Spannantrieb, insbesondere für rotierend angetriebene Spannmittel von Werkzeugmaschinen

摘要

The pressure chambers (5,6) can be cut off by check valves (15,16) and are provided with a pressure monitoring device. The chambers are fed with pressure medium by a piston rod (7) of the clamping piston and a static through passage (9), in which the piston rod is located. Each pressure chamber for a separate and independent pressure measurement has its own pressure sensor (17,18) with pressure-proportional, electrical signal emission. Electrically, the analogue difference pressure signal is formed from the two pressure measurements of the two pressure chambers.