| 摘要 |
A controlled spindle drive is utilized for producing an axially acting clamping force for the purpose of clamping/releasing tools or workpieces on the work spindle of machine tools. A two-part spindle shaft is enclosed coaxially by a ring which can be displaced axially between two end positions. In one end position, the ring connects the two spindle-shaft parts to form a spindle shaft, which acts as a whole, for a normal operation as a machine spindle. In the other end position, the spindle-shaft part with the tool or workpiece mounting, is connected in a fixed manner to the non-rotating spindle housing. The non-secured spindle-shaft part then acts exclusively on the task-specific clamping/release mechanism. The controlled spindle drive, which acts on the non-secured spindle-shaft part, can actuate the clamping mechanism exclusively. Instead of the axially displaceable, coaxially disposed ring, it is possible to use a second controlled spindle drive which drives the spindle-shaft part with the tool or workpiece mounting independently. The drive operations for the two drives are coupled via an axis interpolation.
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