97 results about "Laser additive manufacturing" patented technology

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.

This invention belongs to the field of laser cladding and laser additive manufacturing, specifically relating to a synchronous water-cooled laser cladding head and method based on co-channel photon and powder. The head includes a cladding head body, on which a laser head interface, a photon channel structure, a metal powder channel, and a cooling water channel structure are disposed. The laser head interface and the photon channel structure are vertically connected, and the metal powder channel is connected to the photon channel. The cooling water channel structure comprises an inlet channel, an annular cooling cavity, and an outlet channel arranged sequentially from top to bottom. The annular cooling cavity surrounds the photon channel structure, and the outlet channel sprays cooling water onto the substrate to cool it. This invention uses an externally placed water-cooling channel to form an annular water curtain, effectively reducing the adverse effects of heat accumulation during the cladding process.

This invention belongs to the field of laser additive manufacturing technology, specifically relating to a dual-spot parallel scanning additive manufacturing system and method. A laser generation unit dynamically distributes a laser beam to the first and second optical paths according to a preset energy ratio through polarization beam splitting. The spot generation unit uses two spatial light modulators to modulate the two beams into patterned spots and dot spots respectively. The filtering and imaging unit filters and images the two beams. The parallel scanning unit drives the dual spots to scan synchronously on a powder bed. The control unit performs model slicing and patterned region segmentation, and dynamically allocates energy and synchronously controls all units to work together based on the segmentation results. This achieves a single laser, dual optical paths, irregularly shaped spots, and parallel scanning, simultaneously balancing processing efficiency and forming accuracy, effectively solving the technical problem of traditional single-spot methods that struggle to achieve both efficiency and accuracy.

This invention belongs to the field of laser additive manufacturing and surface engineering technology, and discloses a ternary boride Mo2NiB2 cermet and its preparation method, as well as an alloy barrel and its preparation method. The ternary boride Mo2NiB2 powder of this invention generates a stable, uniformly dispersed, high-hardness ternary boride hard phase in situ during the cladding process, endowing the alloy layer with excellent resistance to abrasive wear and corrosion. Simultaneously, a collaborative technical equipment system is formed by combining specialized internal hole laser cladding equipment, specially prepared ternary boride Mo2NiB2 cermet powder, and an optimized process integrating synchronous preheating, to overcome the technical bottleneck of internal wall cladding and ensure the acquisition of a dense, firmly bonded, and uniformly performing reinforced layer.

This invention specifically relates to a performance testing method for laser cladding repair, encompassing the fields of laser additive manufacturing and non-destructive testing. The method includes: screening tracer particles based on three criteria: high physical field contrast, high-temperature thermal stability, and rheological compatibility; determining the tracer particle ratio; preparing uniform composite powder; verifying mixing uniformity; and standardizing powder pretreatment and storage. In this invention, tracer particles with high physical field contrast are introduced, and a direct mapping model between signal intensity and dilution rate is constructed using the law of conservation of solute mass. Normalization calculations eliminate interference from instrument response coefficient drift, enabling the method to penetrate the cladding layer surface and directly quantify the component mixing ratio within the molten pool. This not only achieves a leap from qualitative judgment to quantitative measurement but also replaces fuzzy empirical judgments with explicit physical laws, providing a non-destructive, high-confidence, and fully physically interpretable in-situ characterization method for laser repair quality.

This invention discloses a laser additive manufacturing method for repairing metal defects based on modularization and normalization of regular geometric shapes. The method includes: first, obtaining a three-dimensional digital model and feature dimensions of the defect using non-destructive testing; second, selecting a regular hexagon or an elongated hexagon as the standard unit to enclose the defect according to its characteristics, thereby normalizing the geometric boundary and determining the repairability of the metal component; third, removing the defect through machining to form a repairable area with a horizontal bottom surface and a gradually increasing cross-section along the opening direction of the sidewalls; and finally, planning a laser path for the repairable area and using laser additive manufacturing technology to complete the filling and repair. This invention transforms random, irregular defects into standard, regular geometric shapes, eliminating path fitting errors and local heat accumulation caused by traditional circular envelopes, effectively suppressing the generation of secondary defects, and improving the standardization and quality of the repair operation.

The present application relates to the technical fields of additive manufacturing equipment, and provides a powder spreading assembly and a laser additive manufacturing equipment.The powder spreading assembly comprises a base, a powder spreading box and a powder outlet gap adjusting module; the base is configured to be movably arranged along an X direction on a workbench of the laser additive manufacturing equipment; the powder spreading box is arranged on the base, and a bottom of the powder spreading box is provided with a powder outlet gap along a Y direction; the powder outlet gap adjusting module comprises two powder outlet gap adjusting units; each powder outlet gap adjusting unit comprises a sliding block, a gap covering belt and a driving mechanism; the sliding block is movably arranged along the Y direction on the powder spreading box, and a free end of the gap covering belt is connected with the sliding block; in a working state, the free end of the gap covering belt is located below the powder outlet gap, and is used for covering at least part of the powder outlet gap.The powder spreading assembly and the laser additive manufacturing equipment provided by the present application solve the defects that the existing laser additive manufacturing equipment needs to remove excess powder after each powder spreading and heat treatment in the machining process, and the operation is complex and the efficiency is low.

This invention relates to a method for manufacturing high-silicon Fe-based magnetic media using a remelting-rescanning strategy via laser 3D printing, belonging to the fields of advanced manufacturing and mineral magnetic separation. This invention uses high-silicon Fe-based magnetic media powder as raw material. During laser additive manufacturing, the same powder layer is scanned multiple times. After the initial melting, the layer is scanned at least once more using the same laser scanning path, resulting in the high-silicon Fe-based magnetic media. This invention inherits the additive manufacturing characteristics of selective laser melting technology, effectively solving the bottlenecks of extremely brittle processing and geometric limitations in traditional manufacturing processes. Furthermore, it enables personalized customization of the shape and structure of complex high-frequency magnetic media, providing a new approach for manufacturing high-performance high-silicon Fe-based magnetic media. The process of this invention is simple and controllable, and the resulting product has superior overall performance, facilitating large-scale industrial applications.

The application relates to an alloy powder with super-high electromagnetic shielding performance and a preparation method and application thereof, and belongs to the technical field of laser additive manufacturing. According to mass fraction, the chemical component composition of the alloy powder comprises the following components: Fe: 50%-60%, Co: 20%-30%, Ni: 2%-10%, Cu: 1%-2%, Mo: 2%-5%, Si: 2%-5%, B: 1%-6%, Y: 0.1%-0.5%, La: 0.1%-0.5%, and Nd: 0.1%-0.5%. The obtained alloy shows excellent soft magnetic performance and electromagnetic shielding performance, is suitable for laser additive manufacturing of K-waveband key equipment parts in the field of 5G communication, and has important application prospects in the fields of electromagnetic shielding of high-end equipment key parts such as communication and aerospace.

This invention belongs to the field of metal additive manufacturing technology, specifically relating to a structural design and manufacturing method for endogenous heterogeneous topology toughening using laser additive manufacturing. The method includes the following steps: S1. Selection of matrix material and testing of heterogeneous performance ranges; S2. Design of endogenous heterogeneous topology toughening structure; S3. Additive forming of the endogenous heterogeneous topology toughening structure. This invention improves material strength and toughness by using topology toughening units to achieve crack deflection, branching, strain distribution, and stress concentration mitigation. It actively designs heterogeneous topologies by simulating the stress distribution of components, and uses simulation to predict the performance of heterogeneous components in advance. Integrated forming shortens the component manufacturing cycle by more than 30%, and simulation-aided design and configuration optimization shorten the R&D cycle by more than 40%.

This invention relates to the field of high-nitrogen duplex stainless steel preparation technology, and provides a method for preparing high-nitrogen duplex stainless steel. The method for preparing high-nitrogen duplex stainless steel provided by this invention involves placing stainless steel powder with a nitrogen content of 0.6 wt% or greater into a laser additive manufacturing apparatus for molding. During the molding of the high-nitrogen duplex stainless steel, the laser power is set to 150W-350W, the laser scanning spacing is 60-150 μm, the laser scanning layer thickness is 30-65 μm, and the laser scanning rate is 200-1200 mm / s. During molding, the material solidification rate is 10... 5 -10 7 K / s. This invention utilizes laser additive manufacturing to produce 10 5 -10 7 K / s ultra-fast solidification of the alloy matrix, with w(N)≥0.6% supersaturated solid solution in the alloy matrix, without Cr2N precipitation, enables PREN to exceed 50 and reach 52 or more.

This invention relates to the field of titanium alloy materials, specifically to an additive manufacturing method for a high fatigue strength Ti4Mo6Zr2Fe5Cu0.25O alloy and its preparation method. The chemical composition of this titanium alloy, by weight percentage, is: Mo: 3.0–5.0; Zr: 4.0–8.0; Fe: 1.0–3.0; Cu: 3.0–7.0; O: 0.10–0.40; with the balance being Ti. The preparation method of this titanium alloy is as follows: the titanium alloy is prepared using coaxial powder-feed laser additive manufacturing technology, with a laser power between 1500 and 3100 W, a scanning rate between 700 and 1500 mm / min, and an interlayer spacing of 0.4–1.2 mm. The titanium alloy prepared by this invention possesses excellent comprehensive mechanical properties and can be widely used in many important fields such as aerospace, biomedicine, petrochemicals, automotive industry, and marine engineering.

A spinning additive composite processing method with outer lug cylinder, which makes full use of the technical advantages of spinning technology in processing thin-walled rotary parts and the advantages of additive manufacturing technology in local forming, so as to realize efficient and low-cost processing of the cylinder with unequal wall thickness and lug. In view of the shortcomings of the traditional spinning + additive manufacturing method, the invention adopts a split support, accurately controls the laser additive manufacturing parameters, and controls the deformation of the cylinder during the additive process; the additive part is cooled in real time during the laser additive process, which overcomes the problem of coarse grains and ensures the mechanical properties of the additive part, effectively solves the problems of size limitation, high cost, and large deformation of the outer surface of the cylinder during local additive manufacturing, and effectively controls the deformation of the cylinder.

The application discloses a kind of laser additive manufacturing in-situ solution and grading aging method, belong to metal additive manufacturing and heat treatment technical field.The application constructs main and vice laser time multiplexing dual optical path processing system, and three core procedures of laser additive manufacturing formation, in-situ solution, grading aging are integrated in the same equipment cavity and are continuously completed;Through the scanning of vice laser after layer forming, infrared temperature measurement, PID temperature control, the solution treatment of the formed region is completed synchronously, and then the two-stage in-situ heat treatment of homogenization spot pre-aging and Gaussian spot high-peak aging is completed in sequence.The application relieves the pain points of long offline heat treatment process flow, easy deformation of component, grain easy coarsening and significant performance anisotropy of traditional additive manufacturing, realizes the precise control of microstructure of metal component throughout the process and the synergistic improvement of high plasticity, greatly shortens the production cycle and reduces the manufacturing cost, and can be widely applied to the preparation of metal components in the fields of aerospace, automobile and rail transit.

The application discloses a high-speed secondary melting method for improving the performance of laser additive manufacturing aluminum alloy, first, the optimal process parameters are used for preliminary melting of the powder bed to obtain a cladding layer with good density and apparent quality; second, the laser power and scanning rate are improved to perform secondary melting on the solidified surface to improve the microstructure of the solidified surface; then, powder is re-paved and the above process is repeated to obtain a final formed test piece. The method considers the heat accumulation of the primary laser melting in the heat transfer numerical simulation process, so that the solid-liquid interface solidification parameter prediction of the high-speed secondary melting process is closer to the actual situation. The method uses the high-power and high-scanning-rate laser to perform layer-by-layer secondary melting on the solidified surface for the first time to in-situ regulate the microstructure of the formed component, so that the comprehensive mechanical properties of the formed component are improved.

This application discloses a path planning method, equipment, and medium for laser additive manufacturing-conformal rolling composite forming, relating to the field of laser additive manufacturing. The method includes: acquiring a layered contour of the part to be formed; dividing the layered contour into a contour trajectory according to a preset offset distance; determining the outer bounding region of the contour trajectory; obtaining a forming direction transformation strategy based on projection parameters of the contour trajectory within the outer bounding region; constructing a straight-line filling trajectory within the contour trajectory based on the projection parameters and preset spacing parameters; and combining the contour trajectory and the straight-line filling trajectory into an actual forming trajectory according to the forming direction transformation strategy, so that a forming equipment can perform composite forming based on the actual forming trajectory. This application achieves the technical effect of improving the forming quality of metal parts by using the contour trajectory and the straight-line filling trajectory for path planning of the dimensional region of the part to be formed.

This application discloses a method for printing copper-based liquid cooling components via grafting, and the copper-based liquid cooling component itself. The method includes: providing a base plate; machining positioning grooves on the base plate according to its external dimensions; etching the inner walls of the positioning grooves; sandblasting the upper surface of the base plate; embedding the sandblasted base plate into the positioning grooves; selectively laser melting the base plate; sequentially printing the bonding surface layer and the heat dissipation fin body layer using different printing strategies to obtain a blank; removing the blank from the positioning grooves and polishing it to obtain the copper-based liquid cooling component. This method solves the technical problems of base plate warping, low internal density, loose structure, and poor bonding surface strength in traditional laser additive manufacturing of copper-based liquid cooling components, achieving stable manufacturing of high-precision, high-performance copper-based liquid cooling components.

This invention provides an in-situ rapid preparation method for a nickel-based alloy turbine disk with high microstructure and uniformity, relating to the field of nickel-based superalloy technology. The method includes the following steps: modeling the nickel-based alloy turbine disk using 3D digital software to form a turbine disk model, and simultaneously reverse-engineering the mold shape of the turbine disk; slicing the turbine disk model, forming a complete printing path in a laser additive manufacturing device, and performing 3D printing on the mold; after printing, moving the mold as a whole to a vacuum isothermal forming device for vacuum isothermal forging, and automatically demolding to obtain a precision forged turbine disk; heat-treating and machining the forging to obtain the nickel-based alloy turbine disk. This invention combines the advantages of precise 3D printing and vacuum isothermal precision forming, solving the problems of solidification defects and microstructure in printed parts, achieving in-situ precision forming, enabling automated and standardized processes, improving product production efficiency, yield, and material utilization, and possessing significant commercial value.

The present application belongs to the technical field of additive manufacturing, and particularly relates to an in-situ heat treatment method and device for laser additive manufacturing of nickel-based superalloy. The present application uses laser additive manufacturing technology to prepare nickel-based superalloy. In the process of laser additive manufacturing, the heat treatment temperature in the heat affected zone is tracked in real time, the magnetic field is controlled to act on the heat affected zone of the nickel-based superalloy, and in-situ heat treatment is performed by using the residual heat of the heat affected zone, without the need to separately introduce other heating sources. The present application introduces a transverse static magnetic field or a transverse alternating magnetic field for in-situ heat treatment, so as to regulate and control the microstructure, element distribution and precipitate size of the nickel-based superalloy, reduce composition segregation and residual stress, and avoid the generation of cracks in the nickel-based superalloy.

This invention discloses a laser coaxial wire feeding additive repair device and method for the inner wall of pipe fittings, belonging to the field of laser additive manufacturing. The laser coaxial wire feeding additive repair device for the inner wall of pipe fittings includes a light guide arm, a four-beam laser head, and a wire feeding mechanism. The light guide arm is mounted on a robotic arm; one side of the light guide arm is connected to an optical cable, and the other side is tightly connected to the laser head via a bayonet. A wire feeding mechanism is fixed above the light guide arm, and multiple functional pipes, including cooling water pipes, protective gas pipes, and signal lines, are fixed below it. The laser head divides the laser beam introduced by the light guide arm into four beams distributed in a square shape through a lens group, and the four beams converge below the wire feeding head through a focusing lens. The focusing lens is installed in an anti-roll cage inside the laser head, and its up-and-down movement is controlled by a servo motor to change the laser focus position. A high-curvature wire feeding tube is placed inside the laser head, without interfering with the laser beam. The laser coaxial wire feeding additive repair device for the inner wall of pipe fittings described in this invention can realize laser coaxial wire feeding additive repair manufacturing of the inner wall of pipe fittings, improving the quality and efficiency of inner wall repair.

This invention provides a laser additive manufacturing method and a liquid nitrogen cryogenic control system for melting filaments with a laser beam, relating to the field of laser additive manufacturing technology. The laser additive manufacturing method includes the following steps: cooling a substrate until a target processing temperature is reached; wherein the target processing temperature is set within the range of -130°C to -100°C; when the substrate reaches and stabilizes at the target processing temperature, initiating the laser additive manufacturing process; and completing the laser additive manufacturing process while maintaining the target processing temperature. Laser additive manufacturing performed within the target processing temperature range of -130°C to -100°C results in a substrate bottom of the additively manufactured part achieving a hardness of 80 HV0.3, which is approximately 40% higher than conventional water cooling (57 HV0.3). This effectively solves the technical problems of substrate thermal deformation and low hardness in existing WL-DED technology, ensuring the processing quality of the additively manufactured part.

This invention relates to a beam expanding system for laser additive manufacturing, belonging to the technical field of laser additive manufacturing equipment. It solves the technical problem that current beam expanding systems in the optical systems of laser additive manufacturing equipment cannot change the shape and size of the output beam. The beam expanding system for laser additive manufacturing includes a first beam expanding module and a second beam expanding module arranged sequentially along the optical path. Both the first and second beam expanding modules include a fixed group, a zoom group, and a compensation group, arranged sequentially along the optical path and composed of multiple cylindrical mirrors. The cylindrical generatrices of the cylindrical mirrors in the first and second beam expanding modules are perpendicular to each other, and the optical axes of the cylindrical mirrors in the first and second beam expanding modules coincide with or are parallel to each other. Therefore, this beam expanding system for laser additive manufacturing can achieve output beams of different sizes (circular) or different ellipticities to meet different processing requirements.

The application provides a laminated array hole metal foil powder laying composite material manufacturing method, and belongs to the field of additive manufacturing.The metal foil with a certain number of holes is used as the base material of the composite material, metal, ceramic and other powders are laid in the holes as the reinforcing body for lamination, digital slicing processing is used for integral forming, additive manufacturing is realized through sintering, and the composite material product is formed through diffusion reaction.The powder splashing in the laser additive manufacturing process is prevented, the forming quality of the parts is improved, the metal matrix composite material is anisotropic, the performance and realized function of each part are different, the application scene is greatly increased, the laminated additive manufacturing process is optimized, the cost and time are saved, the manufacturing speed is fast, the comprehensive mechanical properties of the manufactured composite material are excellent, meanwhile, the remaining base material and reinforcing body material are not mixed, the raw material recovery rate is high, and the cost of additive manufacturing is effectively reduced.

This invention discloses a multiphase composite reinforced copper alloy powder for laser additive manufacturing, its preparation method, and its application. The multiphase composite reinforced copper alloy powder comprises the following components by mass percentage: Cr: 0.10–2.13%; Nb: 0.09–1.90%; Ti: 0.47–1.03%; N: 0.13–0.30%, with the balance being Cu and unavoidable impurities. This invention, through rational design of the copper alloy powder composition and the addition of low-solid-solution components, generates a reinforcing phase through in-situ reaction using a gas atomization method, preparing a copper alloy powder with high laser absorption rate. This powder is then applied to laser additive manufacturing to obtain copper alloy formed parts. These formed parts exhibit excellent laser absorption rate, thermal conductivity, and high-temperature performance, and can be used in the preparation of aerospace engine materials.

This invention provides a dual-precision movement control mechanism for a powder feeding head in laser additive manufacturing. It includes a base assembly, X-axis movement components, Y-axis movement components, Z-axis movement components, a powder feeding head assembly, and an indicator component. The X-axis, Y-axis, and Z-axis movement components all use a combination of lead screws and cylindrical cams to control the position of the powder feeding head assembly, enabling rapid movement of the powder feeding head along the X, Y, and Z axes. A fine-tuning device allows for precise control of the powder feeding head position. The indicator component displays the real-time position of the powder feeding head, facilitating adjustment. This invention features a novel structure, ease of manufacture, and flexible operation, enabling rapid and precise adjustment of the powder feeding head position, thus improving the quality and efficiency of laser powder feeding additive manufacturing.

The present application relates to a kind of efficient forming process suitable for the dense crack-free additive manufacturing of difficult-to-weld nickel-based superalloy, belongs to the technical field of metal additive manufacturing.The process simulates and determines the effective interval of laser power and scanning speed of difficult-to-weld nickel-based superalloy shaping laser additive manufacturing process through shaping laser molten pool flow-heat coupling model, then optimizes the parameters of laser power and scanning speed using response surface method, obtains the optimal process parameter combination and performs shaping laser forming, and obtains high-density and crack-free difficult-to-weld nickel-based superalloy parts.The present application solves the problems of easy cracking, many pores and low efficiency of process optimization of difficult-to-weld nickel-based superalloy through the cooperation of shaping laser and efficient parameter optimization, can stably prepare parts with density of more than 99%, no cracks, shorten the optimization cycle, reduce the cost, meet the stringent requirements of high-end equipment, and the technology is advanced and has significant application value.

The application provides an optimization design method of additive manufacturing process parameters based on machine learning, which can realize rapid and accurate prediction of product forming quality under any process parameters for a wide range of material systems by establishing an additive manufacturing process parameter-material performance gradient boosting regression tree (GBDT) model and double optimizing the model hyperparameters by using random search (RS) and K-fold cross validation (K-CV) algorithms, so as to quickly and accurately determine the best process parameters, and solve the problems of high calculation and test cost and long cycle in the optimization of the process parameter window of laser additive manufacturing.