1285 results about "3d printed" patented technology

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 discloses a modular self-adaptive robot device based on SMA driving paper folding bionics. The modular self-adaptive robot device is composed of peak folding rods, valley folding rods, SMA wires, a magnetic attraction connecting structure and a 3D printing bottom plate, and self-adaptive operation is achieved through driving-sensing-structure integrated cooperation. The SMA wires have driving and sensing functions, structural deformation is driven through PWM, resistance change of the structural deformation is measured in real time, and axial telescoping, radial telescoping and bending of the module can be controlled in a closed-loop mode without an external sensor. The device is combined based on the lever amplification principle, tiny deformation of the SMA wire is efficiently converted into large-stroke output of a mechanism, and the problem that the stroke of an SMA driver is limited is solved. A single module has three modes of radial expansion, linear actuation and torsion joint, and complex movement can be completed through combination. A plurality of modules are connected in series with a quick connecting piece through magnetic attraction, and the functions of bionic wriggling, rod cable climbing or multi-section operation arm can be achieved through time sequence programming. And a flexible and reconfigurable robot solution is provided for detection and rescue tasks in a complex environment.

The invention belongs to the technical field of metal-based composite material additive manufacturing, and particularly relates to a graphene titanium-based composite material additive manufacturing method based on machine learning, and the graphene titanium-based composite material additive manufacturing method based on machine learning comprises the following steps: collecting and preprocessing multi-modal data; constructing a multi-target prediction GNN model and carrying out model training and evaluation to obtain an optimal GNN model; the optimal GNN model is optimized through a second-generation non-dominated sorting genetic algorithm, and a multi-objective optimization result is obtained; a qEHVI Bayesian optimization algorithm is adopted to screen out an optimal parameter group from the multi-target optimization results; and 3D printing verification and closed-loop iteration are carried out. According to the method, machine learning prediction, 3D printing verification and data feedback are integrated into a closed-loop iteration system, dynamic optimization of'parameter recommendation-> 3D printing-> performance testing-> model updating 'and autonomous optimization of material performance are achieved, and research and development efficiency is remarkably improved.

The invention discloses a preparation method and application of a wind cap of a circulating fluidized bed gasifier, the wind cap is arranged at the bottom of a gasifier body, the wind cap mainly comprises a wind cap gas inlet, a wind cap gas outlet and a wind cap gas flow channel, and the wind cap gas flow channel is composed of a Tesla valve fluid channel. The air cap is prepared from modified fly ash through a combined method of freezing ball-milling nano modification, 3D printing coupling microwave-assisted sintering and salt bath chromizing strengthening. According to the method, a large amount of solid waste of fly ash can be consumed to realize carbon emission reduction, the efficiency of the circulating fluidized bed can be improved through structural optimization, meanwhile, the preparation cost of the hood can be reduced, and the method has relatively high application and popularization values.

A dual-switch 3D print head having synergistic printing of resin and continuous fibers, the print head comprising a main frame (1), wherein a resin head extrusion mechanism (3) is provided on the main frame (1); the main frame (1) is connected to a continuous fiber printing mechanism (6) by means of a dual-nozzle switching mechanism (2); a continuous fiber cutting mechanism (7) and a wire feeding and clamping coordination mechanism (63) are provided on the continuous fiber printing mechanism (6); the continuous fiber printing mechanism (6) comprises a continuous fiber printing mounting plate (61); a fiber clamping mounting base (631) is provided on one side of the top of the continuous fiber printing mounting plate (61); a fiber clamping actuator is mounted on the fiber clamping mounting base (631); a clamping connecting rod (635) is movably connected to the end of the fiber clamping actuator; the other end of the clamping connecting rod (635) is connected to a fiber guide wheel (633); a wire feeding gear (634) is provided beside the fiber guide wheel (633); and the wire feeding gear (634) is mounted on the continuous fiber printing mounting plate (61). The dual-switch 3D print head can ensure the precision of the relative positions between dual nozzles during multiple switchings for a long time, and also achieve the organic combination of active wire feeding and passive wire feeding for a continuous fiber wire material is also realized, thereby realizing high-quality printing of continuous fibers.

The invention provides a micro-miniature semi-tilting unmanned aerial vehicle and a control method thereof.The unmanned aerial vehicle comprises a main body structure, a coaxial double-paddle system, a tilting double-rotor system, a full-motion control surface assembly, a flight control system and a power supply assembly; the main body structure is composed of a carbon fiber carbon plate, a carbon tube and a 3D printing photosensitive resin part, and light weight and rigid supporting are achieved; the coaxial double-propeller system provides main lift force and counteracts reverse torsional moment; the double-rotor system is tilted, and a lift force / thrust mode is switched; the pneumatic efficiency of the tilting rotor wing is improved by the full-motion control surface assembly; the control method comprises a low-speed mode and a high-speed forward flight mode, the vertical take-off and landing, hovering and high-speed cruising are integrated, the structure is simplified, the stability is improved, and the cost is low.

The invention discloses a YOLO-Drop-based 3D printing droplet microfluidic immunoassay method, which organically integrates a high-precision microfluidic chip preparation technology, a droplet-level immunoreaction system and a fluorescence imaging acquisition and deep learning detection algorithm. And full-chain closed-loop processing from droplet generation, fluorescence signal acquisition, image recognition, result statistics to concentration quantitative analysis is realized. Through deep combination of chip physical parameters and model input features, the method not only significantly improves the accuracy and stability of droplet identification and concentration quantification, but also enhances the robustness of the algorithm under complex sample conditions through multi-scale feature fusion and a signal dual screening mechanism. Meanwhile, the optimized YOLO-Drop model supports embedded efficient reasoning, so that the whole analysis process has the characteristics of real-time performance and high throughput, and the method is suitable for rapid quantitative detection of various biomarkers.

The invention discloses a manufacturing method of a 3D printing guide plate for a cervical vertebra single-door operation, and relates to the technical field of crossing of medical auxiliary instruments and additive manufacturing. Firstly, a cervical vertebra CT data three-dimensional reconstruction skeleton model is obtained, an operation scheme is virtually planned, then a navigation template digital prototype is generated through parameterization, finite element simulation optimization is carried out, and a three-dimensional 3D printing guide plate for the cervical vertebra single-door operation is obtained. Printing with the biocompatible resin by using light curing equipment, and finally treating to obtain a final product. According to the method, a high-precision cervical vertebra skeleton model is generated through CT thin-layer scanning and three-dimensional reconstruction, parameters of a hinge area, a door opening groove line and a nail path are determined through virtual planning, and the problem that damage or positioning deviation is easily caused due to the fact that a traditional operation depends on experience is solved; constructing a navigation template attaching curved surface by a specific algorithm, reserving a soft tissue compensation gap, matching with a hollow window bulge to limit the depth of an abrasion drill, controlling the deformation of a guide plate through finite element simulation and topological optimization, selecting specific resin to ensure the stability, ensuring the suitability by virtue of virtual registration and standardized manufacturing, and improving the accuracy, safety and efficiency of an operation.

The invention discloses a curing shrinkage compensation and forming precision control method and system for 3D printing, and relates to the technical field of 3D printing additive manufacturing, and the method comprises the steps that three-dimensional model data and printing process parameters of a to-be-formed part are obtained, and a compensation model is established and called; generating hierarchical data according to the three-dimensional model and generating target exposure information of each layer; in the printing process, target exposure information is corrected based on the compensation model and the technological parameters to obtain execution exposure information, and curing forming is completed; acquiring an intra-layer image and comparing the intra-layer image with layered data to calculate a deviation field of the current layer; and updating the compensation model according to the deviation field increment, generating a next layer of compensation quantity, and circulating until forming is completed. A deviation field is adopted to drive closed-loop updating, self-adaptive convergence of working condition drifting is achieved, critical dimension consistency, boundary fidelity and shape stability are improved, test participation experience dependence is reduced, three-dimensional collaborative correction according to contours, doses and beats is supported, and therefore repeatability of batch manufacturing of precision parts is improved.

The invention discloses a phase regulation curved surface conformal active metasurface, and relates to the technical field of metasurface design, a metasurface unit is composed of a metal layer and a dielectric layer, the metal layer comprises a metal structure layer and a metal backboard layer, and the dielectric layer comprises an F4B dielectric substrate and an ABS dielectric layer. The metasurface unit is sequentially provided with a metal structure layer, an F4B dielectric substrate, an ABS dielectric layer and a metal backboard layer from top to bottom, and the metal structure layer is externally connected with a feed structure by adopting a circular through hole technology and is used for adjusting the voltage at the two ends of the variable capacitance diode. According to the phase regulation curved surface conformal active metasurface, the 3D printed curved surface substrate is combined with the voltage programmable 2-bit phase code, so that the metasurface has high adaptability to the curved surface structure, and electromagnetic wave dynamic regulation and control and vortex wave generation can be carried out within the frequency band of 9.3 GHz to 10.5 GHz and within the angle range of 0 degree to 50 degrees.

The present disclosure relates a method of chemical polishing a 3D printed object. The method comprises treating a 3D printed object with solvent to reduce the surface roughness of the 3D printed object, and controlling the Youngs modulus of the 3D printed object within a target value by selectively removing at least part of the solvent from the 3D printed object.

The application provides a 3D printing ceramic filter and a preparation method of a slurry and the filter, and the composition of the filter comprises 90-92wt% of ZrO2, 4.7-4.8wt% of MgO, 1.9-2.0wt% of HfO2 and 1.4-1.5wt% of SiO2. The application improves the exposure precision of the slurry by adjusting the type and ratio of monomers and the adding amount of initiators, thereby improving the porosity of the filter and the flow rate when the filter is used to filter the metal liquid. The yield of the 3D printing ceramic filter is high, and reaches more than 80%. The addition of the organic silicon modified epoxy resin in the ceramic slurry improves the printing efficiency. The anti-settling wax can solve the problem of fast slurry settlement and improve the crack problem existing in the appearance.

Embodiments of the present disclosure provide an apparatus, a system, and a method. The apparatus is configured to depowder and extract one or more printed parts prepared by a three-dimensional (3D) printer. The apparatus includes an elevated frame, a perforated plate, a lifting-lowering mechanism, a depowdering unit, and at least one gripper. The elevated frame is removably secured to an open top of a first container and configured to transversely receive fully raised at least one 3D printed layer and partially raised at least one powder layer. Upon lifting the elevated frame along with the perforated plate, the depowdering unit is configured to depowder the at least one powder layer and powder in between the one or more 3D printed parts. The at least one gripper is configured to automatically extract the one or more 3D printed parts.

The invention discloses a method for manufacturing a hydraulic support column socket casting mold through the 3D printing technology, and relates to the technical field of mold manufacturing, the method comprises the following steps that a three-dimensional digital model of a column socket casting is obtained, and the model comprises a ball socket curved surface with the continuous change curvature; based on the geometrical characteristics of the ball socket curved surface, multiple sub-regions with different printing process requirements are identified, and differentiated printing process parameter sets are distributed to the sub-regions; printing a mold blank according to the printing process parameter set by adopting a fused deposition modeling process; and the mold blank is subjected to finish machining, and the casting mold is obtained. In the process of 3D printing of the column socket mold, the ball socket area is divided into a plurality of sub-areas of the high-risk area and the general area according to intelligent geometric analysis of the curvature and the normal direction, different printing strategies are adopted in the different sub-areas, the amplitude of the periodic wavy surface is weakened, and the size precision and the profile tolerance of the casting mold are remarkably improved.

The invention relates to the technical field of biomedical materials, in particular to multi-material 3D printing bionic gradient soft-hard integrated hydrogel as well as a preparation method and application thereof. Based on a copolymerization system of high-strength supramolecular N-acryloylglycinamide and vinyl phosphoric acid, an NAGA aqueous solution and an NAGA-VPA aqueous solution are printed into hydrogel of a gradient structure by adopting a DLP multi-material printing technology, then the hydrogel is sequentially soaked in a calcium-phosphorus mixed aqueous solution (Ca / P = 1.67), ammonia water, a calcium chloride aqueous solution and deionized water, and the hydrogel is prepared through a hydrothermal method. Therefore, in-situ gradient deposition and curing of hydroxyapatite (HAP) are realized. The multi-material 3D printing bionic gradient soft-hard integrated hydrogel prepared by the method has a continuous biochemical-mechanical gradient, a surface layer low-modulus area is matched with cartilage performance, a deep layer high-mineralization area is integrated with bone tissue, the HAP crystallinity of a transition area is in spatial dependence distribution, and the hydrogel is suitable for osteochondral defect repair and manufacturing of bionic joint prostheses.

A system, method, and computer-readable medium having machine instructions provides for predicting geometric shape accuracy of 3D printed products. Such a prediction may involve developing a model of an object and determining ways in which an actually-manufactured 3D object corresponding to the model differs in real life. These differences correspond to shape deviations. Shape deviations may be process dependent and / or path dependent, and different layers of the object as well as the manufacturing process to make the different layers may introduce shape deviations in layers of the object. By developing a transfer functions of the manufacturing process and associated interlayer effects of the layers and then appropriately offsetting inputs to the manufacturing process, the shape deviations may be ameliorated.

The application discloses a kind of polymer material 3D printing additive and subtractive integrated machine and its control method, including rack body, movement module, milling cutter module, material spraying module, camera module, rack body is the frame structure of near body face opening, movement module is set in the middle frame of rack body;Movement module includes X-axis movement component, Y-axis movement component, Z-axis movement component, and the model of 3D printing forming is formed on the bearing platform by material spraying module;The cutter is provided below the milling cutter module by R-axis connecting seat, and the printed model is polished by the rotation of cutter.The control method provided by the application corrects the model sprayed by milling cutter module to material spraying module, and adopts the way of layer-by-layer spraying and layer-by-layer correction, which greatly improves the precision of spraying forming.

The invention relates to an electric arc additive mixed end plate connecting device and a performance prediction method, and the method comprises the steps: manufacturing a WAAM end plate at the end part of a conventional steel pipe through multi-axis metal 3D printing, and forming a mixed connecting piece; the two mixed connecting pieces are in butt joint through high-strength bolts to form the mixed end plate connecting device; geometric characteristic parameters of the mixed end plate connecting device are obtained by adopting a three-dimensional scanning technology, and the mechanical response of the mixed end plate connecting device is measured by combining a four-point bending test with a digital image correlation technology; and on the basis of the geometrical characteristic parameters and the mechanical response data, the yield bearing capacity is predicted through a correction yield line analysis method, and the ultimate bearing capacity is predicted by adopting an equivalent beam model considering the strain hardening effect. The device and the method have the beneficial effects that geometric characteristic measurement, interface connection characteristic and yield performance test, bearing prediction evaluation and application design of the mixed end plate connecting device combining the electric arc additive manufacturing stainless steel, low-carbon steel and high-strength steel end plates with the conventional steel pipe can be effectively realized.

The invention discloses a 3D printing photocuring forming method for a silicon nitride ceramic framework, and belongs to the technical field of advanced ceramic additive manufacturing. According to the 3D printing photocuring forming method for the silicon nitride ceramic framework, the silicon nitride framework containing a communicating hole array and a special-shaped supporting structure can be prepared through the DLP photocuring technology and customized slurry, the efficient infiltration requirement of a multiphase ceramic matrix is met, and the manufacturing efficiency is improved. The powder dispersity is improved through modification of a silane coupling agent, resin residues are thoroughly removed through cooperative control of a low-shrinkage resin system, segmented exposure, gradient degreasing and sintering, interface reaction with a complex-phase matrix at high temperature is avoided, stable complex-phase performance is guaranteed, layering does not exist after standing is conducted for 24 h through customized slurry, the process stability is extremely high, and the method is suitable for industrial production. Therefore, the problems of single skeleton structure, low dimensional precision and high impurity content in the prior art are solved, a complex three-dimensional pore structure can be prepared, the process stability is high, and the method is suitable for batch production and meets the requirements of multiple scenes such as high-temperature structural parts and multiphase ceramic reinforcement bodies.

The present disclosure is directed to a construction element produced by additive manufacturing, an additive manufacturing system for producing the construction element and a method for manufacturing the construction element. The construction element includes an outer layer. The outer layer is configured to define or form an enclosure. The construction element further includes an inner matrix. The inner matrix is formed within the enclosure. The outer layer and the inner matrix are formed integrally, by depositing successive layers using an additive manufacturing system. The inner matrix is defined by a first layup and a second layup. The first layup is laid along a first direction and across the enclosure. The second layup is laid juxtaposing the first layup. The first layup and the second layup define a plurality of air pockets in the inner matrix. Further, a filler material is infused into at least some air pockets of the plurality of air pockets.

The utility model discloses a placing platform for 3D printing in the technical field of 3D printing, which comprises a platform base and a platform main body, the platform base is mounted above a base of an external 3D printer, the upper wall of the platform base is connected with the platform main body in a suction manner, and the platform main body comprises a mounting frame, a platform steel plate, a convex ring, a through groove and a magnetic suction block. A through groove is formed in the lower wall of the installation frame, a magnetic attraction block is installed in the through groove in an inserted mode, the magnetic attraction block can be connected with the platform base in an attracted mode, a protruding ring is installed on the inner side wall of the installation frame, and the platform steel plate can be inserted into the installation frame. A platform steel plate can be pressed through a convex ring on the inner side of the mounting frame, meanwhile, a plurality of magnetic attraction blocks are arranged below the mounting frame to attract the steel plate, so that the levelness of the platform steel plate is guaranteed, the quality of subsequent 3D printing is guaranteed, and in addition, a leveling mechanism is arranged, and leveling treatment can be conducted on the platform base and the platform body above the platform base.

The invention relates to a 3D printing sand mold cleaning device which is characterized by comprising an automatic sand cleaning room, a roller shutter door arranged at an inlet of the sand cleaning room, an automatic transfer trolley used for bearing and transferring a sand mold, a sand cleaning mechanism, an air supply system and a control unit. The sand cleaning mechanism comprises a plurality of sand cleaning actuators and a driving mechanism used for driving the sand cleaning actuators to do linear movement independently. An automatic sensing device is arranged on each sand cleaning actuator and is used for detecting the distance between the automatic sensing device and the surface of the sand mold in real time in the moving process; the control unit is in signal connection with the driving mechanism, the automatic induction device and the air supply system. The invention further relates to a sand cleaning method for the 3D printing sand mold. According to the scheme, the problem that a traditional automatic sand cleaning device cannot treat sand molds with complex inner cavities, deep cavities or special-shaped structures can be solved.

The present application relates to the technical field of additive manufacturing online monitoring and closed-loop control, in particular to a 3D printing workpiece defect identification system based on image detection; containing coaxial acquisition, potential mapping, diffusion analysis, singular point extraction and bidirectional feedback module; the system converts the collected image stream into a virtual flow velocity vector field; the core is to simulate the evolution of the physical field by using the virtual viscosity diffusion algorithm, calculate the difference of the vector field before and after diffusion to extract the topological mutation, and generate a defect potential thermal map; based on the potential value of the thermal map, the system performs bidirectional feedback of generating G code intervention instructions and adjusting the virtual viscosity coefficient; the present application reduces the pattern recognition to local physical field simulation, without sample training, and realizes millisecond-level real-time response.

Disclosed herein is a system providing a mixed reality combination system that pairs augmented reality technology and an inertial measurement unit sensor with 3D printed objects such that user motions tracked by the inertial measurement unit as the user interacts with the 3D printed object is reflected in a virtual environment display of dynamic 3D imagery and augmented reality imagery.

The utility model discloses a powder spreading mechanism based on a 3D printer and a 3D printing device, and the powder spreading mechanism comprises a translation cross beam frame capable of performing translation motion; the powder spreading roller body is arranged on the translation cross beam frame in a switching assembly manner; and two end parts of the driving rope body are positioned, and the driving rope body is assembled on the powder spreading roller body in a winding manner. According to the mechanism and the device, the powder spreading roller body can be effectively driven to translate corresponding to the powder spreading bed through the translating cross beam frame, and meanwhile, smooth low-vibration powder spreading can be effectively realized by utilizing the roller body transmission part based on the driving rope body under the friction driving action of the rope wheel, so that the stability of the flattening function of the powder bed is remarkably enhanced, and the functional practicability is improved.

The invention discloses a 3D printing dynamic visualization interaction system and method based on spatial unconstraint, and the method comprises the steps: S1, collecting and preprocessing environment data, and generating a camera pose, a projection carrier normal direction and an anchor point set; s2, generating timestamps and writing the timestamps into a pose channel and an anchor point channel; s3, the dynamic modeling engine receives the input three-dimensional model, and semantic layering and slicing processing is executed; s4, establishing a double-buffer asynchronous rendering architecture; s5, on the basis of a zero-interruption displacement mechanism, when it is detected that the posture changes and the projection sites are switched, continuous output of foreground buffering is kept, new full-precision frames are rendered through background buffering, and foreground buffering and background buffering are switched at the vertical synchronization moment after rendering is completed; s6, receiving a parameter updating instruction input and analyzed by the user; s7, outputting a synchronous rendering frame and an interactive updating result; and S8, outputting the application interface. Free projection and zero-interruption interaction in the 3D printing process are achieved.

A three-dimensional printing kit includes a substantially colorless fusing agent and a color assist agent. The fusing agent includes a liquid vehicle including water, a co-solvent, and an amino acid stabilizer. The fusing agent further includes an infrared (IR) absorbing pigment dispersion including an IR absorbing pigment present in an amount ranging from about 0.01 wt % active to about 1.6 wt % active, based on a total weight of the fusing agent. The color assist agent includes a liquid vehicle including water and a plasticizing co-solvent, and a dye dissolved in the liquid vehicle. Also disclosed is a method of making a colored 3D printed object.

The invention discloses an auxiliary casting process based on an FDM3D printing empty shell, which comprises the following specific casting processes: partitioning according to the size of a model and stress partition areas, and gluing while adopting mortise and tenon joint connection between adjacent partitions; printing a treated model and a riser pouring gate, removing a support from the model, and then improving the smoothness of the model; sand is burnt on layer by layer to manufacture a shell; burning off the 3D printed model at high temperature to form a sand shell; cleaning an inner cavity of the sand shell; and casting a casting by using the empty sand shell. The auxiliary casting process has the advantages of high casting speed, low cost and high-quality delivery, can help enterprises to shorten the time from design to finished products, and is of great significance to quick response, pilot production or small-batch production of the market.

This utility model provides a high-efficiency heat dissipation mechanism and a 3D printer, relating to the field of 3D printer technology. The utility model includes a mounting frame, with a bracket fixedly mounted on one side of the mounting frame. A drive mechanism and a fan blade are provided on one side of the bracket. The fan blade is rotatably mounted on one side of the bracket via the drive mechanism. A cleaning device is provided on one side of the fan blade. The cleaning device uses a brush block to clean the fan blade as it rotates. By setting and adjusting the brush block so that one side of the brush block abuts against the outer surface of the fan blade, and then fixing the brush block, the brush side of the brush block can automatically clean the fan blade when it rotates. This allows small particles on the fan blade to detach from the blade and be blown out by the airflow generated by the fan, facilitating rapid cleaning of these small particles. This helps prevent the cooling fan's heat dissipation performance from decreasing and also facilitates normal heat dissipation of the 3D print head.