1286 results about "Welding deformation" patented technology

The invention relates to the technical field of welding deformation control, and discloses a multi-stage adjusting method and system for steel structure welding deformation control. The method comprises the steps that steel member parameters are measured, a welding deformation prediction model is established, and pre-deformation data are obtained; performing accurate pre-deformation processing according to the data; executing segmented welding and recording a temperature field and a deformation amount; performing local heat treatment on the high-stress area to obtain stress distribution; correcting a deformation area by using multi-point force; and performing precision detection and quality evaluation according to the corrected data to form a control file. According to the method, high-precision control over welding deformation of the complex steel structure is achieved through data transmission and feedback adjustment of all stages.

The invention discloses a multi-dimensional self-adaptive conductive connecting piece welding positioning system, and relates to the technical field of conductive connecting piece intelligent welding positioning, the system comprises a multi-dimensional data acquisition module, and a multi-modal sensor is used for acquiring contour, feature, current and other data; the data processing and analysis module processes data through deep learning and a physical model and predicts deformation; the self-adaptive positioning adjusting module controls the eight-axis linkage mechanical arm to compensate deformation through MPC; the welding process monitoring module fuses multi-source data monitoring and triggers adjustment when abnormity occurs; and the intelligent decision and feedback module realizes closed-loop control and optimization through knowledge graph and active learning decision feedback. Through multi-modal sensing and an intelligent algorithm, accurate positioning and dynamic compensation of welding deformation are achieved, welding parameters are adjusted in a self-adaptive mode, intelligent decision making and remote operation and maintenance are combined, the welding quality and stability are improved, errors and cost are reduced, and powerful support is provided for efficient welding production.

Disclosed in the present application are a dual-sided laser synchronous welding heat source model establishment method, a dual-sided laser synchronous welding heat source simulation method, a dual-sided laser synchronous welding system, and a medium. Firstly, combined heat sources each comprising a Gaussian cylindrical heat source attenuation model and a Gaussian surface heat source correction model are established, and a dual-sided laser synchronous welding heat source model is established by means of a rotating coordinate system; a three-dimensional geometric model and a three-dimensional mesh model of a T-joint are established; and the consistency between simulated molten metal morphology and an actual weld shape is used as a criterion for determining whether parameter settings of the dual-sided laser synchronous welding heat source model are rational, so as to obtain an optimal finite element simulation heat source model. By establishing two heat sources each obtained by combining a Gaussian cylindrical heat source attenuation model and a Gaussian surface heat source correction model, and symmetrically applying the two heat sources to two sides of a T-joint to act on the interior and surface of a weld, the present invention realizes the accurate simulation of a weld penetration zone in a T-shaped thin-plate weldment, and thus enables the prediction of residual stress and welding deformation during a design phase, thereby optimizing the welding process, improving the welding quality and efficiency, and reducing material waste and production costs.

The invention discloses a pre-welding deviation rectifying device for a submerged-arc welding straight seam steel pipe, and relates to the technical field of steel pipe submerged-arc welding. The submerged-arc welding device comprises a machining table, a first linear sliding rail module and a second linear sliding rail module are installed at the top of the machining table, a submerged-arc welding assembly is installed on the second linear sliding rail module, a fixed plate is fixedly installed at the left end of the top of the machining table, a movable plate is installed on the first linear sliding rail module, and three-jaw chucks are installed on the movable plate and the fixed plate correspondingly. A three-jaw chuck drives an inner correction rod to expand outwards to conduct center positioning on a steel pipe, an inner circle can be corrected, then a guide disc is rotated to enable a connecting rod to enter an arc groove part of an inner correction guide groove to lock the position of the inner correction rod, and a swing rod drives an outer correction rod to swing through a telescopic rod. The outer correcting rods correct the outer circle of the steel pipe, the two sets of outer correcting rods are pressed on the two sides of a welding seam to clamp the welding seam, and therefore welding deformation caused by thermal expansion and contraction in the welding process is reduced.

The invention belongs to the technical field of laser welding, and discloses a real-time stress monitoring laser welding clamp with a force sensor and a control system, and the real-time stress monitoring laser welding clamp comprises a transverse connecting rod, a supporting column, a servo motor, an adjusting supporting column, a stress rod, a force sensor protection shell and the force sensor; the force sensor is additionally arranged on the welding clamp, welding deformation in the welding process is effectively monitored, in turn, deformation data is obtained to optimize the process of a welding machine, searching of a welding process window can be greatly shortened, and welding quality and welding efficiency are guided and improved. In the welding experiment process, when data change of deformation force in the welding process is obtained, system analysis software analyzes the deformation force and deformation prediction in the welding process, the welding process optimization direction in the welding process is further analyzed, and the welding quality is improved. The process is optimized from the aspects of welding clamping force, laser power, welding speed, welding laser beam focus scanning path and the like.

The invention provides a multi-field regulation and control excitation welding device and system and a magnetic field control method. The welding device comprises a welding gun; the excitation magnetic poles are symmetrically arranged on the two sides of the welding gun. The at least one group of common magnetic poles are arranged on one side of the welding gun and are respectively connected with a pair of excitation magnetic poles; in a first power-on state, one of the pair of excitation magnetic poles and the common magnetic pole are communicated with first current at the same time; in a second power-on state, the other one of the pair of excitation magnetic poles and the common magnetic pole are communicated with second current at the same time; and when the welding gun is in a working state, the first current and the second current are alternately started to form double-path pulse current so as to generate a pulse composite magnetic field capable of acting on the electric arc, the molten pool and the molten drops. According to the welding device, molten pool flowing and molten drop transition can be regulated and controlled in the transverse direction, the longitudinal direction and the vertical direction correspondingly, electric arc energy distribution is optimized, the penetration depth and molten pool swinging are increased, the welding speed is increased, root penetration is enhanced, weld joint forming is improved, welding heat input is reduced, welding deformation is reduced, and the manufacturing cost is reduced.

The invention relates to the technical field of titanium alloy welding deformation control, in particular to a device and method for controlling titanium alloy welding deformation, and the method comprises the following specific steps: S1, preparation before welding: determining a reversible deformation device according to a welding seam form of a titanium alloy part, and carrying out assembly and spot welding; the assembled titanium alloy welding part is fixed to a reversible deformation device, and it is ensured that the part does not deform in the welding process; s2, a welding process; a thermocouple is placed on the surface of a weld joint, a local heating belt and heat preservation cotton are laid, and the heating belt, the thermocouple and local heating control equipment are connected for heat treatment; and S4, measurement of welding deformation is carried out. According to the method, a complete and easy-to-operate technological process is constructed by combining pre-welding anti-deformation tool fixing and post-welding local heating treatment technologies, and the problem of welding deformation with considerable numerical values and complex forms generated by multiple welding procedures of a large complex titanium alloy structure is solved.

The invention relates to the technical field of steel welding, in particular to assembly type building steel structure automatic welding equipment which comprises a bearing plate, mounting plates are symmetrically arranged on the bearing plate front and back, first sliding grooves are formed in the end faces of the mounting plates, and a limiting part used for limiting a box column bottom plate is arranged between the two mounting plates. According to the box column welding device, alignment and abutting work on a box column can be achieved before welding work, the cross-shaped plate moves downwards to drive the side plates to be close synchronously, it is guaranteed that steel plates are always in a mutual abutting state before welding work, when the welding part is used for welding a seam, the welding efficiency is improved, and the welding quality is improved. The position of the alignment section of the L-shaped bearing plate is adjusted through movement of the electric sliding block, the abutting force between the side plate and the welding point positions of the bottom plate and the partition plate in the welding process is improved, free deformation of a workpiece is limited, then welding deformation is reduced, and meanwhile the situation that when single abutting is conducted, other parts are subjected to external force, and consequently position deviation occurs is avoided.

The invention relates to shipbuilding flatness inspection equipment and a use method thereof, and belongs to the technical field of shipbuilding flatness inspection. The shipbuilding flatness inspection equipment comprises a magnetic adsorption type mobile robot platform, a high-precision vision module, an edge computing unit and a cloud data management platform; the magnetic adsorption type mobile robot platform is provided with a crawler-type walking mechanism and a self-adaptive vacuum adsorption unit. According to the invention, efficient and high-precision whole ship flatness intelligent detection can be realized through multi-sensor fusion and a self-adaptive robot platform, the system is suitable for real-time quality monitoring in ship body section construction, deck assembly and fitting-out stages, local fine scanning can be executed along a welding seam area in a ship body section detection scene, and the detection accuracy is improved. A welding deformation out-of-tolerance area is synchronously marked, a non-key plane area can be switched to a global rapid scanning mode, and in the deck assembly stage, a cloud platform can integrate data in real time and assist in carrying out an assembly dislocation correction scheme.

The invention discloses a welding deformation prediction system based on simulation analysis, and relates to the technical field of welding deformation prediction.The welding deformation prediction system comprises the steps that a micro-area unit grid is constructed by obtaining a geometric model of a to-be-welded structure, material heterogeneous distribution and welding path information; based on the grid and material characteristics, establishing a local nonlinear thermal-mechanical coupling simulation model; inputting heat source parameters, calculating an instantaneous temperature field, and constructing a stress evolution function in combination with path change; further deducing initial strain distribution, and generating a local deformation estimation map; error inversion is executed by comparing with historical experimental data, heat source and material parameters are corrected, and a simulation model is updated; and finally, outputting a welding deformation prediction map, and identifying a deformation sensitive region in the microstructure. The method has the high-precision prediction capability and the self-adaptive correction characteristic, and is suitable for deformation control and process optimization of the micro-scale welding structure.

The invention provides a curved surface segmented welding deformation prediction method and system, and relates to the field of data processing. According to the method, the welding heat input quantity is generated by obtaining the assembly error of a rib plate and a curved surface outer plate in a curved surface section, establishing the relation between the welding bead deposition area and the assembly error, constructing a welding heat input evaluation model and introducing a welding bead remelting coefficient. And determining a welding equivalent mechanical load based on the material thermodynamic parameters, inputting the welding equivalent mechanical load into the finite element model, and generating heated welding deformation prediction data. The gravity of the curved surface segments and the restraining force of the pressing block are converted into uniform volume force, and deformation precision analysis data are obtained; and constructing a contact unit model to analyze a contact state and a springback effect, and generating stress welding deformation prediction data. And finally, generating a welding deformation prediction result of the curved surface segment based on the data. By implementing the technical scheme provided by the invention, the prediction accuracy of the curved surface segmented welding deformation can be improved.

The invention provides a flexible welding deformation control method and an obtained bogie framework, specifically, a deformation monitoring sensor used for collecting workpiece deformation and a force sensor used for collecting clamping force are installed on a workpiece clamp; the deformation monitoring sensor and the force sensor are connected with the data acquisition control module; the method comprises the following steps: pre-installing a workpiece on a clamp, and establishing a mapping relation among the workpiece, the clamp and each sensor in the clamp; according to historical welding data of the same type of structure, presetting reversible deformation parameters, collecting pre-welding reference data, verifying data of each sensor, and if reversible deformation is effective, entering a welding process monitoring state; welding machine signals and sensor data are collected in real time, the deformation state is processed and analyzed in real time, and adjustment suggestions are output; and after welding is completed, the deformation trend of the workpiece after loosening and clamping is judged in combination with sensor data, deformation data of the workpiece after loosening and clamping are collected, whether the deformation data are qualified or not is judged, and if not, adjustment and repair are conducted till the deformation data are qualified.

The invention discloses an aluminum alloy wind power generation olive pipe welding clamp which comprises a base, and the base is provided with a clamping assembly which comprises a first arc-shaped plate assembly and a second arc-shaped plate assembly which are oppositely arranged and matched with the outer contour of an olive pipe. The inner side of the first arc-shaped plate assembly and the inner side of the second arc-shaped plate assembly are each provided with a plurality of self-adaptive adjusting mechanisms capable of conducting self-adaptive adjustment according to the change of the shape of the olive pipe, and a pressure / temperature / displacement three-parameter sensing system is integrated on each self-adaptive adjusting mechanism. The driving mechanism drives the first arc-shaped plate assembly and the second arc-shaped plate assembly to clamp or loosen the olive tube; and the controller is used for realizing real-time compensation of welding deformation based on a digital twin system and is in communication connection with the driving mechanism and the three-parameter sensing system. Thus, precise positioning and stable clamping of the olive pipe are achieved through the clamping assembly matched with the outer contour of the olive pipe, displacement and shaking of the olive pipe in the welding process are effectively avoided, and the welding precision and quality are improved.

The invention discloses a large titanium alloy part integral welding and inspection method and a clamp thereof, and aims to solve the problem of machining and detection of semi-closed titanium alloy box parts in the aviation field, the parts are divided into X, Y and Z three-section structures for segmented machining, and high-precision process reference points (a reference plane and a plurality of reference points) are arranged in rigid areas of all split bodies; and reference point location cloud data are formed through three-coordinate measurement and are fitted into an integral target point cloud. During welding, a datum point is used as a positioning datum, the relative positions of the split bodies are adjusted, after welding, post-welding point cloud is measured through three coordinates to be fitted with pre-welding data, and part deformation and deviation are quantitatively evaluated in combination with dense point collection and appearance scanning technologies. According to the method, the internal detection blind area of a semi-closed structure is broken through, accurate quantitative analysis of welding deformation is achieved through datum point positioning and multi-dimensional detection, the detection steps are simplified and rapid, the machining precision and detection efficiency of large titanium alloy welding parts are improved, and the method is suitable for the fields such as aviation with the strict precision requirement.

The invention discloses a titanium alloy large-size structural part assembling and welding method which comprises the steps that a bottom plate is placed on a welding platform, and the upper surface of the bottom plate faces upwards; the positions of the multiple rib plates are adjusted, the faces, with the inverted-V-shaped chamfers, of the width ends of the rib plates face downwards, and the multiple rib plates are sequentially inserted into the multiple V-shaped grooves; a plurality of arch-shaped clamps are used for fastening the rib plates on the bottom plate; and positioning and welding the inverted V-shaped chamfers of the plurality of rib plates with the plurality of V-shaped grooves respectively. According to the assembling and welding method for the titanium alloy large-size structural part, the assembling difficulty of the bottom plate assembly can be reduced, the assembling precision is further improved, in addition, the problem that laser welding is limited can be solved, and product welding deformation can be reduced.

The invention discloses a flange plate welding deformation compensation device, which relates to the technical field of welding, performs targeted constraint force adjustment on a local heat affected zone in a flange plate welding process by virtue of a synergistic effect of a partitioned flexible constraint assembly and an annular supporting and positioning assembly, and is different from a uniform constraint mode of a traditional integral rigid device. In the process, independent pressure control and air pressure adjustment are carried out through all the subarea air cavities, and in cooperation with real-time feedback of a temperature sensor and a laser displacement sensor, the constraining force of different areas can be dynamically changed, so that the restraining accuracy is improved. According to the method, stepped force control from initial pre-constraint to local reinforcement constraint to cooling and pressure maintaining is achieved, the mode can be matched with the local deformation trend generated by non-uniform heating of the flange plate in a more targeted mode, overall and local deformation of the flange plate in the welding process is effectively restrained, and compared with a traditional overall constraint mode, the method is more accurate.

The invention relates to the field of angle steel tower foot welding, and discloses an angle steel tower foot welding pressing plate clamp and a welding device.The angle steel tower foot welding pressing plate clamp comprises a base, sliding blocks symmetrically arranged on the base, clamping plates and limiting pieces arranged on the sliding blocks, a rotating rod arranged at the bottom of the base and limiting blocks symmetrically arranged on the rotating rod; the welding device comprises a mounting frame, a first turntable and a second turntable which are rotationally arranged on the mounting frame, a fixed plate movably arranged on the sliding plate, and a positioning rod arranged on the sliding plate; according to the angle steel tower foot welding pressing plate clamp, the pressing plate can be effectively fixed, welding seam deformation during pressing plate welding is prevented, the welding device can fix a steel plate workpiece to the position above the pressing plate, the fixing plate and the sliding plate are contracted and fixed in the four directions of the workpiece, and the fixing mode can be automatically adjusted according to the thickness of the workpiece steel plate; the steel plate workpiece is attached to the bottom pressing plate after being fixed, then the fixing plate can be pulled out, the connecting position can be welded conveniently, and meanwhile the welded tower foot finished product can be taken out of the mounting frame.

The invention discloses automatic welding equipment for metal workpiece machining, and relates to the technical field of welding, the automatic welding equipment comprises a base, two fixing seats and a welding machine, and further comprises a positioning mechanism; a pretreatment mechanism; the adjusting mechanism is used for driving the turntable to rotate; the interlayer welding auxiliary treatment mechanism comprises rapping assemblies mounted at the top and the bottom of the partition plate correspondingly and a polishing assembly mounted in the center of the top of the base; the positions of the upper thick pipe and the lower thick pipe are adjusted through the adjusting mechanism, an oxidation layer at the welding position is removed in cooperation with the interlayer welding auxiliary processing mechanism, meanwhile, reciprocating knocking is conducted on the welding position of the thick pipes, alternating stress generated by vibration can promote interlayer residual stress to be released, follow-up welding deformation is reduced, and welding quality is improved. By removing the oxide layer and releasing the residual stress in interlayer welding, the thick pipe splicing welding quality is effectively improved, and the thick pipe splicing welding efficiency is guaranteed while the thick pipe splicing welding quality is improved.

The present invention provides a method for predicting deformation of plate butt welds based on an inherent strain method. The method comprises: providing a group of plates of the same material with different thicknesses, establishing a welding deformation prediction model based on the plates; obtaining the plate thicknesses, and using the deformation prediction model to obtain the shrinkage of plates of different thicknesses, thereby establishing a curve relationship diagram of the shrinkage and plate thickness under unit inherent strain and regional width; and calculating the shrinkage angle of the plate butt welds based on the curve relationship diagram to determine the maximum deformation of the plate shrinkage. By calculating the shrinkage angle of the plate butt welds based on the curve relationship diagram to determine the maximum deformation of the plate shrinkage, the present invention enables technicians to approximately calculate and predict the maximum deformation of the plate shrinkage caused by welding deformation through the prediction method of the present invention, thereby quickly guiding work in the design and production stages.

The utility model discloses a welding tool anti-deformation side pulling device which comprises a moving mechanism and at least two oppositely-arranged working modules installed on the moving mechanism. The working module comprises a base, a side pulling structural part horizontally and slidably installed on the base and a telescopic air cylinder installed on a base block and connected with the side pulling structural part. The side pulling structural part is matched with a vertical face of the base in a spaced mode, a material placing position is formed by the side pulling structural part and the vertical face, and the telescopic air cylinder drives the side pulling structural part to horizontally move relative to the base. According to the side pulling device, the linear size of the frame can be kept, the assembly precision after welding is improved, the consistency and stability of products can be remarkably improved, and the reworking and adjusting cost caused by welding deformation is reduced.

The invention discloses a steel plate splicing and welding device based on steel structure precast beam machining, and belongs to the technical field of steel structure precast welding. The welding device comprises a welding base table, supporting inclined frames are symmetrically arranged at the two ends of the top of the welding base table, a transverse moving guide frame is arranged between the multiple sets of supporting inclined frames, a lifting type welding base is arranged at the top of the transverse moving guide frame, and the middle of the welding base table is sleeved with a gantry type welding regulation and control frame; high-precision positioning and clamping of the steel plates are achieved, welding deformation and deviation are effectively restrained, the welding efficiency is improved through linkage of the double mechanical arms, real-time collection of residues is facilitated through the design of the guide frame space and the residue collecting box, and the machining compatibility of the steel plates of multiple specifications is enhanced through the gantry type welding regulation and control frame; in addition, high-frequency data updating fusion is combined with a dynamic path planning algorithm and risk grade evaluation, a welding track is optimized, welding parameters are adjusted, weld defects are avoided, and the welding quality is guaranteed.

The invention discloses an air cylinder welding device for magnetic resonance equipment, and relates to the technical field of welding equipment.The air cylinder welding device for the magnetic resonance equipment comprises a feeding mechanism and a polishing mechanism, and a welding assembly and a dust removal assembly are arranged on the surface of the polishing mechanism; the feeding mechanism comprises a limiting supporting seat, a limiting round hole is formed in the surface of the limiting supporting seat, a movable supporting ring is rotationally connected to the inner wall of the limiting round hole, and a clamping assembly is arranged on the inner wall of the movable supporting ring. The welding quality can be improved, the segmented skip welding strategy is adopted, the length of a single-section welding seam is smaller than or equal to 5 mm, a heat affected zone in the welding process is effectively controlled, welding deformation is reduced, the welding quality and the overall strength of an air cylinder are improved, the automation degree is high, and the feeding mechanism, the polishing mechanism and the welding assembly are integrated; the automatic production process of the air cylinder from feeding, welding to polishing is achieved, manual intervention is reduced, and the production efficiency is improved.

The invention discloses liquid tank assembly welding equipment and a welding thermal compensation method, and relates to the technical field of liquid tank assembly welding, and the specific method comprises the following steps: obtaining a real-time linear expansion coefficient introducing temperature nonlinearity, calculating to obtain total welding deformation superposed by thermal expansion and phase change shrinkage through a calibrated phase change fraction and a phase change volume expansion coefficient, and obtaining the welding residual strain of the previous layer through the residual strain coefficient, correcting the actually measured welding strain in the strain data, obtaining the corrected actually measured strain of the current layer, and driving and adjusting the welding path of the next layer according to the total welding deformation when entering the welding of the next layer. The corrected actual measurement strain of the current layer is directly written into a system register and covers the actual measurement welding strain, through dynamic calibration of a linear expansion coefficient, welding gun path compensation is directly guided, actual measurement data of the current layer are corrected, and a complete chain of parameter correction, deformation calculation, path compensation and residual stress closed-loop control is formed; and finally, the effect of reducing the multi-layer welding thermal deformation error is achieved.

The invention discloses an auxiliary positioning device for mounting and welding a steel structure, relates to the technical field of steel structure welding, and aims to solve the problems of deviation and low accuracy during positioning of the device. According to the technical scheme, the device is characterized in that a laser ranging module is integrated on the outer side of a clamping mechanism and comprises at least four sets of laser emitters distributed in a spatial orthogonal mode, the four sets of laser emitters form a spatial positioning matrix, the deflection angle of a component is calculated through a triangulation method, and three-dimensional space coordinates of the component and a target installation point are collected in real time; and an industrial PLC and a welding deformation prediction algorithm module are arranged in the controller, and the controller is used for receiving the three-dimensional coordinate data of the laser ranging module. The controller generates the pre-compensation amount through the welding deformation prediction algorithm module, drives the hydraulic clamping jaw to adjust the pose through PID control according to laser ranging data, monitors the clamping pressure, the positioning precision and other parameters in real time, triggers an alarm and protection mechanism when the parameters are out of tolerance, and ensures the accuracy and safety of the welding process.

The invention relates to a welding manufacturing method for a steel tower shell of a steel shell concrete combined tower. The steel tower shell is composed of an inner wall plate, an outer wall plate, stiffening ribs, connecting angle steel and reinforcing steel bars. The wallboard units are welded by adopting different welding methods and deformation control methods; the steel tower shell block bodies are assembled by adopting a long-line method, the curve sections are made into profiling tires, and the steel tower shell section block bodies are assembled by adopting a horizontal assembling method; the sections of the steel tower shell are assembled through a three-dimensional assembling method, and the boundary dimensions of the sections are effectively controlled through a special inner mold jig frame and a supporting system. The sections of the steel tower are adjusted through the guide blocks and the temporary matching pieces, and the matching degree between the sections is improved; the assembling size, the line shape and the like are strictly controlled by comparing the assembling result with a computer simulation assembling result in the assembling process; according to the method, the welding deformation and the size precision of the wall plate units can be effectively controlled, the matching problem between blocks and sections of the steel tower shell can be effectively controlled, the technical problem in welding manufacturing of the steel tower shell can be solved, and the product size precision and the welding seam quality are improved.

The invention discloses a reactor internal CW plate assembly automatic welding system and a welding method thereof.The system comprises a bottom frame system, a rack, a welding mechanism, a welding head and a displacement mechanism, the welding position is adjusted through a bottom frame and the rack, the workpiece posture is adjusted through the displacement mechanism, and precise welding is achieved in cooperation with a double-wire welding gun and a laser locating system; the welding method comprises the steps of workpiece pre-deformation fixing, temporary accessory supporting, welding system three-dimensional calibration, ship type posture adjustment, double-wire symmetrical welding, real-time monitoring and the like. According to the method, through anti-deformation tool pre-bending design, double-wire pulse TIG welding and automatic motion control, welding deformation of the thin-wall component is effectively restrained, the quality consistency of welding seams is improved, the welding period of the welding seams is greatly shortened, the defect rate of the welding seams is reduced to 1.2%, and the requirement for high-precision manufacturing of nuclear-grade components is met.

The invention discloses a deformation control device for forklift portal frame structure welding, and relates to the technical field of welding deformation control, the deformation control device comprises a turnover machine, a turnover frame, a moving frame arranged on the turnover frame and a moving mechanism for driving the moving frame to move transversely, and the moving frame is provided with a monitoring module comprising a visual monitor and an infrared thermometer; a plurality of correcting assemblies are arranged at the top end of the overturning frame, each correcting assembly comprises a fixed frame, a sliding frame and an extrusion roller, and the movable frame is provided with an upper electric telescopic cylinder capable of driving a triangular inserting plate to extrude a round rod so as to drive the extrusion rollers to abut against the portal; the fixing frame is provided with a clamping assembly, a linkage plate is driven through a lower electric telescopic cylinder, and a bottom plate and a clamping plate are driven to rigidly fix the portal. The position of the fixing frame can be adjusted through bolts and the limiting grooves. The device can monitor welding deformation in real time and dynamically correct the welding deformation, is adaptive to portals of multiple specifications, improves the welding precision and efficiency, guarantees the quality of the portals, and reduces the labor dependence and the equipment cost.

According to the double-arc low-stress welding device and method for the high-strength steel structural part, two symmetrically-distributed welding mechanical arms are used for achieving symmetrical welding of welding seams on the two sides of the structural part, a vibration exciter vibrates along with welding in the welding process, and vibration aging is conducted after welding; the vibration pickup display screen can reflect vibration frequency, vibration time and vibration waves, and the ultrasonic stress detector monitors the welding stress state of the structural member in real time; double-arc symmetrical welding enables welding shrinkage to be generated uniformly, and welding deformation is reduced; welding stress and a molten pool can be regulated and controlled in real time along with vibration in the welding process, so that the welding molten pool is in a vibration state, slag inclusion and air hole escape is facilitated, and welding seam forming and organization are optimized; the ultrasonic stress detector monitors the welding stress state of the structural part in real time, quantitative control over the welding process of the structural part is achieved, and the stress state and welding deformation control consistency of the structural part is guaranteed. Welding deformation and welding residual stress can be effectively controlled, heat treatment after welding is not needed, and the component quality is improved.

The invention relates to the technical field of robot welding, in particular to an intelligent path planning system and optimization method for large structure robot welding, by collecting three-dimensional point cloud data of a workpiece and temperature field and stress field data in the welding process, a geometry-heat-force multi-field coupling model is established, and a machine learning algorithm is adopted for parameter correction; based on the model, a deep learning network is adopted to identify welding seam topological features and generate a path constraint parameter set; welding path nodes are optimized by using a hybrid optimization strategy of reinforcement learning and a multi-target genetic algorithm; monitoring the shape of a molten pool through a visual sensing system, and dynamically adjusting welding parameters in combination with a model predictive control algorithm; a distributed model predictive control algorithm is adopted to coordinate the motion trails of the multiple robots; and finally, constructing a welding process knowledge graph to realize continuous optimization of the system. The problems of inaccurate welding deformation prediction and poor path planning adaptability in the prior art are solved, and the welding quality and the production efficiency of the large structural part are remarkably improved.

The invention discloses a jig frame structure and method for movable deck welding deformation control. The jig frame structure is characterized in that a transverse supporting truss comprises a plurality of transverse T-shaped beams distributed at intervals; the longitudinal supporting truss comprises a plurality of longitudinal T-shaped beams which are distributed at intervals, each longitudinal T-shaped beam is perpendicular to the transverse T-shaped beams, and each longitudinal T-shaped beam is fixedly connected with the transverse T-shaped beams; two adjacent longitudinal T-beams and two adjacent longitudinal T-beams define a rectangular unit, a reinforcing plate is arranged in each rectangular unit, the reinforcing plates are parallel to the longitudinal T-beams or the transverse T-beams, and when the reinforcing plates are parallel to the longitudinal T-beams, the reinforcing plates are fixedly connected with the transverse T-beams; when the reinforcing plates are parallel to the transverse T-beams, the reinforcing plates are fixedly connected with the longitudinal T-beams. According to the jig frame structure, the internal stress of the movable deck can be effectively reduced, the camber of the transverse T-shaped beam and the longitudinal T-shaped beam is pre-increased in advance, a large amount of hot work correction work after completion is reduced, and the jig frame structure belongs to the technical field of ship accessory outfitting equipment manufacturing.