196 results about "Welding defect" patented technology

This invention relates to a method for simultaneously producing single-sided and double-sided stainless steel composite plates, comprising steps such as billet preparation, billet processing, application of release agent, spot welding assembly of composite materials, surface treatment of the composite billet, alignment of the assembly, vacuum electron beam welding, defect repair welding, heating of the composite billet, and rolling of the composite billet. This invention, through vacuum welding and heated rolling of double-layer sandwich plates, enables the simultaneous production of both single-sided and double-sided stainless steel composite plates from a single set of composite billets. The rolled stainless steel composite plates exhibit satisfactory flaw detection results, with performance far exceeding user requirements. Furthermore, it allows for mass production and industrialization, providing strong technical support for the stable production of single-sided / double-sided stainless steel composite plates.

The utility model provides a kind of welding equipment, including mobile robot, welding adjusting device, welding torch and wire feeder, welding adjusting device is installed in mobile robot, for adjusting the position of welding torch and wire feeder;Wherein, welding torch is replaceable, tungsten needle structure, driving assembly and limiting component are all installed in gun main body, driving assembly and tungsten needle structure are movably connected, to make the tip of tungsten needle structure swing in the process of revolution.In the present scheme, mobile robot can adjust welding adjusting device, improve the degree of freedom of welding torch and wire feeder;Driving assembly and limiting component jointly act, make the tip of tungsten needle structure swing when it revolves, destroy the surface tension of liquid solder at weld, expand the welding area of single welding, improve welding efficiency;At the same time, so set, rotating arc evenly distributes heat, reduces welding defect, improves weld strength.

This application relates to the field of welding auxiliary equipment technology and discloses a tooling for angled fillet welds on tube sheets, including an annular seat and a tube sheet component. A vertical plate is mounted on the annular seat via a sliding structure. A rotating shaft is rotatably connected to the outer wall of the vertical plate. A connecting frame is fixedly connected to one end of the rotating shaft. Two fixing rings are fixedly connected to the outer wall of the connecting frame. A threaded connector is fixedly connected to the bottom outer wall of the mounting cylinder. A tooling positioning head is threadedly connected to the outer wall of the threaded connector. An angle adjustment mechanism is installed on the outer wall of the vertical plate. In this invention, the angle adjustment mechanism can precisely adjust and stably maintain the welding torch angle, avoiding fluctuations in the welding torch angle due to the welder's lack of skill. This reduces problems such as unstable current output and heat input differences caused by angle changes, thereby reducing the probability of abnormal cooling rate of the molten pool, reducing welding defects such as incomplete penetration, and improving the welding quality of fillet welds, enhancing the performance and service life of welded components.

This utility model discloses a steel structure weld flaw detection scanning mechanism, relating to the field of steel structure inspection technology. The weld flaw detection scanning mechanism includes a base and a flaw detector mounted on the base, as well as a lifting assembly, an angle control assembly, a lateral movement assembly, and a moving assembly. This utility model, through the lifting assembly and the probe fixed on the lifting platform, can perform flaw detection on welds at high positions, improving detection efficiency. Simultaneously, the angle control assembly allows for arbitrary control of the probe angle, thus meeting the flaw detection needs of non-linear welds and improving the comprehensiveness and accuracy of flaw detection. The device, through signal feedback from the flaw detector in the lateral movement assembly and in conjunction with a PLC controller, can stop the probe's detection movement in real time when a weld defect is detected, thereby achieving precise positioning of the welding defect and avoiding positional errors caused by human error during handheld inspection.

A laser welding device and method for sealing nails of large cylindrical batteries with adjustable local atmosphere belongs to the field of new energy vehicle battery welding technology. The device includes an outer shell fitted onto the top of the battery casing, a high-lens lens mounted on the top of the outer shell via a supporting frustum, an annular gas path structure disposed inside the outer shell, dividing the back of the outer shell into upper and lower chambers, a vacuum device connected to the upper chamber via a pipeline, and a dust removal device connected to the annular gas path built into the annular gas path structure via a pipeline. The annular gas path has multiple suction ports connected to the lower chamber. An elastic sealing ring is disposed in the lower chamber, and a centering ring is clamped between the elastic sealing ring and the battery casing. A sealing nail is installed on the inner ring of the centering ring. This method achieves reliable connection of sealing nails for large cylindrical batteries, improves welding quality, reduces welding defects, and solves the problem of low yield after welding sealing nails for large cylindrical batteries.

This application relates to the field of welding fixture technology, specifically providing a fixing device for high-altitude laser welding of outdoor gas pipelines. The device includes: a device body for temporarily fixing a new pipe section; a first clamping and fixing part fixedly disposed on the left side of the device body for clamping an existing pipe section; a second clamping and fixing part detachably disposed in the middle of the device body for clamping and fixing the weld joint between the existing and new pipe sections; and a third clamping and fixing part fixedly disposed on the right side of the device body for clamping the new pipe section. This provides a more reliable clamping force during high-altitude operations, effectively preventing pipeline displacement caused by wind disturbance or gravity, thereby improving laser welding quality, reducing weld defects, and ensuring the welding safety and reliability of outdoor gas pipelines.

The present application relates to the technical field of detection equipment, and more particularly to a seamless stainless steel pipe welding defect sensing and detection equipment, which comprises a rack, one side of the upper end of the rack is provided with a three-jaw chuck, the other side of the upper end of the rack is fixedly connected with a detection ring seat, one side of the rack is fixedly connected with a fixing frame, the fixing frame is fixedly connected with a feeding assembly, the bottom end of the fixing frame is fixedly connected with a pre-buried seat, a discharging chute is fixedly connected through the middle of the rack, and a material receiving assembly is symmetrically arranged above the discharging chute. Through the feeding assembly, the steel pipe on the ground can be automatically conveyed into the material receiving assembly and fixed by the three-jaw chuck, manual carrying is not needed, the demand for manual carrying is reduced, the work intensity of workers is reduced, and when the feeding assembly is retracted to the reset position, the protective plate on the pre-buried seat can be automatically closed, the workers are prevented from stumbling, the safety is improved, the efficiency is improved, the time is saved, the cost is reduced, and the product quality is steadily improved.

This invention discloses an artificial intelligence-based system and method for monitoring and analyzing weld defects, relating to the field of welding quality inspection technology. The method includes: acquiring surface images of composite current collector adapter tabs using a high-resolution industrial camera; identifying the precise location of each weld point; dynamically adjusting the angle, focal length, and light intensity parameters of the robotic arm and high-resolution industrial camera to capture images of each weld point at the optimal position based on the precise location of each weld point; extracting feature information of the weld points using image processing technology; automatically identifying the weld defect status of each weld point, classifying it into different weld defect levels, and marking the weld defect location and level on the weld point image; displaying the weld defect identification results on a display screen in real time, and printing the results into a report. This invention can automatically and accurately detect the weld point location and weld defect status of composite current collector adapter tabs, improving detection efficiency and accuracy.

The application discloses a preheating device for glass material circuit board welding and belongs to the technical field of circuit board processing and welding. The preheating device for glass material circuit board welding comprises a workbench and further comprises a rotary table rotatably arranged on the workbench, a motor one fixedly connected to the top of the workbench and used for driving the rotary table to rotate, wherein a preheating bin is formed in the top of the workbench, a first heating wire is fixedly arranged in the preheating bin, and a heat conduction plate is slidably arranged in the preheating bin; a storage rack for placing the circuit board is slidably arranged on the rotary table, a driving part for driving the storage rack to slide is arranged on the rotary table, and the storage rack is matched with the heat conduction plate; the preheating bin is arranged in the welding process to preheat the circuit board, sudden high-temperature bearing of the circuit board can be prevented, thermal expansion and cold contraction are intensified, welding defects such as false welding, cold welding and empty welding are generated at the welding points, the product quality is affected, and the production cost is increased.

This utility model discloses a laser cutting machine for irregularly shaped cups, comprising a frame, a fixture assembly, and a cutting assembly. The fixture assembly is mounted on the frame to fix the cup, and the cutting assembly is mounted on the frame to cut the cup. The fixture assembly includes a clamping mechanism and a rotating mechanism. The clamping mechanism is located above the rotating mechanism and adjustably floats to clamp the cup placed on the rotating mechanism. The rotating mechanism drives the cup to rotate and switch the cutting position. This utility model uses an adjustable-pressure fixture to fix the cup and uses laser to cut the cup, which can overcome the disadvantages of large deformation, poor flatness of the cut surface, and low efficiency after wire cutting of the cup, and can reduce the welding defect rate in subsequent processes.

The application belongs to the technical field of welding devices, and specifically discloses an automatic welding device for automobile scale processing, which comprises a workbench, a Y-axis driving mechanism, a gantry sliding table, an X-axis driving mechanism, a scale table and a reinforcing plate. The X-axis driving mechanism is provided with two groups and is arranged on the two sides of the workbench. The gantry sliding table is arranged above the X-axis driving mechanism through the sliding seat on the bottom. The Y-axis driving mechanism is connected with an electric arc welding mechanism through a Z-axis sliding seat. The electric arc welding mechanism is connected with a double-head electric arc gun at the lower end. The scale table is arranged above the workbench. The reinforcing plate is arranged at the bottom of one side of the scale table. The application realizes dynamic follow-up tensioning of the workpiece in the welding process, effectively avoids welding defects, integrates the functions of physical isolation of splashing and efficient absorption of smoke dust sources, improves the operation safety and environmental cleanliness, has high automation, greatly improves the welding efficiency, quality and consistency, and is suitable for the automatic welding operation of the scale table and the reinforcing plate of the automobile scale.

This invention discloses a welding defect segmentation method based on frequency domain information guidance and Mamba sequence modeling, belonging to the field of image processing technology. It includes: constructing a welding defect image dataset; preprocessing the image dataset and dividing it into a training set, validation set, and test set in a 6:2:2 ratio; constructing a welding defect segmentation network based on frequency domain information guidance and Mamba sequence modeling; training the network using the training and validation sets, employing a cross-entropy loss function and the Adam optimizer, and using precision, recall, F1-score, and accuracy as evaluation metrics; finally, inputting the test set into the trained model to output high-precision welding defect segmentation results. This invention significantly improves the accuracy and robustness of welding defect segmentation by introducing wavelet transform to decompose frequency domain information, combining Mamba for efficient sequence modeling of low-frequency components, and utilizing dynamic serpentine convolution to enhance high-frequency details.

This application provides a machine vision-based welding quality inspection method and apparatus, belonging to the field of machine vision and intelligent inspection technology. The method includes: acquiring a target image to be inspected, wherein the target image is an image containing a printed circuit board; inputting the target image to be inspected into a defect detection model for defect detection, and obtaining a defect detection result, which is used to characterize the defect type of the printed circuit board. The machine vision-based welding quality inspection method and apparatus provided in this application can improve the accuracy of welding defect detection.

The utility model relates to laser welding technical field especially relates to a kind of laser welding protective gas pressure detection filtering device, including air inlet pipeline, air inlet pipeline gas inlet port is equipped with pressure controller, air inlet pipeline gas outlet side is equipped with solenoid valve, air inlet pipeline gas outlet port is equipped with pressure sensor, separator and filter are successively installed in air inlet pipeline middle part, air inlet pipeline gas inlet side, separator and filter connection side and filter gas outlet side are all equipped with differential pressure gauge. By making protective gas successively through separator and filter, thereby double interception filtering to the impurity in protective gas, avoid impurity and molten metal reaction to weld defect, etch welding head lens, increase maintenance cost, and avoid impurity block pipeline, cause pressure fluctuation, wherein the setting of differential pressure gauge, the pressure value after protective gas passes through separator and filter is monitored respectively, avoid filter being blocked by impurity and unknow, affect air intake, and then lead to pressure fluctuation.

The present application relates to the technical field of welding defect detection, and particularly relates to an automatic welding un-melted defect detection method; the present application provides an automatic welding un-melted defect detection method, based on multi-modal Transformer, through multi-modal data synchronous acquisition, space-time alignment, feature extraction and cross-modal correlation fusion, the detection precision and reliability are significantly improved; on the embedded platform, the single frame end-to-end inference time is about 10 ms, the power consumption is less than or equal to 40 W, and stable operation can be realized under the condition of 50 Hz sampling frequency, so that real-time monitoring of the welding process is realized.

The application belongs to the technical field of battery cell processing, and discloses a battery cell welding positioning table, which comprises a mounting table, the top of the mounting table is movably connected with a connecting rod, and the top of the connecting rod is fixedly connected with a mounting plate. Through the setting of the clamping blocks, the rectangular frame, the movable block and the correction block, after the battery cell is clamped and fixed by the two clamping blocks, the rectangular frame is lowered, so that the inner surface of the correction block is in contact with the outer surface of the clamping block. At this time, the outer surface of the clamping block will extrude and push the inner surface of the correction block, so that the movable block completes the adaptive displacement adjustment in the horizontal direction synchronously with the correction block, and finally the center axes of the correction block and the two clamping blocks are completely coincident, thereby ensuring that the welding position of the laser welding head and the battery cell to be welded is accurately centered, fundamentally avoiding the accumulation of deviation caused by single positioning, eliminating welding defects such as miswelding, false welding and welding through, and greatly improving the positioning accuracy of the battery cell welding and the product yield.

The application discloses a kind of grain map neural network's weld ultrasonic beam path correction method, it is related to the field of welding structure nondestructive testing, by obtaining the EBSD data of weld area, extract grain orientation, grain boundary type and spatial distribution characteristics, construct grain map structure, and calculate initial propagation time weight based on anisotropic sound velocity model;Using graph neural network to learn end to end for grain node and grain boundary edge features, output corrected edge propagation time weight;The time of flight from element to imaging pixel is obtained by shortest path search, and the time of flight predicted by neural network surrogate model is fused and corrected;Finally, the corrected time of flight is used to perform full focus imaging, and the weld defect image after optimizing the beam path is obtained.The method combines material microstructure characteristics and machine learning model, solves the problem that the beam path description is not fine enough in existing weld ultrasonic testing, significantly improves the accuracy and reliability of defect detection.

This invention provides a welding method and application for circumferential welds on cylindrical bodies, belonging to the field of pipeline welding. The welding method includes the following steps: 1) accessory preparation; 2) pre-welding preparation: including setting the assembly gap, opening the welding bevel, and opening the blunt edge; wherein, when the wall thickness t of the cylindrical body is 10mm≤t≤40mm, the assembly gap g is 3mm~10mm; when the wall thickness t>40mm, the assembly gap g is 0mm; opening a single V-groove or a double V-groove; the bevel angle θ of the single V-groove is 35°~40°; the upper bevel angle θ of the double V-groove is 30°~35°, and the lower bevel angle α is 35°~40°; 3) performing single-pass welding of the circumferential weld on the cylindrical body using gas electric welding; during the welding process, carbon dioxide gas shielded welding is used; 4) post-weld treatment. This invention uses gas electric welding and single-pass welding to reduce welding defects in the circumferential weld of the cylindrical body, improving welding quality and efficiency.

This invention discloses a hydraulic welding fixture for pump body welding, belonging to the field of welding fixture technology. It includes a welding platform with two mounting plates on top and a support arm on top. A pump body is positioned above the welding platform. An internal support mechanism includes a heat-absorbing plate that abuts against the top of the pump body's inner wall. A clamping mechanism includes multiple abutment blocks located at both ends of the pump body. A compensation mechanism includes multiple protrusions located on both sides of the pump body. In this invention, the internal support mechanism dynamically switches between heat absorption and dissipation modes to balance the thermal field. Combined with the synchronous double clamping of the clamping mechanism, positioning accuracy is improved. The compensation mechanism converts thermal expansion displacement into elastic potential energy to achieve displacement compensation. This effectively addresses welding defects of different wall thicknesses while suppressing thermal stress misalignment, ensuring the forming quality and process stability of the pump body welding.

This invention discloses a multi-workpiece induction welding device, comprising: an induction welding device, a conveying platform, and a positioning fixture. A second clamping block is disposed between a second slot seat and a first clamping block. A left fixing rod and a right fixing rod are disposed on the side of the positioning base near the base plate. A limiting block with a through groove is installed on the top of the positioning base and is symmetrically arranged about the processed pipe B. A clamping rod with one end located inside the through groove is elastically connected to the left and right fixing rods through an elastic element. The other end of this clamping rod is located on both sides of the annular groove of the processed workpiece A, thereby clamping its second flange to the second clamping block. A fixing plate with a cover plate rotatably connected to its upper end is installed on one side of the base. The side of the cover plate away from the fixing plate can be fastened to the base. This invention's multi-workpiece induction welding device, while achieving preliminary positioning of the processed workpiece, prevents the welding process from being exposed to the outside air, effectively reducing the possibility of welding defects caused by oxidation at the welding point, and improving welding quality.

This invention relates to the field of intelligent welding control technology, and discloses an intelligent welding control system for precast box girder frames, including an alternating magnetic field module, a laser excitation module, an interference receiving module, a phase-locked extraction module, and a main control module. The alternating magnetic field module generates a magnetic field in the molten pool region and outputs a reference signal, driving micro-oscillations at the solid-liquid interface; the laser excitation module excites ultrasonic waves, and the interference receiving module converts the ultrasonic echoes carrying oscillation characteristics into voltage signals; the phase-locked extraction module uses the reference signal for phase-locked demodulation to extract time-of-flight data; the main control module combines this data with a sound velocity distribution model to calculate the actual weld depth. This invention filters out environmental interference through phase-locked demodulation, improves calculation accuracy through sound velocity compensation, and adjusts the alternating magnetic field to generate electromagnetic lifting force when there is a risk of burn-through, achieving closed-loop intervention and preventing welding defects.

One aspect of the present disclosure provides a method comprising: clamping a first combination of metal workpieces (P1, P2) between a first electrode pair (21, 22); applying a welding current between the first electrode pair to weld the first combination of metal workpieces, specifying a magnitude of the welding current such that a resistance value between the first electrode pair falls within a specified range; measuring the resistance value between the first electrode pair while welding the first combination of metal workpieces based on (i) the magnitude of the welding current and (ii) a magnitude of a voltage between the first electrode pair; and determining, based on the measured resistance value deviating from a specified permissible range, that a welding defect has occurred in the first combination of metal workpieces.

This invention relates to the field of welding inspection technology, and specifically to a method and system for detecting welding defects. The method includes: acquiring a depth map of a workpiece weld; performing adaptive pseudo-color encoding on the depth map to obtain a pseudo-color image, wherein a lookup table is constructed based on the cumulative distribution function of the depth map, and depth values ​​are mapped to color values ​​through the lookup table; calculating pixel-level normal vectors based on the depth map, and performing illumination rendering on the pseudo-color image according to the pixel-level normal vectors to obtain a rendered image; inputting the rendered image into a defect detection network, and outputting defect detection results. This invention, by constructing a lookup table based on the cumulative distribution function of the depth map for adaptive pseudo-color encoding, can automatically adjust the color mapping relationship according to the actual depth distribution of each depth map, making different depth values ​​visually present a more uniform and obvious color difference, effectively improving the visual contrast and feature representation of the depth map.

This invention discloses a machine vision-based weld defect detection device for mechanical manufacturing welded parts, including a worktable, a camera mounted on a support, an image processing device mounted on the front of the top of the worktable, a cleaning mechanism mounted on a U-shaped frame, a water tank mounted on the top surface of the U-shaped frame with a mixing mechanism inside, a cleaning mechanism mounted on a second U-shaped frame, a fixing mechanism on the top surface of a second connecting rod, a connecting block fixed to the bottom of the second connecting rod, a servo motor mounted on the side of the worktable, and a drive mechanism mounted on the output shaft of the servo motor. This invention utilizes the coordinated use of adjusting component one, adjusting component two, the drive mechanism, the cleaning mechanism, and the tilting mechanism to first bring the welded part into contact with the grinding block, facilitating the removal of residual weld slag, spatter, and oxide scale from the weld seam. This prevents residual weld slag, spatter, and oxide scale from obscuring weld defects and improves the accuracy of weld seam detection.

This utility model provides a power battery arc welding fixture, including: a mounting platform, a support mechanism, a first side pressing device, a second side pressing device, a corner pushing device, a support pushing device, and an end support device. The support mechanism protrudes from the mounting platform and is located in the workpiece clamping area. The first side pressing device, the second side pressing device, the corner pushing device, and the support pushing device surround the support mechanism. The end support device supports the corner of the workpiece away from the corner block from the side. The output end of the corner pushing device presses against the bend formed by the connection between the corner block and the triangular block in the workpiece. Both the first and second side pressing devices are used to press the extended edge blocks of the workpiece onto the support mechanism. This power battery arc welding fixture can accurately position and clamp different parts of the workpiece, effectively avoiding shaking and displacement of the workpiece during welding and reducing welding defects.

The application relates to the technical field of ultrasonic flaw detection, in particular to a metal sheet metal welding defect detection device, which comprises a flaw detection main part, an angle adjusting part is installed on the flaw detection main part, and a coupling agent is filled in the angle adjusting part; the angle adjusting part and the flaw detection main part are sealed; a negative pressure maintaining part is installed on the angle adjusting part; a sealing prompting part is installed on the negative pressure maintaining part; a coupling agent pushing part is installed on the angle adjusting part; the rotary shell and the sleeve shell are sealed and fitted, the rotary shell can rotate and adjust in the sleeve shell, the angle of the ultrasonic sensor can be adjusted, the detection flexibility can be improved, the rotary shell and the sleeve shell are filled with the coupling agent, and the sound wave can be efficiently conducted when the rotary shell is rotated and the angle is adjusted; the problem that the existing metal sheet metal welding defect detection device cannot quickly adjust the detection angle in the state of sealing the coupling agent is solved.

The utility model relates to a kind of welding positioning device of agitator blade group, including base, main positioning part, auxiliary positioning part;The main positioning part, the auxiliary positioning part are fixed on the base;The included angle α between the main positioning part and the base is equal to the included angle β between blade and reinforcing bar in the component to be installed;The auxiliary positioning part is set along the length direction of the base two ends.It has beneficial effects: base, main positioning part, the structure design of auxiliary positioning part, such as the relationship setting of included angle α, β, can realize the quick positioning of the component to be installed in agitator, to improve welding efficiency;In addition, the utility model is simple in structure, accurate positioning and stable clamping, greatly reduce blade welding position deviation, weld even, firm, reduce the generation probability of welding defects, such as pore, crack, improve the overall performance and service life of agitator.