2839 results about "3d printed" patented technology

Provided are a quantification method for microscopic cracks inside 3D printed concrete and a system thereof. Before measuring the microscopic crack images according to relevant standards, firstly, a denoising network, improved attention-guided denoising neural network (IADNet) is adopted. IADNet can extract features from microscopic crack images from different perspectives, perceive noise from multiple levels, and perform denoising processing, greatly improving image quality and enhancing texture details, which is beneficial for training segmentation networks. The combination of IADNet and semantic segmentation algorithm has the ability to finely recognize image information, quantify microscopic crack recognition, overcome the shortcomings of measurement and analysis of microscopic cracks inside 3D printed concrete, and improve construction efficiency and quality.

The invention belongs to the technical field of polymer preparation, and particularly relates to a curved-surface polyaniline modified 3D printing polyurethane material and application thereof. According to the preparation method, an ice crystal hard template method and a polyether glycol soft template method are combined, so that the microstructure of polyaniline is adjusted, and the curved polyaniline with regular morphology is prepared. The curved-surface arc-shaped structure has a large specific surface area, can form more contact sites with resin when being directly melt-blended with the resin, is beneficial to construction of a conductive path, and is not easy to agglomerate due to the curved-surface structure. The polyaniline with the arc-shaped structure is of a three-dimensional space structure and is directly blended with the resin to form a randomly arranged conductive network structure, so that the composite material is not easy to break when being impacted, and can be better embedded between the resin to form a stress transfer channel, and a complex three-dimensional network structure is constructed; the mechanical property and the antistatic capability of the product are improved.

The invention discloses a 3D printing layered honeycomb sandwich panel and a processing method thereof. The processing method comprises the steps that a digital forming platform is constructed, process parameters are initialized, a functional interface layer is laid on a printing substrate in advance, a three-dimensional model is generated, and the printing substrate is divided into a plurality of gradient areas; collaborative printing of a lower panel structure is executed, and a composite panel base body is formed by adopting a multi-nozzle alternate deposition process; according to the characteristics of the divided gradient areas, honeycomb units are formed layer by layer by dynamically controlling printing rheological parameters, and a gradient honeycomb core layer is constructed; the cooperative growth of the upper panel and the gradient honeycomb core layer is realized by adopting a rotary incongruous printing strategy; the performance of the core layer material is regulated and controlled through a multi-stage heat treatment process, and the functional interface layer is activated to obtain the honeycomb sandwich panel; according to the honeycomb sandwich board, the mechanical property customized distribution of the honeycomb core layer is realized, the surface-core interface bonding strength is improved by combining the directional activation mechanism of the micro interlocking structure and the functional interface layer, and the honeycomb sandwich board with high mechanical property and thermal stability is provided.

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.

The invention discloses a concrete 3D printing path optimization method and system based on reinforcement learning, and the method comprises the following steps: representing a to-be-printed geometric model as a graphic structure composed of nodes and edges, each node being a specific position in a three-dimensional space on a printing surface, and the edge representing a feasible moving path of a printing head between the nodes; performing dynamic optimization on the movement of the spray head through a Q-learning algorithm, performing iterative calculation on a Q value, and completing dynamic adjustment on a printing path on the basis of an instant reward to obtain an optimal printing path with the minimum movement distance, the minimum sharp turn frequency and the minimum start-stop frequency; the optimal printing path data is converted into a standard G code, and the 3D printer is controlled to execute the optimal printing path based on the standard G code; by combining the solving process of the optimal Q value in the Q-learning algorithm and the construction requirements of concrete 3D printing path planning, the accurate optimal printing path planning can be efficiently completed through the self-learning-self-evolution algorithm advantages of the reinforcement learning model.

The invention discloses a 3D printing parameter optimization method and system based on artificial intelligence, and the method comprises the steps: scanning a printing object, determining the size and shape of the printing object, and obtaining a digital model of the printing object; the three-dimensional digital model of the printing object is divided into a plurality of layered sheets according to a preset rule, and a single-layer printing path, corresponding to each sheet, in the printing process is obtained; constructing a dynamic error analysis model, and calculating a geometric error index of the current slice; when any index exceeds a threshold value, triggering a parameter optimization process; inputting the real-time data and the error indexes into a pre-trained artificial intelligence optimization model to obtain a parameter adjustment scheme; actual forming data are obtained through a three-dimensional scanner, accumulative errors are calculated, and weight parameters of the artificial intelligence optimization model are updated. The method has the advantages that the real-time printing data is compared with ideal data, the printing parameters are dynamically adjusted through the artificial intelligence optimization model, the path is corrected according to errors, and the precision and quality of the printing process are improved.

Additively manufactured articles of footwear comprising a sole portion and an upper portion 3D printed as a single piece. In some embodiments, the article of footwear can comprise an outer skin comprising a plurality of continuous beams extending adjacent to each other and defining at least part of an outer contour of the upper portion, at least part of an outer contour of the sole portion, or both. In some embodiments, the article of footwear can comprise an inner skin comprising a network of beams defining at least part of an inner contour of the upper portion. In some embodiments, the article of footwear can comprise a core structure that connects beams of the outer skin to beams of the inner skin.

The invention discloses an airspace engine 3D printing thermal stress distribution control method which comprises the following steps: S1, importing a three-dimensional CAD model of an airspace engine structure, and generating a printing layer set; s2, constructing a three-dimensional node graph structure of a printing layer; s3, inputting the thermodynamic prediction input tensor into the heterogeneous attention map thermodynamic network to obtain a node-level thermal stress tensor map; s4, analyzing the node-level thermal stress tensor diagram, and extracting an optimized region; s5, calling an improved chameleon search algorithm in the optimization region; s6, optimal printing parameters of the current printing layer are determined; s7, the 3D printing device is controlled based on the optimized printing parameters, and real-time thermal inductance data are collected; and S8, mapping the thermal inductance feedback set of the printing layer to the corresponding node, and repeatedly executing the steps S2 to S7 until the whole airspace engine structure is printed. According to the method, the heterogeneous graph network and the improved chameleon search algorithm are fused, and precise control over the printing thermal stress of the airspace engine is achieved.

The present application discloses a photocuring 3D printing platform and printing method. The photocuring 3D printing platform comprises: a forming platform; a middle adapter plate, the middle adapter plate being capable of being driven to drive the forming platform to do linear motion in a vertical direction; several leveling mechanisms arranged on the middle adapter plate, each leveling mechanism comprising an inclined surface block, an inclined surface positioning block abutting against a side edge of the inclined surface block, and a guide column block fixed on the middle adapter plate; and several buffer mechanisms elastically supported between the inclined surface positioning blocks and the forming platform, one end of each buffer mechanism abutting against a side edge of the corresponding inclined surface positioning block, and the other end of the buffer mechanism penetrating the middle adapter plate and then being fixedly connected to the forming platform.

The invention discloses a 3D printing defect detection method based on improved YOLOv10n, and the method specifically comprises the steps: constructing a data set, and dividing the data set into a training set and a test set; processing the training set data; the method comprises the following steps of: constructing a DM-YOLO network model by taking YOLOv10n as a basic algorithm; the DM-YOLO network model comprises a trunk feature extraction network, a neck feature fusion network and a detection head network; training the network model by using the training set data; and inputting test set data into the trained DM-YOLO detection model, outputting category information of defect positions in the FDM printed piece, and obtaining a defect detection result. The network is deeply optimized on the basis of YOLOv10n, DSMCAttn, a DySample dynamic up-sampler and a lightweight single-head self-attention mechanism are integrated, and the detection precision and reasoning efficiency of small target defects are remarkably improved.

The invention discloses a flexible structure 3D printing support control method combined with a resistor, and relates to the technical field of 3D printing, and the flexible structure 3D printing support control method comprises the following steps: generating a continuous density field and a dynamic damping parameter field of a support structure based on multi-target topological optimization of dynamic stiffness constraint and material distribution; quantifying the contact probability of the support structure and the target model through a membership function, and constructing a nonlinear gradient field of a contact interface; the stress coupling relation between the supporting structure and the model interface is defined based on the mixed constitutive tensor, the interface stress transfer coefficient is adaptively updated based on the material shrinkage rate difference, multi-physics field collaborative optimization is achieved in combination with regularization constraint, the key part of the supporting structure is recognized, and the resistor is integrated to the key part of the supporting structure. Through multi-target topological optimization, membership construction and adaptive stress transfer coefficient updating, the material consumption is reduced, the printing efficiency is improved, stress concentration at an interface is inhibited, the forming defect risk is reduced, and the structural reliability is improved.

Additively manufactured articles of footwear comprising a sole portion and an upper portion 3D printed as a single piece. In some embodiments, the article of footwear can comprise an outer skin comprising a plurality of continuous beams extending adjacent to each other and defining at least part of an outer contour of the upper portion, at least part of an outer contour of the sole portion, or both. In some embodiments, the article of footwear can comprise an inner skin comprising a network of beams defining at least part of an inner contour of the upper portion. In some embodiments, the article of footwear can comprise a core structure that connects beams of the outer skin to beams of the inner skin.

The present disclosure relates to a pulsing release module, a pulsing release resin tank, and a 3D printing device and printing method. The pulsing release module comprises a resin tank assembly, a support assembly and a pulse gas supply assembly, wherein the resin tank assembly is provided with a release film; the support assembly is arranged below the resin tank assembly, the support assembly is provided with a support member, and a first preset distance is provided between the support member and the release film in a height direction and is configured to form a gas cavity between the support member and the release film; a gas inlet and a gas outlet, which are in communication with the gas cavity, are provided in the support member; and the pulse gas supply assembly comprises a gas oscillation assembly and a gas conveying line, the gas oscillation assembly being arranged on the gas conveying line, and the gas conveying line being connected to the gas inlet.

Apparatuses, systems, and methods are disclosed for use in or with firearms. A firearm receiver includes an elongated channel machined or 3D printed from a metallic material, and has a front end and a rear end. The firearm also includes a front trunnion having a rear portion coupled to the front end of the elongated channel and having a front portion configured to couple to a handguard. Also includes is a rear trunnion coupled to the rear end and configured to receive an accessory adapter.

A method of making a customized catheter for an end user, comprising: capturing images of an end user's urethra; creating a 3D image of the end user's urethra; identifying areas of interest of the end user's urethra; generating a software or computerized model of a customized catheter using the 3D image, wherein the software or computerized model is modified based on the areas of interest; and 3D printing at least a portion of the customized catheter from the model and catheter made by this method

The invention discloses a 3D printed part morphology control method and system based on supporting structure morphology compensation, and relates to the technical field of additive manufacturing. Comprising the steps that a to-be-printed target model is processed, and a to-be-printed model considering a supporting structure form and slurry infiltration characteristics is generated; the printing direction of the to-be-printed model and the interface positions of different slurries during multi-material printing are determined, and the interface positions are perpendicular to the printing direction; according to the determined printing direction and the determined interface position, parts corresponding to different kinds of slurry are printed in sequence, and when the slurry is replaced, the datum plane of the printed part is cleaned, and residual materials are removed; and curing the printed model, removing the supporting structure, cleaning and integrally curing to obtain a final finished product. Liquid shaping is achieved only by means of the modified supporting structure, the printing time cost and the mechanical cost are saved, and accurate regulation and control of the liquid resin form are achieved on the premise that no external device is additionally arranged through integrally-formed supporting morphological optimization.

The utility model provides a pottery clay 3D printing device capable of mixing and conveying raw materials in a fixed proportion, which comprises a rack, a 3D printing device, a 3D printing device and a 3D printing device, wherein the rack comprises an accommodating chamber and a printing chamber which are arranged in an up-down structure; the raw material conveying mechanism comprises a plurality of conveying assemblies arranged above the rack, and the conveying assemblies are used for conveying different raw materials; the mixing and extruding mechanism comprises an extruding assembly which can be transversely and movably arranged in the containing cavity and communicates with the conveying assembly, the extruding assembly comprises a material mixing bin body, a mixing cavity is formed in the material mixing bin body and communicates with the raw material conveying assembly, a stirring assembly is arranged in the mixing cavity, and an extruding head is connected to the lower portion of the material mixing bin body; the printing platform is arranged in the printing cavity in a longitudinal sliding mode and used for bearing 3D printing products, raw materials are directly printed in a printer after being mixed, efficiency can be greatly improved, and the problem that ceramic clay materials are possibly poor in uniformity and stability due to long-term placement or in the transferring process can be solved.

The invention relates to the technical field of 3D printing, in particular to a lightweight design method and system for a 3D printed product and a storage medium. The method comprises the following steps that geometric data information of a 3D printing model is obtained; performing model internal space volume distribution feature extraction and model wall thickness uniformity distribution evaluation on the geometric data information, and predicting a model structure load bearing capacity change trend to obtain structure load prediction data; detecting the optimized space attenuation trend of the material distribution density according to the structural load prediction data; performing dynamic interference removal intensity prediction on redundant materials in the model according to the optimization space attenuation trend to obtain redundant removal intensity data; and determining a coupling balance trend of model lightweight and strength maintenance based on the redundancy removal strength data and the optimized spatial attenuation trend. According to the method, accurate matching of the load demand and material distribution is realized by establishing the correlation model of the wall thickness uniformity and the load bearing capacity.

A continuous fiber reinforced composite topological lattice structure design and 3D printing method comprises the steps that firstly, the elastic tensor of a unit cell structure of a 3D printing continuous fiber reinforced composite is represented, then a topological optimization model of the unit cell structure of the continuous fiber reinforced composite is constructed and divided into sub-regions, fiber tracks are generated for the sub-regions, and finally the topological lattice structure of the continuous fiber reinforced composite is obtained. The arrangement angle of the unit cell structures is calculated, the unit cell structures are periodically filled, and fiber tracks in the sub-regions are obtained; secondly, extracting fiber tracks of the sub-regions, obtaining minimum printing paths of the fiber tracks in each sub-region in combination with a periodic unit cell structure printing form, and connecting to obtain 3D printing sub-paths; then the 3D printing sub-paths are connected to obtain a 3D printing path of the continuous fiber reinforced composite topological lattice structure, and G-codes are generated in combination with the printing speed and the material feeding rate and used for sample piece manufacturing of a 3D printer; the manufacturing requirements of continuous fiber 3D printing are met.

There is provided a 3D printed metal component having a metal body and an internal cavity within said metal body, the component comprising a 3D printed electrode within the internal cavity, the 3D printed electrode having lower density than the metal body.

The present disclosure provides a ceramic three-dimensional (3D) printing device based on a gel molding process and a control method. The ceramic 3D printing device based on a gel molding process includes a feeding assembly, a receiving assembly, a scraping assembly, and a spray assembly. The feeding assembly includes a feeding pump and a storage hopper. The receiving assembly includes a feeding rod. The feeding pump can convey slurry in the storage hopper to the feeding rod. The control method includes introducing the atomized liquid into the storage hopper and the bearing groove through the first spray pipe and the second spray pipe respectively. According to the present disclosure, a water content of the slurry can be controlled to achieve a better curing effect.

A three-dimensional printing device for printing one or more three-dimensional products. The 3D printing device comprises a print surface configured to support the printing of the one or more 3D products, a frame arranged at a distance above the print surface, wherein the frame is oriented in a first plane substantially parallel to the print surface, a printing head comprising a printing nozzle configured for dosing the build material on the print surface or on a previous layer in a dosing direction to print the one or more 3D products in a series of layers, wherein the printing nozzle is arranged to extend at an acute internal angle measured between the print surface and the dosing direction, and wherein the printing head is movably coupled to the frame such that the printing head is movable along the first plane with respect to the print surface and wherein the print head is movable in a vertical direction with respect to the print surface, a controller configured to control a movement of the printing head along the first plane and / or in the vertical direction.

The invention relates to the technical field of atomization powder making, in particular to a plasma rotating electrode atomization powder making system and method based on target particle size powder, and the system comprises a bar chamber used for storing electrode bars; the material pushing chamber is communicated with the bar material chamber, and a material pushing mechanism and a driving mechanism are arranged in the material pushing chamber; and the atomizing chamber is arranged on one side of the material pushing chamber. The powder characteristic monitoring device is used for monitoring the state of the powder for powder making in real time, process fluctuation can be detected in real time, parameters can be adjusted in time, hysteresis of traditional off-line sampling inspection is avoided, different production modes can be switched by controlling the distribution uniformity characteristic and the distribution width characteristic of the powder at the same time, and the production efficiency is improved. For example, the strict requirements of 3D printing for narrow-distribution and high-uniformity powder are met, for example, for wide-distribution powder needed by thermal spraying, the same equipment can achieve higher production flexibility, and diversified production requirements are met.

The invention discloses a soft rock tunnel overexcavation backfill method, and relates to the technical field of tunnel construction.The soft rock tunnel overexcavation backfill method comprises the steps that a three-dimensional live-action image in a tunnel is scanned; establishing a three-dimensional live-action model according to the three-dimensional live-action image; establishing a digital twin model of the tunnel according to a design drawing; carrying out geometric intersection on the three-dimensional live-action model and the digital twin model to obtain geometric parameters of an overexcavation area; a concrete mold is subjected to 3D printing according to the geometric parameters of the overexcavation area; concrete is poured into the concrete mold, and a backfill body is formed; and the backfill body is backfilled to the overexcavation area. Due to the fact that the formed backfill body is tightly attached to the tunnel wall of the overexcavation area, the backfill precision is effectively improved, the construction quality is improved, the stability and the bearing capacity of the inner wall of the tunnel are enhanced, potential safety hazards are reduced, the concrete backfill work amount can be accurately controlled, the construction cost is reduced, and material waste is avoided.

The disclosure provides Si-free aluminum alloys comprising Ce, Zn, and Mg suitable for laser powder bed fusion (LPBF) 3D printing. The printed components can be subjected to hot isostatic pressing and further heat treated to provide 3D printed components exhibiting higher hardness than existing Al-Si based alloys produced under the same conditions. The Si-free aluminum alloy resists coarsening of second phase on HIP, retaining high strength and hardness. The alloy also does not need separate solutionizing and water quenching following HIP, thus saving cost, time and permitting design of more delicate and intricate geometries.

The invention relates to the technical field of geotechnical engineering, and discloses a grouting test system capable of controlling a dynamic water environment and a fracture geometric structure, which comprises a grouting module, a fracture geometric structure control module, a dynamic water control module and a data acquisition module, the grouting module is connected with the fracture geometric structure control module through a grouting pipe; the flowing water control module is connected with the fracture geometric structure control module through a water injection pipe, and the grouting module is used for achieving stable-pressure grouting in the fracture geometric structure control module. Through the combined design of the electric spiral elevator and the 3D printing rough fracture plate, flexible adjustment of fracture width, inclination angle and roughness is realized, rock fractures in different geometric forms can be simulated, the test bed is made of a transparent material, and the diffusion process of slurry in the fractures can be clearly observed in combination with a high-resolution image acquisition device.

The utility model discloses high-strength polymer 3D printing equipment, and belongs to the technical field of printing equipment, the high-strength polymer 3D printing equipment comprises a printer body and an aligning mechanism, two first screw rods are rotatably embedded between the inner walls of the printer body, and a movable frame is sleeved between the outer surfaces of the two first screw rods in a threaded manner; through cooperation of two first screw rods, a moving frame, a second screw rod, a limiting rod and a mounting frame, a discharging barrel can conveniently move in the transverse direction and the longitudinal direction, printing work of a printer body is facilitated, alignment plates are located on the two sides of a discharging nozzle of the discharging barrel, the two sides of a printing material can be conveniently leveled, a mounting ring rotates, the two alignment plates are conveniently driven to conduct angle adjustment, and the printing efficiency is improved. The use height of the alignment plates is conveniently adjusted through the electric telescopic rods, the mounting screws rotate on the corresponding fixing frames, then the mounting blocks are conveniently driven to move, the distance between the two alignment plates is conveniently adjusted, the alignment mechanism can conveniently meet the printing requirements of different thicknesses, and the universality of the alignment mechanism is improved.

The invention provides a continuous fiber 3D printing nozzle structure and a composite material product, and belongs to the technical field of continuous fiber 3D printing manufacturing device.The nozzle structure comprises a hollow columnar spray head, a rolling device and a shell, the rolling device is located at the front end of the hollow columnar spray head, and the shell surrounds the periphery of the hollow columnar spray head; a storage cavity for storing filler is formed by the inner wall of the shell and the outer side wall of the hollow columnar spray head; the rolling device comprises a regular polygon mounting frame and rolling blocks, each edge of the mounting frame serves as a mounting shaft, each mounting shaft is rotationally provided with the corresponding rolling block, raw materials extruded from the hollow columnar spray head pass through a space defined by the multiple rolling blocks, and the rolling blocks are compacted on the surface of the extruded wire in the moving process of the 3D printing nozzle; a filler conveying assembly is arranged on the bottom wall of the shell and used for conveying filler in the storage cavity to the outer surfaces of the rolling blocks. According to the invention, the risks of fuzzing and wire breaking in the printing process of the wires can be reduced.

The invention provides a precision machining and 3D printing mixed manufacturing execution system, and relates to the technical field of data processing, and the system is used for dividing a three-dimensional model into a configuration area and a finishing area, generating a layer-by-layer closed contour path, obtaining configuration path data, extracting a boundary segment close to the finishing area, and obtaining a configuration path data set; calculating a space projection vector on a finishing target surface to obtain primary finishing path data; calculating a boundary torsion value; superposing interference offset in a historical sample path to a primary finishing path; calculating an interference amplitude index; the fitting path data and the configuration path data are subjected to path connection and unified processing according to the manufacturing sequence, and a mixed execution path instruction is obtained. Precise machining and 3D printing are integrated, and path overlapping, empty cutting or unnecessary machining is avoided.

The invention relates to 3D printing silk fibroin-based conductive hydrogel as well as a preparation method and application thereof, and belongs to the technical field of hydrogel. The preparation method comprises the following steps: S1, adding silk fibroin, a graphene oxide dispersion liquid and glycidyl methacrylate into a lithium bromide solution for reaction, and performing dialysis, centrifugation and freeze drying to obtain modified silk fibroin; s2, dissolving the modified silk fibroin, polyethylene glycol diacrylate and a photoinitiator in water, and centrifuging and defoaming to obtain bio-ink; s3, preparing the bio-ink into the 3D printing silk fibroin-based conductive hydrogel through a DLP 3D printing technology. Methacrylic acid silk fibroin is used as a base material, polyethylene glycol diacrylate is used as a reinforcing material, and graphene oxide is introduced to construct the photocuring printing ink. In addition, the silk fibroin-based conductive hydrogel with excellent performance can be prepared by combining the structural design of multilevel porous and triple-period extremely small curved surfaces.