249 results about "Fillet weld" patented technology

The invention relates to a point cloud recognition method, device and equipment for automatic welding of a fillet weld of a lifting lug workpiece, and the method comprises the steps: obtaining a scene point cloud of an actual workpiece placement scene, and extracting an actual workpiece point cloud from the scene point cloud; according to the actual workpiece point cloud, a registration algorithm is adopted to calculate a target homogeneous change matrix of the actual workpiece point cloud and the template workpiece point cloud; correcting a preset scanning track of the actual workpiece based on the target homogeneous change matrix to obtain an adjusted scanning track; and according to the adjusted scanning track, welding seam area point cloud information is obtained, and welding seam points are recognized based on the welding seam area point cloud information and the straight line intersection point angle welding seam recognition method. According to the whole scheme, the welding seam point can be accurately recognized, and finally accurate point cloud recognition of automatic welding of the lifting lug workpiece fillet welding seam is achieved.

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 utility model provides a placement type fillet weld ultrasonic phased array detection automatic scanning device. The placement type fillet weld ultrasonic phased array detection automatic scanning device comprises a fixing plate, a detection mechanism and a fixing mechanism, notches are formed in the lower ends of the fixing plates; the detection mechanism comprises four limiting gears, a gear ring, a telescopic rod and a detection probe, the four limiting gears are rotatably connected to the fixing plate around the four corners of the notch, the gear ring is meshed with the four limiting gears, the telescopic rod is connected to the gear ring, and the detection probe is arranged at the movable end of the telescopic rod; the fixing mechanism comprises a mounting frame fixedly arranged on the fixing plate, two clamping jaws movably connected to the mounting frame, two transmission rods with one ends movably connected with the two clamping jaws in a one-to-one correspondence mode, and an electric push rod movably connected with the other ends of the two transmission rods. According to the embodiment, the detection probe is driven by the gear ring to surround the to-be-detected pipeline, so that the convenience of the device is improved. And the telescopic rod adaptively stretches out and draws back to ensure the consistency of the distance between the detection probe and the welding seam and improve the detection quality of the welding seam.

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 discloses a stiff steel rib column welding seam detection device, and relates to the technical field of welding seam detection devices. A stiff steel rib column welding seam detection device comprises fixing rods, two ends of each fixing rod are respectively connected with a mounting rack, the fixing rods are symmetrically arranged on the mounting racks, and the mounting racks are connected to H-shaped steel; the sliding frame is connected to the fixing rod in a sliding mode, and a weld joint movable detection area is formed between the two mounting frames; by arranging the wave guide rail, the ultrasonic probe can automatically and transversely swing along a wave path, the welding seam detection effect can be improved for H-shaped steel, automatic spraying of a coupling agent can be achieved by means of design and linkage of the wave guide rail, and even by means of combination of the wave guide rail and the L-shaped scraping plate, the welding seam detection efficiency is improved. The effect of uniformly smearing the coupling agent in a wave path is achieved; and meanwhile, through the arrangement of the wave guide rail, whether the welded wing plate is bent and deformed or not can be automatically judged in the fillet weld detection process, and then the welding quality of the H-shaped steel is improved.

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.

The utility model belongs to the technical field of nondestructive testing, and particularly relates to a phased array scanning frame device for detecting plug-in fillet welds, which is characterized in that a clamping mechanism realizes the action of clamping a sliding plate to adjust the clamping thickness of a device; the moving mechanism realizes the action of adjusting the position of the phased array ultrasonic probe by the upper moving plate; and the angle adjusting mechanism realizes the action of rotating the bottom plate to adjust the angle of the phased array ultrasonic probe. According to the phased array scanning frame device for detecting the plug-in fillet weld, a clamping motor, an upper moving motor and a lower moving motor are synchronously controlled through a PLC, a clamping sliding plate is adjusted to enable the device to be stably connected to the surface of a detected workpiece, movement of an upper moving plate is adjusted, the position of a phased array ultrasonic probe is changed, and the angle of a rotating bottom plate is adjusted; the angle of the phased array ultrasonic probe for detecting the welding seam is changed, the elliptical track of the inserted welding seam is detected, and the technical problem that an existing scanning device cannot detect the elliptical track of the inserted welding seam is solved.

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 provides an assembly line system for building a B-type cabin middle group sheet body. The assembly line system comprises a feeding unit, a laser cleaning and scribing unit, a friction stir welding plate splicing unit, a ray detection unit, an assembling and welding unit and a discharging unit which are connected in sequence. During construction, the bottom plate plates for splicing the bottom plate are hoisted to an assembly line one by one, the laser cleaning and scribing unit is used for cleaning and polishing a welding bead and scribing various mounting line indication lines, then the friction stir welding plate splicing unit is used for carrying out butt joint on the bottom plate plates one by one according to a plate splicing sequence, and the bottom plate of a middle group sheet body is synthesized; a butt welding seam of a bottom plate is subjected to flaw detection of the ray detection unit and then flows to the assembling and welding unit, T rows and rib plates are subjected to falling assembly according to the positions of an installation line and an indication line through the assembling and welding unit, fillet weld arc welding is carried out after assembly is completed, and finally discharging of a whole middle-group sheet body is carried out through the discharging unit.

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 discloses a large branch pipe streamline variable-diameter special-shaped sleeve for repairing and blocking a tee joint and a forming method.The large branch pipe streamline variable-diameter special-shaped sleeve for repairing and blocking the tee joint comprises a main pipe, a branch pipe is arranged on the side wall of the main pipe, and the two ends of the main pipe are symmetrically arranged relative to the axis of the branch pipe; one end, far away from the main pipe, of the branch pipe is connected with one end of the nipple; a straight pipe section is arranged at the end, away from the branch pipe, of the main pipe, and a reducing section is arranged at the position, between the straight pipe section and the branch pipe, of the main pipe. According to the special-shaped sleeve, the problems that an existing sleeve for repairing is large in welding workload, and fillet welds are prone to cracking are solved.

The invention relates to the technical field of exhaust pipe flange welding, and discloses an automobile exhaust pipe flange welding device which comprises a workbench body, a dust collecting assembly used for collecting smoke dust is arranged in the workbench body, and a residue collecting mechanism used for collecting residues is arranged in the dust collecting assembly. An alignment assembly used for positioning a pipeline and a flange is arranged in the workbench body, the universal pipe can be matched with the adjustable dust collection cover, the exhaust fan and the water tank, and smoke dust can be guided into water through the dust guide pipe to be precipitated; slag collecting cloth is hung on a positioning hook to achieve solid-liquid separation, filter cloth intercepts residual smoke dust, welding slag falls into a water tank through a slag feeding hopper to be cooled, a net plate and a storage frame are subjected to solid-liquid separation, a handle is used for rapid extraction, a force application wheel drives a rubber belt to drive a pipeline to rotate, and no-dead-corner welding seams are achieved through rotary welding. And the pipeline is prevented from deforming due to hard contact when the pipeline is clamped again through the softness of the rubber belt.

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 invention relates to the technical field of welding, in particular to an in-service steel bridge U-rib assembly outer weld seam welding throat crack double-face welding repairing method which comprises the following steps that firstly, a U-rib inner welding construction process hole is formed in the inlaying section position, close to a crack, of a U rib; secondly, cleaning and derusting are conducted on an inner corner to-be-welded area, corresponding to the crack, of the U rib; thirdly, elevation angle welding bottom sealing is conducted on the inner angle, corresponding to the crack, of the U rib; fourthly, welding throat cracks are removed from the outer fillet weld of the U-shaped rib, a U-shaped groove is formed, and the two sides of the U-shaped groove are cleaned till the natural metal color appears; fifthly, the inner wall of the U-shaped groove is checked, and it is ensured that cracks are thoroughly removed; sixthly, the inner wall and the periphery of the U-shaped groove are cleaned up; and seventhly, filling welding is conducted on the U-shaped groove through a multi-layer and multi-pass arc welding technology. According to the method, welding is conducted from the inside first, then repairing is conducted from the outside, the problem of welding throat cracking is effectively and radically solved, and the repairing effect is obvious.

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 utility model relates to a generator rotor welding joint, which is characterized in that a first conductor and a second conductor at the joint of a generator rotor are arranged at an interval, and the joint is connected with the first conductor and the second conductor and comprises at least two joint blocks which are perpendicular to each other; wherein one group of joint blocks covers the butt joint surfaces or the surfaces adjacent to the butt joint surfaces of the first conductor and the second conductor, a welding seam is filled in an area enclosed by the first conductor and the second conductor, and the other group of joint blocks covers the surfaces adjacent to the butt joint surfaces of the first conductor and the second conductor; a fillet weld is filled between the joint block and the non-flush position of the first conductor or the second conductor. Compared with the prior art, the requirements of mechanical strength and conductivity of the generator rotor connecting part are met.

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 the field of steel beam hoisting construction equipment, in particular to a steel beam hoisting construction support which comprises a bearing beam, the bearing beam is transversely arranged on concrete beams, loads are dispersed to the concrete beams at the two ends through the bearing beam, and the bearing beam and the concrete beams are fixed through chemical anchor bolts. The support base is horizontally placed on the upper end face of the bearing beam, the support base and the bearing beam are fixed through full-circle angle welding, the support splicing units are lattice support units and longitudinally connected to the top of the support base in a lap joint mode, and the support splicing units and the support base are combined to form a support body. The operation height of the support body can be controlled by selecting the splicing number of the support splicing units, a jig frame main beam is connected to the upper end face of the top support splicing unit, and an adjusting stand column for finely adjusting the supporting height is installed in the middle of the top of the jig frame main beam. The method has the characteristics of simple construction process, short construction period and capability of quickly adjusting the gravity center of the bracket.

The invention belongs to the technical field of in-service repair of pressure pipelines, particularly discloses a B-type sleeve ring fillet weld welding method based on phase change stress compensation and application of the B-type sleeve ring fillet weld welding method, and aims to solve the problem of cold cracks caused by residual stress concentration at weld toes. Through specific alloy element ratio and control, the special welding wire with excellent cold crack resistance can be prepared through the design method. Comparative analysis results show that in the deposited metal welded by adopting the low-temperature phase change welding wire and the matched welding process, the martensite structure content (55-60%) is slightly higher than that of the deposited metal welded by using the welding wire of a control group; the level of welding residual stress generated by the special welding wire in a welding line area (especially a welding site area) is obviously lower than that of a control group welding wire, and the risk of generating cold cracks at the weld toe of the B-type sleeve repair ring fillet welding line is obviously reduced in cooperation with optimization of a welding line structure. And an effective technical solution is provided for improving the welding quality and the service reliability of B-type sleeve repair.

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.

The utility model discloses a fillet weld measuring device for a narrow space, and relates to the technical field of measuring devices, the fillet weld measuring device comprises a detection ruler, an auxiliary detection tool and a locking device, the auxiliary detection tool is provided with a clamping groove and an abutting pointer, the detection ruler is movably clamped in the clamping groove, and the abutting pointer is clamped in the clamping groove. The locking device is connected with the auxiliary detection tool and locks and fixes the detection ruler in the clamping groove, and during measurement, the end of the abutting pointer abuts against the edge of the fillet weld; the size of the measuring device is smaller than that of an existing welding scale, the measuring device can extend into a narrow space to measure the fillet weld, operation is simple and convenient, the detection accuracy of measurement is improved, and the problem that the fillet weld with the narrow internal space cannot be measured through the welding scale, and the measuring efficiency is high is effectively solved. The technical problems that displacement is prone to occurring when only a steel ruler is used for measurement, the steel ruler cannot be effectively attached to a welding seam, and measurement data are inaccurate are easily caused are solved.

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.