High-precision full-automatic laser welding system

Abstract

The utility model provides a high-precision full-automatic laser welding system, and relates to the technical field of precision welding equipment, the high-precision full-automatic laser welding system comprises a PLC (programmable logic controller), and a cantilever type welding frame, a servo rotary welding table and a pressing mechanism which are connected with the PLC, a servo module, a movable air cylinder, a laser welding device and a height difference detection mechanism are arranged on the cantilever, the servo module can drive the laser welding device to move in the first direction, and the movable air cylinder can drive the laser welding device to move in the second direction; the height difference detection mechanism is used for detecting the height difference of the splicing faces of the to-be-welded products, the pressing mechanism is used for pressing the pressing positions of the welding edges of the to-be-welded products during welding, the laser welding device is used for welding the to-be-welded products, high-precision welding of the products is met, and the welding efficiency and the welding quality are greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of precision welding equipment, and in particular to a high-precision fully automatic laser welding system. Background Art

[0002] In the process of industrial development, there are always some technological breakthroughs leading the global change. Green hydrogen, an important part of future green energy, is one of them. As the core equipment of green hydrogen, the electrolyzer has entered a period of accelerated order growth. The demand for hydrogen production equipment at home and abroad is growing, requiring high precision and high quality products. Traditional welding technology cannot efficiently achieve the welding of high-precision products, and traditional welding technology has large welding deformation, low precision, and produces welding slag, cold welding and other undesirable phenomena. How to provide a solution for high-precision automated laser welding of high-precision welding products is a problem that needs to be solved urgently. Summary of the invention

[0003] In view of this, the embodiments of this specification provide a high-precision fully automatic laser welding system that meets the requirements of high-precision welding of products and greatly improves welding efficiency and welding quality.

[0004] The embodiments of this specification provide the following technical solutions:

[0005] The high-precision fully automatic laser welding system includes a PLC controller and a cantilever welding frame, a servo rotary welding table and a clamping mechanism all connected to the PLC controller, wherein the cantilever welding frame at least includes a cantilever extending along a first direction, and the cantilever is provided with a servo module, a movable cylinder, a laser welder and a height difference detection mechanism, the servo module can drive the laser welder to move along the first direction, the movable cylinder can drive the laser welder to move along the second direction, the height difference detection mechanism is used to detect the height difference of the joint surface of the product to be welded, the clamping mechanism is used to clamp the welding edge clamping position of the product to be welded during welding, and the laser welder is used to weld the product to be welded.

[0006] In some embodiments, the cantilever welding frame further includes a fixing frame extending along the second direction, the second direction is perpendicular to the first direction, and the upper portion of the fixing frame, a portion of the cantilever and the oblique bracket form a tripod structure.

[0007] In some embodiments, the system further includes a split wire feeding mechanism, which includes a wire feeding mechanism and a wire feeding reel, wherein the wire feeding mechanism and the wire feeding reel are separately arranged on the fixed frame, and the wire feeding mechanism is arranged close to the cantilever.

[0008] In some embodiments, the clamping mechanism includes a clamping cylinder and a clamping ring, and the clamping cylinder can drive the clamping ring to clamp at a predetermined distance from the welding edge of the product to be welded.

[0009] In some embodiments, the predetermined distance from the welding edge is 10 mm from the welding edge.

[0010] In some embodiments, the servo rotary welding table includes a servo rotary table and an anti-backlash mechanism, and the anti-backlash mechanism is used to adjust and compensate for the accuracy of a servo motor of the servo rotary table.

[0011] In some embodiments, the height difference detection mechanism includes a height difference detection cylinder and a height measurement sensor. The height difference detection cylinder can drive the height measurement sensor to detect and obtain the height difference of the joint surfaces of the products to be welded.

[0012] In some embodiments, a visual detection mechanism is also provided on the cantilever. When the PLC controller receives feedback from the height measurement sensor that the height difference of the joint surface of the product to be welded is within a predetermined height difference range, the visual detection mechanism is triggered to detect the gap at the joint of the product to be welded.

[0013] In some embodiments, the PLC controller triggers the servo module to drive the laser welder to move and compensate for the gap at the joint based on the gap at the joint fed back by the visual detection mechanism.

[0014] In some embodiments, the predetermined height difference range is less than 0.2 mm.

[0015] Compared with the prior art, the above technical solutions adopted in the embodiments of this specification can achieve at least the following beneficial effects:

[0016] 1. In order to ensure that the height difference of the product at the joint meets the high-precision welding height difference requirements, the height difference detection mechanism is first driven by the cylinder to detect the height difference between the two sides of the joint;

[0017] 2. Secondly, visual technology is further used to detect and compensate the gap difference at the joint by driving the servo module, triggering the servo module to drive the laser welder to move to compensate for the gap at the joint, so as to further ensure the final high-precision welding;

[0018] 3. In addition, in order to save space and save welding wire, a split wire feeding mechanism is adopted, and the wire feeding mechanism and the wire feeding reel are fixed separately by the suspension, so that the wire feeding path is shorter, which saves space and makes the wire feeding mechanism closer to the laser welding nozzle, thereby achieving the purpose of saving welding wire;

[0019] 4. In order to prevent product welding deformation, the cylinder is used to drive the clamping ring to clamp the corresponding distance of the edge of the product welding, and to shape the product splicing plane to achieve better welding quality;

[0020] 5. In order to meet the welding speed requirements, a servo turntable is used to drive the product to rotate and weld. It can rotate and weld one circle every 5 minutes, which improves the welding efficiency;

[0021] 6. The laser welder is driven by the cantilever welding arm of the servo module, achieving compatibility with welding of products of different sizes.

[0022] In summary, this application has developed a fully automatic welding equipment that can automatically rotate welding, automatically detect whether the product meets the welding conditions, and automatically compensate and shape the welding; it meets the high-precision welding of products and greatly improves the welding efficiency and welding quality. In particular, it can meet the welding quality requirements of the electrolyzer of the core equipment of green hydrogen, and provides it with an excellent fully automatic laser welding system, and can meet the increasing demand for high-precision welding mass production. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of 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.

[0024] Figure 1 It is a structural schematic diagram of a high-precision fully automatic laser welding system provided in an embodiment of the present application;

[0025] Figure 2 yes Figure 1 Front view of medium and high precision fully automatic laser welding system;

[0026] Figure 3 yes Figure 1 Left view of the medium and high precision fully automatic laser welding system;

[0027] Figure 4 It is a partial structural schematic diagram of a high-precision fully automatic laser welding system provided in an embodiment of the present application;

[0028] Figure 5 It is a partial structural schematic diagram of a high-precision fully automatic laser welding system provided in an embodiment of the present application;

[0029] Figure 6 It is a partial structural schematic diagram of a high-precision fully automatic laser welding system provided in an embodiment of the present application;

[0030] Figure 7It is a schematic diagram of the partial structure of the high-precision fully automatic laser welding system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0031] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0032] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0033] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspect described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0034] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0035] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the examples can be practiced without these specific details.

[0036] The high-precision fully automatic laser welding system provided in the embodiment of the present application includes a PLC controller (as a master control, not shown in the figure) and a cantilever welding frame 1, a servo rotary welding table 2 and a clamping mechanism 3, all of which are connected to the PLC controller.

[0037] Specifically, the cantilever welding frame 1 at least includes a cantilever 11 extending along a first direction (the first direction is indicated along the X-axis direction for convenience of description and is not limited thereto), and a servo module 4, a moving cylinder 5, a laser welder 6 and a height difference detection mechanism 7 are provided on the cantilever 11. The servo module 4 can drive the laser welder 6 to move along the X-axis direction, and the moving cylinder 5 can drive the laser welder 6 to move along a second direction (the first direction is indicated along the Z-axis direction for convenience of description and is not limited thereto) so that the laser welder 6 reaches a precise welding position. In order to be compatible with the welding of products of different sizes, the cantilever welding frame 1 and the cantilever 11 can be set with corresponding structural dimensions, so that the servo module 4 drives the laser welder 6 to be compatible with welding products with a diameter of 1.4m-2.25m.

[0038] At this time, the product to be welded has also entered the laser welding station through the roller. The roller falls so that the product falls on the servo rotary welding table 2. The product position can be accurately positioned by the welding table positioning pin (not shown in the figure), and then the height difference of the splicing surface of the product to be welded is detected by the height difference detection mechanism 7, for example, the height difference between the two splicing surfaces of the product to be welded, so as to ensure that the positioning position of the splicing surface of the product to be welded meets the high-precision welding positioning requirements, and then the clamping mechanism 3 clamps the welding edge of the product to be welded during welding to ensure that the laser welder 6 completes the high-precision welding of the product to be welded.

[0039] In some embodiments, the cantilever welding frame 1 also includes a fixed frame 12 extending along the Z-axis direction (i.e., the second direction), the second direction (i.e., represented as the Z-axis direction) is perpendicular to the first direction (i.e., represented as the X-axis direction), and the upper part of the fixed frame 12 and the part of the cantilever 1 and the oblique bracket 13 form a tripod structure. The cantilever welding frame 1 with this structural setting is convenient for installing components such as the servo module 4, the mobile cylinder 5, the laser welder 6 and the height difference detection mechanism 7, and can also improve the stability of the overall system structure.

[0040] In some embodiments, in order to save space requirements and save welding wire, the high-precision fully automatic laser welding system also includes a split wire feeding mechanism 8, the split wire feeding mechanism 8 includes a wire feeding mechanism 81 and a wire feeding reel 82, the wire feeding mechanism 81 and the wire feeding reel 82 are respectively and separately arranged on the fixed frame 12, and the wire feeding mechanism 81 is arranged close to the cantilever 11, for example, the wire feeding mechanism 81 is arranged on the upper part of the fixed frame 12, and the wire feeding reel 82 is arranged on the lower part of the fixed frame 12.

[0041] In some embodiments, the clamping mechanism 3 includes a clamping cylinder 31 and a clamping ring 32. The clamping cylinder can drive the clamping ring 31 to clamp at a predetermined distance from the welding edge of the product to be welded. In some embodiments, the predetermined distance from the welding edge of the product to be welded is 10 mm from the welding edge.

[0042] In some embodiments, in order to ensure the precision of the rotational welding of the servo rotary welding table 2, the servo rotary welding table 2 is provided with a backlash elimination mechanism 22 in addition to the servo rotary table 21. The backlash elimination mechanism 22 can adjust and compensate for the precision of the servo motor (not shown in the figure) of the servo rotary table 21, so that the rotational welding precision of the servo rotary table 21 can better meet the standards, and when the transmission gear of the servo rotary table 21 is worn in the later stage, the backlash elimination mechanism 22 can be adjusted to compensate for the precision.

[0043] In addition, in some embodiments, the height difference detection mechanism 7 further includes a height difference detection cylinder 71 and a height measurement sensor 72, wherein the height difference detection cylinder 71 can drive the height measurement sensor 72 to detect and obtain the height difference data of the joint surface of the product to be welded. In some embodiments, the height measurement sensor 72 can be a high-precision digital contact sensor.

[0044] Preferably, in some embodiments, a visual inspection mechanism 9 is also provided on the cantilever 11. When the PLC controller receives feedback from the height measurement sensor 72 that the height difference of the joint surface of the product to be welded is within a predetermined height difference range, the predetermined height difference range can preferably be controlled to be less than 0.2 mm, that is, when it is first determined that the height difference of the joint surface of the product to be welded meets the required accuracy range of the height difference welding, the visual inspection mechanism 9 can be triggered to further detect the gap at the joint of the product to be welded. Further preferably, if it is determined that the gap at the joint of the product to be welded is too large and does not meet the requirements of precision welding, the PLC controller triggers the servo module 4 to drive the laser welder 6 to move to compensate for the gap at the joint according to the gap at the joint feedback from the visual inspection mechanism 9, so as to further ensure the final high-precision welding.

[0045] Exemplarily, the high-precision fully automatic laser welding system provided in the embodiment of the present application can work in the following manner:

[0046] Step 1: First, the product to be welded enters the laser welding station through a roller, and the roller falls so that the product to be welded falls onto the servo rotating table 21, and the product position is accurately positioned by the welding table positioning pin;

[0047] Step 2, the clamping cylinder 31 drives the clamping ring 32 to fall and clamp the welding edge of the product to be welded at 10 mm;

[0048] Step 3, the servo module 4 drives the laser welder 6 to the top of the welding point, the servo rotary table 21 starts to idle at a constant speed, the height difference detection cylinder 71 extends to drive the height measurement sensor 72 to contact the joint surface of the product to be welded, and detects whether the height difference between the two surfaces is less than 0.2mm. If it is less than 0.2mm, it will continue to the next step, otherwise it will be NG; while the height difference detection mechanism 7 is working, the visual detection mechanism 9 starts to take pictures to detect the gap at the joint, and transmits the data to the PLC controller;

[0049] Step 4: After the servo rotating table 21 idles for one circle and the detection is completed, the movable cylinder 5 extends to drive the laser welder 6 to fall to the optimal welding position (i.e. the welding positioning position confirmed by calculation), the laser controller 6 starts the laser emission, and at the same time, the servo rotating table 21 rotates at a constant speed, and the wire feeding mechanism 81 starts to feed the wire at a constant speed synchronously. The servo module 4 receives the signal of the visual detection mechanism 9 and moves to compensate the gap at the splicing according to the detection result. The servo rotating table 21 rotates one circle, and the welding is completed.

[0050] Step 5: Return all mechanisms to their original positions.

[0051] In this specification, the same or similar parts between the various embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. At the same time, this specification uses specific words to describe the embodiments of this specification. For example, "one embodiment", "one embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of this specification. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different locations in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures or characteristics in one or more embodiments of this specification can be appropriately combined.

[0052] In addition, unless explicitly stated in the claims, the order of the processing elements and sequences described in this specification, the use of alphanumeric characters, or the use of other names are not intended to limit the order of the processes and methods of this specification. Although the above disclosure discusses some invention embodiments that are currently considered useful through various examples, it should be understood that such details are only for illustrative purposes, and the attached claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that are consistent with the essence and scope of the embodiments of this specification. For example, although the system components described above can be implemented by hardware devices, they can also be implemented only by software solutions, such as installing the described system on an existing processing device or mobile device.

[0053] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of this specification. Although not explicitly stated here, those skilled in the art may make various modifications, improvements and corrections to this specification. Such modifications, improvements and corrections are suggested in this specification, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of this specification.

Claims

1. A high-precision fully automatic laser welding system, characterized in that: It includes a PLC controller and a cantilever welding frame, a servo rotary welding table and a clamping mechanism all connected to the PLC controller, wherein the cantilever welding frame at least includes a cantilever extending along a first direction, and the cantilever is provided with a servo module, a movable cylinder, a laser welder and a height difference detection mechanism, the servo module can drive the laser welder to move along the first direction, the movable cylinder can drive the laser welder to move along the second direction, the height difference detection mechanism is used to detect the height difference of the joint surface of the product to be welded, the clamping mechanism is used to clamp the welding edge clamping position of the product to be welded during welding, and the laser welder is used to weld the product to be welded.

2. The high-precision fully automatic laser welding system according to claim 1 is characterized in that: The cantilever welding frame also includes a fixing frame extending along the second direction, the second direction is perpendicular to the first direction, and the upper part of the fixing frame, a part of the cantilever and the oblique bracket form a tripod structure.

3. The high-precision fully automatic laser welding system according to claim 2 is characterized in that: The system also includes a split wire feeding mechanism, which includes a wire feeding mechanism and a wire feeding disc. The wire feeding mechanism and the wire feeding disc are separately arranged on the fixed frame, and the wire feeding mechanism is arranged close to the cantilever.

4. The high-precision fully automatic laser welding system according to claim 1 is characterized in that: The clamping mechanism comprises a clamping cylinder and a clamping ring, and the clamping cylinder can drive the clamping ring to clamp at a predetermined distance from the welding edge of the product to be welded.

5. The high-precision fully automatic laser welding system according to claim 4 is characterized in that: The predetermined distance from the welding edge is 10 mm from the welding edge.

6. The high-precision fully automatic laser welding system according to claim 1 is characterized in that: The servo rotary welding table comprises a servo rotary table and an anti-backlash mechanism, wherein the anti-backlash mechanism is used to adjust and compensate for the precision of the servo motor of the servo rotary table.

7. The high-precision fully automatic laser welding system according to any one of claims 1 to 6, characterized in that: The height difference detection mechanism includes a height difference detection cylinder and a height measurement sensor. The height difference detection cylinder can drive the height measurement sensor to detect and obtain the height difference of the joint surface of the product to be welded.

8. The high-precision fully automatic laser welding system according to claim 7, characterized in that: The cantilever is also provided with a visual detection mechanism. When the PLC controller receives feedback from the height measurement sensor that the height difference of the joint surface of the product to be welded is within a predetermined height difference range, the visual detection mechanism is triggered to detect the gap at the joint of the product to be welded.

9. The high-precision fully automatic laser welding system according to claim 8, characterized in that: The PLC controller triggers the servo module to drive the laser welder to move and compensate for the gap at the joint based on the gap at the joint fed back by the visual detection mechanism.

10. The high-precision fully automatic laser welding system according to claim 8, characterized in that: The predetermined height difference range is less than 0.2 mm.

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