157 results about "Fillet weld" patented technology

The invention relates to a welding pose track generation method of a workpiece fillet weld, a medium and equipment. The method comprises the following steps: acquiring a two-dimensional workpiece weld point; performing three-dimensional reconstruction on the two-dimensional workpiece welding seam points to obtain a three-dimensional workpiece welding seam point cloud; a plurality of geometric equations in the three-dimensional workpiece welding seam point cloud are extracted, track regeneration is conducted according to the geometric equations, and an initial welding track and key welding seam point coordinates are obtained; and attitude mapping is conducted according to the prior welding attitude and the key welding seam point coordinates, interpolation calculation is conducted according to the initial welding track, and a final welding pose track is obtained. The problems that in the prior art, the actual space pose of a workpiece cannot be sensed online, the three-dimensional contour of a fillet weld cannot be automatically recognized, and the motion trail of a robot cannot be generated in real time are solved.

The invention discloses a welding seam track identification method for impeller wrap angle welding based on point cloud data, and belongs to the field of machine welding seam identification, and the method comprises the following steps: carrying out filtering, down-sampling and clustering on original scanning point cloud; classifying the point cloud data through a region growing clustering algorithm; determining an optimal interception plane based on principal component analysis, and performing curve fitting on section data to obtain a preliminary main welding seam track; the main welding seam track is projected to a local approximate plane in a segmented mode, and accurate extraction of the main welding seam track is completed; and performing plane fitting and thickness calculation on the wrap angle surface, solving an intersection line in combination with an adjacent local approximate plane, calculating an intersection point of the intersection line and the main welding seam track, and finally generating a wrap angle welding seam track in combination with the direction of the intersection line and the wrap angle thickness. Through cooperative calculation of local plane projection and spatial intersection line solving, the whole process operation from recognition, planning to welding can be automatically completed, and unmanned intelligent welding in the true sense is achieved.

The invention belongs to the technical field of welding seam detection, particularly relates to detection equipment and a detection method, and aims to solve the problem that the detection effect of the existing automobile part welding seam detection equipment on internal corner welding seams located on parts is poor, the following scheme is provided, the detection equipment comprises a tool table, and the bottom of the tool table is fixedly connected with two symmetrical supports; the upper side of the tool table is fixedly connected with a hanging bracket, an ultrasonic probe is arranged outside the hanging bracket, two symmetrical clamps are arranged above the tool table, and the same angle adjusting module is arranged outside the clamps. According to the detection equipment and the method thereof disclosed by the invention, the welding seam on the internal corner of the automobile part can be quickly and conveniently detected, and the welding seam on the internal corner of the part can be completely exposed by adjusting the angle of the part, so that the ultrasonic probe can be effectively attached to the welding seam; the device can fully detect the quality of the welding seam, and the detection effect is improved while the detection precision of the welding seam is ensured.

A fillet weld identification method based on image feature point iterative processing solves the problems of accuracy and robustness of weld identification, and comprises the step of respectively carrying out iterative processing on all fillet weld images with laser lines. The method comprises the following processing steps: carrying out angular point detection on a binary image, obtaining the initial position of an image feature point, segmenting the binary image into a group of regions, setting that each region has only one section of linear laser line, fitting a straight line in each region by using a least square method, and obtaining a linear model of the region; and determining the intersection point of the straight lines in the adjacent areas as a new image feature point, re-segmenting the image by using the new image feature point, carrying out iteration to identify and update the image feature point, terminating iteration when the change of the position of the image feature point is smaller than a specified threshold value, and splicing the welding path welding spots corresponding to all the image feature points into a line according to the image sequence. The method has the beneficial effect that the welding seam position can be identified more accurately. The method can adapt to subtle changes of the welding seam, and the robustness of an identification system is enhanced.

The invention relates to the technical field of automatic welding, in particular to a self-adaptive intelligent welding system based on a dynamic coefficient model. The system comprises an information acquisition module used for acquiring point cloud data of a workpiece to be welded and extracting geometric and physical characteristics; the welding seam recognition module is used for judging the optimal welding seam type; the process parameter generation module is used for activating the single-channel fillet weld, multi-layer and multi-channel or groove welding sub-module through a process calculation agent and generating initial process parameters by utilizing a built-in dynamic coefficient model; the welding execution and feedback module is used for issuing a process instruction and performing real-time fine adjustment on voltage, current or speed based on a sensing signal linkage process coefficient; and the incremental learning module is used for continuously updating the model coefficient by analyzing the bias of the positive sample data packet. The full-closed-loop intelligent welding method solves the problems that traditional welding depends on a static expert database and cannot cope with assembly errors, complex heat accumulation and the like, and full-closed-loop intelligent welding from geometric perception to parameter generation and real-time correction is achieved.

The invention relates to the technical field of intelligent welding, in particular to a steel structure fillet weld intelligent identification method and system based on 3D vision, and the method comprises the steps: obtaining a point cloud data set of a workpiece, and extracting point cloud data of a weld region from the point cloud data set; dividing the welding seam area into a plurality of welding seam sub-areas, wherein one welding seam sub-area corresponds to one independent welding seam; carrying out welding seam coarse skeleton extraction on each welding seam sub-region, and carrying out merging processing on the welding seam coarse skeletons of which the distance between end points is smaller than a threshold value; and on the basis of the combined welding seam coarse skeletons, welding seam fine skeleton point set extraction is conducted, and a welding seam path expression is obtained based on welding seam fine skeleton point set fitting. The method solves the problem that an existing algorithm needs an operator to repeatedly adjust a threshold parameter according to experience, resulting in lack of adaptive ability, and solves the problems that the calculated amount is large, the speed is low and the real-time requirement of an industrial site cannot be met when the workpiece point cloud data is processed.

The invention belongs to the technical field of ship building and repairing, discloses a stainless steel sheet welding deformation control method, and solves the problem that welding deformation of a liquid collecting tray of a sheet stainless steel flat plate structure is difficult to control. Comprising the steps that a flat steel bracket is used in the transportation process, and oily paper is used for packaging; during storage and stacking, putting on a flat ground; during hoisting, an air suction cup or a hoisting plate steel clamp is used for carrying out single-piece hoisting; a hole is formed through laser cutting; before fillet weld welding, permanent toggle plates are assembled between adjacent steel plates, and positioned welding is carried out; before butt joint welding, permanent flat iron is additionally arranged on steel plates on the two sides of a welding seam on the back face of the butt joint welding seam, and staggered positioned welding is conducted on the flat iron and the steel plates; a positioning code plate stretching across the welding seam is additionally arranged on the front face of the butt welding seam; in the welding process, carbon dioxide gas shielded welding is adopted, and a centering and sectioning back welding method is adopted in the welding process of all welding seams. The method is easy and convenient to operate, wide in application range, high in efficiency and low in cost.

The utility model relates to the technical field of ultrasonic phased array nondestructive testing, in particular to a phased array pressing assembly for a welding seam of a connecting pipe. The welding seam detection device comprises a detection device used for detecting a welding seam between a cylinder body and a connecting pipe, the tail end of the detection device is provided with a pressing assembly facing the welding seam, and the pressing assembly comprises a fastening cover plate which is fixed near the welding seam through the detection device; the encoder comprises an encoding sensor and a pulley, and the pulley rolls along the surface of the cylinder along with the detection device; one end of the elastic buffer block is connected with the encoder through a spring, and the other end of the elastic buffer block is an expanded buffer block and abuts against the weld joint; the probe is connected with the encoder through a movable joint, and a plurality of line marks are drawn on the periphery of the connecting pipe. According to the utility model, through improving the structure of the pressing assembly, the automatic detection of the fillet weld on the outer wall of the barrel thick-wall connecting pipe is realized, so that the detection data is more accurately acquired, the detection efficiency is improved, the labor intensity of detection personnel is reduced, and the detection universality is enhanced.

The application provides a nuclear reactor core device and a preparation method thereof, and belongs to the technical field of material welding. The preparation method of the nuclear reactor core device comprises the following steps: preparing a rib plate assembly, a W-shaped plate assembly and a C-shaped plate assembly; assembling multiple W-shaped plate assemblies and C-shaped plate assemblies into a whole circle and fixing the same by using inner and outer support tools, performing automatic welding by using a laser symmetrical welding method, and forming a W / C-shaped plate assembly; synchronously and alternately welding the W / C-shaped plate assembly on the inner and outer sides by using two automatic wire filling welding guns by using a double-sided layered symmetrical welding method, and realizing the connection of the W / C-shaped plate assembly with a bottom plate and a top plate; performing automatic butt welding of an outer half-ring plate by using laser welding and laser wire filling welding; and finally, welding internal fillet welds and performing nondestructive testing. By the cooperation of laser welding, automatic MIG welding, special tools and a symmetrical welding sequence, high-quality and high-efficiency automatic welding of the core containment vessel is realized, and welding deformation is effectively controlled.

This application relates to the field of weld inspection, and in particular to a phased array inspection method and auxiliary tool for fillet welds. The method includes the following steps: selecting the inspection instrument and probe, selecting the coupling agent, setting the focusing rule, preparing a comparison test block, scanning the comparison test block, selecting the scanning method and scanning the workpiece to be inspected, measuring defect size parameters, evaluating the defect, and locating the defect. This application uses a phased array detector to determine and evaluate defect parameters and locate the defect in water-cooled wall fillet welds, thereby enabling the detection of defect conditions in spiral water-cooled wall fillet welds during use and providing a basis for maintenance. An auxiliary tool for phased array inspection of fillet welds is also disclosed, providing assistance for inspection scanning and facilitating the inspection of fillet welds in different locations, thus promoting monitoring work.

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.

The present application relates to the technical field of magnetic particle flaw detection, and particularly relates to a magnetic yoke for fillet weld, a detection device and a detection method. The present application provides a detection device for fillet weld, which comprises a magnetic yoke, the magnetic yoke comprises a first trapezoidal ring and a second trapezoidal ring, the first trapezoidal ring and the second trapezoidal ring are connected through a cross beam; the first trapezoidal ring and the second trapezoidal ring are provided with openings on the same side and the short sides are arranged on the same side, the straight line distance between the long sides of the first trapezoidal ring and the second trapezoidal ring is less than the straight line distance between the short sides; the openings of the short sides and the long sides of the first trapezoidal ring and the second trapezoidal ring are provided with magnetic poles; the current comprises full-wave rectified current and alternating current, the short sides of the first trapezoidal ring and the second trapezoidal ring are connected with different currents, and the long sides are connected with different currents; two sides of the first trapezoidal ring and the second trapezoidal ring are connected with different currents. The present application aims to solve the technical problem that there is no magnetic yoke and detection device for detecting fillet weld defects in the prior art.

The application relates to a head device and method for welding an angle weld joint between a longitudinal rib and a ship body plate, and belongs to the technical field of ship manufacturing welding equipment. A horizontal tracking wheel of a tracking wheel assembly cooperates with a rotating shaft to realize Rz rotating freedom, and the horizontal tracking wheel is self-adaptive to lateral bending of the longitudinal rib; a vertical tracking wheel of the tracking wheel assembly cooperates with elastic floating of a spring mechanism to be self-adaptive to thickness change and local unevenness of the bottom plate; the two cooperate to enable a welding gun of a gun adjusting assembly to track a weld joint track in the horizontal direction and the vertical direction in real time. The application solves the problem that the tracking mode is single and difficult to adapt to complex working conditions in the prior art, and significantly improves welding quality.

The invention belongs to the technical field of ship structure manufacturing and welding processes, and discloses a geometric dimension control and parameter optimization method for ship body angle welding and butt welding, which comprises the following steps: S1, constructing a classified welding process database and carrying out data preprocessing; s2, constructing and training a neural network forward prediction model special for a welding seam; s3, the process parameters are intelligently and optimally adjusted through the neural network forward prediction model special for the welding seam, and an optimal process parameter combination is output; and S4, performing experimental verification on the optimal process parameter combination output in the step S3, and performing closed-loop evolution on the optimized fillet weld time sequence enhanced neural network and butt weld time sequence enhanced neural network. According to the method, the design variable, which directly determines the material consumption, of the geometric dimension of the welding seam is used as an accurate control target, and direct and active control over the welding cost is achieved on the premise that the welding quality is guaranteed through intelligent reverse optimal adjustment of the technological parameters.

The application provides a steel structure component laser cutting and welding integrated equipment, and relates to the technical field of laser processing, comprising a material plate conveying frame, a welding gantry and a cutting gantry arranged in sequence, wherein the material plate conveying frame is internally provided with a conveying mechanism with adjustable diameter and an adjustable guide gantry to adapt to the continuous conveying and preliminary positioning of different specifications of H-shaped steel, the welding gantry completes the welding of the fillet weld when the H-shaped steel continuously passes, and the cutting gantry realizes the accurate speed synchronization with the conveying H-shaped steel through the speed detection closed-loop control system, the driving gear meshing with the fixed convex column and the follow-up frame at the bottom of the cutting gantry, so that the synchronous follow-up laser cutting is completed under the condition that the H-shaped steel is continuously conveyed, the problems of production interruption and low efficiency caused by the cutting process in the prior art are solved, and the integrated, continuous and intelligent high-efficiency production of the H-shaped steel welding and cutting is realized.

The invention relates to a sliding beam design method considering rail collaborative stress, and aims to solve the technical problems that in traditional sliding construction, the rail effect is ignored, the sliding shoe counter-force non-uniform control standard is lacked, and the design construction process is fuzzy. According to the method, uniform counter-force of a sliding shoe is obtained through finite element analysis, and the sliding beam section and a supporting system are optimized in combination with multi-working-condition trial calculation; a sliding shoe counter-force non-uniform control standard is formulated based on the actually measured elevation difference and the theoretical deflection; carrying out shear resistance (Vtotal = Vslippage beam + Vtrack) and bending resistance checking calculation on the combined section of the slippage beam and the track, and quantifying the stress contribution of the track; and finally, fillet weld connection and clamp plate construction are adopted. Cooperative work of the track and the sliding beam is achieved. The method is suitable for slippage projects such as long-span bridges and venue roofs, the structural safety and the construction reliability can be remarkably improved, the rework cost is reduced, and the method has high engineering application value.

A steel plate component according to the present invention is an arc-welded joint 11 in which a steel plate 13 and a steel plate 15 are lap fillet arc welded together, and which is provided with a weld toe portion 17a that is impacted using an impact pin 1, wherein the weld toe portion 17a has a minimum radius of curvature of 0.65 mm or less in a cross section parallel to the plate thickness direction of the steel plate 15 and a Vickers hardness of 220 Hv or more, and a metallographic structure of the weld toe portion 17a has a crystal structure including crystal grains in a body-centered cubic lattice or a body-centered tetragonal crystal lattice, and includes deformation twins having a thickness of 50 nm or less.

The application discloses a large bearing retainer copper / steel heterogeneous material welding process and belongs to the technical field of non-ferrous metal heterogeneous welding. The process steps are as follows: a welding flux is applied to the edge of the contact surface of an aluminum bronze pad and alloy steel, the pad is assembled and fixed on a steel body, after 80-150 DEG C preheating treatment, a tungsten inert gas welding is used for filling wire welding, and through suitable welding parameters, the filler metal and the two side base materials are fully intermelted to form a weld. The application can solve the problems of weld cracks and incomplete fusion of the aluminum bronze-alloy steel fillet weld and groove weld in the structure of the large bearing retainer, can effectively improve the root shape, greatly reduce the root stress concentration, finally significantly improve the toughness of the copper / steel heterogeneous weld, and improve the service safety and reliability of the retainer. The process disclosed by the application is not limited to the aluminum bronze-alloy steel composite retainer heterogeneous welding of the large bearing, and is also very suitable for solving the root defect problem of the aluminum bronze partial penetration joint.

A lap fillet weld joint and a lap fillet weld joint manufacturing method are provided. On a side of a first edge, a first metal plate is provided with a bulging portion that has an internal space of a prescribed size, and a second metal plate has a protruding portion that faces to the bulging portion and can be inserted into the bulging portion. In a state in which the protruding portion has been inserted into the bulging portion, the first metal plate and a second edge of the second metal plate are welded, and a first weld bead is formed.

The utility model provides a detection test block for a fillet weld of a tube socket, and belongs to the technical field of detection test blocks. A detection test block for a tube socket fillet weld comprises an adjusting box, a first test block piece located at one end of the adjusting box and a second test block piece located at the other end of the adjusting box, first grooves are symmetrically formed in the two sides of the adjusting box, first guide rails are installed on the inner wall of each first groove in an up-down symmetrical mode, and second guide rails are installed on the inner wall of each first groove in a left-right symmetrical mode; first through holes are symmetrically formed in the upper portions and the lower portions of the two sides of the adjusting box, a plurality of second through holes are formed in the upper surfaces and the lower surfaces of the first test block piece and the second test block piece, and sliding seats are arranged at the ends, close to the inner wall of the first groove, of the first test block piece and the second test block piece; and the sliding seat is in sliding fit with the first guide rail and the second guide rail. The utility model has the advantage of higher practicability.

The utility model discloses a hot-blast stove shell cracking welding repair structure which comprises a hot-blast stove shell with a cracking position, the cracking position of the hot-blast stove shell is welded to form a cracking repair welding seam, and a plurality of reinforcing steel plates are evenly and vertically welded on the hot-blast stove shell along the cracking repair welding seam at intervals. And two-side fillet welds for connecting the hot-blast stove shell with the reinforcing steel plates are formed on two sides of each reinforcing steel plate. The welding repair structure for cracking of the furnace shell of the hot blast stove is simple in structure, easy to implement, low in cost, good in effect and capable of effectively solving the problem that welding repair strength is not enough after the furnace shell of the hot blast stove is cracked.

A lap fillet arc welding method including joining a corner formed by at least two steel sheets, wherein during the joining: the joining is performed using short-circuit transfer, a welding target position is displaced from the corner formed by the at least two steel sheets, and present at an end of an upper sheet of the at least two steel sheets, by 0.2 mm or more and 1.8 mm or less in a direction perpendicular to a weld seam of a lower sheet of the at least two steel sheets, a gas containing 98 vol % or more Ar is used as a shielding gas, and a weld metal height H (mm) and a weld metal width W (mm) of a weld satisfy expression (1): 0.2≤H / W≤1.2 . . . (1).

The utility model discloses a gas protection device for the back of a fillet weld of a connecting pipe. The gas protection device comprises a gas circulation device, a weld joint matching mechanism, a clamping ring, a gas dispersion device, a fixing ring and a gas backflow regulator. The welding seam matching mechanism is installed on the gas circulation device, the clamping ring is installed in an annular groove in the welding seam matching mechanism and can be clamped and fixed to the inner wall of a main body workpiece, the gas dispersion device is installed at a gas outlet in the welding seam matching mechanism and fixed through a fixing ring, and the gas backflow regulator is installed at the tail of the gas circulation device. And gas outflow can be controlled by adjusting the position through the threads. The device is suitable for a pipe fillet weld structure needing full penetration welding, protective gas can evenly flow through the back face of a weld joint to form a stable and continuous atmosphere, and therefore good weld joint quality is obtained, the using amount of the protective gas can be effectively reduced, manufacturing cost is reduced, and production efficiency is improved. In addition, operation is simple, and the modular design has high universality.

The beam-column connecting structure comprises a rectangular steel pipe assembly located in a beam-column joint area, a plurality of welding ribs are welded to the peripheral sides of the inner walls of the two ends of a rectangular steel pipe in the rectangular steel pipe assembly respectively, and an upper inner partition plate and a lower inner partition plate are fixedly arranged in the rectangular steel pipe. Arc through holes are formed between four corners of the upper inner partition plate and the lower inner partition plate and the rectangular steel pipe; penetrating ribs are further arranged at the corners and the positions close to the corners of the rectangular steel pipes and penetrate through arc through holes in the four corners of the upper inner partition plate and the lower inner partition plate to penetrate through the beam-column connecting structures to connect the upper prefabricated column and the lower prefabricated column; a lug plate is welded to the side, connected with the beam end H-shaped steel, of the rectangular steel pipe, a web of the beam end H-shaped steel is fixedly connected with the lug plate, and the upper flange end and the lower flange end are fixedly connected with the rectangular steel pipe in a welded mode. The problems that the welding number of column longitudinal bars and rectangular steel pipes is large, and column corner longitudinal bars are difficult to overlap and weld on the two faces of the corners of the steel pipes are solved. Connection between the concrete prefabricated parts is converted into steel structure connection, and connection is simple, convenient and efficient.

The application belongs to the technical field of welding process and relates to a welding process test sampling ruler and a sampling method thereof.The welding process test sampling ruler comprises an upper main ruler (100), a lower main ruler (200) and a middle soft ruler (300). The upper main ruler (100) comprises an upper main ruler body (101), an upper main ruler suction disc fixer (102), an upper main ruler magnetic strip (103), an upper fixed buckle groove (104), an upper fixed buckle (105) and an upper main ruler scale (106). The lower main ruler (200) comprises a lower main ruler body (201), a lower main ruler suction disc fixer (202), a lower main ruler magnetic strip (203), a lower fixed buckle groove (204), a lower fixed buckle (205) and a lower main ruler scale (206). The welding process test sampling ruler and the sampling method thereof have the advantages of simple structure, convenient use, suitability for sampling of welding test plates with various angles, prevention of inclination of positioning and marking lines during sampling, prevention of deviation of sampling positions and guarantee of accuracy of fillet welding approval tests.

The subject of the application is an anchor wrench, which consists of a wrench base (1) with an internal hexagonal socket (1.1), a connecting tube (2) with a smooth internal through hole (2.1), a hexagonal outlet socket (3), and a wrench base (4) in the form of a hexagonal shank, comprising: a sleeve inseparably connected to a through hexagonal guide. Furthermore, the anchor wrench, according to the design, is provided with a wrench base (4) in the form of a hexagonal shank embedded in a hexagonal guide. The wrench base (1) is inseparably mounted on one end of the connecting tube (2), while the outlet socket (3) is inseparably mounted on the other end of the tube. The wrench base (4) is connected to the outlet socket (3) via an internal fillet weld.

The application relates to the technical field of tank welding, in particular to a high-temperature storage tank annular fillet welding process, which comprises the following steps: S1, performing average partition on diagonal fillets according to the thickness and curvature radius of the wall plate of a tank welding position; S2, lifting the wall plate to a specified distance from the bottom plate, and then performing welding on positioning blocks according to the partition quantity; S3, determining a skip welding construction sequence after segmenting the fillet; S4, performing base layer welding, simultaneously welding a first position, then simultaneously welding a second position, until the cumulative thickness of the fillet reaches a target value, and then performing fillet quality detection; S5, performing filling layer welding, welding at the first position on the basis of the base layer, then welding at the second position on the basis of the base layer, and repeating until the cumulative thickness of the fillets of the first position and the second position both reaches delta; and S6, performing cover layer construction; the application has the effect that the calculation of the welding partition quantity can guarantee the rationality of the positioning block quantity.

The invention provides a robot laser hybrid welding method for a T-shaped material. The robot laser hybrid welding method comprises the steps that 1, an assembled T-shaped connector is placed on a test bed; 2, the robot is operated to move to a designated position; calling out a related program in the demonstrator, and calling out a corresponding welding angle; step 3, adjusting the position and parameters of a position searching laser; 4, setting laser parameters; 5, welding parameters are set; 6, adjusting the distance between the light filaments; 7, calling a fillet weld welding program; 8, the welding speed is set; and 9, the program is operated, and a welding product is obtained. The method fundamentally solves the problem of rapid positioning of the welding incidence angle in the traditional process, and is flexible to adjust. Conventionally, the special design of a welding joint is not needed, a large amount of manpower, material resources, time and financial resources are saved, the debugging progress is greatly accelerated, and the internal quality of a welding seam is greatly improved.

The invention discloses a welding process of a marine atmosphere corrosion resistant steel plate, which comprises the following steps of: aiming at plate butt joint, adopting a groove form with a V-shaped groove, a truncated edge size of 2mm and a groove angle of 30 degrees, adopting flux-cored wire CO2 gas shielded semi-automatic welding to carry out backing welding or submerged-arc welding to carry out filling and cosmetic welding, and carrying out back gouging treatment before reverse welding; for T-shaped penetration fillet welds and T-shaped partial penetration fillet welds, a groove form with a K-shaped groove, a truncated edge size of 2mm and a groove angle of 45 degrees is adopted, and flux-cored wire CO2 gas shield semi-automatic welding is adopted; for T-shaped fillet weld ship position welding, grooves are not formed, and submerged automatic arc welding is adopted; aiming at T-shaped fillet weld flat position welding, no groove is formed, and flux-cored wire CO2 gas shielded semi-automatic welding is adopted. According to the process, the requirement that the mechanical property of a welding joint of the marine atmospheric corrosion resistant steel is not lower than that of base metal is met, meanwhile, the corrosion resistance of a welding seam is equivalent to that of the base metal, and the requirement for corrosion resistance of components in the marine atmospheric environment is met.

This application discloses a method, equipment, medium, and product for detecting defects in fillet welds of B-type sleeves in oil and gas pipelines, relating to the field of non-destructive testing. The method includes constructing a simulation model and a phased array ultrasonic probe model in simulation software, and performing sound beam propagation simulation and defect response simulation on the phased array ultrasonic probe model and the simulation model to obtain the optimal placement position and optimal focusing law parameters of the phased array ultrasonic probe. The simulation model includes a simulation model of the workpiece under inspection and preset defects on the fillet weld. The simulation model of the workpiece under inspection includes: a B-type sleeve, the fillet weld, and the main pipeline. The B-type sleeve is welded to the main pipeline via the fillet weld. Based on the optimal placement position and optimal focusing law parameters of the phased array ultrasonic probe, the fillet weld of the workpiece under inspection is scanned using phased array ultrasonic scanning to achieve fillet weld defect detection. This application can improve the reliability of the detection results.