boss; the bottom surface of the boss is provided with sockets for respectively inserting the two ends of the round tube, and two fifth flow channels are provided in the boss, one end of the fifth flow channel is connected to the second flow channel, and the two sockets are respectively connected to the two fifth flow channels through the sixth flow channel; the second flow channel is located between the two fifth flow channels and is partially closed; the cooling tube is installed on the inner wall of the installation cavity through a connecting component.

[0022] Optionally, the connecting assembly includes a first connecting block, a fixing plate, a second connecting block, a third connecting block, a first connecting piece and a second connecting piece; the first connecting block is connected to the bottom surface of the boss, and both ends of the fixing plate are respectively sleeved on the circumferential surfaces of the two circular tubes, the circular tubes are fixedly connected to the fixing plate, and the top surface of the fixing plate is provided with a slot for inserting the first connecting block, and the fixing plate is connected to the bottom surface of the first connecting block; the second connecting block and the third connecting block are both connected to the top surface of the mounting cavity, the first connecting piece and the second connecting piece are connected to the outer side surface of the cooling tube, the first connecting piece is connected to the bottom surface of the second connecting block, and the second connecting piece is connected to the bottom surface of the third connecting block.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. By arranging a protective platform and a protrusion on the mounting part, when the light scattered by the incident laser or the light reflected by the mirror after the surface of the welded metal workpiece melts is directed to the first lens, the light scattered by the laser is irradiated on the protective platform and the protrusion, and the protective platform and the protrusion block the laser, so that the laser cannot be directly irradiated on the glue, thereby preventing the glue from being damaged by excessive temperature and affecting the connection between the first lens and the first frame; 2. The first groove is formed by the protective platform and the second groove is formed by the protrusion, so that the flow of glue in the installation groove can be cut off; when installing the first lens, only the glue needs to be located in the installation groove. After the glue flows to the first groove and the second groove, if the laser irradiates the glue in the first groove and the second groove, the glue will transfer heat to the glue in the installation groove, causing the glue temperature to be too high and damaged; during assembly, the glue in the first groove and the second groove can be cleaned by tools to avoid laser irradiation; it is worth noting that if the first groove and the second groove are not formed between the protective platform and the two protrusions, when the first lens is attached by glue, the glue is squeezed and the glue will flow to the inner wall of the protective platform and the protrusion adjacent to the installation groove. At this time, the glue is not easy to clean, and if it is not cleaned thoroughly, it is easy to irradiate the glue on the protective platform and the inner wall of the protrusion during laser irradiation; 3. By setting a shielding plate, the shielding plate can shield the scattered and reflected lasers to prevent the lasers from directly irradiating the first motor, thereby reducing the heat generated by the first motor, which is beneficial to protecting the first motor and reducing the self-excitation of the galvanometer of the first motor; 4. In order to cool down the scanning welding head, cold water is injected into the water inlet channel, and the cold water passes through the first channel, the second channel, the fourth channel, the third channel and the water outlet channel in sequence, and is discharged to the outside through the water outlet channel, which can quickly take away the heat, cool down the mounting shell, the galvanometer mounting seat and the galvanometer system, achieve cooling effect, and ensure stable operation of the system; by designing the first channel, the second channel, the fourth channel and the third channel closer to the mounting cavity, the heat generated in the system can be taken away more quickly; 5. In order to better dissipate heat, an exposed cooling pipe is arranged in the installation cavity. When cold water enters the second flow channel, the cold water in the second flow channel enters the fifth flow channel closest to the first flow channel, and then enters the sixth flow channel, the round tube, the cooling pipe, and then flows back to another round tube, another sixth flow channel, another fifth flow channel, and finally enters the second flow channel; due to the exposed cooling pipe, the installation cavity can be better cooled, making the cooling effect more significant. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the galvanometer in the prior art, and illustrates the scattered light irradiating the glue and the motor; Figure 2 This is a schematic diagram of the structure of a laser scanning welding head according to an embodiment of the present application; Figure 3 It is a schematic diagram of the exploded structure of the installation shell of the embodiment of the present application; Figure 4 It is a structural schematic diagram of a galvanometer mounting seat according to an embodiment of the present application; Figure 5 It is a structural schematic diagram of the galvanometer system of an embodiment of the present application; Figure 6 is a schematic structural diagram of the first galvanometer in an embodiment of the present application; Figure 7 This is a schematic diagram of the structure of the first galvanometer in another viewing angle of the embodiment of the present application; Figure 8 is a schematic diagram of the cross-sectional structure of the light entrance side plate of an embodiment of the present application; Fig. 9 is a schematic cross-sectional structure diagram of a galvanometer mounting base according to an embodiment of the present application; Fig.10 This is a schematic diagram of the structure of the cooling pipe and the connecting assembly of Example 2 of the present application; Fig.11 This is a schematic diagram of the structure of the first connecting block and the fixing plate of Example 2 of the present application; Fig.12 is a schematic cross-sectional structure diagram of another part of the galvanometer mounting base of Example 2 of the present application; Fig.13 yes Fig.12 A schematic diagram of the enlarged structure of part A; Fig.14 It is a schematic diagram of the simulation of the reflected light path behind the working plane in the practical case of this application; Fig.15 yes Fig.14 The partially enlarged structural schematic diagram in the figure shows that the light path is irradiated on the first mirror frame.

[0025] Description of reference numerals: 01, motor; 02, lens; 1, mounting shell; 11, light inlet side plate; 111, light inlet; 12, light outlet; 13, mounting plate; 2, galvanometer mounting seat; 21, mounting cavity; 22, through hole; 23, first placement slot; 24, first through slot; 25, first positioning slot; 26, second placement slot; 27, second through slot; 28, second positioning slot; 29, boss; 291, jack; 3, galvanometer system; 4, first galvanometer mirror; 41, first motor; 42, first mirror frame; 421, connecting portion; 4211, holding ring; 4212, holding hoop; 4213, opening; 422, mounting portion; 4221, mounting groove; 4222, protection platform; 4223, protrusion; 4224, first groove; 4225, second groove; 4226, chamfered surface; 4227, arc surface; 423, shielding plate; 43, first lens; 5, second galvanometer; 51 , second motor; 52, second frame; 53, second lens; 6, first connecting plate; 61, first fixing clip; 62, first movable clip; 63, first positioning pin; 64, first limiting ring; 7, second connecting plate; 71, second fixing clip; 72, second movable clip; 73, second positioning pin; 74, second limiting ring; 81, water inlet channel; 82, water outlet channel; 83, first channel; 84, second channel; 85, third flow channel; 86, fourth flow channel; 87, first sealing ring; 88, fifth flow channel; 89, sixth flow channel; 9, cooling pipe; 91, round pipe; 92, second sealing ring; 93, connecting assembly; 931, first connecting block; 9311, strip groove; 932, fixing plate; 9321, slot; 9322, insert; 933, second connecting block; 934, third connecting block; 935, first connecting piece; 936, second connecting piece. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-15 This application is described in further detail.

[0027] The straight lines with arrows in the drawings of this application represent laser beams.

[0028] The present application discloses a laser galvanometer system and a high-power laser scanning welding head. Figure 1 , scattered light shines on the glue, the lens 02 bonded by the glue, and the motor 01.

[0029] Example 1 Reference Figure 2-9The laser scanning welding head includes a mounting shell 1, a galvanometer mounting seat 2 and a galvanometer system 3; the mounting shell 1 is square, one of the side panels of the mounting shell 1 is provided with a light inlet 111, the bottom plate of the mounting shell 1 is provided with a light outlet 12, and the two side panels adjacent to the side panel 11 of the light inlet 111 are mounting plates 13 of the manipulator, and two manipulator mounting positions are provided, that is, in the form of a double manipulator mounting plate, which provides users with more installation options and improves installation efficiency and convenience; the galvanometer mounting seat 2 is installed on the mounting shell 1 The inner bottom surface of the shell 1 and one side of the galvanometer mounting seat 2 are tightly attached to the inner wall of the side plate 11 of the light inlet 111; a mounting cavity 21 is provided on the bottom surface of the galvanometer mounting seat 2, and the mounting cavity 21 is connected with the light outlet 12; a through hole 22 connected with the mounting cavity 21 is provided on the side of the galvanometer mounting seat 2 close to the light inlet 111, and the light inlet 111 is connected with the through hole 22; the galvanometer system 3 is installed in the galvanometer mounting seat 2, and the galvanometer system 3 is used to reflect the laser incident from the light inlet 111 out of the light outlet 12.

[0030] The laser galvanometer system 3 includes a first galvanometer 4, which includes a first motor 41, a first mirror frame 42 and a first lens 43. The first mirror frame 42 includes a connecting portion 421 and a mounting portion 422. The connecting portion 421 is connected to the output shaft of the first motor 41; the mounting portion 422 is integrally formed on the side of the connecting portion 421 away from the first motor 41, and the side of the mounting portion 422 away from the connecting portion 421 is provided with a mounting groove 4221 for placing the side edge of the first lens 43, the mounting groove 4221 runs through both ends of the mounting portion 422, and one side edge of the first lens 43 is pasted in the mounting groove 4221; two protective platforms 4222 are integrally formed on the side of the mounting portion 422 away from the connecting portion 421, and the two protective platforms 4222 are respectively located on both sides of the mounting groove 4221; two protrusions 4223 are integrally formed on both ends of the mounting portion 422, and the two protrusions 4223 are respectively located on both sides of the mounting groove 4221.

[0031] Regarding the pasting of the first lens 43 and the mounting portion 422, the side edge of the first lens 43 is glued to the mounting groove 4221 by glue. When there is no shielding around the mounting groove 4221, the scattered laser will irradiate the side of the mounting groove 4221, and the heat transmitted by the laser will heat the glue. By arranging a protective platform 4222 and a protrusion 4223 on the mounting portion 422, when the light scattered by the incident laser or the light reflected by the mirror after the surface of the welded metal workpiece melts is directed to the first lens 43, the light scattered by the laser is irradiated on the protective platform 4222 and the protrusion 4223. The protective platform 4222 and the protrusion 4223 block the laser, so that the laser cannot be directly irradiated on the glue, thereby preventing the glue from being damaged by excessive temperature and affecting the connection between the first lens 43 and the first frame 42.

[0032] A first groove 4224 is provided on the sides of the two protective platforms 4222 that are close to each other, and a second groove 4225 is formed between the two protrusions 4223 at the same end; the first groove 4224 is formed by the protective platform 4222 and the second groove 4225 is formed by the protrusion 4223, so that the flow of glue in the installation groove 4221 can be cut off; when installing the first lens 43, it is only necessary for the glue to be located in the installation groove 4221. When the glue flows to the first groove 4224 and the second groove 4225, if the laser irradiates the glue in the first groove 4224 and the second groove 4225, the glue will transfer heat to the glue in the installation groove 4221, causing The glue is damaged due to excessive temperature; during assembly, the glue in the first groove 4224 and the second groove 4225 can be cleaned with a tool to avoid laser irradiation; it is worth noting that if the first groove 4224 and the second groove 4225 are not formed between the protective platform 4222 and the two protrusions 4223, when the first lens 43 is attached by glue, the glue is squeezed and the glue will flow to the inner wall of the protective platform 4222 and the protrusion 4223 adjacent to the mounting groove 4221. At this time, the glue is not easy to clean, and if it is not cleaned thoroughly, the glue on the inner wall of the protective platform 4222 and the protrusion 4223 is easily irradiated during laser irradiation.

[0033] The length of the mounting groove 4221 is not greater than the length of one side of the first lens 43 in the mounting groove 4221 ; the first lens 43 can be completely and accurately positioned in the mounting groove 4221 on the side facing the mounting groove 4221 to prevent glue from overflowing.

[0034] The two side surfaces of the mounting portion 422 are chamfered surfaces 4226, and the side surfaces of the protective platform 4222 that are away from each other and the side surfaces of the mounting portion 422 together form the chamfered surface 4226; the side surface of the protrusion 4223 that is away from the mounting portion 422 is an arc surface 4227; when the laser is irradiated onto the protective platform 4222 and the protrusion 4223, the chamfered surface 4226 formed by the mounting portion 422 and the protective platform 4222 and the arc surface 4227 of the protrusion 4223 are used to reflect the laser, thereby reducing the heat generated by the laser when irradiating onto the mounting portion 422; at the same time, the chamfered surface 4226 of the mounting portion 422 can avoid blocking the light output path.

[0035] The first lens frame 42 also includes a baffle plate 423, which is disc-shaped. The end face of the mounting portion 422 away from the first lens 43 is integrally formed in the middle position of the baffle plate 423, and the connecting portion 421 is connected to the side of the baffle plate 423 away from the mounting portion 422; by setting the baffle plate 423, the baffle plate 423 can block the scattered and reflected laser to prevent the laser from directly irradiating the first motor 41, thereby reducing the heat generated by the first motor 41, which is beneficial to protecting the first motor 41 and reducing the self-excitation of the galvanometer of the first motor 41.

[0036] The connecting portion 421 includes a ring 4211 and a hoop 4212; one end of the ring 4211 is integrally formed at the middle position of the side of the baffle plate 423 away from the mounting portion 422, and two symmetrical openings 4213 are provided on the end face of the ring 4211 away from the baffle plate 423, and the output shaft end of the first motor 41 is inserted into the ring 4211; two hoops 4212 are provided, and the two hoops 4212 are integrally formed on the circumference of the ring 4211, and the two hoops 4212 are located on both sides of the opening 4213, and the two end faces of the two hoops 4212 are aligned respectively, and the two ends of the two hoops 4212 are connected by bolts.

[0037] When the connecting part 421 is installed on the first motor 41, the output shaft of the first motor 41 is inserted into the holding ring 4211, the inner wall of the holding ring 4211 fits with the peripheral surface of the first motor 41, and the bolts on the holding hoop 4212 are tightened. The two holding hoops 4212 tighten the holding ring 4211 on the output shaft of the first motor 41.

[0038] The laser galvanometer system 3 also includes a second galvanometer 5, which includes a second motor 51, a second mirror frame 52 and a second lens 53. The second mirror frame 52 is different from the first mirror frame 42 in that the second mirror frame 52 does not include a shielding plate 423, and the ring 4211 of the second mirror frame 52 is directly integrally formed on the end surface of the mounting portion 422; the connecting portion 421 of the second mirror frame 52 is connected to the output shaft of the second motor 51, and the second lens 53 is mounted on the mounting portion 422 of the second mirror frame 52. The second lens 53 and the first lens 43 have different deflection angles. The laser incident first shoots at the first lens 43, the first lens 43 reflects the laser to the second lens 53, and the second lens 53 then reflects the laser to the metal workpiece to be welded.

[0039] The surfaces of the first mirror frame 42 and the second mirror frame 52 are coated with reflective coating materials; the reflective coating materials can be made of gold, silver or aluminum with high laser reflectivity; the reflective coating materials can reflect the irradiated laser to reduce the heat generated by the laser irradiating the first mirror frame 42 and the second mirror frame 52.

[0040] An inclined first placement groove 23 is provided on the top surface of the galvanometer mounting seat 2, and a first through groove 24 is provided at the bottom of the first placement groove 23 for the ends of the first lens 43, the first lens frame 42 and the first motor 41 to extend into the mounting cavity 21; a first connecting plate 6 is provided in the first placement groove 23, and the first connecting plate 6 is connected to the first placement groove 23 by bolts, and the first motor 41 passes through the first connecting plate 6; a first fixing clip 61 is integrally formed on the top surface of the first connecting plate 6, and the first fixing clip 61 is in an arc shape, and the inner circumference of the first fixing clip 61 is tightly attached to the circumference of the first motor 41, and the two end surfaces of the first fixing clip 61 are connected to the first movable clip 62 by screws, and the first movable clip 62 is pressed tightly against the circumference of the first motor 41.

[0041] Two first positioning pins 63 are provided on the side of the first connecting plate 6 away from the first fixing clamp 61, and two first positioning grooves 25 for inserting the two first positioning pins 63 are provided on the bottom surface of the first placement groove 23; a first limiting ring 64 is connected to the circumference of the first motor 41, and the first limiting ring 64 is tightly attached to the top surfaces of the first fixing clamp 61 and the first movable clamp 62.

[0042] When installing the first galvanometer 4, first pass the output shaft end of the first motor 41 through the first connecting plate 6, then snap the first movable clamp 62 on the circumference of the first motor 41, and connect the first movable clamp 62 and the first fixed clamp 61 by screws, then press the first limiting ring 64 of the first motor 41 on the top surfaces of the first fixed ring and the first movable ring, and then tighten the screws, the screws press the first fixed ring and the first movable ring on the circumference of the first motor 41, and the first motor 41 is fixed on the first connecting plate 6; then assemble the first lens 43 and the first mirror frame 42 on the output shaft of the first motor 41; align the first positioning pin 63 with the first positioning groove 25, align the first lens 43 with the first through groove 24, insert the first positioning pin 63 into the first positioning groove 25, the first lens 43, the first mirror frame 42 and the end of the first motor 41 pass through the first through groove 24, place the first connecting plate 6 in the first placement groove 23, and then fix the first connecting plate 6 in the first placement groove 23 by bolts, so as to realize the installation of the first galvanometer 4.

[0043] A second placement groove 26 is provided on the side of the galvanometer mounting base 2 away from the light entrance 111, and a second through groove 27 is provided at the bottom of the second placement groove 26 for the ends of the second lens 53, the second lens frame 52 and the second motor 51 to extend into the mounting cavity 21; a second connecting plate 7 is provided in the second placement groove 26, and the second connecting plate 7 is connected to the second placement groove 26 by bolts, and the second motor 51 passes through the second connecting plate 7; a second fixing clip 71 is integrally formed on the top surface of the second connecting plate 7, and the second fixing clip 71 is in an arc shape, and the inner circumference of the second fixing clip 71 is tightly attached to the circumference of the second motor 51, and the two end surfaces of the second fixing clip 71 are connected to second movable clips 72 by screws, and the second movable clip 72 is pressed tightly against the circumference of the second motor 51.

[0044] Two second positioning pins 73 are provided on the side of the second connecting plate 7 away from the second fixing clamp 71, and two second positioning grooves 28 for inserting the two second positioning pins 73 are provided on the bottom surface of the second placement groove 26; a second limiting ring 74 is connected to the circumference of the second motor 51, and the second limiting ring 74 is tightly attached to the top surfaces of the second fixing clamp 71 and the second movable clamp 72.

[0045] When installing the second galvanometer 5, first pass the output shaft end of the second motor 51 through the second connecting plate 7, then snap the second movable clamp 72 on the circumference of the second motor 51, and connect the second movable clamp 72 and the second fixed clamp 71 by screws, then press the second limiting ring 74 of the second motor 51 on the top surface of the second fixed ring and the second movable ring, and then tighten the screws. The screws press the second fixed ring and the second movable ring on the circumference of the second motor 51, and the second motor 51 is fixed on the second connecting plate 7; then assemble the second lens 53 and the second mirror frame 52 on the output shaft of the second motor 51; align the second positioning pin 73 with the second positioning groove 28, align the second lens 53 with the second through groove 27, insert the second positioning pin 73 into the second positioning groove 28, the second lens 53, the second mirror frame 52 and the end of the second motor 51 pass through the second through groove 27, and the second connecting plate 7 is placed in the second placement groove 26, and then the second connecting plate 7 is fixed in the second placement groove 26 by bolts, so as to realize the installation of the second galvanometer 5.

[0046] The laser is emitted from the light entrance 111 and the through hole 22 to the first lens 43 , and the first lens 43 reflects the laser obliquely upward. The second lens 53 reflects the light reflected from the first lens 43 downward out of the light exit 12 .

[0047] A water inlet channel 81 and a water outlet channel 82 are vertically arranged in the side plate 11 of the light inlet 111, and the water inlet channel 81 and the water outlet channel 82 are connected to the top surface of the side plate 11 of the light inlet 111 and are connected to the external water channel through a joint; a first channel 83 is arranged in the galvanometer mounting seat 2, and the first channel 83 is located on one side of the top of the installation cavity 21 and is perpendicular to the side plate 11 of the light inlet 111, and the end of the first channel 83 is connected to the bottom of the water inlet channel 81; a boss 29 is integrally formed at the top corner of the side plate 11 of the installation cavity 21 away from the light inlet 111, and a second channel 84 is arranged in the galvanometer mounting seat 2, and the second channel 84 passes through the boss 29, and the second channel 84 passes through the boss 29. The second flow channel 84 is parallel to the side plate 11 of the light entrance 111, and one end of the second flow channel 84 is connected to the end of the first flow channel 83 away from the water inlet flow channel 81; a third flow channel 85 is arranged in the galvanometer mounting seat 2, and the third flow channel 85 is located on one side of the top of the mounting cavity 21, the third flow channel 85 is perpendicular to the side plate 11 of the light entrance 111, and the end of the third flow channel 85 is connected to the bottom of the water outlet flow channel 82; a fourth flow channel 86 is arranged in the galvanometer mounting seat 2, and the fourth flow channel 86 is vertically arranged, and the top end of the fourth flow channel 86 is connected to the end of the second flow channel 84 away from the first flow channel 83, and the bottom end of the fourth flow channel 86 is connected to the end of the third flow channel 85 away from the water outlet flow channel 82.

[0048] Two annular grooves are provided on the side of the side plate 11 of the galvanometer mounting base 2 close to the light inlet 111, which are respectively arranged around the circumference of the water inlet channel 81 and the circumference of the water outlet channel 82. A first sealing ring 87 is provided in the annular groove. The first sealing ring 87 is pressed against the side plate 11 of the light inlet 111. The first sealing ring 87 seals the connection between the water inlet channel 81 and the first channel 83, and the first sealing ring 87 seals the connection between the water outlet channel 82 and the third channel 85.

[0049] In order to cool down the scanning welding head, cold water is injected into the water inlet channel 81, and the cold water passes through the first channel 83, the second channel 84, the fourth channel 86, the third channel 85 and the water outlet channel 82 in sequence, and is discharged to the outside through the water outlet channel 82, which can quickly take away the heat, cool down the mounting shell 1, the galvanometer mounting seat 2 and the galvanometer system 3, achieve a cooling effect, and ensure stable operation of the system; by designing the first channel 83, the second channel 84, the fourth channel 86, and the third channel 85 to be closer to the mounting cavity 21, the heat generated in the system can be taken away more quickly.

[0050] The surface of the galvanometer mounting base 2 is coated with a black oxide absorption film. The black oxide absorption film on the inner wall of the galvanometer mounting base 2 can absorb the laser reflected to the inner wall of the mounting cavity 21, so that the heat is transferred to the galvanometer mounting base 2, making it easier for cold water to take away the heat in the galvanometer mounting base 2.

[0051] The implementation principle of a laser galvanometer system and a high-power laser scanning welding head in the embodiment of the present application is as follows: regarding the pasting of the first lens 43 and the mounting portion 422, the side edge of the first lens 43 is glued to the mounting groove 4221 by glue. When there is no shielding on the surrounding side of the mounting groove 4221, the scattered laser will irradiate the surrounding side of the mounting groove 4221, and the heat transmitted by the laser will heat the glue; by arranging a protective platform 4222 and a protrusion 4223 on the mounting portion 422, when the light scattered by the incident laser or the light reflected by the mirror after the surface of the welded metal workpiece melts is directed to the first lens 43, the light scattered by the laser is irradiated on the protective platform 4222 and the protrusion 4223, and the protective platform 4222 and the protrusion 4223 block the laser, so that the laser cannot be directly irradiated on the glue, thereby preventing the glue from being damaged by excessive temperature and affecting the connection between the first lens 43 and the first mirror frame 42.

[0052] Example 2 The difference from Example 1 is that, referring to Figure 10-13A cooling tube 9 is arranged along the outer side of the first through groove 24 in the installation cavity 21, and the first lens 43 and the baffle plate 423 can pass through the cooling tube 9. The cooling tube 9 is flat and perpendicular to the plane where the baffle plate 423 is located; both ends of the cooling tube 9 are connected to a circular tube 91, and the circular tube 91 is located below the boss 29, and the end of the circular tube 91 away from the cooling tube 9 is bent toward the boss 29; the bottom surface of the boss 29 is provided with a socket 291 for inserting the ends of the two circular tubes 91 respectively, and two fifth flow channels 88 are arranged in the boss 29, one end of the fifth flow channel 88 is connected to the second flow channel 84, and the two sockets 291 are respectively connected to the two fifth flow channels 88 through the sixth flow channel 89; the second flow channel 84 is located between the two fifth flow channels 88. The part of the closed; the cooling tube 9 is installed on the inner wall of the installation cavity 21 through the connecting component 93.

[0053] A second sealing ring 92 is embedded in the insertion hole 291 , and the end surface of the circular tube 91 presses the second sealing ring 92 against the inner wall of the insertion hole 291 ; the second sealing ring 92 seals the connection between the circular tube 91 and the sixth flow channel 89 .

[0054] In order to better dissipate heat, an exposed cooling pipe 9 is arranged in the installation cavity 21. When cold water enters the second flow channel 84, the cold water in the second flow channel 84 enters the fifth flow channel 88 closest to the first flow channel 83, and then enters the sixth flow channel 89, the circular tube 91, the cooling pipe 9, and then flows back to another circular tube 91, another sixth flow channel 89, another fifth flow channel 88, and finally enters the second flow channel 84; due to the exposed cooling pipe 9, the installation cavity 21 can be better cooled, making the cooling effect more significant.

[0055] The side of the cooling tube 9 close to the first lens 43 is flush with the side of the shielding plate 423 close to the first lens 43; the flat cooling tube 9 can shield the end of the first motor 41. When scattered and reflected lasers are directed toward the end of the first motor 41, the cooling tube 9 shields the lasers. At the same time, the heat generated by the laser irradiating the cooling tube 9 can be taken away by the cold water in the cooling tube 9.

[0056] The connecting assembly 93 includes a first connecting block 931, a fixing plate 932, a second connecting block 933, a third connecting block 934, a first connecting piece 935 and a second connecting piece 936; the first connecting block 931 is integrally formed on the bottom surface of the boss 29, the side surface of the first connecting block 931 is flush with the side surface of the boss 29, the two ends of the fixing plate 932 are respectively sleeved on the circumference of the two round tubes 91, the round tubes 91 are fixedly connected to the fixing plate 932, and the top surface of the fixing plate 932 is provided with a slot 9321 for inserting the first connecting block 931, and the inner wall of the slot 9321 is connected to the first connecting block 931. The side of the connecting block 931 is fitted together, and the fixing plate 932 is connected to the bottom surface of the first connecting block 931 by screws; the second connecting block 933 and the third connecting block 934 are both integrally formed on the top surface of the installation cavity 21, the second connecting block 933 is located on one side of the cooling pipe 9, and the third connecting block 934 is located on the other side of the cooling pipe 9, the first connecting piece 935 and the second connecting piece 936 are connected to the outer side surface of the cooling pipe 9, the first connecting piece 935 is connected to the bottom surface of the second connecting block 933 by screws, and the second connecting piece 936 is connected to the bottom surface of the third connecting block 934 by screws.

[0057] Insertion strips 9322 are connected to the inner walls on both sides of the slot 9321, and strip grooves 9311 for inserting the insertion strips 9322 are provided on the symmetrical side surfaces of the first connection block 931; when the first connection block 931 is inserted into the slot 9321, the insertion strips 9322 are aligned with the strip grooves 9311, so that the first connection block 931 and the fixing plate 932 can be stably plugged in, and the connected fixing plate 932 and the first connection block 931 are more stable.

[0058] When the cooling tube 9 needs to be installed, align the two round tubes 91 with the two sockets 291, align the first connecting block 931 with the slot 9321, insert the two round tubes 91 into the socket 291, insert the first connecting block 931 into the slot 9321, and connect the fixing plate 932 to the first connecting block 931 by screws, so that the installation position of the cooling tube 9 is accurate and will not affect the entry of the baffle plate 423 of the first lens 43; the first connecting piece 935 is connected to the second connecting piece 933 by screws, and the second connecting piece 936 is connected to the third connecting piece 934 by screws, so that the cooling tube 9 is more stable and will not shake due to the flow of water.

[0059] The implementation principle of a laser galvanometer system and a high-power laser scanning welding head in the embodiment of the present application is as follows: in order to better dissipate heat, an exposed cooling pipe 9 is arranged in the installation cavity 21. When cold water enters the second flow channel 84, the cold water in the second flow channel 84 enters the fifth flow channel 88 closest to the first flow channel 83, and then enters the sixth flow channel 89, the circular tube 91, the cooling pipe 9, and then flows back to another circular tube 91, another sixth flow channel 89, another fifth flow channel 88, and finally enters the second flow channel 84; due to the exposed cooling pipe 9, the installation cavity 21 can be better cooled, making the cooling effect more significant.

[0060] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A laser galvanometer system (3), characterized in that: The invention comprises a first galvanometer (4), wherein the first galvanometer (4) comprises a first motor (41), a first mirror frame (42) and a first lens (43), wherein the first mirror frame (42) comprises a connecting portion (421) and a mounting portion (422); the connecting portion (421) is connected to an output shaft of the first motor (41); the mounting portion (422) is connected to a side of the connecting portion (421) away from the first motor (41), and a mounting groove (422) for placing a side edge of the first lens (43) is provided on the side of the mounting portion (422) away from the connecting portion (421). 4221), the mounting groove (4221) runs through both ends of the mounting portion (422), and one side edge of the first lens (43) is adhered in the mounting groove (4221); the side of the mounting portion (422) away from the connecting portion (421) is connected to two protective platforms (4222), and the two protective platforms (4222) are respectively located on both sides of the mounting groove (4221); the two ends of the mounting portion (422) are connected to two protrusions (4223), and the two protrusions (4223) are respectively located on both sides of the mounting groove (4221).

2. A laser galvanometer system (3) according to claim 1, characterized in that: The laser galvanometer system (3) further comprises a second galvanometer (5), wherein the second galvanometer (5) comprises a second motor (51), a second mirror frame (52) and a second lens (53); the second mirror frame (52) is connected to an output shaft of the second motor (51), and the second lens (53) is mounted on the second mirror frame (52).

3. A laser galvanometer system (3) according to claim 2, characterized in that: A first groove (4224) is provided on the sides of the two protective platforms (4222) that are close to each other, and a second groove (4225) is formed between the two protrusions (4223) at the same end.

4. A laser galvanometer system (3) according to claim 2, characterized in that: The length of the mounting groove (4221) is no greater than the length of a side edge of the first lens (43) located in the mounting groove (4221).

5. A laser galvanometer system (3) according to claim 2, characterized in that: The two side surfaces of the mounting portion (422) are chamfered surfaces (4226); the side surfaces of the protective platform (4222) that are away from each other and the side surfaces of the mounting portion (422) together form a chamfered surface (4226); the side surface of the protrusion (4223) that is away from the mounting portion (422) is an arc surface (4227).

6. A laser galvanometer system (3) according to claim 2, characterized in that: The first frame (42) further comprises a shielding plate (423), the end surface of the mounting portion (422) away from the first lens (43) is connected to the shielding plate (423), and the connecting portion (421) is connected to the side surface of the shielding plate (423) away from the mounting portion (422).

7. A laser galvanometer system (3) according to claim 6, characterized in that: The connecting portion (421) comprises a ring (4211) and a hoop (4212); one end of the ring (4211) is connected to the side of the baffle plate (423) away from the mounting portion (422); the end face of the ring (4211) away from the baffle plate (423) is provided with two symmetrical openings (4213); the end of the output shaft of the first motor (41) is inserted into the ring (4211); two hoops (4212) are provided, the two hoops (4212) are connected to the circumference of the ring (4211), the two hoops (4212) are located on both sides of the opening (4213), the two end faces of the two hoops (4212) are respectively aligned, and the two ends of the two hoops (4212) are detachably connected.

8. A laser galvanometer system (3) according to claim 2, characterized in that: The surfaces of the first mirror frame (42) and the second mirror frame (52) are both coated with a reflective coating material.

9. A high-power laser scanning welding head, suitable for installing the laser galvanometer system (3) as claimed in any one of claims 2 to 8, characterized in that: The invention comprises a mounting shell (1), a galvanometer mounting seat (2) and the galvanometer system (3); one of the side panels of the mounting shell (1) is provided with a light inlet (111), the bottom panel of the mounting shell (1) is provided with a light outlet (12), and two side panels adjacent to the side panel (11) of the light inlet (111) are mounting plates (13) of the manipulator; the galvanometer mounting seat (2) is mounted on the inner bottom surface of the mounting shell (1), and one side surface of the galvanometer mounting seat (2) is closely attached to the inner wall of the side panel (11) of the light inlet (111); the galvanometer mounting seat (2) is provided with a light outlet (12) and a light outlet (12) of the bottom panel; ... The bottom surface of the mirror mounting seat (2) is provided with a mounting cavity (21), and the mounting cavity (21) is connected to the light outlet (12); the side surface of the galvanometer mounting seat (2) close to the light inlet (111) is provided with a through hole (22) connected to the mounting cavity (21), and the light inlet (111) is connected to the through hole (22); the galvanometer system (3) is installed in the galvanometer mounting seat (2), and the galvanometer system (3) is used to reflect laser light incident from the light inlet (111) out of the light outlet (12).

10. A high-power laser scanning welding head according to claim 9, characterized in that: The top surface of the galvanometer mounting seat (2) is provided with an inclined first placement groove (23), and the bottom of the first placement groove (23) is provided with a first through groove (24) for the ends of the first lens (43), the first lens frame (42) and the first motor (41) to extend into the mounting cavity (21); a first connecting plate (6) is provided in the first placement groove (23), the first connecting plate (6) is connected to the first placement groove (23), and the first motor (41) passes through the first connecting plate (6); the top surface of the first connecting plate (6) is connected with a first fixing clamp (61), the inner peripheral surface of the first fixing clamp (61) is tightly attached to the peripheral surface of the first motor (41), and the two end surfaces of the first fixing clamp (61) are connected with first movable clamps (62), and the first movable clamp (62) is pressed tightly against the peripheral surface of the first motor (41).

11. A high-power laser scanning welding head according to claim 10, characterized in that: Two first positioning pins (63) are arranged on the side of the first connecting plate (6) away from the first fixing clamp (61), and two first positioning grooves (25) for inserting the two first positioning pins (63) are arranged on the bottom surface of the first placement groove (23); a first limiting ring (64) is connected to the circumference of the first motor (41), and the first limiting ring (64) is tightly attached to the top surfaces of the first fixing clamp (61) and the first movable clamp (62).

12. A high-power laser scanning welding head according to claim 9, characterized in that: A second placement groove (26) is provided on the side of the galvanometer mounting seat (2) away from the light entrance (111); a second through groove (27) is provided at the bottom of the second placement groove (26) for the ends of the second lens (53), the second lens frame (52) and the second motor (51) to extend into the mounting cavity (21); a second connecting plate (7) is provided in the second placement groove (26); the second connecting plate (7) is connected to the second placement groove (26); the second motor (51) passes through the second connecting plate (7); a second fixing clamp (71) is connected to the top surface of the second connecting plate (7); the inner peripheral surface of the second fixing clamp (71) is tightly attached to the peripheral surface of the second motor (51); second movable clamps (72) are connected to the two end surfaces of the second fixing clamp (71); the second movable clamps (72) are pressed tightly against the peripheral surface of the second motor (51).

13. A high-power laser scanning welding head according to claim 12, characterized in that: Two second positioning pins (73) are arranged on the side of the second connecting plate (7) away from the second fixing clamp (71), and two second positioning grooves (28) for inserting the two second positioning pins (73) are arranged on the bottom surface of the second placement groove (26); a second limiting ring (74) is connected to the circumference of the second motor (51), and the second limiting ring (74) is tightly attached to the top surfaces of the second fixing clamp (71) and the second movable clamp (72).

14. The high-power laser scanning welding head according to claim 10, characterized in that: A water inlet channel (81) and a water outlet channel (82) are provided in the side plate (11) of the light inlet (111), and the water inlet channel (81) and the water outlet channel (82) are connected to the top surface of the side plate (11) of the light inlet (111); a first channel (83) is provided in the galvanometer mounting seat (2), and the end of the first channel (83) is connected to the bottom of the water inlet channel (81); a top corner of the mounting cavity (21) away from the side plate (11) of the light inlet (111) is connected to a boss (29), and a second channel (84) is provided in the galvanometer mounting seat (2), and the second channel (84) passes through the boss (29), and one end of the second channel (84) is connected to the boss (29). The first flow channel (83) is away from the end of the water inlet flow channel (81); a third flow channel (85) is arranged in the galvanometer mounting seat (2), and the end of the third flow channel (85) is connected to the bottom of the water outlet flow channel (82); a fourth flow channel (86) is arranged in the galvanometer mounting seat (2), one end of the fourth flow channel (86) is connected to the end of the second flow channel (84) away from the first flow channel (83), and the other end of the fourth flow channel (86) is connected to the end of the third flow channel (85) away from the water outlet flow channel (82); the first flow channel (83), the second flow channel (84), the fourth flow channel (86) and the third flow channel (85) are arranged around the mounting cavity (21).

15. A high-power laser scanning welding head according to claim 14, characterized in that: A cooling tube (9) is arranged in the installation cavity (21) along the outer side of the first through groove (24), and the first mirror frame (42) can pass through the cooling tube (9), and the cooling tube (9) is flat; both ends of the cooling tube (9) are connected to round tubes (91), and the round tubes (91) are located below the boss (29), and the end of the round tube (91) away from the cooling tube (9) is bent toward the boss (29); the bottom surface of the boss (29) is provided with a space for the two round tubes ( 91) ends are respectively inserted into the sockets (291), two fifth flow channels (88) are arranged in the boss (29), one end of the fifth flow channel (88) is connected to the second flow channel (84), and the two sockets (291) are respectively connected to the two fifth flow channels (88) through the sixth flow channel (89); the second flow channel (84) is located between the two fifth flow channels (88) and is partially closed; the cooling pipe (9) is installed on the inner wall of the installation cavity (21) through the connecting component (93).

16. A high-power laser scanning welding head according to claim 15, characterized in that: The connecting assembly (93) comprises a first connecting block (931), a fixing plate (932), a second connecting block (933), a third connecting block (934), a first connecting sheet (935) and a second connecting sheet (936); the first connecting block (931) is connected to the bottom surface of the boss (29); the two ends of the fixing plate (932) are respectively sleeved on the circumference of the two circular tubes (91); the circular tubes (91) are fixedly connected to the fixing plate (932); and the top surface of the fixing plate (932) is provided with a thread for connecting the first connecting block (931). 1) is inserted into the slot (9321), the fixing plate (932) is connected to the bottom surface of the first connecting block (931); the second connecting block (933) and the third connecting block (934) are both connected to the top surface of the mounting cavity (21), the first connecting piece (935) and the second connecting piece (936) are connected to the outer side surface of the cooling pipe (9), the first connecting piece (935) is connected to the bottom surface of the second connecting block (933), and the second connecting piece (936) is connected to the bottom surface of the third connecting block (934).

Images