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28results about How to "Guaranteed geometric accuracy" patented technology

Textile woven structure anomaly detection method

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.
Owner:IFLYTEK SOUTH CHINA ARTIFICIAL INTELLIGENCE RES INST GUANGZHOU CO LTD

Stone stone carving digital rubbing method based on three-dimensional laser scanning model

PendingCN119131296AIntegrity guaranteedGuaranteed geometric accuracyImage enhancement3D modellingStone carvingData set
The invention discloses a stele stone carving digital rubbing method based on a three-dimensional laser scanning model, and relates to the technical field of cultural relic protection and digitization, and the method comprises the steps: scanning a stele by using a three-dimensional data scanner, obtaining the three-dimensional data of the stele, and carrying out the data splicing to form a three-dimensional data set; preprocessing the three-dimensional data set and constructing a three-dimensional surface model of the stele; extracting a grey-scale map of the surface of the stele from the three-dimensional surface model; and gray information of the concave seam area on the surface of the stele is extracted from the gray-scale map, and a digital rubbing of the stele is generated according to the gray information. Complete three-dimensional data of the stele is obtained by using a three-dimensional laser scanner, the integrity of the data is ensured, a three-dimensional surface model is generated by using an advanced algorithm, the geometric accuracy of the model is ensured, an accurate basis is provided for the extraction of a grey-scale map, the extracted concave seam area information is more accurate, the definition and detail expressive force of the image are enhanced, and the image quality is improved. And the finally generated digital rubbing has high resolution and high contrast.
Owner:BEIJING HAOYU WORLD SURVEYING & MAPPING DEVELOPING CO LTD

Collision detection method and system based on 3D projection modeling, medium and program product

The invention discloses a collision detection method and system based on 3D projection modeling, a medium and a program product, and the method comprises the steps: receiving an approach monitoring video; establishing a collision surrounding cuboid model of the vehicle; acquiring video information of other articles in the parking lot, and establishing other collision surrounding cuboid models in one-to-one correspondence with the other articles; respectively projecting the collision surrounding cuboid model and other collision surrounding cuboid models onto a ground plane to obtain a vehicle rectangle and other rectangles; projecting the vehicle rectangle and other rectangles to the length and the width to obtain four projection results; when any projection result does not contain the coincident point, determining that the vehicle is in a safe state; when only the three projection results contain the coincident point, controlling a vehicle machine of the vehicle to send out preset early warning information; and when the four projection results all contain the coincident points, determining that the vehicle has an accident. The probability of collision or rubbing of automobiles in a narrow and complex parking lot is reduced.
Owner:SHENZHEN EFERCRO ELECTRONIC TECHNOLOGY CO LTD

Tension bridge type integral pi-shaped foot column type door beam

ActiveCN222114217UReliable lockingSuppress forward leaning momentLarge fixed membersBridge typeMachine tool
The utility model belongs to the technical field of machine tool manufacturing, and particularly discloses a tension bridge type integral pi-shaped foot column type door beam which comprises a cross beam and stand columns arranged at the bottoms of the two ends of the cross beam, the cross beam and the two stand columns are integrally cast into a door beam type, the cross beam is of a tension bridge type structure, and multiple layers of arc rib plates are arranged in the cross beam. Wherein each group of stand columns are locked and fixed on the bottom surfaces of the corresponding foot columns, the cross beams are connected with sliding seats in a sliding mode, the cross beams and the stand columns are integrally cast into a door beam type, the locking portions of the door beam are located at the bottoms of the foot columns, cutting torque cannot cause any influence on the locking portions, and locking is firm and reliable.
Owner:ANHUI WULUAN MASCH TOOL TECH CO LTD

Large-section steel box girder gantry crane general splicing platform and construction method

The invention provides a large-section steel box girder gantry crane general splicing platform and a construction method, and the construction method comprises the following steps: step 1, separating a transport ship support from an existing trestle panel, step 2, extending the top of an existing pipe pile to connect with a bracket, step 3, erecting a bracket system, step 4, moving away a transport ship, step 5, installing a hoisting system, and step 6, arranging a splicing system. 7, a reverse jacking system is arranged; and 8, steel box girder installation and reverse jacking operation are carried out. Through mutual connection and supporting of the support and the reverse jacking system, the hoisting and splicing stability and the beam body precision are improved, the construction process is simplified, the efficiency is improved, meanwhile, the adaptability to different environments is enhanced through the existing trestle and the water transport ship, and particularly the application in water area construction is enhanced.
Owner:HUBEI ROAD & BRIDGE GRP CO LTD +1

Spline finite element method for contact stress calculation

The invention discloses a spline finite element method for contact stress calculation. The spline finite element method comprises the following steps: establishing a geometric model for contact of a plurality of deformable bodies, obtaining spline units, inputting material parameters, applying displacement and surface force boundary conditions, and appointing a main contact surface and a slave contact surface; on the slave contact surface, a control point projection method is adopted to obtain projection points, corresponding to control points of the spline units, on the deformable body; calculating a conversion matrix based on the projection points to obtain an interpolation spline primary function which is associated with the projection points on the slave contact surface and has interpolation characteristics; and calculating a system stiffness matrix by using a mixed form of a conventional spline basis function and an interpolation spline basis function, applying a contact constraint condition, and solving to obtain the contact stress. Under the condition of guaranteeing geometric accuracy of the model, compared with an existing point-to-surface method, the contact stress can be effectively calculated, and the heavy calculation amount of an existing face-to-face contact analysis model in a spline finite element method is avoided.
Owner:MIDDLE EAST TECHNOLOGY IND GROUP CO LTD

Rocket thrust chamber inner wall machining deformation control and self-adaption device

The invention provides a rocket thrust chamber inner wall machining deformation control and self-adaption device, and belongs to the technical field of rocket thrust chamber machining. Comprising a rocket thrust chamber, a mounting and placing platform with an annular clamping notch formed in the upper end, a regulating and filling tool arranged on the mounting and placing platform in the vertical direction, and a fastening assembly arranged on the mounting and placing platform and used for clamping the upper end and the lower end of the regulating and filling tool. The rocket thrust chamber is filled with the adjusting and controlling filling tool, customization can be conducted according to the specific shape and size of the rocket thrust chamber, deformation of the inner wall of the thrust chamber is accurately controlled by adjusting and controlling the pressure and shape of the filling tool, the geometric accuracy in the machining process is ensured, and the adjusting and controlling filling tool provides accurate positioning and supporting in the rocket thrust chamber; and it is ensured that the geometric shape and the size precision of the rocket thrust chamber are controlled in the machining process.
Owner:SHAANXI SIRUI ADVANCED MATERIALS CO LTD

A busbar trunking cutting and shearing device

This utility model discloses a busbar trunking cutting and shearing device, applied in the field of power distribution equipment processing technology. It includes a trunking plate B, with side plates B slidably connected to both sides of the inner wall of the trunking plate B. A connecting rod B is bolted to opposite sides of the two side plates B. Sliding sleeves are bolted to the top and bottom of the connecting rod B. This utility model uses concentric clamping to evenly distribute cutting stress, avoiding twisting or local deformation of the busbar trunking due to unilateral force, maintaining the geometric accuracy of the conductor arrangement, effectively offsetting vibrations generated by the contact between the tool and the material during cutting, reducing the risk of chipped edges, and avoiding tilted or stepped cross-sections caused by workpiece offset. Timely separation avoids slippage or tipping of the cut piece due to gravity and mechanical stress, reducing secondary injuries such as pinching and collisions. The separation action reduces continuous friction between the cutting surface and the tool, preventing the expansion of burrs and extending the tool's service life.
Owner:DANYANG TIELONG PASSENGER AIRCRAFT PARTS CO LTD

Method, medium and system for generating layer by cutting on-line satellite image

The invention provides a method, a medium and a system for generating a layer by cutting an online satellite image, belongs to the technical field of image data processing, and particularly relates to partition storage and hierarchical management of to-be-processed satellite image data by establishing a satellite image spatial index database, a multi-level image pyramid and a multi-level image memory pool. And obtaining to-be-processed image slice data from the target pyramid hierarchy based on parameters in the image layer cutting request, distributing the to-be-processed image slice data to the corresponding target memory pool hierarchy, performing atmospheric correction processing by adopting a radiation transfer equation set and performing edge feathering processing by adopting a weight calculation equation set, and finally generating target image layer data. Wherein the multi-level image pyramid is stored in a system cache, meanwhile, a multi-level image memory pool is established, and the level number of the multi-level image memory pool corresponds to the level number of the multi-level image pyramid in a one-to-one mode. The technical problem that in the prior art, the quality of a cut layer formed after splicing is not ideal is solved.
Owner:山东省地图院 +1

Forming and curing integrated device for calcium fluoride sludge building materials

The utility model discloses a calcium fluoride sludge building material forming and maintaining integrated device which comprises a feeding mechanism and a forming mechanism, a maintaining mechanism is arranged on the forming mechanism, the feeding mechanism comprises a feeding hopper, an equipment frame, a feeding frame and a second hydraulic telescopic rod, and the feeding hopper is fixedly installed on the equipment frame; the feeding frame is located at the lower end of the feeding hopper and slidably connected with the equipment frame, the second hydraulic telescopic rod is fixedly installed on the feeding hopper and drives the feeding frame, the forming mechanism comprises an upper pressing die, a lower pressing die, a third hydraulic telescopic rod and a fourth hydraulic telescopic rod, and the upper pressing die is slidably connected with the equipment frame through the third hydraulic telescopic rod; the lower pressing die is in sliding connection with the equipment frame through a fourth hydraulic telescopic rod. The device has the advantages of high integration degree, accurate automatic control and good curing effect, and solves the problems of low production efficiency, high blank breakage rate and poor product crack resistance caused by separation of molding and curing in the traditional process.
Owner:JIANGXI SANDIJIE ENVIRONMENTAL PROTECTION TECHNOLOGY CO LTD

A method for three-dimensional hair reconstruction robust to adaptive gaussian ellipsoid and complex lighting

PendingCN122289553AImprove rebuild speedNo human intervention requiredAlgorithmComputer graphics
This invention discloses a robust 3D hair reconstruction method with adaptive Gaussian ellipsoids and complex lighting, relating to the fields of 3D vision and computer graphics. Addressing the problems of sparse Gaussian ellipsoid distribution, unreliable orientation supervision signals, and geometric and texture coupling interference in existing multi-view hair reconstruction methods under non-ideal lighting, this invention employs a two-stage approach. It utilizes anisotropic Gaussian units to implicitly encode hair orientation and directly transfers the photometric constraint gradient to hair nodes through hair-aligned Gaussian dual representation, achieving efficient and high-precision hair-level reconstruction. Simultaneously, an adaptive lighting preprocessing flow is constructed, using a visual language model to locate low-quality viewpoints and dynamically setting the upper limit of Gaussian density. A three-stage adaptive density strategy is used to fill geometric gaps. Decoupled two-stage optimization is employed to eliminate lighting bias and restore true hair color. Furthermore, confidence-weighted orientation loss and 3D interpolation-guided upsampling are used to improve the orientation field quality and constraint coverage.
Owner:TIANJIN UNIV

High-order continuity maintenance and error control method in STL curved surface reconstruction process

PendingCN121999136AAdapt to geometric changesReasonable distribution3D modellingSpherical harmonicsEngineering
The invention provides a high-order continuity maintenance and error control method in an STL curved surface reconstruction process, and relates to the technical field of three-dimensional modeling, and the method comprises the steps: obtaining the connection information of discrete data, constructing a continuous normal vector field based on spherical harmonic decomposition, carrying out the frequency domain processing of a vertex coordinate and a normal vector, and recognizing high-frequency details, and calculating a main curvature direction to determine an insertion control point, and iteratively optimizing the normal deviation until convergence. According to the method, the high-order continuity of the STL curved surface can be effectively kept, the reconstruction error is accurately controlled, and the geometric accuracy and quality of the reconstructed curved surface are improved.
Owner:SUZHOU SHUYIJIDIAN INFORMATION TECHNOLOGY CO LTD

Online real-time dynamic slicing method for laser additive manufacturing

The invention discloses an online real-time dynamic slicing method for laser additive manufacturing (LAM), relates to the technical field of laser additive manufacturing, and relates to the technical field of laser additive manufacturing. According to a preset processing path filling mode, layer thickness and other parameters, slicing software in the server starts to carry out partial slicing operation on the workpiece model, and a slicing and scanning path planning result is obtained; the slicing result of the part of the workpiece model is sent to an industrial personal computer of LAM equipment in an Ethernet communication mode to enable the industrial personal computer to start working; and in the LAM process, the working mode of the LAM equipment is that forming is executed while the slicing result is received, and the slicing software eliminates the formed part through Boolean operation of the three-dimensional model. According to the method, slicing while forming is supported, adjustment of important machining parameters such as the slice layer thickness, the scanning path and the scanning speed is also supported, and online regulation and control of the forming quality and online repair of forming defects are achieved. In addition, the efficient geometric algorithm is adopted, so that the slicing efficiency when the method is used for processing the complex geometric component can be effectively improved.
Owner:CHINA MASCH INST OF ADVANCED MATERIALS (ZHENGZHOU) CO LTD

Scaffold structure for building outer wall construction

ActiveCN119288173AReduces the risk of loose connectionsSimplify inspection workScaffold connections
The invention discloses a scaffold structure for building outer wall construction, which relates to the field of scaffolds, and comprises vertical rods and cross rods, and further comprises an outer protective plate positioned at the butt joint of the two vertical rods, four through grooves are formed in the upper section of the vertical rod, and limiting rings are arranged on the outer walls of the upper section and the lower section of the vertical rod; two limiting grooves are correspondingly formed in the inner side of the outer protection plate based on the two limiting rings, adjacent to the butt joint position, of the two vertical rods after butt joint. According to the scaffold structure for building outer wall construction, due to the fact that the connecting position of the two vertical rods is wrapped by the outer protection plate, additional physical support is provided for the vertical rods and the transverse rods, the risk of connection looseness caused by external force impact or long-term vibration is efficiently reduced, and daily inspection and maintenance work is indirectly simplified; furthermore, the structural component mainly playing a role in connecting and fixing is not positioned on the outer side, so that the scaffold can be prevented from being eroded by external environmental factors in the actual use process, and the service life of scaffold materials is indirectly prolonged.
Owner:JIANGSU TIANFU CONSTR ENG CO LTD

A worm manufacturing process method applied to a humanoid robot dexterous hand

PendingCN122274582AGuaranteed geometric accuracySolve the problem of uneven distribution of temperature fieldHumanoid robot naoManufacturing technology
This invention relates to the field of mechanical manufacturing technology and discloses a manufacturing process for a worm gear used in the dexterous hand of a humanoid robot, comprising the following specific steps: Step 1: Material selection and pretreatment; Step 2: Rough turning and semi-finish turning; Step 3: Thread forming; Step 4: Heat treatment process, placing the worm gear formed in Step 3 into a vacuum heat treatment furnace for further processing; Step 5: Fine grinding and polishing; Step 6: Cleaning and rust prevention treatment. This invention achieves austenitization by heating the worm gear to 820℃~880℃ at a rate of 8℃ / min~12℃ / min in a vacuum heat treatment furnace, holding it at that temperature for 20min~40min, followed by high-pressure gas quenching, with the cooling rate controlled at 60℃ / s~100℃ / s. A closed-loop control using an infrared thermometer ensures an axial temperature difference ≤15℃, effectively solving the problem of uneven temperature distribution caused by differences in cross-sectional dimensions.
Owner:DONGGUAN HANTAI PRECISION METAL PROD CO LTD

A large arc bending injection mold and injection molding method

PendingCN122077867AExtended service lifeGuaranteed geometric accuracyMold removalHigh voltage
This invention discloses a large-arc bend injection mold and molding method, belonging to the field of injection molding technology. The mold includes a moving mold, a fixed mold, and a core mold with a circular arc core; it also includes a demolding drive mechanism for driving the core mold and product to generate a first displacement away from the fixed mold; and a pointer-type rotary demolding mechanism, which includes a pointer push rod and a push ring rotating around the axis of the circular arc core. During demolding, after the product is lifted with the core mold, the pointer push rod drives the push ring to swing along the circular arc path to push the product out. This invention also reduces the covering force by performing pre-demolding through an assisted demolding mechanism and ensures the stability of the core mold during injection molding using a core positioning mechanism. This invention replaces the traditional hot bending process with one-time injection molding, solving the problems of low production efficiency, poor roundness, and easy cracking caused by thermal stress in existing technologies for large-arc bend pipes, significantly improving the geometric accuracy and operational reliability of the product, and is particularly suitable for ultra-high voltage converter valve cooling system pipelines.
Owner:PIPELINE (TIANJIN) POLYMER MATERIALS CO LTD

Steel tube concrete connection node and its construction method

A steel tube concrete connection node and a construction method thereof, the connection node comprising: a first clamp, a second clamp and a plurality of fastening components, the second clamp being a semicircular cylinder designed to be concentric, coaxial and cocircular with the first clamp, and being fastened by hinges to form a tight-allowance cylindrical cylinder structure, scale lines are provided at intermediate height positions on the first clamp and the second clamp, and support plate insertion holes and observation holes are provided along the scale lines; the plurality of fastening components are used to fix the first clamp and the second clamp, when the connection node is inserted into a lower steel tube, the positioning support plate is clamped in position so that the lower steel tube port is flush with the scale lines, at this time, the upper steel tube is installed to dock with the lower steel tube, the clamp is fixed by the fastening components, the positioning support plate is pulled out and the upper and lower steel tubes are spot welded through the support plate insertion holes, after the clamp is removed, the upper and lower steel tubes are circumferentially welded, thereby realizing quick and accurate welding of two sections of steel tube concrete to be poured.
Owner:ROCKET FORCE UNIV OF ENG

Heat conduction analysis method and system, electronic equipment and storage medium

The invention provides a heat conduction analysis method and system, and belongs to the technical field of heat conduction simulation, and the method comprises the steps: dividing a dispersion fuel into a preset number of cylinder regions, and building the spatial position coordinates of all fuel particles in each cylinder region; all spatial position coordinates are imported into finite element simulation software, and a geometric model containing fuel particles is established; setting calculation conditions of the geometric model; grid division is conducted on the geometric model, and fuel temperature distribution is calculated based on grid division and calculation conditions; and after the fuel temperature distribution passes the grid independence verification, extracting the highest temperature of the fuel and the average temperature of all the cylinder regions from the fuel temperature distribution. According to the method, the cylinder area is accurately divided, the spatial position coordinates of the fuel particles are established, and fine grid division of finite element simulation software and multi-layer material calculation condition setting are combined, so that accurate temperature distribution simulation in the fuel column of the high-temperature gas cooled reactor is realized, and the accuracy of fuel temperature distribution calculation is effectively improved.
Owner:CHINA STATE SHIPBUILDING CORP LTD RESEARCH INSTITUTE 719

Interlayer bonding strength tester and encoder assembly thereof

The utility model provides an interlayer bonding strength tester and an encoder assembly thereof, and belongs to the technical field of paper quality detection. The encoder comprises an encoder shell arranged between the rear end of a swing main shaft and a frame body, a grating disc is arranged in the encoder shell, the rear end of the swing main shaft penetrates through a main shaft hole of the encoder shell and is fixed to the grating disc, and a photoelectric sensor is arranged between the encoder shell and the grating disc. And at least one first bearing positioned outside the encoder shell is arranged between the swinging main shaft and the frame body. The bearing is externally arranged to block the transmission path of kinetic energy of the test swing rod to the interior of the encoder shell, non-contact angle measurement is achieved, interference of mechanical friction to signals is eliminated, energy consumption can be effectively reduced, and measurement precision can be effectively improved.
Owner:ZHEJIANG YANTE SCI INSTR CO LTD

Wave generator, harmonic reducer and industrial robot

PendingCN119572695AGuaranteed geometric accuracyGuaranteed shape and position accuracyGearingPortable liftingInterference fitReduction drive
The invention discloses a wave generator, a harmonic reducer and an industrial robot, and relates to the field of harmonic reducers. The wave generator comprises a cam, an outer ring, a retainer and a plurality of rolling bodies, the rolling bodies are arranged between a first roller path of an annular part and a second roller path of the outer ring, the positions of the rolling bodies are limited through the retainer, and friction force generated when the cam rotates can be reduced. The cam comprises the annular part fixedly connected to the base part, and the first raceway is machined after the annular part is fixed to the base part, so that the problem that the first raceway is distorted due to the fact that the base part and the annular part need to be in interference fit is solved, the geometric accuracy and the form and position accuracy of the first raceway are guaranteed, and the operation stability of the wave generator is improved. And meanwhile, the problem that the annular part is easy to break and lose efficacy under the repeated action of alternating bending stress can be solved, so that the strength of the annular part is improved, and the service life of the wave generator is prolonged.
Owner:GUANGDONG JIYA PRECISION MASCH TECH CO LTD

High-voltage pulse deburring device and using method thereof

The invention relates to a high-voltage pulse deburring device and a using method thereof, and belongs to the technical field of electric vacuum device manufacturing, the high-voltage pulse deburring device comprises an ignition power supply unit, a pulse modulation and boosting unit, an energy power supply unit, a pulse forming network, a detection power supply unit and an output terminal, high-voltage ignition pulses are modulated by the pulse modulation and boosting unit; the energy power supply unit outputs a second direct-current voltage; and the detection power supply unit outputs a third direct-current high voltage and cooperates with the double-range leakage current detection meter to perform a withstand voltage test. According to the invention, the functions of ignition, ablation and detection are integrated, and the deburring process which is efficient, energy-saving, accurate and controllable in energy, free of damage to electrodes and simplified in process is realized through ignition and ablation separation design, pulse width and hot melting time constant matching, automatic switching of circuit isolation devices and safe interlocking of a control unit.
Owner:CHENGDU GUANGDA POWER ELECTRONICS RES INST

A precision grinding method for a tool assembly, a tool assembly and an application

The application discloses a precision grinding method for a cutter assembly, the cutter assembly and application, and the cutter assembly has a precision ground cutter head, cutter square and cutter rod, and the precision grinding method comprises the following steps: welding the cutter head to the end of the cutter square which is processed by grinding to form an integrated cutter; coarsely grinding the cutter by fixing the cutter on a coarse grinding seat, determining the zero point of the cutter head, adjusting the first grinding wheel based on the cutter band parameters and the first grinding parameters and the zero point to coarsely grind the two sides and the end of the cutter head, and obtaining left and right cutter surfaces and a coarsely ground auxiliary surface; finely grinding the cutter by fixing the cutter on a fine grinding seat, determining the cutter reference surface, adjusting the second grinding wheel based on the second grinding parameters and the zero point to finely grind the two sides of the cutter head, and obtaining left and right cutter bands; and adjusting and positioning the finely ground cutter by performing a planar finishing treatment on the finely ground cutter and adjusting the cutter to be fixed on the cutter rod according to a preset rotation radius. The application can stably and efficiently prepare the cutter with high precision, excellent blade geometry and surface quality.
Owner:ZHEJIANG GOLDEN CONNECTION TECH CO LTD

A timber cutting machine

This invention provides a wood cutting machine, including a negative pressure conveying device and a cutting device. The cutting device includes a support, a crossbeam, a first drive mechanism, a working arm, a second drive mechanism, and a cutting mechanism. The crossbeam is vertically and vertically mounted on the support; the working arm is horizontally and horizontally mounted on the crossbeam; and the cutting mechanism is mounted on the working arm via an angle adjustment structure. In use, the first drive mechanism drives the crossbeam to move vertically, the second drive mechanism drives the working arm to move horizontally, and the angle adjustment structure drives the cutting mechanism to swing within a preset angle range. This invention, through the coordinated operation of the first drive mechanism, the second drive mechanism, and the angle adjustment structure, achieves motion control of the cutting mechanism in three dimensions: vertical, horizontal, and angular. It can adapt to complex cutting needs, avoids dimensional deviations and roughness problems caused by manual cutting, reduces reliance on operator experience and skills, avoids extensive manual intervention, and reduces labor intensity.
Owner:QINGDAO SHIDONG HONGCHAO MASCH CO LTD

Aquifer hydrogen storage cover rock surface wettability determination method

The invention discloses a method for measuring the surface wettability of overlying rock of a hydrogen storage reservoir of an aquifer, and belongs to the technical field of wettability measurement. Comprising the following steps: establishing a semi-cylindrical water molecule aggregate model on the surface of a cover rock mineral model; dividing simulation areas and boundary conditions; selecting a force field function, and describing interaction forces inside molecules and among the molecules; performing structure optimization on the hydrogen-water-cover layer three-phase coexisting contact surface model; related simulation parameters and ensembles are determined; and performing molecular dynamics simulation on the hydrogen-water-cover layer wettability molecular model to obtain a wettability simulation result. The method is applied to the aspect of measuring the surface wettability of the overlying rock of the hydrogen storage reservoir of the aquifer, and solves the problems that an existing wettability measuring method cannot accurately reflect the surface wettability of the overlying rock of the hydrogen storage reservoir of the aquifer and is low in calculation efficiency. The method has the characteristics of being capable of calculating the wetting angles of the water molecules under the mineral surface hydrogen environment of different mineral materials and high in calculation precision.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)

A grommet adhesive medium forming device

ActiveCN224406173UAvoid disordered deformationSolve defects such as wrinkles caused by compressive stressMolding machineGasket
The utility model relates to a kind of gasket ring adhesive medium forming devices, comprising: mould closing mechanism, it includes: upper die holder, upper die body, punch and lower die body, the upper die holder is movably arranged in one side of lower die body, the upper die body is connected to upper die holder, accommodating cavity and forming cavity are formed between the upper die body and lower die body respectively, the accommodating cavity is filled with medium;Forming mechanism, it includes: first sealing ring and second sealing ring respectively arranged in upper die body and lower die body, the first sealing ring and second sealing ring are respectively provided with first stop face and second stop face. The utility model can effectively solve the wrinkling defects caused by compressive stress in C-shaped cross-section bulging, while ensuring the geometric accuracy and increasing the material utilization.
Owner:SUZHOU UNIV

Badminton racket frame preforming equipment and forming process thereof

ActiveCN121946889AImprove molding quality consistencyfit tightlyDomestic articlesManufacturing technologyElectric machinery
The invention relates to the technical field of badminton racket manufacturing, and particularly discloses badminton racket frame preforming equipment and a forming process thereof. The equipment comprises a pressing unit, a jacking unit and an inner mold unit, the pressing unit fastens an upper outer mold and a lower outer mold through a V-shaped frame, and the forming surface of the outer mold is provided with a vacuumizing micropore and is connected with a vacuum generation device through an air pipe penetrating through the V-shaped frame; the inner mold unit comprises an elastic bag body and a top cover, profiling supporting assemblies are symmetrically arranged on the top cover, a hollow rod driven by a motor is arranged on a supporting and unfolding part of the inner mold unit, and an inner cavity of the elastic bag body is divided into a plurality of independent pressurizing areas. The jacking unit is provided with a partition plate capable of moving up and down. According to the technology, forming is completed through the steps of profiling supporting, forming of a temporary supporting face through stretching of a hollow rod, laying, retraction and remaining of a laminated layer, mold closing, vacuum adsorption, partitioned pressurization, heating curing, demolding and the like. According to the invention, the lamination adhesion is effectively avoided, the differentiated pressurizing, integrated supporting, heating and maintaining functions are realized, and the forming quality and the equipment maintainability are obviously improved.
Owner:SHISHI HUAISHENG SPORTING GOODS CO LTD

Reticulated shell structure of ellipsoid with large opening in vertical face and large span

The utility model discloses a latticed shell structure of a vertical face large-opening large-span ellipsoid, and relates to the technical field of latticed shell structures. Comprising a center node, a mounting mechanism for a vertical-face large-opening large-span ellipsoid reticulated shell frame is arranged on the outer side of the center node, the mounting mechanism comprises a clamping assembly, the clamping assembly comprises a positioning groove formed in the outer wall of the center node, and a first reticulated shell frame is clamped in the positioning groove; after the latticed shell frame on the outer wall of the center joint is installed, the screw rod is rotated to enable the supporting block to ascend through the telescopic sleeve rod, the supporting groove in the top end of the supporting rod on the outer wall of the supporting block is driven to conduct jacking, and the supporting rod is driven to rotate. And the supporting grooves are supported and clamped at the joint of the first reticulated shell frame and the second reticulated shell frame, so that the load is uniformly transmitted to the supporting blocks, additional supporting points are provided for the reticulated shell frames, and the rigidity and the stability of the whole structure are improved.
Owner:ZHEJIANG SOUTHEAST SPACE FRAME CO LTD