552 results about "Welding deformation" patented technology

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 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 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 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 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 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 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.

The invention discloses an intelligent prediction method for welding deformation of a steel bridge deck based on physical-virtual double-domain collaboration and CNN-LSTM fusion modeling, relates to the technical field of welding process optimization and intelligent manufacturing, and aims to solve the problem that traditional welding deformation control mainly depends on empirical formula derivation and finite element thermoelastic-plastic analysis. However, the former is difficult to accurately reflect a nonlinear relation of a complex welding condition, and the latter has the problems of high computing resource consumption, low modeling efficiency and the like, and particularly, the prediction precision and the real-time performance are difficult to meet intelligent manufacturing requirements in the face of a multi-welding-seam coupling effect and a large-scale structure. The invention provides an intelligent prediction method for welding deformation of a steel bridge deck based on physical-virtual double-domain cooperation and CNN-LSTM fusion modeling, and the method comprises the steps: deeply fusing the dynamic mapping capability of the physical-virtual double-domain cooperation and the spatial-temporal feature modeling advantages of a CNN-LSTM fusion model, and synchronously integrating an NSGA-II algorithm to construct a process optimization closed-loop system; and high-precision prediction and process dynamic optimization of the welding deformation of the steel bridge deck are realized.

The present application relates to the technical field of liquid rocket engine nozzle, and discloses a manufacturing method of an extension section of a large-scale liquid rocket second-stage engine nozzle, which is characterized in that the extension section is divided into n cylinder sections according to the size of the plate and the elongation rate of the plate, and each cylinder section is divided into m melon pieces to be prepared by means of tailor welding; the number n of the cylinder sections ensures that the number of the girth welds of the extension section is the least, and the welding of the girth welds is maximally avoided; the cylinder sections of the extension section are obtained by stress relaxation heat correction treatment of preformed cylinder sections, and the uncontrollable welding deformation problem is overcome. The present application solves the problem that the uncontrollable deformation caused by the springback of the sheet metal forming in the block welding leads to the difficulty in guaranteeing the profile tolerance of the inner surface of the nozzle extension section, improves the welding quality, reduces the rejection rate and production cost of the finished product, improves the production efficiency, has a wide application prospect, and any large-diameter thin-walled product can be processed according to the method of the present application.

The application discloses a welding reverse deformation adaptive control method, a medium plate automatic grouping and welding method and system based on visual technology, and relates to the technical field of welding deformation control. The control method comprises the following steps: inputting material physical performance, process parameters and welding piece geometric size information into a main control system; calculating a welding piece temperature field, a stress field and a deformation field, learning and analyzing data to obtain the influence of the data on the welding piece deformation, and simulating and predicting the welding deformation; driving a servo motor by a control unit to drive a pressure head body to move, contacting a vertical plate and applying pressure according to a preset pressure, completing positioning through servo motor torque feedback, and generating a pre-deformation opposite to the predicted welding deformation; when welding, the vertical plate generates a positive deformation due to thermal stress, and the pre-deformation pressure and the thermal stress are offset; comparing the simulation prediction result of the welding deformation with the actual measurement result, and adjusting parameters according to the comparison result. The application realizes intelligent manufacturing of a turntable series product in a whole process, reduces or cancels personnel participation, and eliminates the interaction between personnel and equipment automatic operation.

This utility model relates to a welding deformation correction device for steel structure components, belonging to the field of steel structure component production technology. It includes a traveling track and a self-propelled trolley that travels along the length of the track. A vertical support column is mounted on the self-propelled trolley, and a horizontal support cantilever is mounted at the top of the support column. A first mounting seat and a second mounting seat, movable and lockable along the length of the horizontal support cantilever, are mounted on the horizontal support cantilever. A gas torch and a correction detection device are respectively mounted on the first and second mounting seats. This utility model has the following advantages: the self-propelled trolley, carrying the gas torch and correction detection device, moves along the length of the steel plate, enabling a more uniform movement speed of the flame torch and better heating of the steel structure component. The gas torch is used for flame correction of the steel plate. The correction detection device is used to detect the flame correction effect and prevent overcorrection as much as possible.

This utility model relates to the field of welding technology, specifically an electron beam welding fixture for clamping a workpiece. The workpiece consists of a flat portion and a bridge-shaped portion, with the two flat portions respectively located on both sides of the bridge-shaped portion. A groove is provided on the back of the bridge-shaped portion, and a ring of welds consisting of a straight weld and a circular arc weld on opposite sides is provided on the bridge-shaped portion. The fixture includes an "L"-shaped plate composed of a horizontal plate and a vertical plate. The horizontal plate consists of a fixture flat portion and a fixture bridge-shaped portion that respectively mate with the flat portion and the bridge-shaped portion of the workpiece. A protrusion on the fixture bridge-shaped portion mates with the groove on the back of the bridge-shaped portion. A workpiece positioning structure and a workpiece fastening structure are provided between the flat portion of the workpiece and the fixture flat portion. This electron beam welding fixture can reduce welding deformation of special structure workpieces, ensure post-weld dimensional accuracy, ensure the welding quality of arcs and junctions, and meet special welding requirements.

The present application belongs to the technical field of shipbuilding, and discloses a hatch cover protection tool, which comprises an inner support mechanism and a plurality of locking mechanisms. The inner support mechanism is arranged inside the hatch cover and comprises a plurality of support frames arranged at intervals along the height direction of the hatch cover, wherein each support frame comprises a plurality of support rods arranged in a cross shape. The locking mechanisms are detachably connected to the surrounding wall of the hatch cover in the circumferential direction, and the end portions of the corresponding plurality of support rods in the height direction of the hatch cover can be connected to one locking mechanism. The hatch cover protection tool has good welding deformation resistance and can effectively protect the hatch cover during the entire shipbuilding process.

The application discloses a device for reducing welding and machining deformation of the end of a large-size cathode roller, which comprises a base, a pushing mechanism, a lifting mechanism, a support seat and a bearing plate, the side wall of the support seat is provided with the bearing plate, the side wall of the support seat is provided with a motor, the end of the bearing plate away from the support seat is provided with a support ring, the support ring is provided with detection welding mechanisms, the detection welding mechanisms are symmetrically arranged in two groups, after the cathode roller is clamped, the pushing mechanism and the lifting mechanism drive the support ring to be located at the center directly above the cathode roller, the distance sensor detects the distance change process of the suspension end of the swing rod, at this time, the lifting mechanism stops working, the electric wheel rotates to drive the support ring to rotate along the sliding plate, so that the welding gun welds the end of the cathode roller, when the two groups of detection welding mechanisms are arranged to weld the weld of the cathode roller, the welding efficiency of the weld of the cathode roller can be improved, and the welding deformation can be reduced.

The invention relates to the technical field of steam exhaust flow guide rings, in particular to a steam exhaust flow guide ring of an ultra-supercritical unit, and aims to solve the problems that a traditional welded steam exhaust flow guide ring is deformed due to welding, the deviation between an actual molded line and a theoretical design is large, and the pneumatic efficiency of steam exhaust is seriously influenced. The flow guide ring body and the low-pressure inner cylinder are manufactured in an integral casting mode, the last-stage movable blade of the movable blades is located in a ring body formed at the joint of the flow guide ring body and the low-pressure inner cylinder, and the inner circle part of the flow guide ring body is provided with a tail blade top part flow guide ring in clearance fit with the last-stage movable blade. A steam exhaust flow guide ring of a connecting structure is innovatively optimized into a steam exhaust flow guide ring of a structure integrally cast with the low-pressure inner cylinder, all flow guide ring molded lines are guaranteed through finish machining, and the consistency of the actual working state and the theoretical design of the steam exhaust flow guide ring is guaranteed.

The invention relates to a nozzle machining process based on friction welding and argon arc welding. The nozzle machining process comprises the following steps that S1, a blank is machined; s2, assembling is carried out; s3, welding is conducted; and S4, the nozzle part is machined. On one hand, the split type design is adopted, the multiple connecting parts are correspondingly attached to the side edge of the cover plate in the circumferential direction, the nozzle body supports the inner wall of the cover plate, a supporting foundation is provided for friction welding, meanwhile, the nozzle part and other characteristics are machined step by step, accurate assembly and welding are ensured, and welding deformation is effectively reduced; and on the other hand, based on cooperation of friction welding and argon arc welding, comprehensive welding is achieved, the welding missing probability is reduced, the machining cost is low, the yield is high, and the requirements of single-piece and batch production are met.

The invention relates to a construction method of a load measurement unit. The construction method comprises the following steps: S1, manufacturing a guide frame structure; s2, a support structure is manufactured, specifically, the support structure is divided into two parts to be manufactured, and the two parts are a truss structure and a base structure; s3, machining the support structure; according to the construction method, the load test units are manufactured in a segmented mode, each segment is constructed in the four stages of scribing, manufacturing, welding and overall machining, the flatness is accurately controlled through the scribing stage, the precision of a follow-up machining datum plane is ensured, flatness out-of-tolerance caused by welding deformation is avoided, overall scribing is conducted after welding is completed, and the construction efficiency is improved. Welding stress deformation is eliminated, the relative position precision of all key components is ensured, accumulative errors of step-by-step machining are reduced, and therefore the rework rate is effectively reduced, the construction efficiency is improved, and meanwhile high-precision control over the load measuring unit is achieved.

The seat ring welding anti-deformation device comprises a manhole cover and a tank body top plate, a manhole seat ring is assembled at the bottom of the manhole cover, a mounting hole is formed in the tank body top plate in a penetrating mode, and the manhole seat ring penetrates through the mounting hole to be placed into the tank body top plate and is fixedly welded to the tank body top plate. A manhole sealing ring clamping groove is formed in the upper portion of the manhole seat ring, a manhole sealing ring is installed in the manhole sealing ring clamping groove, and the manhole cover presses the manhole sealing ring to be assembled with the manhole seat ring. The hoop type manhole seat ring welding anti-deformation device is reasonable in structural design, the annular hollow pressing plate formed by machining a thick steel plate is combined with the high-strength bolts and nuts to form the hoop type manhole seat ring welding anti-deformation device, the weight can be reduced, machining equipment and the machining process are relatively simple, the implementation effect of reducing manhole seat ring welding deformation is good, and the service life of the manhole seat ring is prolonged. And the probability of air leakage after the manhole cover is installed and various reworking costs are reduced.

The invention belongs to the technical field of welding, and discloses a welding deformation control method and device, electronic equipment and a storage medium. The method comprises the steps that key features in an acceptance target for a target structural part and constraint conditions of the key features are determined; the welding process parameters and the assembly constraint conditions are input into a pre-constructed welding deformation prediction model, and the deformation of the key features after welding is obtained through simulation welding; calibrating the welding deformation prediction model by using the actually measured data so as to enable the prediction error of the deformation to be within a preset error range, and obtaining the calibrated deformation; solving the reverse compensation amount of the key features before welding by taking the constraint condition as a target and the calibrated deformation amount as input; and the reverse compensation amount is converted into a manufacturing instruction, welding is conducted based on the manufacturing instruction, and the target structural part is obtained.

The application provides a nuclear reactor core device and a preparation method thereof, and belongs to the technical field of material welding. The preparation method of the nuclear reactor core device comprises the following steps: preparing a rib plate assembly, a W-shaped plate assembly and a C-shaped plate assembly; assembling multiple W-shaped plate assemblies and C-shaped plate assemblies into a whole circle and fixing the same by using inner and outer support tools, performing automatic welding by using a laser symmetrical welding method, and forming a W / C-shaped plate assembly; synchronously and alternately welding the W / C-shaped plate assembly on the inner and outer sides by using two automatic wire filling welding guns by using a double-sided layered symmetrical welding method, and realizing the connection of the W / C-shaped plate assembly with a bottom plate and a top plate; performing automatic butt welding of an outer half-ring plate by using laser welding and laser wire filling welding; and finally, welding internal fillet welds and performing nondestructive testing. By the cooperation of laser welding, automatic MIG welding, special tools and a symmetrical welding sequence, high-quality and high-efficiency automatic welding of the core containment vessel is realized, and welding deformation is effectively controlled.

The utility model provides a container ship hatch coaming thick plate weld joint preheating and post-heating process device, which relates to the field of heating process devices, and comprises a support plate, a brushless motor driving wheel, a positioning upright post and a support upright post, a worm gear lifter is arranged on the supporting upright post and is used for driving the heating working platform above to lift; the heating working platform is connected with an induction electric heater through a sliding rail and a support, and horizontal adjustment of the heating position is achieved. The positioning stand columns are located in the positioning grooves, can move transversely and are provided with screwing bolts to clamp the steel plate. According to the device, the adjustable induction heater is carried through the movable platform, non-contact preheating and post-heating of a welding seam are achieved, welding deformation can be prevented, and the device has the advantages that working hours are saved, efficiency is improved, and operation is convenient.

The invention relates to the technical field of laser welding, in particular to a water curtain cooling stainless steel pipe intelligent laser welding device which comprises a machine body, and a welding mechanism is arranged on the machine body and used for stainless steel pipe welding machining. The water curtain assembly comprises a lower ring frame fixed to the outer wall of the lower end of the laser welding device, L-shaped supports are pivoted to the outer walls of the left end and the right end of the lower ring frame, round sleeves are fixed to the outer ends of the L-shaped supports, nozzles are installed in the round sleeves in a penetrating mode, an upper ring frame is fixed to the outer wall of the upper end of the laser welding device, and first air cylinders are pivoted to the outer walls of the left end and the right end of the upper ring frame. The lower output end of the first cylinder is pivoted with the upper end of the L-shaped bracket; the welding seam is precisely covered and rapidly cooled through the dynamically adjusted flat water curtain, the intergranular corrosion tendency is remarkably restrained, welding deformation is reduced, meanwhile, air is isolated to improve surface oxidation, and the corrosion resistance, the size precision and the appearance quality of a connector are comprehensively improved.

The invention discloses a welding process device and method for a gate of a side wall thin-wall frame structure of a motor train unit project. The welding process device comprises a bottom support supported at the bottom of the device. The side wall upper edge clamping assembly is arranged on the upper portion of the bottom support and used for clamping and fixing the upper edge of a side wall. The cross beam clamping assembly is arranged at the upper part of the bottom bracket and is used for positioning and fixing an upper edge and a door frame cross beam; a water storage and slow cooling structure is arranged between the side wall upper edge clamping assembly and the upper edge of the side wall, the specific heat capacity of a medium filled in the water storage and slow cooling structure is larger than that of a body material of the water storage and slow cooling structure, and the thermal conductivity of the water storage and slow cooling structure is smaller than that of the body material of the water storage and slow cooling structure. According to the process device and method, welding deformation can be effectively controlled, the welding quality and the production efficiency are improved, and good application prospects and popularization value are achieved.

This application relates to the technical field of steel beam fabrication, and in particular to a novel welding process for corrugated web steel beam structures, comprising the following steps: S1, welding preparation: cleaning the weld joints of each component of the steel beam to ensure welding quality; S2, welding: S2.1, locating welding: first, correcting the verticality of each component of the steel beam and then spot welding for fixation, using symmetrical locating welding; S2.2, formal welding: performing symmetrical full welding of the steel beam, using segmented welding, skip welding, or a combination of both to reduce welding deformation and welding misalignment; S3, cleaning and corrosion protection: cleaning the weld joints and then applying paint for corrosion protection. This application has the effect of improving the load-bearing capacity of bridges.

The utility model provides a control welding deformation's reverse deformation device belongs to welding device technical field. It includes the fixed placement platform of support column installation, is hingedly provided with the rotary placement platform on the fixed placement platform, is provided with the drive assembly for driving rotary placement platform rotation on the work table, the pressing assembly for pressing work piece is installed on the fixed placement platform and rotary placement platform, the support plate is slidably installed on the work table, the sliding block one is slidably installed on the support plate, the threaded column is screwy installed on the sliding block one, is provided with the inner plastic plate and the outer plastic plate for shaping the limit of two welding plate welding place on the threaded column. Through the utility model discloses a control welding deformation's reverse deformation device, and the inner plastic plate and the outer plastic plate can timely shape the limit of welding position, and the cooperation of telescopic push rod and pressing frame can easily realize the pressing of work piece, and the operation is simple, prevents the arching phenomenon of board when welding.

This invention provides a method for analyzing assembly deviations in ultra-large structures with non-uniform stiffness condensation, comprising the following steps: S1: dividing the ultra-large structure into a plastic region and an ultra-large stiffened elastic region; S2: constructing a model for the non-uniform stiffness condensation of ultra-large structures suitable for the network-like concentrated distribution characteristics of assembly deviations; S3: establishing an overall stiffness model of the ultra-large structure described by the weld region and its interface; S4: considering the influence of welding deformation during the welding process, introducing a welding stress field, and establishing a welding deviation analysis model based on the deformation coordination relationship before and after assembly in the plastic region; solving for the welding deviations of the ultra-large structure, thereby realizing the prediction and analysis of assembly deviations in ultra-large stiffened structures. This invention's method for analyzing assembly deviations in ultra-large structures with non-uniform stiffness condensation enables the prediction and analysis of assembly deviations in ultra-large structures with overall flexibility and local rigidity, providing a theoretical basis for compensation and control of assembly deviations in ultra-large structures, and improving product assembly quality.

The invention discloses a steel structure cross column welding method, and belongs to the technical field of steel structure machining. The method comprises the steps that a first cross column single body and a second cross column single body with different sections are manufactured; the first supporting seat and the second supporting seat with the preset height are used for fixing the two parts, and automatic and accurate centering of the center line is achieved; installing an annular metal piece matched with the single body as a reference platform; welding a connecting web III; an adjustable fixing plate and a limiting bolt which are installed on the annular metal piece are used for sequentially carrying out outer side jacking, accurate positioning and rigid restraining on the four flange plates III, and butt welding of the flange plates III and single flanges at the two ends and angle welding of the flange plates III and the web plates III are sequentially completed; and finally, all tools are dismantled. The core of the device is that high-precision positioning, active control over welding deformation and high-quality welding seam forming are achieved through a supporting seat automatic centering system and an adjustable outer side rigid restraint system, and the device has the advantages of being easy and convenient to operate, stable in quality and free of tool damage.