摘要:
The invention relates to a linear drive for a machine tool having a housing, having a carriage, which is mounted so it is axially movable in the housing via two bearings, and has a central axis and a length, and having at least one first motor, having a first motor element and a second motor element, wherein said first motor element is disposed on said carriage and said second motor element is disposed on said housing, wherein said first motor element is implemented on said carriage as a primary part and said second motor element is implemented on said housing as a secondary part. Furthermore, the invention relates to a method for moving a carriage for a lathe tool of a highly-dynamic machine tool employing a crossed roller bearing for mounting the carriage, wherein all roller bodies of said crossed roller bearing are always operationally linked to a carriage-side bearing surface, and said carriage is driven at an oscillation frequency of at least 50 Hz, in particular between 60 Hz and 200 Hz.
摘要:
A method for polishing lens surfaces, in which a) prior to the polishing process, for the purpose of determining an abrasion profile, at least one point of a workpiece is polished by means of a polishing tool to be used, using at least one pre-defined parameter; b) the polishing abrasion thus achieved on the workpiece side is determined by measuring; c) on the basis of the abrasion profile, at least one parameter is set for a subsequent polishing process, and the polishing process is completed at least partially. A method for polishing lens surfaces, in which the polishing point is places at least outside of the workpiece centre at a distance a from a plane which is tensioned by the tool spindle axis and the workpiece spindle axis. The invention furthermore relates to a lens polishing machine in which at least one movement axis is provided, by means of which a distance a between the polishing point and a plane which is tensioned by the tool spindle axis and the workpiece spindle axis can be set and/or changed.
摘要:
The invention relates to a method for machining and estimating an optical lens which is designed as a semi-finished product, with a pre-finished form of a first side and a second side to be machined, in which a pre-specified form of a surface of the second side to be machined is estimated, wherein prior to estimating the pre-specified form of the surface of the second side, an actual form of the surface of the first side is measured using measuring means and is incorporated into the estimation of the pre-specified form of the surface of the second side.
摘要:
The invention refers to a polishing tool 1 for optical lenses 10 with at least one polishing pad 7 adaptable at least partially to the shape of a lens surface 10.1 of said lenses 10 and drivable by means of a drive shaft 3, said polishing pad 7 having a membrane 7.1, wherein said polishing pad 7 can transmit a bearing force of said membrane 7.1 at least in an orthogonal direction relative to a lens surface 10.1. Moreover, the polishing tool 1 comprises a reinforcing member 2 connectable to said membrane 7.1, said reinforcing member 2 being dimensionally stable in a parallel direction relative to a surface of said membrane 7.1 and being flexible and/or pliable in an orthogonal direction relative to the surface of said membrane 7.1, wherein at least one pressure pad 16.1 with a pressure membrane 16.1′ is arranged within said polishing pad 7, wherein said pressure membrane 16.1′ can be made to bear and/or can be prestressed against said membrane 7.1 or said reinforcing member 2 in an indirect or in a direct manner.
摘要:
A machining method for an eyeglass lens blank in which a bock piece is connected, by way of a connecting material, to a first side of the eyeglass lens blank for holding and supporting the eyeglass lens blank in a processing machine, wherein to this end a cavity is made between the block piece and the first side, at least using a sealing or supporting means, wherein the sealing or supporting means has an inner diameter Dd, Ds and sits against the first side in a sealing manner, the connecting material is filled into the cavity or connecting material is provided in the cavity and then the connecting material is cured, the eyeglass lens blank is placed into a milling and/or turning or grinding machine by way of the block piece cast on by way of the connecting material, wherein the eyeglass lens blank is supported on the first side by the connecting material across a diameter Dv that corresponds to the diameter Dd, Ds and wherein the blank and the connecting material are worked off in one of the following machining processes. An eyeglass lens blank having a diameter Dr, said blank being fastened to a block piece through the cast-on connecting material, wherein the connecting material has an outer diameter Dv. The diameter Dv is at most 2 mm to 6 mm, in particular at most 4 mm and is less than diameter Dr.
摘要:
A polishing head for spectacle surfaces with a basic body for attachment to a polishing spindle, with an elastic supporting part for a polishing film which is or can be attached, wherein the supporting part comprises a recess with a wall surface and a depth t, and the polishing film comprises at least one hole, wherein the hole forms an access to the recess, wherein the polishing film comprises in addition to the hole at least one further hole, which is arranged in the area of an edge of the recess and is at a radial distance a from the hole, wherein the further hole forms an outlet channel for polishing agent from out of the recess or the wall surface is raised at least over one section of the depth t, and/or with reference to a circumference, at least in segments in relation to the rotational axis D at an angle α, and/or the supporting part comprises at least one groove which is provided in the front side with a groove base and a depth t1, which is connected to the recess and/or the supporting part comprises at least one channel with an opening which connects the recess and the front side. A method in which a reserve supply of polishing agent is filled into the recess in the supporting part prior to the conjoining of the polishing head and the surface to be polished.
摘要:
The invention relates to a block piece for holding an optical lens to be machined, with a coupling part for holding in a workpiece chuck and with a holding part for fastening the lens. The holding part has a convex or concave holding surface corresponding to a first side of the lens. The holding surface is, according to the shape of the lens to be held, provided in the form of a negative free-forming surface, and the block piece is made from a plastic that can be machined.
摘要:
A highly dynamic lens processing machine with a machine bed having at least a first tool holder and one workpiece holder with an axis of rotation and including a workpiece spindle arranged thereon. The first tool holder includes at least one dynamic linear drive with a first oscillation axis which runs parallel to the axis of rotation. The workpiece holder includes at least one dynamic linear drive in the direction of a second oscillation axis which is arranged parallel to the first oscillation axis.
摘要:
A device for machining a lens which is optically active on two sides includes a cutting and milling unit and/or a polishing unit used to machine at least a first side of the lens. A re-clamping unit is used to re-clamp the lens for machining on a second side of the lens.
摘要:
An apparatus and a method for processing an optical lens, whereby a block piece for the lens is first processed by cutting and then is provided with markings for positioning the lens on the block piece.