969 results about "Welding deformation" patented technology

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 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 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 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 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 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.

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 relates to the technical field of automobile part welding, in particular to an automobile part automatic calibration welding device which comprises a welding table, a welding arm, a mounting seat and a pipeline, the welding table is located on one side of the mounting seat, the welding arm is rotatably mounted on the welding table, and a fixing table is detachably mounted at the upper end of the mounting seat; a first fixing base is detachably installed on one side of the upper end of the fixing table, a fixing plate is rotatably installed on one side of the first fixing base, a swing motor is installed on one side of the fixing plate through a clamping mechanism, the output end of the swing motor is connected with a swing rod, and the swing rod penetrates through the fixing plate and then is inserted into one side of the interior of a pipeline. Through multi-angle adjustment, stress dynamic control, accurate clamping and dynamic adaptation, the problems of deformation and positioning in pipeline welding are effectively solved, angle deviation is corrected in real time, welding deformation is reduced, accurate positioning is ensured, the welding quality and reliability are fully improved, and faults after loading are avoided.

The invention discloses a semiconductor equipment framework laser precision welding deformation control method, which relates to the technical field of laser welding, and comprises the following steps: S1, identifying thermophysical parameters of materials on two sides of a welding seam, and executing differential preheating to enable heterogeneous materials to reach a preset initial temperature on a welding initial line; s2, welding is conducted based on the initial temperature, a molten pool and thermal stress distribution are monitored in real time, and a laser mode and energy input are dynamically adjusted; and S3, synchronously starting two-stage cooling according to a monitoring result. According to the laser precision welding deformation control method for the semiconductor equipment framework, a cooperative control system covering the whole welding process is constructed, welding deformation of the semiconductor equipment framework is effectively restrained through systematic regulation and control from the source to the terminal, personalized temperature control is implemented according to material differences in the preheating link, and the welding deformation of the semiconductor equipment framework is effectively restrained. Foundation deformation caused by different thermophysical properties is avoided, intelligent adaptation to complex welding seams is achieved, and thermal stress concentration is reduced.

The invention discloses a new energy automobile battery tray welding anti-deformation auxiliary supporting device, and relates to the technical field of new energy automobile battery trays, the new energy automobile battery tray welding anti-deformation auxiliary supporting device comprises a reference frame, L-shaped clamping seats, self-adaptive limiting mechanisms, elastic pressing mechanisms and supporting legs, the four L-shaped clamping seats are fixedly connected to the four corners of the top end of the frame, and the two self-adaptive limiting mechanisms are in front-back symmetry; the two elastic pressing mechanisms are in bilateral symmetry, the self-adaptive limiting mechanism comprises three telescopic columns, column bodies are fixedly connected with guide limiting plates, belleville spring sets are arranged between the plates and the frame, buffer rubber cakes are installed on the outer sides of the plates, and the two ends of the plates are connected with reinforced L-shaped brackets through magnetic assemblies. The supporting legs are inserted into four corners of the frame to be locked and fixed; according to the device, all-directional constraint is achieved through cooperation of multiple mechanisms, welding thermal stress is offset in a self-adaptive mode, deformation and scratch are prevented, and the welding precision is improved.

The invention belongs to the technical field of sheet welding deformation leveling, and discloses a construction method and a leveling method of a sheet leveling process parameter model, and the method comprises the following steps: M1, obtaining corresponding material attributes according to a sheet material needing to be leveled on site; m2, related data of the field welding process are known; m3, the initial leveling position, the heating time, the heating current and the heating frequency are obtained according to the material attributes and the welding process parameters of the thin plate; step M4, calculating the heat flux density of the Gaussian heat source model of the heating position according to the heating current, selecting the next heating position according to the heat flux density, and obtaining a heating sequence; and step M5, repeatedly executing the steps M3 to M4, and further correcting the heating time, the heating current and the heating frequency according to the actual temperature change data to obtain a final thin plate flattening process parameter model. According to the method, data of material attributes of an actual flattening heating workpiece and actual flattening working conditions are collected, and a multi-input and multi-output thin plate flattening process parameter model conforming to field working conditions is established.

The invention relates to the technical field of welding, and discloses a complex sheet metal frame cabinet tailor-welding method which comprises the following steps: S1, splitting: assembling an upper frame, a lower frame and a middle stand column according to a design structure of a frame cabinet; s2, bending is conducted, specifically, corners of the upper frame, the lower frame and the middle stand column are bent; s3, splicing is conducted, specifically, the upper frame, the lower frame and the middle stand columns are spliced into a frame, and the middle stand columns are clamped in the bent positions; and S4, welding is conducted, specifically, the spliced exposed parts of the upper frame, the lower frame and the middle stand column are welded. Through the four-step process of modular splitting, precise bending, mechanical interlocking and flat welding optimization, an innovative frame of mechanical positioning and then welding fixing is constructed, welding deformation is controlled from the source, the assembly consistency is improved, mechanical structure design and the welding process are deeply coupled, and the welding efficiency is improved. And a dual anti-deformation mechanism of physical interlocking constraint and welding heat input control is formed.

A method for optimizing process parameters of friction stir welding with synchronous rolling and a related device are provided. A heat source model is applied to a system finite element model, and heat transfer simulation is performed on the welding and cooling processes of friction stir welding. Furthermore, contact relationships and mechanical action relationships between a stirring tool finite element model and a weldment finite element model and between a roller finite element model and the weldment finite element model are applied in the system finite element model. Thermal-mechanical simulation is performed on the welding process, the cooling process and a clamp release process of friction stir welding with synchronous rolling with a temperature field result obtained from heat transfer simulation as an input. Based on the welding stress and welding deformation results obtained from thermal-mechanical simulation, process parameters are adjusted and re-simulated until optimal parameters are obtained.

The invention discloses a combustion chamber transition section welding fixture and welding method.The welding fixture comprises a first clamping mechanism, a second clamping mechanism and a welding mechanism, the first clamping mechanism is used for positioning and clamping a main body section and an inner connector so as to obtain a first middleware through welding; the second clamping mechanism is used for positioning and clamping the first middleware and the seat ring so as to obtain a second middleware through welding; the third clamping mechanism is used for positioning and clamping the second middleware, the outer connector and the supporting plate so as to weld the second middleware and the outer connector to obtain the combustion chamber transition section; wherein the second clamping mechanism adopts part of components of the first clamping mechanism to assist in positioning and clamping the first middleware; and the third clamping mechanism adopts partial components of the first clamping mechanism and the second clamping mechanism to position and clamp the second middleware. Accurate positioning of all components of the combustion chamber transition section is ensured, the problem of welding deformation is greatly solved, and the welding quality of parts is ensured.

The invention provides a composite connection method for thick titanium alloy plates, and belongs to the technical field of metal material welding and additive manufacturing. According to the technical scheme, the method comprises the steps that symmetrical X-shaped grooves are machined in thick plate titanium alloy workpieces to be connected; a laser-electric arc hybrid welding system is adopted for conducting double-face bottoming welding on the X-shaped groove, so that a double-face bottoming welding seam is formed; and a powder feeding type laser cladding system is adopted, and multi-layer and multi-channel additive filling is conducted in the X-shaped groove above the double-face bottoming welding seam. According to the method, efficient laser-electric arc composite bottoming and low-heat-input laser cladding additive filling are separated, high-quality penetration of the root is guaranteed firstly, then welding deformation and residual stress are remarkably reduced through low-heat-input filling, the microstructure of a filling area is optimized, and therefore a welded joint with excellent comprehensive performance is obtained.

The invention relates to the technical field of welding construction, and particularly discloses a low-temperature welding and deformation control method for segmented installation of a steel box arch bridge in a plateau complex environment, which comprises the following steps of: starting preheating and windproof preparation when judging that the plateau complex environment temperature is lower than a first preset temperature threshold value or the environment wind speed is higher than a first preset wind speed threshold value; starting a layered symmetric welding process of the steel box arch bridge by adopting carbon dioxide gas shielded welding until the front requirement of corresponding layered symmetric welding is met, calculating welding deformation based on the three-dimensional coordinates of each steel box arch bridge section acquired in real time, starting corresponding correction measures when the welding deformation exceeds a preset threshold value, and stopping welding when the welding deformation exceeds the preset threshold value. Until a plurality of prefabricated sections of the steel box arch bridge are obtained; starting an arch bridge closure stage for a plurality of prefabricated sections of the steel box arch bridge, and performing cooling and deformation control operation on the arch bridge closure section by using a slow cooling process; low-temperature welding and deformation control of segmented installation of the steel box arch bridge in the plateau complex environment are achieved.

The invention provides a vehicle body frame total splicing welding system and method for laser flight welding, and relates to the technical field of laser welding, and the vehicle body frame total splicing welding system comprises a total splicing clamp assembly, a mobile transmission assembly and a welding robot; the moving transmission assembly is used for moving the vehicle body frame to the general splicing clamp assembly; the general splicing clamp assembly comprises a clamp frame, a flexible clamping jaw, a monitoring feedback assembly and an adjusting module. The adjusting module is electrically connected with the flexible clamping jaw and the monitoring feedback assembly; the welding robot comprises a mechanical arm and a flying welding galvanometer; the flying welding galvanometer is installed at the free end of the mechanical arm. The monitoring feedback assembly integrated on the flexible clamping jaw monitors the clamping force of the flexible clamping jaw and obtains thermal deformation generated by the vehicle body frame and the clamp in the welding process, the adjusting module is adjusted to the optimal welding state in a self-adaptive mode and feeds back stress changes in the welding process so as to adapt to welding deformation of the space of the vehicle body frame, and therefore the adaptive clamping force is provided; the welding quality is improved.

The utility model discloses an electronic gun shell assembly tool which comprises a positioning column, limiting fences and a lower pressing block, an electronic gun shell is arranged on the positioning column in a sleeved mode, the lower pressing block is installed at the upper end of the positioning column for pressing and positioning, and the limiting fences are oppositely arranged on the periphery of the gun shell. A groove is formed in the limiting fence and used for positioning a ceramic ring and a lead-out ring of the gun shell, the inner side of the limiting fence is arranged to be in an arc shape corresponding to the outer circle of the ceramic ring, and the gun shell is sequentially provided with a first ceramic lining ring, a first lead-out ring, a first ceramic ring, a second lead-out ring, a second ceramic ring, a third lead-out ring and a second ceramic lining ring from bottom to top. By using the tool, all parts of the gun shell can be quickly assembled and positioned, and fixation is formed for subsequent welding to prevent welding deformation.

The utility model discloses a land leveler dozer blade structural member overlap welding tool which comprises a dozer blade assembly overlap welding tool used for positioning, clamping and fixing a dozer blade assembly and two side plates and a lug plate assembly positioning tool used for positioning a lug plate assembly on the dozer blade assembly. The lug plate assembly positioning tool is arranged on the dozer blade assembly overlap welding tool and comprises a fixing plate and lug plate opening gaskets, the lug plate opening gaskets are arranged on the two sides of the fixing plate and used for being inserted between two lug plates of a lug plate assembly, and the number of the lug plate opening gaskets can be adjusted. According to the overlap welding tool for the land leveler dozer blade structural part, the positioning size is pre-adjusted through the overlap welding size fine adjustment mechanism, overlap welding size pre-compensation can be achieved according to practical experience and welding deformation, it can be accurately guaranteed that the size after welding meets the drawing design requirement, it is avoided that due to poor size, the repair procedure is increased, and the product manufacturing cost is reduced; and the positioning accuracy of all parts of the dozer blade during lap welding is improved, and the labor intensity of operators is reduced.

The invention relates to the technical field of power distribution cabinet welding, in particular to a power distribution cabinet body welding device which comprises a base station used for conveying power distribution cabinet bodies in sequence, and the base station is provided with a welding device body fixed through a side arm and used for welding supporting pieces to the inner walls of the power distribution cabinet bodies. The welding device comprises a sliding platform fixed to the side arm. Through active cooling and physical supporting of the cooling plate and the circulating cooling system of the cooling plate on the outer wall of the cabinet body during welding, welding heat input is absorbed and guided out, welding deformation of the thin-wall cabinet body is restrained, and the appearance precision of the cabinet body, the mounting position accuracy of a supporting piece and the welding precision are guaranteed; by means of cooperation of the dust suppression air inlet groove and the suction pump, effective collection of welding fume is achieved, and the dual functions of dust removal, environmental protection and enhanced heat dissipation are synchronously achieved through filtering purification and directional air injection towards the liquid outlet pipe; and the production efficiency and the product consistency of the power distribution cabinet are improved.

The invention discloses a rolled plate welding process for a steel tower drum, and relates to the technical field of wind power tower drum rolled plate welding processes, and the process comprises the steps of steel plate pretreatment, intelligent plate rolling, gradient groove processing, segmented temperature control welding, pulse stress relief treatment and the like. The surface of a steel plate is cleaned by adopting a laser cleaning technology, the quality of the steel plate is ensured by combining eddy current detection and the like, the radian deviation of the intelligent rolled plate is corrected in real time through a plate rolling machine with an automatic aligning function and three-dimensional scanning, a composite structure of a 45-degree main groove and a 15-degree auxiliary groove is formed through gradient groove processing, and the size of a truncated edge is adaptively adjusted; the sectional temperature control welding adopts double-wire gas metal arc welding, temperature, current and voltage are controlled in a preheating section, a penetration section and a slow cooling section, residual stress is quickly released through pulse current in pulse stress relief treatment, and the process effectively solves the problems of large welding deformation, low welding efficiency, long stress relief treatment time and the like in large-scale tower drum manufacturing. And the welding quality and the production efficiency are both improved.

The invention discloses a welding device for inhibiting welding deformation of a box body of an electric appliance switch cabinet, and belongs to the technical field of welding, the welding device comprises a rack, rotation driving parts are arranged on the two sides of the rack, a welding platform is rotatably connected between the rotation driving parts on the two sides, and the welding device further comprises at least two flexible limiting mechanisms arranged on the two sides of the welding platform, the flexible limiting mechanism comprises a containing frame rotationally arranged at the top of the welding platform, supporting frames are arranged on the two sides of the top of the containing frame, a plurality of limiting rods capable of being flexibly adjusted are arranged on the supporting frames in the length direction in an array mode, and the to-be-welded component is limited through avoiding of the limiting rods. According to the non-rigid supporting device, by arranging the flexible limiting mechanism, flexible abutting connection of the outer walls of the plates in different shapes can be achieved, the limiting rod can be attached to the special-shaped face structure in a self-adaptive mode after limiting of the pressing block is relieved, non-rigid supporting of the thin-wall part is completed, it is guaranteed that welding positioning is stable, and stress concentration caused by rigid clamping is avoided.

The invention discloses an engine blade welding deformation control method based on pre-deformation and active cooling, and relates to the technical field of precision welding manufacturing, and the engine blade welding deformation control method comprises the following steps: collecting multi-source real-time monitoring data in a blade welding process, and inputting the data into a trained welding heat-force coupling dynamic model; performing nonlinear interaction analysis on real-time monitoring data through a built-in deformation semantic analysis unit in the welding heat-force coupling dynamic model, extracting core characteristic parameters, and creating a regulation and control decision system comprising a strain state space, a temperature control action space and a deformation compensation evaluation function by utilizing the strain state mapping set; the method is used for predicting a deformation response value corresponding to each regulation action. According to the method, through a regulation and control decision system comprising a strain state space, a temperature control action space and a deformation compensation evaluation function, deformation response is predicted, an optimal cooling path and a pre-compensation quantity regulation and control scheme are generated, and finally dynamic optimal control over blade welding deformation is achieved.

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