Intelligent welding system and method for high-strength light mining truck

Abstract

This invention discloses an intelligent welding method for high-strength, lightweight mining trucks. Welding is performed using a welding fixture. The fixture's base plate has a support plate with a pressure sensor and a lifting cylinder to support and sense workpiece pressure. A quick-change interface is located on the side of the base plate. Clamping components are inserted through the bottom connection and have identification tags, allowing for selective installation based on a production task list. Each quick-change interface has a push rod assembly. A single motor drives a rotating shaft, which in turn drives a cam to raise and lower the push rod. The clamping component's pressure rod is hinged in the middle, with both ends engaging with the push rod and the workpiece respectively to achieve clamping. After installation, the motor-driven rotating shaft stops driving when the number of pressure-compliant points exceeds a set threshold. For points that do not meet the threshold, the corresponding cylinder support force is independently adjusted until all points meet the threshold. This method combines centralized driving with independent fine-tuning, simplifying the fixture structure and enabling quick changeovers, while simultaneously ensuring clamping efficiency and accuracy.

Description

Technical Field

[0001] This invention belongs to the field of mining truck manufacturing technology, and particularly relates to an intelligent welding system and method for high-strength, lightweight mining trucks. Background Technology

[0002] Mining dump trucks (hereinafter referred to as "mining trucks") are core transportation equipment in mining and earthmoving projects. Their frames, cargo boxes, and other structural components are typically welded from high-strength steel. With the increasing demands for energy conservation, emission reduction, and transportation efficiency in the mining industry, high-strength and lightweight construction has become a significant trend in the development of mining trucks. Using high-strength, lightweight materials (such as high-strength steel and aluminum alloys) to manufacture mining truck structural components can effectively reduce the overall vehicle weight while ensuring load-bearing capacity, thereby improving load-bearing efficiency and fuel economy.

[0003] Welding is a critical process in the manufacturing of mining truck structural components, and the welding quality directly affects the overall strength, service life, and safety of the mining truck. Traditional mining truck welding operations typically use fixed welding fixtures for positioning and clamping, and the welding operation is completed manually or semi-automatically.

[0004] However, existing mining card welding technology has the following technical defects: 1. Poor versatility of welding fixtures and low changeover efficiency: Mining truck structural components are diverse, with significant differences in shape and size between different vehicle models and locations. Traditional welding fixtures typically have fixed clamping mechanisms, meaning one type of fixture can only accommodate one or a few types of workpieces. When the production line switches to different production tasks, the entire fixture needs to be replaced or complex structural adjustments need to be made, resulting in long changeover times, low production efficiency, and difficulty in adapting to the flexible production needs of multiple varieties and small batches.

[0005] 2. Inaccurate clamping pressure control leads to a high risk of workpiece deformation: Mining truck structural components often use high-strength, lightweight, thin-plate materials, requiring extremely strict control of clamping force during the welding process. Insufficient clamping force can cause unstable workpiece positioning and weld deviation; excessive clamping force can easily cause deformation of thin-plate workpieces, affecting welding quality and dimensional accuracy. Existing tooling mostly uses mechanical rigid clamping, which cannot adjust the clamping force in real time according to the characteristics of the workpiece, making it difficult to ensure the pressure balance of each support point.

[0006] 3. Lack of real-time monitoring and intelligent feedback mechanisms: Traditional welding fixtures lack real-time monitoring methods for clamping status, making it impossible for operators to accurately know the actual pressure distribution at each support point. During welding, heat deformation of the workpiece may lead to local support failure or abnormal pressure, which existing technologies cannot detect and adjust in time, easily causing welding defects and quality problems.

[0007] In summary, existing mining truck welding technologies are insufficient to meet the high-precision, high-efficiency, and flexible welding requirements of high-strength, lightweight mining truck structural components. There is an urgent need for a welding method and system that can achieve rapid changeover, intelligent pressure control, and automated adjustment. Summary of the Invention

[0008] This invention provides a high-strength, lightweight intelligent welding system and method for mining trucks, which has the advantages of fast clamping component changeover speed and intelligent control.

[0009] Other objects and advantages of the present invention can be further understood from the technical features disclosed herein.

[0010] To achieve one, some, or all of the above objectives or other objectives, this invention provides a high-strength, lightweight intelligent welding method for mining trucks. The welding method includes welding using a welding fixture, which includes a base plate and several brackets mounted on the base plate. Support plates are mounted on the brackets, and the workpiece to be welded is placed on the support plates. Cylinders for lifting the support plates are mounted on the brackets, and pressure sensors are mounted on the support plates. The pressure sensors on the multiple support plates collect pressure data between the workpiece to be welded and the support plates. Quick-change interfaces are provided on the sides of the base plate, and connecting parts are provided at the bottom of the clamping components. Each clamping component is equipped with an identification tag. Based on a list of clamping components required for the current production task and a corresponding list of quick-change interfaces, the corresponding clamping component is selected and inserted into the corresponding quick-change interface. Each quick-change interface is equipped with a push rod assembly. The bottom of the push rod body of the push rod assembly is equipped with a pulley. The cam cooperates with the pulley and is connected to all the cams through a rotating shaft, which is driven by an external motor. The clamping component includes a base and a hinge seat. The middle part of the pressure rod is hinged to the hinge seat, one end of the pressure rod is hinged to the top of the push rod, and the other end of the pressure rod presses on the workpiece to be welded. After the clamping component is installed, the rotating shaft is driven by the motor to rotate a certain angle. Based on the pressure data values ​​collected between each support plate and the workpiece to be welded, a threshold value for the number of pressure values ​​is set. When the number of pressure data values ​​between the workpiece to be welded and the support plate that reach the standard value range exceeds the threshold value, the motor drive is stopped. For the pressure data between the workpiece to be welded and the support plate that do not reach the standard value range, the supporting force of the cylinder of the corresponding support plate is adjusted until the pressure values ​​between all support plates and the workpiece to be welded reach the standard value range.

[0011] Set the threshold for the number of pressure values ​​to be greater than or equal to 50%.

[0012] Based on the list of clamping parts required for the current production task and the corresponding quick-change interface list, select the corresponding clamping parts and insert them into the corresponding quick-change interface. This includes selecting the clamping parts and their installation positions on the welding fixture based on the shape of the workpiece to be welded and the weld position, thereby generating the list of clamping parts required for the current production task and the corresponding quick-change interface list.

[0013] A spring plate is also provided at the bottom of the top rod body, and the spring body is sleeved on the top rod body and pressed between the spring plate and the bottom surface of the bottom plate.

[0014] The quick-change interfaces on the side of the base plate are evenly spaced; each quick-change interface is provided with a round hole for placing the top rod body.

[0015] The hinge base includes two opposing hinge plates disposed on the top of the base, with corresponding shaft holes on the two hinge plates; a mounting plate is disposed on the bottom of the base, and the mounting plate is installed into the quick-change interface by bolts.

[0016] An extension rod is provided on the base, and a circular sleeve is provided at the end of the extension rod. A connecting post on the pressure block passes through the circular sleeve, and the end of the connecting post is hinged to the end of the pressure rod; the pressure block body is pressed against the surface of the workpiece to be welded.

[0017] Another technical solution of the present invention provides a high-strength, lightweight intelligent welding system for mining trucks, comprising: a welding fixture, the welding fixture including: a base plate, the side of which is provided with a plurality of quick-change interfaces; a plurality of brackets disposed on the base plate, each bracket being provided with a liftable support plate; a cylinder disposed between the brackets and the support plate for driving the support plate to rise and fall; a pressure sensor disposed on the support plate for collecting pressure data between the workpiece to be welded and the support plate; and a push rod drive mechanism including: a push rod assembly, each quick-change interface corresponding to one push rod assembly, the push rod assembly including a push rod body, the bottom of which is provided with a pulley; a cam cooperating with the pulley; a rotating shaft connected to all the cams; and a drive motor connected to the rotating shaft. The system includes: a base for driving the rotating shaft to rotate; a clamping mechanism including several replaceable clamping components, each clamping component including: a base with a connecting part at the bottom that mates with the quick-change interface; a hinge seat located on the top of the base; a pressure rod hinged to the hinge seat in the middle, one end hinged to the top of the top rod body, and the other end for pressing onto the workpiece to be welded; an identification tag located on the clamping component; and a control system including: a controller electrically connected to the pressure sensor, cylinder, and drive motor; a tag identification module for reading the identification tag to identify the identity information of the clamping component; a data processing module for receiving and processing pressure data collected by multiple pressure sensors; and a control decision module for controlling the start and stop of the drive motor and adjusting the support force of each cylinder based on the pressure data.

[0018] The control system further includes: a position matching module, which determines the shape and weld position of the workpiece to be welded based on the current production task, and then determines the installation position of the clamping parts on the welding fixture; a task management module, which generates a list of required clamping parts and a corresponding quick-change interface list based on the current production task and the installation position of the clamping parts on the welding fixture; and a control decision module, which includes: a threshold setting unit, which sets a threshold for the number of pressure values ​​to meet the standard, wherein the threshold is greater than or equal to 50%; a compliance judgment unit, which judges whether the number of pressure data that reaches the standard value range is greater than the threshold; a motor control unit, which controls the drive motor to stop driving when the number of pressure data that reaches the standard value range is greater than the threshold; and a cylinder adjustment unit, which adjusts the cylinder support force of the support plate corresponding to the pressure data that has not reached the standard value range until all pressure data reach the standard value range.

[0019] The identification tag is an RFID tag or a QR code tag, and the tag identification module is a corresponding RFID reader or QR code scanner; the control system also includes a pressure equalization algorithm module, which is used to calculate the adjustment amount of each cylinder when there are differences in the pressure data of each support plate, so that the pressure of each support point tends to be balanced.

[0020] Compared with the prior art, the beneficial effects of the present invention mainly include: 1. Simplified structure and efficient changeover: All clamping components are linked by a single drive motor, a single rotating shaft and multiple cams. The clamping components themselves are pure mechanical components without a power source. With quick-change interfaces and identification tags, changeover only requires plugging and unplugging and bolt tightening. There is no need to disassemble the pipeline, which significantly shortens the changeover time and reduces the tooling manufacturing cost.

[0021] 2. Clamping force multi-source sensing and two-level precise control: The pressure sensor is integrated on the support plate, and a two-level closed-loop control of "centralized drive coarse adjustment + independent fine adjustment of each cylinder" is adopted. By setting the target threshold (such as ≥50%), the overall clamping is completed first, and then the points that do not meet the target are compensated independently. This ensures the reliability of clamping while preventing overpressure damage to the workpiece.

[0022] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the welding fixture of the present invention.

[0025] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0026] Figure 3 for Figure 1 A schematic diagram of the base and hinge structure on the clamping component.

[0027] Figure 4 A schematic diagram showing the arrangement of quick-change interfaces and round holes on the welding fixture.

[0028] Figure 5 This is a schematic diagram of the control system of the present invention.

[0029] In the diagram: 1. Welding fixture; 2. Part to be welded; 3. Cylindrical tube; 4. Top rod body; 41. Spring plate; 42. Spring body; 5. Pulley; 6. Cam; 61. Rotating shaft; 7. Base; 71. Hinge seat; 72. Extension rod; 73. Round sleeve; 74. Mounting plate; 8. Pressure block; 81. Connecting column; 9. Pressure rod; 10. Bracket; 11. Cylinder body; 12. Support plate; 13. Round hole; 14. Quick-change interface. Detailed Implementation

[0030] The foregoing and other technical contents, features, and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front, or back, are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the present invention.

[0031] Example 1 Example 1 provides a smart welding method for high-strength, lightweight mining trucks. This welding method includes welding using a welding fixture 1, which is as follows: Figure 1-4 As shown, the welding fixture 1 includes a base plate and several brackets 10 set on the base plate. Support plates 12 are set on the brackets 10, and the workpiece 2 to be welded is placed on the support plates 12. A cylinder for lifting the support plates 12 is set on the brackets 10, and a pressure sensor is set on the support plates 12. The pressure sensors on the multiple support plates 12 collect the pressure data between the workpiece 2 to be welded and the support plates 12.

[0032] The base plate has a quick-change interface 14 on its side and a connecting part on the bottom of the clamping part; each clamping part has an identification tag; based on the list of clamping parts required for the current production task and the corresponding quick-change interface 14 list, the corresponding clamping part is selected and inserted into the corresponding quick-change interface 14.

[0033] The quick-change interfaces 14 are evenly arranged at equal intervals on the side of the base plate; each quick-change interface 14 is provided with a round hole 13 for placing the top rod body 4. That is, the position of the quick-change interface 14 is opposite to the position of the round hole 13 of the top plate body. Based on the actual welding needs, the corresponding quick-change interface 14 and round hole 13 can be selected, and the required clamping parts can be set to clamp the welding process. It can be adapted to the clamping purpose of different parts 2 to be welded.

[0034] Each quick-change interface 14 is equipped with a push rod assembly. The bottom of the push rod body 4 of each push rod assembly is equipped with a pulley 5. Cams 6 cooperate with the pulleys 5 and are connected to all cams 6 via a rotating shaft 61, which is driven by an external motor. A spring plate 41 is also provided at the bottom of the push rod body 4. A spring body 42 is sleeved on the push rod body 4 and pressed between the spring plate 41 and the bottom surface of the base plate. The spring plate 41 provides spring force, ensuring that the push rod 4 does not protrude from the circular hole 13 when the cams 6 are not compressed. The push rod body 4 passes through the base plate and enters the cylindrical tube 3, where the cams 6 are placed.

[0035] The clamping component includes a base 7 and a hinge seat 71. The middle part of the pressure rod 9 is hinged to the hinge seat 71, one end of the pressure rod 9 is hinged to the top of the top rod 4, and the other end of the pressure rod 9 presses on the workpiece 2 to be welded. After the clamping component is installed, the rotating shaft 61 is driven to rotate a certain angle by a motor. Based on the pressure data values ​​collected between each support plate 12 and the workpiece 2 to be welded, a threshold value for the number of pressure values ​​is set. When the number of pressure data values ​​between the workpiece 2 to be welded and the support plate 12 that reach the standard value range is greater than the threshold value, the motor drive is stopped. For the pressure data between the workpiece 2 to be welded and the support plate 12 that do not reach the standard value range, the supporting force of the cylinder of the corresponding support plate 12 is adjusted until the pressure values ​​between all support plates 12 and the workpiece 2 to be welded reach the standard value range.

[0036] In Example 1, after the clamping components are placed according to actual needs, the pressure value can be adjusted so that the pressure value of each clamping component meets the requirements. Specifically, the clamping force is multi-source sensing and two-level precise control: a pressure sensor is integrated on the support plate 12, and a two-level closed-loop control of "centralized drive coarse adjustment + independent fine adjustment of cylinders at each point" is adopted. By setting a target threshold, the overall clamping is completed first, and then the points that do not meet the target are compensated independently, which ensures the reliability of clamping while preventing overpressure damage to the workpiece.

[0037] As an optional implementation method, a threshold of 50% or more of the pressure values ​​are set.

[0038] As an optional implementation, based on the list of clamping parts required for the current production task and the corresponding list of quick-change interfaces 14, the corresponding clamping parts are selected and inserted into the corresponding quick-change interfaces 14. This includes selecting the corresponding clamping parts and the installation position of the clamping parts on the welding fixture 1 based on the shape of the workpiece 2 to be welded and the weld position, thereby generating the list of clamping parts required for the current production task and the corresponding list of quick-change interfaces 14.

[0039] As an optional implementation, in order to manage the clamping components, each clamping component can be labeled, such as with an RFID tag or a QR code tag. The labels can be used to identify parameters such as the type of each clamping component and the length of the pressure bar. The corresponding clamping component can be selected by scanning or identifying it with a corresponding scanner or identifier.

[0040] As an optional implementation, the hinge base 71 includes two opposing hinge plates disposed on the top of the base 7, with corresponding shaft holes on the two hinge plates; a mounting plate 74 is disposed on the bottom of the base 7, and the mounting plate 74 is installed into the quick-change interface 14 by bolts.

[0041] As an optional implementation, the base 7 is provided with an extension rod 72, and a circular sleeve 73 is provided at the end of the extension rod 72. The connecting post 81 on the pressure block 8 passes through the circular sleeve 73, and the end of the connecting post is hinged to the end of the pressure rod 9. The body of the pressure block 8 is pressed against the surface of the workpiece 2 to be welded. Through the cooperation of the extension rod 72 and the circular sleeve 73, the pressure block 8 can be pressed down vertically, avoiding axial deviation during the pressing process.

[0042] Example 2 Example 2 provides a high-strength, lightweight intelligent welding system for mining trucks, comprising: a welding fixture 1, the welding fixture 1 including: a base plate, the side of which is provided with a plurality of quick-change interfaces 14; a plurality of brackets 10 disposed on the base plate, each bracket 10 being provided with a liftable support plate 12; a cylinder disposed between the brackets 10 and the support plate 12 for driving the support plate 12 to rise and fall; a pressure sensor disposed on the support plate 12 for collecting pressure data between the workpiece 2 to be welded and the support plate 12; and a push rod 4 driving mechanism, including: a push rod assembly, each quick-change interface 14 corresponding to one push rod assembly, the push rod... The assembly includes a push rod body 4, with a pulley 5 at its bottom; a cam 6 that cooperates with the pulley 5; a rotating shaft 61 connected to all the cams 6; a drive motor connected to the rotating shaft 61 for driving the rotating shaft 61 to rotate; and a clamping mechanism including several replaceable clamping components, each of which includes: a base 7 with a connecting part at its bottom that cooperates with the quick-change interface 14; a hinge seat 71 located on top of the base 7; a pressure rod 9 hinged in the middle to the hinge seat 71, with one end hinged to the top of the push rod body 4, and the other end used to press against the workpiece 2 to be welded; and an identification tag located on the clamping component.

[0043] like Figure 5 The control system shown includes: a controller electrically connected to the pressure sensor, cylinder, and drive motor; a tag identification module for reading the identification tag to identify the identity information of the clamping component; a data processing module for receiving and processing pressure data collected by multiple pressure sensors; and a control decision module for controlling the start and stop of the drive motor and adjusting the support force of each cylinder based on the pressure data.

[0044] As an optional implementation, the control system also includes a task management layer, which comprises a task management module and a position matching module. The position matching module, based on the current production task, determines the shape and weld position of the workpiece 2 to be welded, and thus determines the installation position of the clamping component on the welding fixture 1. The position matching module outputs the installation position information and task parameters to the task management module. The task management module, based on the current production task (accepted task parameters) and the installation position of the clamping component on the welding fixture 1 (installation position information), generates a list of required clamping components and a corresponding list of quick-change interfaces 14.

[0045] As an optional implementation, the control decision module includes: a threshold setting unit, used to set a threshold for the number of pressure values ​​to meet a standard, and transmit the set threshold to a compliance judgment unit, wherein the compliance threshold can be set to be greater than or equal to 50%. A compliance judgment unit, based on the pressure data received from the data processing module and the threshold transmitted by the threshold setting unit, determines whether the number of pressure data values ​​reaching the standard value range exceeds the compliance threshold. Upon successful or unsuccessful compliance judgment, the control motor control unit and cylinder adjustment unit execute corresponding adjustment steps.

[0046] The motor control unit is used to control the drive motor to stop driving when the number of pressure data points reaching the standard value range exceeds the threshold. The cylinder adjustment unit is used to adjust the cylinder support force of the support plate 12 corresponding to the pressure data points that have not reached the standard value range until all pressure data points reach the standard value range.

[0047] As an optional implementation, the identification tag is an RFID tag or a QR code tag, and the tag identification module is a corresponding RFID reader or QR code scanner. The control decision module also includes a pressure equalization algorithm module. The pressure equalization algorithm calculates the adjustment amount of each cylinder based on the judgment result output by the standard judgment unit and the pressure data output by the data processing module. When there are differences in the pressure data of each support plate 12 (that is, the threshold has reached 50%, but the pressure data collected by the remaining support plates 12 are different, and it is necessary to perform a separate calibration operation on the pressure data value on each support plate 12), so that the pressure value of each support point reaches the standard value range.

[0048] The above provides a detailed description of the intelligent welding system and method for high-strength, lightweight mining trucks provided by this invention. Specific examples have been used to illustrate the structure and working principle of this invention. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this invention. It should be noted that those skilled in the art can make various improvements and modifications to this invention without departing from its principles, and these improvements and modifications also fall within the scope of protection of the claims of this invention.

Claims

1. A method of intelligent welding for high strength light weight mining truck characterized by, The welding method includes welding using a welding fixture, which includes a base plate and several brackets set on the base plate. A support plate is set on the bracket, and the workpiece to be welded is placed on the support plate. A cylinder for lifting the support plate is set on the bracket, and a pressure sensor is set on the support plate. The pressure sensors on the multiple support plates collect pressure data between the workpiece to be welded and the support plate. The base plate is provided with a quick-change interface on its side, and the bottom of the clamping component is provided with a connecting part; Each clamping component is equipped with an identification tag; Based on the list of clamping parts required for the current production task and the corresponding quick-change interface list, select the corresponding clamping parts and insert them into the corresponding quick-change interfaces. Each quick-change interface is provided with a push rod assembly, and the bottom of the push rod body of each push rod assembly is provided with a pulley. The cam cooperates with the pulley, and is connected to all the cams through a rotating shaft, which is driven by an external motor. The clamping member includes a base and a hinge seat. The middle part of the pressure rod is hinged to the hinge seat, one end of the pressure rod is hinged to the top of the top rod, and the other end of the pressure rod is pressed on the workpiece to be welded. After the clamping component is installed, the rotating shaft is driven by the motor to rotate a certain angle. Based on the pressure data values ​​collected between each support plate and the workpiece to be welded, a threshold value for the number of pressure values ​​is set. When the number of pressure data values ​​collected between the workpiece to be welded and the support plate that reach the standard value range exceeds the threshold value, the motor drive is stopped. For the pressure data between the workpiece to be welded and the support plate that does not reach the standard value range, adjust the supporting force of the cylinder of the corresponding support plate until the pressure values ​​between all support plates and the workpiece to be welded reach the standard value range.

2. The intelligent welding method for high-strength lightweight mining trucks according to claim 1, characterized in that, Set the threshold for the number of pressure values ​​to be greater than or equal to 50%.

3. The intelligent welding method for high-strength lightweight mining trucks according to claim 1, characterized in that, Based on the list of clamping parts required for the current production task and the corresponding quick-change interface list, select the corresponding clamping parts and insert them into the corresponding quick-change interface. This includes selecting the clamping parts and their installation positions on the welding fixture based on the shape of the workpiece to be welded and the weld position, thereby generating the list of clamping parts required for the current production task and the corresponding quick-change interface list.

4. The intelligent welding method for high-strength lightweight mining trucks according to claim 1, characterized in that, A spring plate is also provided at the bottom of the top rod body, and the spring body is sleeved on the top rod body and pressed between the spring plate and the bottom surface of the bottom plate.

5. The intelligent welding method for high-strength lightweight mining trucks according to claim 1, characterized in that, The quick-change interfaces on the side of the base plate are evenly spaced. Each of the quick-change interface locations is provided with a circular hole for placing the top rod body.

6. The intelligent welding method for high-strength lightweight mining trucks according to claim 5, characterized in that, The hinge base includes two hinge plates disposed on the top of the base, which are arranged opposite each other, and the two hinge plates are provided with corresponding shaft holes; The base has a mounting plate at its bottom, which is bolted to the quick-change interface.

7. The intelligent welding method for high-strength lightweight mining trucks according to claim 6, characterized in that, An extension rod is provided on the base, and a circular sleeve is provided at the end of the extension rod. A connecting post on the pressure block passes through the circular sleeve, and the end of the connecting post is hinged to the end of the pressure rod. The pressure block body is pressed against the surface of the workpiece to be welded.

8. A high-strength, lightweight intelligent welding system for mining trucks, characterized in that, include: The welding fixture includes: a base plate with several quick-change interfaces on its side; several brackets on the base plate, each bracket having a liftable support plate; a cylinder between the brackets and the support plate for driving the support plate to rise and fall; and a pressure sensor on the support plate for collecting pressure data between the workpiece to be welded and the support plate. A push rod drive mechanism includes: a push rod assembly, one push rod assembly corresponding to each quick-change interface, the push rod assembly including a push rod body, and a pulley provided at the bottom of the push rod body; a cam, which is configured to cooperate with the pulley; a rotating shaft, which is connected to all the cams; and a drive motor, which is connected to the rotating shaft and is used to drive the rotating shaft to rotate. The clamping mechanism includes several replaceable clamping components. Each clamping component includes: a base with a connecting part at the bottom that mates with the quick-change interface; a hinge seat at the top of the base; and a pressure rod with its middle part hinged to the hinge seat, one end hinged to the top of the top rod body, and the other end used to press against the workpiece to be welded. An identification tag is attached to the clamping component; The control system includes: a controller electrically connected to the pressure sensor, cylinder, and drive motor; a tag identification module for reading the identification tag to identify the identity information of the clamping component; a data processing module for receiving and processing pressure data collected by multiple pressure sensors; and a control decision module for controlling the start and stop of the drive motor and adjusting the support force of each cylinder based on the pressure data.

9. The intelligent welding system for high-strength lightweight mining trucks according to claim 8, characterized in that, The control system further includes a position matching module, which determines the shape of the workpiece to be welded and the position of the weld seam based on the current production task, and then determines the installation position of the clamping part on the welding fixture. The task management module is used to generate a list of required clamping parts and a list of corresponding quick-change interfaces based on the current production task and the installation position of the clamping parts on the welding fixture. The control decision module includes: a threshold setting unit, used to set a threshold for the number of pressure values ​​to meet the standard, wherein the threshold is greater than or equal to 50%; and a standard judgment unit, used to judge whether the number of pressure data that reaches the standard value range is greater than the threshold. The motor control unit is used to control the drive motor to stop driving when the number of pressure data reaching the standard value range exceeds the standard threshold. The cylinder adjustment unit is used to adjust the cylinder support force of the support plate corresponding to pressure data that has not reached the standard value range until all pressure data reaches the standard value range.

10. The intelligent welding system for high-strength lightweight mining trucks according to claim 9, characterized in that, The identification tag is an RFID tag or a QR code tag, and the tag identification module is a corresponding RFID reader or QR code scanner. The control system also includes a pressure equalization algorithm module, which is used to calculate the adjustment amount of each cylinder when there are differences in the pressure data of each support plate, so that the pressure of each support point tends to be balanced.

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