Cross arm welding device

Abstract

The invention relates to the technical field of welding, in particular to a cross arm welding device which comprises a welding component, a welding component, a welding component and a welding component. The overturning part is located below the welding machine head and comprises a main vehicle body and an auxiliary vehicle body; the opposite side faces of the main vehicle body and the auxiliary vehicle body are each provided with a plurality of protruding parts. The protruding parts of the main vehicle body and the protruding parts of the auxiliary vehicle body can be connected in a staggered and inserted mode. The protruding part is provided with an arc-shaped surface used for being attached to the outer wall of a workpiece. And walking rollers are arranged on the bottom surfaces of the main vehicle body and the auxiliary vehicle body. By designing the low-height overturning part, the main vehicle body and the auxiliary vehicle body adopt the protruding part structures which are connected in a staggered and inserted mode and are matched with the arc-shaped attaching faces, large tank type workpieces can be directly shoveled up and lifted from the ground, the dangerous operation process that a crane or a forklift is used for high-altitude hoisting is completely avoided, and the operation safety is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, in particular to a cross-arm welding device. Background Art

[0002] Cross-arm welding systems are widely used as key equipment in the manufacture of large metal structures, particularly rotating structures such as tanks and cylinders. The core of this type of system lies in its cross-arm structure, which is typically equipped with a welding head (such as a welding torch or submerged arc welding head), a wire feed mechanism, a travel drive system, and a precise control unit. The primary function of a cross-arm welding system is to efficiently and automatically weld circumferential seams on large workpieces, such as tank segments. To achieve continuous welding of the circumferential seam around the workpiece, existing solutions generally rely on a matching tilting base. This tilting base typically consists of a rigid frame of a certain height, mounted with active and passive rollers. During welding, a large workpiece (such as a cylinder) is placed on the rollers, which drive the workpiece to rotate at a constant speed around its axis. Simultaneously, the welding head, mounted on the cross-arm welding system, moves along a predetermined trajectory or remains fixed in position, completing the weld of the entire circumference. This "workpiece rotation + relative movement of the welding torch" approach is currently the mainstream process for welding large circumferential seams.

[0003] However, the existing cross-arm welding device using a flip base has a significant drawback: the structural design of the flip base itself means that its frame must have a considerable height to meet the installation space requirements of the roller support and drive mechanism. The welding objects targeted by the cross-arm welding device are precisely large canister-like workpieces that are bulky and incredibly heavy. This means that before welding, the heavy workpiece must first be accurately hoisted or lifted to the height of the flip base rollers and placed stably on the rollers. This process often requires the use of a large crane or multiple forklifts for coordinated operation. Not only is the process cumbersome, time-consuming and labor-intensive, and occupies large hoisting equipment resources, but there are also high safety risks and hidden dangers of workpiece collision and damage. The difficulty in loading materials caused by the height of the matching flip base has seriously restricted the improvement of the overall operating efficiency and ease of application of the cross-arm welding device, and has become a technical problem that needs to be solved urgently. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is that the flip base of the existing cross-arm welding device must maintain a relatively high frame due to structural limitations to accommodate the roller support and drive mechanism. However, the welding objects of this device are mostly large and heavy barrel-like workpieces, which requires the use of heavy lifting equipment to lift the workpiece to the height of the flip base before operation. This process has three major drawbacks: (1) It requires the coordinated operation of a large crane or multiple forklifts, resulting in high equipment investment costs; (2) The lifting process is complicated and time-consuming; and (3) There are safety hazards such as workpieces falling and bumping.

[0005] The above technical problems are solved by the following technical solution: The present invention provides a cross-arm welding device, comprising a welding component, including a base, a longitudinal arm and a transverse arm movably mounted on the base, wherein the longitudinal arm and the transverse arm are arranged in a cross shape; a driving member is mounted on the longitudinal arm and / or the transverse arm to drive them to move; a welding head and a wire feeding member are arranged at one end of the transverse arm; The flip component is located below the welding head and includes a main body and an auxiliary body; multiple protrusions are provided on the facing sides of the main body and the auxiliary body; the protrusions of the main body and the protrusions of the auxiliary body can be staggered and plugged into each other; the protrusions have an arc surface for fitting the outer wall of the workpiece; the bottom surfaces of the main body and the auxiliary body are provided with walking rollers.

[0006] In a preferred embodiment of the cross-arm welding device of the present invention: the main vehicle body and the auxiliary vehicle body both include a main body; the protrusions are arranged at equal intervals on the side surfaces of the main body; a rotating wheel group is provided on the arc surface of the protrusion, and the rotating wheel group includes a driving wheel and a driven wheel.

[0007] In a preferred embodiment of the cross-arm welding device of the present invention: the walking rollers include a first row of rollers arranged on the bottom surface of the protrusion and a second row of rollers arranged on the bottom surface of the main body; the number of rollers in the second row is greater than that in the first row; the first row of rollers and the second row of rollers are alternately arranged in the length direction of the vehicle body.

[0008] In a preferred embodiment of the cross-arm welding device of the present invention: the second row of rollers of the main vehicle body are connected in series via a connecting rod; a first motor is provided on the main vehicle body; the first motor is connected via a transmission mechanism and drives the connecting rod to rotate.

[0009] In a preferred embodiment of the cross-arm welding device of the present invention: connecting parts are provided on two symmetrical side surfaces of the front end of the protruding part of the auxiliary body; the connecting parts include a first cavity and a second cavity that are interconnected; an extrusion block is slidably provided in the first cavity, and an insertion rod is slidably provided in the second cavity; the volume of the first cavity is greater than the volume of the second cavity; a first return spring acting on the extrusion block is provided in the first cavity.

[0010] In a preferred embodiment of the cross-arm welding device of the present invention: a strip groove is provided on the side surface between adjacent protrusions of the main vehicle body; a screw is provided in the strip groove; a slide is threadedly connected to the screw; a socket for inserting the insertion rod is provided on the slide; a first bevel gear that can move axially in the keyway is provided at one end of the screw; a second bevel gear is provided on the connecting rod; a movable baffle is provided on the slide, and the baffle has a trapezoidal end for squeezing the first bevel gear.

[0011] In a preferred embodiment of the cross arm welding device of the present invention: a second return spring is provided between the baffle and the slide; and the first bevel gear is connected to a third return spring for disengaging the first bevel gear from the second bevel gear.

[0012] In a preferred embodiment of the cross-arm welding device of the present invention: the base is rotatably mounted on the ground or a mobile platform, the longitudinal arm is vertically mounted above the base, and the cross arm is horizontally mounted on the longitudinal arm and arranged perpendicular to the longitudinal arm.

[0013] In a preferred embodiment of the cross-arm welding device of the present invention: the driving component includes a longitudinal arm driving assembly and a transverse arm driving assembly both of which adopt drag chain transmission, the longitudinal arm driving assembly drives the longitudinal arm to move along the base, and the transverse arm driving assembly drives the transverse arm to move along the longitudinal arm.

[0014] In a preferred embodiment of the cross-arm welding device of the present invention: the welding head is mounted on a multi-jaw chuck provided at one end of the cross arm, and the wire feeder is mounted on the cross arm at one end of the welding head.

[0015] The beneficial effects of the present invention are as follows: the present application fundamentally solves the technical problem of traditional cross-arm welding devices requiring the lifting of heavy workpieces by designing a low-height flip component. Specifically, the main body and auxiliary body adopt a staggered protrusion structure, which, in conjunction with the arc-shaped fitting surface, can directly scoop up and lift large canister-type workpieces from the ground, completely avoiding the dangerous operation process of using a crane or forklift for high-altitude lifting, and significantly improving operational safety. The arc surface of the protrusion smoothly transitions to the ground, and the flattened walking roller arrangement enables the workpiece to be smoothly lifted from the ground to the welding height, eliminating the cumbersome lifting and positioning links in traditional devices, greatly improving operating efficiency, and is particularly suitable for production line applications where workpieces need to be frequently replaced.

[0016] The main body and auxiliary body can be completely separated and moved independently through walking rollers. Compared with the traditional integral elevated flip base, it greatly simplifies the transportation and on-site assembly process and significantly reduces the cost of use. The device also uses a mechanical linkage locking mechanism that is automatically triggered when the main body and auxiliary body are closed, ensuring that the two move synchronously and work together to lift heavy workpieces. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings of the embodiments of the present invention. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Among them: Figure 1 This is a working diagram of the cross-arm welding device; Figure 2 This is a schematic diagram of the overall structure of the cross arm welding device; Figure 3 Schematic diagram of the cross-sectional structure of the flip component Figure 1 ; Figure 4 Schematic diagram of the cross-sectional structure of the flip component Figure 2 ; Figure 5 for Figure 4 A schematic diagram of the structure at center A; Figure 6 for Figure 4 Enlarged schematic diagram of the structure at point B in the middle.

[0018] In the picture: 100. Welding parts; 101. Base; 102. Longitudinal arm; 103. Cross arm; 104. Drive element; 105. Welding head; 106. Wire feeder; 107. Longitudinal arm drive assembly; 108. Cross arm drive assembly; 109. Multi-jaw chuck; 200, flip component; 201, main body; 202, auxiliary body; 203, protrusion; 204, curved surface; 205, running roller; 206, main body; 207, rotating wheel assembly; 208, driving wheel; 209, driven wheel; 210, first row of rollers; 211, second row of rollers; 212, connecting rod; 213, first motor; 214, transmission mechanism; 300, connecting member; 301, first cavity; 302, second cavity; 303, extrusion block; 304, insertion rod; 305, first return spring; 400, strip groove; 401, screw; 402, slide; 403, socket; 404, first bevel gear; 405, second bevel gear; 406, baffle; 407, trapezoidal end; 408, second return spring; 409, third return spring. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the present invention, the present invention is further described in detail below with reference to specific embodiments and the accompanying drawings.

[0020] The terms used in the present invention are those commonly used in the art in view of the functions of the present invention, but these terms may vary according to the intentions of those skilled in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the present invention. Therefore, the terms used in the specification should not be understood as simple names, but rather as the meanings of the terms and the overall description of the present invention.

[0021] Reference Figures 1-6 The present embodiment provides a cross-arm welding device, comprising a welding component 100, including a base 101, a longitudinal arm 102 and a transverse arm 103 movably mounted on the base 101, wherein the longitudinal arm 102 and the transverse arm 103 are arranged in a cross shape; a driving member 104 is mounted on the longitudinal arm 102 and / or the transverse arm 103 to drive the movement thereof; a welding head 105 and a wire feeding member 106 are arranged at one end of the transverse arm 103; a flip component 200 is located at the welding The lower part of the connecting head 105 includes a main body 201 and an auxiliary body 202; a plurality of protrusions 203 are provided on the facing sides of the main body 201 and the auxiliary body 202; the protrusions 203 of the main body 201 and the protrusions 203 of the auxiliary body 202 can be interlaced and plugged into each other; the protrusions 203 have an arc-shaped surface 204 for fitting the outer wall of the workpiece; the bottom surfaces of the main body 201 and the auxiliary body 202 are both provided with walking rollers 205.

[0022] In this embodiment, the device mainly consists of two parts: a welding part 100 and a flip part 200. The welding part 100 adopts a typical cross-arm structure, including a fixed base 101 and a longitudinal arm 102 and a transverse arm 103 that are movable on the base 101. This cross-shaped layout provides the welding head 105 with multi-degree-of-freedom movement capabilities, enabling it to be accurately positioned in three-dimensional space. The drive mechanism is installed on the longitudinal arm 102 and / or the transverse arm 103 to provide power for the movement of the robotic arm. The welding head 105 and its supporting wire feeding device are arranged at the end of the transverse arm 103. This layout ensures both the flexibility of the welding operation and the stability of the welding process.

[0023] The flip unit 200, located below the welding head 105, consists of two independent modules: a main body 201 and an auxiliary body 202. The facing sides of the two bodies are each equipped with multiple protrusions 203. These protrusions 203 utilize a special staggered interlocking design, allowing them to interlock like interlaced fingers. The contact surface of the protrusions 203 is designed to be arc-shaped, which better conforms to the outer surface of the cylindrical workpiece. The running rollers 205 located at the bottom of the body enable the entire flip unit 200 to move autonomously, providing greater flexibility for workpiece positioning. The advantage of this structural design is that the relative movement of the main body 201 and auxiliary body 202 allows for automatic clamping and lifting of the workpiece without the need for external lifting equipment. The staggered interlocking design of the protrusions 203 not only enhances the stability of the structure but also ensures precise positioning of the workpiece during the welding process. The arc-shaped contact surface design minimizes stress concentration on the workpiece surface, protecting the workpiece from damage. The modular design of the entire device makes it more adaptable and maintainable.

[0024] Reference Figure 2-Figure 6 The main vehicle body 201 and the auxiliary vehicle body 202 both include a main body 206; the protrusions 203 are arranged at equal intervals on the side of the main body 206; a rotating wheel group 207 is provided on the arc surface 204 of the protrusion 203, and the rotating wheel group 207 includes a driving wheel 208 and a driven wheel 209.

[0025] It should be noted that the main body 206 is a monolithic structure, integrally formed with the protrusion 203. This design enhances structural strength and stability. The main body 206 is essentially a regular rectangular block, providing a stable foundation for the entire flip component 200. The protrusions 203 are fixed to the side of the main body 206 in an equidistant arrangement, and their shape approximates a right-angled triangle. This unique design allows one right-angled side of the protrusion 203 to be firmly connected to the main body 206, while the other right-angled side naturally conforms to the ground, forming a stable support structure. The hypotenuse is designed as a curved surface 204, which is specifically designed to perfectly conform to the outer wall of a cylindrical workpiece.

[0026] A rotating wheel group 207 is provided on the arc surface 204 of the protrusion 203, and the rotating wheel group 207 consists of a driving wheel 208 and a driven wheel 209. The driving wheel 208 is located in the upper area of ​​the arc surface 204 and is connected in series through a connecting rod. This high-position arrangement cleverly avoids interference with the plug-in mechanism of the main and auxiliary car bodies 202; the driven wheel 209 is arranged at the lower position of the arc surface 204, and cooperates with the driving wheel 208 to jointly support and guide the rotation of the workpiece. The distribution design of the rotating wheel group 207 not only ensures the stability of the workpiece rotation, but also ensures the compactness of the structure of the entire flip component 200.

[0027] The main vehicle body 201 and the auxiliary vehicle body 202 work together through the staggered insertion of the protrusions 203. As shown in the figure, the four protrusions 203 set on the main vehicle body 201 and the three protrusions 203 on the auxiliary vehicle body 202 cooperate with each other to form a stable cross-finger structure. This specific number configuration not only ensures sufficient support points, but also ensures the smoothness of the insertion process.

[0028] In the present technical solution, the number of protrusions 203 of the main vehicle body 201 and the auxiliary vehicle body 202 can be flexibly configured according to the size of the workpiece and the load-bearing requirements, and is not limited to a specific number. The protrusions 203 are fixed to the side of the main body 206 in an equidistant arrangement, and their structural features remain unified: the main body 206 is a rectangular block base, the protrusions 203 are right-angled triangles and are integrally formed with the main body 206, the right-angled sides are respectively fixed to the main body 206 and fit the ground, and the inclined surface is designed as an arc surface 204 for installing the rotating wheel group 207. The rotating wheel group 207 includes a driving wheel 208 and a driven wheel 209 for support linked by a connecting rod. This modular design ensures that the main and auxiliary vehicle bodies 202 can still achieve stable plug-in matching in the case of different numbers of protrusions 203, and enables the device to adapt to the welding needs of various workpieces.

[0029] Reference Figure 3-Figure 6 The running rollers 205 include a first row of rollers 210 disposed on the bottom surface of the protrusion 203 and a second row of rollers 211 disposed on the bottom surface of the main body 206. The second row of rollers 211 is larger than the first row of rollers 210, and the first and second rows of rollers 210 and 211 are arranged alternately along the length of the vehicle. The second row of rollers 211 of the main body 201 are connected in series via a connecting rod 212. The main body 201 is equipped with a first motor 213, which is connected to the connecting rod 212 via a transmission mechanism 214 and drives the rotation of the connecting rod 212.

[0030] It should be noted that the running rollers 205 utilize a unique double-row alternating arrangement to achieve stable movement. Two parallel roller arrangements are located at the bottom of the vehicle body: the first row of rollers 210 are mounted directly on the underside of the protrusion 203, while the second row of rollers 211 are mounted on the underside of the main body 206. This arrangement fully accounts for the unique characteristics of the vehicle body structure. The second row of rollers 211 is larger than the first row of rollers 210 to provide a more balanced distribution of supporting force. Of particular note, the second row of rollers 211 of the main body 201 are mechanically connected in series via a connecting rod 212 extending through it, forming a unified drive. The connecting rod 212 is driven by a specially designed first motor 213 through a transmission mechanism 214 (such as a chain or gear). When the first motor 213 is running, all the second-row rollers 211 are driven to rotate synchronously through the connecting rod 212, thereby driving the entire main vehicle body 201 to move smoothly. This driving method not only improves the transmission efficiency, but also ensures the consistency of the rotation speed among multiple walking rollers 205, effectively preventing the walking deviation problem caused by speed difference. The design of the entire walking roller 205 fully considers key factors such as load distribution, movement smoothness and driving efficiency, providing a solid foundation for the reliable operation of the flip component 200.

[0031] Reference Figure 3-Figure 6 , connecting parts 300 are provided on two symmetrical sides of the front end of the protrusion 203 of the auxiliary body 202; the connecting part 300 includes a first cavity 301 and a second cavity 302 that are interconnected; an extrusion block 303 is slidably provided in the first cavity 301, and an insertion rod 304 is slidably provided in the second cavity 302; the volume of the first cavity 301 is greater than that of the second cavity 302; a first return spring 305 is provided in the first cavity 301 to act on the extrusion block 303.

[0032] In this embodiment, a symmetrical layout is adopted at the front end of each protrusion 203 of the auxiliary body 202, and a connecting piece 300 is provided on both sides of the front end of the protrusion 203 to ensure balanced force. The core of the connecting piece 300 is a hydraulic / pneumatic transmission consisting of two interconnected first cavities 301 and second cavities 302: the first cavity 301 with a larger volume is connected to the second cavity 302 with a smaller volume through a channel to form a closed fluid transfer space. A slidable extrusion block 303 is installed in the first cavity 301, and the extrusion block 303 is maintained in the initial position by a first return spring 305, and the extrusion block 303 is provided with an inclined surface on the front to facilitate extrusion and retraction; a slidable insertion rod 304 is provided in the second cavity 302, and the ends of the extrusion block 303 and the insertion rod 304 are provided with rubber blocks as seals to ensure pressure transmission. When an external force acts on the extrusion block 303, it compresses the first return spring 305 and moves it toward the interior of the first cavity 301, forcing the fluid (gas or liquid) within the cavity into the second cavity 302 through the connecting channel, thereby pushing the insertion rod 304 outward. This design cleverly utilizes Pascal's principle, amplifying force transmission through the volume difference between the two cavities and ensuring that the insertion rod 304 receives sufficient extension force. The provision of the first return spring 305 ensures that after the external force is released, the extrusion block 303 automatically resets, while the fluid backflow drives the insertion rod 304 back. This connection mechanism features rapid response, smooth force transmission, and reliable self-locking, providing key technical support for the precise linkage between the main body 201 and the auxiliary body 202.

[0033] A strip groove 400 is defined on the side surface between adjacent protrusions 203 of the main body 201. A screw 401 is disposed within the strip groove 400. A slide 402 is threadedly connected to the screw 401. The slide 402 has a socket 403 for inserting the insertion rod 304. A first bevel gear 404 is provided at one end of the screw 401, which is axially movable along a keyway. A second bevel gear 405 is provided on the connecting rod 212. A movable baffle 406 is provided on the slide 402, having a trapezoidal end 407 for compressing the first bevel gear 404. A second return spring 408 is disposed between the baffle 406 and the slide 402. A third return spring 409 is connected to the first bevel gear 404, disengaging it from the second bevel gear 405.

[0034] It should be noted that this technical solution has designed a set of precise mechanical linkage mechanisms on the main body 201, which realizes the synchronous movement of the main body 201 and the auxiliary body 202 through a unique gear transmission and plug-in locking mechanism. A longitudinal strip groove 400 is provided on the side between adjacent protrusions 203, and a rotatable screw 401 is arranged in parallel in the groove. A slidable slide 402 is installed on the screw 401 through threaded engagement. One side of the slide 402 is provided with a socket 403 specifically for receiving the plug rod 304 of the auxiliary body 202, forming a reliable mechanical connection interface. A first axially movable bevel gear 404 is designed at the end of the screw 401. It is connected by a keyway to achieve the functions of both axial sliding and torque transmission. It cooperates with the second bevel gear 405 fixed to the connecting rod 212 to form a power transmission system. The baffle 406 mounted on the slide 402, with its unique trapezoidal end 407, precisely controls the axial position of the first bevel gear 404. When the baffle 406 is moved by an external force, its trapezoidal end 407 pushes the first bevel gear 404 axially, engaging or disengaging it with the second bevel gear 405. Dual return springs are employed: a second return spring 408, mounted between the baffle 406 and the slide 402, maintains the baffle 406 in its initial position; a third return spring 409, connected to the first bevel gear 404, is specifically responsible for disengaging it from the second bevel gear 405 when necessary. This design ensures both timely power transmission and automatic reset of the mechanism when not in operation.

[0035] This technical solution adopts a design of a linkage mechanism involving a connecting rod 212, a bevel gear set, a screw 401, a slide 402, and a plug 304. This design offers numerous technical advantages over solutions in which the main and auxiliary bodies 201 and 202 are independently driven. This design ensures absolute synchronization of the main and auxiliary bodies 202 through mechanical linkage, completely avoiding the speed asynchrony issues that can occur in dual-drive systems. When the plug 304 is inserted into the socket 403 of the slide 402, the rotation of the screw 401 directly drives the linear movement of the slide 402, achieving precise synchronization of the auxiliary body 202 and the main body 201 through a rigid connection. This mechanical forced synchronization mechanism is more reliable than electronically controlled synchronization. Only a single drive motor is required on the main body 201, and power is efficiently transmitted to the auxiliary body 202 via the connecting rod 212, the bevel gear, and the screw 401. This not only saves a complete drive system, reduces manufacturing costs, but also reduces potential points of failure. The unique self-locking feature of the screw 401 transmission automatically maintains its position when the drive stops, eliminating the need for an additional brake device. In contrast, a dual-motor solution requires a complex braking circuit to prevent slippage during power failure. Another major advantage of this design is its purely mechanical linkage triggering method, which automatically completes the linkage action through the physical contact of the inserted rod 304, making it more direct and reliable than solutions that rely on electronic sensors. Furthermore, the screw 401 transmission provides a natural overload protection function. When closing resistance is excessive, it is immediately reflected in the motor load, facilitating timely shutdown protection. In contrast, a dual-motor system may suffer structural damage due to uneven output.

[0036] This technical solution integrates the driving components of the travel roller 205 and the linkage components of the slide 402 through a single transmission system. This design decision was made based on a deep understanding of the device's motion logic. The core of this design concept lies in the recognition that the movement of the travel roller 205 and the closing of the main body 201 and auxiliary body 202 are essentially coordinated actions within the same process flow. The forward motion of the travel roller 205 directly translates into the closing of the body, and the two have completely consistent motion objectives and timing requirements. By simultaneously distributing the power output of the first motor 213 to the travel roller 205 drive connecting rod 212 and the slide 402 moving screw 401, native synchronization of these two key moving components is achieved. This synchronization is not a simple mechanical connection, but rather an intelligent linkage based on a consistent understanding of the motion objectives. When the motor-driven connecting rod 212 drives the travel roller 205 to rotate, advancing the main body 201, a portion of the power is transferred to the screw 401 via the bevel gear set, causing the slide 402 to move synchronously, thereby driving the coordinated movement of the attached auxiliary body 202. This design ensures precise matching between the travel distance of the running roller 205 and the displacement of the slide 402 during the closing process, avoiding the potential cumulative errors that could arise from separate control. More importantly, this integrated transmission design embodies the principle of reverse-engineering the optimal power transmission path based on the equipment's ultimate goal (precise closing), rather than simply piecing together two independent systems. This linkage mechanism, built on the consistency of motion objectives, ensures reliability while simplifying control logic.

[0037] Reference Figure 1-Figure 2 The base 101 is rotatably mounted on the ground or a mobile platform. The longitudinal arm 102 is vertically mounted above the base 101. The cross arm 103 is horizontally mounted on the longitudinal arm 102 and arranged perpendicularly thereto. The drive member 104 includes a longitudinal arm drive assembly 107 and a cross arm drive assembly 108, both of which utilize a drag chain drive. The longitudinal arm drive assembly 107 drives the longitudinal arm 102 along the base 101, while the cross arm drive assembly 108 drives the cross arm 103 along the longitudinal arm 102. The welding head 105 is mounted on a multi-jaw chuck 109 at one end of the cross arm 103. The wire feeder 106 is mounted on the cross arm 103 at one end of the welding head 105.

[0038] The cross-arm welding device designed in this technical solution adopts a modular structural layout. The base 101 can be rotatably installed to realize the basic rotation function, the longitudinal arm 102 is arranged vertically to complete the lifting movement, and the cross arm 103 is installed horizontally to realize planar movement. The three cooperate to form a complete rectangular coordinate motion system. The drive system adopts a drag chain transmission method, and the movement of each axis is controlled separately by the independent longitudinal arm 102 and cross arm drive assembly 108, which not only ensures the stability of long-stroke transmission, but also facilitates maintenance. The welding actuator adopts a multi-claw chuck 109 to install the welding head 105, and cooperates with the wire feeder 106 arranged nearby to achieve rapid replacement and stable wire feeding while ensuring rigidity. This structural design takes into account the multi-degree-of-freedom motion accuracy required for welding large workpieces and the reliability of equipment operation.

[0039] Reference Figures 1-6 The working process of this cross-arm welding device is as follows, which is mainly divided into four stages: clamping and lifting, linkage locking, welding execution and disassembly and reset: Initial positioning and clamping and lifting: Move the main carriage 201 and auxiliary carriage 202 to either side of the workpiece to be welded (e.g., a large can), keeping the auxiliary carriage 202 fixed in position (this can be prevented from moving backward by, for example, providing a block at the rear). Activate the first motor 213 on the main carriage 201, which drives the connecting rod 212 via a toothed belt / chain. Because the connecting rod 212 is connected in series to the entire second row of rollers 211, it drives the second row of rollers 211 of the main carriage 201 to rotate. This, in conjunction with the first row of rollers 210, drives the entire main carriage 201 toward the workpiece. Since the protrusions 203 of the main vehicle body 201 and the auxiliary vehicle body 202 are both designed to have a specific shape with an arc-shaped fitting surface (such as a right-angled triangle), when the main vehicle body 201 moves toward the workpiece, the protrusions 203 of the two begin to contact the outer wall of the workpiece and gradually close together. During the closing process, the protrusions 203 of the main vehicle body 201 and the auxiliary vehicle body 202 are alternately inserted into each other (in the form of interlocking fingers), and use their arc-shaped lower surfaces to work together to steadily shovel and lift the workpiece located in the middle.

[0040] Interlocking locking and height locking: When the front end of the protrusion 203 of the main vehicle body 201 is plugged into the front end of the protrusion 203 of the auxiliary vehicle body 202: the protrusion 203 of the main vehicle body 201 will squeeze the extrusion blocks 303 symmetrically arranged on both sides of the front end of the protrusion 203 of the auxiliary vehicle body 202. After the extrusion blocks 303 are subjected to force, they slide inward in the first cavity 301, compressing the first return spring 305 and pressing the gas (or fluid) in the first cavity 301 into the second cavity 302 with a smaller volume. The air pressure (or hydraulic pressure) in the second cavity 302 increases, pushing the insertion rod 304 to overcome the resistance and slide outward. The extended insertion rod 304 is inserted into the socket 403 on the slide 402 in the side strip groove 400 of the protrusion 203 of the main vehicle body 201.

[0041] The insertion of the insertion rod 304 into the socket 403 triggers the synchronous movement of the auxiliary vehicle body 202: when the insertion rod 304 is inserted, its end presses the movable baffle 406 on the slide 402 inwardly, and simultaneously compresses the second return spring 408 behind the baffle 406. The trapezoidal head designed at one end of the baffle 406 moves inward accordingly, squeezing and pushing the first bevel gear 404 to move along the axial keyway of the screw 401. After the first bevel gear 404 is pushed, it enters into a meshing state with the second bevel gear 405 fixed on the connecting rod 212. At this time, the continuously rotating connecting rod 212 drives the screw 401 to rotate through the second bevel gear 405 and the first bevel gear 404. The screw 40 The rotation drives the slide 402, which is threadedly engaged with the slide 402, to move along the strip groove 400 toward the main body 206. Since the insertion rod 304 has been inserted into the insertion hole 403 of the slide 402 and is locked, the movement of the slide 402 drives the insertion rod 304 and the auxiliary vehicle body 202 connected thereto to move synchronously toward the workpiece (closing direction). At this point, the main vehicle body 201 and the auxiliary vehicle body 202 are synchronously closed under mechanical linkage. The intersection of the protrusions 203 of the two further penetrates (the fingers clasp more tightly), and the workpiece is stably lifted to the predetermined welding height. After reaching the appropriate height, the first motor 213 is stopped, and the entire flip component 200 is locked in the closed state.

[0042] Welding (including flipping): Activate the driver 104 of the welding component 100, driving the cross arm (longitudinal arm 102 and transverse arm 103) to move, precisely moving the welding head 105 to directly above the workpiece portion to be welded (e.g., a circumferential seam). Activate the wire feeder 106 and welding head 105 to begin welding. When circumferential welding is required, activate the second motor within the flipping component 200. This second motor, via a connecting rod, drives the driving wheel 208 mounted on the curved surface 204 of the protrusion 203. This driving wheel 208 rotates the workpiece, and the driven wheel 209 rolls in response to it, providing support. The workpiece flips around its axis at a constant speed under the combined action of the driving and driven wheels 208, 209. The fixed welding head 105 (or, with fine-tuning of the cross arm), completes continuous welding of the entire workpiece circle.

[0043] Disassembly and reset: After welding is completed, the first motor 213 reverses, driving the first row of rollers 210 of the main body 201 to reverse, driving the main body 201 to move outward, and at the same time, the reversed connecting rod 212 drives the screw 401 to reverse through the meshing second bevel gear 405 and the first bevel gear 404. The reverse rotation of the screw 401 drives the slide 402 to move along the strip groove 400, and the slide 402 moves outward to push the auxiliary body 202 connected to it by the insertion rod 304 to move outward synchronously, so that the main and auxiliary bodies 202 are synchronously moved outward and separated. When the two are separated to a certain distance, the pressure on the extrusion block 303 on the protruding portion 203 of the auxiliary body 202 disappears, and the compressed first return spring 305 pushes the extrusion block 303 to move outward and reset. The reset of the extrusion block 303 increases the volume of the first cavity 301, forming a negative pressure (or relying on fluid return The second bevel gear 405 is disengaged from the second bevel gear 405 and the first bevel gear 404 is disengaged from the second bevel gear 405. After the main body 201 and the auxiliary body 202 are completely separated, the workpiece falls to the ground smoothly under the guidance of the arc surface 204 of the protruding parts 203 of the two.

[0044] Finally, it should be pointed out that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways without departing from the scope of the present invention.

Claims

1. A cross-arm welding device, characterized in that: include, A welding component (100) comprises a base (101), a longitudinal arm (102) and a transverse arm (103) movably mounted on the base (101), wherein the longitudinal arm (102) and the transverse arm (103) are arranged in a cross shape; a driving member (104) is mounted on the longitudinal arm (102) and / or the transverse arm (103) to drive the movement thereof; a welding head (105) and a wire feeding member (106) are arranged at one end of the transverse arm (103); The flip component (200) is located below the welding head (105) and includes a main body (201) and an auxiliary body (202); a plurality of protrusions (203) are provided on the facing sides of the main body (201) and the auxiliary body (202); the protrusions (203) of the main body (201) and the protrusions (203) of the auxiliary body (202) can be interlaced and plugged into each other; the protrusions (203) have an arcuate surface (204) for fitting the outer wall of a workpiece; the bottom surfaces of the main body (201) and the auxiliary body (202) are both provided with walking rollers (205). The main vehicle body (201) and the auxiliary vehicle body (202) both include a main body (206); the protrusions (203) are arranged at equal intervals on the side of the main body (206); a rotating wheel group (207) is provided on the arc surface (204) of the protrusion (203); the rotating wheel group (207) includes a driving wheel (208) and a driven wheel (209). The traveling rollers (205) include a first row of rollers (210) arranged on the bottom surface of the protruding portion (203) and a second row of rollers (211) arranged on the bottom surface of the main body (206); the number of the second row of rollers (211) is greater than the number of the first row of rollers (210); and the first row of rollers (210) and the second row of rollers (211) are alternately arranged in the length direction of the vehicle body.

2. The cross-arm welding device according to claim 1, characterized in that: The second row of rollers (211) of the main vehicle body (201) are connected in series via a connecting rod (212); a first motor (213) is provided on the main vehicle body (201); the first motor (213) is connected via a transmission mechanism (214) and drives the connecting rod (212) to rotate.

3. The cross-arm welding device according to claim 2, characterized in that: Connecting members (300) are symmetrically provided on two side surfaces of the front end of the protruding portion (203) of the auxiliary vehicle body (202); the connecting member (300) comprises a first cavity (301) and a second cavity (302) that are interconnected; an extrusion block (303) is slidably provided in the first cavity (301), and an insertion rod (304) is slidably provided in the second cavity (302); the volume of the first cavity (301) is greater than the volume of the second cavity (302); and a first return spring (305) is provided in the first cavity (301) for acting on the extrusion block (303).

4. The cross-arm welding device according to claim 3, characterized in that: A strip groove (400) is provided on the side surface between adjacent protrusions (203) of the main vehicle body (201); a screw rod (401) is provided in the strip groove (400); a slide seat (402) is threadedly connected to the screw rod (401); a socket (403) for inserting the insertion rod (304) is provided on the slide seat (402); a first bevel gear (404) movable along an axial keyway is provided at one end of the screw rod (401); a second bevel gear (405) is provided on the connecting rod (212); a movable baffle (406) is provided on the slide seat (402), and the baffle (406) has a trapezoidal end portion (407) for squeezing the first bevel gear (404).

5. The cross-arm welding device according to claim 4, characterized in that: A second return spring (408) is provided between the baffle (406) and the slide seat (402); and the first bevel gear (404) is connected to a third return spring (409) for disengaging the first bevel gear (404) from the second bevel gear (405).

6. The cross-arm welding device according to claim 1, characterized in that: The base (101) is rotatably mounted on the ground or a mobile platform, the longitudinal arm (102) is vertically mounted above the base (101), and the transverse arm (103) is horizontally mounted on the longitudinal arm (102) and arranged perpendicularly to the longitudinal arm (102).

7. The cross-arm welding device according to claim 1 or 6, characterized in that: The driving member (104) includes a longitudinal arm driving assembly (107) and a transverse arm driving assembly (108), both of which adopt drag chain transmission. The longitudinal arm driving assembly (107) drives the longitudinal arm (102) to move along the base (101), and the transverse arm driving assembly (108) drives the transverse arm (103) to move along the longitudinal arm (102).

8. The cross-arm welding device according to claim 1, characterized in that: The welding head (105) is mounted on a multi-claw chuck (109) provided at one end of the cross arm (103), and the wire feeder (106) is mounted on the cross arm (103) at one end of the welding head (105).

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