Abstract:
The invention relates to a method for calibrating a milling, cutting or grinding tool of a spectacle lens frame machining unit, for which a) in a first machining step, prior to shaping an edge or surface shape RF by means of the milling, cutting or grinding tool, the lens is measured by means of an optical measuring device, b) the shaping of an edge or surface shape RF is carried out by the milling, cutting or grinding tool, c) the generated edge or surface shape RF is measured by means of the optical measuring device, d) a deviation between the surface or edge shape RF so produced and the desired surface or edge shape target values is determined, and e) the tool is calibrated at least by adjusting the control variables. The invention further relates to a device for the initial working of edges, chamfers and/or grooves at the edges of lenses, wherein an optical measuring system for measuring surface or edge shapes RF and/or edges K of the lens prior to and/or after machining the lens is provided.
Abstract:
The invention relates to a system and a method for processing optical lenses. The lenses are processed by means of different processing devices, between which a respective transferring device is arranged. The transferring devices are used both for a longitudinal as well as for a transverse conveying process. Each processing device has a dedicated conveying device which is controlled by the processing device itself. The transferring devices are controlled by a central transfer control unit.
Abstract:
The invention relates to a linear drive and the use thereof for processing an optical workpiece, wherein the linear drive has a linearly movable rotor, a linearly movable compensation member and an electrical compensation drive for moving the compensation member oppositely to the rotor, and the rotor extends into the compensation drive and/or wherein a first bearing supports the rotor in a torsionally rigid manner and a second bearing supports the rotor in a rotatable manner.
Abstract:
The invention relates to a method for automatically controlling a drive for a tool or workpiece, comprising a pilot control and a device having an automatic control unit, wherein the pilot control takes place in dependence on a motion frequency corresponding to a reference variable. As a result the contouring error can be advantageously reduced.
Abstract:
The invention relates to a subassembly consisting of a supporting element (8.2) for a machine bed (8.1) of a lathe (8), and of a machining unit (3) which is arranged on the supporting element (8.2) and has a machining axis (3.1), wherein a solid-body joint (1), via which the machining unit (3) is arranged in a movable manner on the supporting element (8.2), is provided. The invention also relates to a lathe (8) for plastics spectacle lenses, having a machine bed (8.1), having a tool mount or workpiece mount (6) which is arranged at least indirectly on the machine bed (8.1), and having a subassembly which is arranged at least indirectly on the machine bed (8.1), wherein the workpiece and the tool can be oriented in relation to one another via the solid-body joint (1).
Abstract:
The invention relates to a device and method for polishing an optical lens by means of a rotatable tool, wherein a holder for the lens can be pivoted by means of a push rod adjustment about a pivot axis transversely with respect to the axis of rotation and can be pivoted upwards out of a processing position in such a way that the lens can be replaced from above. This enables a compact design and easy replacement of the lens.
Abstract:
An apparatus and a method for processing, in particular for polishing, an optical lens are proposed, wherein both a lens changing device and a separate tool changing device are provided. The lens changing device is arranged between a working space and a conveying device for lenses and is pivotably mounted about a horizontal axis. The tool changing device is arranged laterally next to the working space.
Abstract:
The invention relates to a block piece 1 for holding an optical lens 8 to be worked in a machine tool, said block piece having a rotational axis 1.1, a holding surface 2 that can be made to face the lens 8 and a bearing surface 3 that is directed radially outwards and can be brought to bear in a workpiece spindle, wherein the holding surface 2 has at least one recess 1.2a or a number of recesses 2.1-2.6, which are distributed around the rotational axis 1.1, have a diameter DA and serve for receiving bonding compound 7 for adhesive bonding to the lens 8.
Abstract:
The invention relates to a block piece (1) for holding an optical lens (2) to be machined, with a coupling part (1.1) for holding in a workpiece chuck (3) and with a holding part (1.3) for fastening the lens (2). The holding part (1.3) has a convex or concave holding surface (1.4) corresponding to a first side (2.1) of the lens (2). The holding surface (1.4) is, according to the shape of the lens (2) to be held, provided in the form of a negative free-formng surface, and the block piece (1) is made from a plastic that can be machined.
Abstract:
A device and a method for machining a flat side of an optical workpiece are proposed. The device has two flat guides and a lateral guide for fluidically guiding a spindle unit and/or a slide. A linear drive having an associated tool is arranged on a slide having a rotary table. High-precision machining is enabled.