A numerically controlled turning center (1; 100), includes a support and rotation unit (19) having a first pair of support and rotation members (21, 23) aligned with each other along a first rotation axis (A1) and a second pair of support and rotation members (25, 27) aligned with each other along a second rotation axis (A2) parallel first rotation axis (A1). There is also provided a machining head (13) with a rotary tool (13.1) movable along a first numerically controlled translation axis (X) parallel to the rotation axes (A1, A2) of the first pair of support and rotation members and of the second pair of support and rotation members. The machining head (13, 15, 17) and the support and rotation unit (19) are movable one with respect to the other in a direction (Z) orthogonal to the first rotation axis (A1) of the first pair of support and rotation members (21, 23) and to the second rotation axis (A2) of the second pair of support and rotation members (25, 27).

A numerically controlled turning center (1; 100), includes a support and rotation unit (19) having a first pair of support and rotation members (21, 23) aligned with each other along a first rotation axis (A1) and a second pair of support and rotation members (25, 27) aligned with each other along a second rotation axis (A2) parallel first rotation axis (A1). There is also provided a machining head (13) with a rotary tool (13.1) movable along a first numerically controlled translation axis (X) parallel to the rotation axes (A1, A2) of the first pair of support and rotation members and of the second pair of support and rotation members. The machining head (13, 15, 17) and the support and rotation unit (19) are movable one with respect to the other in a direction (Z) orthogonal to the first rotation axis (A1) of the first pair of support and rotation members (21, 23) and to the second rotation axis (A2) of the second pair of support and rotation members (25, 27).

A turning device has two turning stations, each with a rotatable work piece spindle to hold a lens blank, each lens blank with a turning tool for the machining of a lens blank. A method for the operation of the turning device, wherein first and the second lens blanks are simultaneously machined with the turning tools is disclosed. Control electronics attune drive signals to each other such that certain drive signals for fast tool servomotors of the turning tools accomplish at least a temporary or phase-wise opposite running of the fast tool servomotors for vibration dampening. A fabrication mechanism is provided for the manufacturing of eyeglass lenses from lens blanks with a milling device and a turning device along with a method for operating the fabrication mechanism.

A turning device has two turning stations, each with a rotatable work piece spindle to hold a lens blank, each lens blank with a turning tool for the machining of a lens blank. A method for the operation of the turning device, wherein first and the second lens blanks are simultaneously machined with the turning tools is disclosed. Control electronics attune drive signals to each other such that certain drive signals for fast tool servomotors of the turning tools accomplish at least a temporary or phase-wise opposite running of the fast tool servomotors for vibration dampening. A fabrication mechanism is provided for the manufacturing of eyeglass lenses from lens blanks with a milling device and a turning device along with a method for operating the fabrication mechanism.

The present disclosure generally relates to a turning machine comprising a first spindle which can be set in rotation for gripping and rotating a first semi-finished product to be machined, in particular to be turned, and a second spindle which can be set in rotation and is likewise suitable for gripping and rotating a second semi-finished product to be machined. A first bar load magazine associated with the first spindle is configured to convey the first semi-finished product through a first opening of the first spindle into a machining area located between the spindles. A second bar load magazine associated with the second spindle may be configured to convey a second semi-finished product through a second opening of the second spindle into the machining area.

The present disclosure generally relates to a turning machine comprising a first spindle which can be set in rotation for gripping and rotating a first semi-finished product to be machined, in particular to be turned, and a second spindle which can be set in rotation and is likewise suitable for gripping and rotating a second semi-finished product to be machined. A first bar load magazine associated with the first spindle is configured to convey the first semi-finished product through a first opening of the first spindle into a machining area located between the spindles. A second bar load magazine associated with the second spindle may be configured to convey a second semi-finished product through a second opening of the second spindle into the machining area.

After a chuck portion chucks a workpiece holding body which aligns and holds a plurality of workpieces on which components are to be placed, the posture of the workpieces held in the workpiece holding body is adjusted due to rotation mechanism by rotating the chuck portion around an axial line which extends in an aligning direction of the plurality of workpieces held in the workpiece holding body. Then, a placing head places the components on each of the plurality of workpieces which are subjected to posture adjustment.

After a chuck portion chucks a workpiece holding body which aligns and holds a plurality of workpieces on which components are to be placed, the posture of the workpieces held in the workpiece holding body is adjusted due to rotation mechanism by rotating the chuck portion around an axial line which extends in an aligning direction of the plurality of workpieces held in the workpiece holding body. Then, a placing head places the components on each of the plurality of workpieces which are subjected to posture adjustment.

A machine tool, in particular multi-spindle turning machine, comprising a machine frame, a turret body being rotatably supported by the machine frame, a plurality of workpiece spindles being arranged on the turret body, each of the workpiece spindles having a workpiece receiving portion for receiving a respective workpiece on one side of the turret body facing a working space of the machine tool, and a plurality of tool post assemblies supported by the machine frame around the turret body, wherein each tool post assembly includes a tool post having one or more tool cartridge receiving openings respectively being configured to detachably receive a tool holder cartridge TC holding a tool.

A machine tool, in particular multi-spindle turning machine, comprising a machine frame, a turret body being rotatably supported by the machine frame, a plurality of workpiece spindles being arranged on the turret body, each of the workpiece spindles having a workpiece receiving portion for receiving a respective workpiece on one side of the turret body facing a working space of the machine tool, and a plurality of tool post assemblies supported by the machine frame around the turret body, wherein each tool post assembly includes a tool post having one or more tool cartridge receiving openings respectively being configured to detachably receive a tool holder cartridge TC holding a tool.