55 results about "Melt pool" patented technology

The invention relates to the technical field of additive manufacturing, and discloses an additive manufacturing hot-crack-free precipitation strengthening high-temperature alloy and a preparation method thereof.The method comprises the steps that a laying layer is divided into a plurality of parallel scanning strips according to the preset translation direction and the scanning strip interval, strip type scanning is conducted in a laser autorotation and translation motion coupling mode, and the high-temperature alloy is obtained; molten pool disturbance is remarkably enhanced, periodic shear fracture of the tip of dendritic crystal is achieved, epitaxial growth of columnar crystal is broken, grain equiaxalization is achieved, and anisotropy is weakened; in addition, laser scanning is a high-speed scanning strategy with the translation speed larger than or equal to 1500 mm / s, a shallow molten pool is formed through regulation and control of the high scanning speed, surface tension in the shallow molten pool is utilized, convection in the molten pool is enhanced, dendritic crystals are refined, columnar crystals in the high-temperature alloy are further reduced, and anisotropy of mechanical properties is remarkably eliminated; and the transverse strength and creep resistance at high temperature are improved. The isometric crystals can effectively prevent cracks from expanding in the orientation direction of the columnar crystals, and the fatigue life and the damage tolerance are remarkably prolonged.

The invention discloses a glass kiln bottom temperature control method and system and a glass kiln, and belongs to the technical field of glass kilnes.Temperature information of each detection point is obtained from a plurality of detection points between the bottom of a melting pool and a working pool, and deviation and trend related to the temperature of the detection point are calculated according to the temperature information; the deviation of all the detection points is subjected to weight calculation to obtain the comprehensive deviation of the temperature, the trend of all the detection points is subjected to weight calculation to obtain the comprehensive trend of the temperature, the arch top temperature adjustment amount is obtained through the comprehensive deviation and the comprehensive trend calculation, and control linkage of the pool bottom temperature and the arch top temperature is achieved. After the target temperatures of a plurality of detection points are manually set, the pool bottom temperature and the arch top temperature control are automatically adjusted and fed back, so that the dependence of pool bottom temperature adjustment on manual trend judgment is reduced, the pool bottom temperature is automatically controlled, the stability of the pool bottom temperature is improved, and the fluctuation range of the glass liquid temperature is further reduced.

A processing system includes: a processing apparatus for processing an object by irradiating the object with an energy beam to form a melt pool on the object and supplying a build material to the melt pool; an imaging apparatus for imaging the melt pool to generate a melt pool image; and a control apparatus for generating melt pool image information based on the melt pool image and for controlling the processing apparatus based on the melt pool image information so that a size of the melt pool is a target size, the melt pool image information is generated based on a plurality of melt pool images, the control apparatus changes, based on a processing condition of the object, an imaging condition for the imaging apparatus imaging the melt pool.

The invention discloses a selective melting beam shaping and residual stress regulation cooperation method and system, and belongs to the technical field of selective melting additive manufacturing. The method comprises the steps that slicing data of a to-be-formed part are obtained, and characteristic parameters of all areas are analyzed; light beam spot parameters are adjusted in real time through a dynamic light beam shaping module based on the characteristic parameters; in the forming process, stress associated data of a molten pool and a heat affected zone are collected through a multi-dimensional stress monitoring module; the cooperative control unit analyzes the data based on a preset correlation model and judges stress abnormity; if yes, light spot parameter adjustment and stress regulation and control operation are synchronously controlled; and subsequent forming parameters are corrected through a closed-loop algorithm. The system comprises corresponding function modules and a process database. According to the method, light beam shaping and residual stress regulation are coordinated, the residual stress of parts is effectively reduced, deformation and cracking are reduced, the forming precision and the production efficiency are both considered, the process stability is improved, and the adaptation range of materials and complex structures is widened.

A schlieren system for in-situ / online monitoring of spatter in a large-area melt pool is provided, including a parallel light generation part, a parallel light deflection part, and an image acquisition part. The system can monitor spatter and other physical phenomena in the melt pool in a process of multi-layer printing and adjust a monitored area during an experiment to expand a monitored range. A reflector group composed of a plurality of plane mirrors is arranged, such that an optical path can be kept away from powder and dust areas, avoiding interference between the schlieren system and inherent devices inside a build chamber. Communication between a laser path controller and an optical path deflecting mirror galvanometer motor controller is established to automatically control the plane mirrors to change the monitored area, automatically track the melt pool, and realize online monitoring.

The invention relates to the technical field of solid waste harmless and recycling equipment, in particular to a gradient temperature pyrolysis-melting vitrification integrated treatment device and process for red mud. According to the device, an electromagnetic heating rotary kiln pyrolysis section and an electrode melting section are directly coupled with a material transfer device through high-temperature atmosphere isolation. The process comprises the following steps: granulating red mud, a reducing agent and a flux, feeding into a rotary kiln of which the temperature is accurately controlled by multiple groups of electromagnetic induction coils in a partitioned manner, and sequentially completing dehydration, selective reduction and iron particle polymerization to produce gt; high-temperature pyrolysis slag at 1000 DEG C; the pyrolysis slag directly falls into an electric melting pool to complete melting and iron-slag liquid phase separation under absolute isolation of reducing atmosphere and oxidizing atmosphere by the device, and pig iron and a stable glass body are respectively obtained. Through the design of'hot slag direct melting 'and'energy closed loop', the problems of high energy consumption and complex flow of the traditional process are solved, and efficient recovery of iron resources in the red mud and thorough harmless and high-valued utilization of the residues are realized.

An automated method of measuring, monitoring and recording candle burn performance using vision system automation. The method includes timed candle flame height measurement consisting of a camera using image bursts. Recording in a database with a unique identifier barcode for each candle and corresponding wick to identify and record candle data with a date and time stamp. Audio-Visual alerts for flame callouts less than ½ inch or greater than 2 inches and 3″. Documenting any extinguished candles / wicks (mid and / or end of life). Candle Temperature Measurement is performed every 2 hours (depending on burn type and cycle), which includes wax melt pool temperature (with callouts for temperatures reaching and / or exceeding 250 deg C.) and container side wall temperature. Candle Picture is performed at the mid and end of life, and the sustainer position is tracked to determine wick migration.

The utility model relates to a glass kiln pool wall structure which comprises a first pool wall brick, a second pool wall brick, a pool bottom brick, a first pool wall cushion brick and a second pool wall cushion brick. The pool bottom brick is laid at the bottom of the melting pool, the second pool wall brick is located above the pool bottom brick, the first pool wall cushion brick and the second pool wall cushion brick are located between the pool bottom brick and the second pool wall brick, a gap is formed between the first pool wall cushion brick and the second pool wall cushion brick, the first pool wall brick is located above the second pool wall brick, and the projection of the first pool wall brick in the vertical direction is larger than the projection of the second pool wall brick in the vertical direction. And close to one side of the melting tank, the first tank wall brick protrudes out of the second tank wall brick. According to the technical scheme, the problem that the service life of a glass kiln is shortened due to the fact that the thickness of the pool wall brick located at the three-intersection interface after erosion is too small in the prior art is effectively solved.

The application discloses a kind of safety automatic control flow's casting equipment, including melt pool, aluminium water inlet pool and pump chamber, melt pool is connected to aluminium water inlet pool by aluminium water channel in furnace, pump chamber is connected with aluminium water inlet pool by bottom inlet channel, impeller is provided in pump chamber, aluminium water outlet channel is connected with aluminium water steady flow pool above pump chamber, aluminium water steady flow pool bottom is provided with steady flow pool flow eye, steady flow pool flow eye is connected with outlet flow groove, steady flow pool flow eye outer end is provided by the plug head for plugging steady flow pool flow eye;Method, S1: melt raw material in melt pool, obtain aluminium water;S2: aluminium water flows into to pump chamber, then flows into to aluminium water steady flow pool;S3: aluminium water in aluminium water steady flow pool, flow into to outlet flow groove;S4: aluminium water in outlet flow groove flows into to corresponding aluminium piece casting tray, corresponding need to be manufactured aluminium piece can be obtained;Effect: method structure is novel, steady flow pool flow eye and melt pool are not directly communicated, increase insurance for aluminium casting safety, guarantee safety.

A method for preparing a magnesium alloy tissue engineering scaffold with a smooth inner surface by laser powder bed fusion (LPBF) is provided. The method includes: step S1: scanning a porous scaffold, and selecting the densest filling scan parameters, where the scanning includes a single-pass contour scan and a single-pass filling scan; step S2: optimizing a contour scan strategy according to the densest filling scan parameters; step S3: acquiring a corresponding melt pool dimension, and adjusting a spot compensation value based on the optimized contour scan strategy; and step S4: preparing a magnesium alloy tissue engineering scaffold based on the contour scan strategy and the adjusted spot compensation value. The method eliminates powder adhesion and sagging defects inside the complex porous structure that severely affect inner surface roughness and scaffold performance, thereby the pore connection, fatigue and corrosion resistance will be improved greatly.

The application discloses an aluminum-based 3D printing melt pool behavior intelligent analysis method based on image recognition and relates to the technical field of additive manufacturing process monitoring. The method comprises the following steps: acquiring a time sequence image sequence of a melt pool region in an aluminum-based 3D printing process, performing a pixel-level gray gradient direction coding operation on the time sequence image sequence, and generating a melt pool boundary flow direction feature map; based on the melt pool boundary flow direction feature map, extracting a geometric deformation parameter of a melt pool contour, and mapping the geometric deformation parameter to a printing coordinate space to generate melt pool deformation field distribution data; according to the melt pool deformation field distribution data, tracking displacement vectors of melt pool boundary points between adjacent frames, and calculating a melt pool surface oscillation frequency through the displacement vectors to obtain melt pool oscillation characteristic quantities; and performing phase matching on the melt pool oscillation characteristic quantities and preset melt pool stability criteria to output a melt pool behavior state marker.

The invention belongs to the technical field of liquid metal 3D printing, and particularly relates to a jet flow control system for melt impact, which comprises an upper cavity device, a vacuumizing system, a gas supply system, a pressure monitoring device, a main controller and an upper computer, an upper cavity pressure gauge is mounted at the upper part of the upper cavity device and is used for monitoring the gas pressure in the upper cavity device in real time; a nozzle is arranged on the lower portion of the upper cavity device, the gas supply system is communicated with the upper cavity device, the vacuumizing system is communicated with the upper cavity device, and the upper computer, the upper cavity pressure gauge, the gas supply system and the vacuumizing system are all in communication connection with the main controller. The upper computer is used for inputting an operation instruction to the main controller, so that the main controller controls the gas supply system and the vacuumizing system based on the operation instruction and the gas pressure; through non-mechanical on-off control of gas pressure, rapid opening and closing of jet flow are achieved, it is guaranteed that the solidification and forming process of a molten pool is controllable, and a series of problems caused by a mechanical switch are avoided.

Embodiments of the present application disclose a 3D printing deformation visualization model construction method, device, medium and equipment, and relate to the technical field of additive manufacturing. The method comprises: obtaining a deformation amount of each single layer according to a melt pool size of a single layer slice of a target part in a 3D printing process; adding the deformation amount of each single layer to a slice track model to obtain a plurality of deformation slice layers; and reconstructing the plurality of deformation slice layers to obtain a three-dimensional deformation model of the target part. The melt pool width of the part in the 3D printing process is mapped to the deformation amount of the part, and the deformation is decomposed to the three-axis direction of each slice layer according to the printing characteristics. By obtaining the real-time melt pool width change in printing, the change can be converted into the deformation of the part and added to the slice track model. Since the deformation is decomposed to each slice layer, the slice layer to which the deformation information is added needs to be reconstructed finally, and the visualization three-dimensional model of the deformed part can be obtained, so that the overall deformation of the part is displayed, and the prediction and control of the deformation amount in 3D printing can be further improved.

This invention discloses a method for fine-grained billet preparation with low extrusion ratio and synergistic annealing of difficult-to-deform high-γ′ phase superalloys, comprising the following steps: raw material purification and batching preparation – vacuum induction melting – electron beam melting pretreatment – ​​initial molten pool establishment and stabilization melting – homogenization treatment – ​​hot extrusion and annealing heat treatment. The method utilizes electron beam droplet melting directional solidification technology to prepare difficult-to-deform superalloy ingots with continuous columnar crystal structure. Taking advantage of the significantly superior dislocation storage capacity of columnar crystals compared to traditional equiaxed crystals, and combining low extrusion ratio billet preparation with subsequent precision recrystallization annealing, this method effectively avoids the problems of easy cracking, uneven microstructure, and high cost in high extrusion ratio dynamic recrystallization processes, breaking the stringent limitations of traditional processes on the lower limit of the extrusion ratio. Compared with traditional high extrusion ratio billet preparation processes, the material yield is increased from 60%–75% to 80%–90%, an increase of 15%–25%, significantly reducing the extrusion cracking scrap rate and improving the overall microstructure consistency of the bars.

Method for depositing materials in a substrate (12), comprising: arranging a first section of a substrate in a vertically downward direction; directing an energy beam (16) from below the first section upwards towards the first section; forming a melt pool (26) in the substrate (12) using the directed energy beam (16), wherein the melt pool (26) is formed such that it is directed vertically downwards in the first section;and directing a particle stream (20) from below the first section upwards towards the first section, wherein at least some of the particles (20A) are configured to rise in the melt pool (26) towards the substrate (12), wherein the particles (20) are made of a different material than the substrate (12), and wherein the method further comprises: solidifying the melt pool (26) after the desired quantity of particles (20) has been dispersed in the melt pool (26) and the desired particles (20A) have risen in the melt pool (26) towards the substrate (12), and forming a coating on the substrate (12) which is a metal matrix composite coating with a desired degree of porosity near the unmelted sections of the substrate (12).

The invention discloses a laser powder feeding additive manufacturing device and method for an Nb-Si intermetallic compound composite material, and relates to the technical field of high-temperature structural material additive manufacturing. The method solves the problems that according to an existing method for preparing the Nb-Si intermetallic compound composite material through the laser directional energy deposition technology, due to the fact that the local temperature gradient is huge and thermal stress is too high, a formed part is prone to cracking, deformation and composition segregation, and a complete and compact component cannot be obtained. In an inert gas protection environment, dynamic preheating and post-heating heat preservation are carried out on the front area and the rear area of a laser molten pool through combination of overall preheating of a substrate and a local auxiliary heating device synchronously moving with a laser deposition head, and the temperature gradient of a deposition area is strictly controlled to be below a safety threshold value through infrared temperature measurement closed-loop control; and finally, stress release is completed through programmed slow cooling. The method is used for crack-free and high-quality near-net forming manufacturing of Nb-Si-based intermetallic compound composite material components for high-temperature structures in the aerospace field.

An additive manufacturing system includes a laser array including a plurality of laser devices. Each of the plurality of laser devices generates an energy beam for forming a melt tank in the powder bed. The additive manufacturing system further includes at least one optical element. The optical element receives at least one of the energy beams and causes a predetermined power diffusion in the at least one energy beam.

The utility model discloses an auxiliary device for testing the density of an asphalt core sample, which comprises a wax melting pool used for melting a solid wax block to form a wax liquid and maintaining the wax liquid in a molten state; the at least one clamp is positioned in the wax melting pool and is used for grabbing an asphalt core sample; the control arm is rotationally mounted on the side wall of the wax melting pool, one end of the control arm penetrates through the side wall of the wax melting pool and extends into the wax melting pool to be connected with the clamp, the control arm is provided with a control mechanism, and the control mechanism is used for controlling the clamp to clamp the asphalt core sample. The fixture is arranged in the wax melting pool, the fixture is controlled through the control arm and the control mechanism, wax liquid coating of an asphalt core sample can be rapidly completed by rotating the control arm, and wrist injury of a tester can be effectively avoided.

Provided herein are apparatuses, systems, and methods of part-agnostic melt pool vibration in wire fusion manufacturing, which finds particular application in connection with additive manufacturing methods using wires formed from metal and / or a filler material. In embodiments, a directed energy deposition of wire materials is provided in conjunctions with a wire delivery system that imparts vibrations to the wire material, where such vibrations are at least in part transferred to the melt pool formed at a focal spot of the directed energy system.

A method for determining alloy processing parameters is provided. Simulated melt pool temperature and melt pool geometries can be used to create an initial printability map based on laser speed and laser power, and the printability map can include regions with potential manufacturing defects. Single-track experiments can be used to calibrate the printability map, to produce a revised printability map. Finally, contour lines representing hatch spacing can also be added to the revised printability map to produce a final printability map that can be used to configure additive manufacturing machinery.

The application discloses an extrusion forming device for aluminum alloy profile preparation, which comprises a sliding outer cylinder, a feeding pipe is communicated with the bottom of the side surface of the sliding outer cylinder, a fixed screw sleeve is fixedly connected with the side surface of the sliding outer cylinder, a moving ring is fixedly connected with the inner wall side surface of the sliding outer cylinder at a position above the feeding pipe, a connecting frame is fixedly connected with the bottom of the moving ring, an extrusion base is fixedly connected with the bottom of the connecting frame, a straightening pipe is fixedly connected with the top of the extrusion base, the extrusion base is arranged in the inside of a melting pool and is slidably connected with the inner wall side surface of the melting pool, and the sliding outer cylinder is threadedly connected with the top of a driving assembly through the fixed screw sleeve. Before extrusion forming is carried out, the raw material is firstly introduced, the equipment base supports and fixes the melting pool and the driving assembly, the extrusion forming device is preset at a position above the melting pool, and the raw material enters the inside of the melting pool to be melted.

A method of manufacturing a 3D object, the method comprising: providing a powder layer of powder particles; building up a new layer of the 3D object by directing a beam of radiation towards the powder layer to melt the powder particles at predetermined positions to build up the new layer of the 3D object on re-solidification; and forming a pore in the new layer at a preselected position by using a beam of radiation to form and subsequently collapse a melt pool so as to trap gas as a pore in or below the new layer at the preselected position on re-solidification.

The utility model relates to the technical field of fly ash treatment equipment, and discloses a fly ash melting treatment device which comprises a feeding section and a melting section, the feeding section comprises a stock bin, a first feeding channel, a second feeding channel and a pusher, the first feeding channel is vertically arranged, the second feeding channel is inclined, the first feeding channel is connected with a discharge port of the stock bin and the second feeding channel, the second feeding channel is provided with a first end and a second end lower than the first end, and the pusher is arranged at the first end in the second feeding channel; the melting section comprises a third feeding channel, a molten pool and a combustor, a fly ash feeding opening is formed in the position, close to the bottom, of the molten pool, and the second end is connected with the fly ash feeding opening through the third feeding channel; combustors are installed on the two opposite side walls of the molten pool, the molten pool is provided with a smoke outlet and a liquid fly ash overflow opening, and when the combustors work, the temperature of the area, close to the top wall, in the molten pool ranges from 1400 DEG C to 1500 DEG C. The fly ash treatment device is suitable for treating fly ash with the flowing temperature below 1350 DEG C, and energy consumption and equipment cost can be reduced.

The present invention discloses a method for dynamic melt pool size detection and forming direction discrimination, comprising: collecting dynamic melt pool images, performing image segmentation, and generating a dynamic melt pool image source data set; generating a dynamic melt pool image data set; constructing a melt pool size detection convolutional neural network with a direction discrimination function, improving the loss function, adding a melt pool forming direction loss, and performing sufficient training to obtain a melt pool size detection convolutional neural network with a direction discrimination function; collecting real-time dynamic melt pool images, and using the trained melt pool size detection convolutional neural network to perform size detection and forming direction discrimination on the real-time dynamic melt pool images, thereby obtaining the length, width, and forming direction information of the melt pool morphology. The present invention designs a melt pool size detection convolutional neural network with direction discrimination, which improves the detection method of traditional target recognition neural networks and has the characteristics of fast processing speed, high recognition accuracy, and simple and fast detection method.

A schlieren system for in-situ / online monitoring of spatter in a large-area melt pool is provided, including a parallel light generation part, a parallel light deflection part, and an image acquisition part. The system can monitor spatter and other physical phenomena in the melt pool in a process of multi-layer printing and adjust a monitored area during an experiment to expand a monitored range. A reflector group composed of a plurality of plane mirrors is arranged, such that an optical path can be kept away from powder and dust areas, avoiding interference between the schlieren system and inherent devices inside a build chamber. Communication between a laser path controller and an optical path deflecting mirror galvanometer motor controller is established to automatically control the plane mirrors to change the monitored area, automatically track the melt pool, and realize online monitoring.

The present invention provides a method and system for in-situ monitoring of the molten pool temperature field based on multi-eye light field imaging. The present invention adopts a multi-eye light field camera system and obtains the temperature field of the molten pool by establishing a light field sub-aperture Bayer model. R 、 G 、 B The melt pool images of three channels are used to calibrate the relative spectral response of the light field camera and the ratio of the dual wavelength intensity in the coaxial temperature measurement system. R 、 G 、 B The melt pool temperature field was derived using dual-wavelength thermometry, combining two of the three channels' melt pool images with calibration parameters. A multi-wavelength field temperature measurement system was calibrated using a blackbody furnace, maintaining a monitored temperature field error below 3%. This method simplifies the monitoring process, improves temperature measurement accuracy, and boasts a wide temperature range and low complexity, enabling in-situ monitoring of high-temperature metal melt pools. It holds broad application prospects in additive manufacturing.

Computer-implemented systems and methods are described herein for determining additive manufacturing parameters in a simulation. Input data regarding a product to be generated via additive manufacturing and a beam diameter are received. Based on the input data, a characteristic dimension is determined. The beam diameter is normalized based on the characteristic dimension. Additive manufacturing parameters, such as penetration depth and absorptivity, are determined based on the normalized beam diameter and experimentally-determined trends. The manufacturing of the product is then simulated according to the additive manufacturing parameters.

The invention provides an additive manufacturing high-temperature alloy printing piece and a preparation method thereof, and relates to the technical field of additive manufacturing, and the preparation method comprises the following steps: performing selective laser melting forming treatment on high-temperature alloy powder to obtain a deposition-state additive manufacturing high-temperature alloy printing piece with a layered crystal structure; wherein in the step of selective laser melting forming treatment, by controlling technological parameters, the lap joint rate of a molten pool is made to be 30%-60%, and the ratio of the height to the width of the molten pool is 0.7-1.4; the layered crystal structure is lt; 001gt, 001gt; an orientation zone and lt; 110gt, 110gt; the orientation areas are alternately arranged in the direction perpendicular to the laser scanning direction and are of a layered structure continuously extending in the laser scanning direction. The result is determined through the lap joint rate of the molten pool; 110gt, 110gt; forming an orientation area, lt; 110gt, 110gt; and an orientation area has a higher Taylor factor, so that larger shear stress is generated in the deformation process, deformation twin crystals can be activated, and the plasticity of an additive manufacturing high-temperature alloy printing piece can be improved.

Methods of additively manufacturing a manufactured component and systems that perform the methods. The methods include determining an energy application parameter at an addition location on a previously formed portion of the manufactured component. The energy application parameter includes an intersection area relationship that describes an area of intersection between the previously formed portion and a surface of a virtual geometric shape, which is positioned at the addition location, as a function of a size parameter of the virtual geometric shape. The methods also include supplying a feedstock material to the addition location. The methods further include delivering an amount of energy sufficient to form a melt pool of the feedstock material at the addition location. The amount of energy is based, at least in part, on the energy application parameter. The methods also include consolidating the melt pool with a previously formed portion of the manufactured component.

The invention discloses a monitoring method and device for a metal additive manufacturing molten pool, a terminal, a storage medium and a computer program product, and the method comprises the steps: carrying out the training of a dual-network model composed of improved YOLOv7 and improved U-net based on the historical image data of the metal additive manufacturing molten pool, and obtaining a needed image monitoring model; based on the current image data of the metal additive manufacturing molten pool, current monitoring data of the metal additive manufacturing molten pool are obtained through the image monitoring model; and according to the current monitoring data of the metal additive manufacturing molten pool, control parameters of the metal additive manufacturing molten pool are adjusted, so that the forming quality of a metal structural part of the metal additive manufacturing molten pool is improved. According to the scheme, the dual-network model composed of the YOLOv7 and the U-net is adopted to conduct cooperative processing on the image data of the molten pool to obtain the monitoring data of the molten pool, accurate control over the molten pool is achieved, and implementation of the high-quality forming target of the metal additive manufacturing process is improved.