A laser welding positioning device

Abstract

The application discloses a laser welding positioning device, a bottom plate, a rotary table, positioning columns, a clamping mechanism, a driving assembly and a welding assembly; the rotary table is arranged on the bottom plate and can be driven to rotate by a motor; the positioning columns are arranged in plurality and can fix the welding pieces at the bottom; the clamping mechanism is movably arranged on the rotary table and is arranged in plurality and circumferentially on the rotary table; the opposite clamping mechanisms can clamp the welding pieces at the top; the welding assembly is arranged on the bottom plate; the driving assembly is fixedly arranged on the bottom plate; when the clamping mechanism passes through the driving assembly, the clamping mechanism can be away from the welding pieces, and the clamping mechanism can be automatically reset after leaving the driving assembly. The laser welding positioning device can clamp the welding pieces from the side and make the clamping mechanism away from the welding pieces one by one when laser welding is performed, so that the interference with the welding gun is avoided.

Description

Technical Field

[0001] This invention belongs to the field of laser welding technology, and more specifically, relates to a laser welding positioning device. Background Technology

[0002] In modern industrial manufacturing, laser welding technology, with its significant advantages of high precision and high efficiency, is widely used in many industries such as automotive, aerospace, and electronics. Accurate positioning of the workpiece is a core prerequisite for ensuring welding quality during laser welding; therefore, the performance of the laser welding positioning device directly affects welding accuracy and production efficiency.

[0003] To ensure the smooth progress of laser welding, the positioning device must not only securely fix the weldment but also avoid interference with the welding structure to prevent adverse effects on the welding path and welding results. In existing technologies, the commonly used positioning method to address this requirement is to fix the top of the weldment. This top-fixing method, by setting appropriate clamping or pressing structures on the top of the weldment, can effectively fix weldments with regular structures, flat tops, and no special construction. In conventional welding scenarios, it exhibits the characteristics of simple operation and stable positioning, and to a certain extent meets the welding positioning needs of ordinary weldments.

[0004] However, with the diversification of industrial product structures, the structural forms of welded parts are becoming increasingly complex. In actual production, there are a large number of welded parts with open or irregular top structures. For example, some tubular welded parts have through openings at the top, or some welded parts with irregular contours have uneven and oddly shaped structures at the top. For these types of welded parts, traditional top fixing methods face significant challenges: open top structures cannot provide stable clamping or pressing fulcrums, making effective fixing difficult; while irregular structures make it impossible for conventional top fixing devices to fit the top of the welded part, not only failing to guarantee the reliability of the fixing, but also potentially further damaging the irregular structure of the welded part or affecting the welding operation due to structural interference.

[0005] It is evident that traditional top-fixing methods are insufficient to meet the positioning requirements of welded parts with open or irregular top structures, necessitating a new laser welding positioning device to solve this technical challenge. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a laser welding positioning device to solve the technical problem mentioned in the background art of difficulty in avoiding interference with the welding torch by fixing the top of the welded part.

[0007] To achieve the aforementioned objectives, the technical solution adopted by this invention includes:

[0008] A laser welding positioning device, characterized in that: a base plate, a turntable, a positioning column, a clamping mechanism, a driving assembly, and a welding assembly;

[0009] The turntable is mounted on the base plate and can be driven to rotate by a motor. The positioning column is provided with multiple welded parts that can fix the bottom.

[0010] The clamping mechanism is movably mounted on the turntable. Multiple clamping mechanisms are provided and circumferentially mounted on the turntable. The corresponding clamping mechanisms can clamp the welded parts on the top.

[0011] The welding assembly is disposed on the base plate, the driving assembly is fixed on the base plate, the clamping mechanism can move away from the weldment when passing the driving assembly, and can automatically reset after leaving the driving assembly.

[0012] Furthermore, the clamping mechanism includes a clamping component, a transmission component, and a limiting component; the clamping component is slidably disposed on the turntable, and the two opposing clamping components can clamp the weldment; the transmission component and the limiting component are respectively rotatably connected to the turntable, the forward rotation of the transmission component can drive the clamping component to move closer to the weldment, and the reverse rotation of the transmission component can drive the clamping component to move away from the weldment, and the limiting component can restrict the reverse rotation of the transmission component; during the rotation of the turntable, the driving component first moves the limiting component away from the transmission component, and then drives the transmission component to reverse.

[0013] Furthermore, the clamping assembly includes a clamping connecting plate, a clamping rack, and a clamping plate; the clamping connecting plate is fixedly mounted on the turntable, the clamping rack is slidably connected to the clamping connecting plate, the forward rotation of the transmission assembly can drive the rack closer to the weldment, and the reverse rotation of the transmission assembly can move the rack away from the weldment; the clamping plate is fixedly mounted on the rack near one end of the weldment.

[0014] Furthermore, the transmission assembly includes a transmission shaft, a first gear, a second gear, a ratchet, and a first torsion spring; the transmission shaft is rotatably connected to the turntable, the first gear, the second gear, and the ratchet are coaxially fixed on the transmission shaft, the first gear meshes with the clamping rack, the second gear can reverse when passing the drive assembly, the limiting assembly can restrict the ratchet from reversing, one end of the first torsion spring is connected to the turntable, and the other end is connected to the ratchet.

[0015] Furthermore, the limiting assembly includes a limiting shaft, a pawl, a second torsion spring, and a driven rod; the limiting shaft is disposed on the turntable, the pawl is rotatably disposed on the limiting shaft and connected to the turntable through the second torsion spring, and the pawl can restrict the ratchet from reversing; the driven rod is fixed on the pawl, and when the driven rod passes through the driving assembly, it can drive the pawl to rotate away from the ratchet.

[0016] Furthermore, the drive assembly includes a fixed plate, an arc-shaped rack, and an arc-shaped wedge; the fixed plate is fixed to the turntable, the arc-shaped rack and the arc-shaped wedge are respectively fixed to the fixed plate, the arc-shaped rack can mesh with the second gear, and the arc-shaped wedge can press the driven rod, driving the pawl to rotate. Furthermore, the welding assembly includes a welding frame and a welding gun; the welding frame is fixed to the base plate, and the welding gun is mounted on the welding frame.

[0017] Furthermore, the clamping plate is provided with a flexible pad on the side near the welded part.

[0018] Compared with the prior art, the advantages of the present invention include:

[0019] By clamping the side of the weldment, there is no need to fix the top; the drive component allows the clamping component to move away from the weldment as it passes the drive component, so that the clamping component will not interfere with the weldment. Therefore, by setting the drive component to move away from only one clamping mechanism at a time, interference with the weldment can be avoided while maintaining the overall clamping state of the weldment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an overall schematic diagram of a laser welding positioning device according to the present invention;

[0022] Figure 2 This is a schematic diagram of the clamping mechanism in this invention;

[0023] Figure 3 This is a schematic diagram of the driving component in this invention.

[0024] Figure label:

[0025] Base plate 1, turntable 2, motor 21, positioning column 3, clamping mechanism 4, clamping assembly 41, clamping connecting plate 411, clamping rack 412, clamping plate 413, transmission assembly 42, transmission shaft 421, first gear 422, second gear 423, ratchet 424, first torsion spring 425, limiting assembly 43, limiting shaft 431, pawl 432, second torsion spring 433, driven rod 434, drive assembly 5, fixing plate 51, arc rack 52, arc wedge 53, welding assembly 6, welding frame 61, welding gun 62. Detailed Implementation

[0026] In view of the shortcomings of the prior art, the inventors of this case, through long-term research and extensive practice, have proposed the technical solution of this invention. The technical solution, its implementation process, and principles will be further explained below with reference to the accompanying drawings and specific implementation examples in the embodiments of this application.

[0027] It should be noted that the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, the present invention covers any substitutions, modifications, equivalent methods and solutions made on the spirit, principles and scope of the present invention as defined by the claims. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this application, the terms "first," "second," "third," and similar words do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," and similar words, do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including," and similar words, mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including," and their equivalents, but do not exclude other elements or objects. The terms "connected" or "linked," and similar words, are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0029] In the description of this application, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, when using positional terms such as "both sides," "outer side," and "upper and lower," it should be understood that they are used only for ease of understanding and description, taking into account that the structure may be oriented to other positions.

[0030] In the description of this application, unless otherwise expressly specified and limited, the technical or scientific terms used shall have the ordinary meaning understood by a person with ordinary skills in the art to which this application pertains. Terms such as “installation,” “connection,” and “joining” shall be interpreted broadly, for example, as fixed connection, detachable connection, mating connection, or integral connection. For a person skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0031] The present invention aims to introduce and explain the structural composition of a laser welding positioning device and the cooperation relationship between the various components. Unless otherwise specified, the dimensions, materials and manufacturing processes of the various components in the laser welding positioning device in the present invention can be selected according to specific circumstances, and no special limitations or explanations are made here.

[0032] Furthermore, to provide the public with a better understanding of the present invention, certain specific details are described in detail in the following description of the invention. However, those skilled in the art will fully understand the invention even without these detailed descriptions.

[0033] Please refer to the following: Figures 1-3 This embodiment provides a laser welding positioning device, characterized by: a base plate 1, a turntable 2, a positioning column 3, a clamping mechanism 4, a driving assembly 5, and a welding assembly 6;

[0034] The turntable 2 is mounted on the base plate 1 and can be driven to rotate by the motor 21. Multiple positioning posts 3 are provided to fix the bottom welded parts. Specifically, the base plate 1 has the motor 21, which rotates the turntable 2. In this embodiment, the turntable 2 is a disc and is coaxially fixed to the output shaft of the motor 21. This device is used to weld two welded parts. The bottom welded part is placed on the turntable 2 and fixed by the surrounding positioning posts 3, while the other welded part is placed on the top surface of the bottom welded part.

[0035] The clamping mechanism 4 is movably mounted on the turntable 2. Multiple clamping mechanisms 4 are provided and circumferentially mounted on the turntable 2. The opposing clamping mechanisms 4 can clamp the welded parts on the top. Specifically, the clamping mechanisms 4 are provided in even groups and are arranged opposite each other in pairs. The clamping mechanisms 4 can rotate together with the turntable 2.

[0036] The welding assembly 6 is mounted on the base plate 1, and the drive assembly 5 is fixed on the base plate 1. The clamping mechanism 4 moves away from the welding part when passing the drive assembly 5, and automatically resets after leaving the drive assembly 5. Specifically, the welding assembly 6 welds the bottom of the top welding part, welding the upper and lower welding parts together. When the clamping assembly 41 moves away from the welding part, it will not interfere with the welding machine assembly during the rotation of the turntable 2, allowing the welding to proceed normally.

[0037] In this application, by clamping the side of the welded part, there is no need to fix the top; the drive component 5 enables the clamping component 41 to move away from the welded part when passing the drive component 5, so that the clamping component 41 will not interfere with the welded component 6. Therefore, by setting the drive component 5 to drive only one clamping mechanism 4 away at a time, interference with the welded component 6 can be avoided while maintaining the overall clamping state of the welded part.

[0038] In other embodiments, the clamping mechanism 4 includes a clamping component 41, a transmission component 42, and a limiting component 43. The clamping component 41 is slidably mounted on the turntable 2, and two opposing clamping components 41 can clamp the weldment. The transmission component 42 and the limiting component 43 are rotatably connected to the turntable 2. The forward rotation of the transmission component 42 can drive the clamping component 41 to move closer to the weldment, and the reverse rotation of the transmission component 42 can drive the clamping component 41 to move away from the weldment. The limiting component 43 can restrict the reverse rotation of the transmission component 42. During the rotation of the turntable 2, the drive component 5 first moves the limiting component 43 away from the transmission component 42, and then drives the transmission component 42 to reverse.

[0039] It should also be understood that the limiting component 43 and the transmission component 42 can automatically reset after leaving the drive mechanism. The limiting component 43 restricts the transmission component 42 from reversing, and the transmission component 42 rotates forward again, driving the clamping component 41 to move closer to the weldment and clamp it. It is also worth mentioning that the transmission component 42 leaves the drive component 5 first, and the limiting component 43 leaves the drive component 5 afterward. Moreover, the limiting component 43 leaves the drive component 5 before the clamping component 41 clamps the weldment. Specifically, in this embodiment, the forward rotation of the transmission component 42 is clockwise, and the reverse rotation of the transmission component 42 is counterclockwise.

[0040] In other embodiments, the clamping assembly 41 includes a clamping connecting plate 411, a clamping rack 412, and a clamping plate 413. The clamping connecting plate is fixed on the turntable 2, and the clamping rack 412 is slidably connected to the clamping connecting plate 411. The forward rotation of the transmission assembly 42 can drive the rack closer to the weldment, and the reverse rotation of the transmission assembly 42 can drive the rack away from the weldment. The clamping plate 413 is fixed on the rack near one end of the weldment. Specifically, the clamping connecting plate 411 is provided with a sliding groove, and the clamping rack 412 is slidably connected to the rack. It should also be understood that the movement of the rack will inevitably drive the rotation of the transmission assembly 42.

[0041] In other embodiments, the transmission assembly 42 includes a transmission shaft 421, a first gear 422, a second gear 423, a ratchet 424, and a first torsion spring 425. The transmission shaft 421 is rotatably connected to the turntable 2. The first gear 422, the second gear 423, and the ratchet 424 are coaxially fixed on the transmission shaft 421. The first gear 422 meshes with the clamping rack 412. The second gear 423 can reverse direction when passing the drive assembly 5. The limiting assembly 43 can restrict the ratchet 424 from reversing. One end of the first torsion spring 425 is connected to the turntable 2, and the other end is connected to the ratchet 424. It should be understood that the first gear 422 is always meshed with the clamping rack 412.

[0042] In other embodiments, the limiting assembly 43 includes a limiting shaft 431, a pawl 432, a second torsion spring 433, and a driven rod 434. The limiting shaft 431 is mounted on the turntable 2, and the pawl 432 is rotatably mounted on the limiting shaft 431 and connected to the turntable 2 via the second torsion spring 433. The pawl 432 can restrict the ratchet 424 from reversing. The driven rod 434 is fixed to the pawl 432, and when the driven rod 434 passes through the drive assembly 5, it can drive the pawl 432 to rotate away from the ratchet 424. That is, the transmission assembly 42 and the limiting assembly 43 can be regarded as a ratchet 424 and pawl 432 mechanism.

[0043] In other embodiments, the drive assembly 5 includes a fixed plate 51, an arc-shaped rack 52, and an arc-shaped wedge 53. The fixed plate 51 is fixed on the turntable 2, and the arc-shaped rack 52 and the arc-shaped wedge 53 are respectively fixed on the fixed plate 51. The arc-shaped rack 52 can mesh with the second gear 423, and the arc-shaped wedge 53 can press the driven rod 434, causing the pawl 432 to rotate. It should be understood that the fixed plate 51 is an arc-shaped plate, and the fixed plate 51, the arc-shaped rack 52, and the arc-shaped wedge 53 are coaxial with the turntable 2. At the same time, the two ends of the arc-shaped wedge 53 are located on both sides of the arc-shaped rack 52, so that the driven rod 434 contacts the transmission assembly 42 before the second gear 423 and moves away from the transmission assembly 42 after the second gear 423.

[0044] In other embodiments, the welding assembly 6 includes a welding frame 61 and a welding gun 62; the welding frame 61 is fixed on the base plate 1, and the welding gun 62 is mounted on the welding frame 61.

[0045] In other designs, the clamping plate 413 also has a flexible pad on the side near the weldment. The flexible pad provides cushioning space while preventing damage to the surface of the weldment.

[0046] The aforementioned laser welding positioning device can clamp the workpiece from the side and move the clamping mechanism away from the workpiece one by one during laser welding to avoid interference with the welding torch.

[0047] It should be understood that the above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It should not be considered that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, several simple deductions or substitutions can be made without departing from the concept of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A laser welding positioning device, characterized in that: Base plate, turntable, positioning column, clamping mechanism, drive assembly and welding assembly; The turntable is mounted on the base plate and can be driven to rotate by a motor. The positioning column is provided with multiple welded parts that can fix the bottom. The clamping mechanism is movably mounted on the turntable. Multiple clamping mechanisms are provided and circumferentially mounted on the turntable. The opposing clamping mechanisms can clamp the welded parts on the top. The welding assembly is disposed on the base plate, the driving assembly is fixed on the base plate, the clamping mechanism can move away from the weldment when passing the driving assembly, and can automatically reset after leaving the driving assembly; The clamping mechanism includes a clamping component, a transmission component, and a limiting component. The clamping component is slidably mounted on the turntable, and two opposing clamping components can clamp the weldment. The transmission component and the limiting component are rotatably connected to the turntable. The forward rotation of the transmission component can drive the clamping component closer to the weldment, and the reverse rotation of the transmission component can drive the clamping component away from the weldment. The limiting component can restrict the reverse rotation of the transmission component. During the rotation of the turntable, the driving component first moves the limiting component away from the transmission component, and then drives the transmission component to reverse. The clamping assembly includes a clamping connecting plate, a clamping rack, and a clamping plate; the clamping connecting plate is fixedly mounted on the turntable, and the clamping rack is slidably connected to the clamping connecting plate; the forward rotation of the transmission assembly can drive the rack closer to the weldment, and the reverse rotation of the transmission assembly can move the rack away from the weldment; the clamping plate is fixedly mounted on the rack at one end close to the weldment. The transmission assembly includes a transmission shaft, a first gear, a second gear, a ratchet, and a first torsion spring; the transmission shaft is rotatably connected to the turntable, the first gear, the second gear, and the ratchet are coaxially fixed on the transmission shaft, the first gear meshes with the clamping rack, the second gear can reverse when passing the drive assembly, the limiting assembly can restrict the ratchet from reversing, one end of the first torsion spring is connected to the turntable, and the other end is connected to the ratchet; The limiting assembly includes a limiting shaft, a pawl, a second torsion spring, and a driven rod; the limiting shaft is disposed on the turntable, the pawl is rotatably disposed on the limiting shaft and connected to the turntable through the second torsion spring, and the pawl can restrict the ratchet from reversing; the driven rod is fixed on the pawl, and when the driven rod passes through the driving assembly, it can drive the pawl to rotate away from the ratchet; The drive assembly includes a fixed plate, an arc-shaped rack, and an arc-shaped wedge. The fixed plate is fixed on the turntable, and the arc-shaped rack and the arc-shaped wedge are respectively fixed on the fixed plate. The arc-shaped rack can mesh with the second gear, and the arc-shaped wedge can squeeze the driven rod, thereby driving the pawl to rotate.

2. The laser welding positioning device according to claim 1, characterized in that: The welding assembly includes a welding frame and a welding gun; the welding frame is fixed on the base plate, and the welding gun is mounted on the welding frame.

3. The laser welding positioning device according to claim 2, characterized in that: The clamping plate is also provided with a flexible pad on the side near the welded part.

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