Dual gun welding apparatus

Abstract

This invention relates to a dual-welding-torch welding device, comprising: a movable base; a worktable disposed on the movable base and movable along a direction parallel to the length of the workpiece to be welded; a welding execution mechanism, which is a six-degree-of-freedom robot, with a dual-welding-torch assembly at its end for distributing on opposite sides of the workpiece and aligning with the weld seam during welding; and a positioning and correction mechanism that moves synchronously with the worktable, including a position adjustment component and a clamping and correction component; the position adjustment component includes a first drive component, a first mounting base, and a first rolling contact portion, and the clamping and correction component includes a second drive component, a second mounting base, and a second rolling contact portion. The two rolling contact portions clamp on opposite sides of the workpiece and continuously abut and roll as the device moves along the length of the workpiece, so as to apply a lateral correction force to the workpiece that is dynamically deformed due to the welding heat input while welding, thereby maintaining straightness and positional stability in real time and providing a stable working basis for the continuous and accurate alignment of the two welding torches.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and in particular to a dual-welding-gun welding device. Background Technology

[0002] In heavy steel structure manufacturing, welding long strip reinforcing ribs such as spherical flat steel and angle steel to panel steel is a key process for improving structural performance. The core challenge of this process is the workpiece deformation caused by welding thermal stress, which seriously impairs the straightness and dimensional accuracy of the components. Traditional methods for preventing deformation, such as rigid fixing, anti-deformation pre-setting, and manual symmetrical welding, generally suffer from drawbacks such as cumbersome operation, reliance on experience, low efficiency, or unstable quality.

[0003] With the popularization of automated welding, welding robots are widely used, but existing processes still face fundamental contradictions: The bottleneck of single-gun welding efficiency: Its unidirectional and sequential operation method is not only inefficient, but also inevitably leads to severe asymmetrical deformation (such as panel wavy deformation, workpiece angular deformation, and longitudinal bending) due to the high concentration of heat on one side. To control deformation, welding speed often needs to be sacrificed or cumbersome straightening processes need to be added. Moreover, single-sided welding at irregular cross-sections of bulb flat steel is prone to defects such as incomplete penetration, making it difficult to guarantee consistent quality.

[0004] Obstacles to the application of double-sided synchronous welding: Theoretically, using two welding torches to simultaneously weld on both sides of a workpiece is an ideal solution for balancing heat input, improving efficiency, and ensuring penetration. However, the workpiece to be welded must maintain extremely high straightness and positional stability throughout the welding process. In actual production, long and narrow workpieces are constantly in a state of dynamic deformation due to clamping errors and welding thermal cycles. Any slight deviation of the workpiece will directly lead to misalignment of the two welding torches, causing welding defects or even equipment interference. This makes the requirements for tooling accuracy, assembly consistency, and control complexity of the double welding torch system extremely stringent, resulting in high costs, poor adaptability, and difficulty in practical application in most production scenarios. Summary of the Invention

[0005] Therefore, it is necessary to provide a dual-welding gun welding device that can actively maintain the straightness of the workpiece during the welding process, thereby creating a stable and reliable operating foundation for the dual welding guns, in order to address the above problems.

[0006] The present invention provides a dual-welding-gun welding device, comprising: Mobile base; The worktable is mounted on the movable base and can reciprocate along a direction parallel to the length of the workpiece to be welded; A welding actuator is set on the workbench, and its end is provided with a double welding gun head assembly. The double welding gun head assembly includes two welding gun heads whose spacing and angle can be adjusted independently, so that they are distributed on opposite sides of the workpiece to be welded and aligned with the weld seam during welding. A positioning and correction mechanism is disposed on the worktable and can move synchronously with the worktable, including a position adjustment component and a clamping and correction component; the position adjustment component includes a first driving member, a first mounting base driven by the first driving member to move linearly, and a first rolling contact portion mounted on the first mounting base; the clamping and correction component includes a second driving member, a second mounting base driven by the second driving member to move linearly, and a second rolling contact portion mounted on the second mounting base. The first and second driving components drive the first and second rolling contact parts to clamp the first and second rolling contact parts on opposite sides of the workpiece to be welded in front of the dual welding gun assembly. During synchronous movement along the length of the workpiece, they continuously roll and abut against each other. This allows the dual welding gun assembly to apply a lateral correction force to the workpiece, which is dynamically deformed due to the welding heat input, while welding, so as to maintain its straightness and positional stability in real time. This provides a stable working basis for the continuous and accurate alignment of the two welding guns.

[0007] In one embodiment, the dual welding torch assembly further includes a mounting bracket and two symmetrically arranged slides, with the two welding torches respectively mounted on the corresponding slides; the mounting bracket is provided with guide rails and a drive unit corresponding to the two slides respectively, and the drive unit drives the slides to move linearly along the guide rails to independently adjust the distance between the two welding torches.

[0008] In one embodiment, a rotation drive is further provided between the slide and the corresponding welding torch head, and the welding torch head is driven to rotate around at least one axis by the rotation drive to independently adjust its welding angle.

[0009] In one embodiment, the movable base includes a chassis and a slide fixedly mounted on the chassis, the worktable being reciprocally mounted on the slide via a sliding assembly.

[0010] In one embodiment, the sliding assembly includes a slide rail disposed on the slide table and a slider disposed on the bottom of the worktable and cooperating with the slide rail.

[0011] In one embodiment, the movable base further includes a linear drive assembly for driving the worktable to move. The linear drive assembly includes a rack disposed on the slide, a servo motor disposed on the worktable, and a gear driven by the servo motor and meshing with the rack.

[0012] In one embodiment, the rack and gear are helical.

[0013] In one embodiment, the position adjustment assembly further includes a first support arm and a first guide shaft. The first support arm is fixed to the worktable, one end of the first guide shaft passes through the first support arm, and the other end is connected to the first mounting base. The first driving component is a first telescopic cylinder, the body of which is fixed to the first support arm, and its output shaft is connected to the first mounting base.

[0014] In one embodiment, the clamping and correction assembly further includes a second support arm and a second guide shaft. The second support arm is fixed to the first mounting base, one end of the second guide shaft passes through the second support arm, and the other end is connected to the second mounting base. The second driving component is a second telescopic cylinder, the body of which is fixed to the second support arm, and its output shaft is connected to the second mounting base.

[0015] In one embodiment, the first telescopic cylinder and the second telescopic cylinder are electric cylinders.

[0016] In one embodiment, the position adjustment assembly further includes a positioning element, which includes a positioning shaft fixed to the first mounting base or the second support arm, and a first rolling contact portion mounted on the end of the positioning shaft.

[0017] In one embodiment, the clamping and correction assembly further includes a correction section, which includes a correction shaft fixed to the second mounting base and a second rolling contact section mounted on the end of the correction shaft.

[0018] In one embodiment, the first rolling contact portion and the second rolling contact portion are bearing-type rollers.

[0019] In one embodiment, the position adjustment assembly further includes a pressure holder disposed on the second support arm for applying pressure from the top of the workpiece to be welded.

[0020] In one embodiment, the pressing member includes a support, an adjustable adjusting screw mounted on the second support arm, and a roller mounted on the support.

[0021] The aforementioned dual-welding-torch welding device effectively solves the core technical problem of misalignment of the dual welding torches caused by dynamic deformation of the workpiece by integrating a dual welding torch head assembly with independently adjustable spacing and angle, and a positioning and correction mechanism that can move synchronously with the welding process and actively apply force. Specifically, the positioning and correction mechanism clamps the workpiece on both sides and continuously rolls against it before the welding of the dual welding torch head assembly through its first and second rolling contact parts. The drive component actively controls the application of a lateral correction force to the workpiece, thereby maintaining the straightness and positional stability of the workpiece in real time during the dynamic process of deformation caused by welding heat input. This provides the necessary and stable physical basis for the continuous and accurate spatial alignment of the two welding torch heads in the dual welding torch head assembly along the entire weld seam. Based on this, the dual welding gun assembly can perform synchronous symmetrical welding on both sides of the workpiece, which not only significantly improves welding efficiency, but more importantly, it fundamentally suppresses asymmetrical welding deformation by balancing heat input, while ensuring the penetration quality and consistency of the weld. This allows the efficient and high-quality process of double-sided synchronous welding to be implemented stably and reliably in the welding of long strip workpieces, reducing the dependence on the initial assembly accuracy of the workpiece and complex rigid tooling. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a dual-welding-gun welding device according to one embodiment; Figure 2 for Figure 1 A magnified view of part A in the middle; Figure 3 for Figure 1 Another structural schematic diagram of the dual welding gun welding device in the embodiment; Figure 4 for Figure 3 A magnified view of part B in the middle; Figure 5 This is a schematic diagram of the positioning and correction mechanism. Figure 6 for Figure 3 A magnified view of part C in the middle; Figure 7 This is a schematic diagram of the positioning and correction mechanism from another angle.

[0024] Figure label: 100. Movable base; 110. Chassis; 120. Slide table; 122. Slide rail; 124. Rack; 130. Worktable; 132. Slider; 134. Servo motor; 140. Positioning and correction mechanism; 141. Second support arm; 142. First support arm; 143. Second drive component; 144. First drive component; 145. Second guide shaft; 146. First guide shaft; 147. Second mounting base; 148. First mounting base; 149. Second rolling contact part; 342. Holding component; 344. First rolling contact part; 150. Welding actuator; 151. Drive unit; 152. Mounting bracket; 154. Slide; 156. Guide rail; 158. Welding torch head; 50. Workpiece to be welded; 60. Welding base plate. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this specification are for illustrative purposes only and do not represent the only possible implementation.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0030] The following is combined Figures 1-7 The present invention describes a dual-welding-gun welding apparatus.

[0031] like Figures 1 to 7 As shown, in one embodiment, a dual-welding-gun welding apparatus includes a movable base 100, a worktable 130, a positioning and correction mechanism 140, and a welding execution mechanism 150.

[0032] The worktable 130 is mounted on the movable base 100 and can reciprocate along a direction parallel to the length of the workpiece to be welded, carrying the welding actuator 150 and the positioning and correction mechanism 140 in synchronous motion. The welding actuator 150 is preferably a six-degree-of-freedom robot mounted on the worktable 130, with a dual welding torch assembly at its end. The dual welding torch assembly includes two welding torches 158 whose spacing and angle can be independently adjusted, so that they are distributed on opposite sides of the workpiece 50 to be welded and aligned with the weld seam (the parallel weld seam on both sides of the workpiece) during welding. This assembly is the core actuator for implementing double-sided synchronous welding. The dual welding torch assembly also includes a mounting bracket 152 and two symmetrically arranged slides 154. The mounting bracket 152 is fixedly connected to the robot's end flange, and the two welding torches 158 are respectively mounted on their corresponding slides 154. The mounting bracket 152 is provided with guide rails 156 corresponding to the two slides 154 and a drive unit 151 (such as a servo motor with a lead screw). The drive unit 151 drives the slides 154 to move linearly along the guide rails 156 to independently adjust the distance between the two welding torches 158. A rotation drive is also provided between the slides 154 and the corresponding welding torches 158. The rotation drive drives the welding torches 158 to rotate around at least one axis to independently adjust their welding angle to adapt to workpieces of different widths or cross-sectional shapes and maintain the optimal welding posture.

[0033] The positioning and correction mechanism 140 is mounted on the worktable 130 and moves synchronously with it. It is located in front of the welding execution mechanism 150 along the direction of movement (i.e., it contacts the workpiece before the welding torch). While welding is in progress, it performs real-time and active lateral position correction and constraint on the workpiece, which is undergoing dynamic deformation due to heat, providing a stable and accurate working reference for the dual welding torch heads behind it. The positioning and correction mechanism 140 includes a position adjustment component and a clamping and correction component. The position adjustment component includes a first drive member 144, a first mounting base 148 driven by the first drive member 144 to move linearly, and a first rolling contact portion 344 mounted on the first mounting base 148. The clamping and correction component includes a second drive member 143, a second mounting base 147 driven by the second drive member 143 to move linearly, and a second rolling contact portion 149 mounted on the second mounting base 147. Through the drive of the first drive member 144 and the second drive member 143, the first rolling contact portion 344 and the second rolling contact portion 149 can be clamped on opposite sides of the workpiece 50 to be welded, and continuously abut and roll as they move along the length direction of the workpiece 50 to be welded, so as to apply a corrective force to the workpiece to be welded in front of the welding execution mechanism 150 during the welding process to maintain its straightness, thereby so that the workpiece 50 to be welded is welded in a straight line onto the welding base plate 60 (such as panel steel). An optional positioning and correction mechanism 140 is fixedly connected to one side of the worktable 130 and extends into the welding work area. Its extension direction is perpendicular to the slide table 120 on the movable base 100. The positioning and correction mechanism 140 is equipped with a housing. The welding execution mechanism 150 adopts a plasma arc welding machine, which has high energy density, small heat-affected zone and high welding accuracy. A laser welding machine can also be used.

[0034] The dual-welding-torch welding device of this embodiment effectively solves the core technical problem of misalignment of the dual welding torches caused by dynamic deformation of the workpiece by integrating a dual welding torch head assembly with independently adjustable spacing and angle, and a positioning and correction mechanism 140 that can move synchronously with the welding process and actively apply force. Specifically, the positioning and correction mechanism 140 clamps the workpiece on both sides and continuously rolls against it before the welding of the dual welding torch head assembly through its first rolling contact part 344 and second rolling contact part 149. The drive unit actively controls the application of a lateral correction force to the workpiece, thereby maintaining the straightness and positional stability of the workpiece in real time during the dynamic process of deformation caused by welding heat input. This provides a necessary and stable physical basis for the continuous and accurate spatial alignment of the two welding torch heads in the dual welding torch head assembly along the entire weld seam. Based on this, the dual welding gun assembly can perform synchronous symmetrical welding on both sides of the workpiece, which not only significantly improves welding efficiency, but more importantly, it fundamentally suppresses asymmetrical welding deformation by balancing heat input, while ensuring the penetration quality and consistency of the weld. This allows the efficient and high-quality process of double-sided synchronous welding to be implemented stably and reliably in the welding of long strip workpieces, reducing the dependence on the initial assembly accuracy of the workpiece and complex rigid tooling.

[0035] The movable base 100 includes a chassis 110 and a slide 120 fixedly mounted on the chassis 110. A worktable 130 is reciprocally mounted on the slide 120 via a sliding assembly. The sliding assembly includes a slide rail 122 mounted on the slide 120 and a slider 132 mounted on the bottom of the worktable 130 and cooperating with the slide rail 122. The movable base 100 also includes a linear drive assembly for driving the worktable 130. The linear drive assembly includes a rack 124 mounted on the slide 120, a servo motor 134 mounted on the worktable 130, and a gear driven by the servo motor 134 and meshing with the rack 124. The rack 124 and the gear employ a spur or helical gear structure. Using a helical gear rack drive not only improves transmission smoothness but also helps increase the axial stiffness of the system during continuous reciprocating motion, reducing wobbling caused by backlash, thereby further improving the trajectory accuracy and stability of the applied correction force in long-stroke welding. In the linear drive assembly, helical gear rack is the preferred solution, and alternatives may include high-precision ball screw pairs or synchronous belt drive systems. The slide rail 122 on the slide table 120 has a concave slide path on its side, which cooperates with the slider 132 adapted to the shape of the bottom of the worktable 130. This structure not only provides strong lateral support resistance for the positioning and correction mechanism 140 when applying lateral correction force, but its concave mechanical interlocking structure also provides effective longitudinal resistance when the worktable 130 moves carrying loads such as the welding mechanism 150 and the positioning and correction mechanism 140, preventing the worktable assembly from tilting or lifting due to force during operation, thus ensuring the rigidity and trajectory stability of the entire moving system during dynamic welding. The chassis 110 also houses welding devices such as gas cylinders, as well as electrical mechanisms such as electrical cabinets.

[0036] The position adjustment assembly also includes a first support arm 142 and a first guide shaft 146. The first support arm 142 is fixed on the worktable 130. One end of the first guide shaft 146 passes through the first support arm 142, and the other end is connected to the first mounting base 148. The first drive component 144 is a first telescopic cylinder, the body of which is fixed on the first support arm 142, and its output shaft is connected to the first mounting base 148. The clamping and correction assembly also includes a second support arm 141 and a second guide shaft 145. The second support arm 141 is fixed to the first mounting base 148, and one end of the second guide shaft 145 passes through the second support arm 141, while the other end is connected to the second mounting base 147. The second drive component 143 is a second telescopic cylinder, the body of which is fixed to the second support arm 141, and its output shaft is connected to the second mounting base 147. The first and second telescopic cylinders are specifically electric cylinders. The first and second telescopic cylinders may also include servo hydraulic cylinders or precision pneumatic cylinders and, in conjunction with high-precision pressure and displacement sensors, form a closed-loop control, which can also achieve precise controllability and rapid response of the clamping force. The position adjustment assembly also includes a positioning component, which includes a positioning shaft fixed to the first mounting base 148 or the second support arm 141, and a first rolling contact portion 344 mounted on the end of the positioning shaft. The clamping and correction assembly also includes a correction part, which includes a correction shaft fixed to the second mounting base 147, and a second rolling contact portion 149 mounted on the end of the correction shaft. The first rolling contact portion 344 and the second rolling contact portion 149 are preferably bearing-type rollers. Using bearing-type rollers not only results in a low coefficient of friction, but their internal raceways and rolling element structures can withstand high radial loads. While continuously applying a corrective force, they ensure a pure rolling relationship with the workpiece contact surface, greatly reducing wear and the risk of scratching the workpiece surface coating. During welding, two driving components drive the two rolling contact portions to clamp the workpiece 50 on opposite sides, and the clamping force can be set according to process requirements. As the worktable 130 drives the entire mechanism to move synchronously along the workpiece length, the two rolling contact portions continuously roll and rub against the workpiece sidewalls while clamped. This design not only reduces movement resistance, but more importantly, it applies a continuous lateral corrective force to the workpiece through actively controlled clamping force. When the workpiece tends to bend to one side due to initial heating on one side (there may be initial deformation or instantaneous asymmetry in heat input before simultaneous welding with dual welding guns), the positioning and correcting mechanism 140 can counteract this tendency in real time, forcibly maintaining the workpiece within the set straightness range, ensuring the local positional stability of the workpiece in the welding area.

[0037] The position adjustment assembly also includes a clamping member 342, which is mounted on the second support arm 141 to apply pressure from the top of the workpiece 50 to be welded. The clamping member 342 includes a support, an adjusting screw adjustable on the second support arm 141, and rollers mounted on the support. The clamping member 342 adopts a screw and roller structure with independently adjustable height, which can adapt to workpieces of different heights or with initial assembly errors. Individual leveling ensures uniform and effective vertical pressure, which, together with the lateral clamping force, forms a three-dimensional spatial constraint to more comprehensively suppress complex deformation.

[0038] Preferably, two first rolling contact portions 344 are provided, respectively mounted on both sides of the end of the second support arm 141 via corresponding positioning shafts, and abut against one side of the workpiece 50 to be welded, forming a clamping and straightening effect on the workpiece 50 with the second rolling contact portion 149 on the other side. The two first rolling contact portions 344 are arranged at a certain distance along their length on the same side of the workpiece, cooperating with the single-point second rolling contact portion 149 on the opposite side, forming a short-span "two-point clamping one-point" stable constraint structure. This mechanism significantly increases the constraint arm within the cross-section of the workpiece. When the workpiece tends to bend towards the clamping side or the opposite side due to welding heat input, this structure can provide more effective resistance to bending moment, thereby improving the ability to suppress longitudinal bending deformation and the stability of correction. At the same time, the two first rolling contact portions 344 disperse the pressure applied to one side of the workpiece, avoiding excessive local pressure or stress concentration that may be caused by single-point contact. This is particularly important for protecting the workpiece surface (such as pre-coating) and preventing local indentation or deformation of thin-walled or high-strength materials under strong pressure. Furthermore, when the workpiece has initial slight bending or assembly misalignment, the two first rolling contact parts 344, due to their span, can better adapt to this initial unevenness. Through their own rolling and elastic adjustment, they achieve smoother and more continuous contact and guidance, reducing the risk of correction failure due to single-point contact "jamming" or "loosening". From a kinematic perspective, the two rolling contact points together with one rolling contact point form a more stable kinematic pair, making the posture of the positioning and correction mechanism 140 relative to the workpiece (especially the deflection around the vertical axis) more stable as the worktable 130 moves along the length of the workpiece. This reduces the fluctuation of the correction force caused by the mechanism's wobbling and helps maintain the continuity and uniformity of the correction force.

[0039] In the aforementioned dual-welding-torch welding device, when the device moves to the end of the workpiece, the first drive member 144 and the second drive member 143 of the positioning and correction mechanism 140 actuate, causing the first rolling contact part 344 and the second rolling contact part 149 to clamp the workpiece from both sides. Simultaneously, the drive unit 151 and the rotation drive member of the dual-welding-torch assembly actuate, pre-adjusting the spacing and angle of the two welding torch heads 158 according to the workpiece type and weld position, aligning them with the predetermined weld. During the synchronous welding and correction process, the worktable 130 begins to move at a constant speed along the length of the workpiece. The robot of the welding execution mechanism 150 performs possible micro-motion tracking according to the programmed path. The two welding torch heads 158 in the dual-welding-torch assembly simultaneously ignite arcs, performing synchronous symmetrical welding on opposite sides of the workpiece. Meanwhile, the positioning and correction mechanism 140 maintains the clamping state and moves synchronously with the worktable. Throughout the entire mobile welding process, the positioning and correction mechanism 140 applies a lateral constraint force to the workpiece through its rolling contact portion, counteracting and correcting the dynamic deformation of the workpiece caused by welding heat input in real time. This firmly locks the workpiece position in the welding area, providing a nearly undisturbed and stable operating platform for the two welding torch heads 158 that must be precisely aligned for subsequent welds. This embodiment combines a dual welding torch head assembly with independently adjustable spacing and angle with a synchronously moving, actively force-applying follow-up positioning and correction mechanism 140, constructing a closed-loop "dynamic correction-precision welding" system. The positioning and correction mechanism 140 solves the fundamental problem of dynamic workpiece deformation, ensuring the prerequisite for implementing the dual-welding torch synchronous welding process. The efficient double-sided synchronous welding itself balances the heat input, further reducing overall deformation. Together, they achieve the goal of significantly improving welding efficiency while ensuring high welding quality (good penetration, minimal deformation), effectively overcoming many shortcomings of existing technologies.

[0040] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0041] The above-described embodiments are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A twin welding gun welding apparatus characterized by, include: Mobile base; The worktable is mounted on the movable base and can reciprocate along a direction parallel to the length of the workpiece to be welded; A welding actuator is set on the workbench, and its end is provided with a double welding gun head assembly. The double welding gun head assembly includes two welding gun heads whose spacing and angle can be adjusted independently, so that they are distributed on opposite sides of the workpiece to be welded and aligned with the weld seam during welding. A positioning and correction mechanism is disposed on the worktable and can move synchronously with the worktable, including a position adjustment component and a clamping and correction component; the position adjustment component includes a first driving member, a first mounting base driven by the first driving member to move linearly, and a first rolling contact portion mounted on the first mounting base; the clamping and correction component includes a second driving member, a second mounting base driven by the second driving member to move linearly, and a second rolling contact portion mounted on the second mounting base. The first and second driving components drive the first and second rolling contact parts to clamp the first and second rolling contact parts on opposite sides of the workpiece to be welded in front of the dual welding gun assembly. During synchronous movement along the length of the workpiece, they continuously roll and abut against each other. This allows the dual welding gun assembly to apply a lateral correction force to the workpiece, which is dynamically deformed due to the welding heat input, while welding, so as to maintain its straightness and positional stability in real time. This provides a stable working basis for the continuous and accurate alignment of the two welding guns.

2. The dual weld gun welding apparatus of claim 1, wherein, The dual welding torch assembly also includes a mounting bracket and two symmetrically arranged slides, with the two welding torches respectively mounted on the corresponding slides. The mounting bracket is provided with guide rails and a drive unit corresponding to the two slides respectively. The drive unit drives the slides to move linearly along the guide rails to independently adjust the distance between the two welding torches.

3. The dual-welding-gun welding device according to claim 2, characterized in that, A rotation drive is also provided between the slide and the corresponding welding torch head. The rotation drive drives the welding torch head to rotate around at least one axis to independently adjust its welding angle.

4. The dual-welding-gun welding device according to claim 1, characterized in that, The movable base includes a chassis and a slide fixedly mounted on the chassis. The worktable is reciprocally mounted on the slide via a sliding assembly. The sliding assembly includes a slide rail mounted on the slide and a slider mounted on the bottom of the worktable and cooperating with the slide rail.

5. The dual-welding-gun welding device according to claim 4, characterized in that, The movable base also includes a linear drive assembly for driving the worktable to move. The linear drive assembly includes a rack disposed on the slide, a servo motor disposed on the worktable, and a gear driven by the servo motor and meshing with the rack. The rack and gear are helical or spur gears.

6. The dual-welding-gun welding device according to claim 1, characterized in that, The position adjustment assembly further includes a first support arm and a first guide shaft. The first support arm is fixed on the worktable, one end of the first guide shaft passes through the first support arm, and the other end is connected to the first mounting base. The first driving component is a first telescopic cylinder, the body of which is fixed on the first support arm, and its output shaft is connected to the first mounting base.

7. The dual-welding-gun welding device according to claim 6, characterized in that, The clamping and correction assembly further includes a second support arm and a second guide shaft. The second support arm is fixed on the first mounting base, and one end of the second guide shaft passes through the second support arm and the other end is connected to the second mounting base. The second driving component is a second telescopic cylinder, the body of which is fixed on the second support arm and its output shaft is connected to the second mounting base. The first telescopic cylinder and the second telescopic cylinder are electric cylinders or hydraulic cylinders.

8. The dual-welding-gun welding device according to claim 7, characterized in that, The position adjustment assembly further includes a positioning element, which includes a positioning shaft fixed to the first mounting base or the second support arm, and a first rolling contact portion mounted on the end of the positioning shaft.

9. The dual-welding-gun welding device according to claim 8, characterized in that, The clamping and correction assembly further includes a correction part, which includes a correction shaft fixed on the second mounting base and a second rolling contact part mounted on the end of the correction shaft. The first rolling contact part and the second rolling contact part are bearing-type rollers.

10. The dual-welding-gun welding device according to claim 7, characterized in that, The position adjustment assembly further includes a pressure holding member disposed on the second support arm for applying pressure from the top of the workpiece to be welded. The pressure holding member includes a support, an adjustable adjusting screw mounted on the second support arm, and a roller mounted on the support.

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