Automatic thin plate shearing butt laser welding device with pre-deformation correction function

Abstract

The present application belongs to the technical field of sheet welding, especially a sheet automatic shearing butt laser welding device with pre-deformation correction function. In view of the problem that the existing sheet welding device has no pre-deformation correction function, the present application provides the following scheme, which comprises a welding rack body and two machining platforms; two pre-deformation correction mechanisms are arranged on the top of the two machining platforms respectively for correction work; two automatic butt mechanisms are arranged on the bottom of the two machining platforms respectively for butt work; and a laser shearing welding device is arranged on the left side of the pre-deformation correction mechanism for laser shearing and welding work. The present application provides a sheet laser welding device capable of realizing shearing and welding integration, having pre-deformation correction function and high automation degree, thereby improving work efficiency and work effect.

Description

Technical Field

[0001] This application relates to the field of thin plate welding technology, and in particular to an automatic shearing and butt welding laser welding device for thin plates with pre-deformation correction function. Background Technology

[0002] Thin sheet materials are widely used in sheet metal processing, precision hardware, new energy housings, and aerospace thin-walled components. In the processing of thin sheets, butt shearing and laser welding are core procedures. Due to their small thickness, weak rigidity, and high heat sensitivity, thin sheets are prone to defects such as warping, bending, and elastic deformation before conveying, positioning, and welding. Direct butt shearing and laser welding can lead to uneven gaps and large misalignments in the butt joints, ultimately resulting in inconsistent weld widths, significant weld deformation, and insufficient weld strength, severely impacting product processing accuracy and finished product yield.

[0003] Most existing traditional thin plate welding equipment only has simple positioning, clamping, and laser welding functions, lacking a pre-deformation correction structure before welding. This makes it impossible to accurately level and correct warping and deformation of thin plates, and difficult to eliminate butt joint errors caused by the plate's own deformation. Furthermore, traditional equipment relies heavily on manual alignment or simple limiting positioning for plate butt jointing, resulting in low automation, poor butt joint accuracy, and an inability to achieve precise automatic butt jointing. Additionally, the shearing, butt jointing, correction, and welding processes have poor continuity, leading to low processing efficiency and making it difficult to meet the production needs of high-precision batch welding of thin plates.

[0004] Therefore, in order to address the shortcomings of existing thin plate welding equipment, such as lack of pre-deformation correction function, low docking accuracy, poor processing consistency, and low process integration, an automatic shearing and docking laser welding device for thin plates with pre-deformation correction function is proposed. Summary of the Invention

[0005] To address the lack of pre-deformation correction function in existing thin plate welding devices, this application provides an automatic shearing and butt welding laser welding device for thin plates with pre-deformation correction function.

[0006] The automatic shearing and butt welding laser welding device for thin plates with pre-deformation correction function provided in this application adopts the following technical solution: A laser welding device for automatic shearing and butt welding of thin plates with pre-deformation correction function includes: a welding frame body and two processing platforms; two pre-deformation correction mechanisms, each located on top of the two processing platforms; two automatic butt welding mechanisms, each located on the bottom of the two processing platforms; and a laser shearing and welding device located to the left of the pre-deformation correction mechanisms.

[0007] Preferably, the pre-deformation correction mechanism on the left includes a cylinder, a support frame is fixedly connected to the top of the processing platform, the cylinder is mounted on the top of the support frame, a correction plate is mounted on the output shaft of the cylinder, a pressure sensor is mounted on the bottom of the correction plate, a guide block is fixedly connected to the left side of the correction plate, and a guide groove is fixedly connected to the right side of the support frame. The guide groove is slidably connected to the guide block, and the two pre-deformation correction mechanisms are symmetrically distributed with the transverse central axis of the welding frame body as the center.

[0008] Preferably, the automatic docking mechanism on the left includes a lead screw and slide rail servo motor. A sliding groove is provided on the top of the welding frame body. The lead screw and slide rail servo motor is installed inside the sliding groove. The output shaft of the lead screw and slide rail servo motor is fixedly connected to a lead screw slider. The lead screw slider is slidably connected to the sliding groove. The top of the lead screw slider is fixedly connected to the processing platform. A displacement sensor is installed on one side of the processing platform. The two automatic docking mechanisms are symmetrically distributed with the transverse central axis of the welding frame body as the center.

[0009] Preferably, the laser shearing and welding device includes a welding traveling beam, which is installed on the top of the support frame. A sliding platform is slidably installed on the bottom of the welding traveling beam. A transverse moving motor is installed on the bottom of the sliding platform. A connecting piece is fixedly connected to the output shaft of the transverse moving motor. A lifting servo motor is installed on the bottom of the connecting piece. A laser cutting and welding head is fixedly connected to the output shaft of the lifting servo motor.

[0010] Preferably, the correction plate is a multi-segment design, and the right side of the correction plate has a protruding end, which protrudes 5mm beyond the processing platform to achieve docking.

[0011] Preferably, the welding frame body is provided with symmetrical feeding channels on the left and right sides, namely the left feeding channel and the right feeding channel, which can be used to transport the thin plate body in the left and right direction.

[0012] Preferably, a PNC central control module is installed on the welding frame body, and a status detection light is installed on the front side of the PNC central control module.

[0013] In summary, this application includes at least one of the following beneficial technical effects: 1. Equipped with pre-deformation correction function before welding, completely solving the problem of thin plate welding deformation: The present invention is equipped with a symmetrically distributed double pre-deformation correction mechanism. The multi-segment correction plate is driven down by a cylinder, and the correction pressure is monitored in real time by a bottom pressure sensor. It can accurately level and correct the thin plate on the processing platform, effectively eliminating defects such as warping, bending, and elastic deformation of the thin plate, and avoiding uneven joint gaps and welding misalignment caused by plate deformation, thus improving the welding accuracy of thin plates from the source.

[0014] 2. Achieve fully automated and precise sheet metal docking with high consistency: Through a dual-set symmetrical automatic docking mechanism, a lead screw slide rail servo motor is used in conjunction with a lead screw slider to drive two sets of processing platforms to slide relative to each other. With the addition of displacement sensors to monitor displacement data in real time, the docking distance and docking accuracy of the two sets of thin plates are precisely controlled. This eliminates the drawbacks of traditional manual docking, such as large errors and low efficiency, and achieves automated, standardized, and precise docking, adapting to the needs of high-precision thin plate welding processing.

[0015] 3. Integrated shearing and welding, compact process connection, and high processing efficiency: The device integrates laser shearing and laser welding functions. Through the walking beam, the horizontal movement motor, and the lifting servo motor, the horizontal and vertical multi-dimensional displacement adjustment of the laser cutting and welding head can be realized. It can complete the entire process of precise shearing, butt jointing, and welding of thin plates in one go. The process integration is high, and there is no need for equipment transfer and secondary clamping, which greatly improves processing efficiency.

[0016] 4. The correction structure is reasonably designed and the docking assistance effect is excellent: The correction plate adopts a multi-segment structure to adapt to the deformation correction needs of different areas of the thin plate. A 5mm protruding end is set on the right side of the correction plate, which can accurately assist the plate in alignment and bonding, further reduce the docking gap, and ensure that the docking surface is flat and bonded, providing a good foundation for subsequent high-precision laser welding. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure in Embodiment 1 of this application; Figure 2 This is a schematic diagram of the integrated shearing and welding device in Embodiment 1 of this application; Figure 3 This is a schematic diagram of the structure in Embodiment 1 of this application; Reference numerals: 1. Welding frame body; 2. Machining platform; 3. Cylinder; 301. Support frame; 302. Correction plate; 303. Pressure sensor; 304. Guide groove; 305. Guide block; 4. Screw slide rail servo motor; 401. Screw slider; 5. Welding traveling beam; 501. Sliding platform; 502. Lateral movement motor; 503. Lifting servo motor; 506. Laser cutting welding head; 6. Protruding end; 7. Right feeding channel; 701. Left feeding channel; 9. PNC central control module; 901. Status detection light. Detailed Implementation

[0018] Example 1 The following is in conjunction with the appendix Figures 1-3 The first embodiment of this application will be described in further detail.

[0019] An automatic shearing and butt welding laser welding device for thin plates with pre-deformation correction function includes: a welding frame body 1 and two processing platforms 2, the two processing platforms 2 being symmetrically arranged above the welding frame body 1 for supporting the thin plates to be processed; two pre-deformation correction mechanisms are respectively installed on the top of the two processing platforms 2 for pre-deformation leveling and correction of the thin plates before welding; two automatic butt welding mechanisms are respectively set at the bottom of the two processing platforms 2 for driving the two sets of thin plates to automatically and accurately butt weld; and a laser shearing and welding device is arranged to the left of the pre-deformation correction mechanisms for completing the precise shearing and butt welding operations of the thin plates.

[0020] In this embodiment, the pre-deformation correction mechanism on the left includes a cylinder 3. A support frame 301 is fixedly connected to the top of the processing platform 2. The cylinder 3 is vertically fixedly installed at the top crossbeam of the support frame 301. A correction plate 302 is fixedly installed at the bottom end of the vertical output shaft of the cylinder 3. Pressure sensors 303 are evenly installed on the bottom surface of the correction plate 302, which can detect the downward pressure between the correction plate 302 and the surface of the thin plate in real time, so as to achieve constant pressure correction and avoid damage to the thin plate due to excessive pressure or incomplete correction due to insufficient pressure. A guide block 305 is fixedly connected to the left side of the correction plate 302, and a guide groove 304 is vertically fixedly connected to the right side of the support frame 301. The guide groove 304 and the guide block 305 slide vertically to precisely guide the lifting and lowering correction action of the correction plate 302, ensuring that the correction plate runs smoothly and the correction force is uniform. The two pre-deformation correction mechanisms are symmetrically distributed around the transverse central axis of the welding frame body 1, and can simultaneously perform synchronous correction operations on the thin plates on both processing platforms.

[0021] In this embodiment, the automatic docking mechanism on the left includes a lead screw and slide rail servo motor 4. A transverse sliding groove is provided on the top of the welding frame body 1. The lead screw and slide rail servo motor 4 is fixedly embedded inside the sliding groove. The telescopic output shaft of the lead screw and slide rail servo motor 4 is fixedly connected to a lead screw slider 401. The lead screw slider 401 is laterally slidably connected to the sliding groove, and the top of the lead screw slider 401 is fixedly connected to the bottom of the corresponding processing platform 2. A high-precision displacement sensor is installed on the side wall of the processing platform 2, which can collect the transverse displacement data of the processing platform in real time and accurately feed back the thin plate docking stroke. The two automatic docking mechanisms are symmetrically arranged and can drive the two processing platforms 2 to slide relative to or away from each other, realizing the automatic and precise docking and separation of two thin plates, with controllable docking displacement accuracy.

[0022] In this embodiment, the laser shearing and welding device includes a welding traveling beam 5, which is horizontally mounted on top of the two side support frames 301 to form a stable welding traveling reference. A sliding platform 501 is slidably installed at the bottom of the welding traveling beam 5, allowing it to slide laterally along the beam. A horizontal moving motor 502 is fixedly installed at the bottom of the sliding platform 501, and an assembly connector is fixedly connected to the output shaft of the horizontal moving motor 502. A lifting servo motor 503 is fixedly installed at the bottom end of the connector, and a laser cutting welding head 506 is fixedly installed at the lower end of the vertical output shaft of the lifting servo motor 503. Through the coordinated operation of the horizontal moving motor 502 and the lifting servo motor 503, the laser cutting welding head 506 can be precisely adjusted horizontally and vertically in multiple dimensions to complete the precise shearing of the thin plate end and continuous laser welding of the butt weld.

[0023] In this embodiment, the straightening plate 302 adopts a multi-segment integrated structure design, which can adapt to the deformation differences of different areas of the thin plate and ensure the flatness and uniformity of the large area thin plate. The right side of the straightening plate 302 is integrally formed with a protruding end 6. The length of the protruding end 6 protruding from the processing platform 2 is set to 5mm. This structure can provide precise positioning assistance when the plates are joined, so that the joining end faces of the two thin plates are tightly fitted, further improving the joining accuracy.

[0024] In this embodiment, symmetrical feeding channels are opened on the left and right sides of the welding frame body 1, namely the left feeding channel 701 and the right feeding channel 7. The two sets of feeding channels are arranged horizontally opposite each other, which can realize the automatic left and right conveying of thin plates on both sides, complete the automatic feeding of plates, and improve the automation level of the equipment without manual placement.

[0025] In this embodiment, a PNC central control module 9 is fixedly installed on the front of the welding frame body 1. As the core control unit of the equipment, it uniformly manages the operation of the entire process of correction, docking, shearing and welding. A status detection light 901 is embedded in the front of the PNC central control module 9, which can intuitively display the working status of the equipment such as standby, operation, fault, and completion through different light colors, so that the operator can keep abreast of the equipment's operating status in real time.

[0026] The implementation principle of the automatic shearing and butt welding laser welding device for thin plates with pre-deformation correction function in this application embodiment is as follows: When the equipment is working, the thin plates to be processed are automatically fed to the surfaces of the processing platforms 2 on both sides through the left feeding channel 701 and the right feeding channel 7, respectively, to complete the automatic feeding. Then, the PNC central control module 9 controls the pre-deformation correction mechanism on both sides to start synchronously. The cylinder 3 drives the correction plate 302 to move vertically downward, and the guide block 305 slides smoothly along the guide groove 304 to ensure that the correction plate is pressed vertically. The pressure sensor 303 monitors the pressing pressure in real time and matches the preset correction pressure according to the material and thickness of the thin plate to level and correct the warping and bending deformation of the thin plate surface and eliminate the deformation defects of the plate. Then, the laser shearing and welding device is started. The horizontal movement motor 502 drives the sliding platform 501 to move horizontally along the welding walking beam 5, and the lifting servo motor 503 adjusts the vertical height of the laser cutting welding head 506. The thin plate is cut on both sides. After the cutting is completed, the automatic docking mechanism is started. The servo motors 4 on both sides drive the lead screw sliders 401 to slide relative to each other along the sliding groove of the frame, which drives the two sets of processing platforms 2 to move towards each other. The displacement sensor monitors the docking displacement in real time and accurately controls the docking stroke. With the limiting assistance of the 5mm protruding end 6 on the right side of the straightening plate 302, the end faces of the thin plates on both sides are accurately fitted and docked, ensuring that the docking gap is uniform and there are no misaligned edges. After the plate docking and positioning is completed, the laser shearing and welding device is started again to complete the continuous laser welding operation along the docking gap, realizing the integrated processing of thin plate straightening, docking, shearing and welding in one go. The entire equipment operation is centrally controlled by the PNC central control module 9, and the status detection light 901 provides real-time feedback on the equipment's operating status, enabling fully automated operation and significantly improving processing accuracy and efficiency.

[0027] Example 2 The difference between this embodiment and Embodiment 1 is that an air-blowing cooling component is added to the laser welding head of the laser cutting welding head 506. The air-blowing cooling component uses inert gas to cool the weld during the welding process, reduce the heat-affected zone, avoid deformation after welding of thin plates, and prevent weld oxidation, thereby further improving the welding quality.

[0028] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic shearing and butt welding laser welding device for thin plates with pre-deformation correction function, comprising: The welding machine frame body (1) and two processing platforms (2) are characterized by: Two pre-deformation correction mechanisms are provided, and the two pre-deformation correction mechanisms are respectively located on the top of the two processing platforms (2); Two automatic docking mechanisms are provided, and the two automatic docking mechanisms are respectively located at the bottom of the two processing platforms (2); The laser shearing and welding device is located on the left side of the pre-deformation correction mechanism.

2. The automatic shearing and butt welding laser welding device for thin plates with pre-deformation correction function according to claim 1, characterized in that: The pre-deformation correction mechanism on the left includes a cylinder (3). A support frame (301) is fixedly connected to the top of the processing platform (2). The cylinder (3) is installed on the top of the support frame (301). A correction plate (302) is installed on the output shaft of the cylinder (3). A pressure sensor (303) is installed at the bottom of the correction plate (302). A guide block (305) is fixedly connected to the left side of the correction plate (302). A guide groove (304) is fixedly connected to the right side of the support frame (301). The guide groove (304) is slidably connected to the guide block (305). The two pre-deformation correction mechanisms are symmetrically distributed with the transverse central axis of the welding frame body (1) as the center.

3. The automatic shearing and butt welding laser welding device for thin plates with pre-deformation correction function according to claim 2, characterized in that: The automatic docking mechanism on the left includes a lead screw and slide rail servo motor (4). The top of the welding frame body (1) is provided with a sliding groove. The lead screw and slide rail servo motor (4) is installed inside the sliding groove. The output shaft of the lead screw and slide rail servo motor (4) is fixedly connected to a lead screw slider (401). The lead screw slider (401) is slidably connected to the sliding groove. The top of the lead screw slider (401) is fixedly connected to the processing platform (2). Displacement sensors are installed on one side of the processing platform (2). The two automatic docking mechanisms are symmetrically distributed with the transverse central axis of the welding frame body (1) as the center.

4. The automatic shearing and butt welding laser welding device for thin plates with pre-deformation correction function according to claim 3, characterized in that: The laser shearing and welding device includes a welding walking beam (5), which is installed on the top of the support frame (301). A sliding platform (501) is slidably installed on the bottom of the welding walking beam (5). A horizontal moving motor (502) is installed on the bottom of the sliding platform (501). A connector is fixedly connected to the output shaft of the horizontal moving motor (502). A lifting servo motor (503) is installed on the bottom of the connector. A laser cutting and welding head (506) is fixedly connected to the output shaft of the lifting servo motor (503).

5. The automatic shearing and butt welding laser welding device for thin plates with pre-deformation correction function according to claim 4, characterized in that: The correction plate (302) is a multi-segment design, and the right side of the correction plate (302) is provided with a protruding end (6), and the protruding end (6) protrudes 5mm from the processing platform (2) to realize docking work.

6. The automatic shearing and butt welding laser welding device for thin plates with pre-deformation correction function according to claim 5, characterized in that: The welding frame body (1) is provided with symmetrical feeding channels on the left and right sides, namely the left feeding channel (701) and the right feeding channel (7). Both the left feeding channel (701) and the right feeding channel (7) can be used to transport the thin plate body in the left and right directions.

7. The automatic shearing and butt welding laser welding device for thin plates with pre-deformation correction function according to claim 6, characterized in that: The welding frame body (1) is equipped with a PNC central control module (9), and a status detection light (901) is installed on the front side of the PNC central control module (9).

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