Advance control for centreless rectifying grinder - has vibration sensor acting when grinder contacts piece to terminate rapid advance

摘要

The piece (27) is rectified between a stationary grinder and a mobile grinder (2) with the latter advanced rapidly from withdrawn position to apply continuous pressure to the piece (27) during rectification. The mobile grinder (2) is advanced by a motor (7, 8), which receives power through a distributor (12), and the piece-mounting (25) incorporates a detector (24) of vibrations. When the piece (27) is contacted by the mobile grinder (2), and is pushed against the stationary grinder, the detector (24) is activated. At this instant the detector (24) sends a signal to an amplifier (23). The amplifier controls the feed to a relay (22) which in turn controls the power feed to the motor. The mobile grinder (2) may be mounted on a slide (4) which is displaced by the motor in the form of a hydraulic ram (7, 8).