3234results about How to "Improve welding quality" patented technology

The invention relates to the technical field of welding processing, and discloses a dissimilar metal welding joint temperature field optimization control method and system. Real-time temperature field scanning is conducted on the dissimilar metal welded joint, image segmentation processing is conducted on a temperature field image obtained through scanning, temperature data of a weld joint area, a heat affected area and a base metal area are extracted, and whether the temperature gradient exceeds a preset threshold value or not is judged; aiming at an area with non-uniform distribution of heat input quantity, analyzing the performance of the welding joint under the combined action of thermal stress and mechanical stress, obtaining the difference between residual stress distribution and plastic deformation capacity, and analyzing a stress concentration area by combining with the yield strength of the material; and a mapping relation between the welding process parameters and temperature field distribution is established, and a welding process parameter adjustment prediction model is obtained through historical welding process parameters and corresponding temperature field data training in combination with heat flux density distribution. The problems of uneven heat input, stress concentration and the like in dissimilar metal welding are effectively solved, and the welding quality and efficiency are improved.

The invention discloses a welding path planning method based on machine vision, and relates to the technical field of welding robotics.The method comprises the steps that sample data of various groove types are collected, classified and stored, a groove type database is established, and an extraction condition template is defined; groove section data are obtained through the machine vision technology, a three-dimensional model is constructed after grouping, welding seam, material and heat affected zone characteristics are analyzed, a welding sequence principle is determined, and a comprehensive welding path is generated; key parameters in the welding process are monitored in real time, an early warning mechanism is set, and the optimal path is dynamically adjusted; updating a database according to the path planning efficiency value, comprehensively analyzing candidate paths, and recommending an optimal welding path; the extraction condition template is dynamically adjusted, the precision, adaptability and efficiency of welding path planning can be improved, and the welding quality and stability are ensured; and a plurality of different cross section data are analyzed, the comprehensive welding path is determined, and various different cross section data characteristics can be met at the same time.

The invention discloses a full-automatic laser welding forming system, which relates to the technical field of laser welding, and comprises a laser generation and light beam modulation module, a material conveying and positioning module, a welding execution module, a visual inspection and monitoring module, an intelligent self-adaptive control module and an energy recovery and reutilization module, the material module accurately conveys and positions materials; the welding module robot is accurate in operation; the visual module detects welding seams; the intelligent module performs self-adaptive control; the energy module recycles energy. The welding quality is improved, and defects are reduced; the production efficiency is improved and the cost is reduced; operation is simple, and manpower requirements are reduced; energy is saved, environment is protected, and green concept is met; real-time monitoring is achieved, and the product quality and the management level are guaranteed.

The invention relates to the field of flange plate welding, in particular to an automatic flange plate welding device which comprises a fixing table, a three-jaw chuck used for clamping a flange plate is arranged at the upper end of the fixing table, and a fixing mechanism used for fixing the flange plate and a pipeline and a circumferential welding mechanism used for welding the pipeline to the flange plate are arranged above the fixing table. In the downward moving process of the fixing mechanism, the flange plate which is clamped and fixed can be limited in the circumferential direction, the upper end of a pipeline can be pressed, meanwhile, the pipeline can be clamped through the inner clamping assembly, the effect that one machine has multiple functions is achieved, it is ensured that the flange plate and the pipeline reach the optimal alignment state before welding, and the welding efficiency is improved. And meanwhile, the overall structural stability in the welding process can be further improved, the welding quality is improved, and the overall working efficiency is improved.

The invention relates to the technical field of bracket welding, in particular to a tractor bracket part welding device. Comprising a rack, an overturning frame, a clamping mechanism, a distance adjusting mechanism, an overturning mechanism and a pushing mechanism, the overturning mechanism is provided with two rotating discs synchronously rotating with the overturning frame, and the clamping mechanism comprises a steel mounting frame arranged on the overturning frame, a clamping assembly and a clamping driving assembly arranged on the rotating discs and in transmission connection with the clamping assembly; the distance adjusting assembly comprises a threaded sliding seat which is slidably arranged on the overturning frame and is in transmission connection with the steel mounting frames on the two sides and a rotary driving assembly which is installed on the rotary disc and is in transmission connection with the threaded sliding seat, and welding robot arms are arranged at the two ends of the side of the machine frame. By means of the H-shaped steel welding device, stable clamping of H-shaped steel of different sizes is achieved, longitudinal clamping is guaranteed, meanwhile, transverse position adjustment and automatic centering deviation correction can be conducted, the welding precision and quality are improved, the H-shaped steel welding device meets the requirements of various working conditions, manual adjustment steps are reduced, and the working efficiency is improved.

The invention relates to the technical field of automatic welding seam grinding, in particular to a welding seam grinding method, system and device based on laser vision stirring friction, and the method comprises the steps that a laser image of a welding seam is obtained, gray threshold segmentation is conducted on the laser image, and a laser stripe image is obtained; extracting sub-pixel feature points of the laser stripe image to obtain a laser stripe center line, and converting a two-dimensional point set of the laser stripe center line into a three-dimensional space to form a laser stripe three-dimensional point cloud; performing feature extraction on the laser stripe three-dimensional point cloud to obtain feature data of a flash area; and based on the feature data of the flash area, a polishing path is planned, and the flash area of the welding seam is polished and machined along the polishing path through a polishing tool. According to the invention, automatic identification and accurate polishing of the weld flash are realized, the polishing efficiency and quality are improved, and manual intervention is reduced.

The invention belongs to the technical field of welding, and discloses an L-shaped laser-MIG hybrid welding device for a narrow space, and the L-shaped laser-MIG hybrid welding device for the narrow space comprises a welding gun assembly, a laser welding head assembly and a space adjusting assembly. The laser and the electric arc are combined, a laser and electric arc composite heat source is obtained, and the advantages of laser and electric arc composite welding are fully exerted; laser-MIG hybrid welding has the advantages of being high in welding speed, low in heat input, large in equipment clearance tolerance degree and high in welding quality. A welding gun wire feeding route is optimized, the precision of a wire guide assembly is improved, the straightness of a welding wire is guaranteed by combining a three-wheel straightener, and the purpose of stable wire feeding is achieved. The overall connecting piece structure is simplified, the reflecting copper mirror integrating reflection, collimation and focusing is designed, the overall size space is saved, the overall load is reduced, and more functions can be added compared with equipment of the same type under the condition that the load is limited.

The invention relates to the field of welding, in particular to steel structure welding equipment with an automatic positioning function, which comprises a fixed ring I, an electric control guide rail, a cylinder, an electric push rod I, a sliding ring, a fixed ring II and the like, the first fixing ring is fixedly connected with an electric control guide rail. The electric control guide rail is rotationally connected with a cylinder through a sliding block. The cylinder is fixedly connected with a plurality of electric push rods I; telescopic parts of all the electric push rods are jointly and fixedly connected with a sliding ring; the sliding ring is rotationally connected with a second fixing ring. The two steel pipes in butt joint are fixed through the electric driving wheels on the first fixing ring and the second fixing ring, the first fixing ring, the cylinder and the second fixing ring are concentrically arranged, all the electric driving wheels jointly center and clamp the two steel pipes, and then the laser welding head is controlled to rotate for welding. During welding, deviation between the steel pipes can be effectively avoided, and the welding quality of butt joint of the steel pipes is improved.

The invention discloses a welding device and method for a corrugated plate of a MARKIII type enclosure system, and the welding device comprises a corrugated section clamp which is of an inverted U-shaped structure and comprises a horizontal plate and two vertical side plates, and the vertical side plates of the corrugated section clamp are provided with clamping grooves corresponding to corrugated sections in shape. And the connecting rod is connected with the corrugated section clamp horizontal plate and extends out of the corrugated section clamp horizontal plate. The cushion block is arranged at the tail end of the connecting rod. The rail is connected to the tail end of the cushion block and is perpendicular to the connecting rod. The welding device can move by 360 degrees in the horizontal direction and is matched with an automatic corrugated plate welding machine, a specific welding sequence is applied, and the purposes that all corrugated plates in all positions of a real ship can be welded through the automatic welding machine, and the production efficiency is improved are achieved.

The invention relates to the technical field of laser welding, in particular to a multi-station automobile part laser welding system which comprises a workbench, laser welding equipment is installed on the workbench, a fixing sleeve is fixedly connected to the workbench, a rotating disc is rotatably connected to the interior of the fixing sleeve in a penetrating mode, and a plurality of adjusting machining tables are fixedly connected to the rotating disc. An adjusting seat is rotationally connected to the adjusting machining table, a limiting transmission sleeve is rotationally connected to the adjusting seat, an automobile transmission shaft is placed in the limiting transmission sleeve, a pretreatment seat is fixedly connected to one side of the workbench, a pretreatment mechanism is rotationally connected to the interior of the pretreatment seat, and the pretreatment mechanism comprises a grinding brush wheel and a flushing pipe; before the automobile transmission shaft is welded, the automobile transmission shaft can be automatically cleaned through the rotating grinding brush wheel before welding, the cleanliness of the welding face is ensured, and therefore the welding quality is improved, the production cost is reduced, the production efficiency is improved, and the high requirement of modern automobile manufacturing is met.

The present invention discloses an ultrasonic-assisted annular laser coaxial wire feeding welding device and a welding method, and belongs to the field of welding technology. A clamping mechanism is arranged above the support frame of the ultrasonic-assisted annular laser coaxial wire feeding welding device, a vibration mechanism is arranged on the support frame, a welding mechanism is arranged above the support frame, the welding mechanism is connected to a mechanical arm, and an ultrasonic mechanism is arranged on the welding mechanism. A connecting pipe is arranged at the center of the welding mechanism fixed seat, a wire feeding tube is arranged inside the connecting pipe, a plurality of lasers are evenly arranged on the fixed seat, a light inlet channel for the laser to pass through the fixed seat is arranged inside the fixed seat, the circle where the laser is located is coaxial with the wire feeding tube, a nozzle is arranged below the fixed seat, and a cavity for the wire feeding tube and the laser to pass through the nozzle is arranged inside the nozzle. The ultrasonic-assisted annular laser coaxial wire feeding welding device and the welding method described in the present invention can solve the problems of poor adaptability and poor ultrasonic treatment effect of the existing welding device.

The utility model relates to the technical field of flange centering welding, in particular to an automatic flange centering welding device which comprises a base, a centering mechanism installed on the base, a pressing air cylinder installed on the base and used for pressing a flange and a displacement mechanism used for driving the base to move in a reciprocating mode. The centering mechanism comprises a centering assembly and a power part, the power part drives the centering assembly to synchronously move towards the periphery in the radial direction and is fixedly installed relative to the base, the centering assembly synchronously moves towards the periphery in the radial direction and is used for supporting the inner diameter of a steel pipe, and a positioning pin is further installed on the centering mechanism. The positioning pin is used for solving the technical problems that in the prior art, when a steel pipe and a flange are subjected to centering welding, the steel pipe is prone to deformation, and the product rejection rate is high due to the poor centering performance of the steel pipe and the flange.

The utility model relates to the technical field of welding, and discloses an auxiliary device of a handheld welding machine, which comprises a base and a fixing disc, a limiting groove is arranged in the base, a limiting assembly is arranged on one side of the fixing disc, a first motor is fixedly connected to one side of the fixing disc, a worm is fixedly connected to the output end of the first motor, and a second motor is fixedly connected to the output end of the worm. A worm wheel is rotatably connected to one side of the fixing disc, the worm wheel is meshed with the outer wall of the worm, an arc-shaped groove is formed in the worm wheel, a supporting rod is arranged in the fixing disc, and the outer wall of the supporting rod is slidably connected to the interior of the limiting groove. According to the round pipe welding device, through cooperation of the fixing disc, the clamping blocks, the worm gear, the worm, the supporting rod and the first support, the effect of adapting to fixing of round pipes of different sizes is achieved, the problem that the round pipes move in the welding process due to the fact that only the round pipes are placed on a supporting table and are not convenient to fix is solved, and the welding quality of the round pipes is improved.

The invention discloses a digital intelligent welding method for controller production, and relates to the related field of welding control, and the method comprises the following steps: carrying out real-time welding sensing on a controller of an electric tricycle to obtain a plurality of real-time welding data, and carrying out data fusion according to multi-dimensional production environment information, and an obtained welding fusion result is synchronized to a quality detection module to be recognized, a welding defect data set is obtained to conduct dynamic feedback correction on the multiple pieces of real-time welding data, and a welding control strategy is formulated to conduct digital intelligent welding on a controller of the electric tricycle. The technical problems of unstable welding quality and inaccurate defect prediction caused by untimely adjustment of traditional welding parameters are solved, and the technical effects of real-time data acquisition, dynamic performance feedback correction and welding prediction trend analysis, improvement of welding quality and reduction of production defects are achieved.

The invention discloses a full-position welding penetration online detection method based on cooperation of an electric signal and a molten pool image. A pipeline is subjected to full-position welding under cooperation of double robots; preliminary segmentation is conducted on the basis of the welding position, segmentation is conducted again at the angle of 5-10 degrees, a laser scanner is adopted to scan a pipeline groove to obtain the groove size of each segment, and self-adaptive setting of welding process parameters is achieved on the basis of a process knowledge base and a welding parameter adjusting model; fusing the molten pool image and the electric signal time domain characteristic value, and performing discrimination through a neural network prediction model; and obtaining weld pool size characteristics based on the weld pool image, calculating a reference weld pool oscillation frequency based on a reference weld pool oscillation frequency model, performing spectral analysis on an upper envelope signal of the voltage signal, calculating an actual weld pool oscillation frequency, and comparing the actual weld pool oscillation frequency with the reference weld pool oscillation frequency to judge whether the weld is penetrated or not. According to the invention, all-position welding forming defect monitoring of the robot is realized.

The invention discloses a hot melting type rapid welding device for MPP electric power pipe production, belongs to the field of pipe fitting welding, and aims at improving a conventional welding device, by arranging a clamping mechanism for clamping in the up-down direction and a welding assembly initially of a non-closed annular structure, two pipe fittings can be in transverse coaxial butt joint conveniently, and during welding, the welding efficiency is greatly improved. One set of annular frame and welding gun matching structures are rotationally pushed to the opening, the pair of welding guns are arranged close to each other, then the pair of welding guns are driven to move reversely, rapid circumferential welding of the two pipe fittings is achieved, the welding time is shortened, after welding is completed, the two sets of welding guns are reset to expose the external opening space, the welded pipe fittings are conveniently and transversely taken out, and the welding efficiency is improved. The pipe fitting penetrating-in and penetrating-out operation is simplified, the annular welding rod is additionally arranged at the butt joint position of the two pipe fittings, coaxial accurate butt joint of the two pipe fittings with different diameters is facilitated, the melting amount of the ends of the two pipe fittings can be kept consistent, the welding quality is improved, and irregular welding layers are prevented from being formed.

The invention belongs to the technical field of bridge expansion joint welding, and particularly relates to a bridge expansion joint welding fixing device with a limiting mechanism, which comprises a welding seat, a processing seat fixed on the surface of the welding seat and bridge expansion joint profile steel attached to two sides of the surface of the processing seat, and a limiting assembly is mounted on the surface of the welding seat. The device is provided with the limiting assembly, the position of the bridge expansion joint profile steel can be effectively limited, it is guaranteed that the bridge expansion joint profile steel is kept in a stable state in the welding process, the welding quality can be better improved, and welding defects caused by position deviation of the bridge expansion joint profile steel are reduced; according to the bridge expansion joint profile steel limiting device, collision or damage caused by displacement of the bridge expansion joint profile steel is reduced, meanwhile, the bridge expansion joint profile steel is pressed and limited through the pressing plates at the four corners, limiting force can be applied to the bridge expansion joint profile steel in multiple directions, the overall limiting effect is enhanced, the profile steel can better resist external force interference in the welding process during welding, and the welding quality of the profile steel is improved. And smooth welding is ensured.

The invention discloses a vision-based weld defect detection method and system, and relates to the technical field of weld defect detection, and the method comprises the steps: adjusting welding parameters when scene environment data in a welding region is monitored and obtained to be inconsistent with expectation; after heat distribution data of the welding part is collected, a distribution abnormal value is generated, whether the distribution abnormal value exceeds the expectation or not is judged, if yes, welding defects of the welding part are predicted, and welding process parameters are optimized according to predicted data; after surface defect data of the welding part are recognized and obtained, internal defects of the welding part are detected, and simulation test data are obtained after the performance of the welding part is tested; and taking the surface defect data, the internal defect data and the simulation test data as feedback, and giving a corresponding process optimization scheme through the welding process optimization knowledge graph. The current welding defect is subjected to preliminary defect detection, the detection result can be quickly obtained, and whether the welding position has the welding defect at present or not is verified.

The invention relates to the field of welding technology and finite element analysis, and particularly discloses a welding simulation method and system based on sub-field modeling. According to the system, the welding area is divided into a plurality of sub-fields, so that the simulation precision and efficiency are improved. The system comprises four main parts: gridding, heat source setting, thermal analysis and structural analysis. And the gridding module realizes fine grid division of the complex geometry by utilizing a sub-field technology and combining isotherm information. The heat source setting module accurately defines heat input conditions in the sub-fields according to welding process requirements. The thermal analysis module simulates the change of a temperature field in the welding process and provides detailed sub-field temperature distribution data. And the structural analysis module analyzes stress and deformation caused by welding based on the thermal analysis result, and particularly focuses on stress transfer and deformation behaviors among the sub-fields. According to the whole system, the welding simulation precision is greatly improved, manual intervention is reduced, and powerful technical support is provided for optimization of a complex welding process.

The invention relates to the technical field of laser welding, in particular to a cold-roll steel sheet laser welding machining system and method, the cold-roll steel sheet laser welding machining system is matched with the cold-roll steel sheet laser welding machining system for completion, and the cold-roll steel sheet laser welding machining system comprises a first rectangular plate, a working platform, a lifting clamping mechanism, a wheel disc clamping mechanism and a feeding auxiliary mechanism. According to the laser welding machining system and method for the cold-rolled steel sheets, the adopted lifting clamping mechanism is provided with the wheel disc clamping mechanism and the feeding auxiliary mechanism which are matched, the multiple blades can be driven to swing by a proper angle, then the multiple blades are jointly clamped through the multiple first arc-shaped clamping plates, and the machining efficiency is improved. The problem that the angles of the blades are not consistent when the blades are manually and sequentially placed during manual welding is solved, the front wheel disc and the rear wheel disc can be clamped, the multiple blades and multiple welding positions of the front wheel disc and the rear wheel disc are welded at the same time, manual sequential welding is not needed, and the welding efficiency and the welding quality of the multiple blades and the front wheel disc and the rear wheel disc are effectively improved.

The invention relates to the technical field of hub manufacturing friction stir welding, in particular to a hub manufacturing friction stir welding device which comprises a supporting table, a supporting disc is movably mounted at the top of the supporting table, a clamping assembly is mounted at the top of the supporting disc, and a hub is fixedly mounted at the top of the supporting disc. The clamping assembly is located on the inner wall of the inner ring of the hub, a rotating assembly is installed between the supporting table and the supporting disc, an electric push rod is fixedly installed on the side, away from the supporting disc, of the top of the supporting table, a first supporting block is fixedly installed on the top of the electric push rod, and a second supporting block is movably installed at the front end of the first supporting block. And the top of the second supporting block is fixedly connected with a second mounting block. According to the hub welding device, a hub can be effectively fixed by arranging the clamping assembly, the hub can be conveniently rotated by the rotating assembly, a device for friction stir welding and collecting chippings is arranged, and the hub welding quality, efficiency and environmental friendliness are improved.

The invention relates to the technical field of LED display, and discloses a Mini / Micro LED and a manufacturing method thereof. The manufacturing method comprises the following steps: preparing metal conductive particle balls through a mechanical separation process or a spraying process; coating an insulating coating on the surface of the metal conductive particle ball and air-drying to form an insulating film; putting the metal conductive particle balls coated with the insulating films into provided insulating glue and stirring to form anisotropic conductive glue; printing anisotropic conductive adhesive on a bonding pad of the provided substrate through the provided hydrophobic nano steel mesh; stripping the hydrophobic nano steel mesh; the provided Mini / Micro LED chip is mounted on the anisotropic conductive adhesive located on the bonding pad, the insulating film is longitudinally broken by heating and pressurizing to expose the metal conductive particle balls wrapped in the insulating film, the metal conductive particle balls are respectively in contact with the Mini / Micro LED chip and the bonding pad to form a vertical conductive path, and the insulating adhesive is preliminarily cured to obtain the Mini / Micro LED, so that stable welding quality is realized; and the maintenance difficulty and the maintenance cost are low.

A method for installing an energy-saving guide wheel in a ship manufacturing process relates to the technical field of ship manufacturing, and comprises the following steps: installing a stern shaft tube casting and the energy-saving guide wheel under a tire, placing an adjustable platform in place according to a ground sample line, cutting the allowance of the energy-saving guide wheel, placing the energy-saving guide wheel on the adjustable platform, and carrying out simple field cutting and repairing. Meanwhile, a groove of a cut and trimmed part is processed, then the energy-saving guide wheel is adjusted in place through a chain block, finally one-time accurate positioning is achieved, the situation that multiple times of cutting positioning occur when the energy-saving guide wheel and a stern shaft tube casting are installed is avoided, manpower and material resources are reduced, meanwhile, the matching time of a gantry crane is shortened, and the production efficiency is improved. And the cutting gap is reduced from the original 30 mm to the present 3-5 mm, so that the use amount of a large amount of welding materials is saved, the purposes of saving energy and reducing consumption are achieved, and the welding quality is improved.

The invention relates to the technical field of electronic packaging, and discloses a method for controlling welding of a welding hole plug-in by using a prefabricated welding flux, and the method comprises the following steps: S1, dehumidifying and drying: drying a substrate by using a drying oven; s2, a solder column is manufactured, specifically, based on an original welding hole site in the substrate to be welded, the soldering tin amount Vt between the welding hole site and the plug-in is calculated, the size of the solder column is calculated according to the value of the soldering tin amount Vt, and the solder column is manufactured; s3, welding preparation is conducted, specifically, the plug-in, the substrate and the welding flux column are sequentially installed on the clamp body; and S4, reflow soldering. The soldering tin amount is calculated according to the size of a welding hole site needing to be welded and the size of a plug-in, a solid solder column of a fixed mass is manufactured in advance through the calculated soldering tin amount, the soldering tin amount is accurately controlled so as to accurately fill a weld joint, the situation that tin is too much or too little after welding is avoided, the welding quality is improved, and meanwhile the welding quality is improved. During welding, the amount of solder paste does not need to be controlled, and the efficiency can be greatly improved by directly using the solder column and placing the solder column on the plug-in.

The invention discloses a high-temperature superconducting Tokamak cold shield assembly assembling system and method. The high-temperature superconducting Tokamak cold shield assembly assembling system comprises a positioning assembly, a welding assembly, a supporting frame, supporting legs, a locking mechanism and a driving mechanism. The invention relates to the technical field of welding tools. According to the high-temperature superconducting Tokamak cold shield assembly assembling system and method, the supporting frame is arranged to be installed around the lower-layer high-temperature superconducting Tokamak cold shield, the positioning assembly and the welding assembly can be placed on the supporting frame in sequence, and the positioning assembly can abut against the lower-layer high-temperature superconducting Tokamak cold shield by half; the high-temperature superconducting Tokamak cold shield suspended on the upper layer to be put down is positioned and guided, it is guaranteed that the high-temperature superconducting Tokamak cold shield can be accurately in butt joint with the high-temperature superconducting Tokamak cold shield on the lower layer, and then the problem that butt joint dislocation of the heavy high-temperature superconducting Tokamak cold shield is difficult to adjust is solved. And after the positioning assembly is taken down, the welding assembly is replaced, the welding assembly can be driven by the driving mechanism to rotate around the high-temperature superconducting Tokamak cold shield along the supporting frame for welding, and manpower is saved.

The invention provides a non-stop production under-pressure tapping construction method for an oil pipeline, and belongs to the technical field of oil pipeline construction. The method comprises the steps that a tapping operation point is selected, and the wall thickness is measured; preparing an under-pressure welding short pipe and a valve; welding a short pipe on the oil pipeline under pressure, and determining optimal welding current, voltage and welding speed by adopting a welding parameter game model; installing a valve and carrying out a strength test; assembling the tapping machine and connecting the tapping machine with the valve; carrying out overall air tightness inspection; pressure tapping operation is executed, and the tapping speed and the feeding amount are adjusted in real time through the tapping operation parameter optimization model; returning the cutter and closing the valve after tapping; and dismantling the tapping machine to finish the operation. According to the scheme, the problems existing in the prior art are effectively solved, the reliability and safety of under-pressure trepanning construction are greatly improved, meanwhile, the operation efficiency is remarkably improved, and the problems that in an existing under-pressure trepanning technology, the welding quality is still difficult to control, and the trepanning process is uncontrollable are solved.

The invention relates to the technical field of welding devices, in particular to an aluminum alloy door and window welding machine which comprises a mounting support, an air cylinder is mounted at the upper end of the mounting support, an output shaft of the air cylinder penetrates through the mounting support, and a welding mechanism is mounted on the output shaft of the air cylinder and comprises a first mounting plate fixedly connected with the output shaft of the air cylinder. An exhaust mechanism is mounted on the other side of the first mounting plate, four sets of first electric telescopic rods are mounted on the inner side of the mounting support, clamping mechanisms are mounted on output shafts of the first electric telescopic rods, and welding seams between arc-shaped window frames can be welded through mutual cooperation of second electric telescopic rods and first welding heads; and welding can be conducted on inner side welding seams of the assembling grooves, welding is more comprehensive, connection between the arc-shaped window frames is more stable, through mutual cooperation of a fourth gear and a third electric telescopic rod, comprehensive cleaning is conducted on the peripheries of the welding seams, cracks and bubbles during welding are avoided, and the welding seams are firmer.

The invention discloses truss group automatic welding equipment which comprises a welding platform, a turnover frame is arranged on one side of the welding platform, multiple groups of trusses can be stacked on the turnover frame, a steel bar storage frame is arranged on the other side of the welding platform, and the steel bar storage frame is used for storing steel bar cross beams used for welding the truss groups; a movable first grabbing assembly, a movable second grabbing assembly and a movable welding assembly are arranged above the welding platform, the first grabbing assembly can grab a plurality of trusses which are stacked on the turnover frame and are at the same height at the same time and place the trusses on the welding platform, and the reinforcing steel bar storage frame can insert reinforcing steel bar cross beams into the upper portions of the trusses on the welding platform. The welding assembly can weld the steel bar cross beam and the multiple trusses together to form a truss set, and the second grabbing assembly can grab the welded truss set and place the welded truss set in a storage area to be stored. The truss group production line and the truss group production process are ingenious in structural design, high in automation degree and stable in welding quality, and the production efficiency is improved.

The utility model discloses a thin-wall carbon steel process pipeline welding clamping device which comprises a conveying roller, an outer clamping device and an inner clamping device, the outer clamping device and the inner clamping device are installed on a bottom plate of the conveying roller, and the conveying roller is driven by a servo motor to adjust the welding distance of a thin-wall carbon steel process pipeline. The outer clamping device fixes the thin-wall carbon steel process pipeline through two V-shaped clamping blocks installed on two first hydraulic cylinders and umbrella-shaped rubber pads on two third hydraulic cylinders of the inner clamping device, the clamping distance of the inner clamping device is adjusted through a second hydraulic cylinder, and therefore welding is conveniently completed. The clamping device solves the problem that the large-diameter thin-wall carbon steel process pipeline is easily influenced by environmental factors such as materials and pipeline diameters in the welding and clamping process, solves the problems that the large-diameter thin-wall carbon steel process pipeline is easy to deform, easy to clamp off, high in cost and the like in the welding and clamping process, ensures the safety performance in the clamping process of the large-diameter thin-wall carbon steel pipeline, and improves the welding quality of the large-diameter thin-wall carbon steel pipeline. The welding quality is improved.

The invention relates to a pipeline welding device for a thermal power plant. The pipeline welding device comprises a frame body, an inner ring centering mechanism, an outer ring centering mechanism, an inner ring welding mechanism and an outer ring welding mechanism, the inner ring centering mechanism comprises a driving motor, a two-way screw rod, two auxiliary supporting seats, two plugs and a guide assembly; the two auxiliary supporting seats are installed on the frame body, the two-way screw penetrates through the two plugs, the two-way screw is rotationally connected with the auxiliary supporting seats, and the two plugs are connected to the two-way screw in a threaded mode; the driving motor is mounted on one of the auxiliary supporting seats; the inner ring welding mechanism comprises a supporting base, a lifting air cylinder and an inner welding machine. The supporting base is horizontally installed on the two-way screw, the lifting air cylinder is installed on the supporting base, and the internal welding machine is installed on a piston rod of the lifting air cylinder. By means of the inner ring centering mechanism and the outer ring centering mechanism, two pipelines of different sizes and specifications can be centered and fixed conveniently, welding of inner ring butt seams and outer ring butt seams of the pipelines of different sizes and specifications is achieved, and the welding quality of the pipelines is improved.