Tws earphone button cell battery tab laser connection equipment

Abstract

The application relates to the technical field of laser welding, and discloses a TWS earphone button cell tab laser connecting device which comprises a cabinet, a plurality of universal wheels are evenly distributed in a rectangular shape and are arranged at the lower end of the cabinet, a laser welding part is arranged at the rear side of the upper end of the cabinet, tool bases are symmetrically arranged at the front side of the laser welding part at the upper end of the cabinet, and rotary discs are rotatably arranged at the opposite ends of the two tool bases through main shaft boxes. The TWS earphone button cell tab laser connecting device can effectively solve the problems that, in the prior art, a laser welding device has some defects when welding tabs of button cells, first, the tab positioning precision is insufficient, the jig compatibility is general, the position consistency of flexible tabs needs to be improved, and the welding point is prone to deviation, virtual welding or even welding through the shell; and second, the single feeding capacity of the device is limited, the tool mounting and dismounting steps are complicated, and the device has a long idling waiting time.

Description

Technical Field

[0001] This invention relates to the field of laser welding technology, specifically to a laser connection device for the button battery tabs of TWS earphones. Background Technology

[0002] With the widespread use of TWS earphones, miniature button lithium batteries have become their core power supply component. The connection between the tabs and the battery casing is a critical process in battery manufacturing, and the connection quality directly affects the battery's internal resistance stability, cycle life, and safety performance. Currently, the industry generally uses laser welding technology to connect the tabs. The corresponding equipment completes the processing by relying on material loading and positioning, and laser welding. Due to its advantages of non-contact operation and high processing efficiency, it has been widely used.

[0003] In response to this, this application designs a laser connection device for the tabs of TWS earphone button batteries. Existing laser welding equipment has some shortcomings when welding tabs to button batteries. First, the positioning accuracy of the tabs is insufficient and the compatibility of the fixtures is generally poor. The consistency of the incoming position of flexible tabs needs to be improved, which can easily lead to weld point misalignment, incomplete welding, or even weld through the shell. Second, the single loading capacity of the equipment is limited, the tooling assembly and disassembly steps are cumbersome, multi-station parallel operation cannot be realized, the equipment idle waiting time is long, and the overall processing efficiency is difficult to meet the needs of mass production. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, this invention provides a laser connection device for button battery tabs in TWS earphones. This device effectively solves several deficiencies in existing laser welding equipment when welding tabs to button batteries. Firstly, the tab positioning accuracy is insufficient, and fixture compatibility is generally poor. The consistency of the incoming flexible tab position needs improvement, which can easily lead to weld point misalignment, incomplete welds, or even weld through the casing. Secondly, the equipment has a limited single-load capacity, the tooling assembly and disassembly steps are cumbersome, multi-station parallel operation is impossible, and the equipment idle time is long, making it difficult to meet the overall processing efficiency requirements for mass production.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a laser connection device for the button battery terminals of TWS earphones, comprising: The cabinet has several rectangular casters evenly distributed at the bottom. A laser welding section is located at the rear of the top of the cabinet. Tooling bases are symmetrically arranged on the left and right sides of the top of the cabinet in front of the laser welding section. Turntables are mounted on the opposite ends of the two tooling bases via the spindle box. A loading and fixing section is located between the two turntables. Locking sections are provided on the turntables. The laser welding section includes a gantry rack installed at the top of the cabinet, a mounting frame slidably mounted on the gantry rack via an electric slide rail, and a laser welding head mounted at the front end of the mounting frame via an electric slide rail. The loading and fixing part includes a tooling base plate located between two turntables on the left and right. The feeding end of the tooling base plate is detachably connected to a tooling cover plate. Marking grooves are opened at the opposite ends of the tooling base plate and the tooling cover plate. Oval magnetic plates are symmetrically installed on the feeding end of the tooling cover plate. Oval insertion holes are opened on the tooling base plate corresponding to the two oval magnetic plates on the left and right. Alignment holes are symmetrically opened on the blank areas of the tooling base plate and the tooling cover plate corresponding to the marking grooves on the left and right. Fixing groups are also jointly provided on the tooling base plate and the tooling cover plate.

[0006] Furthermore, the marking groove is designed in the shape of a convex character, and several alignment holes are provided. These alignment holes are evenly distributed in a rectangular shape. The alignment holes on the front and rear sides of the filling and fixing part are spaced relatively far apart in the left and right direction, while the alignment holes on the upper and lower sides of the filling and fixing part are spaced relatively far apart in the left and right direction.

[0007] Furthermore, the locking part includes a docking plate installed at one end of the turntable facing the filling and fixing part. A cross support frame is installed at one end of the docking plate facing the filling and fixing part. Several mounting cavities are evenly distributed in a circle on the cross support frame. Locking groups are provided on the cross support frame corresponding to several mounting cavities. The several locking groups are designed to correspond to the alignment holes on the same side.

[0008] Furthermore, the fixing assembly includes receiving cavities located on the tooling base plate corresponding to the marked slots. Several sets of receiving cavities are provided, and each set of receiving cavities consists of several linearly and evenly distributed receiving cavities. The receiving cavities are circular in design. A button battery body is placed on the inner wall of each receiving cavity. At the end of the tooling base plate away from the tooling cover plate, several receiving cavities are provided with a placement groove. The placement groove is composed of a U-shaped groove and a circular groove, and the placement groove is connected to the corresponding receiving cavity. An electrode body that is movably attached to the button battery body is placed on the inner wall of the placement groove. A magnet is embedded on the inner wall of the end of the U-shaped groove and the circular groove away from the tooling cover plate.

[0009] Furthermore, the corresponding magnet on the U-shaped groove of the tooling base plate is U-shaped, and two corresponding magnets are embedded on the circular groove of the tooling base plate. The two magnets are evenly distributed around the circumference, and the magnet on the circular groove is crescent-shaped.

[0010] Furthermore, the fixing assembly also includes a second placement slot located on the tooling cover plate corresponding to several receiving cavities. The second placement slot is also composed of a U-shaped slot and a circular slot, and the second placement slot is designed to face the opposite direction to the first placement slot. The inner wall of the second placement slot also has a tab body that is movably attached to the button battery body. The inner wall of the U-shaped slot and the circular slot away from the tooling base plate is embedded with a magnet.

[0011] Furthermore, the corresponding magnets on the U-shaped groove of the tooling cover plate are U-shaped, and two magnets are embedded on the circular groove of the tooling cover plate. The two magnets are evenly distributed around the circumference, and the magnets on the circular groove are crescent-shaped.

[0012] Furthermore, the fixing assembly also includes welding clearance holes located on the tooling base plate and the tooling cover plate, which are opened together for several receiving cavities. The welding clearance holes are located between two magnets. At the end of the tooling cover plate facing the tooling base plate, there are mating magnets installed on several U-shaped magnets on the placement slots. The mating magnets are also U-shaped.

[0013] Furthermore, the locking assembly includes L-shaped connecting rods symmetrically installed on the right-angled outer walls of adjacent sides of the cross support frame. On the outer wall of the L-shaped connecting rod near the corresponding mounting cavity, a limiting plate is fixedly sleeved on the inner side of the right angle. On the limiting plate located in one right-angle cavity, a first mounting sleeve plate is slidably sleeved on the outer wall of the corresponding L-shaped connecting rod via a tension spring. On the limiting plate located in the other right-angle cavity, a second mounting sleeve plate is slidably sleeved on the outer wall of the corresponding L-shaped connecting rod via a tension spring. Both the first mounting sleeve plate and the connecting screw sleeve are T-shaped structures.

[0014] Furthermore, the locking assembly also includes a connecting threaded sleeve that is symmetrically and integrally installed at the end of the first mounting plate that is further away from the corresponding limiting plate, and a bolt that is rotatably installed through the two connecting threaded sleeves at the end of the second mounting plate that is further away from the corresponding limiting plate, with the bolt threadedly connected to the corresponding connecting threaded sleeve.

[0015] The technical solution provided by this invention has the following advantages compared with the prior art: This invention provides a laser connection device for the button battery terminals of TWS earphones. During the alignment stage of the filling and fixing part, after the terminal body and button battery body are filled, the operator aligns and fastens the fixture cover plate to the fixture base plate. During this process, an oblong magnetic plate is inserted into the corresponding oblong insertion hole, and the fixture base plate and fixture cover plate are initially attached and fixed through magnetic attraction. Simultaneously, the marking grooves on the fixture base plate and fixture cover plate are completely aligned. Combined with the position reference of multiple sets of alignment holes, the positional accuracy of the fixture closing is ensured. Furthermore, this is achieved in conjunction with… Magnets are attracted to each other one-to-one, further enhancing the clamping stability of the tab body and ensuring that the welding avoidance holes and the welding positions of the button battery body are aligned one-to-one. This provides a precise processing channel for subsequent laser welding. Through the dual alignment design of the waist-shaped magnetic plate insertion and the marking groove alignment, the tooling can be quickly and accurately aligned when the cover is closed, avoiding the positional deviation caused by manual cover closing. After the cover is closed, the magnetic attraction further presses the tab body, which can effectively prevent defects such as incomplete welding and weld penetration caused by the tab displacement during the welding process, and improve the welding yield.

[0016] During the intermittent rotation and cyclic welding phase, after the single-sided welding of the current station is completed, the spindle boxes on the left and right tooling bases control the corresponding turntables to rotate 90 degrees. The two turntables will drive the cross support frame to rotate 90 degrees synchronously through the corresponding docking plates, bringing the next set of tooling base plates and tooling covers to the laser welding station. By repeating the above laser welding process, single-sided laser welding of the button battery body and electrode body in multiple sets of tooling base plates and tooling covers can be performed. The four sets of filling and fixing parts enter the welding station for processing in sequence through 90-degree intermittent rotation. Through the intermittent rotation multi-station processing mode, the welding process and the loading and unloading process can be carried out in parallel, eliminating the processing idle waiting time and greatly improving the overall efficiency of batch processing. The 90-degree precise rotation can ensure that the welding benchmark of each set of tooling is consistent, ensuring that the processing quality of the entire batch of products is uniform and stable. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure in an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram of the cabinet, laser welding unit, tooling base and turntable in an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the loading and fixing part, the docking plate, and the locking assembly in an embodiment of the present invention; Figure 4 This is a schematic diagram of the three-dimensional separation of the cross support frame and the locking assembly in an embodiment of the present invention; Figure 5 This is a schematic diagram of a partial three-dimensional cross-section of the cross support frame and locking assembly in an embodiment of the present invention; Figure 6 This is a schematic diagram of the three-dimensional separation of the tooling base plate, tooling cover plate, and locking assembly in an embodiment of the present invention; Figure 7 For the present invention Figure 6 A magnified structural diagram of section X in the middle; Figure 8 This is a front view structural diagram of the feeding end face of the tooling base plate in an embodiment of the present invention; Figure 9 This is a three-dimensional structural diagram of the tooling cover plate in an embodiment of the present invention; Figure 10This is a schematic diagram showing the partial three-dimensional separation of the tooling base plate, tooling cover plate, and fixing assembly in an embodiment of the present invention.

[0019] The labels in the diagram represent: 1. Cabinet; 2. Casters; 3. Laser welding section; 31. Gantry rack; 32. Mounting bracket; 33. Laser welding head; 4. Tooling base; 5. Turntable; 6. Loading and fixing section; 61. Tooling base plate; 62. Tooling cover plate; 63. Marking groove; 64. Oval magnetic plate; 65. Oval insertion hole; 66. Alignment hole; 67. Fixing assembly; 671. Receiving cavity; 672. Placement slot one; 673. 674. Magnet 1; 675. Placement slot 2; 676. Magnet 2; 677. Welding clearance hole; 678. Matching magnet; 79. Locking part; 70. Connecting plate; 71. Cross support frame; 72. Mounting cavity; 73. Locking assembly; 741. L-shaped connecting rod; 742. Limiting plate; 743. Mounting sleeve 1; 744. Connecting screw sleeve; 745. Mounting sleeve 2; 746. Bolt; 8. Button battery body; 9. Electrode body. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] The present invention will be further described below with reference to embodiments.

[0022] Example: Please see Figures 1-10 This invention provides a technical solution: a laser connection device for the button battery terminals of TWS earphones, comprising: The cabinet 1 has several rectangular casters 2 evenly distributed at the bottom. The upper rear side of the cabinet 1 is equipped with a laser welding part 3. The upper side of the cabinet 1 is symmetrically equipped with tooling bases 4 on the left and right sides in front of the laser welding part 3. The opposite ends of the two tooling bases 4 are mounted with turntables 5 through the spindle box. The two turntables 5 are equipped with a loading and fixing part 6 between them. The turntables 5 are equipped with locking parts 7. The laser welding section 3 includes a gantry frame 31 installed at the upper end of the cabinet 1. A mounting frame 32 is slidably mounted on the gantry frame 31 via an electric slide rail. A laser welding head 33 is mounted on the front end of the mounting frame 32 via an electric slide rail. The loading and fixing part 6 includes a tooling base plate 61 located between two left and right turntables 5. The feeding end of the tooling base plate 61 is detachably connected to a tooling cover plate 62. Marking grooves 63 are opened at the opposite ends of the tooling base plate 61 and the tooling cover plate 62. Oval magnetic plates 64 are symmetrically installed on the feeding end of the tooling cover plate 62. Oval insertion holes 65 are opened on the tooling base plate 61 corresponding to the two oval magnetic plates 64. Alignment holes 66 are symmetrically opened on the tooling base plate 61 and the tooling cover plate 62 in the blank areas corresponding to the marking grooves 63. Fixing groups 67 are also jointly provided on the tooling base plate 61 and the tooling cover plate 62.

[0023] The marking groove 63 is designed in the shape of a convex character. Several alignment holes 66 are provided. The alignment holes 66 are evenly distributed in a rectangular shape. The alignment holes 66 on the front and rear sides of the filling and fixing part 6 are spaced relatively far apart in the left and right direction, while the alignment holes 66 on the upper and lower sides of the filling and fixing part 6 are spaced relatively far apart in the left and right direction.

[0024] The locking part 7 includes a docking plate 71 installed at one end of the turntable 5 facing the filling and fixing part 6. A cross support frame 72 is installed at one end of the docking plate 71 facing the filling and fixing part 6. A plurality of mounting cavities 73 are evenly distributed in a circle on the cross support frame 72. A locking assembly 74 is provided on the cross support frame 72 corresponding to the plurality of mounting cavities 73. The plurality of locking assemblies 74 are respectively designed to correspond to the alignment holes 66 on the same side.

[0025] The fixing group 67 includes receiving cavities 671 located on the tooling base plate 61 corresponding to the marked groove 63. Several groups of receiving cavities 671 are provided, and each group of receiving cavities 671 consists of several linearly and evenly distributed receiving cavities 671. The receiving cavities 671 are circular in design. A button battery body 8 is placed on the inner wall of the receiving cavity 671. At the end of the tooling base plate 61 away from the tooling cover plate 62, several receiving cavities 671 are provided with placement grooves 672. Placement grooves 672 consist of U-shaped grooves and circular grooves, and placement grooves 672 are connected to the corresponding receiving cavities 671. An electrode body 9 is placed on the inner wall of the placement groove 672 and is movably attached to the button battery body 8. Magnets 673 are embedded on the inner wall of the end of the U-shaped groove and the circular groove away from the tooling cover plate 62. The electrode body 9 is magnetically connected to the corresponding magnet 673.

[0026] On the U-shaped groove of the tooling base plate 61, the corresponding magnet 673 is U-shaped. On the circular groove of the tooling base plate 61, two corresponding magnets 673 are embedded. The two magnets 673 are evenly distributed around the circumference, and the magnets 673 on the circular groove are crescent-shaped.

[0027] The fixing assembly 67 also includes a second placement groove 674 located on the tooling cover plate 62, which is opened in a number of receiving cavities 671. The second placement groove 674 is also composed of a U-shaped groove and a circular groove, and the second placement groove 674 is designed to face the opposite direction to the first placement groove 672. The inner wall of the second placement groove 674 is also equipped with a tab body 9 that is movably attached to the button battery body 8. The inner wall of the U-shaped groove and the circular groove away from the tooling base plate 61 is equipped with a second magnet 675. The tab body 9 in the second placement groove 674 is magnetically connected to the corresponding second magnet 675.

[0028] On the U-shaped groove of the tooling cover plate 62, the corresponding magnet 675 is U-shaped. On the circular groove of the tooling cover plate 62, two corresponding magnets 675 are embedded. The two magnets 675 are evenly distributed around the circumference, and the magnets 675 on the circular groove are crescent-shaped.

[0029] The fixing group 67 also includes welding clearance holes 676 that are commonly opened on the tooling base plate 61 and tooling cover plate 62 corresponding to a number of receiving cavities 671. The welding clearance holes 676 are located between two magnets 673. At the end of the tooling cover plate 62 facing the tooling base plate 61, a mating magnet 677 is installed on each of the U-shaped magnets 673 on the placement slots 672. The mating magnet 677 is also U-shaped.

[0030] The locking assembly 74 includes L-shaped connecting rods 741 symmetrically installed on the right-angled outer walls of the cross support frame 72 on both sides. On the outer wall of the L-shaped connecting rods 741 near the corresponding mounting cavity 73, a limiting plate 742 is fixedly sleeved on the inner side of the right angle. On the limiting plate 742 located in one right-angled cavity, a first mounting sleeve 743 is slidably sleeved on the outer wall of the corresponding L-shaped connecting rod 741 via a tension spring. On the limiting plate 742 located in the other right-angled cavity, a second mounting sleeve 745 is slidably sleeved on the outer wall of the corresponding L-shaped connecting rod 741 via a tension spring. The first mounting sleeve 743 and the connecting screw sleeve 744 are both T-shaped structures.

[0031] The locking assembly 74 also includes a connecting screw sleeve 744 located at the end of the first mounting plate 743 that is further away from the corresponding limiting plate 742, which is symmetrically and integrally installed with respect to the corresponding positioning hole 66. At the end of the second mounting plate 745 that is further away from the corresponding limiting plate 742, a bolt 746 is rotatably and throughly installed on both connecting screw sleeves 744, and the bolt 746 is threadedly connected to the corresponding connecting screw sleeve 744.

[0032] In practice: Firstly, this application utilizes a multi-station intermittent rotation structure formed by a loading and fixing part 6 and a magnetic fixing group 67 for high-precision batch laser welding of the button battery body 8 and the tab body 9. This avoids the problems of low welding yield and insufficient overall processing efficiency caused by insufficient tab positioning accuracy and limited single-load capacity of tooling in traditional button battery tab laser welding equipment. Specifically, the loading and fixing part 6 is used to place the button battery body 8 and the tab body 9, and the built-in multiple sets of magnetic fixing structures achieve precise positioning and stable clamping of the flexible tab body 9, preventing the tab body 9 from being damaged during the welding process. The offset and warping caused by weld point misalignment, incomplete welding, and weld penetration defects in the casing are prevented. The fit accuracy and welding position consistency between the tab body 9 and the battery casing are ensured. The locking part 7 is used to quickly and accurately clamp and firmly lock the multi-assembly filling and fixing part 6, ensuring that the tooling position is stable and there is no movement during the intermittent rotation process, and ensuring that the welding benchmark is consistent for the whole batch. The laser welding part 3 is used to drive the laser welding head 33 to move and weld along the preset path according to the preset welding process parameters after the station rotation and positioning is completed. In conjunction with the 90-degree intermittent rotation of the turntable 5, the tab body 9 and the button battery body 8 in the multi-station tooling are laser welded in sequence to realize the fully automated operation.

[0033] Based on the specifications of the button battery body 8 to be processed, the size of the tab body 9, and the welding precision requirements, the intermittent rotation rhythm of the turntable 5 and the travel path parameters of the laser welding head 33 need to be determined according to the production batch requirements. It should be noted that this application is equipped with four loading and fixing parts 6 and evenly distributed along the circumference of the cross support frame 72. The tooling can be quickly assembled and disassembled by the tension spring pre-positioning of the locking assembly 74 and the locking structure of the bolt 746. The laser welding part 3 can be adjusted horizontally and vertically by the electric slide rail on the gantry frame 31. The laser welding head 33 adopts a galvanometer laser cutting head. It does not need to be kept moving during the welding operation. Only when the processing area exceeds the effective width of the galvanometer, the overall position can be adjusted by the electric slide rail to complete the full area coverage. This ensures that the laser welding head 33 can accurately cover each welding avoidance hole 676 and stably complete the welding processing of the tab body 9 and the battery shell.

[0034] It should also be noted that the tooling base plate 61, tooling cover plate 62, magnet one 673, and magnet two 675 can together form a magnetic tab positioning mechanism. Through the dual action of slot limiting and magnetic fixation, the flexible tab body 9 is precisely attached to the end face of the button battery without the need for additional pressure blocks or adhesive fixation, thus avoiding indentations and deformation of the tab body 9. The welding avoidance hole 676 corresponds one-to-one with the welding position of the tab body 9, which can limit the laser action area and avoid laser mis-welding other areas of the battery casing. At the same time, in conjunction with the pressing action of the cover plate after it is closed, it further ensures the consistency of the tab welding position.

[0035] In the initial state, the laser welding head 33 is located in the initial reset position of the gantry frame 31, the turntable 5 is in the zero reference state, the four end faces of the cross support frame 72 correspond to the four working positions of up, down, front and back respectively, the mounting sleeve 1 743 and mounting sleeve 2 745 of the locking assembly 74 are in the initial retracted position under the action of the tension spring, the connecting screw sleeve 744 and the bolt 746 are not inserted into the corresponding mounting cavity 73, and will not hinder the subsequent installation of the filling and fixing part 6. The filling and fixing part 6 is not clamped onto the cross support frame 72.

[0036] During the equipment initialization and calibration phase, the operator first moves the cabinet 1 to the designated work position using the casters 2 and locks and brakes it. Then, the electric slide rails on the gantry frame 31, the laser welding head 33, and the drive spindle of the turntable 5 are reset and calibrated to confirm that the initial galvanometer coordinates of the laser welding head 33 match the 90-degree intermittent rotation parameters of the turntable 5. The output power, focal length, and galvanometer scanning path parameters of the laser welding head 33 are adjusted to ensure the positional accuracy of subsequent work position switching and welding processing.

[0037] During the tooling assembly and positioning stage, the operator removes the tooling base plate 61 and tooling cover plate 62 from the single assembly filling and fixing part 6. First, several tab bodies 9 are placed into the corresponding placement slots 1 672 and 2 674 in sequence. Using magnet 1 673 in placement slot 1 672 and magnet 2 675 in placement slot 2 674, the corresponding tab bodies 9 are magnetically attracted and fixed, thereby achieving the pre-filling of double-sided tab bodies 9 in a single tooling assembly. Next, the operator places several button battery bodies 8 into the corresponding receiving cavity 671 in sequence to complete the rough positioning of the battery cells, so that the welding end of the tab body 9 is accurately attached to the end face of the button battery body 8, avoiding the problem of displacement and warping of the flexible tab body 9. The magnetic tab positioning structure can achieve stable clamping of the ultra-thin flexible tab body 9 without pressure marks, avoiding the problem of weld point displacement caused by poor consistency of the tab material. The split tooling supports offline pre-filling and can be carried out in parallel with the welding process, effectively improving the overall processing efficiency.

[0038] During the alignment stage of the filling and fixing part 6, after the tab body 9 and the button battery body 8 are filled, the operator aligns and fastens the tooling cover 62 onto the tooling base plate 61. During this process, the oblong magnetic plate 64 is inserted into the corresponding oblong insertion hole 65, and the tooling base plate 61 and tooling cover 62 are initially attached and fixed through magnetic attraction. At the same time, the marking grooves 63 on the tooling base plate 61 and tooling cover 62 are completely aligned. With the position reference of multiple sets of alignment holes 66, the positional accuracy of the tooling cover is ensured. At this time, the magnet 677 and magnet one are used together. 673 will be attracted one by one, further enhancing the clamping stability of the tab body 9 and ensuring that the welding avoidance hole 676 and the welding position of the button battery body 8 are aligned one by one, providing a precise processing channel for subsequent laser welding. Through the double alignment design of the waist-shaped magnetic plate 64 and the marking groove 63, the tooling can be quickly and accurately aligned when the cover is closed, avoiding the positional deviation caused by manual cover closing. After the cover is closed, the magnetic attraction further presses the tab body 9, which can effectively prevent defects such as false welding and weld penetration caused by the tab displacement during the welding process, and improve the welding yield.

[0039] During the overall clamping and fixing stage of the multi-tool, after the tool base plate 61 and tool cover plate 62 are closed and aligned, they can be pushed to the corresponding installation position (installation cavity 73) of the cross support frame 72. Based on the difference in the spacing of the alignment holes 66 in the front and rear sides and the upper and lower sides of the filling and fixing parts 6, the four locking groups 74 on the cross support frame 72 need to be adapted to the alignment holes 66 with different spacings.

[0040] Specifically, the operator pushes the finished tooling base plate 61 and tooling cover plate 62 to the corresponding installation position on the cross support frame 72, placing them in the positioning position of the corresponding installation cavity 73. Then, the operator manually presses the first installation sleeve 743 and the second installation sleeve 745 closer together. They slide along the L-shaped connecting rod 741 towards the inside of the installation cavity 73, stretching the tension spring. During this process, the connecting threaded sleeve 744 will be inserted into the corresponding alignment hole 66. As the pressing continues, the second installation sleeve 745 will drive the corresponding bolt 746 to move synchronously towards the connecting threaded sleeve 744. Then, the bolt 746 is rotated at a uniform speed, allowing it to be screwed into the connecting threaded sleeve 744 through the threaded connection. The loading and fixing part 6 is firmly clamped onto the cross support frame 72 by the threaded locking force. Then, the operator follows the same operation to clamp the remaining three loading and fixing parts 6 to the four working end faces of the cross support frame 72 in sequence, thus completing the overall clamping of the four sets of material storage fixtures. The structure of open initial working position combined with manual pressing and locking allows the fixtures to be placed without obstruction, making the feeding operation smooth and convenient. The tension spring pre-positioning and bolt 746 locking ensure precise clamping and positioning and uniform and stable locking force, which can effectively prevent the fixtures from moving during rotation and welding. The cross support frame 72 can carry four sets of material storage fixtures at the same time, greatly increasing the single feeding capacity and reducing the idle time of equipment downtime waiting for materials.

[0041] In the single-sided laser welding stage at the first station, the spindle boxes on the left and right tooling bases 4 control the corresponding turntables 5 to rotate 90 degrees respectively. The two turntables 5 will drive the cross support frame 72 to rotate 90 degrees synchronously through the corresponding docking plate 71. The two cross support frames 72 will jointly drive multiple sets of tooling base plates 61 and tooling cover plates 62 to rotate 90 degrees synchronously until one set of tooling base plates 61 and tooling cover plates 62 is moved to the processing station directly below the laser welding section 3. Then, the electric slide rail on the gantry frame 31 controls the mounting frame 32 to adjust its position horizontally and vertically so that the effective area of ​​the galvanometer of the laser welding head 33 covers several welding avoidance holes 676 on the current tooling. During the welding process, the laser welding head 33 does not require follow-up movement. Laser welding of each weld point is completed by scanning with an internal galvanometer. The laser is emitted according to the preset process parameters and welded to the tab body 9 and the button battery body 8 through the welding avoidance hole 676. It should be noted that if the processing area exceeds the range of the galvanometer, the position of the mounting bracket 32 ​​can be adjusted again by the electric slide rail to complete the welding operation of the remaining area. The welding processing of all tab bodies 9 on one side of the current tooling is completed point by point. The galvanometer laser cutting head can complete high-speed scanning welding within the effective area without the need for the whole machine to move. The welding cycle is faster and the weld point consistency is higher. With the wide range of horizontal and vertical position adjustment, it can flexibly adapt to the welding area of ​​different tooling specifications, taking into account both processing efficiency and applicability.

[0042] During the intermittent rotation and cyclic welding phase, after the single-sided welding of the current station is completed, the spindle boxes on the left and right tooling bases 4 control the corresponding turntables 5 to rotate 90 degrees. The two turntables 5 will drive the cross support frame 72 to rotate 90 degrees synchronously through the corresponding docking plate 71, bringing the next set of tooling base plates 61 and tooling cover plates 62 to the laser welding station. Repeating the above laser welding process, the button battery body 8 and electrode body 9 in multiple sets of tooling base plates 61 and tooling cover plates 62 can be laser welded on one side. Through the 90-degree intermittent rotation, the four sets of filling and fixing parts 6 enter the welding station for processing in sequence. The intermittent rotation multi-station processing mode can realize the parallel development of the welding process and the loading and unloading process, eliminate the processing idle waiting time, and greatly improve the overall efficiency of batch processing. The 90-degree precise rotation can ensure that the welding benchmark of each set of tooling is consistent, ensuring that the processing quality of the entire batch of products is uniform and stable.

[0043] During the double-sided welding process, after all four sets of tooling on one side are welded, the spindle boxes on the left and right tooling bases 4 are used to control the corresponding turntables 5 to rotate 90 degrees in the opposite direction. The two turntables 5 will drive the cross support frame 72 to rotate 90 degrees in the opposite direction synchronously through the corresponding docking plate 71, so that the other side of the tooling base plate 61 and tooling cover plate 62 faces the laser welding head 33. The welding process of the other side tab body 9 and button battery body 8 is completed according to the same welding process. This realizes that the double-sided tab body 9 of a single tooling can be clamped and all welding processes can be completed at one time. During this process, the operator can unload and replace the tooling that has been welded while working at the welding station, realizing parallel operation of loading, welding and unloading. Through the flipping function of the turntable 5, the double-sided tab welding can be completed in one clamping of a single tooling without the need for secondary disassembly and repositioning, avoiding the positioning error caused by secondary clamping, reducing the frequency of tooling disassembly and reassembly, and further shortening the processing cycle of a single batch of products.

[0044] During the tooling unloading and finished product removal stage, after all the welding processes of the button battery body 8 and the tab body 9 in the multiple tooling base plates 61 and tooling cover plates 62 are completed, the two left and right turntables 5 are stopped. Then, while the operator presses the first mounting sleeve 743 and the second mounting sleeve 745, the bolt 746 is rotated in the opposite direction to release the thread lock. The first mounting sleeve 743 and the second mounting sleeve 745 move away from each other and reset under the action of the tension spring. The connecting screw sleeve 744 is simultaneously withdrawn from the alignment hole 66. By repeating the above steps, the multiple tooling base plates 61 and tooling cover plates 62 can be removed from the cross support frame 72 in sequence. Remove the fixture base plate 61 and fixture cover plate 62 from the top and separate them. After releasing the magnetic fixation, the welded button battery body 8 and tab body 9 can be easily taken out, completing a single batch processing cycle. The fixture disassembly operation of fixture base plate 61 and fixture cover plate 62 is simple and quick. After loosening bolt 746, the tension spring automatically resets and makes room, without the need for manual prying open the locking structure. The efficiency of picking up and putting down finished products is high. Moreover, the fixture adopts a modular design. By replacing fixture base plate 61 and fixture cover plate 62 of different specifications, it can be adapted to welding button battery tabs of different sizes, which has good fixture compatibility and expandability.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A laser connection device for the button battery tabs of TWS earphones, characterized in that, include: The cabinet (1) has several rectangular casters (2) evenly distributed at the bottom. The upper rear side of the cabinet (1) is equipped with a laser welding part (3). The upper side of the cabinet (1) is symmetrically equipped with tooling bases (4) on the left and right sides in front of the laser welding part (3). The opposite ends of the two tooling bases (4) are equipped with turntables (5) through the spindle box. The two turntables (5) are equipped with a filling and fixing part (6) between them. The turntables (5) are equipped with a locking part (7). The laser welding section (3) includes a gantry frame (31) installed at the upper end of the cabinet (1), a mounting frame (32) is slidably installed on the gantry frame (31) via an electric slide rail, and a laser welding head (33) is installed at the front end of the mounting frame (32) via an electric slide rail. The loading and fixing part (6) includes a tooling base plate (61) located between two turntables (5) on the left and right. The tooling base plate (61) is detachably connected to a tooling cover plate (62). Marking grooves (63) are opened at the opposite ends of the tooling base plate (61) and the tooling cover plate (62). Waist-shaped magnetic plates (64) are symmetrically installed on the left and right sides of the tooling cover plate (62). Waist-shaped insertion holes (65) are opened on the tooling base plate (61) corresponding to the two waist-shaped magnetic plates (64). Alignment holes (66) are symmetrically opened on the tooling base plate (61) and the tooling cover plate (62) in the blank areas corresponding to the marking grooves (63). Fixing groups (67) are also jointly provided on the tooling base plate (61) and the tooling cover plate (62).

2. The TWS earphone button battery electrode laser connection device according to claim 1, characterized in that: The marking groove (63) is designed in the shape of a convex character. Several alignment holes (66) are provided. The alignment holes (66) are evenly distributed in a rectangular shape. The alignment holes (66) on the front and rear sides of the filling and fixing part (6) are spaced relatively far apart in the left and right directions. The alignment holes (66) on the upper and lower sides of the filling and fixing part (6) are spaced relatively far apart in the left and right directions.

3. The laser connection device for the button battery terminals of TWS earphones according to claim 1, characterized in that: The locking part (7) includes a docking plate (71) installed at one end of the turntable (5) facing the filling and fixing part (6). A cross support frame (72) is installed at one end of the docking plate (71) facing the filling and fixing part (6). A number of installation cavities (73) are evenly distributed in a circle on the cross support frame (72). Locking groups (74) are provided on the cross support frame (72) corresponding to the number of installation cavities (73). The number of locking groups (74) are designed to correspond to the alignment holes (66) on the same side.

4. The TWS earphone button battery electrode laser connection device according to claim 1, characterized in that: The fixing group (67) includes a receiving cavity (671) located on the tooling base plate (61) corresponding to the marking groove (63). The receiving cavity (671) has several groups, and each group of receiving cavities (671) is composed of several receiving cavities (671) that are linearly and evenly distributed. The receiving cavity (671) is circular. The button battery body (8) is placed on the inner wall of the receiving cavity (671). The end of the tooling base plate (61) away from the tooling cover plate (62) corresponds to several receiving cavities (671), and each of them has a placement groove (672). The placement groove (672) is composed of a U-shaped groove and a circular groove, and the placement groove (672) is connected to the corresponding receiving cavity (671). The inner wall of the placement groove (672) is occupied by a tab body (9) that is movably attached to the button battery body (8). The inner wall of the U-shaped groove and the circular groove away from the tooling cover plate (62) is embedded with a magnet (673).

5. The laser connection device for the button battery terminals of TWS earphones according to claim 4, characterized in that: On the U-shaped groove of the tooling base plate (61), the corresponding magnet (673) is U-shaped. On the circular groove of the tooling base plate (61), two corresponding magnets (673) are embedded. The two magnets (673) are evenly distributed around the circumference, and the magnets (673) on the circular groove are crescent-shaped.

6. The TWS earphone button battery electrode laser connection device according to claim 5, characterized in that: The fixing group (67) also includes a second placement slot (674) on the tooling cover plate (62) corresponding to several receiving cavities (671). The second placement slot (674) is also composed of a U-shaped slot and a circular slot, and the second placement slot (674) and the first placement slot (672) are designed to face opposite directions. The inner wall of the second placement slot (674) is also equipped with a tab body (9) that is movably attached to the button battery body (8). The inner wall of the U-shaped slot and the circular slot away from the tooling base plate (61) is equipped with a second magnet (675).

7. The TWS earphone button battery electrode laser connection device according to claim 6, characterized in that: On the U-shaped groove of the tooling cover plate (62), the corresponding magnet two (675) is U-shaped. On the circular groove of the tooling cover plate (62), two corresponding magnet two (675) are embedded. The two magnet two (675) are evenly distributed around the circumference, and the magnet two (675) on the circular groove is crescent-shaped.

8. The TWS earphone button battery electrode laser connection device according to claim 6, characterized in that: The fixing group (67) also includes welding clearance holes (676) on the tooling base plate (61) and tooling cover plate (62) that are common to several receiving cavities (671). The welding clearance holes (676) are located between two magnets (673). At one end of the tooling cover plate (62) facing the tooling base plate (61), there are U-shaped magnets (673) on several placement slots (672), and each of them is equipped with a mating magnet (677). The mating magnet (677) is also U-shaped.

9. A laser connection device for the button battery terminals of a TWS earphone according to claim 3, characterized in that: The locking assembly (74) includes L-shaped connecting rods (741) symmetrically installed on the right-angled outer walls of the cross support frame (72) on both sides. On the outer wall of the L-shaped connecting rod (741) near the corresponding mounting cavity (73), a limiting plate (742) is fixedly sleeved on the inner side of the right angle. On the limiting plate (742) located in the right-angled cavity on one side, a first mounting sleeve plate (743) is slidably sleeved on the outer wall of the corresponding L-shaped connecting rod (741) by a tension spring. On the limiting plate (742) located in the right-angled cavity on the other side, a second mounting sleeve plate (745) is slidably sleeved on the outer wall of the corresponding L-shaped connecting rod (741) by a tension spring. The first mounting sleeve plate (743) and the connecting screw sleeve (744) are both T-shaped structures.

10. A laser connection device for the button battery terminals of a TWS earphone according to claim 9, characterized in that: The locking assembly (74) also includes a connecting threaded sleeve (744) located at the end of the first mounting plate (743) that is further away from the corresponding limiting plate (742), which is symmetrically and integrally installed with the corresponding positioning hole (66). At the end of the second mounting plate (745) that is further away from the corresponding limiting plate (742), both connecting threaded sleeves (744) are rotatably and through-mounted with bolts (746), and the bolts (746) are threadedly connected to the corresponding connecting threaded sleeves (744).

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