A collimated annular galvanometer laser welding method

Abstract

The invention relates to the field of welding technology, and more specifically to a collimated annular galvanometer laser welding method; the method comprises the following steps: inserting a laser output point light source into a QBH interface of a welding converter, and introducing the point light source into the welding converter; the laser output point light source is converted into a parallel light beam through a collimation module in the welding converter and incident on an X / Y reflective lens of a digital galvanometer; the light is transmitted to a focusing field lens through reflection of the X / Y lens, so as to converge into a point ring light spot on the surface of a material to be welded; the X / Y lens is driven to move, and the focused point ring light spot moves accordingly, so as to complete the welding of the material; the invention has the beneficial effects of: by converting an ordinary point light spot into a point ring laser, welding spatter can be effectively reduced, the welding yield rate can be improved, and a good weld appearance can be obtained, and the cost is relatively low, and the invention can be widely used in the precision welding of lithium battery top covers, shells, battery cells, modules and other types of metal materials.

Description

Technical Field

[0001] The invention relates to the technical field of welding, and more specifically to a collimated annular galvanometer laser welding method. Background Art

[0002] With the rapid development of new energy lithium batteries, the yield and safety requirements for lithium battery production are getting higher and higher. Laser welding is one of the core processes in the production of lithium batteries, and its welding yield directly affects the quality and safety of battery products. In order to ensure that the lithium battery welding yield is infinitely close to 100%, it is particularly important to match the appropriate welding process with a highly matched optical system; using two beams of light spots to combine for welding, in which the light spot with high energy density is used for deep melting welding, and the light spot with low energy density is used for auxiliary heating, which can effectively reduce welding spatter, improve welding yield and obtain a good weld appearance. Based on this idea, the fiber-semiconductor composite welding and fiber annular spot welding methods are widely used in the industry. Composite welding is a 915nm wavelength semiconductor laser output fiber and another 1080nm wavelength fiber laser output fiber are coupled together through the same composite welding head for welding. It has problems such as complex structure, difficult optical path debugging, and inconvenient integration in galvanometer lens welding;

[0003] A circumferential welding head for laser clamping spot welding similar to patent number CN201610169754.9 includes a laser welding head, a "C"-shaped clamp and a clamping cylinder. The laser welding head is vertically fixed to the upper opening of the "C"-shaped clamp, and the clamping cylinder drives the connection "C"-shaped clamp to open and close. The laser welding head is mechanically coaxially connected to the QBH joint, collimator, focusing lens and focusing adjustment head from top to bottom. The collimator is installed on the eccentric sleeve by the collimator lens. The center of the collimator lens deviates from the mechanical axis of the laser welding head. The rotary motor drives the connection eccentric sleeve, and the eccentric sleeve rotates around the mechanical axis. In the present invention, since the center of the collimator lens deviates from the mechanical axis of the laser welding head, the collimator lens rotates around the mechanical axis following the rotation of the eccentric sleeve. The laser beam leaves a ring-shaped welding line on the workpiece, expands the weld scar area, improves the welding quality, and has a simple equipment structure and low investment cost.

[0004] Therefore, there are shortcomings in the existing technical solutions, and it is impossible to transform the ordinary point spot into a point ring laser, so as to effectively reduce welding spatter, improve welding yield and obtain a good weld appearance. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the existing technology by changing the ordinary point light spot into a point ring laser, thereby effectively reducing welding spatter, improving the welding yield and obtaining a good weld appearance, and the cost is relatively low, and it can be widely used in the precision welding of lithium battery top covers, shells, battery cells, modules and other types of metal materials.

[0006] To this end, the technical solution adopted is that a collimated annular galvanometer laser welding method of the present invention comprises the following steps:

[0007] S1: Insert the laser output point light source into the QBH interface of the welding converter, and introduce the point light source into the welding converter;

[0008] S2: The laser output point light source is transformed into a parallel light beam through the collimation module in the welding converter and incident on the X / Y reflective lens of the digital galvanometer;

[0009] S3: The light is transmitted to the focusing field lens through reflection from the X / Y lens, thereby converging into a dot ring light spot on the surface of the material to be welded;

[0010] S4: Drive the X / Y lens to move, and the focus ring spot moves accordingly, thus completing the welding of the material.

[0011] Preferably, the S1 comprises:

[0012] S11: installing an aconic lens, a collimating lens and a focusing lens in the collimating module in sequence;

[0013] S12: By adjusting the distance between the driving cone lens, the collimating lens and the focusing lens in the collimating module.

[0014] Preferably, the S2 comprises:

[0015] S21: By adjusting the energy of the point ring laser, the distance between the conical lens and the incident point light source can be changed, and the energy of the center point laser and the outer ring laser can be changed.

[0016] Preferably, the S12 comprises:

[0017] S121: By adjusting the distance between the axle lens and the incident laser output point light source, the ratio of light distributed in the central area and the peripheral area of ​​the axle lens is adjusted.

[0018] Preferably, the axle lens, collimating lens and focusing lens are all provided with lens fixtures, and the lens fixtures are laterally limited and slidable in the collimating module.

[0019] Preferably, the lens clamp includes a center ring clamping platform, a clamping slide, a symmetrical clamping disk, a clamping push rod, a pushing clamping bolt and a rotating gear, one end of the center ring clamping platform is fixed in one of the clamping slides, the other end of the center ring clamping platform is rotatably connected in the other clamping slide, the lower end of the center ring clamping platform is plugged with a symmetrical clamping disk, the clamping disk is fixed on the clamping push rod, the upper end of the clamping push rod slides in a limited position in the clamping slide, and the clamping push rod is connected to the clamping slide by pushing the clamping bolt.

[0020] Preferably, the clamping slide slides in a limited position in the alignment module, a rotating gear is fixed on the clamping slide, the rotating gear is meshed with a displacement rack, the displacement rack is connected to the displacement bolt by threaded cooperation, the displacement bolt is rotatably set in the side insertion frame, the side insertion frame is longitudinally inserted in the side frame, and the side frame is fixed to the side end of the alignment module; the side insertion frame and the side frame are adjusted by threaded cooperation of the side bolts.

[0021] Preferably, a threaded seat is fixed on the lens fixture for clamping the conical lens and the focusing lens, and the threaded seat is connected to the positive and negative bolts through positive and negative threads. The positive and negative bolts rotate in the collimation module. The positive and negative bolts drive the external displacement screw through the meshing of bevel gears, and the external displacement screw rotates in the collimation module.

[0022] Preferably, a center rack is fixed to the lower end of the lens clamp for clamping the collimating lens, and the center rack is engaged with a transmission center displacement sliding screw, and the center displacement sliding screw rotates in the collimating module.

[0023] Preferably, the focusing field lens of S4 is provided with a pressing wheel rotatably arranged along the track;

[0024] The track pressing wheel includes an adjustment frame, forward and reverse adjustment bolts, two threaded seats, a hole arc half wheel, an insert arc half wheel, a pressure slot, a key hole shaft, a key slot and a key shaft. One end of the adjustment frame is rotatably connected to the focusing field lens, and the other end of the adjustment frame is rotatably locked on the focusing field lens through a thread.

[0025] A forward and reverse adjusting bolt is rotatably arranged on the adjusting frame, and the forward and reverse adjusting bolts are respectively connected to two threaded seats through forward and reverse thread matching, and the lower ends of the two threaded seats are respectively rotatably connected to the key hole shaft and the key shaft, and the key hole shaft and the key shaft slide on the two ends of the adjusting frame respectively, and a hole arc half wheel and an insert arc half wheel are respectively fixed on the key hole shaft and the key shaft, and the insert arc half wheel is inserted into the pressure slot on the hole arc half wheel, and the key shaft is inserted and slid in the key slot on the key hole shaft. Beneficial Effects

[0026] The collimated ring module can transform the ordinary light spot into a point ring laser, and the power distributed on the point spot and the ring spot can be adjusted;

[0027] The use of collimated annular galvanometer welding can effectively reduce welding spatter, improve welding yield, and obtain a good weld appearance;

[0028] The device has a simple structure and relatively low cost.

[0029] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in this application document.

[0030] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0032] Figure 1 is a schematic structural diagram of a welding converter of the present invention;

[0033] Figure 2 It is a schematic diagram of the overall structure of the present invention in the second direction;

[0034] Figure 3 It is a schematic diagram of the structure of the collimating annular galvanometer of the present invention;

[0035] Figure 4 This is a schematic diagram of the structure of the collimation module of the present invention. Figure 1 ;

[0036] Figure 5 This is a schematic diagram of the structure of the collimation module of the present invention. Figure 2 ;

[0037] Figure 6 It is a structural schematic diagram of the use of the displacement rack of the present invention;

[0038] Figure 7 It is a schematic diagram of the use structure of the lens clamp of the present invention;

[0039] Figure 8 is a schematic structural diagram of the lens drive of the present invention;

[0040] Fig. 9 It is a schematic diagram of the use structure of the center displacement sliding screw of the present invention;

[0041] Fig.10 is a schematic structural diagram of the lens clamp of the present invention;

[0042] Fig.11 It is a schematic diagram of the structure of the wheel pressing along the track of the present invention;

[0043] Fig.12 It is a schematic diagram of the structure of the hole arc half wheel of the present invention;

[0044] Fig.13 It is a schematic structural diagram of the arc-shaped half wheel of the present invention;

[0045] Fig.14 This is a welding effect diagram of a lithium battery explosion-proof valve according to the present invention;

[0046] Fig.15It is a schematic diagram of the light intensity distribution diagram of the point ring light spot of the present invention.

[0047] In the figure: point light source 1; conical lens 2; collimator 3; focusing lens 4; spot ring light spot 5; digital galvanometer 6; collimator module 7; QBH interface 8; spot ring laser energy adjustment button 9; focusing field lens 10; connection port 11; side frame 12; side insertion frame 13; side bolt 14; displacement bolt 15; displacement rack 16; outer displacement screw 17; center displacement sliding screw 18; lens clamp 19; center circular clamping platform 20; clamping slide 21; symmetrical clamping plate 22; clamping push rod 23; push clamping bolt 24; rotating gear 25; threaded seat 26; center rack 27; pressing wheel 28 along the track; adjusting frame 29; positive and negative adjustment bolt 30; two threaded seats 31; hole arc half wheel 32; insert arc half wheel 33; press slot 34; key hole shaft 35; keyway 36; key shaft 37. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "middle", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0050] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Specific implementation method 1

[0053] like Figure 1 — Fig.10 As shown, a collimated annular galvanometer laser welding method comprises the following steps:

[0054] S1: insert the laser output point light source 1 into the QBH interface 8 of the welding converter, and introduce the point light source 1 into the welding converter;

[0055] S2: The laser output point light source 1 is transformed into a parallel light beam through the collimation module 7 in the welding converter and incident on the X / Y reflection lens of the digital galvanometer 6;

[0056] S3: The light is transmitted to the focusing field lens 10 through reflection by the X / Y lens, so as to converge into a point ring light spot 5 on the surface of the material to be welded;

[0057] S4: driving the X / Y lens to move, and the focusing point ring spot 5 moves accordingly, thereby completing the welding of the material.

[0058] The working principle and beneficial effects of this embodiment are as follows: Laser welding is an efficient welding method that uses a laser beam to melt and connect metal materials together;

[0059] Laser generation: Generates high-energy, highly focused laser beams through lasers;

[0060] Focusing: Using lenses or mirrors to focus the laser so that its energy density is high enough to generate enough heat during the welding process;

[0061] Melting: The focused laser beam irradiates the surface of the metal material to be welded, locally heats it and melts it instantly to form a molten pool;

[0062] Molten pool control: By controlling the energy and position of the laser beam, the temperature and shape of the molten pool are adjusted to achieve precise welding results;

[0063] Solidification: When the laser beam stops working, the molten metal quickly cools and solidifies to form a weld and achieve the connection of metal materials;

[0064] Laser welding has the advantages of high energy density, low heat input, fast welding speed, and small deformation. It is suitable for occasions with high requirements on welding quality and efficiency, such as automobile manufacturing, aerospace, electronic equipment, etc. At the same time, laser welding also requires strict control of welding parameters and operating techniques to ensure welding quality and stability;

[0065] The point light spot is transformed into a point ring laser by passing through the aconic lens 2, the collimating lens 3 and the focusing lens 4. The light beam passing through the central area of ​​the aconic lens 2 remains unchanged, and converges into a central point light spot 5 after passing through the collimating lens 3 and the focusing lens 4. The light beam passing through the periphery of the aconic lens 2 converges into an outer ring light spot 5 after passing through the collimating lens 3 and the focusing lens 4.

[0066] The principle of collimated ring is to transform the point light spot into a point ring laser by combining the aconic lens 2, collimating lens 3 and focusing lens 4. Among them, the light beam passing through the central area of ​​the aconic lens 2 does not change, and converges into a central point light spot 5 after passing through the collimating lens 3 and focusing lens 4, and the light beam passing through the periphery of the aconic lens 2 converges into an outer ring light spot 5 after passing through the collimating lens 3 and focusing lens 4;

[0067] By adjusting the distance between the aconic lens 2 and the incident laser source point light source 1, the proportion of light distributed in the central area and the peripheral area of ​​the aconic lens 2 is adjusted, thereby changing the strength of the central point spot and the outer ring light power. Using this device to obtain a point ring spot for welding can achieve good welding results. Specific implementation method 2

[0069] like Figure 1 — Fig.13 As shown, a collimated annular galvanometer laser welding method, the S1 comprises:

[0070] S11: sequentially installing the aconic lens 2, the collimating lens 3 and the focusing lens 4 in the collimating module 7;

[0071] S12 : The distances among the axicon lens 2 , the collimating lens 3 and the focusing lens 4 are adjusted in the collimating module 7 .

[0072] The working principle and beneficial effects of this embodiment are as follows: by adjusting and rotating the conical lens 2, the collimating lens 3 and the focusing lens 4 in the collimating module 7, the angle of direct radiation can be changed. When the lens is used for too long or needs to be adjusted to a suitable angle, the relative displacement between the displacement and the angle can be adjusted, thereby promoting light absorption and improving the use effect; thereby effectively protecting the lens in use. Specific implementation method three

[0074] like Figure 1 — Fig.10 As shown, a collimated annular galvanometer laser welding method, the S2 comprises:

[0075] S21: The distance between the conical lens 2 and the incident point light source 1 can be changed by adjusting the point ring laser energy knob, thereby changing the energy of the center point laser and the outer ring laser.

[0076] The working principle and beneficial effects of this embodiment are as follows: after the laser output head is inserted into the QBH interface 8, the point laser emitted by the laser is converted into a parallel beam through the collimation module 7 and incident on the X / Y reflective lens of the digital galvanometer. The light is transmitted to the focusing field lens through the reflection of the X / Y lens, thereby converging into a point ring light spot on the surface of the material. When the external control system drives the X / Y lens to move, the focusing point ring light spot moves accordingly, thereby completing the welding of the material.

[0077] The energy adjustment knob of the point ring laser can be used to change the distance between the conical lens and the incident point light source, thereby changing the energy of the center point laser and the outer ring laser, making welding debugging convenient. Specific implementation method four

[0079] like Figure 1 — Fig.10 As shown, a collimated annular galvanometer laser welding method, the S12 comprises:

[0080] S121: By adjusting the distance between the axle lens 2 and the incident laser output point light source 1, the ratio of light distributed in the central area and the peripheral area of ​​the axle lens is adjusted. Specific implementation method five

[0082] like Figure 1 — Fig.10 As shown, a collimating annular galvanometer laser welding method is provided, wherein the conical lens 2, the collimating lens 3 and the focusing lens 4 are all provided with a lens fixture 19, and the lens fixture 19 is laterally limited and slidable in the collimating module 7.

[0083] The working principle and beneficial effects of this embodiment are: by adjusting the lens clamp 19, effective adjustment can be performed without unpacking the device to avoid light, thereby ensuring operation during welding, improving the operation of the entire device, and performing all-round adjustment. Specific implementation method 6

[0085] like Figure 1 — Fig.10As shown, a collimated annular galvanometer laser welding method, the lens fixture 19 includes a center ring clamping platform 20, a clamping slide 21, a symmetrical clamping disk 22, a clamping push rod 23, a pushing clamping bolt 24 and a rotating gear 25, one end of the center ring clamping platform 20 is fixed in one of the clamping slides 21, the other end of the center ring clamping platform 20 is rotatably connected in the other clamping slide 21, the lower end of the center ring clamping platform 20 is plugged with a symmetrical clamping disk 22, the clamping disk 22 is fixed on the clamping push rod 23, the upper end of the clamping push rod 23 is limitedly slid in the clamping slide 21, and the clamping push rod 23 is connected to the clamping slide 21 by pushing the clamping bolt 24.

[0086] The working principle and beneficial effects of this embodiment are as follows: the lens is set in the central ring clamping platform 20, and the clamping bolt 24 is pushed by rotating on the clamping slide 21, thereby advancing the symmetrical clamping disk 22 and the clamping push rod 23, so that the symmetrical clamping disk 22 is deeply clamped to clamp the lens to prevent displacement and thus achieve fixation. The surface of the clamping disk 22 is smooth to avoid scratching the lens. Specific implementation method seven

[0088] like Figure 1 — Fig.10 As shown, a method for laser welding of a collimating annular galvanometer is provided, wherein the clamping slide 21 is limitedly slid in the collimating module 7, a rotating gear 25 is fixed on the clamping slide 21, the rotating gear 25 is meshed with a displacement rack 16, the displacement rack 16 is connected to a displacement bolt 15 by threaded fitting, the displacement bolt 15 is rotatably arranged in a side insert frame 13, the side insert frame 13 is longitudinally inserted in a side frame 12, and the side frame 12 is fixed to the side end of the collimating module 7; the side insert frame 13 and the side frame 12 are adjusted by threaded fitting of a side bolt 14.

[0089] The working principle and beneficial effects of this embodiment are as follows: by rotating the adjusting side bolt 14 in the collimation module 7, a displacement change occurs between the side insert frame 13 and the side frame 12, and then the displacement rack 16 can be adjusted to engage with the rotating gear 25, and then the displacement bolt 15 is rotated to displace the displacement rack 16 and drive the rotating gear 25 to rotate, so that the center ring clamping table 20 that clamps the lens is offset, thereby changing the angle of the lens, thereby achieving angle adjustment, and then achieving the use of adjustment and adaptation during use. Specific implementation method eight

[0091] like Figure 1 — Fig.10 As shown, a collimating annular galvanometer laser welding method is provided, wherein a threaded seat 26 is fixed on the lens fixture 19 for clamping the conical lens 2 and the focusing lens 4, and the threaded seat 26 is connected to the positive and negative bolts through the positive and negative threads, and the positive and negative bolts rotate in the collimating module 7, and the positive and negative bolts are engaged through the bevel gears to drive the external displacement screw 17, and the external displacement screw 17 rotates in the collimating module 7.

[0092] The working principle and beneficial effects of this embodiment are as follows: by adjusting and rotating the external displacement screw 17, the positive and negative bolts drive the lens fixture 19 with the lens 2 and the focusing lens 4 to shift, thereby causing the conical lens 2 and the focusing lens 4 at both ends to shift relative to each other, thereby achieving adjustment of the entire use range and adjusting the relative displacement. Specific implementation method nine

[0094] like Figure 1 — Fig.10 As shown, a collimating annular galvanometer laser welding method is provided, wherein a center rack 27 is fixed to the lower end of the lens fixture 19 for clamping the collimating mirror 3, and the center rack 27 is engaged with a transmission center displacement sliding screw 18, and the center displacement sliding screw 18 rotates in the collimating module 7.

[0095] The working principle and beneficial effects of this embodiment are as follows: in coordination with the adjustment of the range, the sliding screw 18 is rotated to displace the center, and then the lens clamp 19 that clamps the collimator 3 is displaced by engaging the center rack 27, thereby achieving displacement adjustment of the position of the collimator 3, and adjusting the distance between the two ends, thereby achieving overall adaptive adjustment. Specific implementation method 10

[0097] like Figure 1 — Fig.13 As shown, a collimated annular galvanometer laser welding method, the focusing field lens 10 of S4 is provided with a pressing wheel 28 rotating along the track;

[0098] The track pressing wheel 28 includes an adjustment frame 29, a forward and reverse adjustment bolt 30, two threaded seats 31, a hole arc half wheel 32, an insert arc half wheel 33, a press slot 34, a key hole shaft 35, a key slot 36 and a key shaft 37. One end of the adjustment frame 29 is rotatably connected to the focusing field lens 10, and the other end of the adjustment frame 29 is rotatably locked on the focusing field lens 10 through a thread.

[0099] A forward and reverse adjusting bolt 30 is rotatably provided on the adjusting frame 29, and the forward and reverse adjusting bolt 30 is respectively connected to two threaded seats 31 through forward and reverse thread matching. The lower ends of the two threaded seats 31 are respectively rotatably connected to the key hole shaft 35 and the key shaft 37, and the key hole shaft 35 and the key shaft 37 slide on the two ends of the adjusting frame 29 respectively. The key hole shaft 35 and the key shaft 37 are respectively fixed with a hole arc half wheel 32 and an insert arc half wheel 33, and the insert arc half wheel 33 is inserted into the pressure slot 34 on the hole arc half wheel 32, and the key shaft 37 is inserted and slid in the key groove 36 on the key hole shaft 35.

[0100] The working principle and beneficial effects of this embodiment are as follows: during welding, the adjustment frame 29 on the focusing field lens 10 is rotated to align with the welding position, and the locking bolt is rotated to fix the position of the adjustment frame 29; the molten pool at the welding position is extruded and assembled through the hole arc half wheel 32 and the plug arc half wheel 33, and the positive and negative adjustment bolts 30 are rotated before welding, and then the two threaded seats 31 are relatively displaced through the positive and negative thread matching, so that the hole arc half wheel 32 and the plug arc half wheel 33 are relatively displaced under the action of the pressing slot 34, the key hole shaft 35, the key slot 36 and the key shaft 37, and are convenient for rotation along the welding track; and then the arc wheel composed of the hole arc half wheel 32 and the plug arc half wheel 33 is adjusted to extrude the arc width, so that the molten pool generated during the laser welding process is extruded along the track with a specified width and arc style, so as to achieve welding concentration during the welding process while ensuring the welding effect of the appearance.

[0101] The above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims

1. A collimated annular galvanometer laser welding method, characterized in that: The following steps are involved: S1: inserting the laser output point light source (1) into the QBH interface (8) of the welding converter, and introducing the point light source (1) into the welding converter; S2: The laser output point light source (1) is transformed into a parallel light beam through the collimation module (7) in the welding converter and incident on the X / Y reflective lens of the digital galvanometer (6); S3: The light is transmitted to the focusing field lens (10) through reflection through the X / Y lens, so as to converge into a dot ring light spot (5) on the surface of the material to be welded; S4: driving the X / Y lens to move, and the focusing ring spot (5) moves accordingly, thereby completing the welding of the material; The S1 includes: S11: installing an aconic lens (2), a collimating lens (3) and a focusing lens (4) in sequence in the collimating module (7); S12: adjusting the distance between the driving conical lens (2), the collimating lens (3) and the focusing lens (4) on the collimating module (7); The aconic lens (2), the collimating lens (3) and the focusing lens (4) are all provided with a lens fixture (19), and the lens fixture (19) is laterally limited and slidable in the collimating module (7); The lens clamp (19) comprises a central annular clamping platform (20), a clamping slide (21), a symmetrical clamping disk (22), a clamping push rod (23), a pushing clamping bolt (24) and a rotating gear (25), one end of the central annular clamping platform (20) is fixed in one of the clamping slides (21), the other end of the central annular clamping platform (20) is rotatably connected in the other clamping slide (21), the lower end of the central annular clamping platform (20) is plugged into the symmetrical clamping disk (22), the clamping disk (22) is fixed on the clamping push rod (23), the upper end of the clamping push rod (23) is limitedly slid in the clamping slide (21), and the clamping push rod (23) is connected to the clamping slide (21) by pushing the clamping bolt (24); The clamping slide (21) rotatably connected to the central annular clamping platform (20) is limitedly slid in the collimation module (7); a rotating gear (25) is fixed on the clamping slide (21) fixed to the central annular clamping platform (20); the rotating gear (25) is meshed with a displacement rack (16); the displacement rack (16) is connected to a displacement bolt (15) by threaded fit; the displacement bolt (15) is rotatably arranged in the side insertion frame (13); the side insertion frame (13) is longitudinally inserted in the side frame (12); the side frame (12) is fixed to the side end of the collimation module (7); the side insertion frame (13) and the side frame (12) are adjusted by threaded fit of the side bolts (14); A threaded seat (26) is fixed to the lens fixture (19) for clamping the conical lens (2) and the focusing lens (4); the threaded seat (26) is connected to the positive and negative bolts through positive and negative threads; the positive and negative bolts rotate in the collimation module (7); the positive and negative bolts drive the external displacement screw (17) through bevel gear meshing; and the external displacement screw (17) rotates in the collimation module (7); A central rack (27) is fixed to the lower end of the lens clamp (19) for clamping the collimator (3), and the central rack (27) is engaged with a transmission central displacement sliding screw (18), and the central displacement sliding screw (18) rotates in the collimator module (7).

2. A collimated annular galvanometer laser welding method according to claim 1, characterized in that: The S2 includes: S21: By adjusting the energy of the point ring laser, the distance between the conical lens (2) and the incident point light source (1) can be changed, thereby changing the energy of the center point laser and the outer ring laser.

3. The collimated annular galvanometer laser welding method according to claim 1, characterized in that: The S12 includes: S121: By adjusting the distance between the conical lens (2) and the incident laser output point light source (1), the ratio of light distributed in the central area and the peripheral area of ​​the conical lens is adjusted.

4. A collimated annular galvanometer laser welding method according to claim 1, characterized in that: The focusing field lens (10) of the S4 is provided with a pressing wheel (28) rotatably arranged along the track; The track pressing wheel (28) comprises an adjustment frame (29), a forward and reverse adjustment bolt (30), two threaded seats (31), a hole arc half wheel (32), an insertion arc half wheel (33), a pressing slot (34), a key hole shaft (35), a key slot (36) and a key shaft (37); one end of the adjustment frame (29) is rotatably connected to the focusing field lens (10), and the other end of the adjustment frame (29) is rotatably locked to the focusing field lens (10) through a thread; A forward and reverse adjusting bolt (30) is rotatably provided on the adjusting frame (29), and the forward and reverse adjusting bolt (30) is respectively connected to two threaded seats (31) through forward and reverse thread matching, and the lower ends of the two threaded seats (31) are respectively rotatably connected to the key hole shaft (35) and the key shaft (37), and the key hole shaft (35) and the key shaft (37) are respectively slidable on the two ends of the adjusting frame (29), and the key hole shaft (35) and the key shaft (37) are respectively fixed with a hole arc half wheel (32) and an insert arc half wheel (33), and the insert arc half wheel (33) is inserted into a pressure slot (34) on the hole arc half wheel (32), and the key shaft (37) is inserted and slidable in a key slot (36) on the key hole shaft (35).

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