Flying welding device for bidirectional tracking and positioning of power battery

Abstract

The utility model discloses a flying welding device for two-way tracking and positioning of a power battery, which belongs to the field of laser welding equipment and comprises a welding component and a positioning component, positioning cameras are respectively arranged on two sides of a numerical control unit of the welding component, so that the welding component can accurately position the power battery when moving back and forth along the connecting line direction of the two positioning cameras. And the positioning cameras can be used for positioning the welding position of the welding assembly in real time, so that the welding assembly can perform the alignment welding process of the workpiece to be welded in the back-and-forth process. The flying welding device for bidirectional tracking and positioning of the power battery is compact in structure, convenient to use and capable of effectively avoiding or shortening the operation time increased due to positioning return, improving the welding efficiency and the production efficiency of the power battery and reducing the production and application cost of the power battery, and has good practical value.

Description

Technical Field

[0001] The utility model belongs to the field of laser welding equipment, and in particular relates to a flying welding device for bidirectional tracking and positioning of a power battery. Background Art

[0002] Power batteries are widely used in new energy vehicles, mobile devices and other fields due to their advantages such as light weight and long life, and play an increasingly important role in life and production. In the development of power batteries, power battery welding technology is one of the core technologies required in the production process of power batteries and has received widespread attention.

[0003] At present, most power battery welding devices often only involve one-way welding, and are limited to the method of positioning first and then welding. Although this welding method can meet the needs of actual processing to a certain extent, it also has problems such as accuracy deviation of data transmission of the positioning device and low welding quality of the welding device. Moreover, for the method of positioning first and then welding in the related technology, it is usually necessary to first measure the positioning information of the power battery on the device of the positioning station, then set the robot motion trajectory, and finally return to weld. The whole process needs to go through multiple motion control and state adjustment processes, which greatly affects the welding efficiency and increases the welding cost to a certain extent, resulting in an increase in the manufacturing and application costs of power batteries. Utility Model Content

[0004] In response to one or more of the above-mentioned defects or improvement needs of the prior art, the utility model provides a flying welding device for bidirectional tracking and positioning of power batteries, which can effectively meet the welding needs of power batteries while improving the efficiency and accuracy of the welding process and reducing the production and application costs of power batteries.

[0005] To achieve the above-mentioned purpose, the utility model provides a flying welding device for bidirectional tracking and positioning of power batteries, comprising a fixing assembly for fixing a workpiece to be welded and a welding assembly arranged above the fixing assembly; a positioning assembly is also arranged on the welding assembly;

[0006] The welding assembly includes a numerical control unit connected to the displacement mechanism and a field lens arranged below the numerical control unit. A laser output head for connecting to a laser is arranged on one side of the numerical control unit corresponding to the field lens, so that the laser emitted by the laser can be guided to the field lens via the laser output head and then output; accordingly, the welding assembly also includes a focusing module for laser focusing;

[0007] The positioning assembly includes a first positioning camera and a second positioning camera connected on both sides of the numerical control unit. The two positioning cameras are coaxially arranged with the numerical control unit and are used to locate the welding position of the welding assembly when the numerical control unit reciprocates along the direction of the line connecting the two positioning cameras.

[0008] As a further improvement of the present invention, the fixing assembly includes a stage and a holding unit arranged corresponding to the stage, and the workpiece to be welded can be fixed on the stage by the holding unit.

[0009] As a further improvement of the present utility model, the holding unit includes a cover plate arranged above the stage;

[0010] At least one row of copper nozzles with hollowed-out middle parts are provided on the bottom surface of the cover plate, which can be used to simultaneously press and hold at least one row of workpieces to be welded on the stage; and through holes are coaxially opened on the cover plate corresponding to each of the copper nozzles, so that the laser from the welding assembly can complete the processing of the corresponding workpiece on the stage after passing through the coaxially aligned through holes and copper nozzles.

[0011] As a further improvement of the utility model, multiple rows of hollow copper nozzles are arranged in an array on the bottom surface of the cover plate, which are used to press and fix multiple rows of workpieces to be welded placed in an array on the stage; accordingly, through holes are opened in an array on the cover plate.

[0012] As a further improvement of the utility model, the arrangement direction of each row of copper nozzles is parallel to the connection direction of the two positioning cameras.

[0013] As a further improvement of the present invention, the distances between the two positioning cameras and the center of the field lens are equal.

[0014] As a further improvement of the utility model, the center distance between two adjacent copper nozzles in the same row is equal to the distance from the center of the field lens to any positioning camera.

[0015] As a further improvement of the present invention, the two positioning cameras are respectively 3D line laser cameras.

[0016] As a further improvement of the present invention, the welding assembly further comprises an indicating unit arranged on the numerical control unit, which is used for lighting the welding position of the welding assembly and indicating the focal position.

[0017] As a further improvement of the utility model, the welding assembly further includes an air blowing mechanism;

[0018] The air blowing mechanism is connected to the lower part of one side of the numerical control unit through a bracket, and its air blowing range covers the working range of the field mirror, and is used for blowing and cleaning the welding position.

[0019] The above-mentioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0020] In general, compared with the prior art, the above technical solutions conceived by the utility model have the following beneficial effects:

[0021] (1) The utility model discloses a flying welding device for bidirectional tracking and positioning of power batteries, which comprises a welding assembly and a positioning assembly. Positioning cameras are respectively arranged on both sides of the numerical control unit of the welding assembly, so that when the welding assembly moves back and forth along the direction of the line connecting the two positioning cameras, the positioning cameras can locate the welding position of the welding assembly in real time, so that the welding assembly can perform the alignment welding process of the workpiece to be welded during the round trip process, thereby effectively improving the welding efficiency of the welding device; moreover, since the positioning camera and the welding assembly are fixedly arranged, the mobile positioning process can be carried out synchronously with the movement process of the welding assembly, thereby effectively avoiding the large amount of time consumed by the traditional mode in which the welding assembly moves only after the positioning assembly is positioned and returned, thereby further improving the welding efficiency of the welding device.

[0022] (2) The utility model of the flying welding device for bidirectional tracking and positioning of power batteries can realize bidirectional tracking and positioning of the workpieces to be welded by setting the specific form of the fixing component, utilizing the combination of the cover plate and the copper nozzle, and coordinating the corresponding settings of the welding component and the positioning component, so that the flying welding device can accurately complete the welding of one or more rows of workpieces, thereby effectively avoiding the empty return of the welding component and improving the efficiency of power battery welding.

[0023] (3) The flying welding device for bidirectional tracking and positioning of power batteries of the utility model utilizes the corresponding settings of the focusing module, the indicating unit and the blowing mechanism in the welding assembly to further ensure the accuracy of the welding process, improve the welding quality of the power battery and reduce the scrap rate of the product.

[0024] (4) The flying welding device for bidirectional tracking and positioning of power batteries of the utility model has a compact structure and is easy to use. It can effectively avoid or shorten the operation time increased by the positioning return trip, improve the welding efficiency and production efficiency of power batteries, and reduce the production and application costs of power batteries. It has good practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1It is a structural schematic diagram of a flying welding device in an embodiment of the utility model;

[0027] Figure 2 This is a schematic diagram of the working state of the flying welding device in the embodiment of the utility model;

[0028] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0029] 1. Welding assembly; 2. Positioning assembly; 3. Fixing assembly; 4. Workpiece;

[0030] 101. CNC unit; 102. Field lens; 103. Focusing module; 104. Laser output head; 105. Indicator unit; 106. Air blowing mechanism;

[0031] 201, a first positioning camera; 202, a second positioning camera;

[0032] 301. Cover plate; 302. Copper nozzle; 303. Loading table. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model. In addition, the technical features involved in each embodiment of the utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] In the description of the present invention, it should be understood that, unless otherwise expressly specified and limited, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] Example:

[0039] The flying welding device for bidirectional tracking and positioning of a power battery in the preferred embodiment of the utility model can be used for welding operations of a workpiece 4 to be welded, and is particularly suitable for the positioning welding process of a power battery.

[0040] In a preferred embodiment, a flying welding device for bidirectional tracking and positioning of power batteries includes a fixing component 3 for fixing a workpiece 4 to be welded (such as a power battery module) and a welding component 1 arranged above the fixing component 3. More importantly, a positioning component 2 is also arranged on the welding component 1.

[0041] like Figure 1 As shown in the figure, the welding assembly 1 in the preferred embodiment includes a numerical control unit 101 connected to a displacement mechanism (not shown in the figure) and a field lens 102 arranged below the numerical control unit 101. At the same time, a laser output head 104 for connecting to a laser (not shown in the figure) is arranged on one side of the numerical control unit 101 corresponding to the field lens 102, so that the laser emitted by the laser can be guided to the field lens 102 via the laser output head 104 and then output, and finally the welding process of the workpiece 4 to be welded on the fixed assembly 3 is completed.

[0042] In actual configuration, the displacement mechanism is disposed on one side or above the fixed component 3, and is used to drive the welding component 1 to perform reciprocating motion relative to the fixed component 3. In a specific preferred embodiment, the displacement mechanism can be a multi-axis robot arm, or a displacement mechanism disposed on a support mechanism and capable of performing planar orthogonal displacement control, such as a slider-rail assembly.

[0043] Of course, the configuration of the displacement mechanism is not limited to the above examples. As long as it can drive the welding assembly 1 to complete plane displacement or three-dimensional space displacement, there are many mature technical solutions available in the relevant technology, which will not be elaborated here.

[0044] Furthermore, the welding component 1 also includes a focusing module 103 for laser focusing, which is arranged on one side of the numerical control unit 101, and preferably includes a collimator mirror arranged on the laser light path. By adjusting the (vertical) position of the collimator mirror, the focal position of the laser on the fixed component 3 is adjusted to complete the focusing process of the welding component 1.

[0045] In more detail, the positioning assembly 2 in the preferred embodiment includes a first positioning camera 201 and a second positioning camera 202 connected on both sides of the numerical control unit 101. The two positioning cameras are coaxially arranged with the numerical control unit 101 and are used to locate the welding position of the welding assembly 1 when the numerical control unit 101 reciprocates along the direction of the line connecting the two positioning cameras.

[0046] During actual setting, the two positioning cameras of the positioning component 2 are electrically connected to the CNC unit 101 respectively. The positioning of the welding position of the welding component 1 is completed through the shooting of the two positioning cameras, and the welding trajectory of the welding component 1 is finally determined, guiding the welding component 1 to complete the welding process of the corresponding workpiece 4.

[0047] By coaxially setting two positioning cameras on both sides of the numerical control unit 101, the positioning component 2 and the welding component 1 are integrated together, effectively avoiding the problem of long travel time in the traditional mode of first controlling the positioning mechanism to complete positioning and then return, and finally controlling the welding mechanism to move, thereby realizing synchronous motion control of the welding component 1 and the positioning component 2. In addition, the two positioning cameras are respectively set on both sides of the numerical control unit 101, so that when the welding component 1 moves back and forth along the direction of the connection line of the two positioning cameras, there is always a positioning camera in front of it to locate the welding point for it, thereby effectively avoiding the return of the welding component 1. Without significantly adjusting the position of the welding component 1, the welding operation of the "U-shaped" trajectory or the "S-shaped" trajectory is realized, which greatly improves the welding efficiency of the workpiece.

[0048] Further preferably, the fixing assembly 3 in the preferred embodiment includes a stage 303 and a holding unit provided corresponding to the stage 303 , and the workpiece 4 to be welded can be fixed on the stage 303 by the holding unit.

[0049] It can be understood that after the workpiece 4 is pressed and fixed, a path for laser beam transmission is formed between the workpiece 4 and the field lens 102, that is, the pressing unit will not block the welding position of the workpiece 4 on the laser transmission path.

[0050] In a specific preferred embodiment, the pressing unit includes a cover plate 301 disposed above the stage 303, such as Figure 2 At the same time, at least one row of hollow copper nozzles 302 are arranged on the bottom surface of the cover plate 301, and the copper nozzles 302 are arranged at intervals from each other, and can be used to simultaneously press and hold at least one row of workpieces 4 to be welded on the stage 303.

[0051] Correspondingly, through holes are coaxially opened on the cover plate 301 corresponding to each copper nozzle 302, so that the laser from the welding component 1 can complete the processing of the corresponding workpiece 4 on the stage 303 after passing through the coaxially aligned through holes and copper nozzles 302.

[0052] More preferably, multiple rows of hollow copper nozzles 302 are arranged in an array on the bottom surface of the cover plate 301, which are used to hold and fix multiple rows of workpieces 4 to be welded placed in an array on the stage 303; accordingly, through holes are opened in an array on the cover plate 301. In actual arrangement, the arrangement direction of the multiple rows of copper nozzles 302 is preferably parallel.

[0053] By setting up multiple rows of copper nozzles 302, multiple rows of workpieces 4 can be fixed on the stage 303 at the same time. In a preferred embodiment, corresponding to the positioning and placement of multiple rows of workpieces 4, grooves are preferably arranged in an array on the top surface of the stage 303 to facilitate the orderly placement of multiple workpieces 4. Accordingly, the cover plate 301 can hold each workpiece 4 in each groove when cooperating with the stage 303.

[0054] In order to simplify the adjustment and control process of the welding assembly 1, the arrangement direction of each row of copper nozzles 302 in the preferred embodiment is preferably parallel to the direction of the connection line of the two positioning cameras. In this way, after completing the positioning and pressing of the workpiece 4, it is only necessary to control the welding assembly 1 to perform a plane displacement (no need to rotate for angle adjustment) to adjust the field lens 102 to be directly above a row of workpieces 4 to be welded, and the connection line between the field lens 102 and the positioning camera is parallel to the arrangement direction of the row of workpieces 4.

[0055] Exemplarily, in a specific preferred embodiment, the two positioning cameras are 3D line laser cameras respectively.

[0056] More specifically, for the welding device in the preferred embodiment, the welding assembly 1 further includes an indication unit 105 disposed on the numerical control unit 101, which is used to illuminate the welding position of the welding assembly 1 and indicate the focus position. The indication unit 105 in the preferred embodiment is disposed on one side of the bottom of the numerical control unit 101, for example Figure 2 shown on the right.

[0057] In addition, the welding assembly 1 in the preferred embodiment further includes a blowing mechanism 106, which is connected to the lower side of the numerical control unit 101 through a bracket, for example Figure 2 The air blowing range of the air blowing mechanism 106 covers the working range of the field lens 102 and is used for blowing and cleaning the welding position.

[0058] Further preferably, the distances between the two positioning cameras and the center of the field lens 102 are equal. With such an arrangement, when the welding assembly 1 moves back and forth, the travel distance of the field lens 102 after the positioning camera completes positioning is equal during its "forward" and "backward" processes, thereby further simplifying the welding process of the workpiece 4.

[0059] In addition, corresponding to the above-mentioned setting of the positioning camera and the welding assembly 1, in the preferred embodiment, the center distance between two adjacent copper nozzles 302 in the same row is further preferably set to be equal to the distance from the center of the field lens 102 to any positioning camera, so as to further simplify the distance control process during the operation of the device.

[0060] The utility model is a flying welding device for bidirectional tracking and positioning of power batteries, which has a compact structure and is easy to use. It can effectively avoid or shorten the operation time increased by positioning return, improve the welding efficiency and production efficiency of power batteries, reduce the production and application costs of power batteries, and has good practical value.

[0061] It is easy for those skilled in the art to understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flying welding device for bidirectional tracking and positioning of power batteries, comprising a fixing assembly for fixing a workpiece to be welded and a welding assembly arranged above the fixing assembly; characterized in that: A positioning assembly is also provided on the welding assembly; The welding assembly includes a numerical control unit connected to the displacement mechanism and a field lens arranged below the numerical control unit. A laser output head for connecting to a laser is arranged on one side of the numerical control unit corresponding to the field lens, so that the laser emitted by the laser can be guided to the field lens via the laser output head and then output; accordingly, the welding assembly also includes a focusing module for laser focusing; The positioning assembly includes a first positioning camera and a second positioning camera connected on both sides of the numerical control unit. The two positioning cameras are coaxially arranged with the numerical control unit and are used to locate the welding position of the welding assembly when the numerical control unit reciprocates along the direction of the line connecting the two positioning cameras.

2. The flying welding device for bidirectional tracking and positioning of power batteries according to claim 1 is characterized in that: The fixing assembly includes a stage and a pressing unit arranged corresponding to the stage, and the workpiece to be welded can be fixed on the stage by the pressing unit.

3. The flying welding device for bidirectional tracking and positioning of power batteries according to claim 2 is characterized in that: The pressing unit includes a cover plate arranged above the stage; At least one row of copper nozzles with hollowed-out middle parts are provided on the bottom surface of the cover plate, which can be used to simultaneously press and hold at least one row of workpieces to be welded on the stage; and through holes are coaxially opened on the cover plate corresponding to each of the copper nozzles, so that the laser from the welding assembly can complete the processing of the corresponding workpiece on the stage after passing through the coaxially aligned through holes and copper nozzles.

4. The flying welding device for bidirectional tracking and positioning of power batteries according to claim 3 is characterized in that: The bottom surface of the cover plate is provided with multiple rows of hollow copper nozzles in an array, which are used to press and fix multiple rows of workpieces to be welded placed in an array on the stage; correspondingly, through holes are opened in an array on the cover plate.

5. The flying welding device for bidirectional tracking and positioning of power batteries according to claim 4 is characterized in that: The arrangement direction of each row of copper nozzles is parallel to the connection direction of the two positioning cameras.

6. The flying welding device for bidirectional tracking and positioning of power batteries according to any one of claims 3 to 5, characterized in that: The distances between the two positioning cameras and the center of the field lens are equal.

7. The flying welding device for bidirectional tracking and positioning of power batteries according to claim 6 is characterized in that: The center distance between two adjacent copper nozzles in the same row is equal to the distance from the center of the field lens to any positioning camera.

8. The flying welding device for bidirectional tracking and positioning of power batteries according to any one of claims 1 to 5 and 7, characterized in that: The two positioning cameras are respectively 3D line laser cameras.

9. The flying welding device for bidirectional tracking and positioning of power batteries according to any one of claims 1 to 5 and 7, characterized in that: The welding assembly further comprises an indicating unit arranged on the numerical control unit, which is used for lighting the welding position of the welding assembly and indicating the focal position.

10. The flying welding device for bidirectional tracking and positioning of power batteries according to any one of claims 1 to 5 and 7, characterized in that: The welding assembly also includes a blowing mechanism; The air blowing mechanism is connected to the lower part of one side of the numerical control unit through a bracket, and its air blowing range covers the working range of the field mirror, and is used for blowing and cleaning the welding position.

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