1159 results about "Forming processes" patented technology

The invention belongs to the technical field of high polymer material design and intelligent manufacturing, and discloses a machine learning driven epoxy resin based composite material thermal-mechanical property aided design method, which comprises the following steps: S1, data acquisition and feature construction; s2, performing feature screening; s3, constructing and training an interpretable prediction model; s4, carrying out reverse design and optimization; and S5, performing closed-loop verification and updating. According to the method, the quantitative relation of structure-process-performance is constructed through an interpretable machine learning model, and the contribution mechanism of each factor is revealed by means of SHAP analysis. And finally, reversely designing an optimal epoxy resin monomer structure and a matched curing process according to the performance target. The limitation of a traditional trial and error method is broken through, collaborative optimization of the material structure and the forming process can be achieved, and the development efficiency of the epoxy resin-based carbon fiber composite material is remarkably improved.

The invention provides a parameter monitoring method and system in a composite material preparation process based on optical fiber sensing, computer equipment and a medium, and belongs to the field of composite material detection. Center wavelength signals in the resin diversion stage are continuously collected through optical fiber strain sensors in a distributed optical fiber grating sensing array, and the distributed optical fiber grating sensing array is embedded into the multiple layers of dry carbon fiber cloth in the fiber preform in advance; the flowing position and time of the resin in the fiber prefabricated body are determined according to the minimum value of the central wavelength signal offset in the resin flow guide stage, and the flowing front edge of the composite material is constructed according to the flowing positions and time of the resin corresponding to the optical fiber strain sensors in the fiber prefabricated body. According to the method, the change of the structure state of the composite material in the resin diversion process can be continuously monitored in a complex variable-temperature environment, and the accurate monitoring of the three-dimensional resin flowing front edge in the composite material liquid forming process is realized.

The invention discloses an aircraft fairing and a fairing body composite material integrated forming process, and relates to the technical field of aviation equipment manufacturing. The forming process comprises the following steps: 1) preparing a prepreg; (2) sectional forming; 3) a curing process; (4) demolding and trimming; 5) an assembly process; the whole of the front section, the middle section and the tail section of the fairing is of a long-size U-shaped streamline structure. According to the invention, through molecular collaborative design of fluorination modification-polysiloxane toughening-cyanate ester interpenetration, the key contradiction of a high-performance fairing material is systematically solved; ultrahigh strength and toughness are realized at the same time by utilizing in-situ nano microphase separation; a dense graphite carbon layer is generated through catalysis, so that efficient halogen-free flame retardance is achieved; by means of the partition design of molecular fluorination and surface metallization, the high wave transmission and lightning protection functions are ingeniously unified. And finally, a new generation of aircraft fairing composite material with force bearing, wave transmission, heat resistance, impact resistance and environmental stability is successfully prepared.

The invention discloses a selective laser melting high-temperature preheating device with high-precision temperature control. The selective laser melting high-temperature preheating device comprises a laser; a forming cylinder; the piston is arranged in the forming cylinder in a lifting manner; the mounting plate is arranged on the piston, and a first accommodating groove is formed in the top surface of the mounting plate; the heating plate is arranged in the first accommodating groove and is provided with a heater; the forming base plate is arranged above the heating plate and is provided with a temperature sensor; the cooling mechanism is used for cooling the piston, the mounting plate, the heating plate and the forming base plate; a heat insulation plate is arranged between the bottom wall of the first containing groove of the installation plate and the heating plate. The invention further discloses a selective laser melting high-temperature preheating method with high-precision temperature control. Through the mode, the problem of cracking caused by overlarge temperature gradient in the SLM forming process is solved, the problems of low preheating temperature, low cooling speed and inaccurate temperature control of the formed substrate are also solved, the powder laser absorptivity can be improved to a certain extent, the scanning speed is increased, and the production efficiency is improved.

The invention relates to a sealing structure of a flexible waterproof FFC wire harness and a forming process, and belongs to the technical field of automobile electronic wire harness manufacturing, the sealing structure comprises an FFC wire, a connector shell, a sealing ring and a blanking cap, the sealing ring is made of a fluororubber and hydrogenated butadiene-acrylonitrile rubber composite modified material, the connector shell is made of a glass fiber reinforced PP or PA66 material, and the blanking cap is made of a glass fiber reinforced PP or PA66 material. Under the cooperation of a vulcanizing agent system and an anti-aging agent system, double-material injection molding is adopted for integral forming, and double sealing is achieved through interference fit of the blanking cap and the sealing ring. The waterproof grade of the FFC wire harness reaches IP67, the weight is reduced, the size is reduced, the production efficiency is improved, and the FFC wire harness can be widely applied to wet area scenes such as automobile door lines, ceilings and seats, has the cost advantage and the environmental protection benefit, and has remarkable industrial application value.

The invention discloses a forming method of a flash memory unit. The forming method comprises the following steps: providing a semiconductor substrate; forming a tunneling oxide layer on the semiconductor substrate; forming nanocrystalline silicon particles on the tunneling oxide layer; forming an isolation insulating layer on the tunneling oxide layer and the nanocrystalline silicon particles; and forming a control grid on the isolation insulating layer, wherein the step of forming the nanocrystalline silicon particles on the tunneling oxide layer comprises: forming an amorphous silicon layer on the tunneling oxide layer; and performing repeated seed crystal particle forming processes on the amorphous silicon layer, wherein surface annealing treatment is performed between two adjacent seed crystal particle forming processes, and an annealing process is performed after the last seed crystal particle forming process. The flash memory unit can be used for storing a large quantity of electrons, and has high performance.

The invention discloses a fiber-reinforced thermoplastic resin-based composite material based on dynamic reversible interface interaction and a preparation method and a recycling method thereof. The fiber-reinforced thermoplastic resin-based composite material comprises a modified thermoplastic resin matrix and a modified fiber reinforcement which are compounded with each other, the modified thermoplastic resin matrix and the modified fiber reinforcement are bonded and connected through dynamic bonds with dynamic reversible interface interaction. Through construction of dynamic reversible interface interaction in the fiber-reinforced thermoplastic resin-based composite material, infiltration compounding and interface bonding between a fiber reinforcement and a high-viscosity thermoplastic resin melt can be enhanced, and interface debonding and total-value recycling of the fiber reinforcement in the composite material recycling process can be effectively promoted; therefore, the bottleneck problems of poor wettability in the forming process, low bonding fastness at a heterogeneous interface, insufficient mechanical properties, low waste recovery value and the like confronted by the development of the fiber-reinforced thermoplastic composite material are effectively solved.

The application discloses a controllable pattern injection mold, and relates to the technical field of injection molds, which comprises a mold cavity and an injection runner in communication with the mold cavity, and a pattern forming part is arranged in the mold cavity and / or the injection runner. The controllable pattern injection mold can control the pattern forming process, can form specific patterns, and can reduce production cost and make the production process more environmentally friendly.

The invention discloses a shoe sole mold additive manufacturing process, and relates to the technical field of shoe sole molds, the shoe sole mold additive manufacturing process comprises the steps of early-stage data processing, printing matrix preparation, metal 3D printing, post-processing, quality inspection and finished product mold assembly, a complex structure difficult to machine through a traditional process can be achieved, and various metal materials such as aluminum alloy, stainless steel and titanium alloy are supported; the yield and quality of the parts are improved through the high-precision forming process; meanwhile, by means of the technology, optimization design of a conformal cooling water channel and the like can be achieved, so that the performance of the mold is improved, and good cost benefits are achieved when high-cost materials are used or small-batch production is conducted.

The invention relates to the field of aircrafts, and discloses a sandwich-structured composite material mute paddle, which comprises a paddle blade, and the paddle blade is a sandwich carbon fiber laminated structure composed of an upper layer prepreg laying layer unit, a foam sandwich layer and a lower layer prepreg laying layer unit; the upper-layer prepreg laying unit and the lower-layer prepreg laying unit are each of a bionic spiral structure formed by stacking multiple layers of composite material prepreg sheets in a bionic spiral laying sequence. The invention further discloses the preparation method of the composite material mute paddle of the sandwich structure. Load can be effectively transmitted and dispersed along fiber paths in different directions in the outer-layer prepreg bionic spiral structure, so that the comprehensive rigidity, the torsional property and the damage tolerance of the paddle are improved, the material characteristics are optimized, a three-section type pressurization method is adopted, a stable external pressure environment is established in the early stage of paddle foaming, and the mechanical performance of the paddle is improved. And dynamic balance and collaborative forming of internal and external pressure in the paddle forming process are achieved.

The invention discloses a mold design method for a rubber part with a metal insert and a vulcanization molding process method thereof.The mold preparation method comprises the steps that firstly, a three-body type mold is designed according to the rubber part and comprises an upper mold, a middle mold and a lower mold, the middle mold, the upper mold and the lower mold are jointly positioned, and the middle mold and the lower mold are provided with glue overflowing grooves; 2, calculating the size of a mold cavity; step 3, mold preparation; the upper die, the middle die and the lower die are all made of 45 # steel, and the heat treatment hardness is 35-40 HRC; the roughness of the mold cavity part is 0.4, and the roughness of the matched part of the mold is 0.8. The vulcanization molding process method comprises the steps of rubber remilling, vulcanization molding, burr cleaning and inspection. Aiming at a rubber product containing an embedded metal ring, the problems of position control of an embedded part and difficulty in mold design are solved, and the problem of batch production is solved; the optimal product performance is ensured by the optimized vulcanization forming process; the environment-friendly effect is improved, and the waste rate is reduced.

To provide a packaging sheet which is very hard to break and can be easily manufactured by using an existing packaging sheet manufacturing apparatus, and a method for manufacturing the same.SOLUTION: The packaging sheet 18 includes a base material 22, a heat-resistant coating layer 24 located on a surface layer on a first surface 22a side of the base material 22, and a heat seal layer 26 located on a surface layer on a second surface 22b side of the base material 22. The base material 22 is a laminated body of a resin film 28 and two aluminum foils 30 (1), 30 (2) laminated and bonded so as to cover the front surface and the back surface of the resin film 28, respectively. When the packaging sheet 18 is manufactured, the base material 22 is prepared, and the functional layer forming step of forming a plurality of functional layers including the heat-resistant coating layer 24 and the heat sealing layer 26 is performed using the packaging sheet manufacturing apparatus 32 having the same specifications as in the case where the base material is a single-layer aluminum foil.SELECTED DRAWING: Figure 1

The invention discloses equipment and a method for customizing front and back morphology structures of an invar alloy ultra-thin strip, and belongs to the field of invar alloy ultra-thin strip processing. The equipment comprises a working roller with differentiated surface topography, a first middle roller with a polyurethane-based organic material coating layer, an ultrasonic clamping device, an integrated tension weighting control system and a central control unit. By configuring different surface roughness of the upper working roll and the lower working roll and combining stable transverse pressure stress and axial ultrasonic vibration provided by the first middle roll, asymmetric plastic flow and shape copying of metal on the front face and the back face of the strip are achieved. In the rolling process, plate shape defects caused by friction differences are dynamically compensated by cooperatively adjusting the roll shifting amount of the first intermediate roll and the convexity of the backing roll saddle, finally, customized production of the 4J36 invar alloy ultra-thin strip with the thickness of 15 microns is achieved, the A face and the B face of the strip have different surface roughness, and the surface roughness of the strip is greatly improved. And the specific requirement of a fine metal mask plate pore-forming process on the surface state of the base material is met.

The invention belongs to the technical field of material processing and manufacturing, and particularly relates to a multi-process complex loading process material deformation and performance unified prediction method and application thereof. Aiming at the technical defects of an existing material constitutive model in the aspects of cross-process applicability, multi-process historical effect characterization and formation-structure-performance whole-process unified evaluation, a unified internal variable system is constructed; by combining a multi-process unified constitutive theory, a multi-process composite loading path calibration method and a multi-data source collaborative parameter identification and simulation integration technology, unified prediction of deformation behaviors, structure evolution and post-forming performance of materials under different forming processes, different loading modes and complex historical paths is realized. Compared with the prior art, the method of the invention makes significant technical progress in the aspects of model versatility, prediction precision and engineering implementation convenience.

The invention belongs to the technical field of powder metallurgy, and particularly relates to a high-fluidity MIM metal feed and a forming process thereof.The high-fluidity MIM metal feed is composed of the following materials: metal powder: spherical metal powder (a titanium alloy TC4 material), polycaprolactone and graphene nanosheets; wherein the volume ratios are 68-72 vol%, 0.5-2 wt% (based on the mass of the metal powder) and 0.1-0.5 wt% (based on the mass of the metal powder) respectively; a powder oxide layer is removed through vacuum plasma cleaning (300-500 W, argon atmosphere), a metal core-PCL / graphene shell structure is prepared in combination with ultrasonic-assisted in-situ polymerization, lubrication and adhesion enhancement are synchronously achieved, the powder oxygen content is controlled to be smaller than 500 ppm, and sintering oxidation defects are reduced.

The invention discloses a TC11 titanium alloy thick-wall pipe diameter forging process parameter optimization method, which relates to the technical field of metal plastic forming process optimization, and comprises the following steps: clearly defining a structure defect problem caused by non-uniform deformation energy in diameter forging of a specific pipe blank and an optimization target; constructing a simulation model to calculate forming sizes and internal deformation energy distribution under different process parameters; training a neural network agent model embedded with a deformation energy uniformity optimization target; using the model to drive a multi-objective optimization algorithm, and automatically searching an optimal process parameter combination; and selecting and outputting a final optimal process parameter from an optimization result. According to the method, the quantitative index reflecting the deformation energy distribution uniformity is embedded into the process optimization model, so that the internal deformation energy distribution of the material can be collaboratively optimized while the macroscopic size is optimized, and the problem that the recessive factor which affects the final structure performance of the component is difficult to effectively evaluate and actively regulate and control in the process design stage in the existing method is solved.

The invention discloses a welding forming device suitable for an I-shaped component, and belongs to the technical field of welding forming, and the welding forming device comprises a workbench which is provided with a pressing and holding unit used for pressing a horizontal flange plate downwards and a welding unit used for welding; the portal frame is provided with at least one gripper unit, and the gripper units are used for clamping and fixing the vertical web plates and the horizontal flange plates; the portal frame is provided with a driving unit used for driving the gripper unit to move in multiple directions. According to the scheme, the workbench, the portal frame, the pressing and holding unit, the welding unit, the gripper unit and the driving unit are integrated to form an integrated welding system, the forming process that a vertical web and two horizontal flange plates form a T shape and an I shape is formed, disassembly equipment and additional auxiliary equipment are not needed, the operation process is simplified, and the welding continuity is improved; manual step-by-step operation is not needed, the labor intensity is greatly reduced, and the welding efficiency and the welding quality are improved.

The invention discloses a composite material forming defect closed-loop correction method and system based on digital twinning, and the method comprises the steps: collecting material characteristic data, equipment operation parameters and real-time sensing data in a composite material forming process, and generating a composite material digital twinning body capable of reflecting a forming state in real time; generating a correlation map of defect types and influence factors based on a dynamic process of composite material digital twinborn re-forming; according to the association map, calling a process optimization module of the digital twin, and generating a process parameter correction scheme for specific defects; and the process parameter correction scheme is issued to forming equipment to be executed, corrected forming quality data is collected and fed back to the composite material digital twin, the defect elimination effect is verified, the physical-digital mapping relation of the twin is updated, and a closed-loop correction mechanism of the composite material forming defects is formed. By utilizing the embodiment of the invention, the forming defects can be efficiently eliminated, the quality consistency of composite material products is improved, and the production efficiency is improved.

The invention relates to a continuous punch forming process for a workpiece with a superfine connecting structure, which comprises the following steps of: punching a positioning hole, cutting the hole for the first time, cutting the hole for the second time, pre-cutting, accurately cutting, bending a peninsula part, removing connecting ribs and blanking, each process connecting rib is located between the small waste block and the adjacent middle waste block, the first thin strip is connected with the hanging island part, the two process connecting ribs are cut off in the connecting rib removing step, and the hanging island part is connected with the peninsula part only through the Y-shaped part. According to the method, the two-side connection relation between the material of the hanging island part and the material of the outer frame is kept, and after the waste materials in the strip-shaped area are completely discharged, the connection is disconnected, so that the hole precision is ensured; the process connecting rib structure is used for providing temporary mechanical support for the hanging island part in the stamping process, so that the position of the hanging island part is kept stable in the hollowed-out hole cutting and peninsula part bending stages, the situation that thin strips are broken due to uneven stress is avoided, and the product rejection rate is remarkably reduced.

The invention relates to the technical field of filter materials, and discloses a spunlace high-flux filter bag with a gradient aperture structure and a forming process thereof, the spunlace high-flux filter bag comprises a surface layer, a middle layer and a bottom layer which are respectively formed by 0.8 dtex polyester fiber, 1.5 dtex polyester fiber and 3.0 dtex polyester fiber, and a three-dimensional gradient structure with the aperture being 8 microns, 25 microns and 60 microns in sequence is formed through three-step gradient spunlace treatment. The filter bag does not need an adhesive, integration is achieved through mechanical entanglement of fibers, pollutants are intercepted step by step in the thickness direction, and blocking is effectively delayed. The initial flux is greater than or equal to 850L / (m < 2 >. H) under 0.1 MPa, the rejection rate of 5-micron particles is greater than 99%, and the time for attenuating the flux to 50% is prolonged by 2.3 times or more compared with that of a traditional filter bag.

The invention provides a multi-element material integrated compression molding component manufacturing method and a product. The product is composed of a plurality of embedded reinforcing skeleton spare parts, an integrated carbon fiber first side plate and an integrated or split type second side plate. Wherein the embedded reinforcing skeleton spare parts are manufactured by adopting a hot gas bulging forming process; the embedded reinforcing skeleton spare parts are connected and assembled through welding to form a reinforcing inner skeleton sub-assembly; the integrated carbon fiber first side plate is matched with the reinforced inner framework sub-assembly in shape, and the integrated carbon fiber first side plate and the reinforced inner framework sub-assembly are combined to form a composite forming sub-assembly through a mold pressing process; and the second side plate and the composite molding sub-assembly are combined to form a product assembly structure.

The invention provides a high-quality machining method for a small hole with a large depth-diameter ratio and nearly zero taper. Comprising the following steps: firstly, processing a conical bottom hole by using a femtosecond laser rotary cutting processing method, calculating the conicity of the bottom hole, selecting a proper light knife, calculating laser flux distribution on a flux line in a hole radius direction, determining a forming process of an ablation curve when an inclined laser beam irradiates an inclined hole wall of the bottom hole, and establishing an ablation curve prediction model; according to the hole diameter and the hole depth, proper machining parameters are selected, and the small hole with the large depth-diameter ratio and nearly zero taper is machined. In order to solve the problem that the taper is difficult to eliminate in the machining process of the large-depth-diameter-ratio small hole of the difficult-to-machine material, based on the femtosecond laser rotary cutting machining technology, the taper area material of the taper hole is eliminated by regulating and controlling the inclined light beam, the nearly-zero-taper formed hole is machined, the hole wall quality after femtosecond laser cold machining is high, and the machining precision is high. Theoretical and technical supports are provided for high-quality machining of large-depth-diameter-ratio nearly-zero-taper small holes of materials difficult to machine.

The invention discloses a packaging box special for medical treatment, and relates to the field of packaging boxes for medical treatment. The plant fiber composite material is prepared from the following raw materials in parts by weight: 80-95 parts of plant fiber slurry, 3-10 parts of chitosan, 5-15 parts of polylactic acid, 1-5 parts of nano silicon dioxide, 0.5-3 parts of an environment-friendly water repellent agent, 2-8 parts of reinforced fibers, 3-8 parts of a reversible moisture absorption phase change material and 0.1-0.5 part of a degradation indicating pigment. The plant fiber slurry is adopted as a bio-based framework, chitosan microfibers, polylactic acid, nano silicon dioxide, a reversible moisture absorption phase change material and other functional components are innovatively introduced, and an antibacterial trigger layer and degradation indication pigment on the inner surface are matched, so that the packaging box keeps good mechanical strength and structural stability, and meanwhile the packaging box has the advantages that the packaging box is not prone to deformation, and the service life is prolonged. And multiple functions of active on-demand antibiosis, dynamic humidity adjustment, visual degradation tracking and full bio-based degradability are achieved.

The embodiment of the invention relates to the technical field of visual feedback, and provides a self-adaptive visual feedback system and method for ensuring material forming quality, the system comprises a front-end framework and a rear-end framework which work cooperatively, the front-end framework comprises a sensing module, a feature extraction module, an error compensation module and an execution control module, the back-end architecture comprises a decision module, a twin simulation module and an evolution module; the system further comprises a quality analysis module. According to the embodiment of the invention, environmental interference is overcome through active vision and event camera collaborative perception, long-term precision is maintained through online calibration compensation, quality quantitative evaluation is realized by combining three-dimensional shape real-time reconstruction and a deep learning method, a digital twin technology is introduced to carry out strategy security verification, and continuous evolution of the system is realized by means of a federated learning architecture. The method is not only suitable for the welding process, but also can effectively meet the high-quality control requirements of various material forming processes such as spraying, cladding and surfacing.

The invention relates to the technical field of plastic forming, and discloses a plastic leftover material forming process of a layered compaction structure, which comprises the following steps: S1, raw material pretreatment: selecting a new plastic material meeting performance requirements, drying, mixing with pretreated recycled material particles in proportion, uniformly stirring, and feeding into a raw material storage tank for later use; s2, melting and injection molding: feeding the mixed raw materials into an injection molding machine, heating in different areas through a charging barrel, and stirring and melting into a melt through a screw rod; the die set is arranged, through an immediate leftover material separation and recovery system, the cut leftover materials can be rapidly recycled, soil and water pollution caused by leftover material accumulation is avoided, meanwhile, waste of plastic raw materials is reduced, and the development concepts of green manufacturing and circular economy are met. Due to the sealing protection design of the die set, pollution caused by melt leakage is avoided, and diffusion of dust and harmful gas is reduced through the sealing structure of the movable groove.

The present application relates to the technical field of material forming prediction, in particular to a real-time regulation and early warning method in a composite material forming process, comprising acquisition of unstable production composite material morphology images and determination of corresponding processes, analysis of process factors corresponding to each unstable production result by using a grey correlation analysis method, establishment of an early warning model based on a large amount of data, real-time acquisition and analysis of the morphology in actual production, and repeated adjustment of the corresponding process when abnormal production occurs. The model can automatically identify unstable production conditions in the composite material forming process, quickly locate the problem source according to the weight of the process factors, provide early warning information, so as to timely adjust the production parameters and ensure stable production of the composite material.

The utility model relates to the technical field of high polymer material forming processing, and discloses a foam microcellular foaming forming device based on supercritical fluid, which comprises a mixing box, a discharge valve, a placing cylinder, an L-shaped frame and a driver, an adjusting mechanism is arranged on the mixing box, an auxiliary mechanism is arranged on the adjusting mechanism, the adjusting mechanism comprises a rotary column, and the rotary column is arranged on the placing cylinder. A sliding plate is fixedly connected to the rotating column, a concave-convex opening is formed in the outer wall of the top of the containing barrel, a telescopic spring is fixedly connected to the outer wall of the bottom of the containing barrel, a compression spring is fixedly connected to the inner wall of the bottom of the sliding plate, and a scraping plate is slidably connected to the inner wall of the bottom of the sliding plate; the outer wall of the side, close to the compression spring, of the scraper is fixedly connected with a stirring rod. According to the utility model, the sliding plate and other structures are arranged, so that the problem that the quality of a final product is influenced due to the fact that a molten raw material and a mixture are not fully and uniformly stirred when supercritical fluid is mixed in a special plasticizing device is solved.

The invention relates to the technical field of injection molding, and provides an environment-friendly silicon plastic product rapid injection molding device which comprises an injection molding machine frame, a partition frame and an injection barrel, raw material extrusion equipment is arranged on one side of the injection molding machine frame, the partition frame is fixedly connected to the middle of the injection molding machine frame, and the partition frame is divided into a plurality of mounting cavities; a fixed mold and a movable mold are arranged in each mounting cavity, the movable molds slide in the mounting cavities, the material injection barrel communicates with the output end of the raw material extrusion equipment, a plurality of raw material discharge channels communicate with the circumference of the side wall of the material injection barrel, and the raw material discharge channels communicate with the corresponding fixed molds; by means of the technical scheme, the injection molding machine solves the problem that in the injection molding process of the silicon plastic raw materials through an injection molding machine in the prior art, after the silicon plastic raw materials are cooled, formed and taken out, the next round of injection molding operation can be conducted again.

The invention discloses a real-time closed-loop regulation and control method and system for the forming process of a stainless steel welded pipe. The method comprises the steps that multi-source heterogeneous data including a pipe shape image, a laser ranging sequence, temperature field distribution and roller pressure time sequence data in the forming process are synchronously collected through a distributed multi-source sensor network; performing space-time alignment and feature level fusion on the multi-source heterogeneous data, and constructing a multi-dimensional dynamic digital twinborn body in the forming process; on the basis of the multi-dimensional dynamic digital twins, an online rolling prediction model is adopted to deduce the development trend of weld forming quality and pipe diameter size deviation in real time; and according to the development trend, a cooperative regulation and control instruction set of the roller gap and the welding power is generated through a self-adaptive fuzzy inference system. By means of the embodiment of the invention, multivariable look-ahead perception and intelligent collaborative closed-loop regulation and control of technological parameters in the stainless steel welded pipe forming process can be achieved, and the stability and consistency of the forming quality are improved.

Provided are a high-strength and high-plasticity hot-forming steel with oxidation resistance for automobiles and a hot-forming process thereof, and the hot-forming steel has chemical compositions in mass percentages as follows: C: 0.35%-50%, Si: ≤0.20%, Mn: 1.50%-2.50%, P: 0.050%-0.10%, S≤0.004%, Als: 0.02%-0.06%, Nb: 0.03%-0.07%, Ti: 0.020%-0.050%, V: 0.08%-0.15%, Cr: 1.50%-3.20%, Mo: 0.10%-0.30%, B: ≤0.0040%, N≤0.005%, the balance Fe and inevitable impurities. The hot-forming steel provided in the present invention has high oxidation resistance, high strength and plasticity, does not need atmosphere protection during hot forming, and does not need shot blasting treatment after hot forming.