To provide a three-dimensional printing device that irradiates approximately the same ranges on the surface of a powder layer simultaneously with a plurality of electron beams having different beam shapes. An electron beam column 200 of the three-dimensional printing device 100 includes a plurality of electron sources 20 including electron sources having anisotropically-shaped beam generating units, and beam shape deforming elements 30 that deform the beam shapes of electron beams output from the electron sources 20 on a surface 63 of a powder layer 62. A deflector 50 included in the electron beam column 200 deflects an electron beam output from each of the plurality of electron sources 20 by a distance larger than the beam space between electron beams before passing through the deflector 50.

A method and an apparatus pertaining to recycling and reuse of unwanted light in additive manufacturing can multiplex multiple beams of light including at least one or more beams of light from one or more light sources. The multiple beams of light may be reshaped and blended to provide a first beam of light. A spatial polarization pattern may be applied on the first beam of light to provide a second beam of light. Polarization states of the second beam of light may be split to reflect a third beam of light, which may be reshaped into a fourth beam of light. The fourth beam of light may be introduced as one of the multiple beams of light to result in a fifth beam of light.

An optical manufacturing process sensing and status indication system is taught that is able to utilize optical emissions from a manufacturing process to infer the state of the process. In one case, it is able to use these optical emissions to distinguish thermal phenomena on two timescales and to perform feature extraction and classification so that nominal process conditions may be uniquely distinguished from off-nominal process conditions at a given instant in time or over a sequential series of instants in time occurring over the duration of the manufacturing process. In other case, it is able to utilize these optical emissions to derive corresponding spectra and identify features within those spectra so that nominal process conditions may be uniquely distinguished from off-nominal process conditions at a given instant in time or over a sequential series of instants in time occurring over the duration of the manufacturing process.

An automated welding apparatus and computer-implemented method are described which generally perform the steps of: scanning a joint interface of a workpiece using a three-dimensional scanner (S4); determining a volume to be filled by a welding process (S6); determining a specification for the welding process based on the volume to be filled using an algorithm (S8, S10); and controlling a welding device so as to execute the specification by moving the welding device relative to the workpiece (S12).

This invention relates to a method and arrangement for manufacturing objects by solid freeform fabrication, especially titanium and titanium alloy objects, wherein the deposition rate is increased by supplying the metallic feed material in the form of a wire and employing two gas transferred arcs, one plasma transferred arc for heating the deposition area on the base material and one plasma transferred arc for heating and melting the feed wire.

The invention relates to the thermal creation of a part, including steps of: using at least one first and one second metal plate (30, 31), hollow-forming the first plate so as to form at least part of said inner wall, and hollow-forming the second plate (31) so as to form at least part of said outer wall. During the forming, the shapes of the first and second plates are adjusted such that they can be placed in contact with each other while leaving a space therebetween inside said periphery, and then the first and second plates are placed in a low-pressure and/or controlled-atmosphere chamber (65), where said plates are brought together and peripherally sealed together such that, in said space, a low-pressure and/or controlled-atmosphere enclosure is created.

A computing device for controlling the operation of an additive manufacturing machine comprises a memory element and a processing element. The memory element is configured to store a three-dimensional model of a part to be manufactured, wherein the three-dimensional model defines a plurality of cross sections of the part. The processing element is in communication with the memory element. The processing element is configured to receive the three-dimensional model, determine a plurality of paths, each path including a plurality of parallel lines, determine a radiation beam power for each line, such that the radiation beam power varies non-linearly according to a length of the line, and determine a radiation beam scan speed for each line, such that the radiation beam scan speed is a function of a temperature of a material used to manufacture the part, the length of the line, and the radiation beam power for the line.

A leveling slider exchange arrangement for use in an apparatus for manufacturing three-dimensional work pieces by irradiating powder layers with electromagnetic radiation or particle radiation, the leveling slider exchange arrangement comprises a powder application device adapted to apply a raw material powder onto a carrier and a leveling slider adapted to level the raw material powder applied onto the carrier by means of the powder application device. An attachment mechanism is adapted to releasably attach the leveling slider in a leveling slider attachment position in the powder application device. A storage chamber is adapted to store at least one exchange leveling slider, the storage chamber being connected to a connecting channel adapted to connect the storage chamber to the leveling slider attachment position in the powder application device. A leveling slider exchange mechanism is adapted to withdraw the exchange leveling slider from the storage chamber, to move the exchange leveling slider to the leveling slider attachment position in the powder application device via the connecting channel and to bring the exchange leveling slider into engagement with the attachment mechanism.

A computerized method, system, program product and additive manufacturing (AM) system are disclosed. Embodiments provide for modifying object code representative of an object to be physically generated layer by layer by a computerized AM system using the object code. The computerized method may include providing an interface to allow a user to manually: select a region within the object in the object code, the object code including a plurality of pre-assigned build strategy parameters for the object that control operation of the computerized AM system, and selectively modify a build strategy parameter in the selected region in the object code to change an operation of the computerized AM system from the plurality of pre-assigned build strategy parameters during building of the object by the computerized AM system.

An additive manufacturing device includes: an inner light beam radiation device of radiating an inner light beam; an outer light beam radiation device of radiating an outer light beam; and a control device. when a molten pool is irradiated with the outer light beam, the control device controls a power density of the outer light beam representing an output per unit area such that a cooling rate of the molten pool representing a temperature drop per unit time is 540? C./s or less at a freezing point of a carbide binder included in the molten pool, the molten pool being formed by irradiating a material including a hard material and a carbide binder with the inner light beam to melt the material. According to the present disclosure, the additive manufacturing device can prevent cracking and additively manufacture a high-quality shaped object with a simple configuration.