Welding system

Abstract

The embodiment of the utility model discloses a welding system which is characterized in that a welding rotating platform comprises a plurality of stations, each station is correspondingly provided with a clamp assembly, the clamp assemblies are used for clamping a to-be-welded workpiece, the surfaces of the clamp assemblies are provided with calibration patterns, and the calibration patterns are used for positioning the to-be-welded workpiece; the visual positioning system is used for carrying out image acquisition on the target station rotating to the visual detection area to obtain a target image containing a calibration pattern and a to-be-welded workpiece, and positioning the to-be-welded workpiece according to the target image; the laser welding system comprises a laser welding device, and the laser welding system is used for controlling the laser welding device to weld the positioned to-be-welded workpiece rotating to the laser welding area. By implementing the embodiment of the invention, the welding accuracy of laser welding can be improved, and the quality of produced workpieces is ensured.

Description

Technical Field

[0001] The present application relates to the field of welding technology, and in particular to a welding system. Background Art

[0002] During the battery production process, the battery needs to be welded, such as welding the battery sealing nails, welding the battery top cover seal, etc. In order to improve the production efficiency of the battery, the laser flying welding method is generally used. Multiple fixture assemblies on the welding platform can clamp the battery. When welding multiple batteries, the multiple fixture assemblies on the welding platform can keep moving, which reduces the waiting time during the welding process and improves the production efficiency of the battery. However, since the battery is always in a moving state, once the fixture assembly is not clamped accurately enough, the actual welding trajectory of the laser will be wrong, affecting the welding accuracy. Utility Model Content

[0003] The embodiment of the present application discloses a welding system, which can improve the welding accuracy of laser welding and ensure the quality of produced workpieces.

[0004] The present application embodiment discloses a welding system, the welding system comprising:

[0005] A welding rotating platform, the welding rotating platform comprises a plurality of workstations, each of the plurality of workstations is provided with a fixture assembly corresponding thereto, the fixture assembly is used to clamp a workpiece to be welded, a calibration pattern is provided on the surface of the fixture assembly, and the calibration pattern is used to position the workpiece to be welded;

[0006] A visual positioning system, the visual positioning system is set corresponding to the visual detection area, the visual positioning system is used to collect images of the target station rotated to the visual detection area, obtain a target image including the calibration pattern and the workpiece to be welded, and locate the workpiece to be welded according to the target image;

[0007] A laser welding system, the laser welding system includes the laser welder, the laser welder is set corresponding to the laser welding area, the laser welding area is different from the visual inspection area, and the laser welding system is used to control the laser welder to weld the workpiece to be welded after it is rotated to the laser welding area and positioned.

[0008] In one embodiment, the welding rotating platform is also used to rotate and drive the target workstation to first rotate to the visual inspection area and then rotate to the laser welding area.

[0009] In one embodiment, the fixture assembly includes a positioning plate and a lifting member, the workpiece to be welded is clamped between the lifting member and the positioning plate, the positioning plate includes a first surface facing the visual positioning system, a hollow area located in the center of the first surface is provided on the first surface, and the calibration pattern is provided on the first surface and in a non-hollow area located on the periphery of the hollow area.

[0010] In one embodiment, the hollow area is a circular hollow area.

[0011] In one embodiment, the calibration pattern includes at least two auxiliary positioning lines, and the intersection position of the extension lines of the at least two auxiliary positioning lines is the center position corresponding to the hollow area.

[0012] In one embodiment, the calibration pattern includes 2M auxiliary positioning lines, where M is an integer greater than 1, and the 2M auxiliary positioning lines are divided into M groups. The two auxiliary positioning lines contained in each group are located on the same straight line, and the intersection position of the M straight lines corresponding to the M groups is the center position corresponding to the hollow area.

[0013] In one embodiment, the positioning plate further includes a second surface opposite to the first surface, the second surface is set at a target welding height, and the lifting member is used to lift the workpiece to be welded until it abuts against the second surface.

[0014] In one embodiment, a support member is respectively provided corresponding to the plurality of workstations, the support member is used to support the fixture assembly, and the support member is provided with a void area corresponding to the hollow area.

[0015] In one embodiment, the visual inspection area and the laser welding area are separated by N stations, where N is a positive integer.

[0016] In one embodiment, the welding system further comprises a driving device, wherein the driving device is connected to the welding rotating platform, and the driving device is used to drive the welding rotating platform to keep rotating.

[0017] The welding system disclosed in the embodiment of the present application includes a welding rotating platform, a visual positioning system and a laser welding system. The welding rotating platform includes a plurality of workstations, each of which corresponds to a fixture assembly, and the fixture assembly is used to clamp the workpiece to be welded; the visual positioning system is set corresponding to the visual detection area, and the visual positioning system is used to collect images of the target workstation rotated to the visual detection area, obtain a target image containing a calibration pattern and the workpiece to be welded, and locate the workpiece to be welded according to the target image; the laser welding system includes a laser welder, and the laser welder is set corresponding to the laser welding area, and the laser welding area is different from the visual detection area. The laser welding system is used to control the laser welder to weld the workpiece to be welded after being rotated to the laser welding area. Through the mutual cooperation between the welding rotating platform, the visual positioning system and the laser welding system, the workpiece to be welded on the target workstation can be accurately positioned, and there is no need to fine-tune the fixture assembly, thereby avoiding the influence of the installation error or clamping error of the fixture assembly on welding, improving the welding accuracy of laser welding, and ensuring the quality of the workpiece produced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, 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 application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a welding system disclosed in an embodiment of the present application;

[0020] Figure 2-A It is a top view schematic diagram of a welding rotating platform disclosed in an embodiment of the present application;

[0021] Figure 2-B It is a top view schematic diagram of another welding rotating platform disclosed in an embodiment of the present application;

[0022] Figure 3 is a schematic diagram of a location detection scenario disclosed in an embodiment of the present application;

[0023] Figure 4-A is a schematic diagram of a visual positioning system collecting a target image disclosed in an embodiment of the present application;

[0024] Figure 4-B is a schematic diagram of a target image disclosed in an embodiment of the present application;

[0025] Figure 5 It is a schematic diagram of lifting a workpiece to be welded disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] It should be noted that the terms "including" and "having" in the embodiments of the present application and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first image position may be referred to as a second image position, and similarly, a second image position may be referred to as a first image position without departing from the scope of this application. Both the first image position and the second image position are image positions, but they are not the same image position.

[0029] The embodiment of the present application discloses a welding system, which can improve the welding accuracy of laser welding.

[0030] The following is a detailed description with reference to the accompanying drawings.

[0031] like Figure 1 As shown, Figure 1 1 is a schematic diagram of the structure of a welding system disclosed in an embodiment of the present application, and the welding system may include a welding rotating platform 110, a visual positioning system 120, and a laser welding system 130. Optionally, the welding rotating platform 110, the visual positioning system 120, and the laser welding system 130 may correspond to multiple system controllers, namely, a system controller of the welding rotating platform 110, a system controller of the visual positioning system 120, and a system controller of the laser welding system, and each system controller may be communicatively connected. Optionally, the welding rotating platform 110, the visual positioning system 120, and the laser welding system 130 may also correspond to a master controller, which may simultaneously control the welding rotating platform 110, the visual positioning system 120, and the laser welding system 130 to achieve the coordination of the welding rotating platform 110, the visual positioning system 120, and the laser welding system 130. The embodiment of the present application is not limited to this.

[0032] The welding rotating platform 110 may include a plurality of workstations, each of which is provided with a fixture assembly corresponding to the plurality of workstations, that is, the plurality of fixture assemblies and the plurality of workstations may be provided in a one-to-one correspondence, wherein: Figure 1 The plurality of workstations and the plurality of fixture assemblies are not shown in the figure. The fixture assembly is used to clamp the workpiece 140 to be welded. The plurality of fixture assemblies respectively arranged at the plurality of workstations can be respectively used to clamp the workpiece 140 to be welded at the plurality of workstations. The workpiece 140 to be welded can be a battery to be welded. Figure 1 For example, Figure 1 If there are four workpieces 140 to be welded, it means that the welding rotating platform 110 can include four workstations, each of which is provided with a fixture assembly, and the fixture assembly corresponding to each workstation can be used to clamp the workpiece to be welded on each workstation. Among them, the surface of the fixture assembly can also be provided with a calibration pattern, and the calibration image is used to locate the workpiece 140 to be welded.

[0033] The welding system may also include a driving device, and the welding rotating platform 110 may also be connected to the driving device, which may drive the welding rotating platform 110 to rotate. Optionally, the driving device may drive the welding rotating platform 110 to rotate around the rotation axis. The position of the rotation axis may be determined according to the center position of the welding rotating platform 110, and may be perpendicular to the platform body of the welding rotating platform. The rotation speed of the welding rotating platform is usually fixed, but it may also be set according to actual conditions, such as variable speed operation. However, it should be understood that during the laser flight welding process, the rotation of the welding rotating platform 110 will not stop, that is, the image acquisition and laser welding in the embodiment of the present application are also performed during the rotation of the welding rotating platform. The welding rotating platform 110 may be used to rotate to drive multiple stations to rotate, so that multiple fixture assemblies and the workpieces to be welded 140 clamped by each fixture assembly rotate, that is, each workpiece to be welded 140 may also rotate following the rotation of the welding rotating platform 110. Optionally, the distance between each station and the rotation axis may be the same, that is, each station is located on the same rotation circle. Specifically, the driving device and the welding rotating platform 110 may correspond to a platform control system, and the platform control system may be used to control the driving device and the welding rotating platform 110 .

[0034] The visual positioning system 120 may include an image acquisition device, such as a camera, an infrared camera, etc. The visual positioning system 120 may be set corresponding to the visual inspection area, and the position of the visual positioning system 120 does not change with the rotation of the welding rotating platform 110. Among them, the visual inspection area may be a preset spatial area, and the visual positioning system 120 may acquire a target image corresponding to the visual inspection area. In the case where the visual inspection area includes a part of the welding rotating platform 110, the target image acquired by the visual positioning system 120 also includes a part of the welding rotating platform 110. However, during the rotation of the welding rotating platform 110, the part of the welding rotating platform 110 included in the visual inspection area may change. Therefore, the welding rotating platform 110 can drive each workstation to enter the visual inspection area respectively by rotating, and the visual positioning system 120 can thereby acquire an image of the target workstation rotated to the visual inspection area, obtain a target image including a calibration pattern and the workpiece 140 to be welded, and locate the workpiece 140 to be welded according to the target image.

[0035] Specifically, during the rotation of the welding rotating platform 110, each workstation can first rotate to the visual inspection area, and then rotate to the laser welding area. The laser welder is set corresponding to the laser welding area, that is, the laser welder is aimed at the laser welding area. The laser welding area refers to the area where the laser welder performs laser welding on the workpiece to be welded. Here, the visual inspection area is mainly used for description. The laser welding area can refer to the description of the visual inspection area. Figure 2-A As shown, Figure 2-A 1 is a top view schematic diagram of a welding rotating platform disclosed in an embodiment of the present application. Since the rotation of the welding rotating platform 110 drives multiple stations to rotate, a target station can be rotated into the visual inspection area 200, that is, Figure 2-A The workpiece 140 to be welded held by the fixture assembly corresponding to the target station is located in the visual inspection area 200. As the welding rotating platform 110 rotates, other workpieces 140 to be welded can also be rotated into the visual inspection area 200. For example, the welding rotating platform 110 can rotate in the clockwise direction. Figure 2-A The workpiece 140 to be welded at the lower left of the middle visual inspection area 200 can be rotated to the visual inspection area 200 as the welding rotating platform 110 rotates.

[0036] Optionally, the welding system may further include a position detection device, which may be used to detect the position of each workstation to determine whether each workstation has reached the visual detection area and / or the laser welding area. It should be understood that although the visual detection area includes a larger range, the visual positioning system 120 does not perform image acquisition when the target workstation is at any position in the visual detection area. Instead, when the target workstation is at the visual detection position in the visual detection area, the visual positioning system 120 performs image acquisition on the target workstation rotated to the visual detection area to obtain a target image, thereby facilitating the positioning of the workpiece 140 to be welded in the target image. Optionally, the position detection device may also be used to detect the position of each workstation to determine whether each workstation has reached the visual detection position in the visual detection area and / or the laser welding position in the laser welding area, that is, it may be detected whether the target workstation has reached the visual detection area and / or the laser welding area.

[0037] Optionally, the position detection device may include an encoder of the welding rotating platform 110. The platform control system may determine the target rotation angle required for each workstation to rotate to the visual detection position through the encoder of the welding rotating platform 110, thereby determining that each workstation has rotated to the visual detection position when the welding rotating platform 110 reaches the target rotation angle. The platform control system may obtain the pulse signal of the driving device collected by the encoder, and determine the rotation angle of each workstation based on the pulse signal, thereby determining whether each workstation has rotated to the visual detection position. Specifically, Figure 2-B As shown, Figure 2-B It is a top view schematic diagram of another welding rotating platform disclosed in an embodiment of the present application. The welding rotating platform 110 can rotate in a clockwise direction with the rotation axis corresponding to the center of the platform. The target rotation angle required for the station 310 to rotate to the visual inspection position 320 is 90 degrees. Therefore, after the welding rotating platform rotates 90 degrees clockwise, the platform control system determines that the station 310 rotates to the visual inspection position. Optionally, the welding rotating platform can also rotate in a counterclockwise direction with the rotation axis corresponding to the center of the platform. The target rotation angle required for the station 310 to rotate to the visual inspection position 320 is 270 degrees. Therefore, after the welding rotating platform rotates 270 degrees counterclockwise, it is determined that the station 310 rotates to the visual inspection position.

[0038] Optionally, the position detection device may include a photoelectric sensor and a sensor sheet of the welding rotating platform 110. The platform control system may also be connected to the photoelectric sensor in communication. The photoelectric sensor includes a transmitter and a receiver. The transmitter is used to transmit a light beam to the receiver. Each station of the welding rotating platform 110 is provided with a sensor sheet corresponding to the transmitter. The sensor sheet is used to block the propagation of the light beam between the transmitter and the receiver when the target station rotates to the visual detection position. If the platform control system receives an arrival signal sent by the photoelectric sensor, it can be determined that the target station has rotated to the visual detection position. The arrival signal is a signal sent by the photoelectric sensor when the receiver cannot receive the light beam emitted by the transmitter. Optionally, the transmitting end can continuously send a light beam to the receiving end during the welding process, and the sensor plate can rotate with the rotation of the welding rotating platform. The positions of the sensor plate and the photoelectric sensor can be pre-set. When the welding rotating platform drives the target workstation to rotate to the visual detection position, the sensor plate also rotates between the transmitting end and the receiving end of the photoelectric sensor to block the propagation of the light beam between the transmitting end and the receiving end, so that the receiving end cannot receive the light beam emitted by the transmitting end. That is, the failure of the receiving end to receive the light beam indicates that the target workstation has reached the visual detection position, and the photoelectric sensor can send an arrival signal to the control device.

[0039] Optionally, the method of determining that the target station has reached the visual detection position by using a photoelectric sensor can be used together with the method of determining that the target station has reached the visual detection position by using a pulse signal obtained by an encoder in the above embodiment to enhance accuracy. Figure 3 As shown, Figure 3 It is a schematic diagram of a position detection scenario disclosed in an embodiment of the present application. The encoder 111 can collect the pulse signal of the driving device. The sensor sheet 112 is arranged below the target station. When the target station rotates to the visual detection position, the sensor sheet 112 can block the light beam emitted from the transmitting end of the photoelectric sensor 150 to the receiving end.

[0040] In order to more clearly illustrate the process of acquiring the target image, Figure 4-A As shown, Figure 4-A is a schematic diagram of a target image acquisition system disclosed in an embodiment of the present application. The visual positioning system 120 can acquire an image of a target station rotated to the visual detection area to obtain a target image including a calibration pattern and a workpiece to be welded. The target image can be as follows Figure 4-B As shown, Figure 4-B It is a schematic diagram of a target image disclosed in an embodiment of the present application.

[0041] The visual positioning system 120 can determine the position deviation of the workpiece to be welded on the target station according to the target image, and send the position deviation corresponding to the target station and the corresponding station identification to the platform control system for storage. The position deviation can be used to characterize the position deviation of the workpiece to be welded caused by the clamping error of the fixture assembly clamping the workpiece to be welded, or the position deviation of the workpiece to be welded caused by the installation error of the fixture assembly. Wherein, the clamping assembly includes a positioning plate and a lifting member, the workpiece to be welded is clamped between the lifting member and the positioning plate, the positioning plate has a first surface facing the visual positioning system 120, that is, the first surface can be included in the target image, the first surface can be provided with a hollow area located at the center of the first surface, the calibration pattern is provided on the first surface and is located in the non-hollow area outside the hollow area, and the position deviation can refer to the position deviation between the center position corresponding to the hollow area and the center position of the workpiece 140 to be welded.

[0042] like Figure 4-B As shown, the first surface 410 of the positioning plate is provided with a hollow area 420 located at the center of the first surface. When the fixture assembly clamps the workpiece 140 to be welded, the target center position of the workpiece 140 to be welded is the center position corresponding to the hollow area 420. The target center position of the workpiece 140 to be welded refers to the position where the center position of the workpiece 140 to be welded is located when the fixture assembly clamps the workpiece 140 to be welded without clamping error or the fixture assembly does not have an installation error. Among them, when the workpiece 140 to be welded is a cylindrical battery to be welded, and the surface to be welded is the top of the cylindrical battery, the hollow area 420 can be a circular hollow area, and the center position corresponding to the circular hollow area 420 is the center position of the circle. Optionally, the hollow area 420 can be set to other shapes, and the shape of the hollow area 420 can be determined according to the shape of the surface to be welded of the workpiece 140 to be welded.

[0043] Optionally, the visual positioning system 120 can also be used to determine the position deviation of the workpiece to be welded at the target station according to the calibration pattern contained in the target image and the workpiece to be welded. The visual positioning system 120 can determine the center position corresponding to the hollow area and the center position of the workpiece 140 to be welded according to the calibration pattern contained in the target image and the workpiece to be welded, thereby determining the position deviation of the workpiece to be welded at the target station according to the center position corresponding to the hollow area and the center position of the workpiece 140 to be welded. By setting the calibration pattern on the first surface, it can help determine the position deviation and improve the accuracy of the position deviation.

[0044] Optionally, the calibration image may include at least two auxiliary positioning lines, and the intersection position of the extended lines of the at least two auxiliary positioning lines may be the center position corresponding to the hollow area. The visual positioning system 120 may extend each auxiliary positioning line according to the at least two auxiliary positioning lines contained in the target image to determine the intersection position of the extended lines of the at least two auxiliary positioning lines, thereby improving the convenience of determining the center position corresponding to the hollow area and reducing the analysis process of the target image. Optionally, the calibration image may include 2M auxiliary positioning lines, where M may be an integer greater than 1. The 2M auxiliary positioning lines may be divided into M groups, and the two auxiliary positioning lines contained in each group are located on the same straight line. The intersection position of the M straight lines corresponding to the M groups may also be the center position corresponding to the hollow area. The visual positioning system 120 may divide the 2M auxiliary positioning lines contained in the target image into M groups, and then determine the M straight lines corresponding to the M groups, thereby determining the intersection position of the M straight lines corresponding to the M groups. Compared with the method of extending an auxiliary positioning line to obtain a straight line, the implementation of this implementation method uses the two auxiliary positioning lines contained in the same group to determine the straight line, so that the straight line can be made more accurate, thereby more accurately locating the center position corresponding to the hollow area, thereby improving the accuracy of the determined center position corresponding to the hollow area.

[0045] For example Figure 4-B As shown, the visual positioning system 120 can determine four auxiliary positioning lines 430, and the center position corresponding to the hollow area 420 can be determined by any of the above methods.

[0046] Optionally, the lifting member can be used to lift the workpiece to be welded to a target welding height. The lifting member can lift the workpiece to be welded 140 so that the surface to be welded of the workpiece to be welded 140 reaches the target welding height, and the workpiece to be welded is clamped together by the positioning plate and the lifting member located at the target welding height. Optionally, the platform control system can control the drive device to drive the welding rotating platform 110 to rotate so that the target station reaches the position to be lifted and lowered, and the platform control system then controls the lifting member to lift the workpiece to be welded 140 so that the surface to be welded of the workpiece to be welded 140 reaches the target welding height. It should be understood that when the laser welder maintains its posture, there is a horizontal plane at a target welding height. The laser welder welds the surface to be welded at the horizontal plane of the target welding height, which can achieve a better laser welding effect.

[0047] In order to more accurately lift the workpiece 140 to be welded to the target welding height, the positioning plate may optionally further include a second surface opposite to the first surface, and the second surface may also be set at the target welding height. The lifting member is used to lift the workpiece 140 to be welded until it abuts against the second surface, thereby bringing the workpiece 140 to the target welding height. In a specific embodiment, when the workpiece 140 to be welded is a cylindrical battery to be welded, and the surface to be welded is the top of the cylindrical battery, the lifting member may lift the cylindrical battery so that the top of the cylindrical battery abuts against the second surface, thereby bringing the top of the cylindrical battery to the target welding height. Figure 5 As shown, Figure 5 It is a schematic diagram of a lifting and lowering of a workpiece to be welded disclosed in an embodiment of the present application. The lifting member 510 can be lifted and lowered to control the height of the workpiece to be welded 140 so that the workpiece to be welded 140 abuts against the second surface of the positioning plate 520.

[0048] Optionally, a plurality of workstations may also be respectively provided with a support member 530 and a vertical member 540 connected to the support member 530, the vertical member 540 may be connected to the welding rotating platform 110, the support member 530 is used to support the positioning plate 520, specifically, the support member may be detachably connected to the positioning plate 520, and the support member 530 is provided with an air avoidance area corresponding to the hollow area of ​​the positioning plate 520, that is, Figure 5 The middle position of the support member 530 in the welding process. The staff can replace the appropriate positioning plate according to the type of the workpiece 140 to be welded, such as replacing the hollow area of ​​the cylindrical battery with a positioning plate with a circular hollow area, so as to achieve more accurate positioning and welding.

[0049] The laser welding system 130 may include a laser welder, which may be set corresponding to the laser welding area. Here, reference may be made to the contents of the setting of the image acquisition device included in the visual positioning system corresponding to the visual detection area in the above-mentioned embodiment, which will not be described in detail. It should also be understood that although the laser welding area includes a larger range, the laser welding system 130 does not perform laser welding when the target station is at any position in the visual detection area. Instead, when the target station is at the laser welding position in the laser welding area, the laser welding system 130 controls the laser welder to weld the workpiece to be welded after it is rotated to the laser welding area and positioned. Among them, the method for determining the laser welding position of the target station in the laser welding area can refer to the method for determining the visual detection position of the target station in the visual detection area in the above-mentioned embodiment, which will not be described in detail.

[0050] Optionally, the visual inspection area and the laser welding area are separated by N stations, where N is a positive integer, to reserve time for saving and / or processing the target image. The welding rotating platform can rotate to drive the target station to rotate to the visual inspection area first, and then to the laser welding area, so that before each laser welding, the position deviation is first determined by the visual positioning system, so that the laser welder can use a suitable welding trajectory to weld the workpiece to be welded at the target station rotated to the laser welding area, thereby improving the welding quality.

[0051] Optionally, when the platform control system determines that the target station is rotated to the visual inspection area, the platform control system can send the station identification of the target station to the visual positioning system. When the visual positioning system receives the station identification of the target station, it can determine that the target station is rotated to the visual inspection area. The visual positioning system can perform image acquisition on the target station rotated to the visual inspection area to obtain the target image. Optionally, when the platform control system determines that the target station is rotated to the laser welding area, the platform control system can send the station identification of the target station and the corresponding position deviation to the laser welding system. When the laser welding system receives the station identification of the target station and the corresponding position deviation, it can control the laser welder to weld the workpiece to be welded at the target station rotated to the laser welding area according to the position deviation.

[0052] Optionally, the laser welding system 130 may also be communicatively connected with a position detection device. When the position detection device determines that the target station has rotated to the laser welding area, the position detection device may feedback the station identification of the target station to the laser welding system 130. The laser welding system 130 may then request the platform control system to obtain the position deviation corresponding to the station identification of the target station based on the station identification of the target station. The platform control system may control the laser welder to weld the workpiece to be welded at the target station that has rotated to the laser welding area based on the position deviation.

[0053] In the description of this specification, the descriptions with reference to the terms "some embodiments", "other embodiments", "ideal embodiments", etc., mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A welding system, characterized in that: The welding system comprises: A welding rotating platform, the welding rotating platform comprises a plurality of workstations, each of the plurality of workstations is provided with a fixture assembly corresponding thereto, the fixture assembly is used to clamp a workpiece to be welded, a calibration pattern is provided on the surface of the fixture assembly, and the calibration pattern is used to position the workpiece to be welded; A visual positioning system, the visual positioning system is set corresponding to the visual detection area, the visual positioning system is used to collect images of the target station rotated to the visual detection area, obtain a target image including the calibration pattern and the workpiece to be welded, and locate the workpiece to be welded according to the target image; A laser welding system, the laser welding system includes a laser welder, the laser welder is set corresponding to a laser welding area, the laser welding area is different from the visual inspection area, and the laser welding system is used to control the laser welder to weld the workpiece to be welded after being rotated to the laser welding area and positioned.

2. The welding system according to claim 1, characterized in that The welding rotating platform is also used to rotate and drive the target workstation to first rotate to the visual inspection area and then rotate to the laser welding area.

3. The welding system according to claim 1, characterized in that The fixture assembly includes a positioning plate and a lifting member, the workpiece to be welded is clamped between the lifting member and the positioning plate, the positioning plate includes a first surface facing the visual positioning system, a hollow area located in the center of the first surface is provided on the first surface, and the calibration pattern is provided on the first surface and in a non-hollow area located on the periphery of the hollow area.

4. The welding system according to claim 3, characterized in that The hollow area is a circular hollow area.

5. The welding system according to claim 3, characterized in that: The calibration pattern includes at least two auxiliary positioning lines, and the intersection position of the extension lines of the at least two auxiliary positioning lines is the center position corresponding to the hollow area.

6. The welding system according to claim 5, characterized in that The calibration pattern includes 2M auxiliary positioning lines, where M is an integer greater than 1. The 2M auxiliary positioning lines are divided into M groups, and the two auxiliary positioning lines contained in each group are located on the same straight line. The intersection position of the M straight lines corresponding to the M groups is the center position corresponding to the hollow area.

7. The welding system according to claim 3, characterized in that: The positioning plate further includes a second surface opposite to the first surface, and the second surface is set at a target welding height. The lifting member is used to lift the workpiece to be welded until it abuts against the second surface.

8. The welding system according to claim 7, characterized in that A supporting member is respectively provided corresponding to the plurality of workstations, and the supporting member is used to support the fixture assembly, and the supporting member is provided with a void avoidance area corresponding to the hollow area.

9. The welding system according to claim 1, characterized in that: The visual inspection area and the laser welding area are separated by N workstations, where N is a positive integer.

10. The welding system according to claim 1, characterized in that The welding system further comprises a driving device, which is connected to the welding rotating platform and is used to drive the welding rotating platform to keep rotating.

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