554 results about "Mechanical engineering technology" patented technology

The invention relates to the technical field of mechanical engineering, in particular to a three-dimensional simulation design method and system based on an elevator structure. The method comprises the following steps that an elevator structure drawing is obtained; a three-dimensional elevator assembly is constructed according to the elevator structure drawing; lift car static load simulation is conducted according to the three-dimensional elevator assembly, and lift car static load data are obtained; detecting the structural strength of the lift car based on the lift car static load data; evaluating welding defects based on the structural strength of the lift car, and generating welding defect data; identifying a weld weak area according to the welding defect data; determining the abrasion loss of the car structure based on the weld weak area; according to the lift car structure abrasion loss, the lift car bottom plate fracture risk is predicted; carrying out welding optimization design based on the fracture risk of the bottom plate of the lift car to obtain welding optimization design data; and traction and traction simulation is conducted according to the three-dimensional elevator assembly, and traction and traction data are obtained. Based on the mechanical engineering technology, the safety and stability of the elevator structure are improved, and the design precision and efficiency are remarkably improved.

The invention discloses a TBM cutterhead blockage early warning system based on distributed temperature measurement, and belongs to the technical field of mechanical engineering, a multi-modal data fusion unit comprises an integrated multi-source sensor module and a data fusion analysis module, the integrated multi-source sensor module adopts a bionic cobweb topological structure to arrange a flexible fiber grating sensor, and the data fusion analysis module adopts a data fusion analysis module to analyze the flexible fiber grating sensor. The data fusion analysis module carries out fusion processing on multi-source data through a machine learning algorithm and constructs a multi-modal data input layer, and the data fusion analysis module also designs dynamic weight distribution through a process scheduling algorithm. A bionic cobweb topological structure is adopted to arrange the flexible fiber grating sensor, the strain self-compensation characteristic of the flexible fiber grating sensor is utilized to adapt to cutterhead deformation, a machine learning algorithm is utilized to fuse multi-source data, a multi-modal data input layer is constructed, dynamic weight distribution is achieved through a process scheduling algorithm, and the cutterhead deformation detection accuracy is improved. The problem of data islands of a traditional single sensor system is solved, and the monitoring precision and adaptability are improved.

The invention relates to the technical field of ocean engineering and mechanical engineering, in particular to a method and a device for analyzing crack propagation of a fan blade considering a real ocean environment. According to the method, the real marine environment working condition is considered, dynamic simulation analysis is conducted on the fan blade, distribution information of loads borne by the fan blade is determined and loaded on a finite element model of the fan blade, a fatigue hot spot area is determined according to a finite element fatigue damage analysis result, and crack arrangement is conducted. And calculating a stress intensity factor of a crack tip and performing crack propagation simulation according to a finite element analogue simulation result so as to evaluate the fracture damage risk of the fan blade in a real marine environment. The wind turbine blade crack propagation analysis thought under the complex stress condition is provided, equipment faults and risks caused by blade breakage can be prevented, a scientific basis is provided for overhaul and operation and maintenance of a wind turbine, and therefore economic losses caused by failure of the wind turbine blade are reduced.

The invention discloses an air flotation vacuum pump performance prediction system based on a specific calculation model, and relates to the technical field of mechanical engineering. Comprising a multi-parameter fluctuation sensing module, a weak feature sensitive extraction module, an abnormal coupling atlas construction module, an instability precursor identification module, a prediction model regulation and control module and a model adaptive optimization module, and carrying out fusion in a preset time window, constructing a multi-parameter synchronous fluctuation sensing model, and outputting a synchronous anomaly index. By introducing multi-parameter synchronous fluctuation perception, weak feature extraction and an abnormal coupling map, accurate identification and early warning of the early instability trend of the air floating vacuum pump are realized, and an intelligent system with real-time perception and closed-loop prediction capabilities is constructed by combining model regulation and control and a self-adaptive optimization mechanism, so that the operation safety and stability are improved.

The invention provides a prediction method for the remaining service life of a rolling bearing based on transfer learning, and belongs to the technical field of artificial intelligence and mechanical engineering. Rolling bearing vibration signals are obtained, and a data set is constructed and divided into a source domain and a target domain; constructing a prediction model of the remaining service life of the rolling bearing; the model comprises the following steps: obtaining low-dimensional features and model weights by using a coding layer; the coding layer comprises a multi-head self-attention sub-layer used for obtaining a relationship between features and a model weight; the feedforward mechanism is used for obtaining low-dimensional mapping; predicting the residual life of the bearing by using the feature representation output by the last coding layer through the full connection layer; training the prediction model of the remaining service life of the rolling bearing: calculating the difference between a source domain and a target domain by using the data set, and constructing a loss item; weight parameters are added to the loss item, the weight parameters and the root-mean-square error loss item are added for back propagation, and the model weight is updated. And the generalization ability of predicting the bearing life by the model is improved.

The invention relates to the technical field of mechanical engineering, in particular to a multi-condition response speed reducer box variable density topological optimization method which comprises the following steps: S1, constructing a three-dimensional speed reducer box finite element model; s2, obtaining a plurality of stress distribution nephograms of the speed reducer box body; s3, carrying out topological optimization on the plurality of stress distribution nephograms; s4, the wall thickness of the speed reducer box body is adjusted, and the three-dimensional speed reducer box body finite element model is updated; and S5, verifying the updated finite element model of the three-dimensional speed reducer box body, determining that the speed reducer box body variable density topological optimization is successful when the verification is passed, and otherwise, repeating the step S3 and the step S4. According to the method, stress distribution under different installation modes and working conditions is considered, it is ensured that the design scheme can keep good performance in various environments, and meanwhile the design can better adapt to complex working conditions through the comprehensive stress distribution cloud atlas.

The invention discloses a hand-held drill based on spiral airflow chip removal, and relates to the technical field of mechanical engineering, the hand-held drill comprises a machine body and a first assembly mounted on the machine body, the first assembly comprises a positioning frame for assisting rapid disassembly and assembly, the outer ring of the positioning frame is fixedly connected with a wedging body A, and the upper end face of the vertical line of the positioning frame is fixedly connected with a clamping body; through the arrangement of the first assembly, the clamping groove is matched with the wedging body B in a sliding clamping mode, the quick connecting groove is matched with the wedging body A in a sliding clamping mode, quick mounting of the quick connecting frame and the machine body is achieved, and the structure can be flexibly mounted or dismounted according to actual requirements when facing different drilling operation scenes and materials; after the operation is finished, the assembly can be detached from the machine body for independent and thorough cleaning, so that the influence on the next use caused by residual chippings is avoided; and meanwhile, during storage, the disassembled components and the fuselage can be separately stored, so that the storage space is saved, and mutual collision and damage among the components can be avoided.

The invention relates to the technical field of mechanical engineering, in particular to a reciprocating type vertical lifting device.Two stand columns are fixedly connected to the top of a rail car, ejector rods are fixedly connected to the tops of the stand columns, a dynamic lifting mechanism is fixedly connected to the side faces of the stand columns, and a fixed side plate is arranged in the middle of the dynamic lifting mechanism; winding drums are arranged on the side faces of the two sides of the fixing side plate, a bearing mechanism is arranged in the middles of the two stand columns, a bearing table is arranged in the middle of the bearing mechanism, a balance mechanism is arranged at the bottom of the bearing mechanism, a balance base is arranged in the middle of the balance mechanism, and a balancing weight fixing base is arranged at the bottom of the balance base; a deceleration block is arranged on the side face of the balance mechanism, capsizing moment generated by goods deviation and position is counteracted, the deviation problem of the bearing mechanism is solved, friction between the bearing mechanism and the stand column guide rail is reduced, the stress of the root of the stand column is reduced, and the maintenance period is prolonged.

The invention discloses a self-adaptive parallel clamp and method suitable for a bush-disc test, and belongs to the technical field of mechanical engineering, the self-adaptive parallel clamp comprises a supporting mechanism, a parallelism adjusting mechanism is arranged in the supporting mechanism, the lower end of the supporting mechanism is connected with a clamping rod, the lower end of the clamping rod is provided with a sample clamping mechanism, and the sample clamping mechanism is provided with a clamping mechanism. And a movement mechanism is arranged at the lower end of the sample clamping mechanism. By adopting the self-adaptive parallel clamp suitable for the lining-disc test, the problem of parallelism error between the lining and the disc is solved, so that the horizontal load error and the friction force and friction coefficient measurement error caused by the error are reduced, and a more accurate surface-surface friction wear disc test is realized.

The invention provides a method for avoiding thread defects caused by mandrel-containing rotary swaging forming of a super-long pipe fitting, and belongs to the technical field of mechanical engineering. According to the method for avoiding the thread defect caused by the mandrel-containing rotary swaging forming of the super-long pipe fitting, the technological parameters such as the die finishing section length, the mandrel position, the circumferential feeding motion, the axial feeding motion and the die hammer forging frequency are cooperatively matched; defects of internal threads, external threads and internal and external threads during core-rod-containing rotary swaging manufacturing of the ultra-long pipe fitting are avoided, and the core-rod-containing rotary swaging quality of the ultra-long pipe fitting is guaranteed.

The invention belongs to the technical field of mechanical engineering, particularly relates to a self-adaptive grabbing mechanical arm, and provides the following scheme aiming at the problems that a clamping mechanism with a fixed shape is difficult to effectively fit an irregular outline of an object, so that the contact area of grabbing points is small, the stress is non-uniform, and the grabbing is unstable easily, the self-adaptive grabbing mechanical arm comprises a base; the rotating table is movably connected to the upper part of the base; the lifting hydraulic cylinder is fixedly connected to the upper end face of the rotating table; the main arm beam is fixedly connected to the driving end of the lifting hydraulic cylinder; and the sliding seat slides on the main arm beam. According to the self-adaptive grabbing mechanical arm, through the self-adaptive grabbing module, the self-adaptive grabbing mechanical arm can be bent in a self-adaptive mode to be attached to object contours of different shapes and sizes, a grabbed object is tightly wrapped in cooperation with the clamping air bag piece which is inflated and expanded, and flexible and stable grabbing of a target object with the complex outer surface is achieved; and the grabbing adaptability and convenience are remarkably improved.

The invention relates to the technical field of port cranes and mechanical engineering, in particular to a crane structure fatigue life prediction method and system. The invention provides a crane structure fatigue life prediction method. The crane structure fatigue life prediction method comprises the steps that a finite element model of a crane structure is established, and a stress-load mapping relation matrix of crane structure nodes is generated through dimension reduction processing; collecting actual working data of the crane structure; performing data processing on the actual working data, and constructing an actual working load spectrum; based on the stress-load mapping relation matrix and the actual operation load spectrum, generating a stress-time history used for calculating the fatigue life structure node of the crane; and calculating the fatigue damage of the crane structure and predicting the residual fatigue life by combining a stress-life curve and an accumulative damage theory of a crane structure material. According to the method provided by the invention, online, real-time and accurate prediction and visualization of the fatigue life of all structures of the crane are realized, and a basis is provided for formulating an accurate operation and maintenance plan.

The invention discloses an automatic adjusting core repairing device, system and method, and relates to the technical field of mechanical engineering, the automatic adjusting core repairing device is connected to a mechanical arm, and comprises a base body connected to the mechanical arm; the electric control mechanism comprises a driving assembly and a telescopic piece; the driving assembly is connected to the base body; the telescopic piece can do telescopic motion relative to the base body through a driving assembly; the rotating mechanism comprises a guide column and a rotating disc; the guide column is rotationally connected to the base body; the rotating disc is provided with a guide part connected with the guide column and a hinge part hinged to the telescopic piece. The telescopic piece is driven by a driving assembly to do linear reciprocating motion so as to drive the rotating disc to rotate relative to the base body; the core repairing mechanism comprises a core repairing rod connected to the rotating disc, and the core repairing rod is driven by the rotating disc to rotate by a preset angle so as to scrape off fins of the sand core; the core repairing rod can be driven to rotate by a preset angle, and fins at different positions can be scraped.

The invention relates to the technical field of mechanical engineering, in particular to an impeller and a sealing device for preventing particulate matter clamping stagnation. The impeller comprises an impeller body, scrapers are arranged on the outer ring of the front end of the impeller body and / or the outer ring of the rear end of the impeller body, the inner ends of the scrapers are fixedly connected with the impeller body, and the outer ends of the scrapers are exposed out of the outer ring of the impeller body. A scraper is arranged on the impeller body, a particle containing groove is formed in one side of the scraper, the particle containing groove is fixedly formed in the impeller body, and the width of the portion, exposed out of the outer ring of the impeller body, of the outer end of the scraper ranges from 0.2 mm to 0.5 mm. The sealing device for preventing particulate matter clamping stagnation comprises a pump body, a pump shaft, a pump cover, a front sealing ring and a rear sealing ring, the impeller is arranged on the pump shaft, and the rear sealing ring is arranged on the pump shaft. According to the centrifugal pump, the structure is ingenious, particulate matter on the sealing rings can be scraped off, the impeller rotates smoothly, the sealing performance is good, and the operation reliability is high.

The invention relates to a quasi-static straight gear wear numerical analysis method, and belongs to the technical field of mechanical engineering. The method comprises the following steps: calculating a dynamic wear coefficient by using a mixed lubrication model; the contact pressure and the sliding distance are calculated in an integral form, a straight gear quasi-static numerical wear model is established by using matlab software with the help of an Archard formula, and a wear value is calculated; the influence rule of the modulus, the torque and the tooth width on the abrasion loss is obtained, and meanwhile the significance of the influence of the three factors is analyzed through an orthogonal experiment method. Compared with the prior art, the method has the advantages that the problem that the calculation of the contact pressure is greatly influenced by the grid units is researched and solved, so that the obtained contact pressure value is more accurate, and the tooth surface wear is reduced according to the rule and significance analysis of the influence of various factors.

The utility model discloses a boiler maintenance auxiliary device, and belongs to the technical field of mechanical engineering. The maintenance device is provided with a maintenance platform, and the maintenance platform comprises a protection part which is used for protecting workers on the maintenance platform; the lifting mechanism is used for adjusting the height of the maintenance platform; the box placing table is used for placing a tool box of an operator; the adjusting mechanism is arranged at one end of the box placing table, the adjusting mechanism is used for adjusting the position of the box placing table, and the adjusting mechanism is provided with a supporting plate which is fixed on the protection part; the lead screw is rotationally connected to the supporting plate; the nut is connected to the end face, close to the lead screw, of the box containing table, and the nut is in threaded connection with the lead screw. And the fixing mechanism is used for fixing the position of the box placing table. According to the boiler overhaul auxiliary device, the box containing table is arranged, and therefore an operator can conveniently take and replace tools.

The invention relates to the technical field of mechanical engineering, and discloses a rotary table accurate alignment control method based on multi-modal sensing fusion, which comprises the following steps: firstly, acquiring multi-modal sensing data of a target rotary table, fusing the multi-modal sensing data into a multi-modal vector, and identifying a real-time pose; calculating a deviation value between a current position and a target position, determining a control stage, and constructing a hierarchical control process; then extracting control positioning data in the process, dividing to obtain an adjustment sequence, and generating a turntable servo motor driving instruction; then, a high-frequency disturbance value during instruction execution is collected, an anti-disturbance control quantity is calculated, and a precision unbalance point is detected; and finally, identifying the precision deviation value of the unbalance point, carrying out cooperative alignment with a preset precision index to obtain a parameter group, and generating an alignment control strategy. According to the invention, the control precision and the adaptive capability of the rotary table in a complex application environment can be improved.

The invention discloses a laser cutting clamping device, and relates to the technical field of mechanical engineering, the laser cutting clamping device comprises a table plate, the top of the table plate is slidably provided with a laser support, the inner wall of the laser support is rotatably provided with a telescopic laser head, and the surface of the table plate is provided with a lifting turnover device; the turnover device comprises a U-shaped lifting rod, a first motor, a lead screw, a lantern ring, a second motor, a fixing frame, a slope protruding block, an L-shaped push rod, a round plate, a sliding clamping plate, a short round rod, a U-shaped push rod, a hollow round plate, a fixed clamping plate, a short telescopic rod, an L-shaped limiting rod and a sliding limiting rod, a square groove is formed in the surface of the table plate, and the U-shaped lifting rod is slidably installed on the inner wall of the square groove. The fixed clamping plate rotates to drive the plate to rotate, the U-shaped push rod is stressed to lift the plate when the plate rotates to 180 degrees, and the situation that the large-thickness plate falls off in the overturning process due to the fact that the large-thickness plate is too heavy is avoided.

The invention discloses a laser cutting machine for carpet cutting, and relates to the technical field of mechanical engineering, and the laser cutting machine comprises a laser cutting machine body; the outer wall of the sliding rail is fixedly connected with the inner wall of the laser cutting machine body; the bottom of the sliding assembly is in sliding connection with the inner wall of the sliding rail; the outer wall of the positioning assembly is in sliding connection with the inner wall of the sliding assembly; the top of the transmission assembly is used for being fixedly connected with the inner wall of the laser cutting machine body; according to the carpet cutting device, by arranging the sliding assembly, in the carpet cutting process, an operator can move the sliding frame to different positions according to needs so that different parts of a carpet can be cut, the top of the sliding frame is fixedly connected with the working frame, and the cutting operation flexibility of the carpet cutting device at different positions is achieved; and the requirements for large carpet cutting and specific area fine cutting can be met, and the applicability of the equipment is improved.

The invention relates to the technical field of mechanical engineering, in particular to a chassis rotary table for aloft work. The device comprises a mounting seat, a supporting seat is fixedly mounted in the mounting seat, an annular groove A is formed in the inner wall of the supporting seat, an annular groove B is formed in the position, above the annular groove A, of the inner wall of the supporting seat, a rotating frame is rotationally connected to the inner wall of the annular groove A, and a friction ring is arranged on the inner side of the rotating frame; a gear ring is fixedly mounted on the upper surface of the rotating frame, a connecting seat is fixedly mounted on the upper surface of the gear ring, a mounting frame is arranged in the mounting seat below the connecting seat, and an oil storage barrel is fixedly mounted on the upper surface of the mounting frame; when the rotating parts work, the friction force between the rotating parts is increased, then the oil injection and lubrication work between the rotating parts is automatically completed, the abrasion acceleration of the parts caused by the fact that oil injection and lubrication cannot be conducted in time is reduced, frequent manual inspection and oil injection operation are omitted, and labor and time cost is saved.

The invention relates to an active pre-tightening type safety belt performance test system and method based on dual modes, and belongs to the technical field of mechanical engineering. A test trolley receives an input whole-process acceleration waveform under the dual modes of emergency braking and rear-end collision and then starts an active pre-tightening type safety belt performance test; triggering a pre-tightening signal to start an active pre-tightening motor controller to pre-tighten and pull back the safety belt, and accelerating the test trolley to a collision position according to the acceleration waveform in the emergency braking stage of the acceleration waveform of the whole process, and then the deceleration waveform generator performs deceleration braking on the trolley according to the acceleration waveform in the rear-end collision stage in the whole-process acceleration waveform, and the data acquisition analyzer acquires data of a plurality of sensors in the sensor network in the test process in real time to generate a test result. According to the technical scheme, the requirement for bidirectional change of the acceleration of the trolley under the emergency braking rear-end collision working condition can be met, and the test requirements of different vehicle types are met.

The invention is suitable for the technical field of mechanical engineering, and provides a mechanical gap prediction method, device and system and a medium, and the method comprises the steps: obtaining a first mechanical gap value of mechanical equipment, and obtaining operation data and environment data when the mechanical equipment works; wherein the first mechanical clearance value is obtained through measurement when the mechanical equipment works under the standard condition; predicting a second mechanical gap value of the mechanical equipment through a pre-trained prediction model according to the operation data and the environment data; constructing a mechanical parameter calculation function according to the operation data, and adjusting the first mechanical gap value according to the mechanical parameter calculation function to obtain a third mechanical gap value; and performing weighted fusion on the first mechanical gap value, the second mechanical gap value and the third mechanical gap value to obtain a mechanical gap value of the mechanical equipment. According to the method, the mechanical gap of the mechanical equipment in the automatic calibration system of the inductive linear displacement sensor can be predicted in real time, and the prediction accuracy is improved.

The utility model discloses a photovoltaic cell transfer device, which relates to the technical field of mechanical engineering, and comprises a transfer platform, an adjusting and fixing mechanism, a moving mechanism, a supporting mechanism, a damping mechanism and a pushing mechanism, the adjusting and fixing mechanism comprises a first electric telescopic rod, a connecting block, a second electric telescopic rod, a fixing plate and an elastic cushion, the first electric telescopic rods are fixedly installed on the front face and the back face of the top of the transfer platform, and the connecting blocks are fixedly installed on the tops of the first electric telescopic rods. According to the photovoltaic battery piece transfer device, by arranging the adjusting and fixing mechanism, the function of fixing photovoltaic battery pieces with different specifications and sizes in the use process of the device can be effectively achieved, it is ensured that the battery pieces can be firmly fixed in the transfer process, the battery pieces are prevented from moving or shaking in the transfer process, and the transfer efficiency of the photovoltaic battery pieces is improved. And meanwhile, the battery piece can be effectively prevented from colliding with the device.

The invention relates to a quick connector and a production mold thereof, and relates to the technical field of mechanical engineering, and the quick connector comprises a first pipeline, a second pipeline and a connecting shell made of an engineering plastic material. The corrosion resistance is improved through the connecting shell made of the engineering plastic, the connecting shell is made of the engineering plastic, a metal hoop in the prior art is replaced, and the problem of metal corrosion is solved from the material level. The hoop directly wraps the connecting end of a pipeline, does not need to be exposed to the external environment, can resist erosion of water vapor and corrosive media for a long time, ensures the stability of a connecting structure, and solves the problems of clamping force attenuation and leakage hidden danger caused by corrosion of a traditional metal hoop. Tool-free rapid operation is achieved through the limiting mechanism, and through the synergistic effect of a limiting sliding rod, a first spring and a first ball, when the connecting shell is pulled upwards, constraint of an annular limiting hole to the first ball is relieved, the first spring rebounds to drive the limiting sliding rod to be away from the second pipeline, and pipeline insertion is facilitated.

A large component hydraulic turnover mechanism and a control system thereof relate to the technical field of mechanical engineering, and comprise a mounting platform, the top of the mounting platform is connected with a mounting frame, the two sides of the mounting frame are connected with a plurality of groups of fixed clamping blocks, and the inner walls of the fixed clamping blocks are rotatably connected with connecting blocks; the tops of the connecting blocks on the two sides are connected with a first overturning plate and a second overturning plate correspondingly. Through the arrangement of the first overturning plate, the second overturning plate, the buffer spring, the damping rod and the lap joint plate, during use, the buffer spring effectively absorbs impact force and vibration in the overturning process, the overturning stability and safety are improved, the damping rod plays a role in buffering and stabilizing, a pressure sensor is further arranged on the inner wall of the damping rod, and therefore the stability and safety of overturning are improved. The pressure change in the overturning process can be monitored in real time, accurate data support is provided for a control system, the buffer spring and the damping rod can receive pressure synchronously through the lap joint plate, and pressure monitoring is facilitated.

The invention discloses a shafting vibration characteristic analysis method and system based on elastohydrodynamic lubrication, and relates to the technical field of mechanical engineering.The method comprises the steps that the entrainment speed, the time-varying curvature radius and the contact load at a contact point in a gas distribution-oil supply cam pair are determined; respectively inputting the entrainment speed, the time-varying curvature radius and the contact load at the contact point into a friction analysis model in an elastohydrodynamic lubrication state, and calculating a time-varying curve of the total interfacial friction force of the gas distribution-oil supply cam pair in the whole working cycle; based on time-varying friction excitation corresponding to any moment in the change curve, determining a system excitation vector of the gas distribution-oil supply cam pair by using interface friction as a key connection quantity through experimental testing and simulation modeling technologies; according to the system excitation vector and the structure parameters of the camshaft system, establishing a camshaft system torsional vibration characteristic coupling analysis model considering the interface elastohydrodynamic state; and solving the shaft system torsional vibration differential equation set to obtain the influence rule of the time-varying friction on the instantaneous vibration characteristics of the camshaft system.

The invention belongs to the technical field of computer aided design and mechanical engineering, and relates to a parameterized three-dimensional automatic modeling and assembling system and method for a rolling bearing. The system comprises a parameter input module used for obtaining bearing design parameters; the part modeling module is used for generating an inner ring model, an outer ring model, a rolling body model and a retainer model which comprise preset assembly reference surfaces according to the parameters; the assembly logic module is used for automatically positioning the respective three-dimensional models of the multiple parts of the rolling bearing in a three-dimensional space and constructing a complete bearing assembly so as to generate a complete rolling bearing; and the auxiliary function module is used for providing model file management, modeling process visualization and data output functions. The method has the beneficial effects that the traditional dependence on a solid geometric surface is replaced by abstract association of the reference surface and the coordinate system, and high automation, stabilization and parameterization of the modeling and assembling process are realized.

The invention relates to an intelligent process design method and system for part machining, and belongs to the technical field of mechanical engineering, and the method comprises the steps: firstly preprocessing an MBD three-dimensional model of a part, and obtaining a feature view, PMI information and a process picture; a processing feature recognizer based on a deep neural network YOLOv5 is used to recognize processing features; extracting process information on the processing features according to a PMI information extraction method; matching processing feature processing elements in the process knowledge base through a comprehensive weighting algorithm; sorting the processing elements by adopting a processing element intelligent sorting and optimization algorithm to generate an optimal process route; other basic information of the process is collected in a man-machine interaction mode, and a process card is generated. According to the method, part machining feature recognition and intelligent process design are combined, so that design information and manufacturing information are communicated, the purpose of effectively utilizing a three-dimensional design model to carry out process design is achieved, meanwhile, a reasonable machining process route with high efficiency can be rapidly obtained, and the intelligence of the process design is improved.

The invention discloses a telescopic device deformation prediction and control system based on multi-modal fusion deep learning, and relates to the technical field of mechanical engineering. The system comprises a data acquisition module, a preprocessing module, a data fusion module, a deep learning prediction module, a control decision module and a feedback optimization module. The data acquisition module acquires multi-modal data by using a distributed sensor array; the preprocessing module processes the data to ensure the quality; the data fusion module fuses the data to generate comprehensive data; the deep learning prediction module outputs a predicted deformation value by means of an LSTM and CNN fusion architecture; the control decision module performs hierarchical control according to a comparison result of a predicted value and a safety threshold and comprises a fuzzy control unit optimization instruction; and the feedback optimization module optimizes model parameters and control strategies online by using a reinforcement learning algorithm, so that high-precision prediction and self-adaptive control of deformation of the telescopic device are realized, and the structural safety and the system intelligence level are improved.

The invention relates to the technical field of mechanical engineering, and discloses a special valve sealing element integrated machining process which comprises the following steps: S1, carrying out ultrasonic cleaning on a high-performance stainless steel or titanium alloy base material to remove oil stains and impurities on the surface; s2, performing one-time rough machining on the outer circle, the inner hole and the end face of the base material by using a five-axis numerical control lathe; s3, the multiple sealing elements are connected into a whole through TIG welding or high-strength epoxy resin bonding; s4, a numerical control grinding machine is adopted for conducting finish machining on the sealing face, and polishing liquid is matched with an automatic polishing machine to enable the surface roughness to meet the design requirement; an anti-corrosion coating is sprayed on the sealing surface according to use requirements; and S5, ultrapure water in a dust-free room environment is adopted for cleaning and drying, and then a pressure sealing test, a temperature resistance test and a corrosion resistance test are conducted. Through TIG welding, hot press molding and X-ray nondestructive testing, connection of multiple parts on the molecular level is achieved through the technology, and defects at joints are reduced.