763 results about "Deformation control" patented technology

Disclosed in the present invention is a large complex ellipsoidal part machining deformation control method based on dynamic cutting planning. The method comprises: performing initial clamping on a blank part, constructing a machining coordinate system, completing reference non-contact measurement and reference surface fitting of inner and outer shape surfaces of the blank part, and completing the division of a generatrix tangent plane; on the basis of product feature decomposition, completing in the same coordinate system the comparison between each theoretical section and an actually measured section, completing cutting evaluation based on the generatrix tangent plane in a machining area, and guiding overall machining route planning and local machining route planning; on the basis of route planning and a cuttable margin, using an adjustable support device to complete part clamping based on dynamic adjustment, so as to realize stable cutting under a variable cutting thickness, and thereby solving the problem of overall deformation control of a large complex ellipsoidal part; and completing high-rib feature twist amount identification in combination with adjustable support, and completing tool path trajectory offset compensation on the basis of a relationship between a circumferential offset and an allowance, and thereby realizing precise compensation machining of a mesh after a local twist. The present invention solves the key difficulties of high-rib local twist deformation compensation and overall deformation control on the basis of ensuring the precision of the residual wall thickness during numerical control machining of a large complex thin-walled ellipsoidal part, thereby further improving the overall manufacturing reliability of a large complex ellipsoidal part.

The invention discloses a deep foundation pit stability deformation control method and device based on digital twinning. The method comprises the steps that monitoring time sequence data of a deep foundation pit are collected and obtained; constructing a deep foundation pit deformation control digital twin platform; constructing a CNN-LSTM composite neural network based on an Adam optimization algorithm through a foundation pit deformation prediction module, and performing model training / verification on the CNN-LSTM composite neural network through the data training set and the data verification set to obtain an optimized CNN-LSTM composite neural network; based on the optimized CNN-LSTM composite neural network, performing time sequence change prediction on the axial force of the steel support according to the data test set to obtain a prediction result; the steel support servo module realizes servo control on the axial force of the steel support according to a prediction result on the basis of a constructed servo control strategy; and the foundation pit BIM module is used for constructing a deep foundation pit BIM model based on a Revit modeling technology and interacting with the deep foundation pit BIM model in real time through a RevitAPI data interface according to the output of the steel support servo module so as to realize visualization of deformation control of the deep foundation pit. The problems that in the deep foundation pit construction process, due to the fact that complex geological conditions are involved, the surrounding environment and an existing building are affected to a certain degree, and deformation and stability of the deep foundation pit cannot be accurately controlled are solved.

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 embodiment of the invention provides a turning and milling combined machining deformation control method and system for a special-shaped part, and is used for the technical field of numerical control machining. The turning and milling combined machining deformation control method for the special-shaped part comprises the steps that structural feature analysis and process association marking are conducted on design data of the special-shaped part to generate a feature association data set, and clamping and process planning are conducted according to a machining constraint database and the feature association data set to generate initial turning and milling combined machining process data; cutting parameter multi-objective optimization solution is carried out on the initial turning-milling combined machining process data to obtain a turning-milling cutting parameter set, and multi-axis linkage analysis and instruction collaborative planning are carried out on the turning-milling cutting parameter set according to the equipment operation feature set to generate a combined machining control instruction set. According to the method, through part key feature recognition and risk marking, combined machining control instructions are generated after layered digital twinning verification in combination with process multi-objective optimization, and the one-time qualified rate of special-shaped part machining and turn-milling combined machining process stability are improved.

The present invention provides a steel support system for foundation pit support, belonging to the field of foundation pit support, and is used to support the foundation pit in foundation pit engineering. Foundation pit construction is extremely likely to cause damage such as settlement of surrounding buildings and municipal pipelines, so there are very high requirements for construction quality and deformation control. In the prior art, the steel supports that can achieve axial force compensation have problems of high cost and weak structure. This steel support system includes a plurality of steel supports, and both ends of the steel supports are respectively connected to the foundation pit side through quick-installation and quick-disassembly structures. The steel support includes a flexible section and an adjustment section. Two flexible sections are respectively arranged at both ends of the steel support. The flexible section includes a flexible head and a fixed head that are slidably matched, and the adjustment section is arranged inside the steel support. With the cooperation of the sliding function of the flexible section and the telescopic function of the adjustment section, the overall length of the steel support can be adjusted. In the present invention, the entire steel support system only requires a set of servo adjustment mechanisms, having the effects of low cost and high reliability.

The invention relates to the technical field of construction control, in particular to an underground super-long thick and large concrete structure construction control method and system.The method comprises the following steps that through vertical displacement and strain data, trend extraction nodes are analyzed, difference sections are divided, load recognition influence areas are positioned, and structural sections are sequenced according to fluctuation increments; and adjusting cooling, supporting and loading parameters to form an intervention arrangement, and performing year-on-year adjustment based on construction data to generate feedback to complete regulation and control. According to the method, load-deformation dynamic mapping is established through time sequence association of displacement and strain data, a difference section identification mechanism is constructed based on time difference comparison, natural deformation and load surge response are distinguished, fluctuation characteristics of a load surge section are extracted to form response sensitivity ranking, and cooling parameters and a loading sequence are dynamically adjusted in combination with increment comparison. Graded regulation and control are realized, space-time dimensions of construction records and monitoring data are coupled, the crack positioning precision is improved, the predictability of deformation control is enhanced, and the regulation and control redundancy cost is reduced.

The invention relates to the technical field of aero-engines, in particular to a weak-rigidity welding casing blade bending deformation control method which mainly comprises the following steps: firstly, setting the steps of performing electron beam welding on a blade, an inner casing and an outer casing: positioned welding, penetration welding and modification welding; then setting the electron beam welding sequence of strip welding seams between the blade and the inner casing as well as between the blade and the outer casing as the third welding seam, the fourth welding seam, the first welding seam and the second welding seam; and finally, the electron beam welding step in the first step is executed on the four welding seams according to the electron beam welding sequence determined in the second step. According to the mechanism of generation of welding buckling deformation, the welding buckling deformation of the blade is compensated by setting the steps of weak-rigidity cartridge receiver blade electron beam welding and setting the welding sequence, the straightness of the cartridge receiver blade is controlled, meanwhile, the influence on stress concentration parts such as a blade body anti-icing groove hole is reduced, the probability of fatigue cracks is reduced, and the service life of the cartridge receiver blade is prolonged. Therefore, the service life of the engine case is prolonged.

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 metal processing, in particular to a zirconium alloy plate texture control method for regulating recrystallization based on cold rolling deformation. The zirconium alloy hot-rolled plate blank is subjected to annealing treatment, so that an equiaxial grain structure with the proper size is obtained; cold rolling treatment is conducted on the zirconium alloy plate blank obtained after annealing treatment, different rolling deformation accumulation modes are introduced through total deformation design, rolling pass control and pass deformation control, and different dislocation and subgrain distribution states are formed in the zirconium alloy cold-rolled plate; and the zirconium alloy plate strip prepared through cold rolling deformation is subjected to annealing treatment, so that a completely recrystallized plate with refined grains and weakened texture is obtained, and the plasticity and forming performance of the zirconium alloy plate are improved. The technological process is simple, the recrystallized zirconium alloy plate with the basal texture weakened can be obtained only by slightly changing the zirconium alloy plate machining technology, the anisotropy of the zirconium alloy plate can be reduced, and therefore the use performance of the zirconium alloy plate is improved.

The invention discloses a welding deformation pre-control device of an H-shaped steel assembling, welding and correcting all-in-one machine, and relates to the technical field of H-shaped steel welding, the welding deformation pre-control device comprises a welding table and a workpiece, and further comprises a deformation pre-control mechanism connected with the welding table and used for performing deformation control on the workpiece before welding; the deformation pre-control mechanism is installed to pre-control a wing plate and a web plate before welding, deformation of the wing plate and the web plate is controlled in the welding process, correction is not needed through pre-control over the web plate and the wing plate, and the H-shaped steel machining efficiency and the H-shaped steel machining quality are improved; the upper pressing combination mode is changed by installing the web side pressing limiting mechanism, pressure is applied from the side face, the workpiece machining stability is guaranteed in the welding process, the situation that a workpiece inclines due to upper pressing is avoided, and the workpiece machining quality is guaranteed; and heat generated in the welding process is reduced by installing the staggered welding mechanism, the deformation amplitude is reduced, the cooling speed is increased, and the machining efficiency is improved.

The invention discloses a harmful deformation prevention and control method for a hydraulic soft rock tunnel, and the method comprises the steps: carrying out the preliminary classification of the surrounding rock of the tunnel according to the geological survey result of the tunnel, and dividing a deformation control target into four grades; supporting measures which are based on harmful deformation classification and conform to the deformation characteristics of the red-bed soft rock tunnel are provided by considering the characteristics of water physical property, rheological property and the like of the red-bed soft rock; in the construction stage, a soft rock tunnel harmful deformation analysis method under the seepage-rheological coupling effect is adopted for determining the reserved deformation amount, and according to an improved constraint-convergence method, the supporting opportunity is calculated and determined based on a surrounding rock characteristic curve and a safety coefficient; and finally, according to geological conditions exposed by excavation and necessary supplementary survey results, calculating and analyzing the harmful deformation index again, and dynamically adjusting the harmful deformation grade and the support measure of the specific hole section. According to the method, through a scientific supporting mode and dynamic management, tunnel deformation can be effectively controlled, and the adaptability and long-acting stability of red layer soft rock tunnel supporting are improved.

The invention discloses a cast-in-place concrete beam construction method based on deformation control, and relates to the field of cast-in-place beam construction. S2, foundation treatment; s3, a support is erected and pre-pressed; s4, a formwork is installed; s5, steel bars and prestressed pipelines are installed; s6, concrete construction; and S7, removing the bracket. BIM modeling and an intelligent monitoring system are combined, the foundation treatment range is expanded, an automatic drainage system is arranged, edge settlement and rainwater soaking are effectively avoided, a support system is selected according to needs, anti-sidesway design is strengthened, stress is accurately simulated through graded automatic loading and pre-pressing, reliable deformation data are ensured through double monitoring, pre-camber calculation is scientific, errors are reduced, and the construction efficiency is improved. Formwork, reinforcing steel bars and prestressed pipelines are installed in a standard mode, the structural quality is guaranteed, concrete construction pays attention to temperature control and maintenance, crack reduction and support dismantling are symmetrically carried out in a grading mode, the springback amount is monitored in real time, and construction safety is guaranteed.

The invention discloses a spiral anchor foundation grouting pressure-flow-deformation intelligent coupling control method, and relates to the technical field of foundation grouting technologies, and the spiral anchor foundation grouting pressure-flow-deformation intelligent coupling control method comprises the steps that according to specification parameters of a spiral anchor and the type of a soil body where the spiral anchor is located, a preset engineering parameter set is matched; collecting grouting data of each grouting channel, and calculating grouting deviation data in combination with the engineering parameter set; performing fuzzification processing on the grouting deviation data, and converting the grouting deviation data into fuzzy linguistic variables; inputting the fuzzy language variable into a preset fuzzy rule base for reasoning, and outputting a PID parameter correction amount; parameters of a PID controller are dynamically adjusted according to the correction amount, and a pump speed adjusting instruction is generated; executing the pump speed adjusting instruction, and collecting grouting data after execution; a soil body permeability coefficient is obtained through inversion by constructing a digital twinborn model, and the fuzzy rule base is optimized and updated by combining the executed grouting data. The method is used for solving the problem that a traditional spiral anchor foundation grouting technology is poor in adaptability to complex geology.

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 relates to a complex soft rock double-layer primary supporting super-large section tunnel and a construction method. The complex soft rock double-layer primary supporting super-large section tunnel comprises a long pipe shed cover arch supporting system, a deformation control strong supporting structure, an anti-disengaging early-warning lining pouring trolley, a temporary inverted arch deformation control structure and a buffering yielding supporting system. The method has the beneficial effects that the curved surface formwork can be rapidly installed on the upper portion of the guide pipe and the lower portion of the steel arch frame, the installation efficiency is high, stability is good, and the construction period is shortened; a long pipe shed and a small guide pipe penetrate through the deformation control strong supporting structure and are driven into a tunnel, grouting is conducted, the overall stability of the supporting structure is enhanced, and the complex soft rock geology is reinforced; concrete pouring is monitored in real time, and the compactness of vault concrete is guaranteed; section steel is clamped in the inverted arch, reinforcing connecting ribs are welded between the section steel in a penetrating mode, surrounding rock collapse is prevented, and tunnel construction safety is guaranteed. And a buffer yielding support device is arranged between the interface and the double-layer arch frame, so that the pressure at the interface of the layered rock and soil stratum is in smooth transition, and the overall balance is improved.

The invention discloses a clamp control method for vehicle body welding and a related device. The method comprises the steps that a mechanical dependency graph is generated according to mechanical characteristic data; a temperature gradient distribution diagram is generated according to the temperature monitoring data, region division is carried out, and a state fusion diagram is generated; the clamp is divided into four groups, namely a structure supporting group, a position positioning group, a deformation control group and an auxiliary fixing group, and release conditions are determined; performing a pre-release test on the fixture meeting the condition, and calculating a release risk value according to the structural strain data; and a resource configuration table is generated for the released clamps, and a reconfiguration scheme is formulated. According to the technical scheme, the clamps can be accurately grouped and dynamically released based on the real-time state of the welding process, efficient configuration of clamp resources is achieved while the welding quality is guaranteed, and the problems of resource waste and excessive constraint caused by a traditional whole-process clamping mode are solved.

The invention relates to the technical field of bridge engineering, in particular to an in-service steel bridge U rib and top plate crack double-face welding repairing method and application thereof. The method comprises the steps that the position of a crack is determined, a bridge deck pavement layer above the crack is removed, and the surface of a bridge deck slab in a crack area is cleaned; flattening the bridge deck slab on the two sides of the crack, and fixing the flattened bridge deck slab; u-rib internal welding construction process holes are formed; u rib inner welding reinforcing welding and weld leg increasing welding are carried out in an inner corner area where the U rib with the cracks is connected with the top plate; sealing and repairing the construction process hole; carrying out carbon arc air gouging on the crack above the bridge deck slab, and forming a gouging groove in the bridge deck slab; and polishing and multi-layer and multi-pass welding are carried out on the planed groove. The method is fused with an internal welding technology, is a comprehensive repair scheme with root treatment, double reinforcement, controllable deformation and reliable quality, thoroughly overcomes the technical defects of treatment of symptoms, no treatment of root causes, easy secondary damage, poor reliability and the like in the prior art, and remarkably prolongs the service life and the safety performance of the in-service steel bridge.

The invention relates to the technical field of pipe truss tubular joint welding quality control, in particular to an assembly type pipe truss tubular joint butt-joint tensioning anti-deformation welding method and system which comprises the following steps that S1, an intersecting line is divided in the circumferential direction, and butt-joint references and deformation monitoring point positions of all partitions are calibrated; s2, circumferential distributed tensioning force application point positions are set; s3, a differential pre-tightening force gradient in the circumferential direction of the intersecting line is set, and pre-tensioning force is applied; s4, synchronous cooperation of tensioning actions and deformation control of all the to-be-welded nodes is carried out; s5, welding is conducted in a partitioned and segmented mode, and the pre-tensioning force of the partition corresponding to the intersecting line is dynamically adjusted in the welding process; and S6, after welding, the pre-tensioning force of each subarea is released, and node deformation checking and precision correction are synchronously completed after force release. According to the dynamic pre-tightening force adjusting method for partition differentiation pre-tightening force gradient distribution and welding thermal cycle time sequence matching, the residual stress peak value of the node core area is greatly reduced, and the welding quality and the structural safety of the tubular node are remarkably improved.

The invention discloses a frozen soil area shallow-buried self-anchored pile foundation freezing and pulling prevention and control device and a construction method, the frozen soil area shallow-buried self-anchored pile foundation freezing and pulling prevention and control device comprises an anchoring cylinder, a sleeve, a pile foundation and a base, the pile foundation and the base are installed in the anchoring cylinder, the pile foundation is installed at the top of the base, and the anchoring cylinder is sleeved with the sleeve; through the arrangement of the upper block, the lower block, the upper open groove and the lower open groove of the anchoring barrel, the effect of changing the cross section in real time according to frost heaving development is provided for the anchoring barrel. Meanwhile, the stress condition of the pile foundation in the frost heaving period is optimized through the synergistic effect of the clamping blocks and the supports, when the upper block inclines inwards and deforms in the frost heaving period, the supports are extruded to contract towards the pile foundation, the gaps between the clamping blocks and the supports are gradually reduced till the clamping blocks make contact with the supports, the clamping blocks press the supports downwards, the supports apply downward force to the pile foundation, and the pile foundation is prevented from being pulled upwards. In addition, the stability and the anti-freezing and anti-pulling capacity of the pile foundation are enhanced through the base, and the shallow-buried pile foundation is promoted to meet the strict deformation control requirement.

The invention relates to a foundation pit deformation control method and system based on dynamic load compensation, and belongs to the technical field of foundation pit supporting and computers. The foundation pit deformation control method based on dynamic load compensation comprises the steps that S1, a hydraulic supporting unit is arranged on the inner side of a foundation pit supporting pile or an underground diaphragm wall, the pressure of the hydraulic supporting unit and the displacement amount of the supporting pile or the underground diaphragm wall are monitored in real time, and the supporting force needing to be provided by the hydraulic supporting unit is calculated; s2, foundation pit soil strain data are monitored in real time, vehicle position, speed and load data are obtained, and a dynamic load distribution model is constructed; and S3, constructing a foundation pit deformation prediction model by using an LSTM neural network, and predicting the influence trend of vehicle passing on foundation pit deformation so as to adjust the supporting force of the supporting structure in advance and automatically optimize the vehicle path at the same time. According to the method, deformation is actively controlled through a dynamic compensation mechanism, construction safety and stability of surrounding facilities are guaranteed, and the method is particularly suitable for sensitive areas adjacent to underground facilities or important buildings.

The invention provides a welding deformation control method for a high-temperature alloy ring type flame tube wall. The welding deformation control method comprises the following steps: S1, determining a welding seam form; s2, testing the welding deformation of the annular heating wire argon arc automatic welding; s3, the pre-deformation pressure of the flame tube wall is detected; s4, the pre-deformation amount is set; s5, welding pre-deformation is carried out; s6, flame tube wall hot wire argon arc automatic welding; and S7, flame tube wall measurement. According to a welding deformation generation principle, welding deformation is quantified and reasonable deformation compensation is set by exploring and testing a hot wire argon arc automatic welding deformation rule and deformation, so that hot wire argon arc automatic welding deformation prevention control of a thin plate flame tube wall is realized; on one hand, the problems that deformation cannot be controlled after constraint is released, residual stress is large and possibly generated stress cracks are caused by a rigid limiting method are avoided, on the other hand, deformation control can be carried out on parts which cannot be subjected to square limiting, and the machining quality of the thin plate welding flame tube wall is improved.

The invention relates to an anti-falling device integration method and system based on light guide rail coupling and deformation control, and the method comprises the following steps: carrying out the stress distribution scanning of a light guide rail through a laser interference measurement system, and obtaining a guide rail stress distribution map; based on the guide rail stress distribution map, carrying out dynamic rigidity analysis on the light guide rail to obtain a guide rail rigidity characteristic curve; carrying out coupling calculation on the light guide rail based on the guide rail rigidity characteristic curve to obtain guide rail coupling parameters; based on the guide rail coupling parameters, structural design and layout optimization are conducted on the anti-falling device, and an anti-falling device integration scheme is obtained; and performing virtual assembly and performance simulation on the integration scheme of the anti-falling device to obtain a performance evaluation report of the anti-falling system, thereby solving the technical problem that the integrated design of the anti-falling system generally lacks in-depth analysis on the mechanical characteristics of the guide rail body, so that potential safety hazards are difficult to find and correct in time.

The invention relates to the field of underground engineering and rail traffic engineering, in particular to a deformation control method for a double-line shield tunnel to underpass an existing railway soft soil roadbed, which comprises the following steps: S1, determining a grouting reinforcement range; s2, pile position and grouting hole position lofting is conducted in the reinforcing area, and a groove is excavated; s3, construction is conducted after the MJS pile main machine is in place, and drill bit trial spraying is conducted before a drill rod is placed; s4, after the drill rod reaches the specified depth, jet grouting is conducted till the designed elevation is reached, and the MJS pile main machine is moved to the next pile position sample placing point; s5, after the MJS pile reaches the designed strength, a drilling machine is arranged in place, and a formed hole is drilled to the designed depth; and S6, grouting is conducted, and then grouting and grout stopping section construction is conducted. The method has the advantages that corresponding reinforcement measures are taken in combination with the model, the shear strength of the soft soil is improved, the shear damage risk of the soft soil is reduced, deformation of the soft soil roadbed is controlled in time, and safety and stability in the shield underneath pass construction process are ensured.

The invention provides a deformation control device and method in the additive manufacturing process of a GH4099 hollow thin-wall component, and relates to the technical field of high-temperature alloy additive manufacturing, the deformation control device comprises a laser welding device which comprises a rotary table and an expansion tool, and the laser welding device is fixed to a mechanical arm; a temperature control tool, a side clamp and an upper clamp are sequentially arranged above the rotary table from bottom to top, and a heating wire is arranged in the temperature control tool; the linear expansion coefficient of the expansion tool is higher than that of the temperature control tool, the side clamp, the upper clamp and the GH4099 hollow thin-wall component, the melting point of the expansion tool is lower than that of the GH4099 hollow thin-wall component, a sheet metal hole is formed in a top plate of the GH4099 hollow thin-wall component, and the wall thickness of the GH4099 hollow thin-wall component is not larger than 1 mm. The to-be-welded part and the tool are rotated through the rotary table, the laser welding device is kept relatively static in the welding process, the expansion tool is positioned inside, the expansion tool is heated to expand in the welding process, the to-be-welded part is fixed, the to-be-welded part is melted and flows out after welding is completed, and deformation control over the GH4099 hollow thin-wall component is achieved.

The invention discloses a curing deformation control method for a composite material stiffened wallboard. The curing deformation control method is characterized by comprising the following steps: arranging at least two ribs on a to-be-stiffened surface of the stiffened wallboard; wherein geometric structure parameters of at least one rib are different from those of the other ribs, and bending deformation torque opposite to the other ribs in direction is generated, so that curing deformation and residual stress of the stiffened wallboard meet design requirements. According to the method, curing deformation is controlled on the premise that the pneumatic performance, the bearing performance and the like of the stiffened wall plate are not affected, and a preferable technical approach is provided for accurate manufacturing of the composite material stiffened wall plate.

The invention relates to the technical field of injection molding control, in particular to a bumper foam molding deformation control method based on artificial intelligence, which comprises the following steps: judging whether initial injection pressure exceeds a normal range required for inhibiting foaming, and adopting subsection control or predicting whether the fluidity of a foaming melt has an out-of-control risk; according to the out-of-control risk value, a corresponding adjusting strategy is adopted in combination with the weight coefficients corresponding to the multiple sprues, and the injection molding adjusting speed is obtained or the initial mold temperature is reduced; according to the injection molding speed and the weight coefficient of the multiple sprues, calculating and predicting whether the tail end of the cavity is subjected to material shortage and uneven foaming, and reflecting whether the adjustment degree of the initial injection molding speed and the mold temperature is reasonable or not through the material shortage risk; and determining the foaming degree of the foaming melt in the inspection mold according to the material shortage risk, or reducing the adjustment amplitude of the initial injection molding speed or the initial mold temperature and adjusting the actual cavity pressure in the mold to compensate the adjustment amplitude. The performance of the bumper is improved through the foaming forming technology.

The invention belongs to the technical field related to robot motion control, and discloses a reaction type robot motion deadlock avoiding method and device, and the method comprises the steps: (1) building a collision avoidance constraint used for guaranteeing that a robot does not collide with an environment object based on a control barrier function; a deformable control Lyapunov function is utilized to construct a convergence constraint for ensuring the robot to move to a target; (2) establishing a robot collision avoidance motion optimization model by taking minimum deviation between the robot and model control input as an objective function based on collision avoidance constraint, convergence constraint conditions and a robot dynamic model; and (3) detecting the motion deadlock risk of the robot in real time based on the robot collision avoidance motion optimization model, and regulating and controlling the shape parameters of the deformable control Lyapunov function based on the obtained deadlock type so as to avoid the motion deadlock of the robot. According to the method, deadlock is avoided by regulating and controlling the deformable control Lyapunov function, the method can depend on a prior environment model or a fixed rule, and generalization is high.

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 belongs to the technical field of mechanical manufacturing equipment, and particularly relates to a deformation control machining method for an aircraft alloy steel structural part and a self-adaptive clamping device. The device comprises a bottom plate (1), a spring steel sheet (2) and a plurality of process laps (3), the bottom plate (1) is a rectangular base, mounting grooves (10) are distributed in the upper end face of the bottom plate in an equally-spaced matrix array mode, and the spring steel sheets (2) are mounted in the mounting grooves (10). Threaded holes (4) and positioning pin holes (5) are distributed in the upper end face of the bottom plate at equal intervals in an array mode. A plurality of process laps are connected to the periphery of the structural part to be machined, two of the process laps (3) are installed on the positioning pin holes (5) located in the same straight line to form a machining reference axis, and the other process laps (3) are distributed on the two sides of the reference axis; the process lap (3) is provided with a groove (6) in the thickness direction of the blank, a pressing plate is clamped in the groove, and the pressing plate is locked and fixed to the bottom plate through a bolt.

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.