40results about How to "Avoid Welding Defects" patented technology

The invention discloses a control method of an automatic welding robot and an electrical structure system, and relates to the technical field of electrical control. In order to solve the technical problems that in the prior art, when an existing welding robot deals with a complex welding task, welding path planning, welding current control, temperature adjustment, parameter self-adaptability, welding process monitoring and other aspects are insufficient, the technical scheme is provided, and the invention provides a control method of an automatic welding robot. Comprising the following steps that 1, physical property information of a welding material is collected; 2, data processing is conducted on the feature information, and a preliminary welding path and welding parameters are generated; 3, dynamically adjusting a welding path and welding current and voltage according to real-time data in the welding process; and 4, according to the real-time temperature of the monitored welding area, a cooling control signal is adjusted. The method is suitable for control work of the automatic welding robot.

The invention relates to the technical field of five-axis hybrid robot error compensation, in particular to a five-axis hybrid robot tail end pose error compensation method and system. The method comprises the following steps: acquiring vehicle body welding demand data and analyzing the welding strength difference between welding spots; thirdly, the theoretical contact strength of the manipulator is matched according to the welding strength difference data, the heat conduction toughness loss of adjacent welding spots is simulated, and the toughness influence gradient of the heat chain reaction is further recognized; then, carrying out regional gridding processing on the toughness influence gradient data, regulating and controlling the contact force of the manipulator, and learning a tail end pose error compensation strategy; and finally, designing automatic firmware based on the compensation strategy, and embedding the automatic firmware into the bottom layer of the robot to ensure that the tail end pose error is accurately compensated. According to the method, the error compensation technology of the five-axis hybrid robot is optimized, so that the error compensation technology of the five-axis hybrid robot is more perfect.

The invention discloses a welding machining device and method for stainless steel parts, and relates to the technical field of welding. The welding device comprises the bottom rotating disc face, the top rotating disc face, the embedded frame and the three-jaw chucks, the embedded frame and the three-jaw chucks are correspondingly arranged, high-frequency relative friction between stainless steel parts of the second three-jaw chuck and stainless steel parts of the first three-jaw chuck is achieved by shaking the supporting sliding rods and the reset springs, heat is generated, and welding is completed; a balance weight in the balance weight box and centrifugal force generated by rotation provide stable welding pressure, after welding is completed, air is guided to flow through a welding seam for rapid cooling through a negative pressure arc-shaped protruding block and an air guiding channel, a blocking plate is controlled by the centrifugal force and a reset tension spring, automatic switching of air flowing is achieved, the structural design of the device is balanced, and the welding efficiency is improved. And a plurality of parts can be welded simultaneously, so that the production efficiency is improved.

The invention relates to the technical field of steel structure machining, and discloses a steel structure forming machining device with a limiting and fixing structure, the steel structure forming machining device comprises a main body, the top of the main body is fixedly connected with two fixing frames, the interiors of the fixing frames are rotatably connected with threaded lead screws, and the right sides of the threaded lead screws are fixedly connected with a rotating disc. When a C-shaped plate moves, a rotating sleeve rotates, when the rotating sleeve rotates, a moving cylinder is driven to slide towards the interior of a fixed sleeve, when the moving cylinder slides, a second ejector rod expands and ejects a moving plate to move, gas in a long plate is extruded into a gas bag sleeve, and the gas bag sleeve expands; when the rotating sleeve rotates, the expanded air bag sleeve can increase the surface contact area with the steel plate to provide downward pressure for the vertical steel plate, and the vertical steel can be more stably positioned and fixed in the welding process through extrusion friction of the air bag; and the downward pressure is applied, so that the deformation trend caused by thermal stress at the corner in the welding process can be counteracted.

The invention discloses an automatic welding device and method for metal pipelines, and relates to the technical field of automatic welding of the metal pipelines. The automatic welding device and method for the metal pipelines comprise a base and a metal pipeline body, a moving device is arranged on the inner wall of the base, and a frame is slidably mounted on the circumferential surface of the moving device; a motor is fixedly mounted above the frame; the device further comprises a clamping device, a moving device and a cleaning device; wherein the clamping device comprises a placing block, a rotating cylinder, a sliding plate, a first telescopic elastic rod, a first square plate, a second sliding groove, a clamping plate, a mounting plate, a limiting plate, a second telescopic elastic rod and a check block, meanwhile, the clamping plate can adapt to metal pipeline bodies of different sizes to conduct clamping and fixing, the pipeline can be stably fixed, it is ensured that the pipeline cannot move or deform in the welding process, and the welding efficiency is improved. Therefore, accurate butt joint is realized.

The invention discloses welding clamping equipment for steel structure machining, and belongs to the field of steel structure machining. Comprising a transverse plate, a clamping cavity is formed in the upper surface of the transverse plate, extending cavities are symmetrically and fixedly connected to the two sides of the transverse plate, a supporting plate is fixedly connected to the front portion of the lower surface of the transverse plate, an inclined block is fixedly connected to the rear portion of the lower surface of the transverse plate, and a clamping power cavity is fixedly connected to the front surface of the transverse plate; the equipment stably clamps the steel structural part through a complex mechanical transmission structure, the clamping plate can accurately fix the steel structural part in the clamping cavity under driving of the motor, welding defects caused by shaking of the steel structural part in the welding process are avoided, guarantee is provided for high-quality welding through stable clamping, and the welding quality is improved. The welding seam is uniform and firm, the overall strength and stability of the steel structure are greatly improved, and high-quality welding is crucial in the fields of buildings, bridges, mechanical manufacturing and the like.

The utility model relates to tunnel arch frame technical field more specifically, and more specifically, relates to a I -beam follow -up welding device. Including the welding frame subassembly, mobile guide rail and automatic lifting carrier roller, the welding frame subassembly includes the welding fixed frame, welding robot and follow -up mobile wheel, and two groups are provided to the welding fixed frame side -by -side, and the both sides of two welding fixed frames are provided with the rack, and the welding robot is arranged on both sides rack setting, and the welding robot is located between two welding fixed frames, and the bottom of welding fixed frame is provided with follow -up mobile wheel, and the welding fixed frame is set up through follow -up mobile wheel on the mobile guide rail and slides, and the automatic lifting carrier roller is provided with multiple groups in the mobile guide rail. The device significantly reduces the artificial cost and the hidden danger, and the mobile welding does not affect the subsequent process completely, and the beat is optimized, and the overall operation efficiency of the assembly line is improved greatly, and the purpose of reducing the labor cost and improving the industrial efficiency is further reached. The utility model mainly applies to I -beam follow -up welding.

The invention provides a differential friction stir welding method for an aluminum-based material part, and relates to the technical field of friction stir welding of aluminum-based materials. According to the main technical scheme, a set differential friction stir welding tool is adopted, and differential friction stir welding is conducted on an aluminum-based material part to be welded; the differential friction stir welding tool comprises a stirring needle assembly and a shaft shoulder assembly. The stirring needle assembly comprises a stirring needle and a stirring needle connecting handle; the stirring needle is made of tungsten carbide-cobalt alloy; the shaft shoulder assembly comprises a shaft shoulder and a shaft shoulder connecting handle; the shaft shoulder is made of tungsten carbide-cobalt alloy; in the tungsten carbide-cobalt alloy, the content of cobalt is 12-25 wt%. According to the method, the set differential stirring welding tool is utilized, weld nugget reinforced phase particles can be broken, the higher strengthening effect is achieved, coarse grain weld nugget grains are refined, and therefore low-heat-input differential stirring friction welding of the aluminum-based material thick plate can be achieved, coarsening of a weld joint structure is restrained, and the welding quality of the aluminum-based material thick plate is improved. And the mechanical property of the large-thickness structural part joint is obviously improved.

The invention provides a pipeline joint welding system and method, and belongs to the technical field of welding systems. The pipeline joint welding system comprises an automatic welding machine, a carrier loader and an inflation protection assembly, and the inflation protection assembly is used for providing gas protection for the back face of welding work after running to the joint position in a pipeline along with the carrier loader; the welding method comprises the steps that S1, the inflation protection assembly runs to the inner joint of the pipeline; s2, filling protective gas; s3, the automatic welding machine is clamped and fixed; and S4, seam welding is conducted. When the automatic welding machine carries out welding work, protective gas can be inflated into the back face of the welding work to protect the welding work, the protective gas does not need to be inflated into a whole pipeline, use of the protective gas is reduced, and resources are saved; and manual construction in a narrow space can be replaced, the construction efficiency is higher, welding quality fluctuation caused by human factors is reduced, welding defects caused by fatigue of workers are avoided, and the welding quality is higher.

The present invention provides a protective device and method for argon arc welding of gas turbine inserts, including a welding protective tool, wherein the welding protective tool includes a base, a cover plate, an adjusting screw and a bottom pad, wherein the upper end of the base is an arc surface structure, the lower end of the base is connected to the cover plate, and an argon gas channel is provided on the base; one end of the adjusting screw is connected to the lower end of the cover plate; the free end of the adjusting screw is connected to the bottom pad; the present invention utilizes a protective device to ensure an accurate welding position, prevent internal welding defects and welding cracks, and improve labor production efficiency and processing quality.

The present application relates to the technical field of welding process, and discloses an industrial welding device, an industrial welding data acquisition method and system, the device comprising a welding robot, a welding gun is installed, and welding work is performed according to a control instruction; a molten pool detection camera acquires a molten pool image and a timestamp; a laser sensor is installed at a preset position of a mechanical arm of the welding robot, acquires point cloud data and a timestamp; an upper computer transmits a control instruction to the welding robot, acquires a trajectory position and welding current voltage data, and records a timestamp of the trajectory position and welding current voltage data; the welding information and timestamps of the molten pool detection camera, the laser sensor and the welding robot are fused to obtain welding information of the same timeline and visually display the welding information. Through comprehensive recording of key information in the welding process, multi-source data is fused and processed, corresponding to the same timeline and visually displayed, thereby improving the correlation between various data.

The invention relates to the technical field of plasma welding, in particular to a tank and end socket welding method, device and system.The method comprises the steps that welding preparation is conducted, specifically, a tank and an end socket which are fixed through spot welding are hoisted to a welding station, and a bearing mechanism is arranged on the welding station and used for bearing and driving the tank to rotate and restraining the end of the tank; the axial slippage of the tank body is reduced; a welding head is physically calibrated and positioned through an infrared emitter, so that the welding head is aligned with a welding seam to be welded; and welding: starting a plasma welding program, rotating the tank body at a preset rotating speed, driving the tank body to rotate at a constant speed, and welding a welding seam by a welding head until the welding is completed after the tank body rotates for a circle. The device comprises a construction frame, a bearing mechanism, a driving mechanism and a welding mechanism. Manual intervention is reduced, and the welding efficiency and the quality stability are improved; the labor intensity is reduced, and the adjusting efficiency is improved.

This invention relates to a gear welding device and method for a press, belonging to the field of press manufacturing. The technical solution is as follows: A gear welding device for a press includes a work platform with a ground rail. A transfer trolley is movably mounted on the ground rail to carry the gear to be welded. Positioners are mounted on both sides of the ground rail, each equipped with a rotatable gripper. A gantry frame is also mounted on the work platform, spanning the ground rail. A welding robot is movably mounted on the gantry frame, its movement direction being horizontal and perpendicular to the ground rail. The welding robot is equipped with a machine vision module. This solution, through the positioner grippers, can precisely achieve 180° rotation of the gear, providing a stable posture adjustment basis for double-sided welding. The welding robot, combined with the machine vision module, enables automated and high-precision acquisition of weld information, providing data support for intelligent welding path planning.

The utility model relates to a segmented pressure vessel pressure test structure. The segmented pressure vessel pressure test structure comprises a plurality of segmented shells, at least two pressure test end sockets and at least one annular half-tube pressure test tool, a pressure test allowance is reserved at the end part of each segmented shell, a half-pipe pre-welding piece is arranged at the position, close to the end part, of each segmented shell, and the annular half-pipe pressure test tool is configured to be welded on the corresponding half-pipe pre-welding pieces of the two adjacent segmented shells. The segmented pressure vessel pressure test structure can be used for respectively executing a hydraulic pressure test on each segmented shell and a folding welding seam between two adjacent segmented shells after folding welding, and the problems that water filling and water draining of a pressure vessel are difficult and the pressure vessel bears too heavy pressure after water filling are solved.

The present application belongs to the technical field of probe processing, and particularly relates to a novel welding method for a MEMS probe. The novel welding method for the MEMS probe constructs and initializes a digital twin model of core components of the MEMS probe welding, combines a real-time collected synchronous three-dimensional data set and a lightweight agent model, and accurately outputs thermal stress distribution data, so as to early understand the thermal stress change in the welding process, effectively control potential risks, and when the risk condition is determined, the potential root cause can be diagnosed in-depth and the final adjustment suggestion can be generated. The accurate dynamic regulation mechanism enables the welding process to be flexibly optimized according to the real-time working condition, ensures the stable and reliable welding quality, avoids the welding defects caused by the out-of-control thermal stress, greatly improves the yield of the MEMS probe welding, reduces the production cost, and improves the production efficiency.

The application relates to the technical field of welding control, in particular to an alternating-current bus welding parameter self-adaptive regulation and control method based on arc pressure feedback, which comprises the following steps: acquiring the spatial coordinates of defect points in a welded workpiece and the grid brazing rates of each welding grid, and constructing a risk matrix; calculating the weighted grid information entropy of each welding grid according to the risk matrix; calibrating the energy saturation index in the welding process; determining the fuzzy membership degree scaling factor by using the weighted grid information entropy and the energy saturation index, and obtaining a corrected fuzzy controller; inputting a real-time arc pressure signal into the corrected fuzzy controller, outputting the welding power regulation and control instruction of the current welding grid, and dynamically adjusting the welding parameters. The technical scheme of the application can improve the uniformity of the bus overall brazing rate and the welding quality by dynamically adjusting the fuzzy membership degree scaling factor of the fuzzy controller.

The utility model relates to the technical field of saw blade welding, in particular to an alloy tooth saw blade welding machine. The clamping device comprises a mounting table, an operation table arranged at the top of the mounting table, a clamping and limiting mechanism and a first clamping table. The clamping and limiting mechanism is arranged at the top of the mounting table. The first clamping table is arranged on the clamping limiting mechanism. According to the saw blade clamping device, the clamping limiting mechanism is arranged, the positions of the limiting plates are adjusted to adapt to saw blades with different widths, the air cylinder drives the first clamping table and the second clamping table to be matched so as to clamp the saw blades, and the limiting plates are used for limiting the two sides of the saw blades in the clamping process; in this way, the position of the saw blade in the welding process can be accurately controlled, it is guaranteed that welding points are accurate, welding defects caused by saw blade deviation are avoided, errors caused by manual operation are reduced, welding consistency and stability are improved, meanwhile, saw blades of different widths can be clamped, a welding machine has wider applicability, and the welding efficiency is improved. And different production requirements can be met.

The invention relates to the technical field of plasma arc welding, and discloses an alloy steel mechanical part positioning welding device which comprises a welding table and a driving disc arranged on the top face of the welding table, a welding base is fixedly installed at the position, located on the side edge of the driving disc, of the top face of the welding table, and a plasma arc welding gun is arranged at the movable end of the welding base. A plurality of evenly-distributed mounting holes are formed in the top face of the driving disc, and a plurality of supports are arranged on the top face of the driving disc. According to the clamping device, the position of the support is adjusted, a limiting plate and a positioning plate are matched to ensure that the support is coaxially installed in an installation hole, then the support is attached to the outer wall of a workpiece through a spring telescopic rod and a pressing strip, the spring telescopic rod is fixed through a locking frame, and multi-point adaptive clamping can be formed according to the irregular shape of the special-shaped workpiece; meanwhile, due to the angle locking design of the locking cone pulley and the locking cap, deviation of the workpiece in the welding process is avoided, the problem that special-shaped alloy steel accessories are difficult to fix is solved, it is guaranteed that the workpiece is accurately positioned and firmly fixed before welding, and a foundation is laid for high-quality welding.

The present invention discloses an automatic welding device for lifting elevator plates, which relates to the technical field of plate welding, comprising: two supporting legs, workbenches are fixedly installed on the top surfaces of the two supporting legs, baffles are fixedly installed at both ends of the top surface of the workbench, a controller is fixedly installed on one of the baffles, a distribution box is fixedly installed on the side wall of the right supporting leg, support blocks are fixedly installed on the top surfaces of the two baffles, and first support plates are fixedly installed on the top surfaces of the two support blocks; a welding mechanism, the welding mechanism is arranged on the first supporting plate and is located below the moving part, the welding mechanism comprises: a first mechanical arm, in the present invention, through the highly automated and intelligent design of the welding mechanism and the rotating clamping mechanism, not only the efficiency and quality of the welding operation are improved, but also the working environment is improved, the labor cost is reduced, and an efficient and reliable welding solution is provided for the production of lifting elevator plates.

The invention provides a reflow soldering selective temperature control device and method based on neural network PID control, and relates to the technical field of selective temperature control, visual scanning monitoring of distribution of elements with different heat capacities is carried out on a PCB, temperature field data is acquired from visual scanning information, and real-time element size information of a preset key area is extracted; performing control quantity analysis, and outputting the control quantity of the independent temperature control module corresponding to the preset key area; carrying out selective temperature compensation analysis on a preset key area, carrying out selective temperature compensation control according to compensation analysis data, carrying out adjustment analysis on adjustment parameters of a micro heater, carrying out parameter adjustment control on the micro heater according to adjustment analysis data, and obtaining selective temperature control data; dynamic and accurate local temperature compensation can be realized for elements with different heat capacities on the same PCB, so that the temperature difference between the elements is remarkably reduced, and welding defects caused by different heat capacities of large and small elements are avoided.

The present application relates to point row welding machine technical field, especially provide gantry type point row welding machine, including the crossbeam plate of horizontal arrangement, and at least two groups of welding rod components are arranged along the horizontal direction of the crossbeam plate, the welding rod component includes welding electrode rod and elastic buffer assembly, the elastic buffer assembly is installed on the crossbeam plate, and is connected with the welding electrode rod, is used for driving the welding electrode rod along vertical direction elastic float, to adapt to the relief of the surface of the component to be welded, it further includes linkage fine adjustment mechanism, the linkage fine adjustment mechanism is connected between the welding electrode rod of adjacent two groups of welding rod components and the elastic buffer assembly, through the gear rack linkage transmission drive welding electrode rod relative assembly sleeve secondary upward fine adjustment, realize secondary avoidance protection under the condition of excessive convex, adopt linkage and realize the twice overload extrusion of electrode rod Unload effect, simple structure.

The application discloses a laser welding device for chain production and relates to the technical field of laser welding devices.The laser welding device comprises a base;the fixing seat, the mechanical arm, the heating nozzle and the flow guide cover are cooperated, so that the cooling speed of the welding seam is delayed, the welding seam quality and stability are improved, the functions of uniform heating of the welding seam and avoidance of cracking and peeling defects are realized;based on a heat transfer formula, the transmission temperature drop is calculated in real time, and the influences of multiple factors such as the length of the hose, the total heat transfer coefficient and the environment temperature are quantified;when the environment temperature changes beyond a threshold value, the gas flow rate is reversely calculated and adjusted, the heat loss is actively compensated, the outlet temperature of the heating nozzle is stabilized, the consistency of the preheating and the heat preservation of the welding seam is ensured, and the welding defects caused by temperature fluctuation are avoided;through image analysis, the positions of the welding seam and the heating nozzle are accurately determined, the actual distance between the two is calculated in combination with the camera parameters, the synchronous movement of the heating nozzle and the welding device and the collaborative control of the preheating before welding and the heat preservation after welding are realized.

This invention relates to the field of seam welding technology, specifically to a welding device for longitudinal seams of steel drum bodies. The device includes a rolling welding head, an outer diameter positioning roller, and a transfer frame. A curling positioning component, located below the rolling welding head, bends half of the steel plate into a circle and positions the overlapping edge of the curved circular portion. A pressing positioning component, located below the curling positioning component, presses the remaining straight portion of the steel plate in a rotating manner and positions the overlapping edge of the straight portion. Unlike traditional guide rail positioning methods, the positioning process of this device is performed simultaneously during the bending process of the steel plate. This eliminates the need for constant detection and control during guide rail movement, simplifying the operation process, reducing the time spent on positioning, and avoiding the time waste and path redundancy caused by separating positioning and bending in traditional methods. This makes the entire process from transfer to bending positioning of the steel plate more seamless, significantly improving overall production efficiency and reducing time costs in the production process.

The utility model discloses a welding mechanism used on an assembly line, relates to the welding technology field, and comprises a base plate and a crest welder, the top surface of the base plate is fixedly provided with a first support frame, the side wall of the first support frame is fixedly provided with a side position dimension detection camera, the top surface of the base plate is provided with a movable platform, and the top surface of the base plate is provided with a crest welder. A second electric push rod is fixedly installed on the top face of the bottom plate, one end of the second electric push rod is fixedly connected with a movable platform, the crest welder is fixedly installed on the top face of the movable platform, a terminal containing disc is arranged above the bottom plate, and the position of the terminal containing disc corresponds to the position of the side size detection camera. According to the utility model, through automatic introduction, detection and welding processes, the welding efficiency can be obviously improved. Compared with a traditional manual welding mode, manual intervention can be reduced through automatic welding, so that the welding period is shortened, and the production efficiency is improved.

The utility model belongs to the technical field of seat manufacturing, especially a welding tool, in view of the low positioning accuracy of traditional welding tool, the poor operation flexibility, the deviation caused by the dependence on artificial positioning workpiece, and the problem that the design does not fully consider the convenience and safety, influence welding quality and efficiency etc.

The present application relates to the technical field of intelligent welding, and particularly relates to a hydraulic support structural member intelligent welding system, which is based on a hydraulic support structural member welding robot and further comprises: a scanning modeling module, which is used for scanning a current assembly area of a to-be-welded hydraulic support after assembly of each batch of parts of the to-be-welded hydraulic support is completed, and generating a three-dimensional model; an identification comparison module, which is used for locally registering and comparing the three-dimensional model with a pre-stored design drawing model, obtaining a deviation vector field representing a current assembly error, and generating a deviation item list; an adaptive compensation module, which is used for dynamically deforming and pre-compensating weldable weld seams and optimizing a welding sequence, and generating compensated welding parameters; and a welding module, which is used for generating a welding program executable by a welding robot, and enabling the welding robot to perform welding work. The present application solves the technical problems of the prior art, such as dependence on manual operation, low efficiency, high risk and poor quality.

The utility model relates to a friction welding clamp for a driver shell. The friction welding clamp comprises a rectangular case, a pull-down station and a transverse push rod, the U-shaped rods are directly connected with the supporting feet in a hanging mode, the structures of the supporting feet are naturally avoided, the two supporting feet are synchronously pulled down through the lifting blocks, two-point cooperative fixing is achieved, and it is guaranteed that stress on the supporting feet is balanced. The downward pulling force compacts the machine body on the machine box to resist upward separating force, the transverse pushing force resists axial moving force, and stability of the welding end face is doubly guaranteed. A workpiece is placed, the U-shaped rod is hung in, and the pull-down and jacking mechanism is started, the steps are clear, and operation is easy. Under the combined action of the downward pulling force and the jacking force, a stable clamping system is formed, and welding defects caused by uneven stress or displacement in the welding process are effectively prevented.

The application discloses a kind of vacuum electron beam welding methods of beryllium aluminum alloy, belong to metal material welding technical field, comprising the following steps: A, beryllium aluminum alloy plate is polished and cleaned and is handled;B, beryllium aluminum alloy plate is clamped with welding fixture, and the position to be welded is placed in the welding work area of electron beam welding system workstation;C, electron beam welding system is pumped to welding work vacuum degree, sets welding process parameter;D, preheating treatment is carried out to workpiece before welding, starts electron beam welding system, and beryllium aluminum alloy plate is welded;E, after welding, carries out postwelding slow cooling treatment.The application is designed by electron beam welding process and tooling fixture, optimizes electron beam welding heat input, controls cooling rate and the like mode, improves the uniformity of weld molten metal composition and organization, and the beryllium aluminum alloy weld obtained is not only free from crack, pore and other welding defects, simultaneously, but also makes the mechanical property of welded joint better than base material.

The utility model discloses a fluid conveying pipeline which comprises a plurality of pipe bodies, every two adjacent pipe bodies are connected together through a connecting mechanism, each connecting mechanism comprises a communicating piece and a plurality of assembling assemblies, and each assembling assembly comprises a multi-tooth clamp spring, a gasket, a sealing ring and a flange. The communicating piece is sequentially provided with a positioning step, a limiting step and a sealing step in the direction from the interior of the communicating piece to the opening end, the positioning step is used for positioning the axial end face of the pipe body, the multi-tooth clamping spring, the gasket and the sealing ring are sequentially installed on the limiting step, the end face of the flange abuts against the sealing step, and the flange is connected with the communicating piece through a fastener. The fluid conveying pipeline can solve the field installation problems such as non-standard accessory specifications and long installation time, can quickly shorten the field installation process time, is quick in positioning, can be disassembled at any time, is good in firmness and sealing performance, does not need to be welded, and avoids welding defects.

The present application relates to the technical field of welding, in particular to a desk leg welding positioning device, which comprises a supporting assembly, a pre-positioning assembly and a clamping assembly; the supporting assembly comprises a base and a supporting table for placing a desk body; the pre-positioning assembly is provided with a lifting plate in sliding connection with the supporting table, a lifting structure for driving the lifting plate to move, two sliding plates slidingly arranged on the lifting plate and a pushing structure for pushing the sliding plates to approach the desk legs for pre-positioning; the clamping assembly is used for clamping the desk legs after pre-positioning. Through the mechanical pre-positioning and clamping linkage mechanism, the present application reduces manual intervention, improves the positioning accuracy and speed of desk leg assembly, and thus improves the overall welding efficiency.