A lightning protection metal mesh riveting device for carbon fiber blades

Abstract

The present application relates to wind turbine manufacturing technical field, especially to a lightning protection metal mesh riveting device for carbon fiber blade, which comprises an embedded workbench, a riveting execution unit and a control unit; the embedded workbench is provided with a positioning concave die and a sinking block with a preloading station; the riveting execution unit comprises a riveting assembly movable along a cross slide rail and a dynamic pressure fixing system composed of a pair of T-shaped shafts; the control unit is a controller with a built-in riveting track database and a quality monitoring module; during operation, the workpiece is positioned in the concave die, the T-shaped shafts are partitioned and fixed, the riveting assembly automatically completes the pressure connection of all rivet points according to the preset track, and the riveting quality can be evaluated online; the present application solves the problems of low efficiency and unstable quality of the existing manual riveting, realizes efficient, automatic and high-quality production of the lightning protection metal mesh and the conductor connection of the carbon fiber blade, and greatly improves the lightning protection reliability of the wind turbine blade.

Description

Technical Field

[0001] This invention relates to the field of wind turbine manufacturing technology, and in particular to a lightning protection metal mesh riveting device for carbon fiber blades. Background Technology

[0002] As the wind power industry develops towards larger and more efficient models, the blade length of wind turbines is constantly increasing. Carbon fiber composite materials, due to their excellent mechanical properties, are widely used in key components such as the main beam structure of large blades. However, while carbon fiber materials have a certain degree of conductivity, their resistivity is high, making them unable to directly withstand and discharge enormous lightning currents (up to 200kA). Therefore, it is necessary to integrate a dedicated lightning protection system on or inside the surface of the carbon fiber blade. One of the core components is the lightning protection metal mesh laid on the blade surface. This metal mesh must be connected using low-resistance, high-reliability methods and have a larger cross-sectional area (typically 50~70mm²). 2 The metal conductor (down conductor) is connected to the blade root grounding point, thereby safely guiding the lightning current to the blade root grounding point and protecting the blade from lightning damage.

[0003] Currently, the industry commonly uses riveting to achieve the mechanical and electrical connection between lightning protection metal mesh and metal conductors. Existing technical solutions rely entirely on manual operation: workers need to manually align each rivet with a pre-drilled hole on the workpiece and then use tools to hammer them together one by one. This traditional method has significant drawbacks when applied to the large-scale production of wind turbine blades: First, production efficiency is extremely low, as it is impossible to rivet multiple rivets simultaneously, resulting in long working hours and becoming a bottleneck in the blade production line. Second, the riveting quality is unstable, depending entirely on the operator's skill and sense of responsibility. It is difficult to maintain uniformity in the hammering force and the shape of the rivet head, which can easily lead to weak connections or excessive contact resistance at some riveting points, making it difficult to meet the stringent requirement of conducting 200kA lightning current and posing a safety hazard for the long-term operation of wind turbines. Finally, manual operation has low positioning accuracy and lacks effective online quality monitoring and data recording methods, which is not conducive to product quality traceability and process optimization.

[0004] Therefore, an automated riveting device for lightning protection metal mesh on carbon fiber blades is provided. This device can significantly improve production efficiency and product quality consistency, and ensure the safe operation of wind turbines. By integrating embedded positioning fixtures, multi-axis linkage riveting actuators, and intelligent control units, an automated riveting system is constructed, realizing the automatic continuous production of multiple rivets for riveting lightning protection metal mesh on carbon fiber blades of wind turbines, resulting in an order-of-magnitude increase in production efficiency. At the same time, the constant riveting force and stroke of the machine ensure that each riveting point has consistent and excellent quality, guaranteeing the reliability of the lightning protection connection. This solves the problems of low efficiency and unstable quality of traditional manual riveting, thereby greatly improving the production efficiency and manufacturing quality of lightning protection systems for carbon fiber blades of wind turbines. Summary of the Invention

[0005] In order to overcome the problems of extremely low production efficiency, poor riveting quality stability and low positioning accuracy of manual operation in the existing technology of riveting the lightning protection metal mesh of wind turbine carbon fiber blades.

[0006] The technical solution of this invention is: a lightning protection metal mesh riveting device for carbon fiber blades, comprising: An embedded workbench includes a base, a positioning die fixedly installed on the base for positioning carbon fiber blade lightning protection components, a sinking block that can move up and down relative to the positioning die, and a rivet pre-installation station set on the sinking block for pre-placing multiple countersunk rivets. The riveting execution unit includes at least one riveting component that can move along a predetermined trajectory, and a dynamic clamping system for dynamically clamping the lightning protection component during the riveting process. The control unit is electrically connected to the riveting execution unit and is used to control the riveting assembly to move along a preset riveting trajectory and perform riveting operations, as well as to control the coordinated operation of the dynamic pressing system. The dynamic clamping system includes at least one pair of independently controllable T-shaped shafts, which are mounted on a drive mechanism and can move to the corresponding position according to the current working area of ​​the clamping assembly and apply clamping force to the non-current riveting area of ​​the lightning protection component.

[0007] Preferably, a complete automated riveting system is constructed by integrating embedded positioning fixtures, multi-axis linkage riveting actuators, and intelligent control units, thereby solving the problems of low riveting efficiency and unstable quality in existing technologies.

[0008] Preferably, the riveting assembly is connected by a cross-shaped slide rail mechanism, which is installed above the embedded worktable and is used to drive the riveting assembly to move and position in the horizontal plane along the X and Y axes. This structure enables the riveting head to accurately position any rivet hole on the workpiece plane, realizing fully automated operation and replacing the tedious process of manual positioning.

[0009] Preferably, the pair of T-shaped shafts in the dynamic clamping system are driven by a single-axis slide rail bidirectional drive mechanism, which can move towards or away from each other. During operation, the two T-shaped shafts can flexibly adjust their clamping positions. For example, when riveting the middle of the workpiece, the two shafts move towards each other to clamp the workpiece from both sides. When riveting the edge of the workpiece, one shaft can be reset and retracted, while the other shaft clamps separately, which greatly enhances the adaptability of the equipment to different riveting areas and workpieces of different sizes.

[0010] Preferably, an elastic element is provided between the sinking block and the positioning die, which allows the sinking block to spring upward under the reset action of the elastic element after the riveting operation is completed. The elastic element is a spring. After the riveting is completed, the control unit commands the clamping force to be released, and the sinking block springs upward under the reset action of the elastic element, pushing the workpiece out of the die. This greatly facilitates the operator in picking up and placing the workpiece and further improves the operating efficiency.

[0011] Preferably, the control unit has a built-in riveting trajectory database, which stores motion trajectory files generated based on the drawing coordinates and hardware offset parameters of different carbon fiber blade lightning protection components to guide the movement of the riveting assembly; thus realizing the digitalization and flexibility of the processing process, different models of products can be switched by simply calling different program files, without the need to change hardware tooling, and it has strong versatility.

[0012] Preferably, the control unit is a programmable logic controller (PLC); the PLC has high reliability, strong anti-interference ability, and is suitable for high-precision motion control in industrial environments. Through programming, complex riveting logic and sequence can be flexibly implemented.

[0013] Preferably, the riveting assembly includes a punch and a riveting drive mechanism, the riveting drive mechanism being configured to provide sufficient pressure to thicken the countersunk rivets, and the riveting drive mechanism being a hydraulic cylinder; the pressure configuration is used to ensure that each rivet is sufficiently deformed to form a reliable mechanical interlock and a low-resistance electrical path, thereby meeting the stringent requirements for conducting 200kA lightning current.

[0014] Preferably, the cross-shaped slide rail mechanism includes a first slide rail, a first actuator motor, a first ball screw, a second slide rail, a second actuator motor, and a second ball screw. The first and second slide rails are vertically distributed in the horizontal direction. The second slide rail and the first ball screw are threadedly connected and slidably connected. The first actuator motor is located at one end of the first slide rail, and its output end is connected to the first ball screw. The second actuator motor is located at one end of the second slide rail, and its output end is connected to the second ball screw. The second ball screw is threadedly connected to the connector of the riveting assembly. By activating the first actuator motor, the first ball screw is driven to rotate, which in turn drives the second slide rail to slide along the direction of the first slide rail. By activating the second actuator motor, the second ball screw is driven to rotate, which in turn drives the connector of the riveting assembly to move linearly along the direction of the second slide rail.

[0015] Preferably, the single-axis slide rail bidirectional drive mechanism includes a third slide rail disposed above the embedded worktable, a third ball screw disposed inside the third slide rail, a third actuator motor disposed at one end of the third slide rail, and a movable frame slidably connected to the third slide rail. The movable frame and the third ball screw are threadedly connected, and the output end of the third ball screw and the third actuator motor are interconnected. The third ball screw is a bidirectional threaded screw. The movable frame and the drive mechanism of the T-shaped shaft are interconnected. The drive mechanism of the T-shaped shaft is a hydraulic cylinder. By starting the third actuator motor, the third ball screw is driven to rotate, and the rotation of the third ball screw drives the two sets of movable frames to move linearly in opposite directions.

[0016] Preferably, the control unit is also connected to a quality monitoring module, which generates and stores a riveting quality report after each riveting operation. This module can generate and store a riveting quality report based on feedback data from a pressure sensor or displacement sensor after each riveting operation, providing data support for product quality traceability and realizing process quality control.

[0017] The beneficial effects of this invention are: This invention, through the aforementioned technical solution, integrates an embedded positioning fixture, a multi-axis linkage riveting actuator, and an intelligent control unit to construct a complete automated riveting system. It solves the problems of low riveting efficiency and unstable quality in existing technologies for riveting lightning protection metal mesh on wind turbine carbon fiber blades. First, the operator places the pre-laid metal mesh and metal plate stacked workpiece into the positioning cavity of the embedded worktable and pre-positions the countersunk rivets within the countersunk block's position. Then, the control unit activates, driving a pair of T-axis shafts of the dynamic pressing system to move to the center of the workpiece and press them firmly. Next, under the drive of the cross slide rail and the control of the PLC program, the riveting assembly automatically moves to above the first rivet coordinate, and the punch descends to complete the precise riveting. The component then automatically moves to the next rivet position according to the preset trajectory file from left to right and top to bottom, repeating the riveting action until all rivets in the central area are completed. After that, the T-axis intelligently moves away or repositions under the command of the control unit to clamp the two ends of the workpiece, and the riveting component continues to complete the work on the remaining rivets. After all is completed, the clamping force is released, and the sinker pushes the workpiece up under the action of the spring, making it easy to remove. The entire process requires no manual intervention, and the quality data of each step is recorded. This process realizes a leap from manual operation of a single rivet to fully automatic continuous production of multiple rivets, and the production efficiency is increased by orders of magnitude. At the same time, the constant force and stroke of the machine riveting ensure that each rivet has consistent and excellent quality, guaranteeing the absolute reliability of the lightning protection connection. Attached Figure Description

[0018] Figure 1 The diagram shown is a three-dimensional structural schematic of the lightning protection metal mesh riveting device for carbon fiber blades according to the present invention. Figure 2 The diagram shown is a cross-sectional view of the lightning protection metal mesh riveting device for carbon fiber blades according to the present invention. Figure 3 The diagram shown is a top view of the lightning protection metal mesh riveting device for carbon fiber blades according to the present invention. Explanation of reference numerals in the attached drawings: 1. Base; 2. Positioning die; 3. Sinking block; 4. Pre-installation station for rivets; 5. Riveting assembly; 6. T-shaped shaft; 7. Cross-shaped slide rail mechanism; 8. Single-axis slide rail bidirectional drive mechanism; 9. Elastic element; 10. Riveting drive mechanism; 701. First slide rail; 702. First actuator motor; 703. First ball screw; 704. Second slide rail; 705. Second actuator motor; 706. Second ball screw; 801. Third slide rail; 802. Third ball screw; 803. Third actuator motor; 804. Moving frame. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Example 1 Please see Figure 1 , Figure 2 ,and Figure 3 A lightning protection metal mesh riveting device for carbon fiber blades, comprising: An embedded workbench includes a base 1, a positioning die 2 fixedly installed on the base 1 for positioning carbon fiber blade lightning protection components, a sinking block 3 that can move up and down relative to the positioning die 2, and a rivet pre-installation station 4 set on the sinking block 3 for pre-placing multiple countersunk rivets. The riveting execution unit includes at least one riveting component 5 that can move along a predetermined trajectory, and a dynamic clamping system for dynamically clamping the lightning protection component during the riveting process. The control unit is electrically connected to the riveting execution unit and is used to control the riveting assembly 5 to move along a preset riveting trajectory and perform riveting operations, as well as to control the coordinated action of the dynamic pressing system. The dynamic clamping system includes at least one pair of independently controllable T-shaped shafts 6, which are mounted on the drive mechanism of the T-shaped shafts 6 and can move to the corresponding position according to the current working area of ​​the clamping assembly 5 and apply clamping force to the non-current riveting area of ​​the lightning protection component.

[0021] Preferably, a complete automated riveting system is constructed by integrating embedded positioning fixtures, multi-axis linkage riveting actuators, and intelligent control units, thereby solving the problems of low riveting efficiency and unstable quality in existing technologies.

[0022] The riveting assembly 5 is connected by a cross-shaped slide rail mechanism 7, which is installed above the embedded worktable and is used to drive the riveting assembly 5 to move and position in the horizontal plane along the X and Y axes. This structure enables the riveting head to accurately position any rivet hole on the workpiece plane, realizing fully automated operation and replacing the tedious process of manual positioning.

[0023] The dynamic clamping system consists of a pair of T-shaped shafts 6 driven by a single-axis slide rail bidirectional drive mechanism 8, which can move towards or away from each other. During operation, the two T-shaped shafts 6 can flexibly adjust their clamping positions. For example, when riveting the middle of a workpiece, they move towards each other to clamp the workpiece from both sides. When riveting the edge of a workpiece, one of them can be reset and retracted, while the other clamps it separately, which greatly enhances the adaptability of the equipment to different riveting areas and workpieces of different sizes.

[0024] An elastic element 9 is provided between the sinker block 3 and the positioning die 2. After the riveting operation is completed, the sinker block 3 can bounce upward under the reset action of the elastic element 9. The elastic element 9 is a spring. After the riveting is completed, the control unit commands the clamping force to be released. The sinker block 3 bounces upward under the reset action of the elastic element 9, pushing the workpiece out of the die. This greatly facilitates the operator in picking up and putting down the workpiece and further improves the operating efficiency.

[0025] The control unit has a built-in riveting trajectory database, which stores motion trajectory files generated based on the drawing coordinates and hardware offset parameters of different carbon fiber blade lightning protection components to guide the movement of the riveting assembly 5. This realizes the digitalization and flexibility of the processing process. Different models of products can be switched by simply calling different program files without changing the hardware tooling, making it highly versatile.

[0026] The control unit is a programmable logic controller (PLC). PLCs are highly reliable, have strong anti-interference capabilities, and are suitable for high-precision motion control in industrial environments. Through programming, complex riveting logic and sequences can be flexibly implemented.

[0027] The riveting assembly 5 includes a punch and a riveting drive mechanism 10. The riveting drive mechanism 10 is configured to provide sufficient pressure to thicken the countersunk rivets. The riveting drive mechanism 10 is a hydraulic cylinder. The pressure configuration is used to ensure that each rivet is fully deformed to form a reliable mechanical interlock and a low-resistance electrical path, thereby meeting the stringent requirements for conducting 200kA lightning current.

[0028] The cross-shaped slide rail mechanism 7 includes a first slide rail 701, a first actuator motor 702, a first ball screw 703, a second slide rail 704, a second actuator motor 705, and a second ball screw 706. The first slide rail 701 and the second slide rail 704 are vertically distributed in the horizontal direction. The second slide rail 704 and the first ball screw 703 are threadedly connected, and the second slide rail 704 and the first slide rail 701 are slidably connected. The first actuator motor 702 is located at one end of the first slide rail 701, and the output end of the first actuator motor 702 is connected to the first ball screw 703. The second actuator motor 705... 5 is located at one end of the second slide rail 704. The output end of the second actuator 705 is connected to the second ball screw 706. The second ball screw 706 and the connecting part of the riveting assembly 5 are threadedly connected. By starting the first actuator 702, the first ball screw 703 is driven to rotate. The rotation of the first ball screw 703 drives the second slide rail 704 to slide along the direction of the first slide rail 701. By starting the second actuator 705, the second ball screw 706 is driven to rotate. The rotation of the second ball screw 706 drives the connecting part of the riveting assembly 5 to move linearly along the direction of the second slide rail 704.

[0029] The single-axis slide rail bidirectional drive mechanism 8 includes a third slide rail 801 mounted above the embedded worktable, a third ball screw 802 mounted inside the third slide rail 801, a third actuator motor 803 mounted at one end of the third slide rail 801, and a movable frame 804 slidably connected to the third slide rail 801. The movable frame 804 is threadedly connected to the third ball screw 802, and the output end of the third ball screw 802 is interconnected with the third actuator motor 803. The third ball screw 802 is a bidirectional threaded screw. The movable frame 804 is interconnected with the drive mechanism of the T-shaped shaft 6, which is a hydraulic cylinder. By starting the third actuator motor 803, the third ball screw 802 is driven to rotate, and the rotation of the third ball screw 802 drives the two sets of movable frames 804 to move linearly in opposite directions.

[0030] The control unit is also connected to a quality monitoring module, which generates and stores a riveting quality report after each riveting operation. This module can generate and store a riveting quality report based on feedback data from pressure or displacement sensors after each riveting operation, providing data support for product quality traceability and realizing process quality control.

[0031] During operation, the operator places the carbon fiber blade lightning protection component, which has been pre-laid with lightning protection metal mesh and metal conductor layers, into the positioning cavity 2 of the embedded workbench, ensuring that the edge of the component is completely fitted with the inner wall of the cavity. Then, multiple countersunk rivets are pre-placed in the rivet pre-installation station 4 of the sinker block 3. At this time, the sinker block 3 is in the lowest position under the action of the elastic element 9, and the rivet head is aligned with the pre-set hole on the surface of the component. The control unit is started, and the system enters the initialization stage. A pair of T-shaped shafts 6 of the dynamic pressing system are adjusted to the initial position through the single-axis slide rail bidirectional drive mechanism 8. The hydraulic cylinder drives the T-shaped shafts 6 to press down to the middle area of ​​the workpiece, applying initial clamping force to the non-riveting area to prevent the component from shifting during the subsequent pressing process. The control unit retrieves the trajectory file of the corresponding blade model from the riveting trajectory database, and drives the first actuator 702 and the second actuator 705 of the cross-shaped slide rail mechanism 7 to work together: the first ball screw 703 rotates to drive the second slide rail 704 to move along the X-axis, and the second ball screw 706 rotates to drive the pressing assembly 5 to move along the Y-axis, so that the punch is accurately positioned above the coordinate of the first rivet; the hydraulic cylinder drives the punch to move downward, and presses the countersunk rivet with constant pressure to form a mechanical interlock; after the pressing is completed, the punch is reset, and the control unit automatically moves the pressing assembly 5 to the next rivet position according to the trajectory file instruction, and repeats the pressing action; during this process, the dynamic pressing system adjusts in real time according to the current working area: when riveting the middle area, the T-shaped shafts 6 keep pressing against each other; when riveting the edge area, the third actuator 803 drives the third ball screw 802 to rotate, so that one side of the T-shaped shaft 6 is reset and retracted, and the other side of the T-shaped shaft 6 is pressed separately to ensure that the workpiece is always stable; After all riveting points are completed, the control unit instructs the hydraulic cylinder to release the clamping force, and the T-shaft 6 retracts to its initial position. At this time, the elastic element 9 in the positioning die 2 resets, pushing the sinker 3 upward to eject the riveted lightning protection component from the die surface, making it easy for operators to quickly remove the part. Simultaneously, the quality monitoring module generates a riveting quality report based on the pressure sensor data during the riveting process, recording the riveting force, stroke, and forming dimensions of each rivet, and storing it in the control unit database for subsequent quality traceability and process analysis. Thus, a single automated riveting process is completed, and the equipment enters standby mode, waiting for the next workpiece to be loaded.

[0032] Through the above steps, an embedded positioning fixture, a multi-axis linkage riveting actuator, and an intelligent control unit are integrated to build a complete automated riveting system; this solves the problems of low riveting efficiency and unstable quality in the existing technology for riveting lightning protection metal mesh on wind turbine carbon fiber blades.

[0033] Example 2 Optionally, the present invention provides another embodiment, which replaces the existing technology of riveting lightning protection metal mesh on carbon fiber blades of wind turbines with an automated system that integrates precision mechanical structure, servo drive and programmable logic control; its workflow can be decomposed into preparation stage, middle riveting stage, end riveting stage and completion stage.

[0034] During the preparation phase, the operator first places the stack of workpieces to be riveted (including the lower metal plate, the middle lightning protection metal mesh, and the upper metal plate) precisely into the positioning die 2 of the embedded worktable; the shape of the die matches the shape of the workpiece to ensure accurate positioning; then, the specified number and specifications of rivets are placed one by one into the corresponding rivet pre-installation station 4 holes on the sinker 3. On the control panel, the operator selects a machining program matching the current workpiece model from the riveting trajectory database of the control unit; this program contains the coordinate sequence of all rivet holes and the coordinated action instructions of the dynamic clamping system; the coordinate sequence of the rivet holes is denoted as... .

[0035] The middle riveting stage specifically includes the following steps: Step 1: The operator presses the start button; the controller first controls the servo motor that drives the dynamic pressing system; a pair of T-shaped shafts 6 move towards each other on a single-axis slide rail, move to the middle area of ​​the workpiece in the length direction and move downward, and use their T-shaped heads to press the non-riveting area of ​​the workpiece, firmly fixing the workpiece in the positioning die 2, preventing it from shifting or lifting during the subsequent riveting process. Step 2: The riveting assembly 5 moves above the first rivet coordinate point P1 set in the program, driven by the servo motor via the cross-shaped slide rail mechanism 7; the controller sends a command to the drive mechanism of the riveting assembly 5, and the punch moves downward at a set constant speed v; its downward pressure F is preset by the system and controlled in a closed loop to ensure stable pressure; the punch contacts the rivet and presses it into the pre-set hole of the workpiece stack until the tail of the rivet is thickened, filling the rivet hole and forming a firm connection; the key parameters of the riveting process—downward pressure F, displacement S and time t—are monitored and recorded in real time; Step 3: During the riveting process, the quality monitoring module collects real-time data through the pressure sensor and displacement sensor built into the pressure cylinder; the system uses a riveting quality index Q to evaluate the quality of this riveting online; this index is calculated based on the following formula:

[0036] in: The riveting quality index is a dimensionless number; ideally... It should be infinitely close to 1; set a acceptable range (0.9 ≤ 1). If the value is ≤1.1, and it exceeds this range, it is judged as a defective product and an alarm is triggered; This represents the integral of pressure F over displacement S throughout the entire riveting stroke, and its physical meaning is the total energy (work) consumed in this riveting operation. This indicates the rated pressure value (unit: N) set to achieve the ideal upsetting effect. This is the rated riveting stroke value; The core of this formula lies in the fact that the energy (work) consumed in forming a qualified rivet should be within a predictable range; if the material hardness is too high or there are foreign objects, it will cause F to be too large. >1.1; If the rivet length is too short or the hole diameter is too large, the actual stroke S will be too small. <0.9; The system automatically generates a list containing coordinates for each rivet point. Data packets containing values ​​and pressure-displacement curves are stored in a database to create a full-process quality traceability archive. After the first rivet is completed, the punch moves upward and resets; the riveting assembly 5 moves automatically to the next rivet coordinate point P2 according to the trajectory set by the program (usually from left to right and from top to bottom), repeating the positioning and riveting steps of the riveting assembly 5 and the riveting quality evaluation steps, until all rivets in the central area surrounded by the two T-shaped shafts 6 pressure blocks are completed.

[0037] The end riveting stage specifically includes the following steps: Step 1: After the riveting in the middle area is completed, the controller controls the dynamic clamping system to operate; the two T-shaped shafts 6 move upward to release the clamping and move in opposite directions along the slide rail; one of the T-shaped shafts 6 moves to one end area of ​​the workpiece and moves downward again to clamp; the other T-shaped shaft 6 can be moved to the other end of the workpiece to clamp, or stay in the original position and not be used as the main clamping point, according to the program setting. Step 2: The riveting assembly 5 continues to perform sequential riveting and quality monitoring on the rivet holes in the just-released end area according to the programmed trajectory; Repeat this process until all rivet holes on the workpiece are riveted.

[0038] In the final stage, once the last rivet is completed and passes quality inspection, the controller controls the T-shaped shaft 6 of the dynamic clamping system to fully move upward and reset, releasing all clamping force. Subsequently, the reset force of the elastic element 9 installed below the sinker block 3 is released, lifting the entire sinker block 3 along with the riveted workpiece on it upward, causing it to disengage from the positioning die 2. The operator can then easily remove the workpiece from the slightly raised worktable, thus ending the entire processing cycle.

[0039] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A lightning protection metal mesh riveting device for carbon fiber blades, characterized in that: include: An embedded workbench includes a base (1), a positioning die (2) fixedly installed on the base (1) for positioning carbon fiber blade lightning protection components, a sinking block (3) that can move up and down relative to the positioning die (2), and a rivet pre-installation station (4) set on the sinking block (3) for pre-placing multiple countersunk rivets. The riveting execution unit includes at least one riveting component (5) that can move along a predetermined trajectory, and a dynamic clamping system for dynamically clamping the lightning protection component during the riveting process; The control unit is electrically connected to the riveting execution unit and is used to control the riveting assembly (5) to move along a preset riveting trajectory and perform riveting operations, as well as to control the coordinated action of the dynamic pressing system; the riveting assembly (5) is connected by a cross-shaped slide rail mechanism (7), which is installed above the embedded worktable and is used to drive the riveting assembly (5) to move and position in the horizontal plane along the X-axis and Y-axis directions; The riveting assembly (5) moves above the first rivet coordinate point P1 set in the program via the cross-shaped slide rail mechanism (7) driven by the servo motor; the control unit sends a command to the drive mechanism of the riveting assembly (5), and the punch moves downward at a set constant speed v; its downward pressure F is preset by the system and controlled in a closed loop to ensure stable pressure; the punch contacts the rivet and presses it into the preset hole of the workpiece stack until the tail of the rivet is thickened, filling the rivet hole and forming a firm connection; the key parameters of the riveting process, pressure F, displacement S and time t, are monitored and recorded in real time; During the riveting process, the quality monitoring module collects real-time data through the pressure and displacement sensors built into the pressure cylinder; the system uses a riveting quality index Q to evaluate the quality of the riveting online; this index is calculated based on the following formula: in: The riveting quality index is a dimensionless number; ideally... It should be infinitely close to 1; set a acceptable range of 0.9 ≤ If the value is ≤1.1, the product will be deemed defective and an alarm will be triggered if it exceeds this range. This represents the integral of pressure F over displacement S throughout the entire riveting stroke, and its physical meaning is the total energy consumed in this riveting operation. This indicates the rated pressure value set to achieve the ideal upsetting effect, in N; This is the rated riveting stroke value; The core of this formula lies in the fact that the energy consumed in forming a qualified rivet should be within a predictable range; if the material hardness is too high or there are foreign objects, it will cause F to be too large. >1.1; If the rivet length is too short or the hole diameter is too large, the actual stroke S will be too small. <0.9; The system automatically generates a list containing coordinates for each rivet point. Data packets containing values ​​and pressure-displacement curves are stored in a database to create a full-process quality traceability archive. The dynamic clamping system includes at least one pair of independently controllable T-shaped shafts (6). The T-shaped shafts (6) are mounted on the drive mechanism of the T-shaped shafts (6) and can move to the corresponding position according to the current working area of ​​the clamping assembly (5) and apply clamping force to the non-current riveting area of ​​the lightning protection component.

2. The lightning protection metal mesh riveting device for carbon fiber blades according to claim 1, characterized in that: The pair of T-shaped shafts (6) of the dynamic compression system are driven by a single-axis slide rail bidirectional drive mechanism (8) and can move towards or away from each other.

3. The lightning protection metal mesh riveting device for carbon fiber blades according to claim 1, characterized in that: An elastic element (9) is provided between the sinking block (3) and the positioning die (2) to allow the sinking block (3) to bounce upward under the reset action of the elastic element (9) after the riveting operation is completed.

4. The lightning protection metal mesh riveting device for carbon fiber blades according to claim 1, characterized in that: The control unit has a built-in riveting trajectory database, which stores motion trajectory files generated based on the drawing coordinates and hardware offset parameters of different carbon fiber blade lightning protection components to guide the movement of the riveting assembly (5).

5. The lightning protection metal mesh riveting device for carbon fiber blades according to claim 4, characterized in that: The control unit is a programmable logic controller.

6. The lightning protection metal mesh riveting device for carbon fiber blades according to claim 1, characterized in that: The riveting assembly (5) includes a punch and a riveting drive mechanism (10), which is configured to provide sufficient pressure to thicken the countersunk rivet. The riveting drive mechanism (10) is a hydraulic cylinder.

7. The lightning protection metal mesh riveting device for carbon fiber blades according to claim 1, characterized in that: The cross-shaped slide rail mechanism (7) includes a first slide rail (701), a first actuator motor (702), a first ball screw (703), a second slide rail (704), a second actuator motor (705), and a second ball screw (706). The first slide rail (701) and the second slide rail (704) are vertically distributed in the horizontal direction. The second slide rail (704) and the first ball screw (703) are threadedly connected, and the second slide rail (704) and the first slide rail (701) are slidably connected. The first actuator motor (702) is located at one end of the first slide rail (701), and the output end of the first actuator motor (702) is connected to the first ball screw (703). The second actuator motor (705) is located at one end of the second slide rail (704), and the output end of the second actuator motor (705) is connected to the second ball screw (706). The second ball screw (706) and the connecting piece of the riveting assembly (5) are threadedly connected.

8. A lightning protection metal mesh riveting device for carbon fiber blades according to claim 2, characterized in that: The single-axis slide rail bidirectional drive mechanism (8) includes a third slide rail (801) disposed above the embedded worktable, a third ball screw (802) disposed inside the third slide rail (801), a third actuator motor (803) disposed at one end of the third slide rail (801), and a movable frame (804) slidably connected to the third slide rail (801). The movable frame (804) and the third ball screw (802) are threadedly connected. The output end of the third ball screw (802) and the third actuator motor (803) are interconnected. The third ball screw (802) is a bidirectional threaded screw. The movable frame (804) and the drive mechanism of the T-shaped shaft (6) are interconnected. The drive mechanism of the T-shaped shaft (6) is a hydraulic cylinder.

9. A lightning protection metal mesh riveting device for carbon fiber blades according to claim 1, characterized in that: The control unit is also connected to a quality monitoring module, which generates and stores a riveting quality report after each riveting operation.

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