摘要:
A method for automatically correcting the systematic errors in measurement machines and in manufacturing machines, comprising: identifying the parametric mathematical model of the machine, initially assigning, to the parameters, numerical values close to the effective values, effecting a plurality of mutually independent distance measurements, determining the differences between the experimentally measured values and the corresponding values deduced from the provisional mathematical model, to define a provisional inaccuracy index of the machine, varying said parameters to improve the inaccuracy index, proceeding iteratively to obtain the definitive mathematical model of the machine, obtaining from said mathematical model the position and possible orientation errors of the final machine member, and utilizing the error data to execute the correction.
摘要:
A system and method for positioning a fluid stream for cutting a double contour workpiece includes a compensation module (113) configured to receive information regarding a contour path in at least five degrees of freedom for cutting the double contour workpiece and a velocity of movement of the fluid stream during cutting and configured to provide as an output a modified contour path of said at least five degrees of freedom based on Kerf compensation errors. A motion controller (148) is adapted to receive the modified contour path of said at least five degrees of freedom and the velocity and is configured to provide control signals. A positioner (104) is configured to receive the control signals and position a fluid stream adjacent the workpiece accordingly.
摘要:
A system and a process are disclosed, that are automated and integrated with numerically controlled systems, for measuring compensating and testing numerically controlled machine tool heads (1) and/or tables. The system comprises: at least one support base (11) equipped with a plurality of distance sensors (14); at least one device (16) of the gage tool type composed of an elongated cylinder (17) that is equipped at one of its ends with connection means (18) for the heads (1) and is equipped at another opposite end with a ball (20), wherein the ball (20) is placed next to the sensors (14) so that they are able, always and in any position, to measure the distance that separates them from the ball (20) and determine thereby the position in the Cartesian space.
摘要:
Es wird ein Verfahren zur Kompensation der Abdrängung (A) eines Fräsers (F) beim Bearbeiten eines Werkstücks (W) mit einer numerisch gesteuerten Werkzeugmaschine mit mehreren Achsen (X, Y) offenbart, das folgende Schritte umfasst: Ausführen eines Lernschnittes an einem Testwerkstück (W) mit bekannter Geometrie mit dem an einer Werkzeugspindel befestigten Fräser (F) im Gleichlauf, dabei Ermitteln eines Zusammenhangs zwischen einer dem Drehmoment eines Antriebs der Werkzeugspindel proportionalen Größe (P4) und der Abdrängung (A) des Fräsers (F) normal zu einer Oberfläche des Testwerkstücks (W), wobei die Abdrängung (A) durch einen Vergleich der Istkontur (2) des Testwerkstücks (W) mit einer Sollkontur (1) festgestellt wird. Es folgt das Abspeichern des Zusammenhangs für den Fräser (F) und das Bearbeiten des Werkstücks (W) mit dem Fräser (F) im Gleichlauf, dabei Verwenden des abgespeicherten Zusammenhangs zur Kompensation der Abdrängung (A) des Fräsers durch Aufschalten einer der Größe (P4) proportionalen Positionskorrektur auf eine Sollposition der Achsen (X, Y) der Werkzeugmaschine.
摘要:
A corrected state space model obtained by correcting a state space model to represent a controllable system by adding an error matrix Δ to a state space model representing an uncontrollable system is designed. A control object is controlled based on a control input of the system represented by this corrected state space model. The control input is calculated by a state feedback controller. By correcting the state space model representing the uncontrollable system by the error matrix Δ, the system can be made controllable. Since the error matrix Δ is added to a state matrix, an influence of an error on an output of the system can be reduced.
摘要:
A method for automatically correcting the systematic errors in measurement machines and in manufacturing machines, comprising: identifying the parametric mathematical model of the machine, initially assigning, to the parameters, numerical values close to the effective values, effecting a plurality of mutually independent distance measurements, determining the differences between the experimentally measured values and the corresponding values deduced from the provisional mathematical model, to define a provisional inaccuracy index of the machine, varying said parameters to improve the inaccuracy index, proceeding iteratively to obtain the definitive mathematical model of the machine, obtaining from said mathematical model the position and possible orientation errors of the final machine member, and utilizing the error data to execute the correction.
摘要:
The invention relates to a method for providing dynamic state information for at least a part of a coordinate measuring machine, the coordinate measuring machine comprising a base, a probe head, a machine structure with structural components for linking the probe head to the base and at least one drive mechanism for providing movability of the probe head relative to the base. A dynamic model is defined with an actual set of state variables, the state variables being related to a set of physical properties of at least the part of the coordinate measuring machine and representing an actual state of at least the part of the coordinate measuring machine" and the actual state of at least the part of the coordinate measuring machine is derived by a calculation based on the dynamic model. According to the invention, a filtering process is executed with the dynamic model with deriving a set of prediction variables based on the state variables, the prediction variables describing an expected proximate state of at least the part of the coordinate measuring machine, measuring at least one of the state variables and determining a set of observables based on the measuring, deriving a set of successive state variables by comparing the set of prediction variables with the set of observables and updating the dynamic model using the set of successive state variables as the actual set of state variables.
摘要:
Die Erfindung betrifft ein Verfahren zur Einjustierung eines multifunktionalen Bearbeitungszentrums (1) für die spanende Fräs-Bohr und/oder Drehbearbeitung. Zur Einjustierung schwerkraftbedingten und werkstückabhängigen elastischen Bauteilverformungen an einem schwenk- und drehbaren Werkstücktisch, ohne einer zusätzlichen externen Mess- und Stelleinrichtung, wird erfindungsgemäß ein über mehrere variierende steifigkeitsrelevante Eingangsgrößen justierbares Verformungsmodell auf Basis von Verformungsmessungen justiert und dann in der Maschinensteuerung (11) des Bearbeitungszentrums als nicht veränderbares Rechenmodell fest implementiert, welches bezogen auf den jeweiligen Schwenk- und Drehwinkel der werkstücktragenden Baugruppe (2) einen Zusammenhang zwischen Werkstückmasse, Werkstückschwerpunkt und elastischer Bauteilverformung herstellt und dass mit dem Rechenmodell eine oder mehrere Positionskorrekturwerte für die berechneten elastischen Bauteilverformungen an der werkstücktragenden Baugruppe der Maschinensteuerung des Bearbeitungszentrums berechnet werden, so dass die elastische Verformung der werkstücktragenden Baugruppe in beliebiger Raumrichtung nur über die Maschinensteuerung ermittelt und einjustiert werden kann.