Automatic electric arc welding device for box-shaped steel component machining

Abstract

The application discloses a kind of automatic electric arc welding devices for box type steel member processing, it is related to electric arc welding technical field, including box plate positioning rotation system, electric arc welding robot system and general control system;Box plate positioning rotation system includes a pair of coaxial rotating support, a pair of respectively being connected between two rotating supports and can be along its radial synchronous and moving towards or away from each other support frame, and symmetrically arranged in two support frame opposite sides two ends, for from end clamping first box plate's gripper.The application takes general control system as core, coordinates the time sequence action of box plate positioning rotation system and electric arc welding robot system, automatically completes box plate clamping, spacing adjustment, attitude switching, assembly positioning, weld welding and unloading reset etc. whole process operation, need not manual intervention core process, effectively reduce labor intensity, integrate traditional multi-process, multi-station processing mode into integrated process, substantially shorten production cycle, improve batch production efficiency.

Description

Technical Field

[0001] This invention relates to the field of welding technology, specifically to the field of automated arc welding technology, and more specifically to an automated arc welding device for processing box-shaped steel components. Background Technology

[0002] Box-type steel components, as a type of steel structural component welded from multiple steel plates, have a rectangular or square cross-section. Due to their large cross-sectional area, high bending stiffness, strong load-bearing capacity, and the ability to add reinforcing structures such as transverse diaphragms inside, they have become key components in core scenarios such as high-rise building columns and heavy machinery supports. Their processing precision directly determines the structural stability and safe service life of the end product.

[0003] In the processing of box-type steel components, the assembly and welding of multiple steel plates after they are wound into a ring-shaped box is the core process. The core technical difficulty of this process lies in the precise control of the verticality of the steel plates, the efficient adaptation of the production process, and the accessibility of welding the circumferential welds.

[0004] Currently, box-shaped steel components are generally welded on a jig. However, there are still many prominent problems in the assembly and welding process: Firstly, the traditional processing mode relies on manual welding of four steel plates. During the welding process, the steel plates are easily affected by welding stress and thermal deformation, causing them to shift. Operators need to manually correct the perpendicularity between the steel plates in real time. This is not only extremely labor-intensive, but also has limited manual adjustment accuracy, making it difficult to maintain the regular shape of the box in the long term. It is also very easy for skew defects to occur, resulting in the finished product's dimensional accuracy and mechanical properties not meeting the standards, making it unsuitable for high-end scenarios with strict requirements for component precision. Secondly, although some existing equipment (such as the box-type steel structure docking and assembly processing equipment with publication number CN114406590A) can achieve steel plate fixing and vertical positioning, the welding operation position is fixed and mostly adopts fixed-point welding mode. When welding the bottom plate of the box-type steel, due to the obstruction of the box structure itself and the limitation of operating space, it is difficult for the welding gun to reach into the bottom plate weld area, or the welding field of vision is severely obstructed, which makes it impossible to achieve continuous and stable welding of the bottom plate weld. Only segmented spot welding or manual overhead welding can be used to supplement it. Not only is the weld formation quality poor and defects such as incomplete penetration and porosity easy to occur, but it also greatly increases the labor intensity and safety risks. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic arc welding device for processing box-shaped steel components, so as to solve the problems mentioned in the background art.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: The present invention provides an automatic arc welding device for processing box-type steel components, including a box plate positioning and rotation system, an arc welding robot system and a central control system; The box panel positioning and rotation system includes a pair of coaxially arranged rotating support members, a pair of support frames respectively connected between the two rotating support members and capable of moving synchronously towards or away from each other in their radial direction, and clamps symmetrically arranged at both ends of the two support frames on opposite sides for clamping the first box panel from the end; the clamps form a support surface at the end of the support frame in the width direction, and when the first box panel is clamped and fixed, one end of its width direction extends out of the support surface by a preset distance. The arc welding robot system is located next to the box plate positioning and rotation system and is used to move along the length of the first box plate and perform welding operations. The overall control system establishes communication connections with the box plate positioning and rotation system and the arc welding robot system to coordinate their timing actions and control the fully automated operation of the box-type steel components from box plate clamping, positioning, assembly to welding.

[0007] Furthermore, the rotating support includes a support base, a rotating shaft, a rotating disk, and a first rotating power output component; the rotating shaft is rotatably mounted in the shaft hole of the support base via a bearing assembly, the rotating disk is welded to one end of the rotating shaft, and the first rotating power output component is connected to the other end of the rotating shaft via a connecting flange.

[0008] Furthermore, the rotating disk is symmetrically provided with through slots extending radially therein, and a sliding seat is slidably installed in each through slot. The two ends of the support frame are respectively fixedly connected to the corresponding sliding seats on the two rotating disks. The rotating disk is provided with a first lead screw drive assembly on the side near the center of the rotating shaft. The first lead screw drive assembly includes a support plate, a first bidirectional lead screw, and a second rotary power output component. The support plate is symmetrically fixed to the rotating disk. The first bidirectional lead screw is rotatably assembled between the support plates through bearings. The first bidirectional lead screw has two sections of threads with opposite directions of rotation. The two sections of threads of the first bidirectional lead screw respectively form a threaded engagement with the internal thread holes of the two sliding seats. The second rotary power output component is connected to the end of the first bidirectional lead screw for transmission.

[0009] Furthermore, the clamp includes a sliding part and an L-shaped insertion part; the sliding part is slidably assembled to the support frame and can only move along the length of the frame; the L-shaped insertion part is detachably connected to the sliding part, and the L-shaped insertion part and the side of the support frame enclose each other to form a movable U-shaped groove.

[0010] Furthermore, the support frame is provided with a second lead screw drive assembly, which includes a second bidirectional lead screw arranged along the length of the support frame and a third rotary power output component; the second bidirectional lead screw is rotatably connected to the support frame through a bearing, and the second bidirectional lead screw is machined with two sections of threads with opposite directions of rotation, and the sliding parts of the two clamps respectively form a threaded engagement with the two sections of threads of the second bidirectional lead screw; the third rotary power output component is used to drive the second bidirectional lead screw to rotate.

[0011] Furthermore, a reinforcing right-angled triangular block is provided between the inner sides of the L-shaped connector.

[0012] Furthermore, the arc welding robot system includes a multi-axis articulated welding robot, a robot ground rail, an integrated welding torch, and a laser vision sensor; the base of the multi-axis articulated welding robot is fixed to the robot ground rail, the integrated welding torch is connected to the robot end flange through a quick-change device, and the laser vision sensor is installed at the robot end.

[0013] Furthermore, the overall control system adopts a combination architecture of PLC controller and industrial touch screen, which supports the visual setting of welding current, voltage and welding speed parameters, and can monitor equipment status and weld quality data in real time.

[0014] Furthermore, the support frame is made of high-strength aluminum alloy profiles and undergoes aging treatment to eliminate internal stress.

[0015] Furthermore, the rotating support and the drive mechanism of the support frame are both equipped with position encoders, and the overall control system corrects motion parameters through a closed-loop control algorithm; the device is also equipped with a dual safety protection system consisting of a safety light curtain and an emergency stop button.

[0016] Compared with existing technologies, one or more of the above technical solutions have the following beneficial effects: 1. This invention uses a central control system as its core to coordinate the timing actions of the box plate positioning and rotation system and the arc welding robot system. It automatically completes the entire process of box plate clamping, spacing adjustment, posture switching, assembly positioning, weld welding, and unloading and resetting without the need for manual intervention in core processes. This effectively reduces labor intensity and integrates the traditional multi-process, multi-station processing mode into an integrated process, significantly shortening the production cycle and improving batch production efficiency.

[0017] 2. The rotating support and the drive mechanism of the support frame of this invention are both equipped with position encoders. Combined with the closed-loop control algorithm of the overall control system, the spacing adjustment accuracy of the support frame is controlled within ±0.1mm, and the rotation attitude switching error does not exceed 0.5°. The clamp compensates for the thickness deviation of the box plate through the self-centering wedge mechanism. With the real-time tracking function of the weld seam of the laser vision sensor, it ensures that the gap between the box plates is uniform and the weld seam path is accurate. This effectively avoids welding defects caused by human operation errors and improves the weld seam forming quality and the overall mechanical properties of the component.

[0018] 3. The support frame of this invention can move synchronously along the radial direction of the rotating support member, and the clamp can adjust the spacing along the length of the support frame. The L-shaped plug part can be adapted to the first box plate, the second box plate, and the third box plate with different widths, lengths, and thicknesses. At the same time, the rotating support member supports switching between horizontal and vertical clamping postures, and is compatible with both ground machinery and hoisting equipment for feeding. It can process box-shaped steel components of different specifications and under different working conditions without changing special clamps, which significantly improves the versatility and flexibility of the equipment.

[0019] 4. The rotating support component of this invention adopts an integrated structure of servo motor and planetary reducer, combined with pre-tightened and adjusted bearing assembly, which can withstand compound loads and overturning moments, ensuring smooth posture changes; the support frame is made of high-strength aluminum alloy profiles spliced ​​together and aged, taking into account both lightweight and deformation resistance, avoiding the impact of frame deformation on accuracy during processing; the reinforced right-angled triangular block design of the clamp not only improves structural rigidity, but also achieves self-adaptive clamping, ensuring that the box plate is stable and does not loosen during welding, thus guaranteeing the stability of the welding process and the long-term reliability of the equipment.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0021] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view structural diagram of the present invention; Figure 3 yes Figure 1 A schematic diagram of the partial structure at point A; Figure 4 yes Figure 1 A schematic diagram of the local structure at point B; Figure 5 This is a schematic diagram of the welding first state structure of the present invention; Figure 6 This is a schematic diagram of the welding second state structure of the present invention; Figure 7 This is a schematic diagram of the welding third state structure of the present invention; Figure 8 This is a schematic diagram of the fourth welding state structure of the present invention.

[0023] In the picture: 1-Box plate positioning and rotation system; 11-Rotating support; 111-Support seat; 112-Rotating shaft; 1121-Through slot; 113-Rotating disk; 114-First rotating power output component; 12-Supporting frame; 13-Clamping device; 131-Sliding part; 132-L-shaped insertion part; 133-U-shaped slot; 134-Reinforced right-angled triangular block; 14-Supporting surface; 15-First lead screw drive assembly; 151-Sliding seat; 152-Supporting plate; 153-First bidirectional lead screw; 154-Second rotating power output component; 16-Second lead screw drive assembly; 161-Second bidirectional lead screw; 162-Third rotating power output component; 2-Arc welding robot system; 21-Multi-axis articulated welding robot; 22-Robot ground rail; 23-Integrated welding torch; 3-General control system. Detailed Implementation

[0024] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0025] Please see Figures 1-8 This invention provides an automatic arc welding device for processing box-type steel components, including a box plate positioning and rotation system 1, an arc welding robot system 2, and a central control system 3. The box plate positioning and rotation system 1 includes a pair of coaxially arranged rotating support members 11, a pair of support frames 12 respectively connected between the two rotating support members 11 and capable of moving synchronously towards or away from each other along their radial directions, and clamps 13 symmetrically arranged at opposite ends of the two support frames 12 for clamping a first box plate from its ends. Each clamp 13 has a support surface 14 formed at the end of the support frame 12 in the width direction; when the first box plate is clamped and fixed, one end of the clamp extends beyond the support surface 14 by a predetermined distance. The arc welding robot system 2 is located beside the box plate positioning and rotation system 1 and is used to move along the length direction of the first box plate and perform welding operations. The central control system 3 is communicatively connected to the box plate positioning and rotation system 1 and the arc welding robot system 2 to control the entire welding process.

[0026] This device uses the central control system 3 as its core control hub to coordinate the timing actions of the box-type steel component positioning and rotation system 1 and the arc welding robot system 2, thereby achieving fully automated operation of the box-type steel component from box clamping, positioning, assembly to welding. To facilitate the explanation of the specific operation process, the box-type steel component welded by this device is composed of two first box plates, one second box plate, and one third box plate, and the inner side of the second box plate is pre-welded with evenly distributed reinforcing vertical plates.

[0027] The specific operating procedure is as follows: The central control system 3 first outputs a posture adjustment command to the rotating support 11 according to the type of on-site material feeding equipment; if ground machinery such as forklifts or roller conveyors are used for material feeding, the rotating support 11 drives the support frame 12 to rotate to a horizontally distributed position, so that the lower support frame 12 is close to the working surface, making it easier for the ground equipment to smoothly push the first box plate from the side to the clamping area of ​​the clamper 13 (reference). Figure 5 (as shown); if a bridge crane, electric hoist or other hoisting equipment is used for loading, the rotating support 11 drives the support frame 12 to rotate to a vertical posture with left and right distribution, so that the support frame 12 is in a vertical suspended state, which makes it convenient for the hoisting equipment to accurately lift the first box plate from above to the position of the clamp 13, adapting to the loading requirements of different working conditions and improving the clamping flexibility (not shown).

[0028] After the first panel is moved to the preset position of the clamp 13, the main control system 3 sends a clamping command to the clamp 13. The clamp 13 then firmly clamps the two first panels to the opposite sides of the two support frames 12 from the ends. After clamping, one end of the first panel extends beyond the support surface 14 of the clamp 13 by a preset distance. This preset distance is exactly the same as the thickness of the second panel and can be calibrated by the operator using measuring equipment to reserve a reference gap for the subsequent bonding and assembly of the second panel (see reference). Figure 6 (As shown).

[0029] Subsequently, the central control system 3 sends a displacement command to the drive mechanism of the support frame 12 according to the preset specification parameters (such as width) of the box-shaped steel component to be processed, driving a pair of support frames 12 to move synchronously towards or away from each other along the radial direction of the rotating support 11, adjusting the distance between the two first box plates so that it is completely matched with the width of the second box plate and the third box plate, thus meeting the processing adaptation requirements of different types of box-shaped steel components.

[0030] After the spacing between the first box panels is adjusted to the correct position, the main control system 3 outputs a posture switching command to the rotating support 11, driving the support frame 12 to rotate to a vertical posture with left and right distribution, ensuring that a wide assembly space is formed between the first box panels. Subsequently, the main control system 3, in conjunction with the external hoisting and loading equipment, moves the second box panel between the two first box panels. At this time, the two side edges of the second box panel directly overlap the support surfaces 14 of the four clamps 13, and the parts of the first box panels extending beyond the support surfaces 14 are tightly fitted with the sides of the second box panel, naturally forming an assembly gap with uniform width and regular position (see reference). Figure 7 As shown in the figure), once the second box plate is assembled in place, the main control system 3 immediately sends a welding command to the arc welding robot system 2, driving the arc welding robot to move at a constant speed along the length of the first box plate, and simultaneously starting the welding program to perform continuous and stable automated welding of the two longitudinal welds between the first and second box plates.

[0031] After the weld between the second and first box plates is completed, the main control system 3 controls the arc welding robot to return to the initial working position and pause the welding action; then, it sends a rotation command to the rotating support 11, driving the support frame 12 to rotate the first and second box plates, which have been welded and fixed, synchronously by 180°, rotating the unassembled side to the working area of ​​the arc welding robot, providing convenient operating space for the assembly of the third box plate; after rotating into place, the main control system 3 immediately controls the arc welding robot to move to the preset welding point position, and performs spot welding to fix it along the edge of the reinforcing vertical plate and the first box plate, ensuring the stability of the reinforcing vertical plate position.

[0032] After the reinforcing vertical plates are fixed, the external hoisting and loading equipment moves the third box panel between the two first box panels. Since the inner side of the second box panel has evenly distributed reinforcing vertical plates welded on it, the third box panel can be positioned by simply overlapping the upper surface of the reinforcing vertical plates, and the two sides of the third box panel form a new assembly gap with the inner sides of the two first box panels (see reference). Figure 8 (As shown); after the main control system 3 detects that the third box plate is assembled in place through the sensor, it restarts the arc welding robot and controls it to move at a constant speed along the length of the first box plate to automatically weld the two longitudinal welds between the third box plate and the first box plate, thus completing the enclosing welding of the box-shaped steel component.

[0033] After all welds are completed, the central control system 3 controls the arc welding robot to stop welding and return to its original position; at the same time, it sends a release command to the gripper 13, the clamping mechanism of the gripper 13 resets, and the clamping and fixing of the first box plate is released. The operator or automatic unloading equipment removes the formed box-shaped steel component from the device to complete the unloading; then, the central control system 3 controls the support frame 12 to move radially along the rotating support 11 to the initial spacing, the rotating support 11 drives the support frame 12 back to the default clamping preparation posture (such as horizontal posture), and the entire device returns to the initial working state, waiting for the processing of the next batch of box plates, realizing continuous cycle operation.

[0034] In this embodiment, the rotating support 11 serves as the core drive and load-bearing unit of the box plate positioning and rotating system 1, and is the key to ensuring that the workpiece achieves precise and stable posture changes during the welding process. The rotating support 11 uses a support base 111, which is stably installed on the equipment foundation or rigid frame, as a static foundation to provide a stable reference for the entire rotational movement. A rotating shaft 112 is rotatably mounted in the shaft hole of the support base 111 through a bearing assembly. The bearing assembly is pre-tightened and adjusted to withstand the radial and axial combined loads and overturning moments from the workpiece and the support frame 12. A rotating disk 113 is welded to one end of the rotating shaft 112, and the other end of the rotating shaft 112 is connected to a first rotating power output component 114 through a connecting flange. The first rotating power output component 114 adopts an integrated structure of servo motor and planetary reducer. The servo motor directly receives instructions from the central control system 3 and amplifies the output torque through the built-in reducer to drive the rotating shaft 112 to perform precise angular rotation, thereby enabling the support frame 12 to quickly switch between preset postures such as horizontal and vertical, adapting to different working conditions such as hoisting or loading onto ground equipment. At the same time, it can control the workpiece assembly to complete a precise 180° rotation during the welding process, providing the best working position for multi-face welding.

[0035] In this embodiment, in order to achieve radial synchronous movement of the support frame 12 to adjust the workpiece spacing, symmetrical through slots 1121 extending radially are provided on the rotating disks 113 on both sides of the rotating shaft 112. Each through slot 1121 is slidably installed with a sliding seat 151. The two ends of the support frame 12 are respectively fixedly connected to the corresponding sliding seats 151 on the two rotating disks 113, so that the linear movement of the sliding seat 151 is directly converted into the synchronous opening and closing of the support frame 12. Based on this design, a first lead screw drive assembly 15 is provided on the side of the rotary disk 113 near the center of the rotating shaft 112. The first lead screw drive assembly 15 includes a support plate 152 symmetrically fixed on the rotary disk 113, a first bidirectional lead screw 153 rotatably assembled between the support plates 152 via bearings, and a second rotary power output component 154 that is drively connected to the end of the first bidirectional lead screw 153. The first bidirectional lead screw 153 is machined with two sections of threads with opposite directions of rotation. The two sections of threads of the first bidirectional lead screw 153 respectively form a threaded engagement with the internal threaded holes of the two sliding seats 151. When the second rotary power output component 154 receives the displacement command from the main control system 3, it drives the first bidirectional lead screw 153 to rotate. With the help of the characteristics of the bidirectional lead screw, the two sliding seats 151 move synchronously and in opposite directions along the through groove 1121, accurately driving the support frame 12 and the workpiece clamped on it to adjust to the predetermined distance.

[0036] In this embodiment, the clamp 13 is a key component for achieving precise end clamping and positioning of the first box plate, and its design takes into account both the requirements of firm clamping and precise position adjustment. Each clamp 13 includes a sliding part 131 and an L-shaped insertion part 132. The sliding part 131 is slidably mounted on the support frame 12 via a guide rail or slider mechanism and can move along the length of the frame. The L-shaped insertion part 132 and the sliding part 131 are detachably connected by bolts or quick-change interfaces. After the two are combined, the L-shaped insertion part 132 and the side of the support frame 12 can together form a movable U-shaped groove 133, in which the end of the first box plate is accommodated and clamped within the U-shaped groove 133.

[0037] In this embodiment, to accommodate the clamping requirements of first box plates of different lengths, a second lead screw drive assembly 16 is provided on the support frame 12. The second lead screw drive assembly 16 includes a second bidirectional lead screw 161 arranged along the length direction of the support frame 12 and rotatably connected to the frame via bearings, and a third rotary power output component 162 for driving the lead screw to rotate. The second bidirectional lead screw 161 is machined with two sections of threads with opposite directions of rotation. The sliding parts 131 of the two clamps 13 respectively form a threaded engagement with the two sections of reverse threads of the second bidirectional lead screw 161. When the third rotary power output component 162 receives a command from the central control system 3, it drives the second bidirectional lead screw 161 to rotate. Utilizing the mechanical characteristics of the bidirectional thread, the sliding parts 131 of the two clamps 13 are forced to make precise reverse linear movements along the support frame 12, symmetrically adjusting the relative distance of the clamps 13 to achieve stable clamping of the first box plate.

[0038] In this embodiment, to ensure structural rigidity while adapting to precise clamping of first box plates of different thicknesses, a reinforcing right-angled triangular block 134 is provided on the inner side of the L-shaped insertion part 132. The reinforcing right-angled triangular block 134 not only provides bending and torsional rigidity for the L-shaped insertion part 132, but its inclined surface can also make contact with the end face of the first box plate when the clamping device 13 performs the clamping action. As the clamping force is continuously applied, a pair of inclined surfaces form a self-centering wedge mechanism, which, according to the actual thickness of the box plate and in coordination with the support frame 12, forms a clamping force in the length and thickness directions of the first box plate, automatically compensating for the deviation of the first box plate in the thickness direction, and ensuring that no matter what difference there is in the thickness of the box plate, a stable clamping can be achieved through the linear contact of the inclined surfaces.

[0039] In this embodiment, the arc welding robot system 2 includes a multi-axis articulated welding robot 21, a robot ground rail 22, an integrated welding torch 23, and a laser vision sensor. The arc welding robot system 2 uses a multi-axis articulated welding robot 21 as its core actuator. Its base is fixed on a robot ground rail 22 arranged along the welding station. The ground rail gives the robot the freedom of movement along the length of the first box plate, enabling continuous one-time welding of long welds without the need for segmentation or repositioning. The end flange of the multi-axis articulated welding robot 21 is connected to an integrated welding torch 23 via a quick-change device. The integrated welding torch 23 integrates contact sensing, gas protection, and arc monitoring functions. A torch cleaning and wire trimming mechanism is compactly arranged on the side. It is triggered by the central control system 3 at regular intervals or according to a program to automatically remove welding spatter and trim welding wire, ensuring continuous stability of the welding process and weld formation quality. A laser vision sensor is installed at the end of the multi-axis articulated welding robot 21 for initial weld positioning and real-time tracking of the welding process. Before welding begins, the bevel formed by assembly is scanned, and the actual gap and misalignment data are fed back to the central control system 3. The system then fine-tunes the robot's welding path and parameters to achieve adaptive welding.

[0040] In this embodiment, the central control system 3 adopts a combination architecture of PLC controller and industrial touch screen, which supports the visual setting of parameters such as welding current, voltage, and welding speed. At the same time, it monitors the equipment status and weld quality data in the operation process in real time, which makes it easier for operators to quickly adjust parameters and troubleshoot faults, thereby improving equipment operation and maintenance efficiency.

[0041] In this embodiment, the support frame 12 is made of high-strength aluminum alloy profiles and is subjected to aging treatment to eliminate internal stress. Its structural design ensures lightweight while greatly improving the resistance to deformation. It can stably support the assembly and welding of large-span and thick box-shaped steel components and avoid the deformation of the support frame affecting the accuracy of the weld.

[0042] In this embodiment, the device is equipped with a dual safety protection system (not shown) consisting of a safety light curtain and an emergency stop button. When an operator accidentally enters the work area or the equipment malfunctions, the trigger signal of the safety light curtain or the emergency stop command will be transmitted to the main control system 3 in real time. The system will immediately trigger a shutdown command, cut off the welding power and the drive mechanism power, and ensure the safety of personnel and equipment.

[0043] In this embodiment, the drive mechanisms of the rotating support 11 and the support frame 12 are both equipped with position encoders to collect displacement and angle data in real time and feed them back to the main control system 3. The main control system 3 corrects the motion parameters through a closed-loop control algorithm so that the spacing adjustment accuracy of the support frame 12 is controlled within ±0.1mm and the rotation posture switching error does not exceed 0.5°, ensuring the high precision requirements of the box assembly and welding.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic arc welding device for processing box-shaped steel components, characterized in that, This includes a box plate positioning and rotation system, an arc welding robot system, and a central control system; The box panel positioning and rotation system includes a pair of coaxially arranged rotating support members, a pair of support frames respectively connected between the two rotating support members and capable of moving synchronously towards or away from each other in their radial direction, and clamps symmetrically arranged at both ends of the two support frames on opposite sides for clamping the first box panel from the end; the clamps form a support surface at the end of the support frame in the width direction, and when the first box panel is clamped and fixed, one end of its width direction extends out of the support surface by a preset distance. The arc welding robot system is located next to the box plate positioning and rotation system and is used to move along the length of the first box plate and perform welding operations. The overall control system establishes communication connections with the box plate positioning and rotation system and the arc welding robot system to coordinate their timing actions and control the fully automated operation of the box-type steel components from box plate clamping, positioning, assembly to welding.

2. The automatic arc welding device for processing box-shaped steel components according to claim 1, characterized in that, The rotating support includes a support base, a rotating shaft, a rotating disk, and a first rotating power output component; the rotating shaft is rotatably mounted in the shaft hole of the support base via a bearing assembly, the rotating disk is welded to one end of the rotating shaft, and the first rotating power output component is connected to the other end of the rotating shaft via a connecting flange.

3. The automatic arc welding device for processing box-shaped steel components according to claim 2, characterized in that, The rotating disk has symmetrical through slots extending radially therein, and a sliding seat is slidably installed in each through slot. The two ends of the support frame are respectively fixedly connected to the corresponding sliding seats on the two rotating disks. The rotating disk is provided with a first lead screw drive assembly on the side near the center of the rotating shaft. The first lead screw drive assembly includes a support plate, a first bidirectional lead screw, and a second rotary power output component. The support plate is symmetrically fixed to the rotating disk. The first bidirectional lead screw is rotatably assembled between the support plates through bearings. The first bidirectional lead screw has two sections of threads with opposite directions of rotation. The two sections of threads of the first bidirectional lead screw respectively form a threaded engagement with the internal thread holes of the two sliding seats. The second rotary power output component is connected to the end of the first bidirectional lead screw for transmission.

4. The automatic arc welding device for processing box-shaped steel components according to claim 1, characterized in that, The clamp includes a sliding part and an L-shaped insertion part; the sliding part is slidably assembled to the support frame and can only move along the length of the frame; the L-shaped insertion part is detachably connected to the sliding part, and the L-shaped insertion part and the side of the support frame together form a movable U-shaped groove.

5. The automatic arc welding device for processing box-shaped steel components according to claim 4, characterized in that, The support frame is provided with a second lead screw drive assembly, which includes a second bidirectional lead screw arranged along the length of the support frame and a third rotary power output component. The second bidirectional lead screw is rotatably connected to the support frame through a bearing, and two sections of threads with opposite directions are machined on the second bidirectional lead screw. The sliding parts of the two clamps respectively form a threaded engagement with the two sections of threads of the second bidirectional lead screw. The third rotary power output component is used to drive the second bidirectional lead screw to rotate.

6. The automatic arc welding device for processing box-shaped steel components according to claim 4, characterized in that, A reinforcing right-angled triangular block is provided between the inner sides of the L-shaped connector.

7. The automatic arc welding device for processing box-shaped steel components according to claim 1, characterized in that, The arc welding robot system includes a multi-axis articulated welding robot, a robot ground rail, an integrated welding torch, and a laser vision sensor; the base of the multi-axis articulated welding robot is fixed to the robot ground rail, the integrated welding torch is connected to the robot end flange through a quick-change device, and the laser vision sensor is installed at the robot end.

8. The automatic arc welding device for processing box-shaped steel components according to claim 1, characterized in that, The overall control system adopts a combination architecture of PLC controller and industrial touch screen, which supports the visual setting of welding current, voltage and welding speed parameters, and can monitor equipment status and weld quality data in real time.

9. The automatic arc welding device for processing box-shaped steel components according to claim 1, characterized in that, The support frame is made of high-strength aluminum alloy profiles and undergoes aging treatment to eliminate internal stress.

10. The automatic arc welding device for processing box-shaped steel components according to claim 1, characterized in that, The rotating support and the drive mechanism of the support frame are both equipped with position encoders. The overall control system corrects motion parameters through a closed-loop control algorithm. The device is also equipped with a dual safety protection system consisting of a safety light curtain and an emergency stop button.

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