Abstract:
A solid freeform manufacturing system includes a manufacturing chamber containing a powder based additive manufacturing device. The manufacturing chamber is connected to an environmental control chamber. The environmental control chamber contains environmental control devices including fans, filters, and an inert gas source. An interconnection between the environmental control chamber and manufacturing chamber allows an inert, contaminant free manufacturing environment.
Abstract:
Disclosed is a method for non-vacuum electron beam welding metallic materials by means of a vacuum electron beam gun and with the aid of process gas. According to the inventive method, at least one inert gas (11, 28) is used in addition to the process gas (33), said inert gas (11, 28) being used in different manners and compositions by means of an inert gas supply apparatus in the form of a nozzle configuration (2), which is arranged on the vacuum electron beam gun (1). According to the invention, a process gas (33) is used that contains helium and 40 to 80 percent by volume of nitrogen, with/without admixing hydrogen and/or oxygen, while the inert gas contains argon, helium, and optionally added oxygen and nitrogen. The inventive method and the inventive device allow for optimal process control and thus inexpensive and quality-responsive material processing.
Abstract:
Es wird ein Verfahren zur Herstellung von insbesondere konischen Bohrlöchern (48) in Werkstücken (22) angegeben, bei welchem die Konturierung und die Querschnittsform des Bohrloches (48) dadurch beeinflusst werden kann, dass einer oder mehrere Arbeitsparameter geändert werden, die aus der nachstehenden Gruppe ausgewählt sind: Impulslänge, Strahldurchmesser, Strahlstrom, Beschleunigungsspannung, Strahlfokussierung, Ablage des Elektronenstrahles (12) von einer Strahlachse, Bewegungsgeschwindigkeit des Elektronenstrahles (12) über das Werkstück (22).
Abstract:
Verfahren zum Löten oder Schweißen von Bauteilen in einer Serienfertigung, vorzugsweise zum Fügen von Fahrzeug-Karosserieteilen, bei dem a) längs einer von den Bauteilen (1, 2) gebildeten Fuge durch Schmelzen eines Verbindungsmaterials (3), das als Zusatzwerkstoff zugeführt oder von einem Grunderkstoff der Bauteile (1, 2) gebildet wird, eine die Bauteile (1, 2) verbindende Fixiernaht (11) erzeugt a) und auf die Fixiernaht (11) durch Schmelzen eine volumenbildende Lage (12) Verbindungsmaterial (3) aufgetragen oder die mittels des als Zusatzwerkstoff zugeführten Verbindungsmaterials erzeugte Fixiernaht (11) umgeschmolzen wird.
Abstract:
An improved vehicle wheel and method for producing the same, the vehicle wheel including a rim including at least an inboard portion, generally axially extending well, and an outboard portion, and a disc including at least an inner annular wheel mounting portion and an outer annular portion. The disc is joined to the rim by a non-vacuum electron beam welding process to produce a vehicle wheel including an inboard tire bead seat retaining flange, an inboard tire bead seat, a well, an outboard tire bead seat, and an outboard tire bead seat retaining flange. The method for producing the vehicle wheel includes the steps of: (a) providing a rim including at least an inboard portion, generally axially extending well, and an outboard portion; (b) providing a disc defining a disc axis and including at least an inner annular wheel mounting portion and an outer annular portion; (c) initially joining the rim and the disc together by a plurality of tack welds; and (d) joining the rim and the disc together by a non-vacuum electron beam welding process to produce the vehicle wheel, the non-vacuum electron beam welding process joining the rim and the disc together by a single continuous at least 360 DEG weld.
Abstract:
The invention relates to a method for forming a three-dimensional article through successive fusion of locations of a powder bed. The method comprising: providing a model of said three-dimensional article; applying a powder layer on a work table; determining a maximum scan length of an energy beam; directing said energy beam from a first energy beam source over said work table with constant energy causing said first powder layer to fuse in first selected locations according to said model to form a first cross section of said three-dimensional article, wherein locations with a shorter scan length than said maximum scan length is provided with a time sink before and/or after said scan line so that the time period between each two adjacent scan lines is constant throughout the manufacture of said three-dimensional article.
Abstract:
Bisherige Auftragsschweißverfahren haben den Nachteil, dass sich aufgrund der Bildung von niedrigschmelzenden Phasen oder Oxiden Risse nach dem Schweißen oder während des Einsatzes bilden. Durch das erfindungsgemäße Schutzgasgemisch und das Verfahren zum Auftragsschweißen wird die Bildung von solchen Phasen oder Oxiden verringert.
Abstract:
A method of fusion welding in the atmosphere with the use of an electron beam (3) consists in generating an electric arc (6) along the major part of the beam (3) path, the discharge current in that arc being directed oppositely to the electron flow in the beam (3). The method is intended preferably for welding large-sized articles made of refractory materials.
Abstract:
The present invention generally relates to methods and apparatuses adapted to perform additive manufacturing (AM) processes and the resulting products made therefrom, and specifically, to AM processes that employ an energy beam to selectively fuse a base material to produce an object. More particularly, the invention relates to methods and systems that use reactive fluids to actively manipulate the surface chemistry of the base material prior to, during and/or after the AM process.
Abstract:
A method of cutting a super-hard material (8) using an electron beam (6), wherein the electron beam (6) is directed onto a surface of the super-hard material (8) and moved relative to the surface such that the electron beam (6) moves across the surface of the super-hard material (8) at an electron beam scanning velocity in a range 100 to 5000 mms -1 to cut the super-hard material (8).