Abstract:
Methods and apparatus are provided for controlling the temperature of powders in a powder-based additive manufacturing system using spatial light modulation. Powder layer temperatures can be measured and selectively controlled using a radiation source comprising a spatial light modulator. The spatial light modulator applies a visible light radiation and/or IR radiation. In addition to controlling the pre-fused temperature of the powder in the image plane, the spatial light modulator can also apply the radiation to fuse the powder.
Abstract:
The present invention relates to an optical magnifier integrated with an arbor, and more par¬ ticularly, to an optical magnifier integrated with an arbor, in which an optical magnifying unit is mounted to an arbor for connecting a cutting tool to a spindle head of a machining center, thereby performing primary numerical measurement and check for a workpiece while the workpiece is mounted to the machining center during setting, machining and checking processes for the workpiece after machining it.
Abstract:
A workpiece inspection system is disclosed for determining measurements of a workpiece on a machine tool. The system utilises a measurement device which outputs data relating to the workpiece (
Abstract:
La présente invention se rapporte à un dispositif (10) de contrôle du perçage ou du fraisurage d'une pièce (11) dont la tolérance est inférieure à 50 µm, ledit dispositif (10) comportant : - un socle (12) de maintien de ladite pièce (11) et - un outil (15) commandé numériquement apte à réaliser un usinage de type alésage ou fraisure, - au moins un moyen de mesure (25) en temps réel des contraintes subies par ladite pièce (11) lors de l'usinage par l'outil (15), et - un moyen d'analyse apte à calculer la tolérance de l'alésage ou de la fraisure à l'aide des mesures des contraintes subies par ladite pièce (11) lors de l'usinage, ledit moyen d'analyse étant apte à réaliser un contrôle de qualité de l'usinage de ladite pièce (11).
Abstract:
A method and a relevant apparatus for controlling the machining of a piece (18,38) rotating in a numerical control machine tool (33) includes the steps of detecting instantaneous values (V(i)) indicative of the dimensions of the piece during the machining, performing dynamic processing of the detected instantaneous values and controlling at least one machining phase on the basis of the processing. The method includes dynamic calculation of average values (M(j)) of sequences of the detected values, acquisition of a variation index (P) indicative of the average values trend during the machining and of a correction coefficient (K) that allows for the delay of the calculated average values with respect to the actual dimensions of the piece, and processing of an instantaneous dimension (RI) of the piece that is transmitted to the numerical control of the machine tool for controlling the machining.
Abstract:
A method to check and control a roller bending machine for continuously bending an elongated workpiece at variable curvature radii in a bending machine using a series of rollers for bending, comprises the steps of measuring the distance of the elongated work piece in a point that is situated downstream the series of rollers for bending in successive instants, calculating a curvature radius of each bend section of the elongated workpiece, comparing the calculated curvature radius with the desired curvature radius and determining a difference between them, calculating the change of position to which an upstream roller has to be subjected in order to annul such a difference and operating the upstream roller on the base of the calculated change of position. A machine embodying the method is also described.
Abstract:
A workpiece inspection system is disclosed for determining measurements of a workpiece on a machine tool. The system utilises a measurement device which outputs data relating to the workpiece ( e.g. in place of a conventional cutter). The problem of obtaining real time data relating to the position of the machine tool is overcome by recording a machine tool position data set and a measurement device data set at selected instants which are defined by a synchronisation signal. The data sets are combined later in the correct relative position because the synchronisation signal was used. The synchronisation signal can issue from the machine tool controller, an interface, measurement device or another part of the system.
Abstract:
Die Erfindung betrifft ein Verfahren zum Bearbeiten von baugleichen Werkstücken (14) mittels einer numerisch gesteuerten Werkstückbearbeitungsvorrichtung (10), umfassend die folgenden Schritte: Bearbeiten eines Werkstücks (14) unter Vorgabe einer Soll-Werkzeugbahn (34) für ein Werkzeug (12) der Werkstückbearbeitungsvorrichtung (10), Regeln eines Arbeitsabstands (22) des Werkzeugs (12) vom Werkstück (14) auf einen definierten Sollabstand, so dass das Werkzeug (12) beim Bearbeiten des Werkstücks entlang der Soll-Werkzeugbahn (34) auf einer abstandsgeregelten Ist-Werkzeugbahn (36) bewegt wird, Optimieren der Soll-Werkzeugbahn (34) für ein weiteres Werkstück (14) anhand der abstandsgeregelten Ist-Werkzeugbahn (36) des bearbeiteten Werkstücks (14) und Bearbeiten des weiteren Werkstücks (14) unter Vorgabe der optimierten Soll-Werkzeugbahn (34'), und/oder Bewerten einer Werkstückgüte des bearbeiteten Werkstücks (14) anhand der abstandsgeregelten Ist-Werkzeugbahn (36).
Abstract:
A system for making a dental restoration, comprising a 3D digitizer for producing a 3D model digital representation of a dental restoration model, a computer in communication with the 3D digitizer and capable of creating a dental restoration milling trajectory for a selected block of given dimension and given dental restoration material, based on the 3D model, and a laser milling apparatus in communication with the computer and capable of laser milling the dental restoration from the selected block positioned therein using the milling trajectory created by the computer. The laser milling apparatus includes one or more sensor for continuously monitoring the laser milling of the selected block and to provide feedback to the computer such that the milling trajectory is continuously adjusted by the computer using the feedback from the one or more sensor.
Abstract:
An apparatus for controlling a machining system is provided. The apparatus include an optical unit configured to capture an image of an object based upon radiation generated from the object and an image processing unit configured to process the image and to obtain real-time estimation of parameters associated with manufacture or repair of the object. The apparatus also includes a process model configured to establish target values for the parameters associated with the manufacture or repair of the object based upon process parameters for the machining system and a controller configured to control the process parameters for the machining system based upon the estimated and target values of the parameters associated with the manufacture or repair of the object.