摘要:
Es ist ein Verfahren zur Ermittlung zumindest einer Kenngröße (K1-K8), insbesondere einer hängenden angetriebenen Achse (5), einer Maschine (1) vorgesehen, wobei die Achse (5) mittels einer rotierenden Antriebseinheit (2) und/oder mittels einer linearen Antriebseinheit angetrieben wird. Es wird entlang eines vorgegebenen Verfahrweges (W) der Achse (5) ein auf die Antriebseinheit (2) einwirkendes Drehmoment (MF, MR) bzw. eine dazu korrespondierende Kraft gemessen. Erfindungsgemäß wird das Drehmoment (MF, MR) bzw. die Kraft in Vorwärts- und Rückwärtsrichtung gemessen. Es werden energieerhaltende Momente (K2-K4, K8) bzw. energieerhaltende Kräfte einerseits und/oder reibungsabhängige Momente (K1, K5-K7) bzw. reibungsabhängige Kräfte andererseits durch rechnerische Überlagerung von zugehörigen Drehmoment- bzw. Kraftwerten als die zumindest eine richtungsunabhängige Kenngröße (K1-K8) ermittelt.
摘要:
A method of evaluating an accuracy in which an operating accuracy of a machine can be easily evaluated on the side of a numerically controlled system without using a special measuring device. For example, during execution of a circular arc processing program (14a) for evaluating an accuracy by the processor (11) of a numerically controlled system (10) with numerically controlled machine (30) idly operated, machine operating positions in directions of an X-axis and a Y-axis are periodically measured in response to position feedback signals output from pulse coders provided on servo motors of the X-axis and the Y-axis of a machine tool, and stored in a memory (13). Upon completion of the execution of the program, a radius of an operating path and an error with respect to a specified radius on the X-Y plane of the machine tool are calculated by the processor based on the measured positions in the directions of the X-axis and the Y-axis. The machine operating path is displayed on the display unit (16a) together with the specified path and allowable external and internal paths for the accuracy evaluation by the operator in accordance with image signals produced by a graphic control circuit (16) based on the calculated path or the calculated radius error, the radius specified by the program and allowable upper and lower limit radii.
摘要:
L'invention concerne des systèmes assistés à commande numérique par ordinateur du type de ceux conçus pour recevoir des instructions de programme de pièce définissant une trajectoire désirée (110) de mouvement entre un outil (12) et une pièce d'usine (w), où ladite trajectoire peut comprendre une partie courbe vers l'intérieur ou vers l'extérieur que doivent effectuer par un mouvement linéaire coordonné des éléments de la machine, le long de deux axes linéaires orthogonaux au moins (X, Y). L'invention décrit des appareils et des procédés permettant de corriger les erreurs de rayon de la trajectoire (E) pour faciliter le mouvement précis et rapide le long de la courbe. On décrit ainsi une correction de rayon de la trajectoire par le biais de commandes de positions (52, 53, 54 et 55), que reçoit le servomécanisme (69) utilisant lesdites données de rayon corrigées (46), la différence entre ces dernières et le rayon désiré (R) à usiner compensant en partie au moins l'erreur de rayon de la trajectoire (E) qui autrement serait produite par le servomécanisme (69).
摘要:
A calibration device (30) for a machine tool is described that includes a base (36) attachable to a machine tool and a calibration artefact (32), such as a sphere of known radius. A deflection mechanism attaches the calibration artefact to the base and allows movement of the calibration artefact (32) relative to the base (36) when an external force is applied to the calibration artefact (32). The deflection mechanism also maintains the calibration artefact (32) in a defined rest position relative to the base (36) in the absence of an applied external force. A sensor (46) is provided for sensing the extent of movement of the calibration artefact (32) relative to the base (36). A method of using the device (30) with a reference tool to accurately determine a position of a calibration artefact (32) is also described.
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:
The invention relates to servo-driven computer-numerically-controlled systems of the type adapted to receive part program instructions defining a desired path [110] of relative movement between a tool [12] and a workpiece [W], wherein the path may include an interior or exterior curved portion to be effected by coordinated linear movement of machine members along at least two orthogonal linear axes [X,Y]. The invention provides apparati and methods for correcting path radius errors [E] to facilitate rapid and accurate movement along the curve. The invention carries out path radius correction by generating position commands [52,53,54 and 55] received by the servo [69] using corrected radius data [46], the difference between which and the desired radius [R] to be machined compensates for at least a portion of the path radius error [E] that would otherwise be generated by the servo [69].
摘要:
The invention relates to servo-driven computer-numerically-controlled systems of the type adapted to receive part program instructions defining a desired path [110] of relative movement between a tool [12] and a workpiece [W], wherein the path may include an interior or exterior curved portion to be effected by coordinated linear movement of machine members along at least two orthogonal linear axes [X,Y]. The invention provides apparati and methods for correcting path radius errors [E] to facilitate rapid and accurate movement along the curve. The invention carries out path radius correction by generating position commands [52,53,54 and 55] received by the servo [69] using corrected radius data [46], the difference between which and the desired radius [R] to be machined compensates for at least a portion of the path radius error [E] that would otherwise be generated by the servo [69].