Laser welding matching assembly and laser welding equipment

Abstract

The utility model relates to a laser welding matching component and laser welding equipment, which comprise a mouth part and a sleeve part sleeved outside the mouth part, the sleeve part is used for being connected with a laser head, and the laser welding matching component is characterized in that one of the mouth part and the sleeve part is provided with a boss, and the other of the mouth part and the sleeve part is provided with a mounting groove which comprises a first groove section and a second groove section which are communicated with each other; the end, away from the second groove section, of the first groove section is open, the end, away from the first groove section, of the second groove section is closed, the boss can enter the first groove section through the opening of the first groove section and can move to the second groove section so that the boss can be hooked in the second groove section, and installation of the mouth part on the sleeve part is completed. When the mouth needs to be cleaned or replaced, the boss reversely moves along the tracks of the second groove section and the first groove section, and then disassembly can be completed. The mouth part and the sleeve part are easier to mount and dismount, the sleeve part cannot be wasted due to disconnection between the sleeve part and the laser head when the mouth part is dismounted, the service life of the sleeve part is effectively prolonged, and the use cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing, and more specifically, to a laser welding component and laser welding equipment. Background Technology

[0002] Lithium-ion batteries have become the preferred batteries for portable electronic products, electric vehicles, and energy storage due to their advantages such as high capacity density, high specific energy, and long cycle life, and are being used more and more widely.

[0003] In the battery manufacturing process, laser welding is required, and the laser requires a copper sleeve and a copper nozzle. The copper sleeve is threaded to the laser head, and the copper nozzle is threaded to the copper sleeve.

[0004] The copper nozzle is affected by the high temperature of the laser, and the surface of the copper head is prone to producing highly adhesive oxide "welding slag". Therefore, the copper nozzle needs to be replaced and cleaned every day to ensure that the copper head will not deform due to long-term high temperature. The threaded connection is not easy to disassemble, and the replacement time is 3 to 5 minutes, which wastes manpower and time.

[0005] Furthermore, the locking and loosening directions between the copper sleeve and the laser head are consistent with those between the copper nozzle and the copper sleeve. The threads connecting the copper nozzle and the copper sleeve are prone to jamming due to high-temperature weld slag buildup. Over time, loosening the copper nozzle can easily pull the copper sleeve off the laser head. Since the copper sleeve has a much longer lifespan than the copper nozzle, this results in waste of the copper sleeve. Utility Model Content

[0006] The purpose of this utility model is to provide a laser welding accessory component that makes it easier to replace the copper nozzle while avoiding the waste of the copper sleeve caused by its removal.

[0007] The purpose of this invention is also to provide a laser welding device in which the nozzle and sleeve are easier to install and remove, and the sleeve is not wasted due to the disconnection between the sleeve and the laser head when the nozzle is removed, thus reducing the cost of use.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.

[0009] This utility model provides a laser welding accessory component, which includes a nozzle and a sleeve fitted over the nozzle. The sleeve is used to connect to a laser head. The characteristic feature is that one of the nozzle and the sleeve has a boss, and the other has a mounting groove. The mounting groove includes a first groove segment and a second groove segment that are connected. The first groove segment is open at one end away from the second groove segment, and the second groove segment is closed at one end away from the first groove segment. The boss can enter the first groove segment through the opening and can move to the second groove segment to hook the boss into the second groove segment.

[0010] In some embodiments of this application, the first groove segment extends along the direction of the central axis, which is the central axis of the mouth or the sleeve provided with the mounting groove;

[0011] The second groove segment and the first groove segment are set at an acute angle.

[0012] In some embodiments of this application, the acute angle is greater than or equal to 45 degrees and less than or equal to 60 degrees.

[0013] In some embodiments of this application, the distance between the two endpoints of the projection of the movable travel trajectory of the boss within the second slot onto the central axis is greater than the width of the second slot.

[0014] In some embodiments of this application, the mouth portion is provided with the protrusion;

[0015] The sleeve is provided with the mounting groove.

[0016] In some embodiments of this application, both the mouth portion and the sleeve portion have a rotationally symmetrical structure;

[0017] Both the boss and the mounting groove are provided in at least two.

[0018] In some embodiments of this application, the sleeve includes a small-diameter section and a first large-diameter section connected together;

[0019] The inner diameter of the smaller diameter segment is smaller than the inner diameter of the first larger diameter segment;

[0020] The first large-diameter section is provided with the boss or the mounting groove.

[0021] In some embodiments of this application, the inner wall of the first large-diameter section is provided with a first stepped groove, and the first large-diameter section is provided with the boss or the mounting groove on the side wall corresponding to the first stepped groove.

[0022] When the boss is hooked in the second groove, there is a gap between the mouth and the bottom of the first stepped groove.

[0023] In some embodiments of this application, the sleeve further includes a second large-diameter section;

[0024] The inner diameter of the smaller diameter segment is smaller than the inner diameter of the second larger diameter segment, and the smaller diameter segment is connected between the first larger diameter segment and the second larger diameter segment.

[0025] The second large diameter section is used to connect to the laser head.

[0026] In some embodiments of this application, the inner wall of the second large diameter section is provided with a second stepped groove, and the inner wall of the second large diameter section corresponding to the second stepped groove is also provided with an internal thread;

[0027] The internal thread is used for threaded connection with the laser head.

[0028] In some embodiments of this application, the sleeve further includes a first transition section and a second transition section;

[0029] The first transition section connects the small diameter section and the first large diameter section, and the inner diameter of the first transition section gradually increases from one end connected to the small diameter section to the other end connected to the first large diameter section;

[0030] The second transition section connects the small diameter section and the second large diameter section, and the inner diameter of the second transition section gradually increases from one end connected to the small diameter section to the other end connected to the second large diameter section.

[0031] In some embodiments of this application, the nozzle includes a mounting section and a reduced diameter section connected together;

[0032] The mounting section is provided with the boss or the mounting groove;

[0033] The inner diameter of the reduced diameter section is smaller than that of the mounting section, and the inner diameter of the reduced diameter section gradually decreases from one end connected to the mounting section to the other end away from the mounting section.

[0034] This utility model also provides a laser welding device, which includes the laser welding supporting components described in any of the above embodiments.

[0035] As can be seen from the above technical solution, the embodiments of this utility model have at least the following advantages and positive effects:

[0036] In the laser welding assembly of this utility model embodiment, the boss can enter the first groove through the opening of the first groove, then move along the trajectory of the first and second grooves into the second groove, and hook into the second groove to complete the installation of the nozzle on the sleeve, so that subsequent laser welding processes can be performed.

[0037] When the mouthpiece needs to be cleaned or replaced, the boss moves along the track of the second groove to the first groove, disengaging the hook connection between the boss and the second groove. Then, the boss moves along the track of the first groove and comes out of the opening of the first groove, completing the disassembly of the mouthpiece. Finally, the cleaned mouthpiece or a new mouthpiece can be installed.

[0038] The installation and removal of the nozzle and sleeve are more convenient, improving the maintenance efficiency of the nozzle, reducing labor costs, and the connection between the sleeve and the laser head will not be damaged during the removal of the nozzle, avoiding waste of the sleeve and effectively improving the service life of the sleeve.

[0039] In the laser welding equipment of this utility model embodiment, the nozzle and sleeve are easier to install and disassemble, and the sleeve will not be wasted due to the disconnection between the sleeve and the laser head when the nozzle is disassembled, thus reducing the cost of use. Attached Figure Description

[0040] The various objectives, features, and advantages of this invention will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0041] Figure 1 This is a three-dimensional structural schematic diagram of a laser welding assembly according to an exemplary embodiment.

[0042] Figure 2 yes Figure 1 A three-dimensional structural diagram of the middle mouth section.

[0043] Figure 3 yes Figure 2 A sectional view.

[0044] Figure 4 yes Figure 1 A three-dimensional structural diagram of the middle sleeve.

[0045] Figure 5 yes Figure 4 A sectional view.

[0046] The reference numerals in the attached drawings are explained as follows: 1. Nozzle; 11. Mounting section; 111. Boss; 12. Reduced diameter section; 2. Sleeve; 21. Small diameter section; 22. First large diameter section; 221. Mounting groove; 2211. First groove section; 2212. Second groove section; 222. First stepped groove; 23. Second large diameter section; 231. Second stepped groove; 24. First transition section; 25. Second transition section. Detailed Implementation

[0047] Although the present invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to what is described herein.

[0048] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.

[0049] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of this invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, these directional indications also change accordingly.

[0050] The copper nozzle is affected by the high temperature of the laser, and the surface of the copper head is prone to producing highly adhesive oxide "welding slag". Therefore, the copper nozzle needs to be replaced and cleaned every day to ensure that the copper head will not deform due to long-term high temperature. If a threaded connection is used, it is not easy to disassemble and the replacement time is 3 to 5 minutes, which wastes manpower and time.

[0051] Furthermore, the locking and loosening directions between the copper sleeve and the laser head are consistent with those between the copper nozzle and the copper sleeve. The threads connecting the copper nozzle and the copper sleeve are prone to jamming due to high-temperature weld slag accumulation. Over time, loosening the copper nozzle can easily pull the copper sleeve off the laser head. Since the copper sleeve has a much longer lifespan than the copper nozzle, this results in waste. Experiments show that the copper nozzle can be used for 5500 welding cycles at a time, and after 6-8 cycles of grinding and reuse, it tends to become unusable. The copper sleeve can be used for 45000 welding cycles, but its threads are prone to deformation due to weld slag accumulation.

[0052] To address the issues of difficult installation and removal of the copper nozzle and wasted copper bushings, please refer to [link / reference needed]. Figures 1 to 5 This utility model provides a laser welding accessory assembly, which includes a nozzle 1 and a sleeve 2 sleeved outside the nozzle 1. The sleeve 2 is used to connect to the laser head.

[0053] One of the mouth part 1 and the sleeve part 2 is provided with a boss 111, and the other of the two is provided with a mounting groove 221. The mounting groove 221 includes a first groove segment 2211 and a second groove segment 2212 that are connected. The first groove segment 2211 is open at one end away from the second groove segment 2212, and the second groove segment 2212 is closed at one end away from the first groove segment 2211. The boss 111 can enter the first groove segment 2211 through the opening of the first groove segment 2211, and can move to the second groove segment 2212 to hook the boss 111 into the second groove segment 2212.

[0054] With the above structural design, the boss 111 can enter the first groove 2211 through the opening of the first groove 2211, and then move along the trajectory of the first groove 2211 and the second groove 2212 to enter the second groove 2212, and hook into the second groove 2212 to complete the installation of the mouth 1 on the sleeve 2, so that the subsequent laser welding process can be carried out.

[0055] When it is necessary to clean or replace the mouthpiece 1, the boss 111 moves along the trajectory of the second groove 2212 to the first groove 2211, releases the hook connection between the boss 111 and the second groove 2212, and then the boss 111 moves along the trajectory of the first groove 2211 to disengage from the opening of the first groove 2211, thus completing the disassembly of the mouthpiece 1. Finally, the cleaned mouthpiece 1 or the new mouthpiece 1 can be installed.

[0056] The installation and removal of the nozzle 1 and the sleeve 2 are more convenient, improving the maintenance efficiency of the nozzle 1, reducing labor costs, and the connection between the sleeve 2 and the laser head will not be damaged during the removal of the nozzle 1, avoiding waste of the sleeve 2 and effectively improving the service life of the sleeve 2.

[0057] It should be noted that the attached drawings only show an embodiment where the mouth part 1 has a boss 111 and the sleeve part 2 has a mounting groove 221. The sleeve part 2 is fitted over the mouth part 1, and the size of the sleeve part 2 is larger than that of the mouth part 1. By setting the mounting groove 221 on the sleeve part 2, the impact of opening the mounting groove 221 on the structural strength can be reduced to a certain extent, thereby improving the durability of the laser welding accessories.

[0058] In an embodiment not shown in the figure, the mouth part 1 is provided with a mounting groove 221, and the sleeve part 2 is provided with a boss 111.

[0059] The mouth part 1 and the sleeve part 2 may be made of materials including but not limited to copper, or other materials.

[0060] The first groove segment 2211 extends along the direction of the central axis, which is the central axis of the nozzle 1 or sleeve 2 with the mounting groove 221. The second groove segment 2212 and the first groove segment 2211 are set at an acute angle. The mounting groove 221 is sickle-shaped. When using the laser welding assembly, the central axes of both the nozzle 1 and the sleeve 2 are vertical. The upper end of the sleeve 2 is connected to the laser head. The mounting groove 221 is located at the lower end of the sleeve 2. The first groove segment 2211 is vertical, and its opening is located at the bottom of the sleeve 2. The boss 111 moves vertically upwards from the opening of the first groove segment 2211 into the first groove segment 2211, and then moves diagonally downwards into the second groove segment 2212. The second groove segment 2212 and the first groove segment 2211 are set at an acute angle. Unless a diagonally upward force is applied to the boss 111, it will not detach from the second groove segment 2212, allowing the boss 111 to be stably hooked within the second groove segment 2212. The inclined shape of the second groove segment 2212 ensures that the nozzle 1 is limited by force during the laser's up-down and left-right movements.

[0061] In this embodiment, the mouth part 1 is provided with a boss 111, and the sleeve part 2 is provided with a mounting groove 221, the first groove segment 2211 extending along the central axis of the sleeve part 2. Of course, in an embodiment not shown in the figure, the mouth part 1 is provided with a mounting groove 221, the sleeve part 2 is provided with a boss 111, and the first groove segment 2211 extending along the central axis of the mouth part 1.

[0062] The acute angle formed by the second groove segment 2212 and the first groove segment 2211 is greater than or equal to 45 degrees and less than or equal to 60 degrees. Through multiple implementation verifications, the acute angle is between 45 degrees and 60 degrees. The friction between the boss 111 and the second groove segment 2212 has a certain self-locking effect on the boss 111, improving the connection reliability of the mouth part 1 and the sleeve part 2.

[0063] The distance between the two endpoints of the projection of the movable travel trajectory of the boss 111 in the second groove 2212 onto the central axis is greater than the groove width of the second groove 2212. The second groove 2212 has sufficient length and tilt angle to ensure that the boss 111 is not easily dislodged in the second groove 2212.

[0064] Both the mouth part 1 and the sleeve part 2 have a rotationally symmetrical structure. In this embodiment, the cross-sections of both the mouth part 1 and the sleeve part 2 are circular. In other embodiments, the cross-sections of the mouth part 1 and the sleeve part 2 can also be arbitrary polygonal structures.

[0065] At least two bosses 111 and at least two mounting slots 221 are provided to ensure the reliable connection between the mouth part 1 and the sleeve part 2. Furthermore, since both the mouth part 1 and the sleeve part 2 have a rotationally symmetrical structure, the positions of at least two bosses 111 and at least two mounting slots 221 are also one-to-one. During installation or disassembly, the movement and rotation of the mouth part 1 relative to the sleeve part 2 allows all bosses 111 and mounting slots 221 to be installed or disassembled simultaneously, resulting in higher operational efficiency and greater convenience. In this embodiment, there are two bosses 111 and two mounting slots 221.

[0066] The sleeve 2 includes a small-diameter section 21 and a first large-diameter section 22 connected to each other. The inner diameter of the small-diameter section 21 is smaller than the inner diameter of the first large-diameter section 22. The first large-diameter section 22 is provided with a mounting groove 221, and the copper nozzle is provided with a boss 111. During laser welding, weld slag splashes from the center outwards. The connecting wall between the small-diameter section 21 and the first large-diameter section 22 can block or buffer the weld slag splashing, thereby protecting the laser and extending its lifespan. The upper end of the small-diameter section 21 can be used to connect the laser head, or other structures on the upper end of the small-diameter section 21 can be used to connect the laser head. In other embodiments, the first large-diameter section 22 is provided with a boss 111, and the copper nozzle is provided with a mounting groove 221.

[0067] The sleeve 2 also includes a second large-diameter section 23. The inner diameter of the small-diameter section 21 is smaller than the inner diameter of the second large-diameter section 23, and the small-diameter section 21 connects between the first large-diameter section 22 and the second large-diameter section 23. The second large-diameter section 23 is used to connect to the laser head. The inner diameter of the second large-diameter section 23 is larger than the inner diameter of the small-diameter section 21, making it easier to connect the laser head.

[0068] The inner wall of the first large-diameter section 22 is provided with a first stepped groove 222, and the side wall of the first large-diameter section 22 corresponding to the first stepped groove 222 is provided with an installation groove 221. When the boss 111 is hooked into the second groove section 2212, there is a gap between the mouth 1 and the bottom of the first stepped groove 222. This gap ensures that there is a certain distance between the bottom of the first stepped groove 222 and the upper end of the mouth 1, which helps to block some of the welding slag. Specifically, on the one hand, the welding slag that splashes upward is less likely to reach the upper end of the sleeve 2, ensuring that the welding slag will not stick to the sleeve 2. On the other hand, when the welding slag that has reached the top of the mouth 1 flows downward, there is still a certain distance for the mouth 1 to cool down, ensuring that the welding slag will not stick to the mouth 1. In other embodiments, the side wall of the first large-diameter section 22 corresponding to the first stepped groove 222 is provided with an installation groove 221, and the mouth 1 is provided with a boss 111.

[0069] The inner wall of the second large diameter section 23 is provided with a second stepped groove 231, and the inner wall of the second large diameter section 23 corresponding to the second stepped groove 231 is also provided with an internal thread, which is used for threaded connection with the laser head. The bottom of the groove 231 can block the laser head for positioning when the sleeve 2 is threadedly connected in place.

[0070] The sleeve 2 also includes a first transition section 24 and a second transition section 25. The first transition section 24 is connected between the small diameter section 21 and the first large diameter section 22, and the inner diameter of the first transition section 24 gradually increases from one end connected to the small diameter section 21 to the other end connected to the first large diameter section 22. The second transition section 25 is connected between the small diameter section 21 and the second large diameter section 23, and the inner diameter of the second transition section 25 gradually increases from one end connected to the small diameter section 21 to the other end connected to the second large diameter section 23.

[0071] The first transition section 24 makes the small diameter section 21 and the first large diameter section 22 transition smoothly, avoiding abrupt changes in structural dimensions that could affect structural strength. The first transition section 24 also makes the small diameter section 21 and the second large diameter section 23 transition smoothly, avoiding abrupt changes in structural dimensions that could affect structural strength. At the same time, the inner walls of the first transition section 24 and the second transition section 25 are inclined, which is more conducive to the sliding of welding slag and avoids welding slag adhesion.

[0072] In this embodiment, the nozzle 1 includes a mounting section 11 and a reduced-diameter section 12 connected to each other. The mounting section 11 has a boss 111, and the corresponding sleeve 2 has a mounting groove 221. The inner diameter of the reduced-diameter section 12 is smaller than that of the mounting section 11, and the inner diameter of the reduced-diameter section 12 gradually decreases from one end connected to the mounting section 11 to the other end away from the mounting section 11. The larger size of the mounting section 11 allows the sleeve 2 connected to the mounting section 11 to be made larger, which can accommodate more welding slag and prevent it from easily sticking. The lower end of the reduced-diameter section 12 is the laser welding position, and the inner wall of the reduced-diameter section 12 is inclined to make it easy for welding slag to fall off. In other embodiments, the mounting section 11 has a mounting groove 221, and the corresponding sleeve 2 has a boss 111.

[0073] The mouth part 1 has a uniform wall thickness, making it easier to form, and the wall thickness of the mouth part 1 is greater than or equal to 0.5mm, ensuring structural strength.

[0074] This utility model also provides a laser welding device, which adopts the laser welding accessories of any of the above embodiments. The nozzle 1 and sleeve 2 in the laser welding device are easier to install and disassemble, and the sleeve 2 is not wasted due to the disconnection between the sleeve 2 and the laser head when disassembling the nozzle 1, thus reducing the cost of use.

[0075] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A laser welding kit comprising a nozzle and a sleeve disposed over the nozzle, the sleeve for connection to a laser head, characterised in that, One of the mouth and the sleeve is provided with a boss, and the other is provided with a mounting groove, the mounting groove comprising a first groove section and a second groove section connected to each other, the first groove section being open at an end away from the second groove section, the second groove section being closed at an end away from the first groove section, the boss being capable of entering the first groove section through the opening of the first groove section and being capable of moving to the second groove section to hook the boss in the second groove section.

2. The laser welding kit of claim 1, wherein, The first groove section extends along a central axis of the mouth or the sleeve provided with the mounting groove; The second groove section and the first groove section are arranged at an acute angle.

3. The laser welding kit of claim 2, wherein, The acute angle is greater than or equal to 45 degrees and less than or equal to 60 degrees.

4. The laser welding kit of claim 2, wherein, A distance between two end points of a projection of a movable stroke locus of the boss in the second groove section on the central axis is greater than a groove width of the second groove section.

5. The laser welding kit of claim 1, wherein, The mouth is provided with the boss; The sleeve is provided with the mounting groove.

6. The laser welding kit of claim 1, wherein, The mouth and the sleeve are both rotationally symmetrical structures; The boss and the mounting groove are both provided with at least two.

7. The laser welding kit of claim 6, wherein, The sleeve comprises a small-diameter section and a first large-diameter section connected to each other; An inner diameter of the small-diameter section is smaller than an inner diameter of the first large-diameter section; The first large-diameter section is provided with the boss or the mounting groove.

8. The laser welding kit of claim 7, wherein, An inner wall of the first large-diameter section is provided with a first step groove, and a side wall of the first large-diameter section corresponding to the first step groove is provided with the boss or the mounting groove; When the boss is hooked in the second groove section, the mouth and a groove bottom of the first step groove have a gap.

9. The laser welding kit of claim 7, wherein, The sleeve further comprises a second large-diameter section; The inner diameter of the small-diameter section is smaller than an inner diameter of the second large-diameter section, and the small-diameter section is connected between the first large-diameter section and the second large-diameter section; The second large-diameter section is used to be connected to a laser head.

10. The laser welding kit of claim 9, wherein, An inner wall of the second large-diameter section is provided with a second step groove, and the inner wall of the second large-diameter section corresponding to the second step groove is further provided with an internal thread; The internal thread is used to be threadedly connected to the laser head.

11. The laser welding kit of claim 9, wherein, The sleeve further comprises a first transition section and a second transition section; The first transition section is connected between the small-diameter section and the first large-diameter section, and an inner diameter of the first transition section gradually increases from an end connected to the small-diameter section to an end connected to the first large-diameter section; The second transition section is connected between the small-diameter section and the second large-diameter section, and an inner diameter of the second transition section gradually increases from an end connected to the small-diameter section to an end connected to the second large-diameter section.

12. The laser welding kit of claim 1, wherein, The mouth comprises a mounting section and a reduced-diameter section connected to each other; The mounting section is provided with the boss or the mounting groove; An inner diameter of the reduced-diameter section gradually decreases from an end connected to the mounting section to an end away from the mounting section.

13. A laser welding apparatus characterized by comprising: A laser welding matched assembly comprising any one of claims 1-12.

Images