Patent application number | Description | Published |
20110065361 | Device For Finish-Machining of Optically Effective Surfaces of, In Particular, Spectacle Lenses - A device for finish-machining of the optically effective surfaces of, in particular, spectacle lenses has a spindle shaft, which has a tool mount section and which is mounted in a spindle housing to be rotatable about a workpiece rotational axis (A). An electric rotary drive has a rotor and a stator by which the spindle shaft operatively connected with the rotor is drivable to rotate about the tool rotational axis. An adjusting device axially displaces the tool mount section with respect to the spindle housing in the direction of the tool rotational axis (linear movement Z). The rotor and the stator are arranged coaxially with the spindle shaft, wherein at least the rotor together with the spindle shaft is axially displaceable with respect to the spindle housing in the direction of the tool rotational axis by the adjusting device. | 03-17-2011 |
20110067628 | Device For Blocking Workpieces, Particularly Spectacle Lenses, For The Processing And/Or Coating Thereof - A device for blocking workpieces for the processing and/or coating thereof, has a support surface for positioning the workpiece to be blocked, a blocking station in which the workpiece can be blocked on a blocking piece by a temporarily deformable blocking material, and a transport device which has a retaining head for the workpiece and by which a relative movement can be created between the workpiece being retained at the retaining head, and the support surface and the blocking station. The transport device has at least four position-controlled movement axes, by which to position the workpiece in a defined manner in consideration of the orientation and geometric information relative to a blocking piece located in the blocking station, and can be retained in the defined relative position to the blocking piece during blocking while leaving a blocking material accommodation gap between the workpiece and the blocking piece. | 03-24-2011 |
20110084433 | Device For Finish-Machining Of Optically Effective Surfaces Of Workpieces, In Particular Spectacle Lenses | 04-14-2011 |
20120135672 | Polishing Tool for Finishing Optically Effective Surfaces on Spectacle Lenses in Particular - The proposed polishing tool has a base body with an open interior space with which the polishing tool can be slidably fitted onto a holder of a tool spindle, initially as far as a latching position. A retaining ring placed in an annular groove of the interior space engages in a counter-groove of the holder. The polishing tool can then be slid further onto the holder under the polishing work pressure, until, under the simultaneous action of torque, driver elements of the base body engage in driver counter-elements of the holder for transmitting rotary movement. At least in the latter relative position between the polishing tool and tool spindle, the retaining ring provides a seal against penetration of the abrasive polishing agent. | 05-31-2012 |
20130344778 | Device For The Fine Machining Of Optically Active Surfaces On, In Particular, Spectacle Lenses - A device for the fine machining of optically active surfaces in particular spectacle lenses, has a spindle shaft which has a tool-holder portion and is mounted in a spindle housing such that it can rotate about a tool rotation axis. The device has an electric rotary drive with a rotor and a stator that rotates the spindle shaft operatively connected to the rotor about the tool rotation axis. The tool-holder portion can be displaced axially in the direction of the tool rotation axis. The rotor and the stator parts are axially guided in a guide tube along the tool rotation axis. The spindle shaft is in the form of a hollow shaft, via which the tool-holder portion, which is configured to hold a membrane chuck, can be subjected to a fluid. | 12-26-2013 |
20140366692 | Device For Supplying A Liquid Cooling Lubricant To A Cutting Edge Of A Lathe Tool - A device for supplying a liquid cooling lubricant to a cutting edge of a lathe tool is operatively connected with a fast-tool servo by way of a tool holder in order to be able to execute oscillating movements in an advance direction in common with the tool holder. A first connection is stationary with respect to a housing of the fast-tool servo, for a cooling lubricant source and an outlet, which is in fluid connection with the first connection, for delivery of a cooling lubricant jet to the lathe tool. The outlet is provided at the tool holder and is in fluid connection with the first connection by way of a hose portion so that the cooling lubricant jet delivered via the outlet always impinges at a predetermined point on the cutting edge of the lathe tool even when stroke movements of the tool holder take place. | 12-18-2014 |
20150038061 | Device for Fine Machining of Optically Effective Surfaces on In Particular Spectacle Lenses and Flexible Production Cell Comprising Such a Device - The invention relates to a polishing machine for spectacle lenses, including a least one workpiece spindle protruding into a workspace for a rotary drive of the spectacle lens about a workpiece rotational axis. At least one feed device lowers and raises a polishing tool relative to the spectacle lens. An oscillation drive unit moves the feed device back and forth in an oscillation direction, which during the polishing runs substantially transversely to the workpiece rotational axis. A swivel drive unit swivels the feed device about a swivel-adjusting axis which runs substantially perpendicular to the workpiece rotational axis and substantially normal to the oscillation direction. A swivel mechanism is provided to swivel the feed device, the oscillation drive unit and the swivel drive unit relative to the workpiece. | 02-05-2015 |
20150047479 | Machine for Processing Optical Workpieces, In Particular Plastic Spectacle Lenses - The invention relates to a machine for processing plastic workpieces. A machine housing surrounds a working chamber located between a workpiece spindle for rotationally driving the workpieces about a workpiece axis of rotation and a fast tool servo for producing an oscillating feeding movement of a rotary tool in the direction of the workpieces. The workpiece spindle is provided with a carriage which can be driven and is guided on at least two guide surfaces of a guiding arrangement in order to produce a relative advancing movement between the workpiece and the rotary tool. The advancing movement runs transversely with respect to the feeding movement and defining therewith a processing plane in which during processing the rotary tool engages with the workpiece. The guiding arrangement is mounted on the machine housing such that the processing plane extends between the two guide surfaces. | 02-19-2015 |