Integrated laser welding unit and laser welding equipment

Abstract

The utility model relates to the technical field of connecting piece welding equipment, in particular to an integrated laser welding unit and laser welding equipment, which comprises a pressure head structure and a driving structure used for driving the pressure head structure to move, the pressure head structure comprises a pressure head used for pressing a welding target material, and a light through hole for laser to pass through is arranged in the middle of the pressure head. The device is characterized by further comprising a pressure guiding structure, the pressure guiding structure comprises a pressure sensor connected with the pressure head structure, and when the driving structure drives the pressure head to abut against the welding target material, the welding target material applies counter-acting force to the pressure head so that the pressure sensor can be stressed and counter-acting force data can be output; the pressure sensor is electrically connected with electrical equipment for displaying and / or processing counter-acting force data; according to the utility model, an accurate pressure feedback mechanism is provided, and the pressing force of the pressing head can be fed back in real time, so that the welding operation condition is adjusted, and the reliability of the welding quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting piece welding equipment, in particular to an integrated laser welding unit and laser welding equipment. Background Art

[0002] In the lithium battery production process, the connection between the battery cells is achieved through connecting plates, and the setting of the connecting plates is laser welded by a connecting plate welding machine. Since the spacing and thickness of the poles of different battery modules are different, during laser welding, it is necessary to replace the various components of the connecting plate welding machine according to production needs to adapt to the welding of connecting plates of different specifications. This process is called welding changeover. Frequent welding changeovers not only consume labor time, but also easily wear out parts during disassembly and assembly, reducing welding accuracy. Therefore, in order to improve the efficiency of changeover, existing connecting plate welding machines use more integrated laser welding units. Compared with the traditional welding structure in which each component is relatively independent, the integrated laser welding unit does not need to manually disassemble and assemble each component during changeover, and has the advantage of fast changeover.

[0003] For example, the invention patent with the announcement number CN111112836A discloses an integrated laser continuous welding device and battery assembly equipment, wherein the integrated laser continuous welding device includes a downward pressure buffer device and a belt feeding device, a pressure head, a rotating device, a laser welding swing head and a cutting device driven by the downward pressure buffer device to move vertically. By integrating the various devices together, the above-mentioned integrated laser continuous welding device only needs to change the position of the entire welding device on the battery assembly equipment when changing the model, and the target part of the welding connection can be arbitrarily changed, thereby realizing rapid model change without disassembling and assembling parts.

[0004] However, such a device still has its limitations. In the above device, although the downward pressure buffer device can buffer the downward pressure action, it is not equipped with relevant pressure monitoring components, and cannot realize real-time monitoring of the pressure applied by the pressure head to the material during welding, making it difficult to ensure the reliability of each welding. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the purpose of the first aspect of the utility model is to provide an integrated laser welding unit with an accurate pressure feedback mechanism, which can provide real-time feedback on the clamping force of the pressure head and adjust the welding operation accordingly to ensure the reliability of the welding quality.

[0006] The second aspect of the utility model aims to provide a laser welding device.

[0007] According to the purpose of the first aspect of the utility model, the utility model provides an integrated laser welding unit, including a pressure head structure and a driving structure for driving the pressure head structure to move, the pressure head structure includes a pressure head for pressing a welding target material, and a light hole for passing laser light is provided in the middle of the pressure head. The unit is characterized in that it also includes a pressure guide structure, and the pressure guide structure includes a pressure sensor connected to the pressure head structure. When the driving structure drives the pressure head to abut against the welding target material, the welding target material applies a reaction force to the pressure head, so that the pressure sensor is subjected to force and outputs reaction force data; the pressure sensor is electrically connected to an electrical device for displaying and / or processing reaction force data.

[0008] Furthermore, the integrated laser welding unit provided by the utility model may also have the following characteristics: the pressure guide structure also includes a spring member for transmitting the reaction force, and the pressure sensor is connected to the pressure head structure via the spring member.

[0009] Furthermore, the integrated laser welding unit provided by the utility model may also have the following characteristics: the spring component includes a pressure guide shaft, a spring sleeved on the outside of the pressure guide shaft, and a limiting component provided on the pressure guide shaft for limiting the spring, one end of the spring is connected to the pressure head structure, and the other end is connected to the limiting component; the pressure sensor is connected to the limiting component.

[0010] Furthermore, the integrated laser welding unit provided by the utility model may also have the following characteristics: it also includes a guide structure for guiding the movement of the pressure head structure, the guide structure includes a guide rail mounting member provided with a guide rail and a slider provided on the guide rail; the guide rail mounting member is connected to the driving structure, and the slider is connected to the pressure head structure.

[0011] Furthermore, the integrated laser welding unit provided by the present invention may also have the following feature: a limiting member for limiting the movement limit of the slider is provided on the guide rail mounting member.

[0012] Furthermore, the integrated laser welding unit provided by the utility model may also have the following characteristics: the pressure head structure includes a pressure head mounting member, the pressure head mounting member includes a first mounting plate and a second mounting plate connected to each other, the first mounting plate and the second mounting plate are perpendicular to each other; the first mounting plate is connected to the driving structure, and the second mounting plate is connected to the pressure head.

[0013] Furthermore, the integrated laser welding unit provided by the present invention may also have the following characteristics: the pressure head and the second mounting plate are connected via an insulating member, and the insulating member includes an insulating plate sandwiched between the pressure head and the second mounting plate.

[0014] Furthermore, the integrated laser welding unit provided by the utility model may also have the following characteristics: corresponding threaded holes are provided on the second mounting plate, the insulating plate and the pressure head, and the second mounting plate, the insulating plate and the pressure head are connected by screws that are sequentially passed through the threaded holes; the insulating part also includes an insulating bushing arranged on the hole wall of the threaded hole.

[0015] Furthermore, the integrated laser welding unit provided by the utility model may also have the following characteristics: it also includes a dust extraction structure, and the dust extraction structure includes a dust extraction pipe arranged above the welding surface of the pressure head.

[0016] According to the purpose of the second aspect of the utility model, the utility model also provides a laser welding device, including a moving unit, and the integrated laser welding unit as described above, wherein the integrated laser welding unit is connected to the moving unit to achieve position movement.

[0017] The beneficial effects of the utility model are:

[0018] 1. In the present application, a pressure sensor is provided for receiving the reaction force of the welding target exerted on the pressure head, and the reaction force data is output to the electrical equipment for display and / or processing. In addition to the advantages of high integration and small space occupation, the integrated laser welding unit also has the function of real-time feedback of the clamping force of the pressure head, which can be used to adjust the welding operation conditions, thereby ensuring the reliability of the welding quality.

[0019] 2. In the present application, a pressure sensor is further provided to be connected to the pressure head structure through a spring member to ensure that the reaction force exerted on the pressure head can be evenly and linearly transmitted to the pressure sensor, so that the reaction force data output by the pressure sensor is more accurate.

[0020] 3. In the present application, an insulating connection is provided between the pressure head mounting plate and the pressure head to prevent the current generated by laser welding from being transmitted from the pressure head to other electronic components, thereby effectively avoiding the risk of short circuit, electric shock and potential damage to precision electronic equipment, and ensuring operational safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated into the specification and constitute a part of the specification, illustrate embodiments of the utility model and are used together with the description to explain the principles of the utility model. In these drawings, similar reference numerals are used to represent similar elements. The drawings described below are some embodiments of the utility model, rather than all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a structural schematic diagram of the pressure guide structure of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the pressure head structure of the utility model.

[0025] In the figure:

[0026] 1. Pressure head structure; 11. Pressure head; 12. Light hole; 13. First mounting plate; 14. Second mounting plate; 15. Insulating plate; 16. Insulating bushing; 17. Screw; 2. Driving structure; 3. Pressure guide structure; 31. Pressure sensor; 32. Pressure guide shaft; 33. Spring; 34. Spring top seat; 35. Limiting member; 4. Guide structure; 41. Slider; 42. Guide rail; 43. Guide rail mounting member; 51. Dust extraction pipe; 52. Air pipe joint; 6. First limiting member; 7. Second limiting member. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] The utility model provides an integrated laser welding unit, the specific structure of which is as follows:

[0029] like Figures 1 to 3As shown, the integrated laser welding unit includes a pressure head structure 1, a driving structure 2 for driving the pressure head structure 1 to move, and a pressure guide structure 3; the pressure head structure 1 includes a pressure head 11 for pressing the welding target material, and a light hole 12 for laser passing is provided in the middle of the pressure head 11; the driving structure 2 is preferably a slide cylinder driven by compressed air, and the slide cylinder is provided with a locked exhaust throttle valve for adjusting the cylinder extension and contraction speed; the pressure guide structure 3 includes a pressure sensor 31 connected to the pressure head structure 1, and the pressure sensor 31 is electrically connected to an electrical device for displaying and / or processing reaction force data, and its range is preferably 30kgf with wider compatibility. When in use, the slide cylinder drives the pressure head structure 1 to press down so that the pressure head 11 presses the welding target (not shown in the figure). When the pressure head 11 abuts against the welding target, the slide cylinder is still in operation, and the welding target begins to apply a reaction force to the pressure head 11. Since the pressure sensor 31 is connected to the pressure head structure 1, the pressure sensor 31 is subjected to the reaction force transmitted by the pressure head 11 at this time, and outputs the reaction force data to the electrical device. The electrical device can be a device that displays the reaction force data to monitor the pressing force of the pressure head 11 in real time, or it can be a device that can process the reaction force data. When the pressing force of the pressure head 11 exceeds the limit, the electrical device issues a shutdown command and alarms. Therefore, the integrated laser welding unit provided by the utility model not only has the advantages of high integration and small space occupation, but also has the function of real-time feedback of the pressing force of the pressure head 11, which can adjust the welding operation situation, thereby ensuring the reliability of the welding quality.

[0030] In order to ensure the smooth transmission of the reaction force, the pressure guide structure 3 also includes a spring member for transmitting the reaction force. The pressure sensor 31 is connected to the pressure head structure 1 through the spring member. The spring member can transmit the reaction force to the pressure sensor 31 evenly and linearly, thereby ensuring the accuracy of the reaction force data provided by the pressure sensor 31.

[0031] In some embodiments, the specific structure of the spring member is as follows: Figure 1 and Figure 2 As shown, the spring member includes a pressure guide shaft 32, a spring 33 sleeved on the outside of the pressure guide shaft 32, and a stopper 35 provided on the pressure guide shaft 32 for limiting the spring. One end of the spring 33 is connected to the pressure head structure 1, and the other end is connected to the stopper 35; the pressure sensor 31 is connected to the stopper 35. The spring 33 is preferably a rectangular spring. When the pressure head structure 1 is subjected to the reaction force of the welding target, the spring 33 is compressed and applies force to the stopper 35, so that the pressure sensor 31 is subjected to force and outputs the reaction force data.

[0032] As a further improvement of the above embodiment, the pressure guide shaft 32 passes through the pressure sensor 31, the stopper 35 and the spring 33 from top to bottom, and the center lines of the pressure sensor 31, the stopper 35 and the spring 33 are all on the same straight line with the center axis of the pressure guide shaft 32, thereby ensuring that the force directions of the above components are coaxial, making the reaction force data output by the pressure sensor 31 more reliable. In a specific embodiment, the pressure guide structure 3 also includes a fixed spring top seat 34, the end of the pressure guide shaft 32 is connected to the spring top seat 34, and the spring top seat 34 abuts against the pressure sensor 31, thereby limiting the pressure sensor 31.

[0033] The integrated laser welding unit also includes a guide structure 4 for guiding the movement of the pressure head structure 1, the guide structure 4 includes a guide rail mounting member 43 provided with a guide rail 42 and a slider 41 provided on the guide rail 42; the guide rail mounting member 43 is connected to the driving structure 2, and the slider 41 is connected to the pressure head structure 1, so that the pressure head structure 1 can move in a straight line along a predetermined path.

[0034] To limit the sliding of the slider 41 on the guide rail 42, as Figure 1 As shown, the guide rail mounting member 43 is provided with a first limiting member 6 for limiting the downward movement limit of the slider 41. In order to limit the upward movement of the slider 41, on this basis, considering that the integrated design should minimize the occupied space, the spring top seat 34 in the above embodiment is located above the slider 41 to form a second limiting member 7 for limiting the upward movement limit of the slider 41.

[0035] The pressure head structure 1 includes a pressure head mounting member, such as Figure 1 As shown, the pressure head mounting member includes a first mounting plate 13 and a second mounting plate 14 which are connected perpendicularly to each other; the first mounting plate 13 is connected to the driving structure 2, and the second mounting plate 14 is connected to the pressure head 11. This perpendicular mounting member design can establish a rectangular coordinate system in three-dimensional space, ensuring that the laser beam can accurately pass through the light hole 12 in the center of the pressure head 11 to reach the welding area, thereby ensuring the welding quality. When this embodiment is implemented in combination with the above-mentioned embodiment, the first mounting plate 13 is connected to the slider 41 to ensure that the pressure head 11 moves linearly along the guide direction of the guide rail 42.

[0036] like Figure 1 and Figure 3 As shown, the pressure head 11 and the second mounting plate 14 are connected by an insulating member, and the insulating member includes an insulating plate 15 clamped between the pressure head 11 and the second mounting plate 14. The existence of the insulating plate 15 can effectively prevent the current generated by laser welding from being transmitted from the pressure head 11 to other electronic components, avoid short circuits, electric shock risks and potential damage to precision electronic equipment, and ensure operational safety.

[0037] In order to ensure the installation stability and insulation performance of the pressure head 11 and the second mounting plate 14, as Figure 3 As shown, corresponding threaded holes are provided on the second mounting plate 14, the insulating plate 15 and the pressing head 11, and the second mounting plate 14, the insulating plate 15 and the pressing head 11 are connected by screws 17 which are sequentially passed through the threaded holes; the insulating member also includes an insulating bushing 16 arranged on the hole wall of the threaded hole, providing insulation protection for each connection point between the pressing head 11 and the second mounting plate 14.

[0038] Due to the slag splashing during welding, the integrated laser welding cell also includes a dust extraction structure, such as Figure 1 As shown, the dust extraction structure includes a dust extraction pipe 51 disposed above the welding surface of the pressure head 11. The dust extraction pipe 51 is preferably 15 to 17 mm higher than the welding surface of the pressure head 11, preferably 16.5 mm, to ensure the dust extraction effect. In addition, the dust extraction structure also includes two air pipe joints 52 disposed on both sides of the dust extraction pipe 51. Compared with a single air pipe joint 52, the design of multiple air pipe joints 52 can effectively prevent welding slag from blocking the hole and ensure sufficient shielding gas blowing.

[0039] The utility model also provides a laser welding device, including a mobile unit and the integrated laser welding unit as described above, wherein the integrated laser welding unit is connected to the mobile unit to achieve position movement. The mobile unit can be a fixed welding machine or a multi-axis robot. By changing the position of the integrated laser welding unit on the mobile unit, the target part of the welding connection can be changed, thereby achieving rapid changeover without disassembling parts.

[0040] The contents described above can be implemented individually or in combination in various ways, and these variations are all within the protection scope of the present utility model.

[0041] In the description of the invention, it should be noted that relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements.

[0042] In the description of the invention, it is also necessary to explain that the terms "center", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the invention. In the description of the invention, unless otherwise specified, "several" means two or more.

[0043] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementation methods, and the specific embodiments of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An integrated laser welding unit, comprising a pressure head structure (1) and a driving structure (2) for driving the pressure head structure (1) to move, wherein the pressure head structure (1) comprises a pressure head (11) for pressing a welding target material, and a light hole (12) for passing laser light is provided in the middle of the pressure head (11), characterized in that: The invention also comprises a pressure guide structure (3), wherein the pressure guide structure (3) comprises a pressure sensor (31) connected to the pressure head structure (1); when the driving structure (2) drives the pressure head (11) to abut against the welding target material, the welding target material applies a reaction force to the pressure head (11), so that the pressure sensor (31) is subjected to force and outputs reaction force data; the pressure sensor (31) is electrically connected to an electrical device for displaying and / or processing the reaction force data.

2. The integrated laser welding unit according to claim 1, characterized in that: The pressure guide structure (3) further comprises a spring member for transmitting the reaction force, and the pressure sensor (31) is connected to the pressure head structure (1) via the spring member.

3. The integrated laser welding unit according to claim 2, characterized in that: The spring component comprises a pressure guide shaft (32), a spring (33) sleeved on the outside of the pressure guide shaft (32), and a limiting component (35) provided on the pressure guide shaft (32) and used to limit the spring (33); one end of the spring (33) is connected to the pressure head structure (1) and the other end is connected to the limiting component (35); the pressure sensor (31) is connected to the limiting component (35).

4. The integrated laser welding unit according to claim 1, characterized in that: It also includes a guide structure (4) for guiding the movement of the pressure head structure (1), the guide structure (4) including a guide rail mounting member (43) provided with a guide rail (42) and a slider (41) provided on the guide rail (42); the guide rail mounting member (43) is connected to the driving structure (2), and the slider (41) is connected to the pressure head structure (1).

5. The integrated laser welding unit according to claim 4, characterized in that: The guide rail mounting member (43) is provided with a limiting member for limiting the movement limit of the sliding block (41).

6. The integrated laser welding unit according to claim 1, characterized in that: The pressure head structure (1) comprises a pressure head mounting component, wherein the pressure head mounting component comprises a first mounting plate (13) and a second mounting plate (14) which are vertically connected to each other; the first mounting plate (13) is connected to the driving structure (2), and the second mounting plate (14) is connected to the pressure head (11).

7. The integrated laser welding unit according to claim 6, characterized in that: The pressure head (11) and the second mounting plate (14) are connected via an insulating member, and the insulating member comprises an insulating plate (15) sandwiched between the pressure head (11) and the second mounting plate (14).

8. The integrated laser welding unit according to claim 7, characterized in that: The second mounting plate (14), the insulating plate (15) and the pressing head (11) are all provided with corresponding threaded holes, and the second mounting plate (14), the insulating plate (15) and the pressing head (11) are connected by screws (17) which are sequentially inserted through the threaded holes; the insulating member also includes an insulating bushing (16) provided on the hole wall of the threaded hole.

9. The integrated laser welding unit according to claim 1, characterized in that: It also comprises a dust extraction structure, which comprises a dust extraction pipe (51) arranged above the welding surface of the pressure head (11).

10. A laser welding device, comprising a moving unit, characterized in that: It also includes an integrated laser welding unit as described in any one of claims 1 to 9, wherein the integrated laser welding unit is connected to the moving unit to achieve position movement.

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