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72 results about "Material density" patented technology

Material density, more often referred to simply as density, is a quantitative expression of the amount of mass contained per unit volume . The standard unit is the kilogram per meter cubed (kg/m 3 or kg · m -3 ). Density is sometimes expressed in grams per centimeter cubed (g/cm 3 or gm · cm-3).

Topological optimization design method and device integrating subjective preference and storage medium

The invention relates to the field of computer-aided engineering and intelligent manufacturing, and provides a topological optimization design method integrating subjective preferences. The method comprises the following steps: initializing material density distribution in a design domain, and intelligently recommending an initial density distribution scheme according to a subjective preference type selected by a user; calculating an objective response value and sensitivity thereof; calling a pre-trained subjective preference scoring model to subjectively evaluate the current material density distribution, outputting a subjective evaluation value, and calculating the sensitivity of the subjective evaluation value based on a numerical perturbation method; the objective response value, the sensitivity of the objective response value, the subjective evaluation value and the sensitivity of the subjective evaluation value are input into an MMA optimizer for iterative calculation, and material density distribution is dynamically updated to balance subjective preference and objective constraint; and judging whether the updated material density distribution meets a convergence condition set by a user, if so, performing post-processing visualization on the optimized material density distribution, and outputting a final topological configuration, otherwise, returning to a new round of iteration.
Owner:SHENZHEN POISSON SOFTWARE TECH CO LTD

Topological optimization design method and system for failure safety of fiber composite material under dynamic load

The invention belongs to the technical field of structure optimization design, and particularly relates to a fiber composite failure safety topological optimization design method and system under a dynamic load, and the method comprises the steps: defining a design domain and related design parameters based on the stress working condition and geometric characteristics of a to-be-optimized structure; carrying out transient dynamic analysis and constructing an equivalent static load for topological optimization, constructing a multi-local failure working condition by taking material density, angle subinterval selection and a fiber angle as design variables, introducing an equivalent directional stiffness matrix continuously related to the fiber angle, and aggregating a multi-working-condition flexibility target by adopting a normalized KS function; failure safety topological optimization iteration and internal and external circulation convergence judgment are carried out in combination with a moving asymptote method, and collaborative optimization of structural topology and fiber orientation is achieved under the dynamic load condition. The problem that it is difficult to consider structural redundancy, failure safety and fiber orientation collaborative design in fiber reinforced composite topological optimization under the dynamic load is solved, and structural safety redundancy and local damage resistance are improved.
Owner:HUNAN UNIV

Testing method for young's modulus and poisson's ratio based on square plate

A testing method for Young's modulus and Poisson's ratio based on a square plate is provided, which including: obtaining a height, a length, a density, and a quality information of the square plate specimen; measuring the first-order torsional frequencie and the second-order torsional frequencie of the square plate specimen; calculating Poisson's ratio based on the height, the length, the first-order torsional frequency, and the second-order torsional frequency of the square plate specimen; calculating the Young's modulus of the square plate specimen based on the Poisson's ratio and the density. The method establishes a continuous function relationship between the parameter set of the test specimen and the torsional frequency using homotopy method, which can be used to calculate Poisson's ratio. When the material density and Poisson's ratio are known, the Young's modulus can be calculated in conjunction with ANSYS software. The method has advantages in both testing efficiency and accuracy.
Owner:KUNMING UNIVERSITY

High-toughness light-weight automobile body material for new energy automobile

InactiveCN121653467ANonferrous metalNew energy
The invention discloses a high-toughness light-weight automobile body material for a new energy automobile, and belongs to the technical field of advanced non-ferrous metal materials, the material comprises, by weight, 1.2%-1.8% of Li, 0.8%-1.5% of Cu, 0.6%-1.2% of Mg, 0.3%-0.8% of Zn, 0.10%-0.18% of Zr, 0.05%-0.15% of Sc, 0.02%-0.08% of Ti, less than or equal to 0.15% of Fe, less than or equal to 0.12% of Si and the balance Al and inevitable impurities, by optimizing the alloy component proportion and the preparation technology, the material density is reduced to 2.58 g / cm < 3 >-2.65 g / cm < 3 >, the tensile strength reaches 520 MPa-580 MPa, the elongation at break reaches 12%-16%, and the service life of the material is prolonged. The alloy has the advantages that the tensile strength is high, the fracture toughness reaches 28 MPa.m < 0.5 >-35 MPa.m < 0.5 >, the anisotropy difference is smaller than 15%, the welding joint coefficient reaches 0.75-0.85, the comprehensive performance is excellent, and the alloy is suitable for manufacturing new energy automobile body structural parts.
Owner:CHANGCHUN DAZHENG AUTOMATIC EQUIP

Material level detection device for solid material in stock bin and solid stock bin

The utility model discloses a material level detection device for solid materials in a stock bin and the solid stock bin, and belongs to the technical field of material level measurement equipment. The device comprises a moving rod, a cambered surface movable cover, a linear bearing guide piece, an adjustable check ring, a spring elastic piece and the like, a sealing structure is formed through a flexible connecting piece (an organ cover), and material interference is avoided. The adjustable check ring is combined with the key connection design, the detection pressure can be adjusted according to the material density, and detection of particles, powder and other solid materials is adapted. The device solves the problems of dust interference, misjudgment of hanging materials, mechanical abrasion, complex calibration and the like in the prior art, has the advantages of being high in environmental adaptability, small in abrasion, convenient and fast to maintain and the like, can effectively achieve automatic detection of the high and low material levels of the stock bin, and guarantees the stability of continuous production.
Owner:ZHEJIANG JINGGONG SCI & TECH

Preparation method of graphene composite powder

The embodiment of the invention provides a preparation method of graphene composite powder. The preparation method comprises the following steps: adding a mixed material of powder and a solid carbon source into a reaction cavity; vacuumizing the interior of the reaction cavity, and then filling inert gas to normal pressure; treating the mixed material in the reaction cavity by adopting an acoustic resonance process, and setting sound wave frequency, acceleration, treatment time and material temperature; and collecting products, and cleaning and separating powder. A mixed material in a reaction cavity is treated by adopting an acoustic resonance process, direct contact friction between a grinding material and powder is avoided through acoustic resonance mixing, the risk that impurities are introduced due to mechanical abrasion is reduced, and the problems that the cost is high and the compounding efficiency is low when graphene powder is prepared through a conventional vapor deposition method are solved; the acoustic streaming effect generated by resonance can permeate into the powder aggregate, the aggregate structure is effectively disassembled and is not influenced by different material densities, powder particles with different particle sizes and different components are promoted to be uniformly dispersed and interacted, and the shape of the original powder is not changed.
Owner:上海氢田新材料科技有限公司

Heavy hammer for hydrographic survey

The invention relates to a heavy hammer for hydrographic survey, and belongs to the technical field of hydrographic survey instruments. The design of the heavy hammer is based on taking a volume V, a material density rho and a shape parameter as core decision variables and taking a minimum mass m as a target function; the optimal mathematical model meets the requirements of a water surface tension change threshold value delta T1 caused by buoyancy, a water bottom tension change threshold value delta T2 caused by water bottom support, a terminal sinking speed threshold value vmin, the maximum mass gamma < = 0.5 kg and the maximum boundary dimension constraint. The heavy hammer is spherical, drop-shaped or torpedo-shaped, specific volume, density and mass parameters are obtained through optimization calculation, and high-tension detection sensitivity and rapid sinking efficiency are achieved while portability is ensured. Preferably, the heavy hammer is of a separable assembly type structure, and a containing cavity and a counterweight metal block are arranged in the heavy hammer so as to adjust the density and the mass. According to the system, the problem of contradiction between performance indexes in heavy hammer design is solved, and the comprehensive measurement performance is remarkably improved.
Owner:CHANGSHA CHUANGQING SYNERGY INTELLIGENT EQUIPMENT CO LTD

An alloy material for scale and wax prevention of circulating water system and a surface treatment method thereof

This invention discloses an anti-scaling and anti-wax alloy material for circulating water systems and its surface treatment method, relating to the field of scale inhibition and prevention. The material includes an alloy matrix, the chemical composition of which, by mass percentage, is as follows: Cu 60-75%, Zn 15-28%, Al 3-8%, Ni 1.2-3.5%, Sn 0.5-2.0%, rare earth composite agent 0.1-0.8%, B 0.02-0.15%, with the balance being unavoidable metallurgical impurities. The metallographic structure of the alloy matrix is ​​ultrafine equiaxed crystals with an average grain size ≤5μm and a material density ≥99.5%. This invention utilizes a Cu-Zn-Al-Ni-Sn alloy system with a specific ratio of rare earth composite agent and trace amounts of boron, supplemented by ultrafine equiaxed crystal structure control, and then undergoes a composite surface treatment involving plasma nitriding, micro-arc oxidation, and vacuum impregnation with fluorosilane. The resulting anti-scaling and anti-wax alloy material for circulating water systems possesses both stable mechanical and electrical properties and excellent adaptability to the water environment.
Owner:SHANGHAI YANGCHUN CHEMICAL CO LTD

Automatic feeding and discharging control system for plate and control method thereof

PendingCN122426485ATask analysisControl system
The present application relates to the technical field of automation plate processing and carrying control, and particularly relates to a plate automatic feeding and discharging control system and a control method thereof, which comprises: a task analysis module, which receives an external production task and calculates the external production task into processing procedure parameters containing plate geometric size, thickness and material density characteristics; and a gravity calculation module, which calculates plate mass distribution based on the processing procedure parameters and outputs gravity matrix data containing target gravity coordinates, suction cup matrix gating strategy and plate specification characteristics. In the present application, through automatic detection and calculation of plate geometric characteristics and density information, on-demand dynamic gating of the suction cup array and adaptive calculation of the vacuum negative pressure threshold are realized, frequent parameter adjustment caused by plate specification changes in the traditional manual teaching mode is avoided, and the automatic adaptation capability of the feeding process to multi-specification plates is improved.
Owner:扬州安特自动化科技有限公司

Vibration modal analysis methods, devices, equipment, and vehicles for vehicle spoilers

This application relates to the field of vehicle-related technology, and discloses a method, apparatus, equipment, and vehicle for vibration modal analysis of a vehicle spoiler. The Z-axis dimension of the target portion in the X-direction cross-section of the spoiler is smaller than the Z-axis dimensions of its two side portions. The method includes: substituting the free end overhang length, intermediate cavity height, elastic modulus, and material density of the spoiler into a preset simplified estimation formula for calculation, and outputting a first-order vibration modal estimation value; the intermediate cavity height is the Z-direction cross-sectional height at the narrowest cavity of the spoiler; the preset simplified estimation formula satisfies that: the square of the first-order vibration modal estimation value is directly proportional to the product of the elastic modulus and the square of the intermediate cavity height, and inversely proportional to the product of the material density and the fourth power of the free end overhang length; based on the first-order vibration modal estimation value, the vibration modal analysis result of the spoiler is determined. Applying the technical solution of this application can solve the problems of high analysis resource consumption, low efficiency, and high cost currently existing.
Owner:AVATR CO LTD

Method for producing silver tin oxide wire for rivet type contact

This invention discloses a method for preparing silver-tin oxide wire for rivet-type contacts. The technical solution employs a bidirectional hot pressing process, which greatly improves the density of the ingot, resulting in near-fully dense finished wire. This improves the wire's plastic deformation capability and avoids cracking abnormalities caused by poor material density during subsequent rivet manufacturing. A low-hardness pure silver plating layer is formed by spraying onto the ingot surface, directly preventing the high-hardness silver-tin oxide layer from contacting the extrusion liner, extrusion die, extrusion nozzle, drawing die, and annealing fixture during hot extrusion, hot drawing, and annealing processes. This significantly improves the surface quality of the final finished wire, thereby mitigating cracking abnormalities during final rivet manufacturing. The hot spraying process forms a multi-layered composite material in the extruded wire: a low-hardness, easily machinable pure silver coating layer and an internal high-hardness, brittle AgSnO2 structure. This significantly reduces the fracture abnormalities that occur during subsequent hot drawing, improving the material yield.
Owner:ZHEJIANG FUDA ALLOY MATERIALS TECH CO LTD

A method for calculating the ultimate uplift bearing capacity of a hollow secondary grouting anchor rod

This invention belongs to the technical field of ultimate bearing capacity assessment for highway slope anchorage engineering. It provides a method for calculating the ultimate pull-out bearing capacity of hollow secondary grouting anchors, including the following steps: S100, obtaining the cross-sectional area lost at the anchor's opening location and the complete cross-sectional area before the opening; defining the damage factor; S200, determining the material density of the anchor and treating it as an equivalent cylinder of uniform wall thickness; S300, establishing the actual stress expression and the total damage factor expression for the ultimate tensile bearing capacity; S400, converting the actual stress expression for the ultimate tensile bearing capacity; S500, deriving the formula for the ratio of the tensile force of the complete anchor to the tensile force of the anchor with the opening. This invention can systematically evaluate the influence of different perforation diameters on the mechanical properties of the anchor, thus facilitating the scientific determination of the anchoring force of hollow secondary grouting anchors and providing support for the formation of standardized and scientific design methods and systems.
Owner:GUANGDONG HUALU TRANSPORTATION TECHNOLOGY CO LTD +2

Material density monitoring method and device, medium and program product

The invention discloses a material density monitoring method and device, a medium and a program product, and relates to the technical field of tobacco industry automation and process control. The material density monitoring method comprises the steps that the material temperature and the material density to be corrected of a cut tobacco making pipeline are obtained; calculating a material density compensation value according to the to-be-corrected density of the material, the material temperature of the cut tobacco making pipeline and the temperature compensation related parameters; and when it is determined that the material density is abnormal based on the material density compensation value and the density monitoring threshold value, generating early warning information. According to the technical scheme, the density of the added materials in the tobacco primary processing process can be accurately monitored in real time, material waste is avoided, and the labor cost is greatly saved.
Owner:HUBEI CHINA TOBACCO INDUSTRY CO LTD

Preparation method of low-interface reaction metal-based composite material based on powder solid-phase deposition

The invention relates to the technical field of metal-based composite material preparation and processing, in particular to a low-interface reaction metal-based composite material preparation method based on powder solid-phase deposition additive, which comprises the following steps: mixing nano or micron reinforced phase particles with metal matrix powder to form composite powder; then, friction heat between the rotating tool and the substrate / deposited layer serves as a unique external heat source, powder solid-phase deposition material adding is conducted under the condition that the temperature is lower than the melting point of the metal matrix, and contact type forced cooling is conducted on a deposition area in the process; the thickness of a composite material interface reaction layer is controllable by cooperatively controlling the rotating speed, the axial pressure, the radius of a shaft shoulder and the moving speed of a tool, and finally the thickness of the composite material interface reaction layer is smaller than or equal to 30 nm, the room-temperature tensile elongation at any position is larger than or equal to 3%, and the material density is larger than or equal to 99%. The density and plasticity index of the material are ensured, and the interface reaction between a reinforced phase and a matrix is reduced.
Owner:TIANMUSHAN LABORATORY

Device for detecting density of ardealite-based backfill material

The utility model belongs to the technical field of ardealite density detection, and particularly relates to an ardealite-based backfill material density detection device which comprises a density detector with a detection probe and a displayer. A connecting mechanism used for connection is arranged between the bottom of the sample cup and the density detector, one end of the detection probe penetrates and extends into the sample cup from bottom to top, the connecting mechanism comprises an external thread connector and an internal thread connector, the internal thread connector is installed at the bottom of the sample cup in a communicated mode, and the internal thread connector is connected with the density detector. According to the phosphogypsum density detection device, the connecting mechanism and the sample cup are additionally arranged, so that the sample cup is integrated on the density detector, at the moment, the detection probe is located in the sample cup, the detection probe is directly soaked in phosphogypsum slurry, and equipment can conveniently carry out density detection on the phosphogypsum density detection device.
Owner:CHINA CONSTRUCTION INDUSTRIAL & ENERGY ENGINEERING GROUP CO LTD

Carbon capture structured filler design and optimization method based on fluid topological optimization

The invention relates to the technical field of carbon dioxide capture, in particular to a carbon capture structured filler design and optimization method based on fluid topological optimization, which comprises the following steps: constructing a carbon capture reaction design domain geometric unit, taking a filler basic unit as a core, and setting a fluid inlet and outlet extension section, distinguishing a fluid domain, a solid domain and a transition state between the fluid domain and the solid domain through a continuous material density field, and defining boundary conditions such as a gravitational field matched with an actual absorption tower and adiabatic slippage-free boundary conditions; establishing a polynomial modified topological optimization multi-physics field coupling equation set, introducing a polynomial improved Darcy interpolation function to optimize fluid-solid interface characteristics, and meanwhile, improving numerical stability by combining a filtering method and a projection method; on the basis of the modeling solving platform, a global convergence moving asymptote method is adopted for iterative solving, and a carbon capture filler structure with a fine and complex flow channel is generated; the problems that traditional filler design depends on experience, the design freedom degree is low, and the optimization efficiency is limited can be solved.
Owner:SHANXI CLEAN ENERGY RES INST OF TSINGHUA UNIV +1

Cutting device for machining mechanical parts

A cutting device for machining mechanical parts, belonging to the field of parts cutting technology, addresses the problem that existing technologies may not effectively handle uneven material density, leading to vibrations during cutting and affecting cutting accuracy. The invention includes a cutting machine body with a drive disk assembly fixedly connected to it. A shearing disk assembly is coaxially arranged with the drive disk assembly and is drively connected to it. A torque sensor is fixedly connected to the cutting machine body. This invention uses the torque sensor to monitor torque fluctuations in the drive disk assembly in real time. Combined with the linkage between the hydraulic cooling drive assembly and the radial movement assembly, the radial position of the shearing disk assembly is automatically adjusted when cutting to different density critical areas, effectively reducing cutting vibrations or tool wear caused by uneven material density, and improving cutting accuracy and stability.
Owner:SHENZHEN RUIGE ELECTRONICS CO LTD

Vacuum brick packaging system automatically adapting to changes in material density

The application discloses a kind of automatic adaptation material density change's vacuum brick type packaging system, it includes quantitative weighing device, film roll bag device, brick type cavity device, PLC system, the weighing hopper of quantitative weighing device is equipped with material level detection switch, material level detection switch detects the material level height value in weighing hopper, the film roll bag device includes the film feeding drum with rotary encoder, the brick type cavity device includes cavity bottom plate, the lower end middle part of cavity bottom plate is connected with the upper end of air bag pneumatic cylinder, the lower end of air bag pneumatic cylinder is connected with cavity base, air bag pneumatic cylinder is connected with electromagnetic reversing valve, the lower end both sides of cavity bottom plate is also equipped with vibrator, the side plate upper end of the brick type cavity device is equipped with material detection switch, the PLC system is coordinated control to all devices in packaging system.The application can also make material surface height, bag mouth height keep consistency when material bulk density changes, improve the production efficiency and sealing property of vacuum sealing process.
Owner:BOSHI (SUZHOU) INTELLIGENT TECH CO LTD

Preparation method and application of PEEK composite material

The invention relates to the technical field of composite material manufacturing, in particular to a preparation method and application of a PEEK composite material. The preparation method of the PEEK composite material comprises the following steps: carrying out high-temperature oxidation and silane coupling agent impregnation pretreatment on short carbon fibers, and meanwhile, carrying out dry premixing on polyimide microspheres and nano silicon dioxide; feeding and stirring step by step according to the proportion to form a premix with uniformly distributed components; carbon fibers are supplemented in a lateral feeding mode, and melt blending and granulation are completed in cooperation with precise temperature control; and finally, drying the composite material particles, and carrying out injection molding or compression molding to obtain a finished product. The prepared PEEK composite material has excellent comprehensive performance: the material density is extremely low, and the specific strength is excellent; a multi-scale enhanced network is constructed in the composite material, high rigidity and high toughness are both considered, and the composite material has excellent impact resistance; the composite material has a self-lubricating property and outstanding wear resistance and fatigue resistance.
Owner:SHANGHAI HONGANG NEW MATERIAL TECH CO LTD

A truss size optimization design method based on minimum cut set correlation

The application discloses a truss size optimization design method based on minimum cut set correlation. The method comprises the following steps: establishing a balance matrix of the truss structure, using a zero space method to obtain a minimum cut set database of failure modes; constructing a joint failure model of the database, and then obtaining a failure probability under the consistency of the cut set edge probability space and establishing a reliability constraint optimization model; inputting the material density and length of each rod of the truss structure into the model, and outputting the optimized total weight and the cross-sectional area of each rod after processing, so as to perform size optimization design of the truss structure. The application solves the problems of failure mode combination explosion, insufficient correlation modeling and missing reliability constraints in the reliability analysis of the truss structure, can significantly reduce the complexity of the truss size optimization design, improve the structure failure probability evaluation precision, realize efficient and accurate system reliability evaluation and lightweight design, and has good computability and engineering applicability while ensuring the precision.
Owner:ZHEJIANG UNIV OF TECH

Composite material raft frame integral forming method and mold

PendingCN121928794ADomestic articlesVacuum assistedNatural fiber
The invention discloses a composite material raft frame integral forming method and a mold in the technical field of ship structure design. The composite material raft frame integral forming method comprises the steps of prepreg blanking, mold pretreatment, layered gradual paving, hot-pressing curing and post-treatment. And through modular prefabricated body construction and a differentiated layering strategy, integral forming of continuous transition of fibers is achieved, and the interface failure risk of a traditional glue joint structure is eliminated. The mold adopts a detachable silica gel steel core design and is combined with a vacuum-assisted cold pressing process, so that the compactness and the dimensional precision of the material are ensured. By adopting the synergistic effect of a partition differentiation laying strategy and a bionic reinforcing framework, a discrete structure originally depending on glue joint is converted into an integral bearing frame with fibers naturally transited, the geometric mutation risk at the joint of the rib plate and the lower plate is eliminated, and through a closed grid structure formed by extending the laying layer through the prepreg, the strength of the rib plate and the lower plate is improved. And a load transmission path is converted from shear dependence of an adhesive layer to fiber-dominated axial continuous transmission.
Owner:JIANGSU XINYANG NEW MATERIALS CO LTD

Optimization design method for material density, thickness and angle of conical shaped charge liner energy-gathered warhead based on BP neural network and conical shaped charge liner energy-gathered warhead

The invention provides a conical shaped charge liner energy-gathered warhead material density, thickness and angle optimization design method based on a BP neural network and a conical shaped charge liner energy-gathered warhead. The method comprises the steps that core components and characteristics of a conical shaped charge liner are determined, the shaped charge liner is located at the front end of a main charge, and the shaped charge liner and the main charge are coaxially arranged; the cone top of the shaped charge faces the direction away from the main charge, the conical surface makes contact with the main charge to form an energy gathering structure symmetrical to the central axis, and the detonating device is arranged in the center of the end, away from the shaped charge, of the main charge to ensure that detonation waves are symmetrically spread from the end to the shaped charge; acquiring data of jet velocity, penetration depth, jet head shape and jet tail dispersion degree under different shaped charge liner parameter combinations through a numerical simulation tool; based on the obtained data, a BP neural network model is used for optimization, the optimal parameter combination of the shaped charge liner is screened out, the jet velocity, stability and penetration depth are precisely regulated and controlled, and the requirements of different damage scenes are met.
Owner:DALIAN UNIV OF TECH

Wooden door structural strength simulation analysis and optimization method and system

The invention provides a wooden door structural strength simulation analysis and optimization method and system. According to the method, a defect distribution diagram is generated by combining wavelet multi-resolution analysis and wooden door pore data, a parameterized model is established in combination with finite element simulation, and a stress propagation path is extracted through transient dynamic analysis after a vibration load is applied; identifying stress space aggregation points through Fourier frequency domain decomposition, and synchronously establishing a material expansion and contraction model under temperature and humidity circulation; the expansion and shrinkage deformation quantity and the stress gathering points are superposed to generate composite load weak area distribution, a geometric model is reconstructed based on variable density topological optimization, and the material density is adjusted according to a defect graph and a weak area; and finally, optimizing local rigidity configuration, so that the inherent frequency of the door body avoids a switch excitation frequency band, and obtaining a high-reliability residence wooden door structure. The vibration fatigue resistance and environmental deformation resistance of the wooden door are remarkably improved, the service life is prolonged, and noise is reduced.
Owner:浙江家丽屋美门业有限公司

A process for producing a t250 seamless steel pipe

ActiveCN120796825BCrazingPipe
This invention discloses a production process for T250 seamless steel pipes. The steel composition for T250 seamless steel pipes, by mass percentage, is: C: ≤0.007%, Si: ≤0.12%, Mn: ≤0.13%, P: ≤0.01%, S: ≤0.007%, Ni: 17.8~20.2%, Cr: ≤0.60%, Co: ≤0.60%, Mo: 2.65~3.35%, Ti: 1.1~1.7%, Al: 0.03~0.17%, Cu: ≤0.60%, O: ≤0.0 The steel pipe has the following specifications: 0.25% N, ≤0.0025% N, hardness ≤34HRC, grain size ≥5, tensile strength ≥1760MPa, yield strength ≥1660MPa (Rp0.2), elongation ≥6.0%, reduction of area ≥45.0%, average full-size impact energy at room temperature longitudinal Charpy V-notch ≥14J, outer diameter φ114~φ325mm, and wall thickness 15mm~55mm. The manufacturing process includes billet preparation, forging, solution treatment of the forged bar, forging processing, extrusion molding, solution heat treatment, and aging heat treatment. This invention improves metal purity, refines bar grains, reduces component segregation, enhances material density, and stabilizes mechanical properties; eliminates shrinkage cavities and cracks, improving finished product quality; and enables seamless steel to maintain stable performance in high-temperature and corrosive environments (such as marine engineering), suitable for extreme working conditions, and applicable to the production of high-performance seamless steel pipes.
Owner:SHENYANG BOHANG NEW MATERIAL TECH CO LTD +1

A load distribution optimization method and system for lattice skeleton design

The application relates to the technical field of vehicle engineering, and particularly discloses a load distribution optimization method and system for a lattice frame design, which comprises the following steps: firstly, an initial three-dimensional design domain of the lattice frame is established, and a composite dynamic load working condition obtained based on multi-body dynamics simulation is applied; then, a material density distribution cloud picture is obtained through macroscopic topological optimization, a main force transmission path is identified and extracted, and the design domain is divided into a core bearing area, a transition area and a non-key area; in the non-key area and the transition area, a point array structure with gradient material properties is designed according to a stress state, and continuous change of the material properties is realized by adjusting the point array type, arrangement direction and control parameters; finally, performance verification and parameter iterative optimization are carried out on the overall structure containing the core bearing area and the point array filling area.
Owner:JIANGXI JIANGLING SPECIAL VEHICLE FACTORY

Method for preparing high-hardness high-wear-resistance magnesium-based composite material

ActiveCN120619320BSolve the problem of extrusion difficultieshigh hardnessMagnesium matrix compositeHardness
The application discloses a preparation method of high-hardness and high-wear-resistance magnesium-based composite material, which comprises the following steps: preparing materials, remelting, casting, and extruding; AZ91 alloy semi-solid-state temperature is added with B4C for stirring and cooling to form a casting rod for standby; an AZ91 alloy solution is prepared; a mold with a proper diameter is selected, the standby casting rod is placed at a center position of the mold, the AZ91 alloy solution is poured into the mold, meanwhile, the mold is placed on a vibration platform to continuously vibrate until the solution completely solidifies, so that the magnesium-based composite material is formed; and the magnesium-based composite material after complete solidification is subjected to heat treatment and cooling, and then is heated again to be extruded and deformed. The application effectively solves the extrusion difficulty of the existing composite material, greatly improves the hardness of the alloy layer, significantly reduces internal defects, improves the material density, uniformly disperses B4C particles in the matrix, avoids local agglomeration, improves the hardness and wear resistance of the composite material, and effectively reduces the cracking risk in the extrusion process.
Owner:山西银光华盛镁业股份有限公司 +1

Belt feed material flow monitoring method and system

PendingCN122636706APoint cloudMaterial density
The embodiment of the application discloses a kind of belt material flow monitoring method and system, the method comprises: step S1: real-time synchronous acquisition of the left and right views of material on the belt;Step S2: pixel-level disparity map is calculated;Step S3: disparity map is converted into depth information, and the three-dimensional point cloud of belt material is restored;Step S4: again ROI segmentation is carried out to belt area, and belt background is eliminated;Step S5: the cross-sectional profile of material is extracted;Step S6: the cross-sectional area of material is calculated according to cross-sectional profile;Step S7: the cross-sectional area of continuous sampling is integrated, and the volume of material on the belt is obtained, combined with material density, and instantaneous flow and cumulative material quantity are output in real time.The application uses 3D binocular vision non-contact detection, and still maintains high-precision measurement under the condition of belt speed change and uneven material, eliminates the calculation error caused by speed fluctuation, realizes non-contact, high-precision, anti-interference, easy deployment, and collaborative material flow monitoring.
Owner:XIAN QUANTUM INTELLIGENT TECH CO LTD

Forging process of iron teeth for rubber track

The invention discloses a forging process of iron teeth for a rubber track, and aims to provide a more efficient and more reliable forging process of the iron teeth for the rubber track, and the forging process is characterized by comprising the following steps: S1, blank design: drawing a three-dimensional model of the iron teeth, and determining the machining allowance to be 3-5mm according to the structural complexity of the iron teeth, calculating the volume of the forge piece according to the working allowance, multiplying the volume of the forge piece by the material density of the forge piece, selecting 45 # high-quality carbon steel or 40Cr alloy steel with the density of 7.85 g / cm < 3 >, calculating to obtain the weight of the required forging material, and reserving 1-3% of burning loss amount for the weight of the forging material; the blank is manufactured through an air hammer blank manufacturing process, the forging temperature is controlled to be 1100-1160 DEG C, the number of times of forging is two, the weight deviation of the blank is controlled to be within + / -2% through forging adjustment of an air hammer, and the matching degree of the sectional size of the blank and the size of an inlet of a cavity of a primary forging die is larger than or equal to 90%; s3, designing a forging die; s4, a forging process; s5, heat treatment; s6, quality detection; and S7, machining is completed.
Owner:ZHEJIANG FORGING CO LTD

Water outlet valve body casting mold and forming process

The application provides a water outlet valve body casting mold and a forming process. The main body part and the plane part can be integrally formed in the pouring process through the forming mold, and the problems of poor compatibility, easy deformation, thermal cracks, and porosity in the split welding of the prior art are improved. In addition, the product thickness is adjusted by changing the internal size of the valve body through hot extrusion forming, which provides technical support for producing ultra-thin products with a thickness of less than 8 mm. At the same time, high material density is realized through high-temperature extrusion, so that the strength and plasticity of the valve body are higher than those of the valve body manufactured by split welding, and the anti-freezing cracking ability and surface quality of the valve body in a low-temperature environment are improved.
Owner:JOMOO KITCHEN & BATHROOM