237results about How to "Improve forming quality" patented technology

The invention provides an electromagnetic-assisted nickel-based alloy laser melting deposition crack inhibition method and system, relates to the technical field of automatic control, constructs an intelligent control system, carries out deep fusion and real-time prediction on multi-source heterogeneous sensing data, generates a prediction result, sets a reward function and an action-value network, and improves the performance of the nickel-based alloy laser melting deposition crack inhibition system. Solving to obtain an optimization control strategy and analyzing and outputting the optimization control strategy; and constructing a three-dimensional electromagnetic field distribution matrix. In combination with real-time feedback of the shape of the molten pool, the molten pool is stimulated to flow directionally and oscillate non-linearly according to the resonance effect, oscillation parameters are obtained, thermodynamic behaviors corresponding to the molten pool are predicted according to the oscillation parameters, and a thermodynamic prediction result is fed back to the central control unit; the method comprises the following steps: detecting the surface appearance of a part, extracting defect characteristic parameter vectors, inverting defect influence factors, generating a dynamic regulation and control curve, dispersing the dynamic regulation and control curve into multi-dimensional control instruction vectors, updating a preset regulation and control model, outputting optimized regulation and control model parameters, and carrying out crack suppression operation again.

The invention provides a heat input regulation and control method and system for electric arc additive continuous forming, and relates to the technical field of additive manufacturing, and the method comprises the following steps: collecting process parameters in real time, inputting pretreatment process data into a self-adaptive heat input quantity calculation model, and constructing and calculating to obtain a real-time heat input quantity based on a thermodynamic principle and a heat transfer theory; starting the multispectral imaging equipment, performing real-time temperature field scanning, recording temperature field scanning data, extracting temperature gradient and cooling rate information, performing correlation calculation with real-time heat input quantity, and determining an influence relation evaluation result; generating a heat input sequence according to the influence relation evaluation result; and inputting the heat input sequence into a self-adaptive control system constructed based on a reinforcement learning algorithm, calculating an optimal parameter scheme according to a preset target sedimentary layer performance index and a current temperature field state, adjusting corresponding spatial-temporal distribution of control energy input according to the optimal parameter scheme, and performing control heat input on different positions and different layers of the sedimentary layer.

The invention provides a micropore machining method capable of adjusting a laser incidence angle in real time. The micropore machining method comprises the steps that S1, parameters such as the type of a micropore material, the micropore size and the depth-diameter ratio are determined according to the specific application environment and the use performance requirement; s2, according to the type and the characteristic parameters of the microporous material, a machining path drawing file is written, and a laser beam is controlled to conduct punching layer by layer according to the drawing file path in a spiral line mode; s3, when each layer is machined, laser scans in a spiral line mode according to a drawing and file path, and then trimming is conducted at the edge position in a concentric circle mode; s4, fitting a function relationship between the incident angle and the taper through an experiment, adjusting the incident angle of each layer of laser processing, determining layer-by-layer decreasing compensation of the compensation amount of the incident angle of each layer through the function, and eliminating the positive taper of the through hole; s5, circulation is conducted in this way, and machining of all layers is completed according to the mode; and S6, after machining of the last layer is finished, bottom-to-top and top-to-bottom reciprocating trimming is conducted in a concentric circle mode, and high-quality machining of the micropores is achieved.

The invention relates to the technical field of skin stretching, in particular to a digital twinning system and method of a skin stretching forming device, and the digital twinning system comprises a physical module, a data processing module and a twinning module, the data processing module comprises a real-time data module and a connection optimization module; the system integrates high-precision simulation, real-time data feedback and an intelligent optimization algorithm, realizes digital mapping and precise regulation and control of the whole forming process of the skin component, remarkably improves the forming precision and the surface quality, accelerates process iteration, and meets the high-standard requirements of aeronautical manufacturing.

The invention relates to multifunctional self-adaptive laser metal 3D printing equipment and a control method thereof.The device comprises a spray head bottom plate and a laser cladding spray head, the laser cladding spray head comprises a spray nozzle used for outputting powder and a pipeline connected to the spray nozzle and used for conveying the powder, and a first converging assembly is installed on the spray head bottom plate; the end, away from the nozzle, of the pipeline is arranged on the inner side of the first gathering assembly, the powder is magnetized when passing through the first gathering assembly in the pipeline, and a gathering processing assembly used for repelling the magnetic powder is arranged on the outer side of the nozzle. Through the design of the first gathering assembly and the gathering processing assembly, powder is magnetized through the first gathering assembly during conveying, then the magnetized powder and the gathering processing assembly generate like-pole repulsion acting force when the powder is sprayed out of the nozzle, the powder is promoted to be gathered together to form a powder beam, powder divergence and irregular arrangement are reduced, and the powder quality is improved. And the position precision and the forming quality and precision of powder conveyed to the molten pool are improved.

The invention belongs to the technical field of additive manufacturing, and particularly relates to an additive manufacturing method of an ultrahigh-strength steel-stainless steel interlayer heterogeneous structural part. Comprising the following steps that (1) a model is obtained, and an additive model is designed according to performance requirements needed by a structural part; (2) additive preparation is conducted, specifically, the type and specification of a base plate are selected, mechanical grinding and welding wire filling are conducted on the base plate, an additive path is planned according to the model, and a robot walking program is written; and (3) material adding is started, the optimal technological parameters are matched according to the planned material adding path, and material adding of the structural part is started and completed. The ultrahigh-strength steel-stainless steel heterostructure part obtained through the method has the excellent strength-toughness comprehensive mechanical property, the material adding efficiency is high, the interface of the ultrahigh-strength steel-stainless steel heterostructure part is free of the defects of holes, microcracks, unbonding and the like, and the surface quality is excellent.

The invention belongs to but not limited to the technical field of welding, and discloses a power modulation galvanometer laser welding method and device for a zirconium alloy fuel rod. A laser beam adopts a circular scanning track for welding along a circumferential weld, the power of 36 phase points in the circular scanning track is adjusted, a gradient power mode that the middle is high and the two sides are low is adopted for welding, a molten pool is stirred through the rotating laser beam, flowing of the molten pool is aggravated, gas escape is promoted, and meanwhile in the power modulation mode, the welding speed is increased. The surface energy distribution of the whole molten pool is more uniform, the power of the edge position of the molten pool is reduced, the weld seam undercut degree is reduced, and weld seam surface forming is more uniform. Three welding production procedures are reduced into two welding production procedures, meanwhile, the rotating speed during fuel rod welding is increased, the welding procedures are optimized, and the welding efficiency is improved; in addition, the problem that oxidation color beside an end plug welding circumferential weld is heavy is solved; and the welding seam air hole defect is improved, and the welding quality is improved.

The invention discloses a laser powder bed melting additive manufacturing buckling deformation intelligent monitoring and autonomous control system and method, the system comprises a powder platform, a powder laying mechanism, a first high-definition camera, a second high-definition camera and a user side remote monitoring module, the first high-definition camera is used for shooting block surface images; the second high-definition camera is used for shooting an image of the current powder layer; the user side remote monitoring module judges whether the surface warping degree of each formed block exceeds a preset range or not according to the received block surface image, and controls the printing working condition of the corresponding formed block according to the judgment result; and the user side remote monitoring module evaluates the powder laying quality of the current powder layer according to the received image of the current powder layer and determines the powder supply amount of the powder cylinder according to the evaluation result. Therefore, the influence of the warped block on the powder laying quality of the surrounding block can be automatically monitored, then the powder supply amount is adjusted in a self-adaptive mode, and the influence of the warped block on the forming quality of the surrounding block is reduced.

The invention discloses a ceramic / high-entropy alloy composite particle reinforced aluminum-based composite material and a laser additive manufacturing method thereof. Firstly, ceramic / high-entropy alloy composite powder and aluminum alloy powder are mixed through ball milling to obtain ceramic / high-entropy alloy composite particle reinforced aluminum alloy composite powder, then the composite powder of the three components is laid on a powder bed, laser power, scanning speed, scanning spacing and the like are adjusted, and laser scanning melting solidification is conducted to prepare the ceramic / high-entropy alloy composite particle reinforced aluminum alloy composite powder. And the ceramic / high-entropy alloy composite particle reinforced aluminum-based composite material is formed. The composite material disclosed by the invention is highly compact, so that the ceramic / high-entropy alloy composite particles can effectively improve the mechanical property of the aluminum-based composite material, and can be used for manufacturing high-performance complex parts for aerospace, automobile rail transit and the like.

The invention relates to the technical field of metal 3D printing and discloses a self-adaptive wind field air suction structure and a 3D printing method in order to solve the technical problem that in the metal 3D printing process, the air suction efficiency is reduced due to the fact that splashing, smoke dust and metal powder are accumulated at an air suction opening, and accordingly the 3D printing efficiency and the forming quality are affected. The air suction device is provided with an air suction shell, the air suction shell is defined by a top plate, a bottom plate and a back plate, a plurality of obliquely-arranged spoilers are arranged in the air suction shell in an array mode, sub air inlets are formed between the spoilers, and rotating joints axially connected with the top plate are arranged at the upper ends and the lower ends of the spoilers. A driving motor used for controlling the deflection angle of the spoiler is installed on the top plate, a self-suction fan located between the front baffle and the rear baffle and the back plate is further arranged, and a fan motor used for driving the self-suction fan is installed on the top plate. The problem that according to traditional 3D printing equipment, the air suction efficiency is reduced due to the fact that smoke dust, splashes and metal powder are accumulated at an air suction opening is solved.

The invention belongs to the technical field of material science, and discloses a shape optimization method for a high-temperature alloy disc type pre-forged piece. According to the method, finite element numerical simulation, a support vector machine and a genetic algorithm are combined, a GA-SVR prediction model between an input variable and a target function is established, the optimal value of the target function is predicted, and the optimal geometric parameter combination of the pre-forged piece is obtained. Firstly, the shape of a pre-forged piece is preliminarily designed through experience, then a finite element simulation result is extracted to establish a data set, parameters of a support vector machine model serve as a target function of a genetic algorithm by means of the data set, the parameters of the support vector machine model are optimized by means of the genetic algorithm, and an optimal prediction model is obtained. And for the size parameter combination of the pre-forged piece when the best deformation uniformity evaluation index is obtained, the deformation uniformity of finish forging is effectively improved through global optimization of the genetic algorithm, so that the final performance of the forged piece is improved.

The invention discloses a springback compensation control method based on differential-thickness tailor-welded blank incremental forming, and belongs to the technical field of plate incremental forming. The method specifically comprises the steps that an incremental forming three-dimensional mathematical model of the differential-thickness tailor-welded blank conical part is constructed; based on the three-dimensional mathematical model, the obtained springback curve of the different-thickness tailor-welded blank conical part is compared with the theoretical contour line to obtain the springback difference value of the thick side and the thin side of the different-thickness tailor-welded blank conical part; further, the feeding amount of the side, with the large springback amount, of the different-thickness tailor-welded blank conical part is obtained; the method comprises the following steps: segmenting and dividing a different-thickness tailor-welded blank conical part on the basis of the forming depth of the different-thickness tailor-welded blank conical part, respectively applying corresponding feed amounts to the thick side and the thin side of each segment of the divided different-thickness tailor-welded blank conical part for processing, and after the thick side of each segment of the different-thickness tailor-welded blank conical part is processed, carrying out last-step reverse compensation processing on the thin side. And machining of each section of the different-thickness tailor-welded blank conical part is completed, and machining is conducted circularly in the machining mode till machining of the different-thickness tailor-welded blank conical part is completed. The forming precision and quality of the machined part are effectively improved.

The invention provides an electric arc additive manufacturing high-corrosion-resistance magnesium alloy component and a preparation method and application thereof.The preparation method of the electric arc additive manufacturing high-corrosion-resistance magnesium alloy component comprises the following steps that a magnesium alloy base plate is fixed to a workbench provided with a heating plate, and the heating plate is provided with a thermocouple; the thermocouple is connected with the temperature control box to control the temperature of the heating plate so as to realize constant-temperature heating of the magnesium alloy substrate; and the magnesium alloy wire is fixed to wire feeding equipment, single-channel layer-by-layer reciprocating deposition is carried out along the set track according to the set welding machine technological parameters till the target height is reached, and the high-corrosion-resistance magnesium alloy component is obtained. According to the method, the temperature of the magnesium alloy substrate and the interlayer temperature are controlled at a constant temperature through the external temperature field, the manufacturing process parameters are adjusted, the interlayer binding force and the forming quality of the magnesium alloy component are improved, and the prepared high-corrosion-resistance magnesium alloy is small in grain size and uniform in precipitated phase distribution and shows excellent corrosion resistance compared with a traditional cast magnesium alloy.

The intelligent flexible clamping system for creep age forming of the large thin-walled workpiece comprises a base, a base table is arranged at the upper end of the base, and extending holes are distributed in the base table in a matrix mode; the lifting driving mechanism is mounted on the base, and the upper end is provided with a lifting movable end aligned with the extending hole; the flexible clamping assembly comprises a base frame, a rotating table, a first rotating driving mechanism, a pitching table, a second rotating driving mechanism and a supporting module. The rotating table is rotatably and movably installed on the base frame along the vertical axis, the first rotating driving mechanism is installed on the base frame and connected with the rotating table so as to drive the rotating table to rotate and move along the vertical axis relative to the base frame, the pitching table is rotatably and movably installed on the rotating table along the horizontal axis, and the second rotating driving mechanism is installed on the rotating table and connected with the pitching table; the supporting module is detachably installed at the upper end of the pitching table. According to the method, the flexibility, the accuracy and the efficiency of creep age forming of the large thin-wall part are remarkably improved. And the requirements of multiple varieties, small batch and customization can be met.

The invention provides a magnesium alloy electric arc additive component and a manufacturing method and application thereof, and belongs to the technical field of electric arc additive manufacturing. The manufacturing method of the magnesium alloy electric arc additive component comprises the following steps that a magnesium alloy base plate is fixed to a printing table, a magnesium alloy wire is conveyed to the position below a welding gun, single-channel layer-by-layer reciprocating welding is carried out, after welding of each layer is completed, an oxidation film on the surface of a printed piece is cleaned, and after the interlayer temperature reaches 80-100 DEG C, welding of the next layer is carried out; and the steps are repeated to the target height, and the magnesium alloy electric arc additive component is obtained. According to the manufacturing method of the magnesium alloy electric arc additive component, control over internal defects of the magnesium alloy and good interlayer combination can be achieved, the obtained magnesium alloy electric arc additive component is small in mechanical property anisotropy, and the strength and plasticity are remarkably improved.

The invention discloses an in-situ control device and method for inhibiting metal additive manufacturing cracking, and belongs to the technical field of metal additive manufacturing. According to the device, the two propelling structures are arranged on the two sides of the core base plate with the transverse gap, the two propelling structures make contact with the core base plate from the two sides of the core base plate correspondingly, so that in the additive manufacturing process, the two propelling structures assist in extruding shrinkage of the core base plate from the two sides of the core base plate; and it is ensured that the shrinkage speed of the core substrate can be matched with the shrinkage speed required by the formed part. The device disclosed by the invention is a device for regulating and controlling the local structure deformation of the substrate in situ, and the local deformation of the substrate is regulated and controlled in real time in the additive manufacturing process, so that the distribution and evolution of a stress field are regulated, the tensile stress is successfully converted into the pressure stress, and the generation and expansion of cracks are effectively inhibited.

The invention relates to the field of extrusion forming of piston skirts, in particular to an extrusion forming process of a large-size piston skirt of a marine diesel engine, which comprises the following steps of: placing a piston skirt raw material in a pre-forging annular die and a pre-forging lower die, pressing and moving downwards through a pre-forging convex die, forming a piston skirt pre-forging piece, taking out the pre-forging convex die, and replacing the pre-forging convex die with a finish-forging convex die; according to the method, the extrusion deformation process of the piston skirt is optimized, the internal metal deformation is smoother, the structure is more uniform, the metal flowing state of an area A with the most concentrated stress in the using process of the piston skirt is particularly improved, and the piston skirt forging is formed through downward pressing and movement of the finish-forging male die. And the overall quality is improved.

According to the sectional material group stretch-bending forming die and method based on the stretching arm type stretch-bending machine tool, through the combination mode of different parts and the combination of basic technical parameters of stretch-bending machine tool machining, the overall stretch-bending forming die is designed and constructed, and the technological method for multi-project sectional material group stretch-bending forming is achieved for the first time. The forming limitation different from traditional single part forming is adopted, the machine tool forming limit is utilized, parts which cannot be formed through a stretch-bending machine are combined to form a long blank, and the stretch-bending forming technology is achieved. According to the method, the reasonable stretch-bending forming die and the reasonable technological blank length are designed, parts such as bending parts, Yao machine forming parts and manual forming parts which cannot be subjected to stretch-bending forming can be formed in a stretch-bending forming mode, the internal pressure stress of the parts is converted into the tensile stress, the mobility of materials in the part forming process is balanced, and the forming quality of the parts is improved. And part forming springback is effectively reduced.

The invention discloses a pipe fitting free bending forming device for integrated variable shaft machining. The basic moving module is used for providing translation freedom degrees of the bending die in the X direction and the Y direction, and the precision adjusting module comprises two state switching modules and two auxiliary adjusting modules. The bending die can be switched among a follow-up state, a semi-active state and an active state by changing the position of a rotating motor in the state switching module and the position of a driven shaft in the auxiliary adjusting module, the number of machining shafts of the device is adjusted, and the fixed guiding module is located on the rear side of the bending machining module. The fixed guide module is always kept static in the machining process, and the arc face of the front end of the guide mechanism makes contact with a guide tail wing of the bending machining module so as to control the machining posture of the bending die in the follow-up and semi-active state. The machining quality and the machining efficiency of the bent pipe are improved, and meanwhile the application range of the whole device can be widened.

The invention discloses a variable-airflow-protection gas nozzle device and a method for repairing a turbine blade through wire precise laser welding by using the variable-airflow-protection gas nozzle device, and belongs to the technical field of laser welding repairing of aero-engines and gas turbine blades. The problems that in an existing turbine blade laser welding repairing process, protection cannot be achieved at the same time, operation is easy, the welding process is monitored, oxidation of molten metal, pollution of metal steam and molten drop splashing are restrained, and irregular multi-profile laser welding quality protection cannot be achieved are solved. The device is composed of two arc-shaped columnar shells, a protective airflow net and a sealing cover, a first cavity, a second cavity and a third cavity are formed, and a plurality of gas outlets are formed in the protective airflow net; the method comprises the following steps: 1, clamping and setting; 2, symmetrically fixing the two sides of the blade clamp; and thirdly, wire precise laser welding repair is conducted under a protective gas hood. The invention relates to a gas nozzle device for variable gas flow protection and a method for repairing a turbine blade by using the gas nozzle device for wire precision laser welding.

The invention provides a roll bending combined die for a carrier rocket special-shaped frame with multiple sections and a using method, the roll bending combined die comprises a middle front roller, a middle rear roller, a side roller, a side pressing wheel and a plurality of roller cushion blocks, the middle front roller is installed on the front side of the middle of the special-shaped frame, and the middle rear roller is installed below the rear side of the middle of the special-shaped frame. Side rollers and side pressing wheels are installed on the two sides of the special-shaped frame respectively, and roller cushion blocks are installed below the middle front roller and the middle rear roller. The method has the beneficial effects that a split combined die structure is adopted for roll bending forming of the profile frame, the number of dies is reduced, the production cost is reduced, and workers can conveniently transport and install the profile frame; the split combined die structure can select whether a cover plate needs to be installed or not according to profile characteristics, friction of a thin area at the top end of a part is reduced, and part forming quality is improved.

The invention relates to an upper ejection reset mechanism for a die holder of hot die forging equipment, and belongs to the technical field of hot die forging equipment. The upper material ejection reset mechanism comprises an equipment body, a hot mold tool and a mold, the equipment body comprises an equipment base and an equipment top seat, the hot mold tool comprises an upper mold body and a lower mold body which are arranged between the equipment base and the equipment top seat, and the mold is fixed between the upper mold body and the lower mold body. The upper die body is provided with an ejection reset mechanism, the ejection reset mechanism comprises a first ejection rod, a first elastic piece for driving the first ejection rod to reset, a second ejection rod and a second elastic piece for driving the second ejection rod to reset, and the first ejection rod and the second ejection rod are matched in an abutting mode; the first ejector rod corresponds to a hydraulic drive of the equipment body, and the second ejector rod corresponds to a forge piece. Through the arrangement of the upper ejection reset mechanism, the probability that the forge piece is defective by the upper ejection mechanism is reduced.

The invention discloses an ultrathin glass forming device which comprises a runner, baffles and a vertical plate, a feeding bowl is arranged in the runner, a feeding pipe is arranged at the bottom end of the feeding bowl, a forming plate is fixedly connected between the two baffles, one end of each baffle is fixedly connected with a connecting plate, a penetrating opening is formed in the lower portion of the vertical plate, and an arc groove is formed in the vertical plate. According to the device, by means of the gravity of molten glass feeding flow, the molten glass feeding flow is automatically flattened on the top face of the forming plate, temperature regulation and control are conducted on the forming plate and a flattening area glass belt on the forming plate through the platinum electrode and the platinum piece, the temperature of the forming plate is adjusted, the temperature of the forming plate is adjusted, and the temperature of the forming plate is adjusted. According to the device, the forming plate is arranged, so that the spreading speed of the glass tape in the flattening area and the thickness uniformity of the glass tape in the flattening area are improved, the dip angle of the forming plate can be quickly and conveniently adjusted by pushing the connecting plate upwards, the glass tape in the flattening area forms an overflow effect at the top of the corrugated groove due to the arrangement of the corrugated groove, and the forming quality of molten glass is further improved.

The invention discloses a method for improving laser directional energy deposition forming quality of heterogeneous materials, and belongs to the field of multi-material additive manufacturing. According to the method, material components and proportions are dynamically adjusted, trace nano-particles are added to serve as a reinforcing phase to be evenly mixed with the material components to serve as raw materials of the deposition component, and the service performance needed by different parts of the deposition component is achieved based on a directional energy deposition process. Besides, a reasonable path planning form is provided according to different materials and different structures, thermal circulation in the directional energy deposition process is regulated and controlled, residual stress and deformation of the component are reduced, distribution of the component is more uniform, and therefore the forming quality of the deposited component is improved; on the basis of the method, on the premise that high forming quality is guaranteed, continuous controllability of'material component-inherent property-use performance 'in a three-dimensional space is achieved for the deposited component.

The present invention provides a progressive die for forming a multi-sub-sheet of an integral corrugated sheet, comprising an upper die assembly and a lower die assembly, wherein the upper die assembly comprises an upper die base, a discharge plate and a punch fixing plate fixedly connected to the lower end surface of the upper die base, and the lower die assembly comprises a lower die base, a die pad and a die fixing plate fixedly connected to the top of the die pad; a plurality of workstations are correspondingly arranged between the punch fixing plate and the die fixing plate, which are respectively from left to right in processing order: a first punching station, a first blanking station, a second blanking station, a first forming station, a second forming station, a second punching station and a third blanking station, thereby streamlining the mold and reducing the processing cost, and achieving the goal of large-scale continuous stamping of integral corrugated sheets with a single set of molds.

The application belongs to the technical field of additive manufacturing equipment, and relates to a non-contact powder spreading device for additive manufacturing, which comprises a powder storage groove, a powder controller and a control panel; the powder controller is arranged at the bottom of the powder storage groove; and the control panel is connected with the powder controller and drives the powder controller to open or close. The application can avoid the problems of knife sticking and powder sticking, and can also avoid the problems of deformation and damage of the formed part caused by scraping. The application can effectively improve the forming quality of the powder spreading type additive manufacturing equipment and is also beneficial to the realization of the non-support forming technology.

The invention discloses a CMT electric arc welding method for defect repair welding of a ZL114A aluminum alloy casting, and belongs to the technical field of defect repair of aluminum alloy castings. The method aims at solving the problems that an existing repair welding method for the ZL114A cast aluminum alloy is high in heat input, large in deformation and low in repair efficiency. The method comprises the following steps: firstly, aiming at defects of different sizes, machining the defects into regular spherical-crown-shaped grooves of different sizes by utilizing a cold machining method; an electric steel wire brush is used for polishing the inner wall of the groove and base metal around the groove, and surface stains and oxide skin are removed; the casting is placed on a welding workbench; robot CMT welding equipment is adopted for repair welding; and writing a welding gun repairing path on the robot demonstrator. And repair welding is carried out according to the following principles: repair welding is carried out by utilizing an Al-Si welding characteristic curve, a repair welding piece is preheated to 250-350 DEG C, shielding gas is started, and automatic repair is started according to the planned path, the wire feeding speed and the welding speed. By means of the method, high-quality repair welding seams without pores and cracks can be obtained.

The application discloses a V-shaped groove weld deviation detection method based on a YOLO model and groove reconstruction in the field of welding. First, a single YOLO model is trained to synchronously identify and intercept the left and right edge windows of a groove and the center window of a welding torch in a globally collected image of a welding area. Second, the groove edge window image is subjected to a gray scale transformation and a local adaptive threshold method, and the left and right edges of the groove are reconstructed in combination with a random sample consensus algorithm and a multi-level rollback mechanism. Then, the center of the groove is located by a midpoint recursion method based on the reconstructed groove edge, and the center of the welding torch is determined according to the center window of the welding torch. Finally, the deviation between the center of the groove and the center of the welding torch is calculated, and a two-level filtering mechanism combining Kalman filtering and moving average filtering is adopted to obtain a stable weld deviation value. The synchronous positioning of the double groove edges is realized by a single model, the arc light interference is effectively inhibited by combining the local adaptive threshold and the reconstruction method, and the robustness and precision of the weld deviation detection are improved.

The present application relates to the technical field of heavy-duty gas turbine, and particularly relates to a heavy-duty gas turbine high-temperature alloy welding defect intelligent identification and repair method. By acquiring a welding area infrared thermal image sequence to identify an abnormal temperature drop area as a candidate defect area, then performing defect verification and type determination through ultrasonic phased array scanning, calculating a repair heat input curve according to the defect type, executing pulse modulation cladding repair and adjusting parameters according to real-time temperature field and acoustic emission signals, automatic identification and accurate repair of welding defects can be realized, and the repair quality and efficiency are improved.