Welding device with auxiliary positioning structure for sofa iron stand production

Abstract

The invention relates to a sofa iron stand production welding device with an auxiliary positioning structure, which is applied to the technical field of welding and comprises a welding workbench, a welding robot, a clamp mechanism, an auxiliary positioning distance measuring mechanism and an auxiliary positioning analysis system, the auxiliary analysis system comprises a parameter input module, an automatic modeling module, a coordinate generation module, a model mapping module, a data generation module and a measurement control module; according to the invention, dual active detection and verification can be automatically, quickly and accurately carried out before welding, whether the positioning of the metal plate is accurate or not is detected firstly, and then whether the positioning between the metal plate and the metal pipe is accurate or not is detected; and an alarm can be automatically given when it is detected that positioning deviation exists in the metal plate or positioning deviation exists between the metal plate and the metal pipe, so that the welding precision and the welding qualification rate of the sofa leg can be improved, and then the structural strength of the sofa iron stand and the durability of the product are guaranteed.

Description

Technical Field

[0001] The invention relates to a welding device, in particular to a welding device for producing sofa iron frames with an auxiliary positioning structure, which is applied to the technical field of welding. Background Art

[0002] As home furnishing needs evolve, modern sofas have evolved from traditional wooden or fabric-upholstered structures to composite furniture that integrates a variety of materials and mechanical functions. Iron frames, due to their high strength and resistance to deformation, have become the core support structure for mid- to high-end sofas and functional sofas. Whether it's an adjustable functional sofa, a large modular sofa, or a modern minimalist sofa with an emphasis on streamlined design, the iron frame plays a crucial role in supporting the main body's weight and maintaining structural stability.

[0003] Sofa legs are an important part of the sofa's iron frame. As the "terminal supporting component" where the iron frame contacts the ground, the sofa legs are not only the fulcrum for adjusting the overall height of the sofa (such as achieving a "0-wall" design), but also directly affect the sofa's stability (anti-slip), quietness (vibration cushioning) and durability (withstanding frequent friction and impact).

[0004] Sofa legs typically consist of a metal tube and a metal sheet, connected by welding. Previously, the welding process in sofa frame production relied primarily on manual labor. With technological advancements, welding has become increasingly automated, with welding robots gradually replacing traditional manual welding. For example, the sofa seat frame production line disclosed in Chinese invention patent publication number CN110757044B and the sofa armrest frame production line disclosed in Chinese invention patent publication number CN110757045B both utilize welding robots to weld the workpieces.

[0005] When welding the tubes and plates of sofa legs using a welding robot, the alignment between the metal plates and the metal tubes is particularly important. Any deviation in alignment can affect the quality of the sofa legs and the structural strength of the sofa frame, reducing the durability of the product. Although existing welding devices often have some positioning function, they generally lack further detection and alarm mechanisms. When there is a deviation in the alignment between the metal plates and the metal tubes, this phenomenon cannot be detected and an alarm is issued in a timely manner. Therefore, we propose a welding device for sofa frame production with an auxiliary positioning structure. Summary of the Invention

[0006] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is: when there is a positioning deviation between the metal plate and the metal pipe, how to detect and discover this phenomenon in time and issue an alarm.

[0007] To solve the above problems, the present invention provides a welding device for sofa iron frame production with an auxiliary positioning structure, comprising a welding workbench, a welding robot, a clamping mechanism for fixing metal pipes and metal plates in sofa legs, an auxiliary distance measuring mechanism, and an auxiliary distance analysis system. The auxiliary distance measuring mechanism includes multiple distance measuring components, each of which includes a support box embedded in the welding workbench, the top of the support box being configured to be open, an electric push rod fixedly installed in the support box, the output end of the electric push rod fixedly connected to a connecting plate, a distance sensor fixedly installed on the connecting plate, and the height of the distance sensor being located between the upper surface and the lower surface of the metal plate fixed by the clamping mechanism;

[0008] The auxiliary analysis system includes parameter input module, automatic modeling module, coordinate generation module, model mapping module, data generation module, and measurement control module;

[0009] The parameter input module is used to input parameters, the automatic modeling module is used to automatically generate a 3D model, the coordinate generation module is used to construct a Cartesian coordinate system, the model mapping module is used to map the 3D model to the Cartesian coordinate system, the data generation module is used to generate theoretical measurement values, and the analysis and judgment module is used to judge whether the positioning between the metal pipe and the metal plate is accurate based on the theoretical measurement values ​​and the actual measurement values ​​measured by the distance sensor. The measurement control module is signal-connected to the electric push rod and the distance sensor, and the distance sensor is signal-connected to the analysis and judgment module.

[0010] In the above-mentioned welding device for sofa iron frame production with an auxiliary positioning structure, the auxiliary distance measuring mechanism and the auxiliary analysis system work together to automatically detect whether the positioning between the metal plate and the metal pipe is accurate, and can automatically alarm when a positioning deviation is detected between the metal plate and the metal pipe.

[0011] As a further improvement of the present application, the size parameters of the sofa legs are input through the parameter input module, the automatic modeling module automatically generates a corresponding 3D model based on the size parameters of the sofa legs, a point is selected on the welding workbench as a reference point, the coordinate generation module constructs a Cartesian coordinate system with the reference point as the origin, the position parameters between each distance sensor and the reference point and the measurement direction information of the distance sensor are input through the parameter input module, the coordinate generation module generates sensor coordinates for each distance sensor based on the position parameters, and marks the corresponding measurement direction.

[0012] As a further improvement of the present application, after fixing the metal sheet by the clamping mechanism, a vertex is selected on the metal sheet as a mapping point, and the position parameters between the mapping point and the reference point are input through the parameter input module. The model mapping module maps the 3D model of the sofa legs to the Cartesian coordinate system according to the position parameters, and the elevation parameters are input through the parameter module. The data generation module generates theoretical measurement values ​​based on the sensor coordinates and the 3D model in the Cartesian coordinate system.

[0013] As a further improvement of this application, the theoretical measurement values ​​include two types: distance plate theoretical measurement values ​​and distance management measurement values. The distance plate theoretical measurement value is the straight-line distance between the sensor coordinates along the corresponding distance sensor measurement direction and the 3D model. The distance management measurement value is generated as follows: after increasing the sensor coordinates along the Z-axis direction by the corresponding value according to the elevation parameter, the straight-line distance between the sensor coordinates along the corresponding measurement direction and the 3D model.

[0014] As a further improvement of the present application, the tolerance parameters are input through the parameter input module, and the auxiliary analysis system further includes a deviation alarm module. The analysis and judgment logic of the analysis and judgment module is as follows:

[0015] After the metal plate and metal pipe are fixed by the clamp mechanism, the measurement control module controls the distance sensor to measure the distance between it and the metal plate to obtain the actual distance value;

[0016] The analysis and judgment module compares the actual distance plate value with the corresponding theoretical distance plate value. When the deviation between all the actual distance plate values ​​and the corresponding theoretical distance plate values ​​is no more than the tolerance parameter, it is determined that the metal plate is accurately positioned. When the deviation between at least one actual distance plate value and the corresponding theoretical distance plate value is greater than the tolerance parameter, it is determined that there is a deviation in the positioning of the metal plate. The analysis and judgment module controls the deviation alarm module to issue an alarm.

[0017] The measurement control module controls the electric push rod to drive the distance sensor to move upward a corresponding distance according to the lifting parameters, and then controls the distance sensor to measure the distance between it and the metal pipe to obtain the actual measured value of the distance to the pipe;

[0018] The analysis and judgment module compares the actual measured value of the distance to the pipe with the corresponding measured value of the distance to the management. When the deviation between all the actual measured values ​​of the distance to the pipe and the corresponding measured values ​​of the distance to the management is not greater than the tolerance parameter, it is determined that the positioning between the metal plate and the metal pipe is accurate. When the deviation between at least one actual measured value of the distance to the pipe and the corresponding measured value of the distance to the management is greater than the tolerance parameter, it is determined that the positioning between the metal plate and the metal pipe is inaccurate, and the analysis and judgment module controls the deviation alarm module to issue an alarm.

[0019] As another improvement of the present application, the auxiliary analysis system also includes a number management module, which is used to create sofa leg numbers with unique identifiers and bind corresponding configuration parameters, and the configuration parameters include size parameters, position parameters, elevation parameters, and tolerance parameters.

[0020] As another improved supplement to the present application, the auxiliary analysis system also includes a number parameter storage module, which is used to store the sofa leg numbers and corresponding configuration parameters.

[0021] As another improved supplement to the present application, the auxiliary analysis system also includes a number calling module, which is used to read the corresponding configuration parameters from the number parameter storage module according to the sofa leg number selected by the user, and automatically load them into the parameter input module.

[0022] As another improvement of the present application, a lower positioning plate is fixedly installed in the support box. The lower positioning plate is located below the connecting plate, and the top end of the lower positioning plate is against the bottom end of the connecting plate.

[0023] As another improved supplement to the present application, a vertical plate is fixedly installed on the top of the support box, and an upper positioning plate is fixedly connected to the side of the vertical plate close to the connecting plate. The upper positioning plate is located above the connecting plate and the vertical distance between the upper positioning plate and the connecting plate is equal to the lifting parameter.

[0024] In summary, the present application, through the synergistic effect of the auxiliary distance measuring mechanism and the auxiliary analysis system, can automatically, quickly and accurately perform dual active detection and verification before welding, first checking whether the positioning of the metal plate is accurate, and then checking whether the positioning between the metal plate and the metal pipe is accurate, and can automatically alarm when it is detected that there is a positioning deviation of the metal plate or a positioning deviation between the metal plate and the metal pipe, thereby improving the welding accuracy and the welding pass rate of the sofa legs, thereby ensuring the structural strength of the sofa iron frame and the durability of the product; through the joint setting of the number management module, the number parameter storage module, the number calling module, etc., not only can the debugging time during model switching be significantly shortened, but also the workload of parameter input can be reduced, thereby significantly reducing the risk of inaccurate active detection and verification function due to manual input errors, thereby improving the intelligence and reliability of the welding device; through the joint setting of the lower positioning plate, the vertical plate, the upper positioning plate, etc., it is possible to ensure the accuracy of the electric push rod when driving the distance sensor up and down, thereby ensuring the reliability of the active detection and verification function. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of a welding device in the first embodiment of the present application;

[0026] Figure 2 This is a structural diagram of the distance measuring component in the first embodiment of the present application;

[0027] Figure 3 This is a schematic cross-sectional view of the support box in the first embodiment of the present application;

[0028] Figure 4 This is a structural diagram of a sofa leg in the first embodiment of the present application;

[0029] Figure 5 This is a structural block diagram of the auxiliary analysis system in the first embodiment of this application;

[0030] Figure 6 This is an analysis and judgment logic diagram of the analysis and judgment module in the first embodiment of this application;

[0031] Figure 7 This is a structural block diagram of the auxiliary analysis system in the second embodiment of the present application;

[0032] Figure 8 This is a structural diagram of a distance measuring component in the second embodiment of the present application;

[0033] Figure 9 This is a schematic cross-sectional view of the support box in the second embodiment of the present application.

[0034] Description of the numbers in the figure:

[0035] 001, auxiliary distance measuring mechanism; 101, support box; 102, electric push rod; 103, connecting plate; 104, distance sensor; 105, lower positioning plate; 106, vertical plate; 107, upper positioning plate; 002, sofa leg; 201, metal sheet; 202, metal pipe. DETAILED DESCRIPTION

[0036] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0037] The first implementation method:

[0038] Figure 1-6The present invention shows a welding device for producing sofa iron frames with an auxiliary positioning structure, comprising a welding workbench, a welding robot, a clamping mechanism for fixing the metal pipe 202 and the metal sheet 201 in the sofa leg 002, an auxiliary distance measuring mechanism 001, and an auxiliary analysis system (the welding workbench, the welding robot, and the clamping mechanism are all prior art, and their specific structures are not described in detail here). The auxiliary distance measuring mechanism 001 includes multiple distance measuring components, which include a support box 101 embedded in the welding workbench, the top of the support box 101 being configured to be open, an electric push rod 102 being fixedly installed in the support box 101, the output end of the electric push rod 102 being fixedly connected to a connecting plate 103, a distance sensor 104 being fixedly installed on the connecting plate 103, and the height of the distance sensor 104 being located between the upper surface and the lower surface of the metal sheet 201 fixed by the clamping mechanism;

[0039] The auxiliary analysis system includes parameter input module, automatic modeling module, coordinate generation module, model mapping module, data generation module, and measurement control module;

[0040] The parameter input module is used to input parameters, the automatic modeling module is used to automatically generate a 3D model, the coordinate generation module is used to construct a Cartesian coordinate system, the model mapping module is used to map the 3D model to the Cartesian coordinate system, the data generation module is used to generate theoretical measurement values, and the analysis and judgment module is used to judge whether the positioning between the metal pipe 202 and the metal plate 201 is accurate based on the theoretical measurement values ​​and the actual measurement values ​​measured by the distance sensor 104. The measurement control module is signal-connected to the electric push rod 102 and the distance sensor 104, and the distance sensor 104 is signal-connected to the analysis and judgment module.

[0041] The size parameters of the sofa leg 002 are input through the parameter input module, and the automatic modeling module automatically generates a corresponding 3D model based on the size parameters of the sofa leg 002. A point is selected on the welding workbench as a reference point, and the coordinate generation module constructs a Cartesian coordinate system with the reference point as the origin. The position parameters between each distance sensor 104 and the reference point and the measurement direction information of the distance sensor 104 are input through the parameter input module. The coordinate generation module generates sensor coordinates for each distance sensor 104 based on the position parameters and marks the corresponding measurement direction.

[0042] After the metal plate 201 is fixed by the clamp mechanism, a vertex is selected on the metal plate 201 as a mapping point (e.g. Figure 4 The upper left vertex of the upper surface marked in the figure is inputted through the parameter input module, and the position parameters between the mapping point and the reference point are inputted. The model mapping module maps the 3D model of the sofa leg 002 to the Cartesian coordinate system according to the position parameters. The elevation parameters are inputted through the parameter module, and the data generation module generates theoretical measurement values ​​according to the sensor coordinates and the 3D model in the Cartesian coordinate system.

[0043] The theoretical measurement values ​​include two types: the physical measurement value from the plate and the management measurement value. The physical measurement value from the plate is the straight-line distance between the sensor coordinates along the corresponding measurement direction of the distance sensor 104 and the 3D model. The method for generating the management measurement value is: after increasing the sensor coordinates along the Z-axis direction by a corresponding value according to the elevation parameter (the Z-axis is perpendicular to the plane of the welding workbench, the upward direction is the positive direction, and the X-axis and Y-axis are perpendicular to each other in the horizontal plane), the straight-line distance between the sensor coordinates along the corresponding measurement direction and the 3D model.

[0044] Tolerance parameters are input through the parameter input module. The auxiliary analysis system also includes a deviation alarm module. The analysis and judgment logic of the analysis and judgment module is as follows:

[0045] After the metal plate 201 and the metal pipe 202 are fixed by the clamp mechanism, the measurement control module controls the distance sensor 104 to measure the distance between it and the metal plate 201 to obtain the actual distance value;

[0046] The analysis and judgment module compares the actual distance plate measured value with the corresponding theoretical distance plate measured value. When the deviation between all the actual distance plate measured values ​​and the corresponding theoretical distance plate measured values ​​is not greater than the tolerance parameter, it is determined that the metal plate 201 is accurately positioned. When the deviation between at least one actual distance plate measured value and the corresponding theoretical distance plate measured value is greater than the tolerance parameter, it is determined that there is a deviation in the positioning of the metal plate 201. The analysis and judgment module controls the deviation alarm module to issue an alarm.

[0047] The measurement control module controls the electric push rod 102 to move the distance sensor 104 upward by a corresponding distance according to the lifting parameter, and then controls the distance sensor 104 to measure the distance between it and the metal pipe 202 to obtain the actual distance value from the pipe (after the measurement is completed, the measurement control module controls the distance sensor 104 to move the distance sensor 104 downward to reset);

[0048] The analysis and judgment module compares the actual measured value of the distance to the tube with the corresponding measured value of the distance to the tube. When the deviation between all the actual measured values ​​of the distance to the tube and the corresponding measured value of the distance to the tube is not greater than the tolerance parameter, it is determined that the positioning between the metal plate 201 and the metal tube 202 is accurate. When the deviation between at least one actual measured value of the distance to the tube and the corresponding measured value of the distance to the tube is greater than the tolerance parameter, it is determined that the positioning between the metal plate 201 and the metal tube 202 is inaccurate, and the analysis and judgment module controls the deviation alarm module to issue an alarm.

[0049] The present application, through the coordinated action of the auxiliary distance measuring mechanism 001 and the auxiliary analysis system, can automatically, quickly and accurately perform dual active detection and verification before welding, first checking whether the positioning of the metal plate 201 is accurate, and then checking whether the positioning between the metal plate 201 and the metal pipe 202 is accurate, and can automatically alarm when it is detected that there is a positioning deviation of the metal plate 201 or a positioning deviation between the metal plate 201 and the metal pipe 202, thereby improving the welding accuracy and the welding pass rate of the sofa legs 002, thereby ensuring the structural strength of the sofa iron frame and the durability of the product.

[0050] In addition, those skilled in the art can set the detection frequency according to the situation, that is, the detection can be performed every time welding is performed, or once every certain number of welding times.

[0051] The second implementation method:

[0052] See also Figure 7-Figure 9 Unlike the first embodiment, the auxiliary determination and analysis system also includes a number management module, which is used to create a sofa leg number with a unique identifier and bind the corresponding configuration parameters. The configuration parameters include size parameters, position parameters, elevation parameters, and tolerance parameters. The auxiliary determination and analysis system also includes a number parameter storage module, which is used to store the sofa leg number and the corresponding configuration parameters. The auxiliary determination and analysis system also includes a number calling module, which is used to read the corresponding configuration parameters from the number parameter storage module according to the sofa leg number selected by the user, and automatically load them into the parameter input module.

[0053] There are many models of sofa legs 002, and different models of sofa legs 002 have different parameter sizes. When a certain model of sofa legs 002 is processed for the first time, a corresponding sofa leg number is created for the sofa leg 002 through the number management module. Later, when a technician in this field inputs configuration parameters such as size parameters and position parameters through the parameter input module, the number management module will automatically bind the configuration parameters to the sofa leg number and write them into the number parameter storage module for storage. Subsequently, when processing the sofa legs 002 of this model again, the corresponding sofa leg number is directly selected, and the number calling module will read the corresponding configuration parameters from the number parameter storage module and automatically load them into the parameter input module without the need to enter the parameters again; therefore, through the joint setting of the number management module, the number parameter storage module, the number calling module, etc., not only can the debugging time during model switching be significantly shortened, but also the workload of parameter input can be reduced, thereby significantly reducing the risk of inaccuracy of the active detection and verification function due to manual input errors, thereby improving the intelligence and reliability of the welding device.

[0054] A lower positioning plate 105 is also fixedly installed in the support box 101. The lower positioning plate 105 is located below the connecting plate 103, and the top of the lower positioning plate 105 is against the bottom of the connecting plate 103. A vertical plate 106 is fixedly installed on the top of the support box 101. The side of the vertical plate 106 close to the connecting plate 103 is fixedly connected to the upper positioning plate 107. The upper positioning plate 107 is located above the connecting plate 103 and the vertical distance between the upper positioning plate 107 and the connecting plate 103 is equal to the lifting parameter. The electric push rod 1 When 02 drives the distance sensor 104 to move upward, it will move until the connecting plate 103 and the upper positioning plate 107 are against each other. When the electric push rod 102 drives the distance sensor 104 to move downward and reset, it will move until the connecting plate 103 and the lower positioning plate 105 are against each other. Therefore, through the joint arrangement of the lower positioning plate 105, the vertical plate 106, the upper positioning plate 107, etc., the accuracy of the electric push rod 102 in driving the distance sensor 104 to move up and down can be guaranteed, thereby ensuring the reliability of the active detection and verification function.

[0055] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A welding device for producing sofa iron frames with an auxiliary positioning structure, comprising a welding workbench, a welding robot, and a clamping mechanism for fixing a metal pipe (202) and a metal plate (201) in a sofa leg (002), characterized in that: The invention also includes an auxiliary distance measurement mechanism (001) and an auxiliary analysis system, wherein the auxiliary distance measurement mechanism (001) includes a plurality of distance measurement components, wherein the distance measurement components include a support box (101) embedded in a welding workbench, wherein the top end of the support box (101) is configured to be open, wherein an electric push rod (102) is fixedly installed in the support box (101), wherein the output end of the electric push rod (102) is fixedly connected to a connecting plate (103), wherein a distance sensor (104) is fixedly installed on the connecting plate (103), and wherein the height of the distance sensor (104) is located between the upper surface and the lower surface of the metal plate (201) fixed by the clamp mechanism; The auxiliary analysis system includes a parameter input module, an automatic modeling module, a coordinate generation module, a model mapping module, a data generation module, an analysis and judgment module, and a measurement control module; The parameter input module is used to input parameters, the automatic modeling module is used to automatically generate a 3D model, the coordinate generation module is used to construct a Cartesian coordinate system, the model mapping module is used to map the 3D model to the Cartesian coordinate system, the data generation module is used to generate theoretical measurement values, the analysis and judgment module is used to judge whether the positioning between the metal pipe (202) and the metal plate (201) is accurate based on the theoretical measurement values ​​and the actual measurement values ​​measured by the distance sensor (104), the measurement control module is signal-connected to the electric push rod (102) and the distance sensor (104), and the distance sensor (104) is signal-connected to the analysis and judgment module.

2. A welding device for sofa iron frame production with an auxiliary positioning structure according to claim 1, characterized in that: The size parameters of the sofa legs (002) are input through the parameter input module, and the automatic modeling module automatically generates a corresponding 3D model according to the size parameters of the sofa legs (002). A point is selected on the welding workbench as a reference point, and the coordinate generation module constructs a Cartesian coordinate system with the reference point as the origin. The position parameters between each distance sensor (104) and the reference point and the measurement direction information of the distance sensor (104) are input through the parameter input module. The coordinate generation module generates sensor coordinates for each distance sensor (104) according to the position parameters and marks the corresponding measurement direction.

3. The welding device for sofa iron frame production with an auxiliary positioning structure according to claim 2, characterized in that: After the metal plate (201) is fixed by the clamp mechanism, a vertex is selected on the metal plate (201) as a mapping point, and a position parameter between the mapping point and the reference point is input through a parameter input module. The model mapping module maps the 3D model of the sofa leg (002) to a Cartesian coordinate system according to the position parameter, and an elevation parameter is input through a parameter module. The data generation module generates a theoretical measurement value according to the sensor coordinates in the Cartesian coordinate system and the 3D model.

4. The welding device for sofa iron frame production with an auxiliary positioning structure according to claim 3 is characterized in that: The theoretical measurement value includes two types: a distance plate theoretical measurement value and a distance control measurement value. The distance plate theoretical measurement value is the straight-line distance between the sensor coordinates along the corresponding distance sensor (104) measurement direction and the 3D model. The distance control measurement value is generated by increasing the sensor coordinates along the Z-axis direction by a corresponding value according to the elevation parameter, and then generating the straight-line distance between the sensor coordinates along the corresponding measurement direction and the 3D model.

5. The welding device for sofa iron frame production with an auxiliary positioning structure according to claim 4, characterized in that: The tolerance parameters are input through the parameter input module. The auxiliary analysis system also includes a deviation alarm module. The analysis and judgment logic of the analysis and judgment module is as follows: After the metal plate (201) and the metal pipe (202) are fixed by the clamp mechanism, the measurement control module controls the distance sensor (104) to measure the distance between the distance sensor and the metal plate (201) to obtain a measured distance value; The analysis and judgment module compares the actual distance plate value with the corresponding theoretical distance plate value. When the deviation between all the actual distance plate values ​​and the corresponding theoretical distance plate values ​​is not greater than the tolerance parameter, it is determined that the metal plate (201) is accurately positioned. When the deviation between at least one actual distance plate value and the corresponding theoretical distance plate value is greater than the tolerance parameter, it is determined that there is a deviation in the positioning of the metal plate (201). The analysis and judgment module controls the deviation alarm module to issue an alarm. The measurement control module controls the electric push rod (102) to drive the distance sensor (104) to move upward by a corresponding distance according to the lifting parameter, and then controls the distance sensor (104) to measure the distance between it and the metal pipe (202) to obtain a measured value of the distance to the pipe; The analysis and judgment module compares the actual distance measurement value to the pipe with the corresponding distance measurement value. When the deviation between all the actual distance measurement values ​​and the corresponding distance measurement values ​​is not greater than the tolerance parameter, it is determined that the positioning between the metal plate (201) and the metal pipe (202) is accurate. When the deviation between at least one actual distance measurement value and the corresponding distance measurement value is greater than the tolerance parameter, it is determined that the positioning between the metal plate (201) and the metal pipe (202) is inaccurate, and the analysis and judgment module controls the deviation alarm module to issue an alarm.

6. The welding device for sofa iron frame production with an auxiliary positioning structure according to claim 5, characterized in that: The auxiliary analysis system also includes a number management module, which is used to create sofa leg numbers with unique identifiers and bind corresponding configuration parameters, wherein the configuration parameters include size parameters, position parameters, elevation parameters, and tolerance parameters.

7. The welding device for sofa iron frame production with an auxiliary positioning structure according to claim 6, characterized in that: The auxiliary determination and analysis system also includes a number parameter storage module, which is used to store sofa leg numbers and corresponding configuration parameters.

8. The welding device for sofa iron frame production with an auxiliary positioning structure according to claim 7, characterized in that: The auxiliary analysis system also includes a number calling module, which is used to read the corresponding configuration parameters from the number parameter storage module according to the sofa leg number selected by the user, and automatically load them into the parameter input module.

9. The welding device for sofa iron frame production with an auxiliary positioning structure according to claim 1, characterized in that: A lower positioning plate (105) is also fixedly installed in the support box (101), and the lower positioning plate (105) is located below the connecting plate (103), and the top end of the lower positioning plate (105) abuts against the bottom end of the connecting plate (103).

10. The welding device for sofa iron frame production with an auxiliary positioning structure according to claim 3, characterized in that: A vertical plate (106) is fixedly installed on the top of the support box (101), and an upper positioning plate (107) is fixedly connected to one side of the vertical plate (106) close to the connecting plate (103). The upper positioning plate (107) is located above the connecting plate (103), and the vertical distance between the upper positioning plate (107) and the connecting plate (103) is equal to the lifting parameter.

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