Welding tool for multi-sensor flexible platform

Abstract

The invention discloses a welding tool for a multi-sensor flexible platform, and relates to welding tools, the welding tool for the multi-sensor flexible platform comprises a flexible platform, boundary beam supports are arranged on the left side and the right side of the flexible platform, rodless air cylinders are arranged on the boundary beam supports, magnetic coupling moving blocks are movably arranged on the rodless air cylinders, and the magnetic coupling moving blocks are arranged on the flexible platform. A welding base is fixedly arranged on the magnetic coupling moving block, a welding assembly is arranged at the top of the welding base, first positioning assemblies are arranged on the front side of the flexible platform in a bilateral symmetry mode, second positioning assemblies are arranged on the front side and the rear side of the middle of the flexible platform, and third positioning assemblies are arranged on the rear side of the flexible platform in a bilateral symmetry mode. A first guide rail is arranged between the third positioning assembly and the first positioning assembly, a motor is arranged on the right side of the first guide rail, a rotating shaft of the motor is connected with a lead screw, a movable seat is movably arranged on the lead screw, and a first infrared sensor and a displacement sensor are fixedly arranged on the left and right sides of the movable seat respectively. Welding seams are detected through multiple sensors, the welding quality is improved, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of welding fixture technology, and in particular to a welding fixture for a multi-sensor flexible platform. Background Technology

[0002] In modern manufacturing, welding is a crucial means of connecting components and is widely used in various fields such as automobile manufacturing, machining, and aerospace. Welding fixtures are the core equipment for ensuring welding accuracy and efficiency. As industrial production continues to demand higher quality welding results for components, the performance of welding fixtures is also facing increasingly stringent requirements.

[0003] Currently, most welding fixtures on the market still rely heavily on manual welding operations. In this mode, the quality of the welding work depends entirely on the experience level of the worker. Experienced operators can rely on touch and visual judgment to ensure the flatness and fusion of the weld as much as possible. However, it is still difficult to achieve a high degree of consistency in delicate operations such as weld trajectory tracking and welding temperature control for complex workpieces. On the other hand, inexperienced operators are prone to problems such as incomplete welding, missing welding, uneven weld width, and excessively high or low molten pool temperature, which leads to an increase in the scrap rate of workpieces and seriously affects the overall quality of products.

[0004] Meanwhile, during manual welding, operators need to be in a high-temperature, high-light working environment for a long time, which not only involves high labor intensity but also poses certain safety hazards.

[0005] Furthermore, after manual welding is completed, the quality of the weld is mostly inspected by sampling after the fact, which cannot detect defects in the welding process in real time. Once a batch of welding quality problems occur, it will cause huge waste of production costs and make it difficult to meet the requirements of modern industrial mass production for welding quality stability, consistency and production efficiency. Summary of the Invention

[0006] This invention provides a welding fixture for a multi-sensor flexible platform.

[0007] A welding fixture for a multi-sensor flexible platform includes: a flexible platform, side beam supports on the left and right sides of the flexible platform, rodless cylinders on the side beam supports, magnetic coupling moving blocks movably mounted on the rodless cylinders, welding seats fixedly mounted on the magnetic coupling moving blocks, welding components on the top of the welding seats, positioning components one symmetrically mounted on the front left and right sides of the flexible platform, positioning components two mounted on the front and rear sides of the middle of the flexible platform, positioning components three symmetrically mounted on the rear left and right sides of the flexible platform, a guide rail one between positioning components three and positioning components one, a motor mounted on the right side of the guide rail one, the motor shaft connected to a lead screw, a movable seat movably mounted on the lead screw, and an infrared sensor one and a displacement sensor fixedly mounted on the left and right sides of the movable seat, respectively. The welding assembly is used to perform laser welding between workpiece 1 and workpiece 2, while monitoring the temperature of the weld front side of workpiece 1. Positioning assembly 1 and positioning assembly 3 are used to fix workpiece 1 on the flexible platform, and positioning assembly 2 is used to fix workpiece 2 on the flexible platform. The magnetically coupled moving block is used to support the welding seat and welding assembly to move back and forth on the rodless cylinder. The motor is used to control the rotation of the lead screw to drive the moving seat to move back and forth on the lead screw. Infrared sensor 1 is used to detect the temperature of the back side of the weld, and displacement sensor is used to monitor the width of the molten pool on the back side of the weld in real time.

[0008] Preferably, the welding assembly includes: a main unit, a rotating shaft 1 is provided on the top left side of the main unit, a servo motor is provided inside the main unit, the rotating shaft of the servo motor is connected and fixed to the rotating shaft 1, a connecting plate is movably provided on the rotating shaft 1, a servo motor 2 is provided on the connecting plate, the rotating shaft of the servo motor 2 is movably connected to the connecting plate, a camera is provided on the servo motor 2, a hydraulic cylinder is fixedly provided on the other side of the connecting plate, a laser generator is provided on the top of the telescopic rod of the hydraulic cylinder, a wire-spinning machine is fixedly provided on the side of the laser generator, a focusing lens mount is provided at the bottom of the laser generator, and a welding head is provided below the focusing lens mount; The wire feeder is used to transport the welding wire to the welding area, and the laser generator is used to emit a laser that is focused onto the welding head through a focusing lens mount, thereby melting the welding wire and the workpiece to form a molten pool. The camera is used to identify the location of the weld, track the weld trajectory, and correct the position of the weld head in real time through the feedback system to compensate for deviations caused by thermal deformation, etc.

[0009] The servo motor is used to control the rotation of the connecting plate, the second servo motor is used to adjust the angle of the camera, the hydraulic cylinder is used to control the up and down movement of the laser generator, focusing lens mount, wire feeder and welding head, and the host is responsible for receiving and processing signals and controlling the operation of the connecting plate, servo motor, second servo motor, camera, laser generator and wire feeder.

[0010] Preferably, the positioning component one includes: a support base one, a pin is provided on the top of the support base one, the pin is inserted into the rear end hole of the workpiece one, a pin seat is fixedly provided on the support base one, the pin of the pin seat is inserted into the side end hole of the rear side of the workpiece one, a support base two and a support base three are respectively provided on the left and right sides of the rear side of the workpiece one, a positioning rod is movably provided on the support base two, and a bolt handle one is provided on the support base three. The bolt handle one is used to rotate the handle to rotate the bolt to fix the side of the workpiece one.

[0011] Preferably, the positioning component two includes: a support base four, a bearing seat is provided on the top of the support base four away from the workpiece two, a rotating shaft is provided on the bearing seat, a connecting rod is fixedly provided on the rotating shaft, and a bolt handle two is provided on the other end of the connecting rod. The bolt handle two is used to rotate the handle to press the bolt against the top of the workpiece two for fixation, and the bearing seat is used to rotate the connecting rod around the rotating shaft to adjust the pressing angle of the bolt handle two.

[0012] Preferably, the positioning component three includes: a support base five, a rotating shaft seat fixedly mounted on the top of the support base five, a connecting rod movably mounted on the rotating shaft of the rotating shaft seat, a hollow cam mounted on the other end of the connecting rod, and the hollow cam engaging with the front end of the workpiece one and being fixed by a pin.

[0013] Preferably, multiple sets of pin through holes are equidistantly arranged on the flexible platform, and each support base has a through hole of the same size as the pin through hole at its four bottom corners. The pin through holes on the flexible platform are inserted into the bottom of the support base to fix it.

[0014] Compared with the prior art, the beneficial effects of the present invention are: The camera within the welding assembly accurately identifies the weld position, tracks the weld trajectory in real time, and transmits position deviation signals to the host computer via a feedback system. Upon receiving the signal, the host computer controls a servo motor to adjust the rotation angle of the connecting plate and another servo motor to adjust the camera angle. Simultaneously, it drives a hydraulic cylinder to move the welding head up and down, promptly correcting the welding head's posture and effectively compensating for welding deviations caused by workpiece thermal deformation, tooling vibration, and other factors. This ensures the welding head remains precisely aligned with the weld trajectory. The entire welding process requires no manual intervention, eliminating reliance on operator experience and avoiding the inconsistent weld quality caused by operational differences in manual welding. This significantly improves the consistency and accuracy of welding operations.

[0015] The infrared sensor in the device works in conjunction with the displacement sensor to monitor the weld quality in real time during the welding process. The infrared sensor continuously detects the temperature on the back side of the weld, using the temperature data to determine the melting state of the molten pool and prevent defects such as burn-through due to excessively high temperatures or poor fusion due to excessively low temperatures. The displacement sensor monitors the width of the molten pool on the back side of the weld in real time, accurately capturing changes in the size of the molten pool to ensure that the weld width meets design standards and guarantees weld strength. Simultaneously, the camera, while tracking the weld trajectory, can also assist in observing the surface condition of the weld, promptly detecting surface cracks, porosity, and other problems.

[0016] Compared with traditional manual sampling inspection, the above-mentioned multi-sensor collaborative real-time flaw detection method can detect welding defects in the first instance, making it easier for staff to adjust welding parameters in a timely manner, avoiding batch welding quality risks from the source, reducing workpiece scrap rate, and reducing production cost waste. Attached Figure Description

[0017] Figure 1 A three-dimensional structural schematic diagram of a welding fixture block diagram of a multi-sensor flexible platform according to an embodiment of the present disclosure is shown. Figure 2 This diagram shows a top view of the welding fixture of a multi-sensor flexible platform according to an embodiment of the present disclosure. Figure 3 This diagram shows a partial three-dimensional structural schematic of a welding assembly in a welding fixture of a multi-sensor flexible platform according to an embodiment of the present disclosure. Figure 4 This diagram shows a partial three-dimensional structural schematic of a welding assembly in a welding fixture of a multi-sensor flexible platform according to an embodiment of the present disclosure. Figure 5 This diagram shows a three-dimensional structural schematic of workpiece 1 and workpiece 2 in a welding fixture of a multi-sensor flexible platform according to an embodiment of the present disclosure. Figure 6 This diagram shows a three-dimensional structural schematic of a positioning component in a welding fixture of a multi-sensor flexible platform according to an embodiment of the present disclosure. Figure 7 This diagram shows a side-view perspective view of a positioning component in a welding fixture of a multi-sensor flexible platform according to an embodiment of the present disclosure. Figure 8 This diagram shows a three-dimensional structural schematic of the positioning component two in the welding fixture of a multi-sensor flexible platform according to an embodiment of the present disclosure. Figure 9 This diagram shows a three-dimensional structural schematic of the positioning component three in the welding fixture of a multi-sensor flexible platform according to an embodiment of the present disclosure. Figure 10 This diagram illustrates a three-dimensional structure of the flexible platform in a welding fixture for a multi-sensor flexible platform according to an embodiment of the present disclosure. Figure 11 This diagram shows a three-dimensional structural schematic of a guide rail in a welding fixture of a multi-sensor flexible platform according to an embodiment of the present disclosure. Figure 12 This diagram illustrates a three-dimensional structure of the movable seat in the welding fixture of a multi-sensor flexible platform according to an embodiment of the present disclosure.

[0018] The components include: 1. Flexible platform; 101. Side beam support; 102. Rodless cylinder; 103. Welding seat; 2. Welding assembly; 201. Main unit; 202. Rotating shaft one; 203. Servo motor two; 204. Camera; 205. Connecting plate; 206. Hydraulic cylinder; 207. Laser generator; 208. Welding head; 209. Wire feeding machine; 301. Positioning assembly three; 3011. Support seat five; 3012. Rotating shaft seat; 3013. Hollow cam; 302. Positioning... Component 2; 3021, Support Base 4; 3022, Bearing Housing; 3023, Bolt Handle 2; 303, Positioning Component 1; 3031, Support Base 1; 3032, Support Base 2; 3033, Pin Seat; 3034, Positioning Rod; 3035, Support Base 3; 3036, Bolt Handle 1; 401, Workpiece 1; 402, Workpiece 2; 5, Guide Rail 1; 501, Moving Seat; 5011, Displacement Sensor; 5012, Infrared Sensor 1; 502, Motor. Detailed Implementation

[0019] Various exemplary embodiments, features, and aspects of this disclosure will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0020] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0021] Furthermore, to better illustrate this disclosure, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand that this disclosure can be practiced without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this disclosure.

[0022] Reference Figures 1-12 As shown, this embodiment of a welding fixture for a multi-sensor flexible platform includes a flexible platform 1. The left and right sides of the flexible platform 1 are fixedly connected to a side beam support 101. This fixed connection provides a stable mounting base for the rodless cylinder 102, preventing the support from loosening and affecting accuracy during welding. The top of the side beam support 101 is fixedly installed to the rodless cylinder 102. A magnetic coupling moving block is movably mounted on the rodless cylinder 102. This movable connection allows the magnetic coupling moving block to move smoothly along the length of the rodless cylinder 102, providing power support for adjusting the position of the welding components.

[0023] The top of the magnetically coupled moving block is fixedly connected to the welding seat 103. The welding assembly 2 is installed on the top of the welding seat 103. The main unit 201 of the welding assembly 2 is tightly fixed to the welding seat 103. The main unit 201 is responsible for receiving and processing the signals fed back by each component and is the control core of the tooling. Positioning assembly 1 303 is symmetrically arranged on the left and right sides of the front side of the flexible platform 1, positioning assembly 2 302 is arranged on both the front and rear sides of the middle, and positioning assembly 3 301 is symmetrically arranged on the left and right sides of the rear side. Positioning assembly 1 303 and positioning assembly 301 work together to achieve bidirectional fixation of workpiece 1 401. Positioning assembly 2 302 fixes workpiece 2 402 alone. The three work together to ensure that the workpiece does not shift during welding.

[0024] Positioning component 301 and positioning component 303 are fixedly connected to guide rail 5. The right side of guide rail 5 is fixedly installed with motor 502. The rotating shaft of motor 502 is coaxially connected to lead screw. This coaxial connection ensures that motor 502 can accurately drive lead screw rotation. A movable seat 501 is movably set on lead screw. Lead screw transmission can realize uniform and precise forward and backward movement of movable seat 501. Infrared sensor 5012 and displacement sensor 5011 are fixedly set on the left and right sides of movable seat 501, respectively. Infrared sensor 5012 is used to detect the temperature on the back of the weld, and displacement sensor 5011 is used to monitor the width of the molten pool on the back of the weld in real time. The two work together to realize real-time monitoring of welding quality.

[0025] In welding assembly 2, a rotating shaft 202 is provided on the top left side of the main unit 201. The servo motor shaft inside the main unit 201 is connected and fixed to the rotating shaft 202. The servo motor can drive the rotating shaft 202 to rotate the connecting plate 205. A wire feeder 209 and a hydraulic cylinder 206 are provided on the connecting plate 205. The top of the telescopic rod of the hydraulic cylinder 206 is fixed to the laser generator 207. A welding head 208 is installed below the focusing lens mount at the bottom of the laser generator 207. The wire feeder 209 feeds the welding wire to the welding area. The laser emitted by the laser generator 207 is focused by the focusing lens mount and then applied to the workpiece by the welding head 208 to achieve laser welding. At the same time, welding assembly 2 can also monitor the front temperature of the weld seam of workpiece 401.

[0026] In some examples, positioning component 303 includes support base 3031, with a pin at its top that can be inserted into a rear end hole of workpiece 401. A pin holder 3033 is fixed to support base 3031, with the pin of the pin holder 3033 inserted into a side end hole on the rear side of workpiece 401. Support bases 3032 and 3035 are respectively located on the left and right rear sides of workpiece 401. A positioning rod 3034 is movably mounted on support base 3032, and a bolt handle 3036 is mounted on support base 3035. By rotating the handle, the bolt can be rotated to press and fix workpiece 401 from the side, forming a multi-point fixation with the pin and positioning rod 3034, further improving the stability of workpiece 401.

[0027] In some examples, positioning component 2 302 includes support base 4 3021. A bearing seat 3022 is fixed to the top of support base 4 3021 on the side away from workpiece 2 402. A rotating shaft is provided inside the bearing seat 3022, and a connecting rod is fixedly connected to the rotating shaft. A bolt handle 2 3023 is installed at the other end of the connecting rod. The bearing seat 3022 allows the connecting rod to rotate freely around the rotating shaft, facilitating the adjustment of the pressing angle of bolt handle 2 3023. Rotating bolt handle 2 3023 allows the bolt to press tightly against the top of workpiece 2 402, adapting to the fixing requirements of workpiece 2 402 with different thicknesses and sizes.

[0028] In some examples, positioning component 301 includes support base 3011, with a rotating shaft seat 3012 fixed to the top of support base 3011. A connecting rod is movably connected to the rotating shaft of rotating shaft seat 3012, and a hollow cam 3013 is provided at the other end of the connecting rod. The hollow cam 3013 is adapted to the contour of one front end of workpiece 401. By inserting a pin into the mating hole between the hollow cam 3013 and workpiece 401, workpiece 401 can be quickly fixed, and the pin can be quickly removed to disassemble the workpiece after welding, improving work efficiency.

[0029] In some examples, the flexible platform 1 has multiple sets of pin through holes equidistantly arranged, and the four corners of the bottom of the support base of each positioning component have through holes of the same size as the pin through holes. By passing the pins through the pin through holes of the flexible platform 1 and the through holes at the bottom of the support base, the support base can be quickly fixed. At the same time, the position of the support base can be adjusted according to the size of workpiece 1 401 and workpiece 2 402, so that the tooling can be adapted to the welding of workpieces of various specifications.

[0030] In some examples, a servo motor 203 is mounted on the connecting plate 205 of the welding assembly 2. The shaft of the servo motor 203 is movably connected to the connecting plate 205, and a camera 204 is fixed to the output end of the servo motor 203. The servo motor 203 can drive the camera 204 to rotate around the shaft to adjust the angle, ensuring that the camera 204 can clearly identify the weld position and track the weld trajectory. The deviation signal is transmitted to the host 201 through the feedback system to correct the posture of the welding head 208 in real time and compensate for deviations caused by thermal deformation, vibration, etc.

[0031] In some examples, both the infrared sensor 5012 and the displacement sensor 5011 have high-temperature resistant quartz covers on their external detection ends, with an anti-fogging coating on the surface of the quartz covers. The high-temperature resistant quartz covers can isolate the high-temperature sparks during the welding process, protecting the sensor detection ends from damage; the anti-fogging coating can prevent welding fumes from condensing into fog on the surface of the quartz covers, ensuring that the sensors can accurately collect data on the temperature of the back of the weld and the width of the molten pool.

[0032] Working principle of the invention: When using this multi-sensor flexible platform welding fixture, the initial debugging and workpiece positioning of the fixture must be completed according to the specifications and dimensions of workpiece 1 (401) and workpiece 2 (402). First, using the multiple sets of pin holes equidistantly arranged on the flexible platform 1, the support seats of positioning component 1 (303), positioning component 2 (302), and positioning component 3 (301) are inserted into the matching through holes via pins to fix the positions of the support seats, ensuring that each positioning component precisely corresponds to the part of the workpiece to be fixed.

[0033] Next, the workpiece is fixed: For workpiece 401, it is first placed on the flexible platform 1, so that the pin on the top of the support seat 3031 in the positioning component 303 is inserted into the rear end hole of workpiece 401, and the pin of the pin seat 3033 is inserted into the rear side end hole of workpiece 401. Then, the positioning rod 3034 on the support seat 2 3032 is adjusted to fit against the side of workpiece 401. The bolt handle 3036 on the support seat 3 3035 is rotated, and the side of workpiece 401 is pressed by the bolt to achieve lateral fixation. At the same time, the connecting rod on the top rotating shaft seat 3012 of the support seat 5 3011 in the positioning component 3 301 is rotated so that the hollow cam 3013 fits against the front end of workpiece 401, and the pin is inserted to complete the front and rear bidirectional fixation of workpiece 401. For workpiece 402, place it in the middle of the flexible platform 1, rotate the connecting rod around the bearing seat 3022 at the top of the support seat 3021 in the positioning assembly 302, adjust the pressing angle of the bolt handle 3023 so that it is aligned with the top of workpiece 402, rotate the bolt handle 3023, and fix the workpiece 402 by pressing the bolt on the top of the workpiece 402 to ensure that the welding parts of the two workpieces are aligned.

[0034] After the workpiece is fixed, the welding assembly 2 and the monitoring assembly are debugged: the host 201 of the welding assembly 2 is started, and the host 201 controls the servo motor 203 to adjust the angle of the camera 204 so that the lens of the camera 204 is aligned with the weld seam area of ​​the two workpieces to complete the weld seam recognition calibration; at the same time, the extension rod of the hydraulic cylinder 206 is controlled to extend and retract, and the height of the laser generator 207, the focusing lens mount and the welding head 208 are adjusted so that the welding head 208 and the weld seam are kept at an appropriate distance; the motor 502 on the right side of the guide rail 5 is started, and the motor 502 drives the lead screw to rotate, so that the movable seat 501 on the lead screw moves along the guide rail 5, and the infrared sensor 5012 and the displacement sensor 5011 on the movable seat 501 are adjusted to the monitoring starting position on the back of the weld seam, and the detection accuracy of the sensors is calibrated to ensure accurate data acquisition.

[0035] After the welding operation is started, the host 201 synchronously controls the various components to work together: on the one hand, the host 201 controls the laser generator 207 to emit a laser. After the laser is focused by the focusing lens, it acts on the weld area through the welding head 208. At the same time, the host 201 controls the wire feeder 209 to feed the welding wire to the welding area. The welding wire and the part of the workpiece to be welded melt under the high temperature of the laser to form a molten pool. On the other hand, the host 201 drives the rodless cylinder 102 on the side beam support 101 to work. The magnetic coupling moving block on the rodless cylinder 102 drives the welding seat 103 and the welding assembly 2 to move at a constant speed along the length of the rodless cylinder 102, so that the welding head 208 can continuously weld along the weld trajectory. At the same time, the motor 502 drives the moving seat 501 to move synchronously to ensure that the infrared sensor 5012 and the displacement sensor 5011 are always aligned with the back of the weld.

[0036] During the welding process, multiple sensors monitor and provide feedback adjustments in real time: Camera 204 continuously identifies the weld position and tracks the weld trajectory. If the welding head 208 deviates from the weld due to workpiece thermal deformation or slight vibration of the tooling, Camera 204 transmits the deviation signal to the host 201 through the feedback system. The host 201 immediately controls the servo motor to drive the rotating shaft 202 to rotate the connecting plate 205, while simultaneously adjusting the extension and retraction of the hydraulic cylinder 206 to correct the position and orientation of the welding head 208, ensuring that the welding head 208 is always precisely aligned with the weld; Infrared sensor 5012 continuously detects the temperature on the back of the weld and transmits the temperature data to the host in real time. The host 201 judges the melting state of the molten pool by temperature data. If the temperature is too high, it may cause the weld to burn through, or if it is too low, it may cause poor fusion. In this case, the power of the laser generator 207 is adjusted. The displacement sensor 5011 monitors the width of the molten pool on the back of the weld in real time, and the data is synchronously fed back to the host 201. If the width of the molten pool exceeds or falls below the design standard, the host 201 adjusts the wire feeding speed of the wire feeder 209 or the moving speed of the welding component 2 to ensure that the width of the weld meets the requirements. At the same time, the camera 204 can help observe the surface condition of the weld, detect surface cracks, pores and other defects in time, and issue a warning signal through the host 201.

[0037] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A welding fixture for a multi-sensor flexible platform, characterized in that, include: A flexible platform (1) is provided with side beam supports (101) on the left and right sides. A rodless cylinder (102) is provided on the side beam supports (101). A magnetic coupling moving block is movably provided on the rodless cylinder (102). A welding seat (103) is fixedly provided on the magnetic coupling moving block. A welding assembly (2) is provided on the top of the welding seat (103). A positioning assembly (303) is symmetrically provided on the left and right sides of the front side of the flexible platform (1). A positioning assembly is provided on both the front and rear sides of the middle part of the flexible platform (1). Component 2 (302) and the flexible platform (1) are symmetrically arranged with positioning component 3 (301) on the left and right sides. Positioning component 3 (301) and positioning component 1 (303) are arranged with guide rail 1 (5). A motor (502) is arranged on the right side of guide rail 1 (5). The rotating shaft of the motor (502) is connected to the lead screw. A movable seat (501) is movably arranged on the lead screw. An infrared sensor 1 (5012) and a displacement sensor (5011) are fixedly arranged on the left and right sides of the movable seat (501). The welding assembly (2) is used to perform laser welding between workpiece 1 (401) and workpiece 2 (402) and monitor the front temperature of the weld seam of workpiece 1 (401). Positioning assembly 1 (303) and positioning assembly 3 (301) are used to fix workpiece 1 (401) on the flexible platform (1). Positioning assembly 2 (302) is used to fix workpiece 2 (402) on the flexible platform (1). The magnetic coupling moving block is used to support the welding seat (103) and the welding assembly (2) to move back and forth on the rodless cylinder (102). The motor (502) is used to control the rotation of the lead screw to drive the moving seat (501) to move back and forth on the lead screw. Infrared sensor 1 (5012) is used to detect the back temperature of the weld seam. Displacement sensor (5011) is used to monitor the width of the molten pool on the back of the weld seam in real time.

2. The welding fixture for a multi-sensor flexible platform according to claim 1, characterized in that, The welding assembly (2) includes: a host (201), a rotating shaft (202) is provided on the top left side of the host (201), a servo motor is provided inside the host (201), the rotating shaft of the servo motor is connected and fixed to the rotating shaft (202), a connecting plate (205) is movably provided on the rotating shaft (202), a servo motor (203) is provided on the connecting plate (205), the rotating shaft of the servo motor (203) is movably connected to the connecting plate (205), a camera (204) is provided on the servo motor (203), a hydraulic cylinder (206) is fixedly provided on the other side of the connecting plate (205), a laser generator (207) is provided on the top of the telescopic rod of the hydraulic cylinder (206), a wire spinning machine (209) is fixedly provided on the side of the laser generator (207), a focusing lens mount is provided at the bottom of the laser generator (207), and a welding head (208) is provided below the focusing lens mount. The wire feeder (209) is used to feed the welding wire to the welding area, and the laser generator (207) is used to emit laser light and focus it onto the welding head (208) through the focusing lens mount, thereby melting the welding wire and the workpiece to form a molten pool; The camera (204) is used to identify the weld position, track the weld trajectory, and correct the position of the weld head (208) in real time through the feedback system to compensate for deviations caused by thermal deformation, etc. The servo motor is used to control the rotation of the connecting plate (205), the second servo motor (203) is used to adjust the angle of the camera (204), the hydraulic cylinder (206) is used to control the up and down movement of the laser generator (207), the focusing lens mount, the wire spinning machine (209) and the welding head (208), and the host (201) is responsible for receiving and processing signals and controlling the operation of the connecting plate (205), the servo motor, the second servo motor (203), the camera (204), the laser generator (207) and the wire spinning machine (209).

3. The welding fixture for a multi-sensor flexible platform according to claim 1, characterized in that, Positioning component one (303) includes: support base one (3031), the top of support base one (3031) is provided with a pin, the pin is inserted into the rear end hole of workpiece one (401), a pin seat (3033) is fixedly provided on support base one (3031), the pin of the pin seat (3033) is inserted into the side end hole of the rear side of workpiece one (401), support base two (3032) and support base three (3035) are respectively provided on the left and right sides of the rear side of workpiece one (401), a positioning rod (3034) is movably provided on support base two (3032), and a bolt handle one (3036) is provided on support base three (3035). The bolt handle one (3036) is used to rotate the handle to rotate the bolt to fix the side of workpiece one (401).

4. The welding fixture for a multi-sensor flexible platform according to claim 1, characterized in that, Positioning component two (302) includes: support base four (3021), a bearing seat (3022) is provided on the top side of support base four (3021) away from workpiece two (402), a rotating shaft is provided on bearing seat (3022), a connecting rod is fixedly provided on the rotating shaft, and a bolt handle two (3023) is provided on the other end of the connecting rod. Bolt handle two (3023) is used to rotate the handle to press the bolt against the top of workpiece two (402) for fixing, and the bearing seat (3022) is used to rotate the connecting rod around the rotating shaft to adjust the pressing angle of bolt handle two (3023).

5. The welding fixture for a multi-sensor flexible platform according to claim 1, characterized in that, Positioning component three (301) includes: support base five (3011), a rotating shaft seat (3012) is fixedly installed on the top of the support base five (3011), a connecting rod is movably installed on the rotating shaft of the rotating shaft seat (3012), and a hollow cam (3013) is installed at the other end of the connecting rod. The hollow cam (3013) is engaged with the front end of workpiece one (401) and fixed by being inserted and fixed by a pin.

6. The welding fixture for a multi-sensor flexible platform according to claim 1, characterized in that, Multiple sets of pin holes are equidistantly arranged on the flexible platform (1). Each support base has a through hole of the same size as the pin hole at its four corners. The pin holes on the flexible platform (1) are inserted into the bottom of the support base to fix it.

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