77211results about How to "Reduce manufacturing cost" patented technology

The invention provides an automobile part spraying control method and system, and relates to the technical field of automobile manufacturing, and the method comprises the steps: collecting spraying environment parameters in real time, generating a comprehensive digital model containing the environment parameters and part characteristics, and carrying out the intelligent partitioning of the surface of an automobile part through a clustering partitioning algorithm, and dividing the surface into a plurality of sub-regions; on the basis of each sub-region, combining with the current environment parameters, generating an optimal spraying parameter for each sub-region by utilizing an intelligent agent trained by a reinforcement learning algorithm, and on the basis of the spatial relationship between the optimal spraying parameters and the sub-regions, optimizing a global spraying sequence by adopting an ant colony path planning algorithm, and generating an optimal spraying path; the spraying robot sprays, a real-time quality evaluation result of spraying is generated, a pre-constructed fuzzy logic controller is adopted, spraying parameters are adjusted, sprayed parts are obtained, a full-period comprehensive data set is integrated, and spraying control parameters are iteratively updated.

The invention provides a production scheduling calculation method of a production plan scheduling platform. The method comprises the steps of data collection, demand prediction intelligent analysis, productivity planning and bottleneck analysis, production scheduling plan making, real-time monitoring and dynamic adjustment, plan execution and feedback analysis and report generation and decision support. Through distributed scheduling and real-time dynamic adjustment, the production plan can respond to emergencies such as equipment failure and order change in production in time, the continuity and stability of the production process can be ensured, production stagnation or delay caused by the emergencies is avoided, meanwhile, the production scheduling plan can be rapidly adjusted through real-time data feedback, and the production efficiency is improved. Resource utilization is optimized, waste is reduced, production efficiency is improved, intelligent productivity analysis and bottleneck identification are utilized, an enterprise can comprehensively know the use condition of each production resource, and possible bottleneck problems are found and solved in advance.

The invention relates to an industrial robot cooperative control method, system and device and a storage medium. The method comprises the following steps: acquiring machine system information, working environment conditions, task demand contents and cooperative mode information of a plurality of industrial robots; performing spatial analysis on the working environment condition to obtain environment structure characteristics; performing task decomposition on the task demand content according to the cooperation mode information to obtain a sub-task list; mapping the machine system information into the environment structure features to obtain a corresponding mapping relationship, and performing association analysis on the mapping relationship to obtain a task allocation scheme; performing individual optimization on the comprehensive control parameters based on a task allocation scheme to obtain robot control parameters; and performing cooperative strategy analysis according to the sub-task list and the robot control parameters to obtain robot cooperative strategies, and performing comprehensive analysis on all the robot cooperative strategies to obtain an overall cooperative control strategy. According to the invention, the whole industrial robot system can be more suitable for complex and changeable actual production scenes.

The invention provides an electromagnetic field composite powder feeding type plasma arc additive manufacturing formability regulation and control method and system, and relates to the technical field of plasma arc additive manufacturing. The flowing direction and speed of liquid metal in a molten pool in the deposition process are regulated and controlled through the target composite electromagnetic field, and the morphology and the internal organization structure of a deposition layer are controlled; in the process of regulating and controlling the liquid metal in the molten pool, process parameters and molten pool dynamic image data in the deposition process are collected in real time, and a pre-trained state recognition model is used for conducting self-adaptive adjustment on the process parameters of a subsequent deposition layer; and after deposition of each layer is completed, a laser scanning system is adopted for measuring the actual geometric size and surface appearance of the deposition layer, deposition manufacturing of the next layer is executed based on the optimized composite electromagnetic field control parameters, the corrected layered slicing data and the process path, and the execution is executed circularly till manufacturing of the whole workpiece is completed.

The invention provides a textile woven structure anomaly detection method, which comprises the following steps: acquiring real-time tension monitoring data of warps and wefts in a jacquard textile weaving process, and establishing a tension distribution model in a normal weaving state according to the real-time tension monitoring data; if the classification result is in an abnormal state, spraying a pre-prepared chemical reagent on the surface of the abnormal position of the jacquard textile, and collecting spectral data of the surface of the textile after spraying; performing feature extraction and classification on the spectral data, and obtaining a comprehensive anomaly detection result by comparing a classification result with a tension position anomaly detection result; according to the comprehensive anomaly detection result, an abnormal area is accurately positioned and marked, and a sample in the abnormal area is cut and conveyed to a sample analysis device; and carrying out microstructure analysis on the cut sample, extracting fiber arrangement characteristics, judging the abnormal degree of fiber arrangement, and obtaining a microstructure abnormality evaluation result.

The invention provides an LED packaging material defect detection method, which comprises the following steps: performing image enhancement processing on each layer of separated image to obtain each layer of clear material image; carrying out local fine scanning on the identified cross defect area to obtain micron-sized three-dimensional structure data, and reconstructing fine morphology characteristics of the cross defect; according to the reconstructed cross flaw structure, combining various material performance parameters pre-stored in a material database to simulate and calculate the influence of flaws on the LED performance, including optical, thermal and mechanical properties; and judging the position, the size, the type and the influence degree on the performance of the flaws, and carrying out quantitative scoring on the overall quality of LED packaging to obtain a final detection result and quality grade judgment.

The invention belongs to the technical field of copper-clad plates, and relates to a low-dielectric high-heat-resistance copper-clad plate and a preparation method thereof. By introducing the POSS resin, the dielectric constant of the copper-clad plate is effectively reduced, which is crucial for reducing signal delay and improving signal transmission efficiency. The introduction of the POSS resin not only improves the dielectric properties of the material, but also improves the glass transition temperature (Tg) of the material, which means that the physical and chemical properties of the material can be kept unchanged at a higher temperature, and the material is suitable for wider environmental conditions. By using the resin and the inorganic filler in a specific ratio, the copper-clad plate shows excellent copper foil peel strength, and ensures that the bonding force between the copper foil and the base material is not easily weakened under long-term use or severe conditions. Meanwhile, the material also has excellent CAF (conductive anode wire) resistance, can effectively prevent internal short circuit caused by moisture, and prolongs the service life of an electronic product.

The invention relates to a coal mine fully-mechanized excavation face intelligent ventilation dust control and removal system based on an optimal coordination mechanism, and belongs to the technical field of coal mining. According to the system, through integrating a plurality of functional modules such as data processing, area control, optimal parameter calculation, execution control, safety guarantee and expert system evaluation, intelligent management of ventilation, dust control and dust removal is realized. The system adopts a method of combining fuzzy control and PID (Proportion Integration Differentiation) control, and automatically calculates and adjusts operation parameters of the air control device and the dust remover according to environmental parameters such as dust and gas concentration which are monitored in real time, so as to realize an optimal ventilation and dust control effect. Through training and prediction of a machine learning model, the system can autonomously learn and optimize technical parameters of a dust control and removal process, the adaptive capacity and the operation efficiency of the system are improved, the dust and gas concentration of a working face is effectively reduced, and health of workers and safe production are guaranteed. The invention aims to improve the environmental quality of the coal mine fully-mechanized excavation face and promote the intelligent development of the coal mine ventilation dust control and removal technology.

The invention relates to the technical field of yarn detection, and particularly discloses a yarn quality detection system, method and equipment. Shooting parameter information is adjusted based on yarn quality standards and external configuration information, and a high-speed camera corresponding to the shooting parameter information is used for collecting original image data of yarn in the production process in real time; processing the original image data to obtain yarn feature information, wherein the yarn feature information comprises yarn material, yarn color, yarn thickness, fiber uniformity, hairiness and knot faults; classifying defects on the surface of the yarn based on the yarn feature information to obtain yarn defect categories; and a defect abnormal area on the enhanced image is identified based on the yarn defect category, statistical analysis is performed on the defect abnormal area to generate a quality detection report, and the quality detection report is transmitted to the control module and the display alarm module.

The invention provides a material simulation test method and platform for mold flow analysis, and relates to the technical field of material simulation testing, and the method comprises the steps: carrying out the product demand analysis of a target test material, and obtaining the product demand information; performing injection molding analysis to obtain an injection molding control parameter threshold; obtaining an injection molding simulation test model; carrying out an injection molding simulation test, and carrying out image pre-acquisition to obtain a first pre-acquired image; defect feature analysis is carried out, attention area distribution is carried out, and a target attention area is obtained; an injection molding defect area image is obtained, and defect feature information is obtained; and feedback testing and parameter optimization are carried out, optimized injection molding control parameters are obtained, and injection molding control is carried out. The technical problems that in the prior art, injection molding analysis generally depends on a fixed mathematical model and limited technological parameters, and problems in the molding process cannot be recognized and adjusted in real time, so that the production efficiency and the product quality are low are solved.

The invention discloses construction and application of an engineering bacterium for co-expressing D-mannitol dehydrogenase and D-glucose dehydrogenase, and belongs to the technical field of genetic engineering. The technical problem to be solved by the invention is how to co-express D-mannitol dehydrogenase and D-glucose dehydrogenase through a biosynthetic pathway. In order to solve the technical problem, the invention provides recombinant escherichia coli. The recombinant escherichia coli is characterized by containing a D-mannitol dehydrogenase gene, a D-glucose dehydrogenase gene, a glucokinase gene, an acetyl coenzyme A synthetase gene, a D-lactose transporter gene, a D-glucose PTS permease-free gene and a pyruvate oxidase-free gene. And no regulator gene of galactose operon is contained. The invention establishes a preparation method for co-producing D-mannitol and sodium gluconate, which has guiding significance for the production of D-mannitol and sodium gluconate.

The invention discloses a back contact battery, a manufacturing method thereof and a photovoltaic module, relates to the technical field of photovoltaic, and aims to enable the back contact battery to have a relatively low hot spot risk and improve the working reliability of the back contact battery. And meanwhile, the back contact battery has relatively high working efficiency in a forward voltage region. A back contact cell includes a semiconductor substrate, a first doped semiconductor portion, a second doped semiconductor portion, and a transparent conductive layer. In the reverse electric leakage area, the part, extending into the overlapping area from the second area, of the transparent conductive layer is a first transparent conductive part, and the first transparent conductive part is electrically connected with the first doped semiconductor part through the second doped semiconductor part. The width of the first transparent conductive part in the first direction is W1, the width of the overlapping area in the first direction is W2, and the ratio of W1 to W2 is larger than or equal to 10% and smaller than or equal to 90%.

The invention relates to the technical field of part typesetting, in particular to a nesting typesetting mixed common-edge analysis method and system based on laser cutting. The method comprises the following steps: obtaining initial typesetting part structure data, and carrying out part common-edge relation analysis to obtain part common-edge relation data; common-edge path optimization is carried out according to the initially-typeset part structure data, and optimized part cutting path data is obtained; performing laser cutting simulation based on the optimized part cutting path data to obtain laser cutting simulation data; performing typesetting heating balance optimization according to the laser cutting simulation data so as to obtain optimized part typesetting data; and performing cutting waste rate evaluation on the optimized part typesetting data to obtain typesetting cutting waste rate data, and performing minimum cutting waste rate optimization on the optimized part typesetting data based on the typesetting cutting waste rate data to obtain optimal part typesetting data. The cutting efficiency and precision are improved.

The invention discloses a full-automatic laser welding forming system, which relates to the technical field of laser welding, and comprises a laser generation and light beam modulation module, a material conveying and positioning module, a welding execution module, a visual inspection and monitoring module, an intelligent self-adaptive control module and an energy recovery and reutilization module, the material module accurately conveys and positions materials; the welding module robot is accurate in operation; the visual module detects welding seams; the intelligent module performs self-adaptive control; the energy module recycles energy. The welding quality is improved, and defects are reduced; the production efficiency is improved and the cost is reduced; operation is simple, and manpower requirements are reduced; energy is saved, environment is protected, and green concept is met; real-time monitoring is achieved, and the product quality and the management level are guaranteed.

The invention discloses a pipe production task management method and system, and belongs to the technical field of pipe production, and in the pipe production task management method and system, factors such as order priority, equipment state and raw material supply are analyzed through an intelligent algorithm, and the production schedule is automatically optimized, so that production resources are utilized more reasonably and efficiently. Resource waste can be avoided, idle time in the production process is shortened, and therefore production efficiency and the productivity utilization rate are improved. The urgency degree and the delivery date of the order are analyzed through an intelligent algorithm, and the enterprise can preferentially arrange the production of the urgent order to ensure that the customer demand is met in time. Meanwhile, production tasks are reasonably distributed according to the running state of the equipment and the raw material supply condition, and the use efficiency of the equipment and the utilization rate of raw materials are improved. The dynamic adjustment mechanism monitors the production progress in real time and automatically adjusts the production plan according to the actual situation, so that the system can rapidly adjust the production plan and distribute the tasks to other devices, and continuity and on-time delivery of the production tasks are ensured.

The invention discloses light gray low-emissivity coated glass for near-zero energy consumption buildings and a preparation method thereof, the light gray low-emissivity coated glass comprises a glass substrate and a composite metal film layer laminated on the glass substrate, and is coated glass with three metal silver film layers. According to the invention, one of the multiple composite metal film layers on the common colorless transparent float glass substrate reflects and interferes with light, so that the coated glass is light gray in the sun and has good decoration and energy-saving effects; the hollow glass is high in visible light transmittance, low in outdoor visible light reflectivity, low in solar energy transmittance and high in solar energy reflectivity, and can be made into hollow glass to achieve better energy-saving effects such as light control, heat insulation and the like, so that a building is closer to the nature and is fused with the nature.

The embodiment of the invention provides a battery cell and electric equipment. The battery cell comprises a shell and an electrode assembly. The electrode assembly is accommodated in the shell; the electrode assembly comprises a first pole piece group, a second pole piece group, a first diaphragm and a plurality of second diaphragms. The first pole piece group comprises a plurality of first pole pieces which are stacked in the first direction; the first pole piece group and the second pole piece group are laminated along the first direction, the second pole piece group comprises a plurality of second pole pieces laminated along the first direction, and the length of the second pole piece group is greater than that of the first pole piece group along the second direction; the first diaphragm comprises a plurality of folding parts and at least one connecting part, the plurality of folding parts are arranged at intervals along a first direction, a first pole piece is arranged between two adjacent folding parts, and the connecting part is connected with the two adjacent folding parts; the plurality of second diaphragms are arranged at intervals along the first direction and are not connected, and one second pole piece is arranged between every two adjacent second diaphragms. According to the technical scheme provided by the invention, the safety performance of the battery cell can be improved.

The invention relates to a high-activity recombinant XVII type collagen as well as a rapid preparation method and application thereof, and belongs to the technical field of bioengineering. The amino acid sequence of the high-activity recombinant XVII type collagen is as shown in SEQ ID NO. 1, and the nucleotide sequence of the high-activity recombinant XVII type collagen is as shown in SEQ ID NO. 2. The invention also provides a preparation method and application of the recombinant XVII type collagen. The high-activity recombinant XVII type collagen has good biological activity, has good effects of promoting cell adhesion, cell proliferation and cell migration, and can be compounded with other proteins to form raw materials of tissue engineering products, cosmetics, health care products or medicines. The high-activity recombinant XVII type collagen gene is integrated to different positions of a yeast genome through three different vectors, and the copy number of a target gene is increased, so that the expression quantity of the recombinant XVII type collagen is remarkably increased, and the yield of the high-activity recombinant XVII type collagen is effectively increased.

The invention belongs to the technical field of biochemical engineering and the technical field of bioengineering, and discloses a schizochytrium limacinum engineering strain for producing EPA (eicosapentaenoic acid) by prolonging a desaturation path. Part or all of the extended desaturase genes from thraustochytrium sp. And fusarium sp. And saprolegnia are expressed. According to the invention, extended desaturase genes from various sources are integrated into a schizochytrium limacinum genome, so that a schizochytrium limacinum gene engineering strain efficiently expresses the extended desaturase genes, and a heterologous EPA synthesis path with high synthesis efficiency, short culture period, simple purification method and low cost is provided; a basis is provided for producing grease rich in EPA from schizochytrium limacinum, and the problems of non-sustainability, high cost and the like caused by obtaining EPA from fishes are solved.

The invention discloses a broad-spectrum antibacterial peptide SS-7 and application thereof, and belongs to the field of biological medicine. The amino acid sequence of the broad-spectrum antibacterial peptide SS-7 disclosed by the invention is VRRVRFVVLRRIKKWRRI, and the broad-spectrum antibacterial peptide SS-7 has a remarkable inhibition effect on various gram-positive bacteria and gram-negative bacteria such as drug-resistant strains such as methicillin-resistant staphylococcus aureus (ATCC43300) and shows low toxicity and no hemolytic toxicity on eukaryotic cells and red blood cells of mammals; lPS and lipoteichoic acid on the surfaces of bacteria can be combined to achieve the effect of neutralizing the bacteria, and a very good treatment and protection effect is achieved on animals infected by the bacteria. The antibacterial peptide SS-7 can be used for preparing an antibacterial agent and preparing a medicine for preventing or treating bacterial infection, has the advantages of being wide in antibacterial spectrum, low in drug-resistant mutation frequency, low in toxicity and low in production cost, can effectively solve the current bacterial drug resistance problem, and has wide application prospects and important clinical value.

The invention relates to a part burr removing technology, in particular to an intelligent control system for removing burrs of machined parts, which is used for solving the problems that manual burr removing operation is poor in stability, parts are easy to damage, part of hidden burrs are difficult to perceive and remove, and the burr removing efficiency is low. Automation of the burr removing process is achieved through a plurality of modules arranged in the program controller, manual intervention is reduced, the production efficiency is improved, the path planning module conducts optimal planning on a burr treatment path according to a burr detection result, the efficiency and effect of burr removing work are improved, and the labor intensity of workers is lowered. The real-time monitoring module can monitor the working state of the deburring tool in real time, it is ensured that the deburring tool operates according to the optimal path, whether the deburring tool can continue to execute deburring work or not can be judged in real time, the whole control system is intelligently controlled through a program, dependence on manual deburring operation is reduced, the production cost is reduced, and the working efficiency is improved. And the safety risk possibly existing when the burrs are manually removed is avoided.

The invention relates to the technical field of wire harness production, and particularly discloses an intelligent monitoring management system for a wire harness production line. Comprising a wiring harness terminal crimping process database module, a wiring harness terminal crimping text data acquisition module, a wiring harness terminal shape text data processing module, a wiring harness terminal pressure text data processing module, a wiring harness terminal crimping process analysis module and an error correction analysis adjustment module. A wire harness terminal crimping management judgment module; and a wire harness terminal crimping man-machine interaction module. According to the invention, text data acquisition and preprocessing are carried out on a wiring harness terminal crimping process link, a first monitoring index and a second monitoring index are obtained by analyzing the shape of the wiring harness terminal and the crimping pressure of the wiring harness terminal, and the terminal shape change and the pressure change in the terminal crimping process are monitored in real time; defective products can be found in time and alarm shutdown can be triggered, so that the time and the labor cost of manual inspection are reduced, and the production efficiency is remarkably improved.

The invention relates to an active hydraulic suspension shock absorber which comprises an inner pipe, an outer pipe, a guider assembly, a piston, a piston rod, a suspension seat, a first electromagnetic valve assembly, a second electromagnetic valve assembly and an energy accumulator. Meanwhile, the first electromagnetic valve assembly, the second electromagnetic valve assembly and the energy accumulator are integrated in one part, the production efficiency is improved, the production and machining technology is simplified, the shock absorber can provide the best suspension performance under various driving conditions through the integrated electromagnetic valve assemblies and an optimized hydraulic control strategy, and the service life of the shock absorber is prolonged. And the dual requirements of modern automobiles on comfort and controllability are met.

The embodiment of the invention provides a differential Hall current sensor and a manufacturing method thereof, and belongs to the technical field of semiconductors. The differential Hall current sensor comprises a current bar; the insulating layer is bonded on the upper surface of the current bar; the at least two Hall elements are symmetrically arranged on the two sides of the upper surface of the insulating layer in the current direction; and the at least one deflection magnetism gathering block is attached to the magnetic induction surfaces of the at least two Hall elements and is used for deflecting a magnetic field component of the current magnetic field in the direction parallel to the magnetic induction surfaces of the Hall elements into a magnetic field component in the direction perpendicular to the magnetic induction surfaces of the Hall elements. According to the differential Hall current sensor, the current magnetic field is gathered through the deflection magnetism gathering block to form a conduction magnetic circuit, the directions of the magnetic field components are changed, the Hall element obtains the magnetic field intensity formed by superposing the magnetic field components in the two directions, and the measurement sensitivity is improved.

The invention discloses a wafer detection scattered light collection objective lens, and relates to the technical field of optical imaging. The scattered light collecting lens is applied to wafer defect detection, the scattered light collecting lens sequentially comprises a first lens group, a second lens group, a third lens group and a fourth lens group from an object plane to an image plane in the optical axis direction of the lens, twelve lenses and an aperture diaphragm, and the twelve lenses and the aperture diaphragm are coaxially arranged; the first lens group is a catadioptric lens group, has positive focal power, and is used for imaging an object plane to an intermediate image plane through two times of reflection. The numerical aperture of the acquisition objective lens provided by the invention is equal to 0.9, the field of view is equal to 2.6 mm, the acquisition objective lens has the characteristics of large field of view, large numerical aperture and small center shielding, the capability of detecting scattered light of defects can be greatly improved, chromatic aberration is corrected by adopting a refraction and reflection mode, and a wider laser bandwidth can be realized compared with a general refraction mode of combining CaF2 and fused quartz.

A buffering hardware hinge outside a cup comprises a hinge cup and a hinge arm, the hinge cup and the hinge arm are connected in a hinged mode through an upper connecting rod and a lower connecting rod, a guide groove penetrating through a body is formed in the bottom of the hinge cup, and a driving plate is installed at the outer bottom of the hinge cup in a covering mode; a sliding block is arranged on the top of the driving plate and installed in the guide groove in a sliding mode. The end, facing the hinge cup, of the upper connecting rod extends outwards to form a driving arm, and when the hinge is closed, the driving arm acts on the sliding block to push the sliding block to slide in the guide groove; a buffer is fixedly mounted at the outer bottom of the hinge arm, a piston rod or a cylinder body part of the buffer is connected with the driving plate, and the buffer has a damping effect on the movement of the driving plate, so that the damping effect when the hinge is closed is realized. The device has the beneficial effects that the buffer is installed outside the hinge arm, through the design of the guide groove and the driving plate, the external space is effectively utilized, and the problem that the internal space is limited is avoided.

The invention discloses a probe card simulation method and system based on counter-acting force analysis, which are used in the field of wafer simulation test, and the probe card simulation method comprises the following steps: integrating multiple physical field working conditions to construct a probe card geometric model, and importing the probe card geometric model into finite element simulation analysis software; carrying out grid division on the geometric model of the probe card by utilizing the hybrid voxel tree model, adjusting the grid density according to the distribution requirement of the multi-physical field, and setting a simulation boundary condition by utilizing a preset boundary condition template according to the actual simulation requirement; starting a simulation calculation process based on the adjusted grid density and simulated boundary conditions; and providing a visual interface of physical field distribution and a structural stress state in the simulation calculation process, and performing iterative optimization on the performance of the probe card in the simulation process according to a reactive force distribution result. According to the method, the grid density is automatically adjusted to adapt to changes of a physical field, and it is ensured that higher simulation precision is obtained in a key area.

The invention belongs to the technical field of distributed optical fiber sensing, and particularly relates to an OFDR system phase noise compensation device and method based on an or equivalent optical fiber loop auxiliary interferometer. The optical fiber 2 * 2 coupler and the delay optical fiber form a loop and serve as a delay optical path of the auxiliary interferometer, the optical delay can be doubled every time laser passes through the loop, and therefore a plurality of beat frequency signals with different optical delays are obtained. And according to the to-be-measured optical fibers at different distances on the main interferometer, the beat frequency signal of the auxiliary interferometer with the closest optical delay is selected for compensation. And splicing the compensated reflected signals at different distances to obtain a distance domain reflected signal of the whole sensing optical fiber, thereby realizing phase noise compensation in the full range of the OFDR system. The OFDR full-range high-precision measurement is realized, and the OFDR full-range high-precision measurement device has the characteristics of simple structure, stable performance, low manufacturing cost and the like.

The invention relates to a preparation method of a low-cost TC21 titanium alloy large-specification bar, which comprises the following steps: 1) carrying out two-heating cogging forging on a TC21 titanium alloy ingot: carrying out beta single-phase region high-temperature forging at the first heating to obtain an intermediate billet ingot with a square cross section; in the second heating number, low-temperature upsetting and reversing drawing-out forging are carried out, then high-temperature forging is carried out, and an intermediate billet cast ingot with the square section and the grain size being 1-2 mm is obtained; (2) three-heating-number bar forging is carried out, specifically, in the first heating number to the second heating number, the intermediate blank cast ingot is upset and then drawn out and forged into a blank with the octagonal section in each heating number, and in the third heating number, the intermediate blank is drawn out into an intermediate blank with the twelve-square section; and (3) forming and forging for one heating number, wherein the middle blank with the twelve-square section is milled into a rod blank with the round section and the required size. By means of the method, the uniformity of the bar structure is improved, and the TC21 titanium alloy large-specification bar with the structure and performance meeting the requirements of phi 350 mm can be prepared at low cost.

The invention provides a bismuth oxide-based epoxy resin composite material with a radiation shielding function as well as a preparation method and application of the bismuth oxide-based epoxy resin composite material. According to the preparation method disclosed by the invention, the bismuth oxide is subjected to surface modification, and after surface grafting modification by the coupling agent, the surface of the bismuth oxide is changed from strong hydrophilicity to strong hydrophobicity, so that the dispersity and interfacial compatibility of the bismuth oxide in an organic medium are remarkably improved. Secondly, preparing the composite material from the modified bismuth oxide, epoxy resin and a curing agent through a mechanical blending-vacuum defoaming combined process. On one hand, bismuth oxide, epoxy resin and a curing agent are uniformly mixed through mechanical blending; on the other hand, bubbles generated in the blending process are removed through vacuum negative pressure. The bismuth oxide in the composite material is uniformly distributed, no bubble exists in the body, and the surface is smooth and complete, so that the composite material has excellent gamma-ray shielding performance and good mechanical property. The process is simple, the yield is high, the product property is stable, and good economic benefits and environmental benefits are achieved.