1126 results about "Thick plate" patented technology

This invention discloses a process for controlling the shape of A514GrQ extra-thick plates for offshore platforms. It uses 800-1000mm thick steel ingots, and after removing and cleaning the ingot risers, ensures uniform thickness of the ingot body, laying the foundation for obtaining steel plates with excellent flatness. The heating process is optimized to ensure uniform heating of the ingot head, middle, and tail, facilitating uniform deformation during rolling. Homogenized rolling is employed to reduce cooling water usage, limit the reduction per pass, and control the final rolling temperature, avoiding uneven internal stress and shape rebound in the steel plate. The final product is a 180-210mm thick steel plate with a maximum flatness ≤8mm and a lateral flatness ≤4mm within a length of 10000mm and a width of 2400mm, significantly reducing subsequent leveling tasks.

The invention discloses a weld joint three-dimensional structure detection device based on vortex laser, and relates to the field of laser welding, and the weld joint three-dimensional structure detection device comprises a vortex laser generation system used for generating and emitting vortex laser; the image acquisition unit is used for collecting returned laser data projected to the welding seam and carrying out dynamic scanning and data acquisition; the motion control and feedback system is used for adjusting the relative position of the laser welding head and the workpiece in real time and dynamically adjusting parameters such as welding power and scanning speed according to the collected data result; and the data processing and analyzing platform is used for carrying out image processing and feature extraction on the collected multi-dimensional data and modeling the morphology of the welding sample. The vortex laser serves as a light source for welding seam detection, high-precision, high-depth, multi-parameter and strong-interference-resistance three-dimensional welding seam modeling is achieved, the problems that in the long and thick plate welding process, welding seam detection parameters are few, precision is low, and real-time adjustment cannot be achieved are solved, and meanwhile the device has the performance characteristics of being high in detection precision, high in efficiency and comprehensive in structural parameter.

The invention relates to the technical field of welding, in particular to a double-laser double-swing auxiliary MIG electric arc thick plate narrow gap welding method and device, and the welding method specifically comprises the following steps that S1, initial positioning is conducted; s2, performing double-laser cross scanning preheating; s3, MIG electric arc auxiliary fusion is conducted, specifically, MIG electric arc is introduced on the basis of a molten pool formed by laser, so that the molten pool is stably combusted under laser induction, the common molten pool effect is achieved, and complete fusion of the side wall and the root of the groove is promoted; s4, real-time monitoring and adjustment in the welding process are conducted, specifically, in the welding process, the state of a molten pool and the welding quality are monitored in real time, and the laser power, the electric arc parameters and the welding speed are dynamically adjusted; and S5, welding seam quality detection. The double-laser-assisted MIG electric arc is used, the stability of the MIG electric arc is remarkably enhanced, the advantage of MIG filling efficiency is brought into play, and the welding efficiency and the welding quality are effectively improved.

The invention discloses an intelligent suspension conveying device for laminated glass production, and relates to the technical field of intelligent suspension conveying devices, the intelligent suspension conveying device comprises a guide rail frame and a plurality of suckers, the guide rail frame is slidably provided with a suspension frame, and the suspension frame is provided with a moving structure for driving the plurality of suckers to move. The device has the advantages that the device has the capacity of adapting to plane glass and curved glass, the adsorption angle and the fitting degree can be adjusted in a self-adaptive mode according to the arc-shaped contours of the laminated glass with different curvatures, the stability in the hanging and conveying process is guaranteed, the damage risk caused by unstable adsorption of a traditional device is avoided, frequent manual setting operation is not needed in the whole process, and the production efficiency is improved. Meanwhile, the adsorption force can be intelligently matched with the thickness of the glass, so that the ultra-thin glass is prevented from being pressed and damaged, the adsorption failure of the thick plate glass is prevented, manual parameter calibration is not needed, manual intervention errors are reduced, and the suspension conveying efficiency is improved.

The invention belongs to the technical field of laser manufacturing and green manufacturing, and discloses an ultrahigh-power laser low-loss repair method for deep defects of a thick plate, which comprises the following steps: identifying the positions, types and three-dimensional shapes of the surface and deep defects (pores and cracks) of the thick plate through a phased array ultrasonic detection module (PAUT); on the basis, a laser space energy distribution repairing path for specific defects is automatically planned; carrying out an ultra-high power laser defect remelting process; finally, whether the surface and the deep part of the thick plate have defects or not is recognized again through the ultrasonic detection module, low-damage repair of the deep part defects of the thick plate is achieved, and the use efficiency and the service life of a repaired part are improved.

The invention belongs to the technical field of visual identification, and particularly discloses a thick plate weld groove orthogonal section contour three-dimensional point cloud reconstruction method and system. Comprising the following steps: dividing a three-dimensional point cloud of a groove contour into a plurality of parts according to geometric characteristics of a weld groove; receiving designation of a target part, extracting a point cloud subset at the left junction of the target part, and further fitting to obtain an edge line; confirming a point closest to the three-dimensional point cloud of the current frame on the edge line; calculating a tangent vector of the edge line at the nearest point as a normal vector of an orthogonal section; calculating the distance between each point in the three-dimensional point cloud of the current frame and the normal vector of the orthogonal section, and screening out all points which do not exceed a preset threshold value; and calculating a projection point of each screened point on the orthogonal section to jointly form a reconstructed thick plate weld groove orthogonal section contour. According to the method, the coordinate system orthogonally perpendicular to the welding seam in real time is constructed, the three-dimensional point cloud is projected to the orthogonally perpendicular plane, the orthogonal section contour of the groove of the welding seam is obtained, and the measurement error caused by the pose of the sensor is eliminated.

The invention discloses a roll-to-roll cleaning control method and system for a flexible circuit board electronic structural member, and relates to the technical field of electronic manufacturing, and the method comprises the steps: carrying out the partitioning processing of a to-be-cleaned member, and obtaining a thin region and a thick region; the drying cavity is partitioned on the basis of the thin area and the thick area, and a partitioned temperature control method is constructed; a dehumidification drying module is placed, and a hot air drying method is obtained based on a chilled mirror dew-point instrument; the roll-to-roll cleaning control method is used for solving the problems that in an existing roll-to-roll cleaning control method for the flexible circuit board electronic structural part, differential temperature control is not carried out on a thick area and a thin area, and the influence of environment humidity in a drying cavity on the drying effect is not considered; the problems that a thin plate is overheated after being dried, water in a thick plate is not completely evaporated, watermarks which cannot be wiped appear on the surface of the electronic structural part, and then the practicability of the cleaned electronic structural part is affected are solved.

The invention discloses an automatic oil coating system and a working method thereof, relates to the technical field of automatic oil coating, and aims to solve the technical problem that the oil coating effect is affected by unstable clamping of workpieces with different thicknesses, and the automatic oil coating system comprises a cabinet body, a bearing plate, an oil coating mechanical arm, a drying box, an adaptive clamping structure, a pipeline communication assembly, an overturning assembly and a drying assembly. The bending rod is driven to act through gathering of the shell and translation of the push rod, so that the oiling clamping requirements of circular, rectangular and other plate-shaped workpieces are met, wrapping type stable clamping during oiling of a thin plate is achieved, multi-point type lifting clamping during oiling of a thick plate is achieved, and the problems that a traditional structure is single in adaptability, and stable supporting is difficult to guarantee the oiling stability are solved; and meanwhile, by means of the overturning transmission design, right-angle overturning and face overturning needed by oiling can be conducted on the thick plate and the thin plate correspondingly, double-face precise oiling is completed in cooperation with an oiling mechanical arm, the adaptability and efficiency are improved, and the requirement for automatic oiling of diversified plate-shaped workpieces is met.

The invention relates to the technical field of ship manufacturing welding, in particular to a large-wall-thickness Al-Mg alloy laser-MIG composite and friction stir welding coupled welding device and method for ships, and the device comprises a sequential system 1, a friction stir welding module 2 and a laser-MIG composite welding module 3; the laser-MIG composite welding module 3 comprises a laser sensing return device 3A, a welding gun swing control device 3B and a laser-MIG composite welding gun 3C; the laser-MIG composite welding gun 3C comprises an MIG welding gun and a laser welding gun, the MIG welding gun and the laser welding gun are coaxially arranged, an optical fiber laser is arranged in the laser-MIG composite welding gun 3C, the optical fiber laser has the functions of laser visual sensing, preheating and post-heating, and the device solves the contradiction between the penetration depth and the defect when a traditional welding method is adopted for the thick plate aluminum alloy for the ship. Axial force needed during friction stir welding can be reduced through laser preheating, the pressure of a main shaft of equipment is remarkably reduced, and the service life of a stirring head is prolonged.

The invention relates to the field of thick plate H steel welding, in particular to a back-gouging-free full penetration automatic welding method for thick plate H steel, and provides the following scheme aiming at the problems of large welding shrinkage and low welding efficiency during full penetration welding of H steel thick plates in the prior art: the method comprises the following steps: S1, forming single-side 35-degree grooves in two sides of an H steel web; s2, the welding position in the middle of the H-steel flange plate and the groove position of a web plate are polished; s3, according to different thicknesses of the H steel plates, the reversible deformation angle of the flange plate is adjusted; and S4, H steel is assembled, two times of positioned welding and fixing are conducted between the web and the two flange plates, and temporary supports are arranged. According to the method, the thick plate H steel is prefabricated in advance and subjected to reverse deformation, flange plate deformation and cross section size deviation are reduced, the operation without back gouging on the reverse side is achieved through the welding mode of low-current bottoming and submerged-arc welding secondary penetration, and the machining efficiency and the full penetration first-pass yield of the thick plate H steel are improved.

The invention provides a narrow gap swing laser welding pool wettability prediction method based on CFD simulation. The method comprises the following steps that an interaction platform is constructed through Python + PyQt5, and geometric modeling, UDF compiling and a material library module are integrated; the groove parameters and the swing track are dynamically loaded to a Fluent solver, and a full-coupling transient model of a steam recoil pressure-buoyancy-molten drop mass source item is established; in CFD-POST, the widest section of the molten pool is positioned on the basis of the contour surface with the volume fraction being 0.5, and Z-direction displacement-flow velocity data are extracted along the two side wall surfaces; fusing defects are predicted through double criteria of a bilateral average flow velocity difference threshold value and F test variance homogeneity; according to the method, dynamic quantitative evaluation of wetting behaviors can be achieved, the process development period is shortened, the defect detection rate is increased, and the method is suitable for aerospace thick plate welding quality control.

Provided is a roller device for transporting heavy objects, which has a lower overall height than conventional roller devices for transporting heavy objects and can keep the overall height low even when a top plate for placing heavy objects is provided. 【Solution means】 A roller device 10 for transporting heavy objects, which is used to carry and transport heavy objects, includes a thick plate-shaped main body frame 11 having a plurality of openings 11c, and a plurality of tires 12 provided across the openings. The overall height H1 from the floor surface is set to be 24 mm or more and 28 mm or less. When a top plate 13 is provided, the upper surface of the main body frame has a step dug down by 1.0 mm or more and 2.0 mm or less in a circular shape into which the top plate fits.

The invention discloses a thick plate titanium alloy narrow gap laser-MIG hybrid welding device which is characterized by comprising a hybrid welding head module, a magnetic field regulation and control module, a double-oscillation collaboration module and an integrated protection module. The composite welding head module comprises an MIG welding gun and a laser gun head; the magnetic field regulation and control module comprises a magnetic field generation device arranged on the outer side of the MIG welding gun in a sleeving mode and a magnetic conduction rod stretching into the narrow gap groove, and the end of the magnetic conduction rod is parallel to the horizontal direction and is centered with the front end of the welding wire. According to the narrow-gap laser-MIG hybrid welding device for the thick titanium alloy plate and the using method of the narrow-gap laser-MIG hybrid welding device, an alternating magnetic field is introduced, electric arcs swing periodically and achieve precise cooperation with laser beam oscillation scanning motion, and on the premise that the welding quality is guaranteed, the welding efficiency is greatly improved. Efficient and high-quality welding of the thick plate titanium alloy narrow-gap connector is achieved, and the method has the remarkable advantages of being high in efficiency, low in material consumption, low in defect rate and the like.

The in-situ measurement method for the depth and the width of the thick plate aluminum alloy perforation welding small hole molten pool is characterized by comprising the following steps: 1, image processing: preprocessing an obtained image, removing random splashing influence through combination of CLAHE and Gamma correction, improving the image quality, enhancing the edge characteristics of the molten pool and improving the welding quality detection accuracy; 2, deep learning: improving the accuracy and stability of small hole molten pool edge identification by improving the direction perception position code of SegFormer and introducing a time sequence information fusion mechanism; the method has the beneficial effects that in-situ real-time measurement of the depth and the width of the small-hole molten pool is realized through an image processing and deep learning fusion method according to the real-time detection requirement of key geometric feature changes of the small-hole molten pool in the variable polarity plasma arc welding perforation process of the thick plate aluminum alloy.

The invention relates to a special welding method for aluminum alloy. The special welding method comprises the steps that S1, preparation before welding is conducted; s2, MIG welding bottoming is carried out; s3, the groove is filled through TIG welding, and surface covering is conducted; and S4, post-welding treatment is carried out. The composite technology of MIG welding bottoming and TIG welding capping filling is adopted, the method is used for thick plate aluminum alloy welding, deformation is small, the porosity is low, preheating is not needed, and the requirement for welding of complex structures and dissimilar materials is met. The welding speed is increased by 3 times, and the porosity is reduced from 2.1% to 0.5%; and the flaw detection qualification rate is increased from 85% to 98%. The shrinkage amount is reduced by 60-80%; and the workload of the correction process is reduced by 50%. The method is suitable for the fields of aerospace, automobile manufacturing, rail transit and the like.

According to the high-strength and high-toughness titanium alloy flux-cored wire and the preparation method and additive manufacturing application thereof, the flux-cored wire with good comprehensive performance is obtained by optimizing alloy components and a flux core formula and improving a preparation process according to material characteristics, so that the fluidity of a welding pool is improved, the stability of a welding arc is improved, and a welding seam structure is controlled. Meanwhile, the high-strength and high-toughness titanium alloy flux-cored wire is applied to the field of additive manufacturing, high-quality titanium alloy part additive manufacturing is achieved, the strength, toughness and corrosion resistance of parts are improved, and the strict requirements of the high-end manufacturing industry for the titanium alloy material performance can be met. The process can be simplified, cold continuous rolling is combined with vacuum annealing, 1-4 procedures are reduced compared with a traditional process, and efficiency is improved by 30%; the additive manufactured metal is high in obdurability, the crack resistance is superior to that of a conventional welding wire, and the crack rate is reduced by 50%; the method is suitable for electric arc additive manufacturing, thick plate welding and dissimilar titanium alloy connection, and the application prospect is wide.

The invention belongs to the technical field of plate curved surface forming, and particularly relates to a thick plate space curved surface forming method based on a multi-point die, which comprises the steps of S1, reduction schedule design, S2, self-adaptive feeding positioning, S3, dynamic die shape adjustment, S4, gradient coarse reduction, S5, gradual fine reduction, S6, online springback monitoring and S7, closed-loop correction. The optimal reduction regulation is generated through joint calculation of finite element simulation and a springback prediction model, real-time visualization of springback three-dimensional distribution is achieved based on a 1kHz high-frequency sampling force-displacement coupling monitoring system, out-of-tolerance springback is automatically corrected through a reverse compensation algorithm, meanwhile, a multi-sensor cooperative monitoring system and a prediction model constructed based on the mechanics theory are used for monitoring the springback three-dimensional distribution, and the real-time visualization of the springback three-dimensional distribution is achieved. Rebound distribution pre-judgment under different curvatures is achieved, and the shape precision stability of batch production is ensured through a closed-loop correction system.

The utility model discloses a hoisting mounting rack for an angle iron clamping device. The hoisting mounting rack comprises a hoisting bottom plate, a spring pressing plate assembly, a locking hook assembly, an electric wrench assembly and a hoisting ring, the hoisting bottom plate is a pi-shaped thick plate and is provided with an opening, and the upper surface of the hoisting bottom plate is used for fixedly arranging the spring pressing plate assembly; the two locking hook assemblies are symmetrically located on the two sides of the spring pressing plate assembly. And the electric wrench assembly. And the four lifting rings are respectively arranged at four corners of the lifting bottom plate. The quick-mounting clamping device is clamped by the quick-mounting clamping device, the quick-mounting clamping device is lifted to angle iron of an iron tower where the quick-mounting clamping device needs to be mounted through lifting equipment, then quick mounting is achieved, climbing operation of personnel is not needed in the whole process, mounting is convenient and fast, and safety is high.

The invention belongs to the technical field of visual identification, and particularly discloses a thick plate saddle-shaped weld groove feature extraction and size measurement method and system. Comprising the steps that based on multi-scale geometric feature mutation detection, a current frame weld groove three-dimensional point cloud is segmented into a branch pipe face, a groove side wall, a backing weld surface and a main pipe face, and four area three-dimensional point clouds are obtained; according to the three-dimensional point cloud of each area, determining an intersection point of a branch pipe surface and a groove side wall, an intersection point of the groove side wall and a backing welding surface, an intersection point of the backing welding surface and a main pipe surface, an intersection point of the branch pipe surface and the main pipe surface, and a virtual intersection point of the groove side wall and an extension line of the main pipe surface as weld groove feature points; and constructing vectors between the feature points, and calculating the geometric dimension of the weld groove through vector operation. The method is based on multi-scale geometric feature mutation detection and adaptive point cloud segmentation, a fitting curve slope threshold value does not need to be preset, and the method can be adaptive to different included angles between the branch pipes and the main pipe in the pipe tubular joint.

The application discloses an asymmetric ring electrode cap, discards the traditional two-side uniform spherical electrode design, and adopts an asymmetric ring electrode structure, specifically, the welding end face diameter of a thin plate side electrode cap is 6-14 mm, the curvature radius is 40-100 mm, three rings are arranged, the inner ring is provided with a conical pit, and the middle ring is in the shape of an isosceles trapezoid; the welding end face diameter of a thick plate side electrode cap is not less than that of the thin plate side and not more than 14 mm, the curvature radius is not less than that of the thin plate side and not more than 100 mm, three rings are also arranged, the inner ring is provided with a conical pit, and the middle ring is in the shape of an equilateral triangle. The ring structure parameters of the two electrode caps are accurately designed to adapt to the welding requirements of plates with different thicknesses, and the welding quality and efficiency are improved. The application is particularly suitable for resistance spot welding of materials such as aluminum workpieces with large thickness ratios.

The invention discloses a laser cutting clamping device, and relates to the technical field of mechanical engineering, the laser cutting clamping device comprises a table plate, the top of the table plate is slidably provided with a laser support, the inner wall of the laser support is rotatably provided with a telescopic laser head, and the surface of the table plate is provided with a lifting turnover device; the turnover device comprises a U-shaped lifting rod, a first motor, a lead screw, a lantern ring, a second motor, a fixing frame, a slope protruding block, an L-shaped push rod, a round plate, a sliding clamping plate, a short round rod, a U-shaped push rod, a hollow round plate, a fixed clamping plate, a short telescopic rod, an L-shaped limiting rod and a sliding limiting rod, a square groove is formed in the surface of the table plate, and the U-shaped lifting rod is slidably installed on the inner wall of the square groove. The fixed clamping plate rotates to drive the plate to rotate, the U-shaped push rod is stressed to lift the plate when the plate rotates to 180 degrees, and the situation that the large-thickness plate falls off in the overturning process due to the fact that the large-thickness plate is too heavy is avoided.

The invention relates to the technical field of printed circuit manufacturing, and discloses a semiconductor test printed circuit board warping control method, which comprises the following steps of: firstly, establishing a symmetric stress substrate through inner layer residual copper rate control and symmetric lamination; then, the plate is placed in the middle layer during pressing, and a uniform heat transfer path is constructed through the teflon base plates arranged up and down; and finally, long-time cold pressing is performed after hot pressing to neutralize internal stress, through the synergistic process combination, warping control of the super-multilayer thick plate is converted from dependence on later physical correction into the technological process that high flatness can be achieved in an endogenous mode in the pressing and curing stage, and the technological process is simplified. Therefore, interlayer stress generated by accumulation due to material thermal expansion difference and uneven thermal field is inhibited, and a yield-controllable engineering path is provided for reliable manufacturing of high-density and high-thickness semiconductor test boards.

The invention discloses a control method and device for improving black marks on the surface of a thick plate in the technical field of controlled rolling and controlled cooling. The method comprises the steps that a pretreated plate blank is obtained; the pretreated plate blank is heated according to a preset heating system, and a heated plate blank is obtained; the heated plate blank is input into a descaling box to be descaled, and a plate blank subjected to primary descaling is obtained; the plate blank subjected to primary descaling is firstly input into a roughing mill to be subjected to cogging broadening and then input into a finishing mill to be subjected to thickness rolling treatment, and a semi-finished steel plate is obtained; and straightening and cooling the semi-finished steel plate to obtain a finished steel plate. The technical problem that in the prior art, due to existing controlled rolling and controlled cooling processes, black marks appear on the surface of the steel plate, and consequently the production cost is increased can be solved.

The application discloses a low-carbon-equivalent 355MPa grade normalized rolled thick plate organization uniformity control method, wherein the temperature of the billet before charging is less than or equal to 400 DEG C, the temperature of the soaking furnace is 1130-1150 DEG C, the time of the soaking section is 45-55 minutes, the total furnace time is 170-185 minutes, the second opening temperature of the billet is 880-940 DEG C, the finishing rolling is 6-8 passes, the cumulative reduction is 60-70%, and the final rolling temperature is 860-900 DEG C; the steel plate cooling is realized by adopting a laminar flow cooling system, the full-automatic water pouring control cooling mode is adopted, the water inlet temperature is 720-740 DEG C, the red temperature is 640-660 DEG C, and the surface temperature of the steel plate after cooling is monitored. The head and tail and the full-thickness organization type of the normalized rolled steel plate are all 'ferrite + pearlite' organizations, the grain size level is all above 9.0, there is no obvious banded structure and no bainite structure, and the problem of the organization difference of the 355MPa grade thick plate product caused by the normalized rolling is solved.

The invention relates to the technical field of welding, in particular to a welding manipulator convenient to adjust. The clamping assembly is used for clamping a welding piece; the driving assembly comprises a welding manipulator, and the welding manipulator is driven to move above the driving assembly; and the detection assembly comprises a second detection block arranged above the welding piece and a first detection block arranged below the welding piece. The thickness change of a welded plate is dynamically detected through the contact wheel, physical deformation is converted into an electric signal (voltage change), the magneto-rheological fluid coupling is linked to automatically adjust the welding speed, welding is accelerated in a thin plate area to avoid burnthrough, welding is accelerated in a thick plate area to ensure the fusion depth, self-adaptive regulation and control in the welding process are achieved, and the welding quality is improved. According to the mechanism, the uniformity and stability of weld joints are remarkably improved, and the defect problem caused by uneven thickness in traditional welding is effectively solved.

The invention discloses a forging and rolling combined method for preparing a large-specification super-long titanium alloy thick plate, which comprises the following steps of: S1, reversely deducing the size of a plate blank and the total amount of required raw materials according to the geometric size and working allowance of a target forged plate, designing the weight of a single cast ingot, mixing the raw materials and pressing into an electrode block, a titanium alloy cast ingot is smelted and prepared by adopting a three-time vacuum consumable electric arc smelting process; s2, after a high-temperature anti-oxidation coating is sprayed to the titanium alloy cast ingot, multi-heating-number forging is carried out, the multi-heating-number forging comprises high-temperature cogging forging, single-phase region forging and plate blank forming forging, and a rectangular plate blank is manufactured; s3, the plate blank is heated and subjected to two-phase region one-fire rolling, and a semi-finished thick plate is prepared; s4, after cracks and surface defects of the semi-finished thick plate are removed, the semi-finished thick plate is heated and subjected to two-phase region rolling, and a finished thick plate is manufactured; and S5, the super-long thick plate is sequentially subjected to annealing and surface treatment, and the finished plate is obtained. The method has the advantages that the traditional size limitation is broken through, the forming efficiency is improved, and the structure uniformity and the material performance of the large-specification forged plate are improved.

The invention relates to the technical field of welding, in particular to an ocean wind power single pile foundation super-thick plate welding method which comprises the steps that X-shaped groove plates are adopted for plate assembly, and the groove angle, the assembly gap and the truncated edge of each plate meet the assembly technical requirements; the plate is subjected to backing welding through a flux-cored wire, and the welding method is semi-automatic gas shielded welding; the plate is filled with solid submerged arc welding wires and subjected to cosmetic welding, and the welding method is double-wire submerged arc welding. Appropriate plates are selected for assembly so as to reduce gaps generated during assembly of the plates and meet technical requirements, deviation of backing welding is reduced through gas shielded welding, then double-wire submerged arc welding is used for filling and cosmetic welding, and meanwhile the problems that weld metal of the double-wire submerged arc welding is low in impact toughness and low in welding quality are solved by setting appropriate welding parameters. The problems that the welding efficiency of an original single wire is low, and the welding material waste is high are solved, and the production cost in the welding work is reduced.

This invention discloses a spot-and-ring laser filler wire welding method, comprising the following steps: cleaning the surface and bevel of the welding plate, and fixing the welding plate on a welding fixture; using a circular spot and an annular spot as a composite heat source for narrow-gap multi-layer filler wire welding of the welding plate; adjusting the defocusing amount, setting the diameter of the circular spot, and setting the diameter of the annular spot; setting the power of the circular spot and the power of the annular spot; setting the welding speed and the wire feeding speed; starting the welding system to perform welding, selecting the number of welding passes until the welding plate completes the butt welding. This invention uses a circular spot and an annular spot as a composite heat source for narrow-gap multi-layer filler wire welding. The circular spot is used to melt the filler wire to perform laser filler wire welding, and the annular spot is used to heat the sidewalls, preventing sidewall melting defects. This can avoid sidewall incomplete fusion defects during narrow-gap welding of thick plates.

The invention belongs to the technical field of intelligent welding, and discloses an adaptive control method for laser-arc hybrid welding process parameters of high-strength steel of a medium-thickness plate, which comprises the following steps of: measuring by using a line structured light camera through a gap measuring module to obtain the butt joint gap size of a steel structural member, and sending the measured data to a process parameter calculating module; the data communication module is used for processing and sending system data, collecting data of the sensing module and sending the data to the calculation module, and meanwhile collecting data of the calculation module and sending the data to the execution module. And a process parameter calculation module is used for processing the gap size and obtaining a process parameter target value, establishing a relationship according to data obtained by a BPNN model, realizing conversion from the gap size to the process parameter, and sending the data to a data bus. The welding execution module is used for physically achieving the welding process and comprises a laser, a welding gun and a mechanical arm fixedly connected with the welding gun.

The invention relates to a welding method for rolling an unequal-thickness plate into a pipe fitting, in particular to a method for high-frequency welding of the pipe fitting by an unequal-thickness aluminum-silicon coating plate, which comprises the following steps of: rolling areas needing to be welded on two sides of the unequal-thickness plate so as to reduce the difference value of the thicknesses on the two sides, rolling an opening angle and crushing an aluminum-silicon coating; rolling the unequal-thickness plate into a circular pipe; carrying out high-frequency welding on a longitudinal seam of the circular tube; and carrying out post-treatment on the round pipe. According to the method for high-frequency welding of the pipe fittings through the aluminum-silicon coating plates with the different thicknesses, the two side edges, used for welding, of the plates with the different thicknesses are rolled, so that the height difference of welding is reduced, the plates with the different thicknesses tend to be equal in thickness, then reliable welding is guaranteed, only the strength requirement of the pipes can be met, meanwhile, the welding cost is reduced, and the production efficiency is improved. In addition, the aluminum-silicon coating at the weld joint is eliminated through rolling, the microcosmic metallographic phase of the weld joint is qualified, the process can be simplified, meanwhile, the welding quality can be guaranteed, and the cost is reduced.