Long part tail lap joint welding tool

Abstract

The utility model discloses a long part tail lap joint welding tool, which relates to the technical field of welding tool equipment, and comprises a tool frame, a transition part arranged on the tool frame, and a positioning and supporting assembly arranged on the tool frame and used for completing bearing and positioning of a workpiece, the lateral clamping assembly is arranged on the tool frame and used for completing lateral clamping and positioning of the workpiece; the long part tail lap joint welding tool is suitable for various types of suspended structure workpieces with large size differences, and the universality and the modularization level of the tool are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of welding tooling equipment technology, specifically to a welding tooling for overlapping the tail of a long part. Background Technology

[0002] In the manufacturing process of load-bearing machinery and equipment, suspended structural components such as beams and booms are common and important parts, widely used in various applications requiring high-strength loads. These parts need to bear significant weight during use and must possess good structural stability to prevent deformation or damage under stress.

[0003] Currently, when machining and welding these types of parts, the rear-forward position is often chosen as the fixing point. However, due to the irregular structure of this area and the lack of obvious positioning reference points or flat positioning surfaces, positioning during welding is difficult, thus affecting welding quality and assembly accuracy. To improve efficiency and machining consistency, existing processes typically use dedicated welding fixtures for auxiliary fixing. However, these welding fixtures are mostly custom-designed, only suitable for a specific type of part, lacking versatility for multiple parts with significant differences in size and shape. Furthermore, since the batch production volume of these large parts fluctuates greatly, if each part requires a separate fixture, not only will production costs increase significantly, but it will also result in a large waste of tooling materials. This reduces manufacturing flexibility and restricts the economy and automation level of equipment manufacturing. Therefore, there is still considerable room for improvement in the adaptability and resource utilization of existing tooling. Utility Model Content

[0004] The purpose of this utility model is to provide a welding fixture for overlapping the tail of a long part, thereby solving the problems existing in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a welding fixture for overlapping the tail of an elongated part, comprising:

[0006] Tool rack;

[0007] Transition components mounted on the tooling frame;

[0008] A positioning support assembly installed on a tooling frame to receive and position the workpiece;

[0009] A lateral clamping assembly installed on the tooling frame for clamping and positioning the workpiece laterally.

[0010] Preferably, the transition component includes a transition plate and a transition base, the transition plate being detachably connected to the tooling frame, and the transition base being detachably mounted on the transition plate.

[0011] Preferably, the positioning support assembly is disposed on the transition plate and the transition base, and the lateral clamping assembly is also disposed on the transition plate and the transition base.

[0012] Preferably, the positioning support assembly includes a support slide rail, a slider, and a positioning screw. The support slide rail is respectively disposed on the transition plate and the transition base, the slider is slidably connected to the support slide rail, and the positioning screw is threadedly connected to the slider.

[0013] Preferably, the supporting slide rail is provided with a T-shaped groove on the side near the transition plate or transition base, and the slider has an inverted T-shaped cross section and slides into the groove.

[0014] Preferably, the lateral clamping assembly includes a mounting base, a screw, a top block, a handle, an angle bracket, and a support block, wherein the mounting base is fixed on a transition plate or transition base, the screw is threaded to the mounting base and extends along the clamping direction, and the top block is disposed at the end of the screw near the workpiece.

[0015] Preferably, the corner bracket is mounted on a transition plate or transition base on the other side, the support block is disposed on the corner bracket and located on the side of the workpiece, and the top block is disposed opposite to the support block to clamp the workpiece.

[0016] Preferably, the support block has a guide surface on the side near the workpiece to limit the lateral displacement of the workpiece.

[0017] Preferably, it also includes a traveling tooling assembly, which includes a connecting part, a positioning part, and a guiding part, wherein the connecting part is used to connect with the workpiece, the positioning part contacts the positioning support assembly, and the guiding part contacts the workpiece to achieve guiding and positioning.

[0018] Preferably, the accompanying tooling assembly achieves a stable connection with the workpiece through the connecting part, and increases the contact area with the workpiece through the guide part to improve clamping stability.

[0019] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0020] This fixture, by incorporating a detachable transition plate and base, allows for quick replacement and adjustment of the positioning support assembly and lateral clamping assembly to meet the needs of different parts. It adapts to various types and sizes of suspended workpieces, significantly improving the versatility and modularity of the tooling. The positioning support assembly uses a slider and T-slot combination structure, combined with positioning screws inserted into the workpiece positioning holes, to achieve precise longitudinal and lateral positioning. The slider structure is also easy to adjust, facilitating the installation of workpieces of different lengths and improving workpiece positioning accuracy. The lateral clamping assembly features a screw, top block, and corresponding support block, working in conjunction with an angle bracket structure to achieve double-sided clamping. Manual operation is convenient, and the clamping force is reliable, effectively ensuring the smooth welding process of the workpiece. To ensure positional stability during the process and prevent welding deviations caused by workpiece offset, the support slide rails are respectively set on the transition plate and the transition base, with the transition plate side slide rails being longer, providing a larger contact area. This is particularly suitable for supporting and positioning large-sized workpieces, improving load-bearing capacity and support stability. Each component is detachable or adjustable through screwing, sliding, or surface contact, facilitating batch assembly and disassembly / replacement, reducing the frequency of repetitive manufacturing of special tooling, saving manufacturing costs and reducing material waste. The accompanying tooling components are connected to the workpiece through the connecting part, the guide part achieves large-area contact, and the positioning part cooperates with the positioning support components to further improve the stability and consistency of the overall assembly process and ensure welding positioning accuracy. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a partial structural diagram of the present utility model.

[0023] In the diagram: 1. Tail tooling frame; 2. Transition component; 3. Positioning support assembly; 4. Lateral clamping assembly; 5. Accompanying tooling assembly; 201. Transition plate; 202. Transition base; 301. Support slide rail; 302. Slider; 303. Positioning screw; 304. Slide groove; 401. Mounting seat; 402. Screw; 403. Top block; 404. Handle; 405. Angle seat; 406. Support block; 501. Connecting part; 502. Positioning part; 503. Guide part. Detailed Implementation

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

[0025] like Figures 1-2As shown, a welding fixture for overlapping the tail of an elongated part includes: a fixture frame 1; a transition component 2 disposed on the fixture frame 1; a positioning support component 3 disposed on the fixture frame 1 for receiving and positioning the workpiece; and a lateral clamping component 4 disposed on the fixture frame 1 for clamping and positioning the workpiece laterally.

[0026] In this embodiment, the welding fixture for the lap joint of the long part uses fixture frame 1 as an overall structural support platform, providing a stable foundation for the entire welding process. Transition component 2, located on fixture frame 1, is used to achieve geometric transition or positional adjustment between the tail of the long part and other components, ensuring precise consistency of the parts at the lap joint position. Positioning support component 3 provides longitudinal support and initial positioning; its support points are designed according to the workpiece dimensions to ensure stable placement of the workpiece along its length. Lateral clamping component 4 works in conjunction, primarily applying clamping force in the lateral direction of the workpiece while simultaneously achieving precise positioning, preventing displacement due to thermal deformation or vibration during welding. Through the synergistic effect of these components, the workpiece is in an accurate and stable state before lap welding, improving the accuracy and efficiency of the welding operation.

[0027] This tooling has a clear structure and reasonable layout, enabling efficient positioning and clamping of long parts before lap welding. The synergistic effect of the positioning support component 3 and the lateral clamping component 4 not only improves the accuracy of workpiece positioning but also significantly reduces the risk of workpiece misalignment caused by welding, thus ensuring consistent weld quality. Simultaneously, the transition component 2 enhances the tooling's adaptability to parts of different sizes or structures, improving its versatility and flexibility. The overall structure is reusable, reducing tooling change and adjustment time, thereby improving production efficiency and reducing costs.

[0028] In the above embodiments, the tooling frame 1 can be made of aluminum alloy profiles, stainless steel structural components, or high-strength composite materials to meet the strength and weight requirements under different usage environments; the transition component 2 can adopt an adjustable mechanism design, such as a slide rail or rotating bracket structure, to adapt to tail overlap parts of different angles and shapes; the support position of the positioning support component 3 can be adjusted by a slider or pin structure to adapt to long workpieces of different lengths; the lateral clamping component 4 can be replaced by a pneumatic clamping device, a manual screw clamp, or a hydraulic clamping unit, which can be flexibly selected according to the degree of production automation and workpiece shape requirements. In addition, the installation method of all components can be modularly adjusted according to the factory site layout to achieve rapid installation, adjustment, and maintenance, enhancing the on-site adaptability and maintenance convenience of the tooling.

[0029] The transition component 2 includes a transition plate 201 and a transition base 202. The transition plate 201 is detachably connected to the tooling frame 1, and the transition base 202 is detachably mounted on the transition plate 201. In this embodiment, the transition component 2 is specifically detailed as a combined structure consisting of the transition plate 201 and the transition base 202. The transition plate 201 is detachably fixed to the tooling frame 1, usually using bolts, nuts, or quick-release pins. Its main function is to serve as an intermediate connecting layer, providing a stable mounting surface for the transition base 202. The transition base 202 is further mounted on the transition plate 201, also typically using a detachable connection, enabling the entire transition component to be quickly assembled and replaced. This structural design facilitates the replacement or adjustment of the installation position or shape of the transition base 202 according to the geometry or processing requirements of different elongated parts, achieving flexible and efficient positioning and matching, thereby ensuring the geometric consistency and spatial alignment accuracy of the overlapping parts at the tail of the workpiece, providing a precise reference for subsequent welding operations. This structure enhances the modularity and adaptability of the tooling. By designing the transition component 2 as a detachable structure consisting of a transition plate 201 and a transition base 202, users can quickly replace or adjust the transition base 202 according to the size and structural requirements of different workpieces, significantly improving the versatility and adaptability of the tooling. Furthermore, the detachable connection facilitates maintenance, inspection, and component replacement, reducing equipment maintenance costs and extending service life. The modular design of the transition base 202 also allows for mass production based on standardization principles, reducing customization costs, improving production efficiency, and ultimately enhancing the consistency of welding processes and product quality.

[0030] In the above embodiments, the transition plate 201 can be made of high-strength aluminum alloy, carbon steel, or stainless steel to meet the usage requirements under different environmental and load conditions. Its connection method can be replaced with quick-lock buckles, magnetic suction mechanisms, or other faster assembly methods to improve loading and unloading efficiency. The structure of the transition base 202 can be customized according to the shape of the specific overlapping part, such as a flat surface, an arc surface, or a structure with positioning pins, to improve the geometric matching with the tail of the workpiece. Multiple preset hole positions can also be provided to adapt to workpieces of different sizes by adjusting the installation position. If a higher degree of automation is required, the transition base 202 can also be equipped with sensors or guide components to automatically identify the workpiece and perform fine-tuning positioning. Furthermore, the transition plate 201 and the transition base 202 can also be connected via a slide rail or rotating structure to achieve rapid angle adjustment, further expanding application flexibility.

[0031] The positioning support assembly 3 is mounted on the transition plate 201 and the transition base 202, and the lateral clamping assembly 4 is also mounted on the transition plate 201 and the transition base 202. In this embodiment, both the positioning support assembly 3 and the lateral clamping assembly 4 are arranged on the transition plate 201 and the transition base 202. This structure optimizes the overall assembly and the integrated positioning capability. The transition plate 201 provides a stable bearing surface as the structural foundation, while the transition base 202, through its detachability and shape customization, constructs an installation area that conforms to the specific tail shape of the workpiece. The positioning support assembly 3, by being mounted on this combined structure, achieves precise support and initial positioning of the workpiece in the longitudinal and vertical directions; while the lateral clamping assembly 4, also arranged on the same platform, acts on the lateral side of the workpiece through a clamping mechanism (such as a screw clamp, a cylinder pushing device, etc.) to achieve clamping and limiting in the horizontal direction. This layout enhances the centralization of positioning and clamping operations, contributes to the compactness of the tooling structure and the consistency of positioning accuracy, thereby improving overall assembly efficiency and welding quality.

[0032] By uniformly mounting the positioning support assembly 3 and the lateral clamping assembly 4 on the transition plate 201 and the transition base 202, the welding preparation process can be effectively modularized, reducing positional deviations between components and improving assembly consistency and positioning accuracy. Simultaneously, this structure simplifies the tooling adjustment process; when changing parts of different sizes or structures, only the transition base 202 needs to be replaced, and the support and clamping structures are adjusted simultaneously, making operation simple and quick. Furthermore, the unified arrangement helps control manufacturing tolerances, improves the stability and reusability of the entire system, and enhances equipment reliability and production efficiency.

[0033] In this embodiment, the positioning support component 3 can adopt an adjustable support base structure, achieving fine-tuning of height and position through screw adjustment, slide rail movement, or hydraulic lifting, adapting to parts with different tail structures. The lateral clamping component 4 can be selected from different structural forms such as pneumatic clamps, hydraulic clamps, or electric grippers according to the clamping force requirements, and can also be designed as a multi-point clamping method to enhance stability. The connection between the transition plate 201 and the transition base 202 can be designed as a quick-change slot structure, so that the positioning and clamping components do not need to be completely disassembled when changing the base, but only need to be integrated by partial adjustment. At the same time, the positioning support component 3 and the lateral clamping component 4 can also be designed as a sliding module, allowing movement and adjustment on a fixed track, improving positioning flexibility and module versatility to adapt to the geometric requirements and process paths of different workpieces.

[0034] The positioning support assembly 3 includes a support slide rail 301, a slider 302, and a positioning screw 303. The support slide rail 301 is respectively mounted on the transition plate 201 and the transition base 202. The slider 302 is slidably connected to the support slide rail 301, and the positioning screw 303 is threadedly connected to the slider 302. In this embodiment, the positioning support assembly 3 constitutes an adjustable support positioning system. The support slide rail 301 is installed on the transition plate 201 and the transition base 202, forming a guide rail reference for the workpiece support assembly. The slider 302 is connected to the support slide rail 301 by sliding, realizing mobility in the slide rail direction, which can be flexibly adjusted according to the workpiece length or positioning point position. The positioning screw 303 is threadedly connected to the slider 302, and the support height or clamping force of the workpiece can be finely adjusted by rotating the positioning screw 303. This structure not only improves the flexibility of the positioning support assembly in terms of installation position, but also achieves precise setting of the workpiece positioning point through fine adjustment function, ensuring the stability of the overlapping position, thereby effectively meeting the high precision requirements of the welding process.

[0035] This structure modularizes the positioning and support functions and introduces a combined adjustment mechanism of slide rail, slider, and screw, giving the entire system a high degree of freedom of adjustment and good stability. The slider 302 can move at any position along the slide rail 301, quickly adapting to long workpieces of different lengths or structural features, while the fine-tuning capability of the positioning screw 303 ensures precise setting of the workpiece support point, effectively avoiding the impact of uneven support or positioning errors on welding quality. This design helps improve operating efficiency, reduce debugging time, and decrease the frequency of tooling changes, thus enhancing economy and versatility.

[0036] In alternative solutions, the support slide rail 301 can adopt different forms such as dovetail groove structure, T-slot track, or ball bearing guide to adapt to different strength and precision requirements. The slider 302 can be replaced with a slide assembly with a locking structure, which can be quickly fixed or released via a lever or quick-lock mechanism. The positioning screw 303 can also be replaced with a fine-tuning screw, spring-loaded bolt, or a precision adjustment mechanism with scale indication to improve adjustment efficiency and accuracy. For higher automation requirements, the positioning system can also be configured with servo motor-controlled electric sliders and electric screws to achieve CNC positioning and remote adjustment functions. This structure can also be linked with a sensor system to achieve automatic workpiece identification and adaptive positioning of support points, thereby further enhancing the intelligence level and ease of operation of the equipment.

[0037] A T-shaped groove 304 is provided on the side of the support slide rail 301 near the transition plate 201 or transition base 202. The slider 302 has an inverted T-shaped cross-section and slides into the groove 304. This embodiment further optimizes the structural connection between the support slide rail 301 and the slider 302. By providing a T-shaped groove 304 on the side of the support slide rail 301 near the transition plate 201 or transition base 202, a precision guide channel is formed. The slider 302 is designed with an inverted T-shaped cross-section, which fits into the T-shaped groove 304 and can slide smoothly within the groove. This structure ensures that the slider 302 can be adjusted and moved while effectively preventing it from coming off the outside of the slide rail, enhancing the stability and anti-displacement capability of the slider during positioning. Through this connection method, the slider 302 can be precisely slid and adjusted along the support slide rail 301, and locked by the positioning screw 303 after adjustment, thereby achieving high-precision setting of the support position of long parts and improving the structural reliability and repeatability of the overall clamping system. The combination of a T-shaped groove 304 and an inverted T-shaped slider 302 significantly improves the mechanical strength and stability of the support mechanism, especially during prolonged use or when bearing heavy workpieces, effectively preventing positioning misalignment caused by loosening or sliding errors. Simultaneously, this embedded structure possesses excellent tensile and shear resistance, allowing for smoother slider adjustment and precise control of the movement path, facilitating rapid positioning and repetitive, precise operations. The overall structure is compact and easy to assemble, suitable for mass production and high-precision processes, enhancing the reliability and applicability of the entire tooling system.

[0038] In the modified design, the T-shaped groove 304 can be selected from U-shaped grooves, V-shaped grooves, or double guide grooves according to the actual processing technology, suitable for different strength and positioning accuracy requirements; the cross-section of the slider 302 can also be adjusted to a dovetail shape, a rectangular shape with limiting flanges, or a roller-embedded rail structure to improve wear resistance and smoothness of adjustment. To improve automation, an automatic cleaning structure or lubrication device can be added between the T-shaped groove and the slider to maintain smooth sliding and extend service life. In some high-end applications, high-precision rolling guides can be used to replace the traditional T-shaped structure to further improve positioning accuracy and service life. In addition, the slider locking mechanism can be replaced with a quick-lock handle, a pneumatic clamping mechanism, or a CNC locking system with a scale to improve adjustment efficiency and adapt to different production cycle requirements.

[0039] The lateral clamping assembly 4 includes a mounting base 401, a screw 402, a top block 403, a handle 404, a corner bracket 405, and a support block 406. The mounting base 401 is fixed to the transition plate 201 or the transition base 202. The screw 402 is threadedly connected to the mounting base 401 and extends along the clamping direction. The top block 403 is located at the end of the screw 402 near the workpiece. This embodiment constructs a lateral clamping system containing multiple functional components, enabling reliable clamping and positioning of the workpiece in the lateral direction. The mounting base 401, as a basic fixing assembly, is firmly connected to the transition plate 201 or the transition base 202, providing stable support for the entire lateral clamping mechanism. The screw 402 is threadedly mounted to the mounting base 401, extends along a preset clamping direction, and uses a helical drive to achieve linear advance or retraction, thereby driving the top block 403 to move or release towards the side of the workpiece. When the operator rotates the handle 404, the screw 402 rotates accordingly, and the top block 403 is pushed forward, gradually approaching and pressing against the side wall of the workpiece, thereby completing the clamping action. The corner seat 405 and the support block 406 cooperate to provide an auxiliary support structure to stabilize the lateral reaction force generated during the clamping process and prevent structural deformation or vibration from affecting the clamping stability.

[0040] This lateral clamping assembly features a clear structure and flexible adjustment. A mechanical screw drive mechanism enables manual operation and controllable adjustment of the clamping force. The linear transmission mechanism of the screw 402 ensures a gradual and stable clamping process, preventing workpiece displacement caused by instantaneous clamping and improving the tooling clamping accuracy. The top block 403 directly contacts the workpiece, and its shape can be optimized for different workpiece edge structures to ensure uniform force distribution. The modular design of the overall clamping assembly facilitates maintenance, replacement, or upgrades, effectively extending the equipment's service life and operational convenience. The corner bracket 405 and support block 406 further enhance the system's rigidity and stability during clamping, preventing structural vibration or clamping failure and improving the safety and reliability of the clamping process.

[0041] In the alternative structure, the screw 402 can be replaced with a quick-release thread structure or a gear transmission mechanism to improve clamping response speed; the handle 404 can also be designed as a foldable, ratchet, or electric knob structure to achieve a more efficient operating experience. The material and shape of the top block 403 can be optimized according to the workpiece material and surface structure, for example, it can be made of rubber coating, hard alloy, or stainless steel, and can be set with spherical, flat, or V-shaped pressure surfaces to adapt to different workpiece cross-sections. The corner seat 405 can also adopt an angle-adjustable structure, and the support block 406 can be integrally formed with the corner seat or equipped with a buffer elastic element to improve the absorption and buffering capacity of clamping force. In addition, this clamping system can be integrated into an automated tooling system to achieve automatic clamping control through electric push rods or cylinders, which is suitable for mass production or unmanned operation scenarios.

[0042] An angle bracket 405 is mounted on a transition plate 201 or transition base 202 on the other side. A support block 406 is disposed on the angle bracket 405 and located on the side of the workpiece. A top block 403 is disposed opposite to the support block 406 to clamp the workpiece. In this embodiment, the structure of the lateral clamping assembly 4 is further optimized to form a complete clamping alignment system. The angle bracket 405 is mounted on the transition plate 201 or transition base 202 opposite to the side where the top block 403 is located, serving as the basic support body of the support mechanism. The support block 406 is fixed on the angle bracket 405 and is located on the side of the workpiece to provide a clamping reaction surface. When the operator rotates the handle 404 to drive the screw 402 to rotate, the top block 403 gradually moves forward until it presses against the support block 406 to clamp the workpiece, completing the clamping process. In this structure, the top block 403 and the support block 406 act on both sides of the workpiece, forming a stable and reliable clamping force path. This prevents the workpiece from shifting laterally during welding due to thermal expansion, vibration, or operational disturbances, thus ensuring the alignment and fixation of the lap welding area. By placing the support block 406 on the corner seat 405 installed on the opposite side, a symmetrical and stable clamping structure is formed, achieving force balance and precise positioning during lateral clamping of the workpiece. This structure improves the overall mechanical stability of the clamping system, reduces the risk of workpiece warping or slippage caused by clamping deviation, and effectively ensures the consistency and structural quality of the weld in the lap area. Simultaneously, the corner seat 405 and the support block 406 are independent and detachable structures, facilitating maintenance, replacement, or quick adjustment of the clamping point position for different workpieces, enhancing the adaptability and ease of operation of the tooling system. This design is applicable to the tail structures of various long parts, possessing good versatility and engineering application value.

[0043] In a modified embodiment, the corner bracket 405 can adopt an angle-adjustable structure to achieve fine-tuning of the angle between the support block 406 and the workpiece side, adapting to irregular or inclined workpiece surfaces. The support block 406 can employ various contact surface designs, such as V-grooves, arc surfaces, or nested rubber pads, to improve the fit with workpieces of different cross-sectional shapes. To adapt to different clamping strength requirements, the corner bracket 405 can also be made of high-strength alloy materials or an integral casting structure to enhance stability. The distance between the top block 403 and the support block 406 can be quickly adjusted by adjusting the guide rail or telescopic connector. Furthermore, in automated scenarios, the corner bracket where the support block 406 is located can integrate a force sensor or displacement detection module to monitor the clamping status and link with the main control system, improving the intelligence and safety level of the clamping operation.

[0044] A guide surface is provided on the side of the support block 406 near the workpiece to limit the lateral displacement of the workpiece. In this embodiment, the structural design of the support block 406 is further enhanced. By providing a guide surface on the side near the workpiece, it not only provides support against clamping forces but also undertakes the guiding and positioning function to limit the lateral displacement of the workpiece. The guide surface can be a vertical surface, an inclined surface, or a precision-machined surface with a groove structure, and its geometry is optimized according to the edge contour of the workpiece. When the workpiece is placed in the fixture and pressed by the top block 403, one side of the workpiece is in contact with the guide surface, and the guide surface applies a reverse constraint force to the workpiece, thereby preventing the workpiece from sliding or shifting laterally during the welding process and ensuring that the position of the overlapping area is always accurate and consistent. This guide structure works in conjunction with the clamping force to form a stable three-point support system, improving positioning accuracy and structural reliability. This design adds a lateral limiting function while maintaining clamping stability, further improving the reliability and repeatability of the workpiece during the positioning process. The guide surface ensures that the workpiece can always maintain the correct position during the welding process, and even when subjected to thermal expansion, vibration, or other disturbances, it can effectively suppress its lateral displacement, thereby improving the alignment accuracy of the welded joint and the weld quality. As a passive limiting structure, the guide surface does not require an additional control system. It has a simple structure, is easy to manufacture, and is suitable for long parts of various sizes and structural types. It has good adaptability and engineering practical value.

[0045] In the deformation scheme, the guide surface can be configured as a replaceable module, allowing for quick replacement of guide contact surfaces of corresponding shapes, such as straight-edge, V-groove, or arc-shaped structures, according to different workpiece structures. The guide surface angle can also be changed via a rotation adjustment structure or a pin structure to adapt to irregularly shaped workpieces. The guide surface material can be wear-resistant steel, stainless steel, or metal materials with an engineering plastic coating to improve durability and protect the workpiece surface. For further enhancement of the limiting effect, magnetic materials or micro-buffer components can be embedded in the guide surface to attract and buffer the displacement impact of the workpiece during clamping. Simultaneously, this guide structure can also integrate a displacement detection sensor to monitor and alarm the lateral positioning status of the workpiece, enhancing the operational safety and intelligence level of the system.

[0046] The system also includes a traveling tooling assembly 5, which comprises a connecting part 501, a positioning part 502, and a guiding part 503. The connecting part 501 is used to connect with the workpiece, the positioning part 502 contacts the positioning support assembly 3, and the guiding part 503 contacts the workpiece to achieve guiding and positioning. In this embodiment, to improve clamping accuracy and operational flexibility, a traveling tooling assembly 5 is provided, which moves in tandem with the workpiece and assists in positioning. The connecting part 501 serves as the connection interface between the tooling and the workpiece and can be fastened to the tail of the workpiece by screws, pins, or magnetic attraction to achieve rigid or semi-rigid coupling between the traveling assembly and the workpiece. The positioning part 502 contacts the positioning support assembly 3 on the tooling body, forming a clamping reference point through physical contact to achieve spatial calibration for initial alignment operations. The guiding part 503 directly contacts the side or bottom of the workpiece and is typically designed as an arc surface, V-shaped surface, or roller structure. It uses the contact surface or rolling method to control the directional deviation of the workpiece during movement or assembly, thereby keeping the workpiece running within the guide trajectory or path. This accompanying tooling component, by moving synchronously and cooperating with the workpiece, not only makes up for the shortcomings of static tooling in the alignment of complex structures, but also provides flexible auxiliary alignment capabilities, making it particularly suitable for lap welding scenarios where the workpiece shape is complex or the position changes frequently.

[0047] The accompanying tooling assembly of this invention significantly improves the efficiency and accuracy of workpiece placement and positioning within the tooling through a sophisticated combination of connection, positioning, and guiding modules. The connecting part 501 provides a stable bonding force, enabling the accompanying structure to accurately follow the workpiece movement; the positioning part 502, together with existing positioning support components, forms an auxiliary positioning system, improving stability and centering accuracy during clamping; the guiding part 503 provides workpiece movement path guidance, effectively preventing error accumulation or deviation expansion, thereby improving overall welding consistency and automation levels. This structure is suitable for high-precision welding applications and possesses excellent adaptability, modularity, detachability, and reusability, helping to reduce costs and increase manufacturing cycle time.

[0048] The accompanying tooling assembly 5 achieves a stable connection with the workpiece through the connecting part 501, and the guide part 503 increases the contact area with the workpiece to improve clamping stability. In this embodiment, the function of the accompanying tooling assembly 5 is further enhanced. The connecting part 501, as the fixing structure between the tooling and the workpiece, adopts a high-strength connection method, such as threaded fastening, quick-lock structure, or precision-fitting plug-in mechanism, to ensure that the accompanying tooling maintains a stable and reliable connection with the workpiece throughout the entire operation, avoiding relative slippage or positional displacement. The guide part 503 not only undertakes the task of controlling the workpiece's movement path, but also expands its contact area with the workpiece, forming a larger support surface or guide interface, thereby enhancing friction, dispersing stress, and improving clamping stability during clamping or movement. Expanding the contact area can be achieved by designing a flat pressure plate, wide guide rail, flexible surface, or roller assembly structure, effectively suppressing clamping slippage or uneven force caused by insufficient contact points, and ensuring the workpiece's positioning is maintained before and during welding.

[0049] Working process: Place the fixture 1 on a flat working platform and fix it securely with bolts or positioning blocks. According to the structural characteristics and tail overlap shape of the workpiece to be processed, select a suitable transition plate 201 and transition base 202 from the preset transition components 2, and install the transition plate 201 on the fixture 1. The transition base 202 is then detachably installed on the transition plate 201, completing the initial construction of the fixture structure.

[0050] Support rails 301 are arranged on the transition plate 201 and the transition base 202 respectively. The slider 302 is inserted into the T-shaped groove 304 by sliding, and the position of the slider 302 is adjusted according to the length of the workpiece. Then, the positioning screw 303 is tightened to accurately set the height of the slider 302 so that it becomes the reference point for supporting the long workpiece, thereby completing the longitudinal and vertical positioning.

[0051] The long part is gently placed on the positioning support assembly 3, so that its tail end overlaps in the preset welding area, and one side of the workpiece is against the guide surface of the support block 406, which initially restricts its lateral movement.

[0052] Ensure the lateral clamping assembly 4 is correctly installed on the transition plate 201 or transition base 202. Rotate the handle 404 to rotate the screw 402 within the mounting base 401, thereby pushing the top block 403 towards the workpiece. When the top block 403 clamps the workpiece against the support block 406 located on the other side of the workpiece, a stable and reliable lateral fixation is formed. The corner seat 405 serves as the mounting base for the support block 406, providing reaction force support during clamping.

[0053] If the process requirements are high, the operator can install the accompanying tooling component 5. Its connecting part 501 achieves a rigid or semi-rigid connection with the workpiece, the positioning part 502 forms an auxiliary alignment contact with the positioning support component 3, and the guide part 503 fits against the workpiece surface and expands the contact area to enhance positioning stability and prevent movement deviation.

[0054] Once the workpiece is reliably positioned and clamped in multiple directions by the positioning support assembly 3 and the lateral clamping assembly 4, the tail lap welding operation can be performed. After welding is completed, rotate the handle 404 to loosen the screw 402 in the opposite direction, release the clamping force of the top block 403, remove the workpiece, and complete one welding operation.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A welding fixture for overlapping the tail of an elongated part, characterized in that, include: Tool rack (1); Transition component (2) is installed on tooling frame (1); A positioning support assembly (3) is installed on the tooling frame (1) for receiving and positioning the workpiece; A lateral clamping assembly (4) is installed on the tooling frame (1) for clamping and positioning the workpiece laterally.

2. The welding fixture for overlapping the tail of an elongated part according to claim 1, characterized in that: The transition component (2) includes a transition plate (201) and a transition base (202). The transition plate (201) is detachably connected to the tooling frame (1), and the transition base (202) is detachably installed on the transition plate (201).

3. The welding fixture for overlapping the tail of an elongated part according to claim 2, characterized in that: The positioning support assembly (3) is disposed on the transition plate (201) and the transition base (202), and the lateral clamping assembly (4) is also disposed on the transition plate (201) and the transition base (202).

4. The welding fixture for overlapping the tail of an elongated part according to claim 3, characterized in that: The positioning support assembly (3) includes a support slide rail (301), a slider (302), and a positioning screw (303). The support slide rail (301) is respectively set on the transition plate (201) and the transition base (202). The slider (302) is slidably connected to the support slide rail (301), and the positioning screw (303) is threadedly connected to the slider (302).

5. The welding fixture for overlapping the tail of an elongated part according to claim 4, characterized in that: The support slide rail (301) is provided with a T-shaped groove (304) on the side near the transition plate (201) or transition base (202), and the slider (302) has an inverted T-shaped cross section and slides into the groove (304).

6. The welding fixture for overlapping the tail of an elongated part according to claim 1, characterized in that: The lateral clamping assembly (4) includes a mounting base (401), a screw (402), a top block (403), a handle (404), a corner seat (405), and a support block (406). The mounting base (401) is fixed on the transition plate (201) or the transition base (202). The screw (402) is threaded to the mounting base (401) and extends along the clamping direction. The top block (403) is located at the end of the screw (402) near the workpiece.

7. The welding fixture for overlapping the tail of an elongated part according to claim 6, characterized in that: The corner bracket (405) is mounted on the transition plate (201) or transition base (202) on the other side, the support block (406) is set on the corner bracket (405) and located on the side of the workpiece, and the top block (403) is arranged opposite to the support block (406) to clamp the workpiece.

8. A welding fixture for overlapping the tail of an elongated part according to claim 6 or 7, characterized in that: The support block (406) has a guide surface on the side near the workpiece to limit the lateral displacement of the workpiece.

9. The welding fixture for lap jointing the tail of an elongated part according to claim 1, characterized in that, It also includes a traveling tooling assembly (5), which includes a connecting part (501), a positioning part (502) and a guiding part (503), wherein the connecting part (501) is used to connect with the workpiece, the positioning part (502) contacts the positioning support assembly (3), and the guiding part (503) contacts the workpiece to achieve guiding and positioning.

10. The welding fixture for overlapping the tail of an elongated part according to claim 9, characterized in that: The accompanying tooling assembly (5) achieves a stable connection with the workpiece through the connecting part (501), and increases the contact area with the workpiece through the guide part (503) to improve clamping stability.

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