Monitoring device for clamped state of tool in working spindle - contains tool holder position sensor, electronic evaluation unit storing holder clamp positions during tool changing as reference positions

摘要

The device contains a sensor (15) for the position of a tool holder (4) and an electronic processing unit (16) connected to the machine tool's program controller (17) which detects abnormal clamping states from the sensor signals and passes corresp. information to the controller. During tool changing and after actuation of an ejector (8) the holder position is detected and compared with a reference value for the free position. The program controller is activated if the detected position is less than the reference value. The clamp position of the holder during each changing process is specially detected and stored as the reference for the ejection position. USE/ADVANTAGE - Abnormal positions and states of an inserted or replaced tool are reliably detected and correct and timely control measures taken before tool changer damage occurs.