Arend, Christa

A lubrication insert, in particular for lubricating a spindle bearing, comprises: a. an elongated body having a front end and a back end apart from each other and a curved circumferential surface extended between the front end and the back end, wherein an oil inlet is provided at the front end for connecting an oil supplying line for supplying the oil into the oil inlet, wherein at least one lubrication orifice is provided on the circumferential surface for distributing the oil in the radial direction, wherein a connecting channel is formed inside the body for connecting the oil inlet and the lubrication orifice; b. at least one sealing element, in particular in the form of at least one O-ring, mounted on the outer surface of the body and positioned around the circumferential surface; and c. a connecting element which is allocated to the body by an allocation mechanism, and the sealing element is pressed in the axial direction by the connecting element when the connecting element is allocated to the body.

Eine Vorrichtung (50) dient zum Ausbringen von Kühlschmierstoffen. Die Vorrichtung (50) weist eine Versorgungsleitung (70) zur KSS-Versorgung, zumindest eine Düse (56, 156) und ein Belüftungsventil (110, 210, 310) auf. Die zumindest eine Düse (56, 156) dient als Austrittsdüse für Kühlschmierstoffe. Die Versorgungsleitung (70) ist unter Ausbildung eines Fluidpfades (108) für die Kühlschmierstoffe fluidisch mit der zumindest einen Düse (56, 156) verbindbar. Das Belüftungsventil (110, 210, 310) ist dem Fluidpfad (108) zugeordnet. Das Belüftungsventil (110, 210, 310) koppelt aus Sicht der zumindest einen Düse (56, 156) stromaufwärts an den Fluidpfad (108) an. Das Belüftungsventil (110, 210, 310) ist automatisiert zwischen einer geschlossenen Stellung und einer geöffneten Stellung umschaltbar. In der geöffneten Stellung gibt das Belüftungsventil (110, 210, 310) eine Öffnung (120, 220, 320) zwischen dem Fluidpfad (108) und dem Arbeitsraum (16) frei, um den Fluidpfad (108) zur schnelleren KSS-Entleerung zu belüften. Eine Schleifmaschine (10) ist mit einer solchen Vorrichtung (50) bestückt.

The invention provides a method for correcting a thermal displacement of a tool center point (TCP) with respect to a table of a machine tool by means of the machine tool axes whereas the positional deviations are determined using a regression model. The regression model is determined in the frame of preliminary thermo-elastic characterization experiments. The input variables used by the predefined regression model include: the measured axis position, a temperature of one or more machine parts, a measured ambient temperature, and the derivative of at least one of the ambient temperature and the temperature of a machine part.

The present invention is related to a machine tool for machining a workpiece. The machine tool comprises a machine bed, a machine table mounted on the machine bed for mounting the workpiece thereon and a machine column mounted on the machine bed for mounting a spindle thereon, wherein the machine table is configured to be translationally moved horizontally in direction of a first linear axis (X) and to be swiveled about a first swivel axis (A) which is in parallel to the first linear axis, wherein the machine table is configured to rotate about a first rotation axis (B) perpendicular to the first swivel axis, wherein the spindle is configured to be translationally moved horizontally in direction of a second linear axis (Z) and vertically in direction of a third linear axis (Y) and rotated around a second rotation axis (C) in parallel to the second linear axis.

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The present invention is related to a method for determining a condition of a wire electrode deployed in a fastwire cutting machine. The fastwire cutting machine comprises a wire traveling circuit in which the wire travels back and forth, with a first- and a second wire guiding head by which the wire electrode is guided and positioned in relation to a workpiece laying between these wire guiding heads. The wire electrode is in contact with a first- and a second electrical contact, both contacts being located on the wire traveling circuit,and that a value reflecting an electrical impedance Z_L of the wire electrode segment L between the first electrical contact and the second electrical contact is measured. The measurement of said wire electrode segment L is conducted in a dry state, and that the condition of the wire electrode is derived from the measured value reflecting the electrical impedance Z_L of said wire electrode segment L.