149 results about "Gradient material" patented technology

An embodiment of a valve seat for a pumping assembly includes a body having a bore. In addition, the valve seat includes an embedded structure embedded in the body so as to define, at least partially, a strike face of the valve seat. The strike face extends circumferentially about the bore, and the embedded structure includes a gradient material structure having a first material, a second material spaced from the first material, and a compositional transition region between the first material and the second material.

A valve seat for a pumping assembly. The valve seat includes a body including a gradient material structure that defines a strike face for the valve seat. The gradient material structure has a first material, a second material spaced from the first material, and a smooth compositional transition between the first material and the second material. In addition, the valve seat includes a bore extending through the body.

The invention belongs to the technical field of 3D printing, and particularly relates to a 3D printing control method based on multi-material gradient transition, which comprises the steps of model processing, multi-material distribution, path planning, dynamic parameter control, online monitoring and feedback optimization. According to the method, through dynamic mixing of a nonlinear gradient function and multiple materials, limitation of traditional discrete material switching is broken through, continuous smooth transition of material attributes is achieved, printing parameters are dynamically adjusted, and the forming consistency of gradient materials under complex working conditions is remarkably improved; local strengthening is carried out according to the thermodynamic property difference of a multi-material interface, interface embrittlement caused by a traditional single process is avoided, the curing degree is detected in real time through a spectrum sensor, the problem that the curing degree of a traditional light curing process is uncontrollable is solved by combining partitioned UV light intensity adjustment and control, and precise gradient forming of a soft and hard alternate structure is achieved.

A valve seat for a pumping assembly. The valve seat includes a body including a gradient material structure that defines a strike face for the valve seat. The gradient material structure has a first material, a second material spaced from the first material, and a smooth compositional transition between the first material and the second material. In addition, the valve seat includes a bore extending through the body.

The invention discloses a quality detection method in a functionally graded material preparation process, and relates to the technical field of functionally graded materials.The quality detection method comprises the following steps that the temperature of a green body in the functionally graded material preparation process is collected, and green body temperature distribution data is obtained; performing real-time thickness measurement on the green body according to the green body temperature distribution data to obtain a green body thickness change curve; identifying an abnormal fluctuation section in the thickness change curve of the green body, and carrying out phase detection on a physical region with the abnormal fluctuation section of the green body to obtain regional phase composition data; performing internal defect scanning on the green body according to the regional phase composition data to obtain an internal defect map of the green body; performing quality evaluation on the green body based on the green body internal defect map to obtain a quality grade judgment result; according to the method, the ultrasonic flaw detection scanning range is guided based on the phase abnormal region, and high-resolution internal flaw detection can be performed on the high-risk region of the functionally graded material in a targeted manner.

A valve seat for a pumping assembly. The valve seat includes a body including a gradient material structure that defines a strike face for the valve seat. The gradient material structure has a first material, a second material spaced from the first material, and a smooth compositional transition between the first material and the second material. In addition, the valve seat includes a bore extending through the body.

The invention is suitable for the technical field of hovercar control, and provides a thermal-vibration-weight collaborative optimization method of a high-power-density hovercar controller, and the method comprises the steps: constructing a three-dimensional housing structure based on fractal mechanics, achieving 35-45% of weight reduction through bionic design, and remarkably reducing the weight while guaranteeing the structural strength; thermal management, electromagnetic compatibility and vibration suppression collaborative optimization layout is established, a high-heating-power module is arranged near a heat dissipation air opening, and a sensitive control unit is arranged in a center damping area of a shell; a gradient material distribution scheme is adopted, a high-heat-conduction composite material is configured in a high-heat-flow area, and a high-damping material is adopted in a vibration sensitive area. Under the high-power working condition, the heat dissipation performance of the controller is improved, vibration transmission is reduced, the overall weight is reduced, and high-reliability control hardware support is provided for the hovercar.

The invention relates to the technical field of building construction, in particular to a foundation construction material and a dynamic compaction construction method.The construction method comprises the following steps that S1, an early-stage preparation stage is conducted; s2, a trial compaction and parameter optimization stage; s3, a main body construction stage; s4, a multi-field coupling maintenance stage; s5, a foundation quality detection stage; and S6, an acceptance and filing stage. Through intelligent sensing and dynamic parameter regulation and control, self-adaptive optimization of the tamping process is achieved, over-tamping or under-tamping is avoided, and the foundation bearing capacity is improved by 15%-20%; the layered filling design of the gradient material is matched with different depth mechanical requirements, the grading continuity coefficient is larger than or equal to 0.5, and the compactness of the pier body is improved by 25% or above; an innovative Q value evaluation formula integrates multi-dimensional parameters, the detection accuracy rate reaches 90% or above, and the rework rate is remarkably reduced; the maintenance period is shortened to 7 days through the multi-field coupling maintenance technology, and the construction efficiency is improved by 50%; and the material cost is reduced by 30% by recycling the construction waste, and the method has economical efficiency and environmental protection performance and is suitable for various complex foundation treatment sites.

The invention relates to preparation of a tungsten-containing stainless steel gradient material. The method mainly comprises the following steps: obtaining mixed powder which is composed of 316L stainless steel powder and tungsten powder and has a plurality of different weight ratios, and applying the mixed powder to a forming substrate layer by layer according to a gradient change sequence to form powder layers, and controlling a laser beam to perform selective melting matched with the process parameters on the powder layer along a preset scanning path so as to form a consolidated gradient material part. Smooth change of the density gradient is achieved by adjusting the tungsten content, formation of cracks and brittle compounds in a traditional printing technology is avoided, the density of the gradient material can be accurately adjusted and controlled within a wider range, and the method is particularly suitable for the application field with the requirement for high density and the complex internal structure.

The invention provides a functionally graded material modeling and path planning method based on additive manufacturing, and relates to the technical field of functionally graded material additive manufacturing. The method comprises the following steps: firstly, slicing a three-dimensional space model of a part to obtain geometric contour information of a model slice layer; taking the geometric contour of the layered model slice as a constraint, and carrying out triangulation processing on the two-dimensional polygon slice layer to obtain a two-dimensional triangular mesh model; correlating the material information of the customized workpiece with the geometric information by using a curved surface grid thermal diffusion model algorithm, namely, designing a single or multiple heat source points or heat source lines, and performing gradient diffusion in a grid to generate a scalar field containing material gradient distribution information; extracting a contour line of a specific scalar value to perform region division on the slice model to form a plurality of gradient feature sub-regions; and finally, according to the contour features of different sub-regions, a corresponding path planning strategy is adopted to optimize the path, an optimal path is generated, and accurate forming of the functionally graded material is achieved.

The invention relates to the technical field of additive manufacturing, in particular to an additive manufacturing low-stress high-entropy alloy design system and method based on lattice mismatch, which are used for effectively reducing interface stress of gradient materials, and the method comprises the following steps: analyzing a matrix crystal structure, and determining a high-entropy alloy crystal structure type consistent with the matrix crystal structure; based on a high-entropy alloy crystal structure, a high-entropy alloy virtual lattice approximate structure model is established; performing structure geometric optimization on the model to obtain a high-entropy alloy lattice constant under a stable structure; according to the obtained lattice constants, the proportion of all elements of the high-entropy alloy is adjusted by comparing the lattice constants of the base body, and the redesigned high-entropy alloy is calculated till the lattice mismatch degree of the high-entropy alloy and the base body is low; and gradient design is conducted on the designed high-entropy alloy with the low lattice mismatch degree and the base body, and the design result of the low lattice mismatch degree and the low interface stress of the additive manufacturing high-entropy alloy gradient material is obtained.

The invention provides a cooling capacity-increasing overhead conductor, a dynamic current-carrying capacity determination method, a medium and equipment, and relates to the technical field of power transmission lines, the method is characterized in that the overhead conductor adopts a three-layer composite structure, the outer layer is a passive cooling coating, the thickness is 50-200 [mu] m, the surface is provided with a micro-nano structure for enhancing mid-infrared radiation, the emissivity is greater than or equal to 0.92, and the dynamic current-carrying capacity is greater than or equal to 0.92; the contact angle is greater than 120 degrees through hydrophobic modification treatment; the middle layer is a high-conductivity aluminum alloy conductor layer, and the inner layer is a high-strength galvanized steel core; a directional heat conduction path is formed between the coating and the conductor layer through a gradient heat conduction material, and the heat conductivity coefficient of the gradient material is gradually increased from the coating to the conductor layer; the coating mode of the coating is axial segmented coating or net-shaped coating. According to the overhead conductor, the current-carrying capacity of the line can be effectively improved, the power transmission design of the line is optimized, and the quantitative index of the capacity increasing effect can be obtained through the dynamic current-carrying capacity determination method.

The invention discloses a high-wear-resistance impact-resistance gradient material and a follow-up ultrasonic-assisted additive manufacturing method thereof, and belongs to the technical field of additive manufacturing. According to the method, the gradient material is prepared through a laser three-dimensional forming technology, and raw materials comprise a soft material, hard material metal and hard ceramic powder. Along with the increase of the printing height, the specific gravity of the soft material is continuously reduced, the specific gravity of the hard material is continuously increased until the specific gravity of the hard material is 100%, and the surface layer of the gradient material is a hard ceramic particle reinforced high-hardness layer. In the gradient material laser three-dimensional forming process, follow-up ultrasonic vibration assistance is adopted, convection of liquid soft and hard materials is promoted, a metal molten pool is fully mixed, element segregation and brittle phase precipitation are reduced, hard ceramic particles are promoted to be evenly distributed in the molten pool, and the dispersion strengthening effect is enhanced.

The invention relates to the technical field of shoes, and discloses a foot self-adaptive support adjusting method based on a biomechanical model, which comprises the following steps: S1, foot biomechanical modeling: acquiring foot geometric data of a user through three-dimensional scanning, acquiring dynamic load parameters in combination with gait analysis, and constructing a personalized foot finite element model; s2, stress distribution calculation: sampling according to 0-100% phase intervals of 10% in a gait cycle; s3, material gradient design: determining a gradient material rigidity mapping relation according to Pmax distribution; and S4, realizing a self-adaptive structure: constructing a gradient sole structure through 3D printing. A high-shear-force area is judged through double threshold values, and a pressure gradient self-adaptive non-uniform honeycomb structure and configuration classification are arranged in the area, so that local deformation is dynamically regulated and controlled in a pedaling and stretching period and a landing period, and the effects of reducing a stress peak value of the high-shear area and reducing friction heat accumulation are achieved.

The invention discloses a laser additive manufacturing method of a 316L + xCu functional gradient composite material, which relates to the field of gradient material laser additive manufacturing, and comprises the following steps: preparing four gradient composite materials, namely a first gradient composite material, a second gradient composite material, a third gradient composite material and a fourth gradient composite material, from gas atomized 316L powder and pure copper powder according to different proportions, wherein the contents of the pure copper powder in the four gradient materials are gradually increased in sequence, the content of the pure copper powder in the first gradient composite material is 0, and the content of the pure copper powder in the fourth gradient composite material is less than 10wt%; the 316L stainless steel substrate is pretreated; laser additive manufacturing equipment is adopted, and the four gradient materials are sequentially deposited layer by layer on a 316L stainless steel substrate according to preset process parameters; thus, a gradually-transitioned microstructure is presented in the deposition direction, the bonding strength between every two adjacent gradient layers is high, and good heat conductivity and corrosion resistance are achieved; and the operation is simple, the production period is short, and the degree of freedom of component design is improved.

A system for dispensing a set of density gradients. The system calculates a dispense queue including volumes of gradient materials for dispensing the set of density gradients. The set of density gradients including at least a first density gradient and a second density gradient for dispensing into at least a first container and a second container, respectively. The system dispenses the first density gradient into the first container by dispensing one or more sections composed of mixtures of the gradient materials through a probe positioned to have a distal end at a bottom of the first container. The system purges the probe by displacing a mixture of gradient materials used for dispensing a last section of the first density gradient with a material included in the dispense queue before the dispense of the first density gradient is completed.

The invention provides a gradient material accurate forming-oriented closed-loop control friction solid-phase additive manufacturing method and system. The invention discloses a closed-loop control friction solid-phase additive manufacturing method for gradient material accurate forming. The method comprises the following steps that S1, a metal substrate is prepared, and a reference digital twin model is loaded; s2, depositing a first metal layer by adopting a friction solid-phase additive process; s3, at a preset interval of completing one-layer deposition or multi-layer deposition, the current actually-measured forming surface of the workpiece is scanned to obtain three-dimensional point cloud data of the workpiece; s4, generating a three-dimensional shape deviation graph containing positive and negative deviation values of each coordinate point; s5, generating a compensatory manufacturing scheme for depositing a next layer; s6, the friction solid-phase additive manufacturing equipment is driven to execute a compensatory manufacturing scheme to deposit a next layer; and S7, the steps S3-S6 are repeatedly executed. According to the method, the component precision of the gradient material component can be maintained while morphology compensation is carried out.

The invention discloses a high-density packaged TGV gradient material filling interconnection structure and a filling method thereof, and relates to the technical field of semiconductor packaging. The TGV gradient material filling interconnection structure comprises a glass through hole located in a glass substrate, and the glass through hole is filled with a conductive metal body. A micro-nano anchor structure layer, a molecular bridging layer and a conductive metal seed layer are sequentially arranged between the inner wall of the glass through hole and the conductive metal main body, and a metal bridging structure is arranged in the middle of the interior of the glass through hole; the micro-nano anchor structure layer is located on the surface of the inner wall of the glass through hole and is of a concave-convex dot matrix arrangement structure. According to the method, the micro-nano anchor nail structure and the molecular bridging layer are formed on the surface of the glass, so that the copper-glass interface bonding strength is remarkably improved, and void-free electroplating filling of the TGV through hole with the depth-diameter ratio larger than or equal to 10: 1 is achieved. The glass bridge is embedded in the glass substrate, ultra-high-density interconnection with local interconnection line width / line distance smaller than or equal to 1 m is achieved, and the 2.5 D integration requirement of more than 16 silicon-based core particles is met.

The invention belongs to the technical field of metallurgical equipment remanufacturing, and particularly relates to a gradient functionalized high-toughness shear blade material based on double-laser melting forging time sequence coupling and a preparation method thereof. The gradient functionalized high-toughness shear blade material is prepared from the following components in percentage by mass: 0.6 percent to 0.7 percent of C, 4.5 percent to 5.5 percent of Cr, 1.8 percent to 2.2 percent of W, 1.2 percent to 1.5 percent of Mo, 0.8 percent to 1.0 percent of V, 2.8 percent to 3.2 percent of Ti, 0.008 percent to 0.015 percent of B, 0.02 percent to 0.05 percent of Ce and the balance of Fe and inevitable impurity elements. Through a three-in-one coordinated regulation and control system of gradient material design, double-laser time sequence coupling and in-situ interface strengthening, the technical bottleneck that the hardness and the toughness of a shear blade material cannot be obtained at the same time is broken through, and the problems of tipping failure, insufficient fatigue life and the like of a traditional disc shear blade material during service are solved.

The invention relates to the field of material thermal expansion testing, and provides a thermal expansion measuring device and method for gradient materials, and the device comprises an array probe module, a machine vision system, a temperature control system, a driving mechanism, a control module and a housing. The probe array module comprises probes arranged at equal intervals, and the bottom ends of the probes are in direct contact with the surface of a sample; the driving mechanism drives the probe array to scan along a sample component gradient direction; the machine vision system is used for collecting a probe top end image and combining an image processing algorithm to achieve full-area analysis of gradient components. Compared with existing equipment, the thermal expansion behavior of samples such as component gradient materials and composite materials can be represented, the thermal expansion behavior characterization device is particularly suitable for thermal expansion behavior characterization of key components such as aerospace gradient coatings and nuclear reactor cladding materials, and a reliable testing means is provided for design optimization of functionally gradient materials.

A method for realizing any adjustable Poisson's ratio of an amorphous system based on machine learning comprises the following steps: constructing a two-dimensional amorphous network model which comprises nodes and connections between the nodes; connection in the two-dimensional amorphous network model is optimized and regulated through a machine learning method, a global optimization network is generated, an optimized data set is fed back to an actual network, and continuous regulation of the Poisson ratio v of the actual two-dimensional amorphous network system from-0.9 to 0.9 is achieved. An intelligent optimization machine learning algorithm is utilized, and-0.9 lt;-0.9 lt is comprehensively and effectively realized in various two-dimensional amorphous systems; vlt; the adjustment of 0.9 is close to-1lt of a two-dimensional isotropic system; vlt; 1 is a theoretical limit. In addition, the invention also finds that the system v is determined by a few low-frequency intrinsic modes. By implementing machine learning design, the material with a series of positive and negative v values is manufactured, and the gradient material based on the Poisson's ratio is further realized. The method contributes to the actual progress of the design of the auxetic material.

The invention discloses a preparation method of a functionally graded material without prefabricated powder addition, which specifically comprises the following steps: step 1, pretreatment: cutting and milling a test block workpiece, processing the test block workpiece into a fixed size and shape, and then cleaning the processed workpiece by using an ultrasonic cleaning machine; step 2, preparing a sample, and polishing the test block by using a metallographic polishing machine until the test block is polished; 3, electron beam treatment, wherein electron beams are adopted for conducting multiple times of irradiation treatment on the sample. And 4, tissue and performance testing is conducted, specifically, the microstructure is observed through a scanning electron microscope, and the mechanical performance of the functionally graded material is detected through a Vickers hardness tester. The method disclosed by the invention can be used for quickly synthesizing the functionally graded material without prefabricated addition, and has an extremely good application scene.

The invention discloses a nano-particle filling axial gradient material structure optimization method, which comprises the following steps of: constructing equivalent material parameters according to agglomeration quantity parameters of a nano-particle filling axial gradient material; a perturbation amount is set according to the agglomeration amount parameter, and a vibration control equation of the axial gradient beam is constructed according to the equivalent material parameter and the perturbation amount; perturbation expansion is carried out on the vibration control equation; solving according to the perturbation expanded vibration control equation to obtain a mapping relation between perturbation amount and frequency; and acquiring a design frequency, and calculating the design frequency according to a mapping relation between perturbation and frequency to obtain corresponding agglomeration parameter data of the nano-particle filled axial gradient material, namely a structure optimization result. According to the method, the mathematical corresponding relation between the agglomeration amount parameter and the vibration frequency can be established, so that quantitative analysis, reverse design and structural optimization of the structure of the nano-particle filling axial gradient material are facilitated.

The present invention relates to the field of 3D printing, and particularly to a high-efficiency 3D printing device and method for gradient materials based on a spiral flow channel, which are used to solve the technical problem that in traditional 3D printing technologies, it is impossible to achieve a complex gradient distribution of the particle size of reinforcing particles in composite materials or the pore size of porous materials. The printing device includes an additive manufacturing forming platform, a spiral separation and assembly system, a material supply system, and a computer control system. Through the inertial microfluidic particle manipulation mechanism of the spiral separation channel in the spiral separation and assembly system, combined with the design combination of the digital assembly extrusion head and the optimization of printing process parameters, a complex gradient distribution of reinforcing particles or sacrificial template particles in the matrix material can be achieved, which has great application potential in the fields of materials and engineering.

The invention discloses an artificial shoulder joint prosthesis design method and system, and the method comprises the steps: collecting the motion trail and muscle activation state of a shoulder joint in different motion modes, separating the feature frequency and amplitude of the shoulder joint motion, and extracting a dynamic motion feature set of the shoulder joint; inputting the dynamic motion feature set into a contact mechanical model based on a discrete element method, and simulating contact force and friction behaviors between the shoulder joint prosthesis and the skeleton to obtain contact mechanical characteristics of the prosthesis and the skeleton; and according to the contact mechanical characteristics, generating an initial structure of the prosthesis by using a topological optimization algorithm based on a generative adversarial network, generating a prosthesis topological structure with gradient material distribution, and obtaining an optimized prosthesis design scheme. By utilizing the embodiment of the invention, a prosthesis design scheme with gradient material distribution can be generated, the weight of the prosthesis is reduced, and the strength and durability of the prosthesis are enhanced.

The invention discloses an assembly type flexible connection shock-resistant and anti-seismic protection device with a gradient coupling layer, the assembly type flexible connection shock-resistant and anti-seismic protection device comprises an inner side anti-seismic layer, the gradient coupling layer and an outer layer shock-resistant layer, the inner side anti-seismic layer comprises a foundation bottom plate, a flange plate, a first corrugated plate module and a second corrugated plate module, and the flange plate is located above the foundation bottom plate. The gradient coupling layer comprises first coupling layer modules and second coupling layer modules, and the four first coupling layer modules are adjacently arranged on the sides, away from the concrete square column, of the four inner-layer buffer plates correspondingly. The two ends of the second coupling layer module are fixedly connected with the corresponding ends of the two adjacent first coupling layer modules in an inserted mode respectively, and each first coupling layer module is fixedly connected with the corresponding inner layer buffer plate through a memory alloy connecting assembly. And the outer anti-impact layer is arranged on the periphery of the gradient coupling layer. The gradient material layers are used for dissipating impact energy step by step, brittle failure caused by energy superposition is avoided, an energy transfer path is optimized, interface stress concentration is reduced, and stability under multi-disaster loads is improved.

This invention discloses a multi-mode processing method for friction stir deposition modeling driven by cascaded electric spindles. Based on a cascaded electric spindle-driven friction stir deposition modeling die head, the die head includes a screw shaft, a first electric spindle, and a second electric spindle that drives the screw shaft to rotate; a material conveying assembly including a storage box cover and a storage cavity formed by a specific inlet and a specific first outlet; and a stirring extrusion tool, wherein the first electric spindle includes a first hollow mandrel. This invention employs a compact coaxial cascaded electric spindle design, integrating the force transmission, heat transfer, and material transfer functions of the innovative hollow electric spindle into one unit, exhibiting modular characteristics. This overcomes the current additive manufacturing process where granular materials cannot be processed using a stirring tool in a coaxial friction stir process. Based on a circumferentially distributed multi-material conveying assembly design within the electric spindle assembly, this invention features material openness, enabling friction stir deposition modeling of multiple materials or gradient materials.

The invention relates to the technical field of selenium drum circulation, and particularly discloses a selenium drum recycling and replacing system and a control method.The method comprises the steps that firstly, quantitative characterization of subsurface defects and local mechanical properties is conducted on waste metal core base materials through microwave resonance and nanoindentation multi-source fusion detection, and a base material state quantitative data set is generated; performing multi-physical field transient simulation by taking the data set and target coating parameters as input, and predicting an interface residual stress score in a regeneration process; based on a prediction result, reversely solving a dynamic temperature control sequence and gradient material matching scheme; in a vacuum coating environment, active stress compensation coating is realized, transient thermal excitation modal testing is performed on the regenerated toner cartridge, high-frequency dynamic characteristics of the regenerated toner cartridge are extracted and compared with a simulation predicted value, simulation model parameters are optimized according to deviation data feedback, closed-loop control is formed, and the interface bonding strength and long-term imaging reliability of the regenerated toner cartridge are improved.

An arc wire feeding additive manufacturing method for a 321 stainless steel tissue gradient material, which relates to the field of additive manufacturing. The purpose of the present invention is to address the problems of complex processes, high costs, low deposition efficiency, easy contamination, and limited forming size existing in the preparation process of existing tissue gradient materials. The present invention proposes to control the recrystallization degree of different deposition positions by matching different ultrasonic impact and arc wire feeding additive manufacturing process parameters, and then achieve the purpose of tissue structure gradient transition, so as to prepare a metal FGM with a tissue structure gradient in this way. The present invention can achieve a relatively continuous gradient transition of the tissue structure and function gradient material of large and complex structures, achieving the effects of improving deposition efficiency, simplifying the process flow, and reducing manufacturing costs.

The invention discloses an isogeometric transient dynamics topological optimization method and system of a functional gradient plate structure, and belongs to the field of topological optimization design of functional gradient structures. According to the method, the problems of collaborative optimization of the gradient direction in the gradient material plane and the multi-material structure topology under the transient load effect and the like are solved. According to the technical key points, an isogeometric transient dynamics finite element analysis model of the functional gradient plate structure is constructed based on a reduced Gaussian integral method; constructing a smooth projection scheme and a material interpolation scheme of design variables of the functional gradient plate structure, and providing a transient dynamic topological optimization model of the functional gradient plate structure by taking the density of a control point and the volume fraction of a strong material attached to a plate unit as the design variables and the minimization of dynamic flexibility as a target; constructing a time domain adjoint equation of the topological optimization model, and obtaining sensitivity information of the target function; and finally, obtaining the optimal anti-vibration design of the functional gradient plate structure convenient for engineering application. The device is used for structural light-weight vibration reduction design of large engineering equipment under the strong vibration working condition.