Centering machine for workpieces, particularly optical lenses

A centering machine for workpieces comprising:

• two centering spindles including respective rotationally drivable centering spindle shafts which are mounted in respective centering spindle housings and being axially aligned with respect to a centering axis,
• the centering spindle shafts being constructed for respective mounting of a respective clamping bell at mutually facing ends,
• a stroke device which is for axially moving in an adjustable manner one of the centering spindle shafts with respect to the other one of the centering spindle shafts along the centering axis to align a workpiece between the clamping bells,
• a clamping device for applying a clamping force to one of the centering spindle shafts so as to clamp the workpiece aligned between the clamping bells,
• at least one processing unit with a tool for edge processing of the workpiece clamped between the clamping bells, the processing unit being movable relative to the centering axis, a
• the stroke device and the clamping device being arranged coaxially with respect to the centering axis, and
• the centering spindle shaft axially adjustable by way of the stroke device being rotationally drivable by a rotary drive arranged as the stroke device to be coaxial with respect to the centering axis.

A centering machine for workpieces comprising:

• two centering spindles including respective rotationally drivable centering spindle shafts which are mounted in respective centering spindle housings and being axially aligned with respect to a centering axis,
• the centering spindle shafts being constructed for respective mounting of a respective clamping bell at mutually facing ends,
• a stroke device which is for axially moving in an adjustable manner one of the centering spindle shafts with respect to the other one of the centering spindle shafts along the centering axis to align a workpiece between the clamping bells,
• a clamping device for applying a clamping force to one of the centering spindle shafts so as to clamp the workpiece aligned between the clamping bells,
• at least one processing unit with a tool for edge processing of the workpiece clamped between the clamping bells, the processing unit being movable relative to the centering axis, a
• the stroke device and the clamping device being arranged coaxially with respect to the centering axis,
• the axially adjustable centering spindle shaft is axially displaceable and rotatably mounted in the centering spindle housing by an air bearing arrangement,
• the centering spindle shaft axially adjustable by way of the stroke device being rotationally drivable by a rotary drive arranged as the stroke device to be coaxial with respect to the centering axis;
• and
• the air bearing arrangement having at least two air bearing sections, wherein the rotary drive is arranged axially between the air bearing sections.

A centering machine for workpieces comprising:

• two centering spindles including respective rotationally drivable centering spindle shafts which are mounted in respective centering spindle housings and being axially aligned with respect to a centering axis,
• the centering spindle shafts being constructed for respective mounting of a respective clamping bell at mutually facing ends,
• a stroke device which is for axially moving in an adjustable manner one of the centering spindle shafts with respect to the other one of the centering spindle shafts along the centering axis to align a workpiece between the clamping bells,
• a clamping device for applying a clamping force to one of the centering spindle shafts so as to clamp the workpiece aligned between the clamping bells,
• at least one processing unit with a tool for edge processing of the workpiece clamped between the clamping bells, the processing unit being movable relative to the centering axis, and
• the centering spindle shaft axially movable in an adjustable manner by way of the stroke device being rotationally drivable by a rotary drive arranged as the stroke device to be coaxial with respect to the centering axis.