Abstract:
The present invention provides methods allowing the use of selective laser powder processing techniques for the production of medically acceptable prosthetic dental frameworks. The frameworks produced according to the present invention have high grade mechanical properties as well as a high accuracy.
Abstract:
The present invention relates to a method and a device to monitor and control the Selective Laser Powder Processing. A Selective Laser Powder Processing device comprising a feedback controller to improve the stability of the Selective Laser Powder Processing process is presented. A signal reflecting a geometric quantity of the melt zone is used in the feedback controller to adjust the scanning parameters (e.g. laser power, laser spot size, scanning velocity,...) of the laser beam (4) in order to maintain the geometric quantity of the melt zone at a constant level. The signal reflecting the geometric quantity of the melt zone can also be displayed in order to monitor the Selective Laser Powder Processing process. The present invention allows for the production of three-dimensional objects from powder material and improves the state of the art by compensating variations of the border conditions (e.g. local heat conduction rate) by a feedback control system based on a geometric quantity of the melt zone resulting in e.g. a lower amount of dross material when overhang planes are scanned.
Abstract:
Verfahren zum Herstellen eines dreidimensionalen Bauteils (1) durch ein Laserschmelzverfahren, bei welchem das Bauteil (1) durch aufeinanderfolgendes Verfestigen einzelner Schichten aus durch Einwirkung einer Strahlung verfestigbarem Baumaterial (4) durch Aufschmelzen des Baumaterials (4) erfolgt, wobei der durch einen punkt- und/oder linienförmigen Energieeintrag erzeugte Schmelzbereich (5) durch eine Sensorvorrichtung (6, 11, 12, 18) erfasst wird und daraus Sensorwerte zur Evaluierung einer Bauteilqualität hergleitet werden, wobei die zur Evaluierung der Bauteilqualität erfassten Sensorwerte zusammen mit den die Sensor-Werte im Bauteil (1) lokalisierenden Koordinatenwerten abgespeichert und mittels einer Visualisierungseinrichtung (29) in zwei- und/oder mehrdimensionalen Darstellung bezogen auf ihren Erfassungsort im Bauteil dargestellt werden.
Abstract:
The present invention relates generally to a method and device of partial or complete functional restoration of the damaged nervous system by bridging a cavity in the central or peripheral nervous tissue and, more particularly to a system and method for repairing the nerve signal transduction by bridging of the cavity with microelectrode elements more particular microelectrodes for stimulation and microelectrodes for recording.
Abstract:
The present invention relates generally to a method and device of partial or complete functional restoration of the damaged nervous system by bridging a cavity in the central or peripheral nervous tissue and, more particularly to a system and method for repairing the nerve signal transduction by bridging of the cavity with microelectrode elements more particular microelectrodes for stimulation and microelectrodes for recording.
Abstract:
The invention relates to a method for producing a three-dimensional component (1) by means of a laser melting process, in which the component (1) is produced by consecutively solidifying individual layers made of building material (4) by melting the building material (4), wherein said building material can be solidified by the action of radiation, wherein the melting area (5) produced by a punctiform and/or linear energy input is detected by a sensor device (6, 11, 12, 18) and sensor values are derived therefrom in order to evaluate the component quality. The sensor values detected in order to evaluate the component quality are stored together with the coordinate values that locate the sensor values in the component (1) and are displayed by means of a visualization unit (29) in two- and/or multi-dimensional representation with respect to the detection location of the sensor values in the component.