537results about "Manufacturing data aquisition/processing" patented technology

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

The present application relates to the technical field of 3D printer calibration, and specifically provides a multi-color FDM printing real-time visual pose correction method and a 3D printer.The pose correction method comprises the following steps: obtaining an image of a printing layer based on a camera above a printing platform; obtaining image information at a nozzle based on a camera of a printing head; extracting physical space coordinates of reference feature points based on the collected image; solving pose parameters by an improved PnP algorithm based on the physical parameter coordinates of the reference feature points; and adjusting printing parameters based on the pose solving result and real-time monitoring data.The present application uses the color boundary of the printing material itself as a natural visual reference, effectively avoiding the cumbersome operation of manually pasting physical markers and the risk of marker failure caused by high temperature.

A seal assembly for an industrial transmission includes a vertically aligned lower power shaft to exchange torque with the industrial transmission, and a transmission component arranged radially outside the power shaft. The power shaft has a greater rotational speed than the transmission component during operation. A contactless first seal between the transmission component and the power shaft includes a conical first sealing gap, which is beveled in a direction of gravity and runs from radially outside to radially inside counter to the direction of gravity. A first overflow channel runs downward to at least a large extent in the direction of gravity and communicates with the first sealing gap. The first overflow channel ends below the first sealing gap in the direction of gravity and is embodied as an annular gap with a substantially constant flow cross section such as to avoid formation of a labyrinth seal.

1. Method, in particular a computer-implemented method, for generating training data to determine potentially occurring deformations on a green part (5) which may occur during a post-treatment (6) of the green part (5) following an additive manufacturing process with which the green part (5) can be produced,comprising the following steps: - Providing model data for at least one green part (5) to be produced; - Providing at least one property of the green part (5) to be produced; - Segmenting the green part (5) to be produced into several segments (8) based on the provided model data; - Performing a simulation for each segment of the several segments (8) of the green part (5) to be produced concerning the post-treatment (6) of the green part (5) to be produced based on the at least one provided property of the green part (5); - Determining at least one process property for each segment of the several segments (8) based on the simulation performed, wherein the at least one process property of each segment is used to characterize,which influence the respective segment has on at least one adjacent segment (10) of the multiple segments (8) during the post-treatment (6); and- generating the training data based on the multiple segments (8) and the at least one process property determined for a respective segment of the multiple segments (8), wherein- a post-treatment cycle relating to the post-treatment (6), a green part density of green parts during the post-treatment (6), and / or an arrangement and / or an orientation of the green part (5) to be generated during the post-treatment (6) is provided, wherein the post-treatment cycle relating to the post-treatment (6), the green part density of green parts during the post-treatment (6), and / or the arrangement and / or the orientation of the green part (5) to be generated during the post-treatment (6) is taken into account when performing the simulation for a respective segment of the multiple segments (8),and / or- a geometry of a respective segment, a volume of a respective segment, a geometric configuration of a respective segment and / or a boundary condition concerning a respective segment is taken into account when performing the simulation for a respective segment of the several segments (8), and- on the basis of the simulation performed for a respective segment of the several segments (8), a force exerted by the respective segment on at least one neighboring segment (10), which can be brought about on the basis of the post-treatment (6), is determined, wherein a state of the segment (10) that is at least one neighboring segment to the respective segment can be changed on the basis of the exerted force.

Disclosed herein are systems and methods for the stabilization of additive manufactured or 3D printed parts. The stabilization system may comprise a frame with one or more stabilization mechanisms coupled to the frame. The stabilization mechanisms may be actuated via a motor or a clamping mechanism, and the clamping mechanism may be a four-bar linkage mechanism. Various stepper motors may be provided to actuate the movement of the print head and stabilization mechanisms. The stabilization system reduces print time and is reusable, providing advantages over conventional systems.

Systems and methods are provided for improving existing 3D FDM printing technologies. A 3D printing process and a 3D printer are also provided. The 3D printer provides stronger adhesion between the layers of printed parts than current printers. This enhancement increases the tensile strength of 3D printed components in the direction perpendicular to the layers.

The invention relates to a method for producing an ophthalmological device (20), having the steps of: providing at least one container (1) which is transparent to electromagnetic radiation (31), and for each of at least two sub-regions (10-x) of the ophthalmological device (20): providing a liquid (2-x), which can be cured using electromagnetic radiation (31), in the at least one container (1); generating and / or providing a data set (33) of images of each sub-region (10-x) of the ophthalmological device (20), said images containing projections of the sub-region (10-x) from different directions; and - tomographically printing the curable liquid (2-x) using electromagnetic radiation (31) on the basis of the generated and / or provided data set (33) in order to produce the sub-region (10-x). The step of providing the curable liquid (2-x) and / or tomographically printing the curable liquid is carried out such that at least two of the at least two sub-regions (10-x) differ in terms of at least one property, wherein at least during the first printing process, a support structure is printed in addition to the sub-region (10x), said support structure holding in place the sub-region (10-x) and / or the ophthalmological device (20) produced until now. The invention additionally relates to an assembly (30) for producing an ophthalmological device (20).

The disclosure provides a method for additively manufacturing an ophthalmic device delimited by a targeted curved geometrical envelope, thanks to at least one inkjet print head having at least one nozzle, the method comprising inkjet printing a first layer, the first layer being divided into several first sub-layers, and inkjet printing a second layer above the first layer, the second layer being divided into several second sub-layers, wherein a first one of the first sub-layers is disposed and others of the first sub-layers are disposed on and after the first one of the first sub-layers and are each offset from the first sub-layer immediately below by a first determined shifting distance in a first direction inside the targeted curved geometrical envelope, and wherein a first one of the second sub-layers is disposed on the first layer and is offset from the first one of the first sub-layers by a second determined shifting distance lower than the first determined shifting distance and in the first direction inside the targeted curved geometrical envelope; whereby the first one of the second sub-layers at least partially covers at least one of the others of the first sub-layers.

Additive manufacturing methods, additive manufacturing systems (100), support material for additive manufacturing, and products thereof are provided. For example, the additive manufacturing methods includes depositing a structure material into a support material (108) based on a first computer model of an object, thereby forming a first portion of the object in the support material. The structure material exhibits a viscosity in a range of 1 mPa*s to 5000 mPa*s (1 cP to 5,000 cP) at 25 degrees Celsius. The support material exhibits a density in a range of 1.05 g / mL to 3 g / mL. The method includes repeating the depositing of the structure material as necessary to additively form the object.

The utility model discloses a kind of granule 3D printer printing head with vibration auxiliary, including vibrating hopper, barrel, spiral feeding device, heating ring, nozzle and vibration device, control system, 3D printer main control system connection and temperature control system, vibration device is set on vibrating hopper or spiral feeding device, high-frequency vibration can be generated, promote the flow of granule using vibration energy, prevent granule from happening jam, the top of vibrating hopper is relatively connected with feed pipe;The utility model can effectively prevent granule from happening jam in the process of feeding by setting vibration device in printing head, ensure the continuity and stability of feeding. High-frequency vibration generated by vibration device can promote the flow of granule, avoid the problem of inadmissible feeding or even broken material caused by mutual adhesion between granules, thereby improve the reliability of 3D printing process, reduce the number of printing process interruption, and then improve printing quality and efficiency.

This invention relates to the technical field of photopolymer additive manufacturing, and specifically to a control system and method for continuous photopolymerization of multi-material composites. The system includes a control unit, a projection unit, and a composite molding execution unit. Since the composite molding execution unit is positioned above the projection unit, the Z-axis lifting module is perpendicular to the projection unit, and the X-axis translation module is connected to the Z-axis lifting module. This achieves physical isolation between the dual independent optomechanics and the material tank, continuous molding of functionally graded materials through dynamic parameters and multi-mode scheduling, and cross-tank collaborative control and interface strengthening treatment. The control method for continuous photopolymerization of multi-material composites of this invention, by achieving continuous printing of two materials through time-driven cross-tank collaborative control, improves the interfacial bonding strength of heterogeneous materials and increases printing speed, thereby solving the problems of poor multi-material compatibility, low switching efficiency, and low interfacial bonding strength.

Additive manufacturing system (1600), comprising: a device (1670) designed to distribute a layer of metallic powder (1635) on a build plane (1630); an energy source (1605) designed to emit an energy beam (1610) onto the building plane (1630) and to fuse the metallic powder (1635) into a region of a part; and a processor (1680) configured to do: to control the energy beam (1610) across the building plane (1630); to obtain data generated by one or more sensors (1650, 1665) that detect electromagnetic energy (1640) emitted from the build plane (1630) when the energy beam (1610) melts the metallic powder (1635); to convert the obtained data into one or more parameters that specify one or more states at the construction plane (1630) while the energy beam (1610) melts the metallic powder (1635); at least partially based on the geometry of the part, to select a machine learning algorithm; to use one or more parameters as input into the machine learning algorithm in order to generate an output from the machine learning algorithm; and to use the output of the algorithm to detect one or more defects in the fused metal powder.

The application aims to provide a stress-based 3D printing continuity path planning method. The application obtains a to-be-printed model, discretizes the to-be-printed model into a hexahedral grid, the side length of the grid is twice the printing path width, and the height is the pre-printed layer thickness, and the principal stress field is obtained by using finite element analysis. Since the path is generated on a two-dimensional quadrilateral grid, the principal stress direction field is projected onto the two-dimensional domain. For the stress value of the unit close to zero, the stress direction is arbitrary, a method of uniform principal stress direction field is proposed, the stress line is extracted from the principal stress direction field, a plurality of connection rules are adopted, the isolated points are eliminated, and the continuity is optimized. Finally, each stress line is offset to generate a path with a closed loop, and different paths are connected to generate a globally continuous path. In addition, the extrusion rate is adjusted adaptively according to the path direction to alleviate the overfilling problem caused by grid discretization. The model printed by the method has strong mechanical properties under the premise of guaranteeing the surface quality and the curved surface accuracy.

The present application relates to a kind of multi-material large-size volume 3D printing system and printing method, including substrate;Forming cavity;Rotary table;Projection module, and quantity is two, two projection systems are projected on same forming cavity;Monitoring module, its quantity is two, real-time printing information is transmitted to control module and is analyzed, carries out real-time light dose correction;Motion module, it is used to control the synchronous movement of the projection module and monitoring module of same group, the present application utilizes DMD splicing technology to enlarge the projection area of projection system, further enlarge the projection area in conjunction with the projection orientation cooperation between double projection systems, improve the printable size of volume 3D printing technology, and can flexibly replace projection module light source, suitable for the synchronous solidification of photosensitive resin based on multiple solidification principles, greatly improve the manufacturing efficiency and printing size of multi-material volume 3D printing.

The application discloses an anti-deformation crown-shaped cage of a super-speed motor bearing and a manufacturing method, and belongs to the technical field of motor bearings. The anti-deformation crown-shaped cage of the super-speed motor bearing is printed by a functionally graded material, the functionally graded material comprises hard-phase material and soft-phase material, the hard-phase material is glass fiber, and the soft-phase material is nylon 66; the equivalent elastic modulus of the functionally graded material continuously and gradually changes along the axial direction from the bottom of the pocket hole to the end of the locking claw, so that the elastic modulus of the bottom area of the pocket hole is higher than that of the end area of the locking claw, and the ovalization deformation of the pocket hole and the centrifugal deformation of the locking claw are cooperatively inhibited; the functionally graded material is introduced to actively reconstruct the stiffness field of the crown-shaped cage; the toughness phase is constructed in the locking claw area to absorb collision energy, the reinforced phase is formed in the pocket hole area to weaken stress concentration, and the stiffness gradient is established at the connecting position to inhibit the umbrella effect; and the application provides the crown-shaped cage with the characteristics of high toughness, gradient and high strength and a design method thereof.

A method of determining an irradiation sequence for a powder bed fusion process, wherein each scanner of a plurality of scanners is operated to steer a corresponding energy beam across the powder bed (104) such that a plurality of the energy beams (118a, 118b, 118c, 118d) irradiate the powder bed (104) when a recoater (109) is above the powder bed (104), and powder layers (104a, 104b) are formed with the recoater (109) such that a movement of the recoater (109) on a powder layer forming stroke differs for different ones of the powder layers (104a, 104b). The method comprises determining an irradiation sequence for a powder layer 9104a, 104b) by allocating each scanner to irradiation regions (1a, 2a, 3a, 4a,1b, 2b, 3b, 4b) taking into account the movement of the recoater (109) on the powder layer forming stroke differing for different ones of the powder layers (104a) such that irradiation of each irradiation region (1a, 2a, 3a, 4a, 1b, 2b, 3b, 4b) is completed before the irradiation region (1a, 2a, 3a, 4a, 1b, 2b, 3b, 4b) is covered during formation of the next powder layer (104b).

The present disclosure relates to additive manufacturing methods and systems that detect and extract impurities and produce compositions. An additive manufacturing system that extracts impurities in an additive manufacturing material, the system including an additive manufacturing machine that manufactures a part using the additive manufacturing material. The system can additionally include a conductive plate adjacent to the additive manufacturing material. The system can also include an energy source that distributes an electric charge through the conductive plate adjacent to the additive manufacturing material. Distributing the electric charge through the conductive plate can attract the impurities from the additive manufacturing material to the conductive plate.

Filament resistance detection device for a 3D printer (200), comprising: an extrusion assembly (202) provided with an extrusion mechanism (110), wherein the extrusion mechanism (110) is configured to drive a filament to be fed to the hotend (900);a feed assembly (203) which is provided with a feed channel (210), wherein a feed inlet of the feed channel (210) is configured to receive a filament from a feed device (100), the filament is fed from the feed device (100) from a feed opening (700) of the feed device (100) into the feed inlet of the feed channel (210), a filament tube (600) is provided between the feed opening (700) of the feed device (100) and the feed inlet of the feed channel (210), such that the length of a part of the filament between the feed opening (700) of the feed device (100) and the feed inlet of the feed channel (210) corresponds to the length of the filament tube (600);an elastic element (300), wherein one end of the elastic element (300) is connected to the extrusion assembly (202) and the other end is connected to the feed assembly (203), the elastic element (300) being configured to prevent the extrusion assembly (202) from approaching the feed assembly (203) in the direction of the filament in the feed channel (210), thus shortening the relative distance between the feed assembly (203) and the extrusion assembly (202); a trigger element (400) being arranged at one end of the extrusion assembly (202) and the feed assembly (203); a detection element (500) being arranged at the other end of the extrusion assembly (202) and the feed assembly (203) and being configured to shorten the relative distance between the extrusion assembly (202) and the Feed assembly (203) or a change in the relative distance is detected by detecting a relative distance to the trigger element (400).

To provide a method for making 3D components having graded material properties.SOLUTION: There are provided method and system of using a roller-based deposition process to place two or more powders at some level of precision to build a multi-material, functionally-graded component. Instead of formulating a liquid ink by dispersing powder feed stocks (metal or ceramic) in some binder-solvent mixtures, there is detailed the use of two different types of fluid deposited in a digital form on a roller surface. The two different types of fluids generate a "wetted pixel" that subsequently can capture a specific powder type with an affinity only to that fluid. Alternatives such as electrostatics, electrophotography, and the like are also provided to be used exclusively or with fluids to create an affine pixel to a particular powder type.SELECTED DRAWING: Figure 2

The present invention relates to a device, for the sterile 3D printing of a contact lens, comprising: (a) at least 0.2 ml of photopolymer resin, which solidifies upon transmission from a light source; (b) a receptacle, for containing said photopolymer resin, having a transparent bottom, for allowing an external light source to transmit light into said device for selectively solidifying part of the photopolymer resin into a solidified polymer layer of said contact lens; (c) a detachable top, for covering said receptacle, with an aperture for allowing the flow of fluids into and out of said device; (d) an elevatable platform, located inside said device, serving as a build plate for the solidified layer(s) of said contact lens and (e) a conduit, attached to said platform and accessible from without said device, for allowing the flow of fluids into and out of said device.

Provided is a three-dimensional additive manufacturing device that makes it possible to easily ascertain the melt state of an entire fabricated surface. Specifically provided is a three-dimensional additive manufacturing device that uses a manufacturing beam to perform additive manufacturing in a vacuum, said device comprising: a thermoelectron detection unit that detects the amount of thermoelectrons emitted from a fabricated surface irradiated with the manufacturing beam; a storage unit that stores the positions at which the fabricated surface is irradiated with the manufacturing beam in association with the amounts of thermoelectrons detected by the thermoelectron detection unit at the times of irradiation with the manufacturing beam, and a display control unit for displaying a thermoelectron distribution image obtained by superimposing an image expressing the amounts of thermoelectrons, said image being stored at the storage unit, on an image of the fabricated surface.

The present application provides a projection type light curing 3D printing system, which sets up a light source array and a collimating lens group to construct multiple groups of deflection angle different quasi parallel light as the incident light of a DMD chip, can simultaneously construct macro resolution and sub-resolution structure, ensures to have higher printing precision while having larger printing area, effectively improves the efficiency of high resolution structure manufacturing; can also adjust the sub-resolution structure size under the condition that other conditions are certain, improves the printing precision under the same printing area. Meanwhile, the printing system of the present application enables the lower precision optical machine to have high precision printing effect to a certain extent, effectively reduces the equipment cost. In addition, the printing system of the present application can adapt to the printing of various materials, including light curing resin, photosensitive resin or light curing hydrogel, etc., has a relatively broad application prospect.

The application provides a method for realizing color continuous gradient transition by using DLP light curing 3D printing, and belongs to the technical field of additive manufacturing. The steps comprise: providing a dual-wavelength DLP light curing printing device, adjusting a printing focal plane, segmenting and slicing a three-dimensional digital model, setting dual-wavelength exposure parameters, preparing a photosensitive resin slurry containing components such as pH responsive dyes and photoacid generators, completing layer-by-layer printing through reciprocating dynamic switching of visible light curing forming and ultraviolet light color regulation, and obtaining a target workpiece after post-processing. The method realizes high-resolution, continuous gradient integrated forming of multi-color materials through single-light-machine dual-wavelength (365nm ultraviolet light and 460nm visible light) ultra-high-speed dynamic switching combined with a specific formula of photosensitive resin slurry.