Plasma welding mechanism for steel structure

Abstract

The invention relates to the technical field of welding mechanisms, in particular to a plasma welding mechanism for a steel structure. The plasma welding mechanism for the steel structure comprises a welding machine, a clamping assembly and a limiting assembly. The welding machine comprises a welding gun and an adjusting mechanism, and the adjusting mechanism is in transmission connection with the welding gun and used for adjusting the height of the welding gun. The clamping assembly comprises a rotating frame, a first motor and a rotating shaft, and the rotating frame is provided with a plurality of workpiece bearing faces to be matched with workpieces of different shapes. The first motor is in driving connection with the rotating shaft and drives the rotating shaft to rotate; the rotating shaft is connected to the rotating frame and used for driving the rotating frame to rotate so that the multiple workpiece bearing faces can alternately face the welding gun. The rotating frame is provided with a plurality of limited assemblies used for positioning one borne face. The limiting assembly is matched with the limited assembly so as to fix the rotating frame. According to the invention, the problem of displacement caused by vibration or control deviation of the rotary clamping structure in the welding mechanism is solved.

Description

Technical Field

[0001] The invention relates to the technical field of welding mechanisms, and in particular to a plasma welding mechanism for steel structures. Background Art

[0002] With the continuous development of industrial welding technology, the rotating clamping structure is one of the key components for achieving precise welding in welding equipment. Existing clamping mechanisms usually use motor drive or pneumatic control to adjust the clamping position to meet the welding requirements of different types of workpieces. However, in the actual production process, due to factors such as mechanical vibration during equipment operation, insufficient motor control accuracy, or transmission system gaps, the clamping structure is prone to micro-displacement during the changeover or welding process, resulting in workpiece positioning deviation, which in turn affects the welding quality. Especially in high-precision welding or automated assembly line operations, such problems may cause welding position offset, uneven welds, and even cause the workpiece to be scrapped, increasing production costs.

[0003] In the prior art, common solutions include optimizing the motor servo control algorithm, enhancing the rigidity of the mechanical structure, or using high-precision sensor feedback correction, but these methods are often costly or increase the system complexity, and it is difficult to completely eliminate the cumulative deviation caused by vibration and transmission error. Therefore, there is an urgent need for a limit assembly with a simple structure and high reliability that can effectively constrain the clamping structure during the changeover or welding process and prevent displacement caused by vibration or control deviation, thereby improving the welding positioning accuracy and process stability. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, an object of the present invention is to provide a plasma welding mechanism for steel structures to solve the problem of displacement of a rotating clamping structure in the welding mechanism due to vibration or control deviation.

[0005] The purpose of the present invention is achieved by the following technical solutions:

[0006] A plasma welding mechanism for steel structure, comprising:

[0007] A welding machine, the welding machine comprising a welding gun and an adjusting mechanism, the adjusting assembly being drivingly connected to the welding gun for adjusting the height of the welding gun;

[0008] A clamping assembly, wherein the clamping assembly comprises a rotating frame, a first motor and a rotating shaft, wherein the rotating frame is provided with a plurality of workpiece bearing surfaces, and the shapes of the plurality of workpiece bearing surfaces are different so as to respectively adapt to workpieces of different shapes; the first motor is drivingly connected to the rotating shaft, and the first motor is used to drive the rotating shaft to rotate; the rotating shaft is connected to the rotating frame, and is used to drive the rotating frame to rotate, so that the plurality of workpiece bearing surfaces are rotated toward the welding gun; the rotating frame is provided with a plurality of limited assemblies, and the plurality of limited assemblies are sequentially and spacedly distributed around the rotating direction of the rotating frame, so as to respectively position one of the bearing surfaces;

[0009] The limiting assembly includes a linear drive mechanism, a supporting device and a positioning rod, wherein the positioning rod is adapted to the limited assembly; the linear drive mechanism is mounted on the supporting device and is drivingly connected to the positioning rod, thereby being able to drive the positioning rod to approach and abut against the limited assembly, and being able to drive the positioning rod away to disengage from the limiting assembly.

[0010] Furthermore, the linear drive mechanism includes a second motor, a turbine and a screw, the second motor is installed on the supporting device, the second motor, the turbine and the screw are sequentially connected in transmission so that the screw can reciprocate along the axial direction of the screw, and the screw is coaxially connected to the positioning rod.

[0011] Furthermore, the lead screw extends along the direction of gravity.

[0012] Furthermore, at least two of the limited components are correspondingly configured on each of the workpiece bearing surfaces;

[0013] The two limited components that jointly locate the same workpiece bearing surface are symmetrically distributed about the axis of the rotating shaft.

[0014] Furthermore, the limited component includes a first cylindrical cylinder and a second cylindrical cylinder, the second cylindrical cylinder is coaxially nested in the first cylindrical cylinder, and the outer diameter of the second cylindrical cylinder is smaller than the inner diameter of the first cylindrical cylinder, and a limiting structure is provided between the first cylindrical cylinder and the second cylindrical cylinder, and the limiting structure limits the vertical relative movement between the two; the positioning rod can be inserted into the second cylindrical cylinder.

[0015] Furthermore, the limiting structure is a bolt, which is threadedly connected to the side wall of the first cylindrical tube and presses against the second cylindrical tube.

[0016] Furthermore, the positioning rod is a hollow structure to form a wire channel.

[0017] Furthermore, a pressure sensor is provided in the positioning rod, and the pressure sensor is connected to the electrical signal of the second motor through a signal line, so that the second motor is stopped after the limiting assembly of the positioning rod is in place, and the signal line is passed through the wire channel of the positioning rod.

[0018] Furthermore, there is a spare limiting component, which is arranged in the horizontal direction. The limited components in the horizontal direction all serve as spare limited components. The spare limiting component cooperates with the spare limited components to assist in positioning the rotating frame.

[0019] Furthermore, the positioning rod is detachably connected to the screw rod.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Based on the adjustable height welding gun of the welding machine, the welding machine can flexibly adjust the distance between the welding gun and the workpiece, significantly improving the welding accuracy and adaptability, especially for welding workpieces of different thicknesses or complex shapes. Its height adjustment function can optimize arc stability and weld depth, reduce spatter and weld defects, thereby improving welding quality; at the same time, the operator does not need to frequently change the welding gun or adjust the tooling, which greatly reduces labor intensity and improves efficiency. In addition, the design can also adapt to automated welding scenarios, adjust the height through real-time feedback, ensure process consistency, extend the service life of the welding gun, reduce energy consumption and material waste, and comprehensively improve production economy and safety.

[0022] 2. The rotating frame based on the clamping assembly has multiple different workpiece bearing surfaces, which can adapt to workpieces of different shapes and switch the workpiece bearing surfaces through the connection of the first motor. This design not only reduces the tedious operation of traditional fixture replacement, significantly shortens the changeover time, and improves processing efficiency, but also ensures accurate positioning of the workpiece, enhances processing stability, reduces clamping errors, and improves product consistency. In addition, the automatic switching function reduces manual intervention and can be seamlessly connected with robots or CNC systems to meet the needs of intelligent production. It is suitable for multi-variety, small-batch manufacturing scenarios, thereby optimizing the production line layout, reducing overall costs and improving market response speed.

[0023] 3. Based on the cooperation between the limiting component and the limited component to fix the rotating frame, the rotating frame can be quickly locked when it switches to the target workpiece bearing surface, ensuring absolute stability during the processing. This design provides reliable positioning through mechanical interlocking, effectively preventing the rotating frame from switching the workpiece bearing surface out of place or offsetting or vibrating during processing, thereby ensuring high-precision processing requirements; at the same time, its rapid locking and release characteristics not only improve the efficiency of the bearing surface switching, but also avoid the cumbersome operation of traditional bolt fixing, significantly improving the automation level of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a plasma welding mechanism for steel structure of the present invention;

[0025] Figure 2 for Figure 1 The schematic diagram of the limit assembly shown;

[0026] In the figure: 1. welding machine; 101. welding gun; 102. adjusting mechanism; 2. clamping assembly; 201. rotating frame; 202. first motor; 203. rotating shaft; 3. workpiece bearing surface; 4. limited assembly; 401. first cylindrical barrel; 402. second cylindrical barrel; 5. limiting assembly; 501. linear drive mechanism; 502. supporting device; 503. positioning rod; 511. second motor; 512. turbine; 513. screw; 6. limiting structure; 7. pressure sensor; 8. spare limiting assembly; 9. spare limited assembly. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element, or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element, or there may be an element centered thereon. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0029] Unless otherwise defined, all technical terms and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0030] See also Figure 1-Figure 2A plasma welding machine 1 for steel structure according to a preferred embodiment of the present invention comprises a welding machine 1, a clamping assembly 2 and a limiting assembly 5. The welding machine 1 comprises a welding gun 101 and an adjusting mechanism 102, wherein the adjusting assembly is drivingly connected to the welding gun 101 for adjusting the height of the welding gun 101; the clamping assembly comprises a rotating frame 201, a first motor 202 and a rotating shaft 203, wherein the rotating frame 201 is provided with a plurality of workpiece bearing surfaces 3, and the shapes of the plurality of workpiece bearing surfaces 3 are different so as to respectively adapt to workpieces of different shapes; the first motor 202 is drivingly connected to the rotating shaft 203, and the first motor 202 is used to drive the rotating shaft 203 to rotate; the rotating shaft 203 is connected to the rotating frame 201, and is used to drive the rotating frame 201 to rotate so that the plurality of workpiece bearing surfaces 3 rotate. Towards the welding gun 101; the rotating frame 201 is provided with a plurality of limited components 4, and the plurality of limited components 4 are distributed in sequence and at intervals around the rotation direction of the rotating frame 201, so as to be respectively used to position one of the bearing surfaces; the limiting component 5 includes a linear drive mechanism 501, a supporting device 502 and a positioning rod 503, and the positioning rod 503 is adapted to the limited component 4; the linear drive mechanism 501 is installed on the supporting device 502, and is drivingly connected to the positioning rod 503, so that the positioning rod 503 can be driven to approach and abut the limited component 4, and can be driven to move the positioning rod 503 away to disengage from the limiting component 5.

[0031] The welding machine 1 is connected to the welding gun 101 by a transmission mechanism 102, and the height of the welding gun 101 can be accurately adjusted to meet the welding requirements of different workpieces. The rotating frame 201 on the clamping assembly 2 is provided with a plurality of workpiece bearing surfaces 3 of different shapes, which can be respectively adapted to workpieces of different shapes, such as H\channel steel, I-beam\triangle steel, T-shaped steel, etc. The first motor 202 drives the rotating shaft 203 to rotate, thereby driving the rotating frame 201 to rotate, and then decelerates through the reduction box to ensure that the workpiece bearing surface 3 will not cause angular deviation due to excessive rotation of inertia. Different workpiece bearing surfaces 3 can be turned toward the welding gun 101 in turn, so as to realize the required workpiece rapid switching. In order to ensure the welding accuracy, a plurality of surrounding limited components 4 are provided on the rotating frame 201, and each limited component 4 corresponds to a workpiece bearing surface 3. The limiting component 5 controls the linear lifting and lowering motion of the positioning rod 503 through a linear drive mechanism 501 (such as a cylinder or an electric push rod) (it can be understood that in an alternative manner, the linear motion may be an inclined or horizontal linear motion). When the rotating frame 201 rotates to the target position, the linear drive mechanism 501 pushes the positioning rod 503 down to make it abut against the corresponding limited component 4 (such as a positioning hole or groove), thereby locking the position of the rotating frame 201 to ensure stability during welding. After welding is completed, the linear drive mechanism 501 drives the positioning rod 503 to retract, release the limit, and allow the rotating frame 201 to continue to place the next workpiece to be welded or rotate to switch to the workpiece bearing surface 3 of the next shape.

[0032] Based on the adjustable height welding gun 101 of the welding machine 1, the welding machine 1 significantly improves the welding accuracy and adaptability by flexibly adjusting the distance between the welding gun 101 and the workpiece, and is particularly suitable for welding workpieces of different thicknesses or complex shapes. Its height adjustment function can optimize arc stability and weld depth, reduce spatter and weld defects, and thus improve welding quality; and the operator does not need to frequently replace the welding gun 101 or adjust its position, which greatly reduces labor intensity and improves processing efficiency. Of course, this design can also adapt to automated welding scenarios, adjust the height through real-time feedback, ensure process consistency, extend the service life of the welding gun 101, reduce energy consumption and material waste, and comprehensively improve production economy and safety.

[0033] The rotating frame 201 based on the clamping assembly 2 has multiple different workpiece bearing surfaces 3, which can adapt to workpieces of different shapes and switch the workpiece bearing surfaces 3 through the connection of the first motor 202. This design not only reduces the cumbersome operation of traditional fixture replacement, significantly shortens the changeover time, and improves processing efficiency, but also ensures accurate positioning of the workpiece, enhances processing stability, reduces clamping errors, and improves product consistency. In addition, the automatic switching function reduces manual intervention and can also seamlessly connect with robots or CNC systems to meet the needs of intelligent production. It is suitable for multi-variety, small-batch manufacturing scenarios, thereby optimizing production line layout, reducing overall costs and improving market response speed.

[0034] Based on the cooperation between the limiting component 5 and the limited component 4 to position the rotating frame 201, the rotating frame 201 can be quickly locked when it switches to the target workpiece bearing surface 3, ensuring absolute stability during the processing. This design provides reliable positioning through mechanical interlocking, effectively preventing the rotating frame 201 from switching the workpiece bearing surface 3 out of position or from offsetting or vibrating during processing, thereby ensuring high-precision processing requirements; and its fast locking and release characteristics not only improve the efficiency of the bearing surface switching, but also avoid the cumbersome operation of traditional bolt fixing, significantly improving the automation level of the equipment.

[0035] Since the welding gun 101 will degrade in performance due to high temperature accumulation during long-term continuous welding operations, and is prone to deformation, insulation aging, or burning of key components, etc., the control component can be efficiently integrated with components such as air cooling, water cooling, or heat dissipation fans, which can effectively prevent the welding gun 101 from overheating, thereby increasing its service life. At the same time, a temperature sensor is added to monitor the temperature of the welding gun 101 in real time. When the heat dissipation component cannot cool the welding gun 101 in time and the temperature of the welding gun 101 reaches the preset value of the temperature sensor, the control system will stop the welding machine 1 from operating.

[0036] In order to further ensure the continuity of production, a single welding gun 101 can be replaced with a welding gun disk structure. The welding gun disk adopts a rotatable design and integrates multiple welding gun 101 units, and cooperates with the temperature monitoring system to realize intelligent switching. When a welding gun 101 triggers shutdown protection due to high temperature, the control system automatically rotates the welding gun disk, switches the spare welding gun 101 to the working position, and starts the heat dissipation program to force cooling of the high-temperature welding gun 101. This design completely eliminates production interruptions through the rotation mechanism of multiple welding guns 101 to ensure the continuous progress of welding operations; its modular structure is not only convenient for rapid replacement and maintenance, but also can select different models of welding guns 101 according to different process requirements, significantly improving the flexibility of the equipment. Combined with the aforementioned heat dissipation and temperature control technology, the system will increase the service life of the welding gun 101 while achieving production continuity. It is especially suitable for high-intensity continuous operation scenarios such as automobile manufacturing and pipeline welding, greatly reducing the comprehensive operation and maintenance costs and improving production capacity stability.

[0037] The clamping assembly 2 is adapted to the welding requirements of steel structures of different shapes. The rotating frame 201 thereon is provided with a plurality of workpiece bearing surfaces 3. In order to prevent the welding material from shifting after being placed in place, resulting in insufficient welding precision, anti-skid patterns or micro-protrusion structures are provided on each bearing surface, which effectively increases the friction resistance between the workpiece and the bearing surface, and prevents displacement caused by vibration or force during welding. At the same time, the anti-skid structure adopts wear-resistant alloy or ceramic coating, which not only maintains the anti-skid performance in long-term use, but also does not damage the workpiece surface. The first motor 202 connected to the rotating shaft 203 can adopt a servo motor or a stepper motor to make the control more precise and further reduce the angle error of switching the workpiece bearing surface 3.

[0038] At the same time, it is also necessary to ensure that the rotating frame 201 will not be displaced due to vibration or control deviation during operation, and on this basis, a limit component 5 is added. The positioning rod 503 in the limit component 5 can not only be automatically matched with the limited component 4 by the linear drive mechanism 501, but can also be manually fine-tuned by the manual adjustment mechanism 102, taking into account both automated production and flexible operation under special working conditions. This electromechanical limit design ensures the stability of the rotating frame 201 during high-speed operation and retains the convenience of manual intervention; its self-locking structure can still maintain a mechanical locking state in the event of a power outage, effectively preventing accidental displacement.

[0039] Furthermore, the linear drive mechanism 501 needs to be easy to install and control. Preferably, the linear drive mechanism 501 includes a second motor 511, a turbine 512 and a lead screw 513. The second motor 511 is installed on the support device 502. The second motor 511, the turbine 512 and the lead screw 513 are sequentially connected in transmission so that the lead screw can reciprocate along the axial direction of the lead screw. The lead screw is coaxially connected to the positioning rod 503. The second motor 511 and the first motor 202 establish a real-time data exchange channel through the industrial bus to achieve two-way closed-loop feedback control. That is, when the first motor 202 switches the workpiece bearing surface 3, the angular position information of the rotating frame 201 is transmitted to the control system of the second motor 511 in real time; the second motor 511 dynamically adjusts the extension amount of the positioning rod 503 according to the received angle data. If the second motor 511 controls the positioning rod 503 to extend but fails to cooperate with the adapted component, it will be fed back to the first motor 202, the clamping component 2 and the limit component 5 will be initialized, the first motor 202 will readjust the control torque, and the second motor 511 will try to control the positioning rod 503 to match the adapted component again. If the matching fails again, it will switch to manual mode and stop the equipment operation, triggering the alarm system.

[0040] Furthermore, in order to simplify the linear drive mechanism 501 and ensure that the device does not accidentally touch the limit assembly 5 when placed in a steel structure that needs to be welded, preferably, the lead screw extends along the direction of gravity. This design allows the second motor 511, the turbine 512, the lead screw 513 and the positioning rod 503 to be on the same axis, forming a vertically arranged compact drive unit while centrally arranging the moving parts on the non-operating side of the device, leaving an unobstructed operating space for workpiece loading and unloading. The lead screw 513 and the positioning rod 503 can also be connected using bearings. When the second motor 511 drives the lead screw 513 to press down, the bearing keeps the positioning rod 503 stationary to avoid rotational contact with the limited assembly 4.

[0041] The linear drive mechanism 501 can also be replaced by an electric push rod, which not only greatly simplifies the transmission structure, reduces the combination of multiple components such as the turbine 512 and the screw rod 513, reduces the assembly difficulty and manufacturing cost of the equipment, but also can achieve rapid installation and maintenance through the plug-and-play characteristics of the electric push rod; the precise linear motion control ability of the electric push rod ensures the stable positioning of the limit assembly 5, avoids the precision loss caused by the complex transmission chain, and effectively prevents the steel structure from accidentally colliding with the limit assembly 5 during the placement process. If further cost reduction is required, the linear drive mechanism 501 can be replaced by a cylinder drive, which has a faster response speed than the electric drive, can achieve instantaneous rapid action, can greatly shorten the time for steel structure positioning and limiting, and improve the production rhythm. At the same time, the structure of the cylinder is simpler and more compact, and is not susceptible to electromagnetic interference, and can still operate stably in the complex electromagnetic environment generated by welding operations. In addition, using a cylinder as a power source has a low maintenance cost, and only requires regular inspection of the gas source and seals, without the need for complex circuit detection and maintenance like electric equipment. Compressed air is a clean energy source and does not produce pollutants during use. It not only meets environmental protection requirements but also reduces the company's energy consumption costs. This allows the equipment to be both economical and environmentally friendly while ensuring efficient operation of welded steel structures.

[0042] Furthermore, in order to ensure that the positioning rod 503 is subjected to uniform force, preferably, at least two of the limited components 4 are configured corresponding to each of the workpiece bearing surfaces 3; the two limited components 4 that jointly position the same workpiece bearing surface 3 are symmetrically distributed about the axis of the rotating shaft 203. Through this symmetrical layout design, when the workpiece is placed on the bearing surface, the two limited components 4 can simultaneously apply a restraining force from a symmetrical direction, so that the external force on the positioning rod 503 is evenly dispersed, effectively avoiding the phenomenon of local stress concentration. When the rotating frame 201 is subjected to an eccentric load, it can still maintain a uniform clamping force distribution, effectively eliminating the bending and fracture of the positioning rod 503 caused by unilateral stress concentration. This structural design can not only significantly improve the structural stability and service life of the positioning rod 503, reduce the risk of wear and deformation caused by uneven force, but also ensure the accuracy of workpiece positioning, avoid position deviation caused by unbalanced force, and thus improve the product quality and production efficiency of the entire processing or assembly process.

[0043] In order to make the positioned component better adapt to the positioning rod 503, preferably, the limited component 4 includes a first cylindrical barrel 401 and a second cylindrical barrel 402, the second cylindrical barrel 402 is coaxially nested in the first cylindrical barrel 401, and the outer diameter of the second cylindrical barrel 402 is smaller than the inner diameter of the first cylindrical barrel 401, and a limiting structure 6 is provided between the first cylindrical barrel 401 and the second cylindrical barrel 402, and the limiting structure 6 limits the vertical relative movement between the two; the positioning rod 503 can be inserted into the second cylindrical barrel 402. When the positioning rod 503 is inserted into the second cylindrical barrel 402, the inner wall of the second cylindrical barrel 402 forms a tight fit with the positioning rod 503 to ensure radial positioning accuracy, and the first cylindrical barrel 401, as an external supporting structure, prevents the second cylindrical barrel 402 from being offset or loosened in the vertical direction through the limiting structure 6, thereby maintaining the coaxiality while enhancing the stability of the overall structure.

[0044] Preferably, the limiting structure 6 between the first cylindrical tube 401 and the second cylindrical tube 402 is a bolt, which is threadedly connected to the side wall of the first cylindrical tube 401 and squeezed against the second cylindrical tube 402. This structure allows the axial position of the second cylindrical tube 402 to be fine-tuned during assembly to ensure the precise insertion of the positioning rod 503; and the bolt connection method is convenient for disassembly and maintenance. If the second cylindrical tube 402 is worn due to long-term use, or the positioning rod 503 is accidentally broken into the second cylindrical tube 402, the bolt can be loosened for replacement or re-centering without the need for overall replacement, thereby reducing the cost of use; in addition, the preload of the bolt can be adjusted according to the actual working conditions, which can not only ensure sufficient constraint strength, but also avoid deformation of the second cylindrical tube 402 due to excessive clamping force, thereby taking into account both structural rigidity and assembly flexibility. This limiting method is particularly suitable for occasions that require regular adjustment or vibration loads, which not only improves positioning reliability, but also enhances the maintainability of the system.

[0045] When the rotating frame 201 deviates and the positioning assembly stops moving, a violent rigid collision occurs between the positioning rod 503 and the rotating frame 201. Preferably, the positioning rod 503 is a hollow structure to form a wire channel. The hollow structure reduces the overall weight of the positioning rod 503, reduces the inertial impact force, and improves the dynamic response capability of the system. In the event of an accidental collision, the plastic deformation or fracture of the hollow rod body can play a buffering role in protecting the rotating frame 201. Compared with a solid structure, it can better protect the transmission components, reduce the degree of damage after the collision with the rotating frame 201, and extend the service life of the equipment. This design also provides convenient space for the subsequent installation of sensors or signal lines, enhances the scalability of the system, and is suitable for automation scenarios with high precision or frequent adjustments.

[0046] Based on the wire channel formed by the positioning hollow structure, preferably, a pressure sensor 7 is provided in the positioning rod 503, and the pressure sensor 7 is electrically connected to the second motor 511 through a signal line, so that the second motor 511 is stopped after the positioning assembly 5 of the positioning rod 503 is in place, and the signal line is passed through the wire channel of the positioning rod 503. When the positioning rod 503 is plugged into the second cylindrical barrel 402, the pressure sensor 7 therein contacts the bottom of the second cylindrical barrel 402, and when subjected to the preset pressure, a stop signal is given to the motor to achieve precise positioning. The wire channel formed by the hollow positioning rod 503 protects the signal line, avoids external interference or mechanical wear, and ensures stable signal transmission. The structure is compact and reasonable, and no additional wiring space is required, which not only maintains the neatness of the equipment, but also facilitates maintenance and upgrading.

[0047] Furthermore, in order to ensure the stability of the equipment operation and prevent the limit component 5 from being unusable after a collision, preferably, the equipment also has a spare limit component 8, which is arranged in the horizontal direction, and the limited components 4 in the horizontal direction are all used as spare limited components 9, and the spare limit component 8 cooperates with the spare limited component 9 to assist in positioning the rotating frame 201. The spare limit component 8 can be automatically switched when the limit component 5 is damaged. The double limit system greatly improves the fault tolerance of the equipment and avoids the shutdown of the whole machine due to a single point failure. The triggering of the backup system does not require manual intervention, and can achieve automatic switching, minimizing unexpected downtime; in addition, the design extends the service life of the main limit component 5 through a load sharing mechanism and reduces the overall maintenance frequency. This innovative dual protection scheme is particularly suitable for high-load conditions of continuous operation, and provides double insurance for equipment reliability while ensuring positioning accuracy.

[0048] In order to improve maintenance efficiency and facilitate replacement of damaged positioning rods 503, preferably, the positioning rods 503 and the screw rods 513 are detachably connected. The modular design greatly shortens maintenance time, and the positioning rods 503 can be replaced separately without disassembling the entire machine; the standardized interface reduces the spare parts inventory cost, and different models of equipment can use the same connection structure; precise positioning and matching ensures coaxiality during repeated assembly, avoiding the impact of disassembly and assembly on equipment accuracy; in addition, this design also facilitates the replacement of positioning rods 503 of different materials according to working conditions, improving system adaptability.

[0049] The file storage auxiliary device of the present invention has but is not limited to the following technical effects:

[0050] 1. Advantages of height adjustment of welding machine 1: welding machine 1 is connected to welding gun 101 through adjusting mechanism 102, and the height of welding gun 101 can be flexibly adjusted. This design improves welding accuracy and adaptability, optimizes arc stability and weld depth, reduces spatter and weld defects, and improves welding quality. At the same time, it reduces labor intensity, improves processing efficiency, adapts to automated welding scenarios, ensures process consistency, extends the service life of welding gun 101, reduces energy consumption and material waste, and improves production economy and safety.

[0051] 2. Advantages of the clamping assembly 2: The rotating frame 201 of the clamping assembly 2 is provided with a plurality of workpiece bearing surfaces 3 of different shapes, and the first motor 202 drives the rotating shaft 203 to rotate to realize the switching of the bearing surfaces. This design reduces the cumbersome operation of replacing traditional fixtures, shortens the changeover time, improves processing efficiency, ensures accurate positioning of the workpiece, enhances processing stability, reduces clamping errors, and improves product consistency. In addition, the automatic switching function can be connected with a robot or CNC system to meet the needs of intelligent production, optimize the production line layout, reduce the overall cost and improve the market response speed.

[0052] 3. Advantages of the limiting component 5: The limiting component 5 and the limited component 4 cooperate to fix the rotating frame 201, and can be quickly locked when the rotating frame 201 switches to the target workpiece bearing surface 3 to ensure the stability of the processing process. Reliable positioning is provided through mechanical interlocking to prevent the rotating frame 201 from switching out of position, offset or vibration, and ensure high-precision processing requirements. The rapid locking and release characteristics improve the efficiency of the bearing surface switching, avoid the cumbersome operation of traditional bolt fixing, and improve the degree of equipment automation.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A plasma welding mechanism for steel structure, characterized in that: include: A welding machine (1), the welding machine (1) comprising a welding gun (101) and an adjustment mechanism (102), the adjustment assembly being in driving connection with the welding gun (101) for adjusting the height of the welding gun (101); A clamping assembly (2), the clamping assembly comprising a rotating frame (201), a first motor (202) and a rotating shaft (203), the rotating frame (201) being provided with a plurality of workpiece bearing surfaces (3), the plurality of workpiece bearing surfaces (3) having different shapes so as to respectively adapt to workpieces of different shapes; the first motor (202) being drivingly connected to the rotating shaft (203), the first motor (202) being used to drive the rotating shaft (203) to rotate; the rotating shaft (203) being connected to the rotating frame (201) and being used to drive the rotating frame (201) to rotate so that the plurality of workpiece bearing surfaces (3) are rotated toward the welding gun (101); the rotating frame (201) being provided with a plurality of limited assemblies (4), the plurality of limited assemblies (4) being sequentially spaced and distributed around the rotating direction of the rotating frame (201) so as to respectively be used to position one of the bearing surfaces; A limiting component (5), the limiting component (5) comprising a linear drive mechanism (501), a supporting device (502) and a positioning rod (503), the positioning rod (503) being adapted to the limited component (4); the linear drive mechanism (501) is mounted on the supporting device (502) and is drivingly connected to the positioning rod (503), thereby being able to drive the positioning rod (503) to approach and abut against the limited component (4), and being able to drive the positioning rod (503) away to disengage from the limiting component (5).

2. A plasma welding mechanism for steel structure according to claim 1, characterized in that: The linear drive mechanism (501) comprises a second motor (511), a turbine (512) and a lead screw (513); the second motor (511) is mounted on the support device (502); the second motor (511), the turbine (512) and the lead screw (513) are sequentially connected in a transmission manner so that the lead screw can reciprocate along the axial direction of the lead screw; the lead screw is coaxially connected to the positioning rod (503).

3. A plasma welding mechanism for steel structure according to claim 2, characterized in that: The lead screw extends along the direction of gravity.

4. The plasma welding mechanism for steel structure according to claim 1, characterized in that: Each of the workpiece bearing surfaces (3) is correspondingly configured with at least two of the limited components (4); The two limited components (4) that are co-positioned on the same workpiece bearing surface (3) are symmetrically distributed about the axis of the rotating shaft (203).

5. The plasma welding mechanism for steel structure according to claim 1, characterized in that: The limited component (4) includes a first cylindrical cylinder (401) and a second cylindrical cylinder (402), wherein the second cylindrical cylinder (402) is coaxially nested in the first cylindrical cylinder (401), and the outer diameter of the second cylindrical cylinder (402) is smaller than the inner diameter of the first cylindrical cylinder (401), and a limiting structure (6) is provided between the first cylindrical cylinder (401) and the second cylindrical cylinder (402), wherein the limiting structure (6) limits vertical relative movement between the two; the positioning rod (503) can be inserted into the second cylindrical cylinder (402).

6. A plasma welding mechanism for steel structure according to claim 5, characterized in that: The limiting structure (6) is a bolt, which is threadedly connected to the side wall of the first cylindrical tube (401) and abuts against the second cylindrical tube (402) in a pressing manner.

7. The plasma welding mechanism for steel structure according to claim 1, characterized in that: The positioning rod (503) is a hollow structure to form a wire channel.

8. The plasma welding mechanism for steel structure according to claim 7, characterized in that: A pressure sensor (7) is provided inside the positioning rod (503), and the pressure sensor (7) is electrically connected to the second motor (511) via a signal line so that the second motor (511) is stopped after the limit assembly (5) of the positioning rod (503) is in place, and the signal line is passed through the wire channel of the positioning rod (503).

9. The plasma welding mechanism for steel structure according to claim 1, characterized in that: It also has a spare limiting component (8), which is arranged in the horizontal direction. The limited components (4) in the horizontal direction all serve as spare limited components (9). The spare limiting component (8) cooperates with the spare limited components (9) to assist in positioning the rotating frame (201).

10. The plasma welding mechanism for steel structure according to claim 1, characterized in that: The positioning rod (503) is detachably connected to the screw rod (513).

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