1014 results about "Additive layer manufacturing" patented technology

This invention provides a multifunctional gradient composite filament for 3D printing, its preparation method, and its applications, relating to the field of additive manufacturing materials technology. The filament's cross-section includes at least two structurally or functionally distinguishable regions, each region composed of a thermoplastic polymer with different chemical properties, or a thermoplastic polymer matrix with the same chemical properties but different functional modifications. These at least two regions are arranged in an ordered spatial pattern on the filament's cross-section using a multi-component co-extrusion technique, enabling pre-design and integration of properties. This invention overcomes the inherent limitations of traditional single-material filaments, achieving multifunctionality and performance designability of a single filament. It significantly improves the interlayer bonding performance of multi-component 3D printing and the comprehensive mechanical properties of the printed composite material. Furthermore, it allows for the production of components with both functional gradients and high mechanical properties in a single printhead operation, making it suitable for mass production.

A method for providing a bending mold for an off-the-shelf implant, the method comprising obtaining information about a bony anatomy of a patient from one or more medical images; developing a virtual three-dimensional model of the bony anatomy based on the information about the bony anatomy, selecting an off-the-shelf implant, simulating a bending of the off-the-shelf implant using a three-dimensional model of the selected off-the-shelf implant and the virtual three-dimensional model of the bony anatomy to obtain a virtually bent implant having a first, bone-facing, surface and a second surface opposite the first surface, using the virtually bent implant, designing a bending mold mating with the first or the second surface, and based on the design of the bending mold, manufacturing the bending mold using additive manufacturing.

This invention provides a method and system for online monitoring and quality assessment of additive manufacturing processes based on multi-sensor fusion, relating to the technical field of additive manufacturing. The method includes: constructing a multimodal spatiotemporal dataset; extracting features from each physical modality data to obtain an independent feature representation set; inputting the independent feature representation set into a preset dynamic cross-modal attention network to calculate the mutual information correlation matrix and perform feature weighted reconstruction to obtain a deep fusion feature vector; inputting the deep fusion feature vector into a preset quality mapping model to output quality assessment index values ​​representing defect probability and defect classification; constructing a three-dimensional quality digital twin model; and outputting online monitoring and early warning commands and global quality assessment results based on the three-dimensional quality digital twin model. This invention completely eliminates the problem of spatiotemporal registration misalignment of multimodal data, achieving high-precision deep feature fusion and voxel-level panoramic three-dimensional quality space mapping and tracing.

This invention provides a powder material that improves flowability and particle breakage strength compared to existing technologies. The powder material of this invention has a dendritic structure (1). The dendritic structure (1) has a superhard alloy composition or a cermet composition.

The present invention relates to a method for powder-bed fusion additive manufacturing of a radiofrequency device, comprising a depowdering step, during which the powder residue is discharged through a through-hole (10, 20) made in the manufacturing support (S) and / or in a wall of the radiofrequency device (1) adjacent to the manufacturing support (S) without the manufactured radiofrequency device (1) having to be separated from the manufacturing support (S) during the step of discharging the powder residue. The invention also relates to a manufacturing support comprising at least one through-hole (10) allowing a powder residue to be discharged during a depowdering step. (Fig. 2)

An additive manufacturing process for all or part of a tire tread configured to smooth any raised areas (R) present on a circumferential bearing surface (5) of said tire by depositing an extruded material forming the tread, wherein a pressure regulating device (24) inside the extruder is controlled in real time, via a pressure control loop, according to a pressure measured by the pressure sensor and a constant pressure setpoint. The process is configured to smooth a plurality of raised areas (R) present on a circumferential bearing surface (5) of the tire. Figure for the abstract: Fig 8A

A golf club shaft includes an extended body that includes an outer layer and extends between a butt end and a tip end. The extended body includes at least two unlike materials printed together, and the extended body is unitary.

The application belongs to the technical field of additive manufacturing, and discloses a pressurized printing device for laser additive manufacturing, which comprises a high-pressure cabin, a light-transmitting piece, a printing mechanism, a powder laying mechanism and a pressure adjusting mechanism, the high-pressure cabin is installed on a printer substrate of a laser powder bed melting equipment, the light-transmitting piece is arranged on the high-pressure cabin, the printing mechanism is arranged in the high-pressure cabin and is used for carrying powder and forming a printing layer, the powder laying mechanism is arranged on the printing mechanism and is used for laying powder layer by layer, and the pressure adjusting mechanism is connected with the high-pressure cabin and is used for adjusting the air pressure in the high-pressure cabin. The application can be directly installed on the printer substrate of the laser powder bed melting equipment without any modification on the original equipment. The inert gas is filled into the high-pressure cabin through the pressure adjusting mechanism, and the air pressure in the cabin can be increased to a preset value. The high-pressure environment significantly increases the boiling point of metal materials, reduces the evaporation and burning loss of elements in the laser melting process, and reduces the generation of smoke and dust and the shielding of the laser light path.

The application belongs to the technical field of additive manufacturing equipment, and relates to a non-contact powder spreading device for additive manufacturing, which comprises a powder storage groove, a powder controller and a control panel; the powder controller is arranged at the bottom of the powder storage groove; and the control panel is connected with the powder controller and drives the powder controller to open or close. The application can avoid the problems of knife sticking and powder sticking, and can also avoid the problems of deformation and damage of the formed part caused by scraping. The application can effectively improve the forming quality of the powder spreading type additive manufacturing equipment and is also beneficial to the realization of the non-support forming technology.

The application provides a continuous fiber reinforced composite material additive manufacturing stiffened structure impact resistance design method, B-spline parameterization characterization is performed on a macroscopic topological distribution pseudo-density field and a microscopic fiber orientation fiber direction field, and B-spline control parameters are used as optimization design variables; impact resistance topology optimization based on an equivalent static load method is adopted, dynamic nonlinear analysis is performed through external circulation, and the stiffened topology and the fiber direction are cooperatively optimized under the equivalent static load through internal circulation, so that the stiffened structure topology distribution and the fiber direction distribution are obtained; then, the B-spline parameter field is mapped to a physical space reconstruction grid, and the topological and fiber direction representation of the physical space is obtained; finally, a continuous path planning algorithm based on a vector field is used to generate a one-stroke continuous printing path. The application solves the problem that the existing method is difficult to consider dynamic impact response modeling, fiber path continuity control and additive manufacturing process constraints, and cooperatively improves the impact resistance performance and manufacturability.

In a traditional bearing cap, the temperature of the oil-wetted surface that defines the oil sump may experience high temperatures, which can result in oil degradation, oil varnish, and coking. Accordingly, a bearing cap (300) is disclosed that reduces the temperatures experienced by the oil-wetted surface (420). In particular, the bearing cap (300) may comprise one or more air insulation cavities (430), between the surface (410) that is exposed to heated air and the oil-wetted surface (420) that defines the oil sump (425), to provide a thermal barrier between the two surfaces.

The present application provides an aircraft additive manufacturing method. The method comprises: designing a three dimensional digital model of an aircraft; setting a design separation interface on the three dimensional digital model so as to divide the three dimensional digital model into three dimensional digital models of modules; setting a process separation interface on the three dimensional digital models of the modules so as to divide the three dimensional digital models of the modules into three dimensional digital models of segments; performing slicing processing on the three dimensional digital models of the segments and setting printing parameters to generate printing data; using a 3D printer to perform printing on the basis of the printing data to generate segments; assembling the segments to form modules; and assembling the modules to form the aircraft. The present application further provides an aircraft.

The application provides a metal organic framework material patterning additive manufacturing method, and relates to the technical field of additive manufacturing.The application proposes a new strategy of MOF micro-nano additive manufacturing based on mechanical chemical fixation and hydrothermal conversion, and the application utilizes the mechanical friction effect of a friction pair on the surface of a base material to fix metal oxide precursor micro-nano structures in a preset track in a directional and quantitative manner, so as to form an accurate patterned prototype; then, the fixed precursor is reacted with an organic ligand through a hydrothermal reaction, so as to be directionally converted into a corresponding MOF structure.The application implements the patterning construction of the precursor and the conversion of the MOF in steps, so as to not only ensure the fineness of the precursor structure, but also ensure the sufficiency and crystallinity of the MOF conversion.The whole process does not need a mask, does not need electron beam exposure, and does not need a developing solution treatment, has low requirements on equipment, is simple to operate, has a cost significantly lower than that of a traditional photolithography technology, and has good material universality and base adaptability.

The application discloses a metal corrosion pit removal machining surface generation method, which comprises the following steps: acquiring a corrosion pit point cloud of a metal surface to be repaired, and processing the corrosion pit point cloud to obtain a point cloud section line and a point cloud guide line of the corrosion pit; constructing a parameterized base surface of the corrosion pit; adjusting the parameterized base surface according to the point cloud section line and the point cloud guide line to generate an initial machining surface; taking the control point coordinates in the initial machining surface as optimization variables of a UG optimizer, taking cold spray additive manufacturing requirements as optimization constraints, taking the minimum average value of the sum of the minimum distances from each point of the corrosion pit to the initial machining surface as an optimization objective function, and iteratively adjusting the control points of the initial machining surface by using the UG optimizer to solve, so as to generate a final machining surface. The final machining surface obtained by the application not only meets the cold spray additive manufacturing process requirements, but also is close to the corrosion pit shape, thereby shortening the cold spray additive repair time of the part.

The present application relates to the technical field of metal additive manufacturing, and aims at the problem of uneven pore size distribution and serious fine powder gasification and splashing in the existing additive manufacturing method for preparing porous structure materials, and provides a uniform porous structure material prepared by multi-pass scanning additive manufacturing and a preparation method thereof, which comprises the following steps: S1, an entity model of a space enveloped by the porous material is established, and slicing and layering are performed to obtain a plurality of model slices; S2, metal powder is laid into a powder layer, and then a laser powder bed additive manufacturing equipment is used to perform first-pass preprocessing scanning on the model slices, increase the high laser power, reduce the scanning speed, and perform second-pass forming scanning on the model slices to obtain the uniform porous structure material prepared by multi-pass scanning additive manufacturing.The present application fundamentally solves the problem of mismatch between the Gaussian distribution laser beam and the normal distribution powder particle size, can stably prepare uniform connected pores, and does not need subsequent powder cleaning treatment.

The application discloses an integrated 3D printing galvanometer system and belongs to the field of additive manufacturing. Aiming at the problems existing in the traditional 3D printer galvanometer, such as large volume caused by the outer shell and the cooling system, light field splicing deviation caused by installation and debugging difference, high cooling power consumption, pipeline complexity and easy leakage, and condensate water damage to equipment in high humidity environment, etc. The system of the application contains a galvanometer, a laser head array, a fixed base plate and other components. The galvanometer contains X and Y sub-galvanometers arranged vertically, and a laser head. Each component is fixed on a high-precision fixed base plate. The shell is sealed, one side of the metal surface is provided with an inner and outer fan and a cooling device (such as a semiconductor heat sink), and a detachable and replaceable desiccant box is further arranged. The application has the beneficial effects of compact volume, low energy consumption, high splicing precision and condensation prevention, and is suitable for medium and large 3D printers using multiple galvanometers.

An apparatus for additive manufacturing includes a particle beam providing module and a removable build module. The removable build module includes: a build tank including walls; at least one powder supply tank; and a recoating arrangement arranged to recoat the build tank with powder from the at least one powder supply tank. The particle beam providing module and the removable build module together form a vacuum chamber when the removable build module is attached to the particle beam providing module in the apparatus, so that the walls of the build tank form a barrier part of the vacuum chamber.

The application belongs to the technical field of additive manufacturing, and particularly relates to an intelligent 3D printing system, which comprises a rack and a controller, the inside of the rack is provided with a laser printing head and a powder laying mechanism, the powder laying mechanism lays powder, and then the laser printing head melts the powder by laser to complete the action of cladding. The intelligent 3D printing system can utilize forward mapping to output the trained network in seconds or even milliseconds, greatly accelerating the real-time simulation effect of design iteration. Meanwhile, the neural network can replace time-consuming finite element calculation in the optimization process of genetic algorithm, and quickly find the optimal design parameters, thereby achieving the effect of optimization design. On the other hand, the backward mapping is used to quickly and accurately identify the complex material model parameters, which is several times faster than the traditional trial-and-error method, and the input or physical characteristics of the system can be back calculated according to the dynamic response of the structure.

The invention relates to a method for manufacturing a part made of composite material, the method comprising at least the following steps: - a step (E1) of preparing a feedstock comprising ceramic material fibers and a binder; - a step (E2) of preparing a preform having the shape of the part to be obtained by additive manufacturing of the prepared feedstock; - a step (E3) of consolidating debinding of the preform; - a step (E4) of forming an interphase by chemical vapor infiltration of the debindered preform; then - a step (E7) of forming a ceramic matrix in the porosity of the preform.

The application relates to the technical field of space electric propulsion, and particularly discloses an ion thruster anode assembly integrated structure design optimization method based on additive manufacturing, which comprises the following steps: determining the external size of a discharge chamber gas distribution ring in combination with input parameters of an ion thruster discharge chamber; calculating the circumferential pressure distribution of the gas distribution ring; completing the design of the number of apertures and the size of the gradually-changing apertures in combination with the pressure distribution and aperture diameter matching; designing a bidirectional spiral pressurizing flow channel; carrying out simulation analysis on the gas uniformity in combination with CFD; and finally, carrying out integrated modeling design and forming processing on the pressure gradient compensation type ion thruster anode and the gas distribution ring based on additive manufacturing. The application aims at the core requirement of the circumferential gas supply uniformity of the ion thruster discharge chamber, realizes the balanced distribution of the gas through flow channel pressure compensation and gradually-changing aperture reverse adjustment, overcomes the problem of the circumferential gas supply unevenness caused by the flow channel pressure gradient of the traditional gas distribution ring, and realizes the uniform gas supply in the ion thruster discharge chamber.

This invention discloses a point cloud-based method for multi-component positioning and cross-section extraction in arc additive manufacturing, relating to the fields of additive manufacturing and digital inspection. The method includes: acquiring an original 3D point cloud containing a substrate and multiple additive components; identifying the substrate's principal plane to construct a global spatial reference, resulting in a globally aligned point cloud; separating the substrate point cloud and component point clouds to obtain a multi-component point cloud set; performing spatial connectivity analysis and segmentation on the multi-component point cloud set to obtain multiple independent component point clouds corresponding to a single component; performing principal direction identification and attitude standardization processing to obtain component point clouds under standard attitudes; and based on the component point clouds under standard attitudes, determining the cross-section position and extracting the point set within the cross-section's neighborhood to generate cross-section point cloud data characterizing the component's cross-sectional morphology. This method automates the processing from the original point cloud to standardized cross-sectional features, improving the accuracy and consistency of multi-component identification and cross-section extraction in arc additive manufacturing.

This invention provides a method and apparatus for interface control in steel-aluminum dissimilar metal additive manufacturing, relating to the field of additive manufacturing technology. The method mainly includes: acquiring current process parameters and performing additive manufacturing based on these parameters; acquiring interface temperature field data during the manufacturing process; determining temperature characteristic parameters based on the interface temperature field data; inputting the temperature characteristic parameters into a prediction model to obtain interface brittle phase characteristics; determining the interface bonding strength based on the interface brittle phase characteristics; responding to the interface bonding strength not meeting a preset threshold, calling a reverse adjustment model to determine the process parameter adjustment amount; and adjusting the additive manufacturing process parameters based on the process parameter adjustment amount. This invention enables proactive and precise control of the morphology and layer thickness of the interface brittle phase, thereby improving the interface bonding strength.

This invention provides a method for forming and preparing high-alloyed high-temperature alloy powder that can be used in multiple processes. To address the problems of traditional high-alloyed high-temperature alloys having limited applications, high R&D costs, and incompatibility between different processes and materials when applied in multiple fields, this method carefully balances alloying elements and controls matching forming process parameters. This improves the adaptability of the alloy to various forming processes while maintaining good mechanical properties. The alloy powder can be simultaneously used for wide-gap brazing support materials, hot isostatic pressing, and additive manufacturing. Characterization is performed using a combination of various testing and characterization methods, and the results are comparable across different processes. The results show that the alloy prepared by the forming method provided in this application has uniform and fine dendrites and grains, low porosity, good thermal stability, and possesses high mechanical properties and good forming process performance.

This invention relates to a temperature control device and system for die-casting automotive aluminum-magnesium alloy parts, belonging to the field of automotive parts manufacturing technology. It includes a layered temperature measurement module, a zoned heating module, a zoned conformal cooling module, and a main control unit. The layered temperature measurement module is distributed on the surface of the cavity, in the runner, and deep within the mold base. Surface temperature sensing points are integrated into movable hollow ejector pins to eliminate temperature measurement hysteresis and resist injection impact; deep temperature sensing points are equipped with elastic pre-tightening mechanisms to eliminate contact thermal resistance. The zoned conformal cooling module is formed using additive manufacturing, with its three-dimensional flow channel trajectory conforming to the cavity contour and evenly distributed, combined with proportional valves and dual-parameter monitoring of flow and pressure. This invention achieves multi-dimensional precise temperature control from local to macroscopic levels, eliminating heat exchange dead zones and "heat spots" in complex deep cavities, effectively avoiding defects such as casting shrinkage cavities, and improving yield.

This invention relates to the design of an additive manufacturing machine for test specimens for architectural constructions. This machine is designed to assist civil engineering laboratory personnel in 3D printing construction samples of various shapes, structures, and materials in order to test their performance. It can also be used for research and development of 3D-printed structures and / or for the manufacture of decorative elements and panels. The machine is equipped with three motorized carriages (longitudinal, transverse, and vertical), which are mobile relative to the chassis, allowing for precise positioning of the injection nozzles. These nozzles can operate separately or simultaneously to inject different construction materials. Each of the three injection nozzles has a separate feed system for the construction materials. The machine is electrically powered and equipped with a propulsion system. An onboard electronic module manages the system's operation.