Automatic row welding device and method for reinforcing mesh

Abstract

The invention relates to the technical field of reinforcing mesh welding, in particular to a reinforcing mesh automatic row welding device and method. The system comprises a digital-analog interaction unit, an automatic parameter adjusting unit, a main body welding unit and a digital twinning monitoring unit, and the digital-analog interaction unit is used for receiving reinforcing mesh parameters in a BIM three-dimensional model and outputting a digital instruction; the parameter automatic adjusting unit is used for receiving the digital instruction and real-time feedback data of the sensor and outputting a dynamic adjusting instruction; the main body welding unit is used for receiving the dynamic adjusting instruction and outputting real-time operation data; and the digital twin monitoring unit is used for receiving the real-time operation data and the production data summarized by the full-link data bus, and outputting a model optimization suggestion and an abnormal early warning signal. According to the method, BIM parameters do not need to be artificially transcribed, the parameter conversion error is reduced, the production change debugging time is shortened, and when different meshes are produced and switched, the equipment can automatically adapt to different mesh intervals.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel bar welded mesh, more particularly, to a steel bar welded mesh automatic welding device and method. BACKGROUND

[0002] The current steel bar welded mesh automatic welding device is mainly mechanical automation, and the core technology is concentrated in resistance welding control and mechanical transmission optimization. The steel bar welded mesh is automatically welded by PLC control of mesh pulling servo motor, pneumatic welding cylinder and water cooling system, which can adapt to mesh production of multiple mesh specifications.

[0003] The technical system of the existing equipment has covered the basic process of "wire feeding-positioning-welding-net pulling", and with the further development of intelligent construction technology, there is a lack of cooperation with digital design. The BIM model in the industry can accurately output production parameters such as wire diameter, spacing and size of steel bar welded mesh. The existing welding device cannot directly receive digital model data, and manual conversion of BIM parameters into device operation instructions is required, resulting in a data gap between "design-production".

[0004] In addition, the existing equipment lacks real-time digital monitoring of the production process. Most of the equipment can only display basic running parameters (welding time, net pulling speed) through the touch screen, and cannot compare with the design parameters in the BIM model. It is also impossible to visualize the production state through digital twin technology, which makes it difficult to correct production deviation in time, and the waste rate of steel bar welded mesh is high. SUMMARY

[0005] The present application aims to at least solve one of the technical problems in the related art. To this end, the purpose of the present application is to provide a steel bar welded mesh automatic welding device and method, which can solve the problem that it is impossible to compare with the design parameters in the BIM model, and it is also impossible to visualize the production state through digital twin technology, which makes it difficult to correct production deviation in time, and the waste rate of steel bar welded mesh is high.

[0006] To achieve the above and other related purposes, the present application provides a steel bar welded mesh automatic welding device, comprising:

[0007] A digital model interaction unit is used to receive steel bar welded mesh parameters in a BIM three-dimensional model and output digital instructions;

[0008] A parameter automatic adjustment unit is used to receive the digital instructions and real-time feedback data of the sensor, and output dynamic adjustment instructions;

[0009] A main welding unit is used to receive the dynamic adjustment instructions and output real-time running data;

[0010] A digital twin monitoring unit is configured to receive the real-time operation data and the production data aggregated by the full-link data bus, and output model optimization suggestions and abnormal early warning signals.

[0011] In an embodiment of the present application, the digital-analog interaction unit comprises:

[0012] An Ethernet communication module is configured to receive the steel mesh parameters in the BIM three-dimensional model.

[0013] A digital-analog analysis circuit board is configured to analyze the steel mesh parameters in the BIM three-dimensional model to obtain digital instructions.

[0014] A BIM parameter storage chip is configured to store the steel mesh parameters in the BIM three-dimensional model.

[0015] In an embodiment of the present application, the steel mesh parameters in the BIM three-dimensional model comprise wire diameter, mesh hole spacing, mesh length, and the number N of welding points.

[0016] In an embodiment of the present application, the parameter automatic adjustment unit comprises:

[0017] A PLC controller is configured to receive the digital instructions.

[0018] A welding parameter adjustment module is connected to the output end of the PLC controller, and the welding parameter adjustment module is controlled in welding pressure by the PLC controller.

[0019] An electrode spacing adjustment module is connected to the output end of the PLC controller, and the electrode spacing adjustment module is adjusted in electrode spacing by the PLC controller.

[0020] A mesh drawing parameter adjustment module is connected to the output end of the PLC controller, and the mesh drawing parameter adjustment module is set in mesh drawing step distance by the PLC controller.

[0021] In an embodiment of the present application, the welding parameter adjustment module comprises a proportional pressure-reducing valve and a welding time relay; the electrode spacing adjustment module comprises a stepping motor and a ball screw; and the mesh drawing parameter adjustment module comprises a servo driver and an encoder.

[0022] In an embodiment of the present application, the parameter automatic adjustment unit is communicatively connected to the digital-analog interaction unit through an RS485 bus.

[0023] In an embodiment of the present application, the main body welding unit comprises a main body rack, a weft hopper mechanism, an upper electrode pressure beam, a lower electrode bottom beam, a mesh drawing trolley, and a water cooling system.

[0024] In an embodiment of the present application, the digital twin monitoring unit comprises a data acquisition module, a 5G communication module and a display screen.

[0025] In an embodiment of the present application, the data acquisition module comprises a current sensor, a position sensor and a high-definition camera.

[0026] The present application also provides an automatic mesh welding method, comprising:

[0027] S1, receiving the mesh parameters in the BIM three-dimensional model through the digital-analog interaction unit and outputting digital instructions;

[0028] S2, receiving the digital instructions and real-time feedback data of the sensor through the parameter automatic adjustment unit and outputting dynamic adjustment instructions;

[0029] S3, receiving the dynamic adjustment instructions through the main welding unit and outputting real-time operation data;

[0030] S4, receiving the real-time operation data and production data aggregated by the full-link data bus through the digital twin monitoring unit and outputting model optimization suggestions and abnormal early warning signals.

[0031] As described above, the present application provides an automatic mesh welding device and method, which has the following beneficial effects:

[0032] The present application provides an automatic mesh welding device and method, which does not require manual transcription of BIM parameters, reduces parameter conversion errors, shortens production debugging time, and automatically adapts to different mesh hole spacings when producing different mesh pieces.

[0033] The present application provides an automatic mesh welding device and method, which improves production precision and qualification rate, accurately controls welding pressure, electrode spacing and other parameters through digital-analog instructions, reduces mesh size deviation and improves welding qualification rate.

[0034] The present application provides an automatic mesh welding device and method, which is more efficient in monitoring and response, can shorten parameter deviation warning time, remotely check production status through 5G and improve fault response efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a schematic diagram of the overall structure of an automatic mesh welding device according to an embodiment of the present application;

[0036] Figure 2 is a digital twin monitoring interface schematic diagram of an automatic mesh welding device according to an embodiment of the present application;

[0037] Figure 3is a schematic diagram of a digital-analog interaction unit of a steel bar mesh automatic arranging and welding device according to an embodiment of the present application;

[0038] Figure 4 is a schematic diagram of a parameter automatic adjustment unit of a steel bar mesh automatic arranging and welding device according to an embodiment of the present application;

[0039] Figure 5 is a schematic diagram of a main welding unit of a steel bar mesh automatic arranging and welding device according to an embodiment of the present application;

[0040] Figure 6 is a schematic diagram of a digital twin monitoring unit of a steel bar mesh automatic arranging and welding device according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] Other advantages and / or effects of the present application will be more clearly understood from the following specific examples, and those skilled in the art can easily understand other advantages and / or effects of the present application from the contents disclosed in the specification. The present application can also be implemented or applied in other different specific embodiments, and each detail in the specification can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0042] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner, and only the components related to the present application are shown in the diagrams, not the number, shape and size of the components when actually implemented. The shape, number and ratio of each component when actually implemented can be arbitrarily changed, and the layout pattern of the components can also be more complex.

[0043] Terms such as first or second can be used to describe various components, but these components are not limited by the above terms. The above terms are used to distinguish one component from another, for example, a first component can be referred to as a second component, and likewise, a second component can be referred to as a first component without departing from the scope of the concept according to the present disclosure.

[0044] In addition, "connected / coupled" means that one component is directly electrically coupled to another component or indirectly electrically coupled through another component. The singular form can include the plural form as long as it is not explicitly stated in the sentence. In addition, "comprising / including" or "comprising / including" used in the specification means that one or more components, steps, operations and elements are present or have been added. The specific structure or function description of the example of the embodiment of the concept disclosed in the specification is only exemplified to describe the example of the embodiment according to the concept, and the example of the embodiment according to the concept can be implemented in various forms, but these descriptions are not limited to the example of the embodiment described in the specification.

[0045] According to the concept, various modifications and changes can be applied to the examples of the embodiments, so that the examples of the embodiments will be illustrated in the drawings and described in the specification. However, the examples of the embodiments according to the concept are not limited to the specific embodiments, but include all changes, equivalents, or substitutions included in the spirit and technical scope of the present disclosure.

[0046] It should be understood that when an element is described as "coupled" or "connected" to another element, it can be directly coupled or connected to the other element, or it can be coupled or connected to the other element through a third element. On the contrary, it should be understood that when an element is described as "directly connected to" or "directly coupled to" another element, no other element is interposed therebetween. Other expressions describing the relationship between components (i.e., "between" and "directly between" or "adjacent" and "directly adjacent") should be interpreted in the same manner.

[0047] The terms used in the present specification are merely used to describe specific examples of the embodiments, and are not intended to limit the present disclosure. If there is no clear opposite meaning in the context, the singular form can include the plural form. In the present specification, it should be understood that the term "include" or "have" indicates that there is the features, numbers, steps, operations, components, parts or combinations thereof described in the specification, but does not preclude the possibility of existence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0048] If there is no opposite definition, all terms used herein (including technical terms or scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. If a term defined in a generally used dictionary is not clearly defined in the present specification, it should be interpreted as having the same meaning as in the context of the relevant technology, and not as an ideal or overly formal meaning.

[0049] Descriptions of well-known components and processing techniques can be omitted so as not to unnecessarily obscure the embodiments of the present disclosure.

[0050] Throughout the specification, the same reference numerals refer to the same elements. Therefore, even if the reference numerals are not mentioned or described with reference to one drawing, the reference numerals can be mentioned or described with reference to another drawing. In addition, even if the reference numerals are not shown in one drawing, the reference numerals can be mentioned or described with reference to another drawing.

[0051] Additionally, the logic levels of signals can be different from or opposite to those described. For example, a signal described as having a logic "high" level can alternatively have a logic "low" level, and a signal described as having a logic "low" level can alternatively have a logic "high" level.

[0052] The embodiments of the present disclosure will be described in detail below with reference to the drawings. However, those of ordinary skill in the art can understand that, in the embodiments of the present disclosure, many technical details are presented in order to enable the reader to better understand the present disclosure. However, the technical solutions claimed by the present disclosure can be implemented even without these technical details and various changes and modifications based on the following embodiments.

[0053] Please refer to Figure 1 , Figure 1 is a schematic diagram of the overall structure of a steel bar mesh automatic welding device according to an embodiment of the present application. The present application provides a steel bar mesh automatic welding device, comprising: a digital-analog interaction unit, a parameter automatic adjustment unit, a main welding unit, and a digital twin monitoring unit. The digital-analog interaction unit is used to receive the steel bar mesh parameters in the BIM three-dimensional model and output digital instructions. The parameter automatic adjustment unit is used to receive the digital instructions and real-time feedback data from sensors and output dynamic adjustment instructions. The main welding unit is used to receive the dynamic adjustment instructions and output real-time operation data. The digital twin monitoring unit is used to receive the real-time operation data and production data aggregated by the full-link data bus, and output model optimization suggestions and abnormal early warning signals.

[0054] The steel bar mesh automatic welding device of the present application adds new digital-analog driving related structures on the basis of traditional pneumatic welding equipment. The overall device is composed of four parts: a digital-analog interaction unit, a parameter automatic adjustment unit, a main welding unit, and a digital twin monitoring unit. Each unit is connected through hardware interfaces and circuits to realize full-process automation of "digital-analog parameters-equipment operation-monitoring feedback".

[0055] The digital-analog interaction unit, the parameter automatic adjustment unit, the main welding unit, and the digital twin monitoring unit realize full-process linkage through electrical signals and hardware interfaces. The core logic of the specific connection relationship is that the digital-analog interaction unit issues instructions, the parameter automatic adjustment unit executes control, the main welding unit completes production, and the digital twin monitoring unit displays the state.

[0056] Please refer to Figure 3 , Figure 3This is a schematic diagram of the digital model interaction unit of an automatic rebar mesh welding device according to an embodiment of the present invention. The digital model interaction unit includes: an Ethernet communication module, a digital model parsing circuit board, and a BIM parameter storage chip. The Ethernet communication module is used to receive rebar mesh parameters in the BIM 3D model; the digital model parsing circuit board is used to parse the rebar mesh parameters in the BIM 3D model to obtain digital instructions; and the BIM parameter storage chip is used to store the rebar mesh parameters in the BIM 3D model.

[0057] In one embodiment of the present invention, the output end of the digital model interaction unit is connected to the input end of the parameter automatic adjustment unit. The BIM three-dimensional model can also be a CAD three-dimensional model. The steel mesh parameters in the BIM three-dimensional model include wire diameter, mesh spacing, mesh length, and the number of welding points N. The digital instructions include a standardized processing parameter package, which may be, but is not limited to, JSON format, including weld point coordinates, welding current parameters, and pressure parameters.

[0058] Please see Figure 4 , Figure 4 This is a schematic diagram of the automatic parameter adjustment unit of an automatic rebar mesh welding device according to an embodiment of the present invention. The automatic parameter adjustment unit includes: a PLC controller, a welding parameter adjustment module, an electrode spacing adjustment module, and a mesh pulling parameter adjustment module. The PLC controller receives digital instructions; the welding parameter adjustment module is connected to the output terminal of the PLC controller, and the PLC controller controls the welding pressure of the welding parameter adjustment module; the electrode spacing adjustment module is connected to the output terminal of the PLC controller, and the PLC controller adjusts the electrode spacing of the electrode spacing adjustment module; the mesh pulling parameter adjustment module is connected to the output terminal of the PLC controller, and the PLC controller sets the mesh pulling step distance of the mesh pulling parameter adjustment module.

[0059] In one embodiment of the present invention, the output terminal of the automatic parameter adjustment unit is connected to the input terminal of the main welding unit. The output terminal of the automatic parameter adjustment unit outputs dynamic adjustment commands, which include electrode position compensation values, welding timing pulse signals, and cylinder pressure thresholds.

[0060] Specifically, the welding parameter adjustment module includes a proportional pressure reducing valve and a welding time relay; the electrode spacing adjustment module includes a stepper motor and a ball screw; and the mesh pulling parameter adjustment module includes a servo driver and an encoder.

[0061] Specifically, the automatic parameter adjustment unit communicates with the digital-analog interaction unit via an RS485 bus.

[0062] Please see Figure 5 , Figure 5This is a schematic diagram of the main welding unit of an automatic rebar mesh welding device according to an embodiment of the present invention. The main welding unit includes a main frame, a weft wire hopper mechanism, an upper electrode pressure beam, a lower electrode bottom beam, a mesh pulling trolley, and a water cooling system.

[0063] In one embodiment of the present invention, the output end of the main welding unit is connected to the input end of the digital twin monitoring unit, and the real-time operating data includes, but is not limited to, the actual welding current, the electrode temperature value, and the rebar positioning error value.

[0064] Please see Figure 6 , Figure 6 This is a schematic diagram of a digital twin monitoring unit for an automatic rebar mesh welding device according to an embodiment of the present invention. The digital twin monitoring unit includes a data acquisition module, a 5G communication module, and a display screen.

[0065] In one embodiment of the present invention, the output of the digital twin monitoring unit is connected to the input of the digital-analog interaction unit and the parameter adjustment unit. The model optimization suggestion includes a solder joint spacing correction value, and the abnormal warning signal includes an electrode wear warning.

[0066] In one embodiment of the present invention, the Ethernet communication module is connected to the cloud BIM platform via a network cable to receive family library model data; the digital model analysis circuit board is connected to the parameter storage chip via an SPI interface, and simultaneously communicates with the PLC of the parameter automatic adjustment unit via an RS485 bus.

[0067] The system receives the steel mesh parameters (wire diameter D, mesh spacing S, mesh length L, number of welding points N) from the BIM model, parses them, and converts them into digital instructions that the equipment can recognize.

[0068] Please see Figure 2 , Figure 2 This is a schematic diagram of the digital twin monitoring interface of an automatic rebar mesh welding device according to an embodiment of the present invention. The rebar mesh BIM model view displays the BIM design 3D model of the rebar mesh, named "WP-B-200," with key design parameters marked: wire diameter φ6mm, mesh spacing 200mm, and mesh dimensions 1500*3000mm. The actual production data view includes: ① real-time data of the mesh pulling step distance, currently 200mm; ② welding current curve (horizontal axis: time / s, vertical axis: current / A, currently stable at 180A, threshold range 170-190A).

[0069] Live video view: Real-time welding scene, focusing on the upper / lower electrode welding area, and can be zoomed in to view the weld status.

[0070] Deviation warning zone: Real-time feedback on production abnormalities, alarms are triggered when the deviation of the screen pulling step is >0.5mm or the current deviation is >5%.

[0071] In one embodiment of the present invention, the digital model parsing circuit board receives the steel mesh parameters (wire diameter D, mesh spacing S, mesh length L, and number of welding points N) of the BIM model in the cloud BIM platform through the Ethernet communication module, and converts them into digital instructions that the device can recognize after being parsed by the circuit board.

[0072] In one embodiment of the present invention, the PLC communicates with the digital-analog interactive unit via an RS485 bus to receive the parsed parameter instructions; the proportional pressure reducing valve is connected to the electrode pressurizing cylinder of the pneumatic welding equipment via an air pipe to control the welding pressure; the stepper motor is connected to the ball screw via a coupling to drive the lower electrode seat to move laterally and adjust the electrode spacing; the servo driver is connected to the mesh pulling servo motor to control the mesh pulling speed and step distance.

[0073] The PLC automatically adjusts key parameters according to the digital model instructions. After receiving the instructions, the PLC controls the proportional pressure reducing valve to adjust the welding pressure, the stepper motor to adjust the electrode spacing, and the servo driver to set the mesh pulling step distance, thus shortening the debugging time.

[0074] In one embodiment of the present invention, the upper electrode pressure beam is connected to the welding cylinder via an insulating plate, and the cylinder is controlled by the proportional pressure reducing valve of the parameter automatic adjustment unit; the lower electrode bottom beam is fixed to the frame by bolts, and the electrode spacing is adjusted by a stepper motor; the mesh pulling trolley is connected to the servo motor via a gear rack and pinion, and is controlled by a servo driver; the water cooling system is connected to the electrode seat via water pipes to cool the welding transformer and the electrode.

[0075] The basic production process of "weft wire blanking - wire positioning - resistance welding - mesh feeding" is completed. The welding transformer adopts a phased power supply mode to avoid current surges and adapt to the welding point requirements in the digital model instructions.

[0076] In one embodiment of the present invention, a current sensor is connected in series in the primary circuit of the welding transformer to collect the welding current; a position sensor is installed on the track of the wire mesh pulling trolley to collect the actual wire mesh pulling step distance; a high-definition camera (with night vision function) is installed on the top of the frame to capture the welding site; each sensor is connected to the PLC through an analog input module, the 5G module communicates with the cloud BIM platform through a network cable, and the display screen is connected to the digital-analog interaction unit through an HDMI interface.

[0077] The system collects welding current, mesh pulling distance, and on-site images in real time, and overlays the BIM model and actual production scene on the screen connected to the computer host. When the deviation between the actual parameters and the digital model exceeds the limit, an audible and visual alarm is automatically triggered.

[0078] The present invention also provides an automatic rebar mesh welding method, comprising:

[0079] S1. Receive the steel mesh parameters from the BIM 3D model through the digital model interaction unit and output digital commands;

[0080] S2. Receive the digital commands and real-time feedback data from the sensors through the parameter automatic adjustment unit, and output dynamic adjustment commands;

[0081] S3. Receive the dynamic adjustment command through the main welding unit and output real-time operating data;

[0082] S4. Receive the real-time operation data and the production data summarized by the end-to-end data bus through the digital twin monitoring unit, and output model optimization suggestions and abnormal warning signals.

[0083] The working principle of the automatic steel mesh welding device of the present invention is as follows:

[0084] Taking the production of "WP-B-200 steel mesh" (wire diameter φ6mm, mesh size 200mm, length 3000mm) as an example, the workflow is as follows:

[0085] Digital Model Parameter Reception: The digital model interaction unit receives the WP-B-200 family model parameters issued by the cloud BIM platform via Ethernet, and the parsing circuit board converts the parameters into equipment instructions such as "electrode spacing 6mm, welding pressure 0.6MPa, mesh pulling step distance 200mm, welding time 200ms" and stores them in the parameter storage chip.

[0086] Automatic parameter adjustment: After the PLC reads the instruction, it controls the stepper motor to drive the lower electrode holder to move and adjust the electrode spacing to 6mm; the proportional pressure reducing valve adjusts the cylinder pressure to 0.6MPa; the servo driver sets the step distance of the mesh pulling servo motor to 200mm;

[0087] Main welding operation: The weft wire hopper feeds the φ6mm weft wire to the welding position. After the wire-pressing cylinder positions the wire, the upper electrode pressurizing cylinder presses down, and the welding transformer is energized to complete the resistance welding. The mesh pulling trolley pulls the mesh in 200mm increments, and the welding is repeated until the length reaches 3000mm. The water cooling system continuously cools the electrodes to ensure welding quality.

[0088] Digital twin monitoring: Current sensors monitor welding current in real time, position sensors collect mesh pulling distance, and cameras capture the status of welding points; data is uploaded to the twin platform via a 5G module, and the BIM model is compared with the actual mesh on the display screen. If the current deviation exceeds 5%, an alarm is immediately triggered and production is suspended.

[0089] In summary, the automatic rebar mesh welding device and method of the present invention eliminates the need for manual transcription of BIM parameters, reducing parameter conversion errors and shortening changeover and debugging time. When switching between different mesh types, the equipment can automatically adapt to different mesh spacings. This improves production accuracy and yield, enabling precise control of parameters such as welding pressure and electrode spacing via digital model commands, reducing rebar mesh dimensional deviations and increasing welding yield. Monitoring and response are more efficient; digital twin monitoring shortens parameter deviation warning time, and production status can be viewed remotely via 5G, improving fault response efficiency.

[0090] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An automatic steel mesh welding device, characterized in that, include: The digital model interaction unit is used to receive the steel mesh parameters from the BIM 3D model and output digital commands; The parameter automatic adjustment unit is used to receive the digital commands and real-time feedback data from the sensors, and output dynamic adjustment commands. The main welding unit is used to receive the dynamic adjustment command and output real-time operating data; The digital twin monitoring unit is used to receive the real-time operating data and the production data summarized by the end-to-end data bus, and output model optimization suggestions and anomaly warning signals.

2. The automatic rebar mesh welding device according to claim 1, characterized in that, The digital-to-analog interaction unit includes: Ethernet communication module, used to receive steel mesh parameters from the BIM 3D model; The digital model analysis circuit board is used to analyze the steel mesh parameters in the BIM three-dimensional model to obtain digital instructions; The BIM parameter storage chip is used to store the steel mesh parameters in the BIM 3D model.

3. The automatic rebar mesh welding device according to claim 2, characterized in that: The parameters of the steel mesh in the BIM 3D model include wire diameter, mesh spacing, mesh length, and number of welding points N.

4. The automatic rebar mesh welding device according to claim 2, characterized in that, The automatic parameter adjustment unit includes: A PLC controller is used to receive the digital instructions; A welding parameter adjustment module is connected to the output terminal of the PLC controller, and the welding pressure is controlled by the PLC controller. An electrode spacing adjustment module is connected to the output terminal of the PLC controller, and the electrode spacing is adjusted by the PLC controller. The net pulling parameter adjustment module is connected to the output terminal of the PLC controller, and the net pulling step distance is set by the PLC controller.

5. The automatic rebar mesh welding device according to claim 4, characterized in that: The welding parameter adjustment module includes a proportional pressure reducing valve and a welding time relay; the electrode spacing adjustment module includes a stepper motor and a ball screw; and the mesh pulling parameter adjustment module includes a servo driver and an encoder.

6. The automatic rebar mesh welding device according to claim 4, characterized in that: The automatic parameter adjustment unit communicates with the digital-analog interaction unit via an RS485 bus.

7. The automatic rebar mesh welding device according to claim 4, characterized in that: The main welding unit includes a main frame, a weft wire hopper mechanism, an upper electrode pressure beam, a lower electrode bottom beam, a mesh pulling trolley, and a water cooling system.

8. The automatic rebar mesh welding device according to claim 7, characterized in that: The digital twin monitoring unit includes a data acquisition module, a 5G communication module, and a display screen.

9. The automatic rebar mesh welding device according to claim 8, characterized in that: The data acquisition module includes a current sensor, a position sensor, and a high-definition camera.

10. An automatic steel mesh welding method, characterized in that, include: S1. Receive the steel mesh parameters from the BIM 3D model through the digital model interaction unit and output digital commands; S2. Receive the digital commands and real-time feedback data from the sensors through the parameter automatic adjustment unit, and output dynamic adjustment commands; S3. Receive the dynamic adjustment command through the main welding unit and output real-time operating data; S4. Receive the real-time operation data and the production data summarized by the end-to-end data bus through the digital twin monitoring unit, and output model optimization suggestions and abnormal warning signals.

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