Dispositif et procédé pour prévenir la rupture d'un fil métallique
    41.
    发明公开
    Dispositif et procédé pour prévenir la rupture d'un fil métallique 失效
    装置和方法来预测的金属线的断裂。

    公开(公告)号:EP0276195A1

    公开(公告)日:1988-07-27

    申请号:EP88810010.4

    申请日:1988-01-12

    CPC classification number: B23H7/02 B23H7/04

    Abstract: Dipositif placé à la sortie d'une zone d'usinage et comportant une jauge à fuites (4) munie de deux canons (1,2) dans lesquels passe un fil métallique (3), parcouru par un courant électrique et défilant sous tension entre deux guides (8), une installation de pompage (9,10,11) injectant sous pression un fluide d'usinage à travers l'orifice (5) de cette jauge (4), un organe (7) monté à l'orifice (6) de la jauge (4) pour mesurer les fuites entre fil et canon de ce fluide, un transducteur (12) traduisant cette mesure en grandeur électrique, un comparateur (13) apte à envoyer un signal vers la commande numérique (15) dès que cette mesure atteint ou dépasse une valeur de référence. L'orifice (5) est muni d'un diaphragme (16). La commande (15) est agencée pour commander au générateur d'impulsions (14) de modifier au moins un paramètre d'usinage de façon à ramener la mesure des fuites en dessous de ou à la valeur de référence. Ce dispositif est utile pour suivre la variation de la section du fil (3) et éviter sa rupture.

    Procédé pour contrôler la forme d'une surface usinée par un fil à éroder et dispositif pour sa mise en oeuvre
    42.
    发明公开
    Procédé pour contrôler la forme d'une surface usinée par un fil à éroder et dispositif pour sa mise en oeuvre 失效
    用于执行该方法用于由线电极表面控制加工的形状的方法,和装置。

    公开(公告)号:EP0178543A2

    公开(公告)日:1986-04-23

    申请号:EP85112517.9

    申请日:1985-10-03

    CPC classification number: B23H7/04

    Abstract: Le procédé comprend la division du fil à éroder en plusieurs secteurs et la détermination du nombre de décharges produites dans chacun de ces secteurs à partir d'un instant déterminé. Ces nombres sont ensuite comparés à un ensemble de valeurs de consigne pour déterminer l'écart entre les nombres de décharges observés et les valeurs de consigne correspondantes. Dans le cas le plus simple, toutes les valeurs de consigne sont égales à la valeur moyenne du nombre de décharges par secteur. Si l'un ou plusieurs des écarts constatés dépassent des seuils prédéterminés une modification adéquate des paramètres d'usinage peut être effectuée en relation avec des écarts.

    Method and machine for machining parts using spark-erosion milling
    44.
    发明公开
    Method and machine for machining parts using spark-erosion milling 有权
    的方法和机器为使用放电铣床配件

    公开(公告)号:EP2295181A3

    公开(公告)日:2013-01-02

    申请号:EP10174798.8

    申请日:2010-09-01

    Abstract: Spark-erosion machining method and machine implementing a machining gap, a process regulator, a numerical control system, a Nominal Trajectory. The latter describes the movement of the tool electrode relative to the part as it ought to proceed if no disturbance were to occur during the machining. Information contained in the Nominal Trajectory is used to define at least two control vectors Vg, Vp which orient, within the coordinate system XYZ, two independent regulation movements. The first, or Gap Vector Vg , defines the direction in which a first regulation movement of the axes of the machine must be performed to maintain the removal of material. The second, or Position Vector Vp , defines the direction in which a second regulation movement of the axes of the machining machine must be performed to correct a tool electrode position error. The respective amplitudes of the regulation movements are calculated in real time by the process regulator.

    PROCÉDÉ ET DISPOSITIF D'USINAGE PAR ÉLECTROÉROSION.
    46.
    发明公开
    PROCÉDÉ ET DISPOSITIF D'USINAGE PAR ÉLECTROÉROSION. 审中-公开
    电火花步骤和设备

    公开(公告)号:EP2180968A1

    公开(公告)日:2010-05-05

    申请号:EP08774673.1

    申请日:2008-07-03

    CPC classification number: B23H7/04 B23H7/06 B23H7/18

    Abstract: Electron discharge machining method and device whereby a work piece (2) is machined using a tool (1) along a machining front which retreats ahead of the tool under the effect of spark erosion. The work piece and the tool are separated from one another by a machining gap. A cyclic sequence of voltage pulses (Uign) is applied between the tool and the work piece in order to generate the sparks used for erosion. The tool is moved along a number of axes (3, 4, 15) relative to the work piece. The sparks used for erosion are separated from one another by pauses (TS). A parameter (TDmoy) representative of the width of the machining gap is measured (7, 10, 11 ) in real time. The method and the device are characterized in that the variations in the width of the machining gap are countered by means of a permanent control loop (5, 7, 10, 11, 16, 20, 9, 6, 5) which governs the mean machining power (Pmoy) in accordance with a continuous law which makes the pause (TS) dependent on the parameter that represents the width of the machining gap (TDmoy). Said internal loop does not cause any change in axis. By virtue of these features, an electron discharge machining method and device are obtained that have very rapid, almost instant, control, thus eliminating the defects caused by mechanical inertia.

    Method and apparatus for controlling an electric discharge machining process
    47.
    发明公开
    Method and apparatus for controlling an electric discharge machining process 审中-公开
    Verfahren und Vorrichtung zur Steuerung eines Funkenerosionsverfahrens

    公开(公告)号:EP2179811A1

    公开(公告)日:2010-04-28

    申请号:EP08018394.0

    申请日:2008-10-21

    CPC classification number: B23H7/16 B23H7/18 B23H7/20

    Abstract: Method for controlling an electric discharge machining process, wherein a tool electrode is moved relatively to a workpiece with a working gap distance, wherein the process comprises a current and at least one previous erosion cycle, the current and the previous erosion cycle each being divided into predetermined time intervals each comprising at least one discharge pulse, wherein similar working gap conditions are present within a time interval of the previous erosion cycle and of the current erosion cycle, and wherein subsequent erosion cycles are separated by a process pause cycle, the method comprising the steps of: measuring a value of a significant process parameter within a time interval of the previous erosion cycle, the significant process parameter being indicative of the working gap distance; determining a deviation value based on the measured value and a desired value of the significant process parameter of the time interval of the previous erosion cycle; and in the current erosion cycle, controlling the relative movement of the tool electrode in the erosion direction within the time interval of the current erosion cycle based on the deviation value determined for the time interval of the previous erosion cycle and at least one instantaneous process parameter being indicative of the instantaneous process conditions.

    Abstract translation: 用于控制放电加工过程的方法,其中工具电极相对于具有工作间隙距离的工件移动,其中所述工艺包括电流和至少一个先前的腐蚀循环,所述当前和先前的腐蚀循环分为 每个包括至少一个放电脉冲的预定时间间隔,其中类似的工作间隙条件存在于先前侵蚀周期和当前侵蚀周期的时间间隔内,并且其中随后的侵蚀循环由过程暂停周期分隔,该方法包括 步骤:在先前侵蚀周期的时间间隔内测量重要工艺参数的值,所述重要工艺参数表示所述工作间隙距离; 基于所述测量值和所述先前侵蚀周期的时间间隔的显着过程参数的期望值来确定偏差值; 并且在当前的侵蚀循环中,基于针对先前腐蚀循环的时间间隔确定的偏差值和至少一个瞬时过程参数来控制工具电极在当前腐蚀循环的时间间隔内的侵蚀方向上的相对运动 指示瞬时过程条件。

    Electrical discharge machine
    48.
    发明公开
    Electrical discharge machine 审中-公开
    Elektrische Abgabemaschine

    公开(公告)号:EP2138257A1

    公开(公告)日:2009-12-30

    申请号:EP09163047.5

    申请日:2009-06-18

    CPC classification number: B23H7/02 B23H7/36

    Abstract: The electrical discharge machine comprises a tool (17) intended to machine a workpiece (15) positioned in a work tank (12) containing a machining fluid (16). A regulating device (29) for regulating the level of machining fluid in the work tank is mounted in an outlet pipe (26) connecting the work tank to a reservoir (24). It comprises a deformable element (31), such as an inflatable balloon, connected to a source of pressurized fluid. The dimensions of this deformable element (31) are controlled by a control unit (33) acting on the pressurized fluid. By virtue of the invention there is obtained reliable control over the level of machining fluid, insensitivity to soiling, and high flexibility of installation.

    Abstract translation: 放电机包括用于加工位于包含加工流体(16)的工作罐(12)中的工件(15)的工具(17)。 用于调节工作槽中的加工液体水平的调节装置(29)安装在将工作罐连接到储存器(24)的出口管(26)中。 它包括连接到加压流体源的可变形元件(31),例如可充气球囊。 该可变形元件(31)的尺寸由作用在加压流体上的控制单元(33)控制。 凭借本发明,可以获得对加工液体的水平的可靠控制,对污染的不敏感性和安装的高灵活性。

    Method and generator for electrical discharge machining
    50.
    发明公开
    Method and generator for electrical discharge machining 有权
    Verfahren und GeneratorfürFunkenerosionsbearbeitung

    公开(公告)号:EP1749608A1

    公开(公告)日:2007-02-07

    申请号:EP05016700.6

    申请日:2005-08-01

    CPC classification number: B23H1/022 B23H7/04

    Abstract: The invention relates to a method and generator for generating a time sequence of EDM pulses having a predefined ignition voltage for electrical discharge machining. An AC voltage is generated from a DC voltage, furnished by a bipolar current source (8-17). The AC voltage is applied to an isolating transformer (27) disposed between the bipolar current source (8-17) and the spark gap (EL, WS). A first pulse capacitor (47, 48, 61, 62) is charged by the bipolar current source (8-17) to a voltage corresponding to the ignition voltage. The ignition voltage provided by the isolating transformer (27) is switched with a selected polarity to the spark gap (EL, WS).

    Abstract translation: 本发明涉及一种用于产生具有用于放电加工的预定点火电压的EDM脉冲的时间序列的方法和发生器。 由双极电流源(8-17)提供的直流电压产生交流电压。 AC电压被施加到设置在双极性电流源(8-17)和火花隙(EL,WS)之间的隔离变压器(27)。 第一脉冲电容器(47,48,61,62)由双极性电流源(8-17)充电到与点火电压相对应的电压。 由隔离变压器(27)提供的点火电压以选定的极性切换到火花隙(EL,WS)。

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