Machine tool comprising a device for collision monitoring

摘要

A numerically controlled machine tool for machining a workpiece is provided. The machine tool includes a work spindle, at least one feed axis, and a device for collision monitoring on said machine tool, wherein the device for collision monitoring includes a collision sensor mounted on a machine part of the machine tool, collision detection means for detecting a collision of machine parts of the machine tool when a measuring value detected by the collision sensor exceeds a collision limit value, and signal output means for outputting a stop signal for stopping the at least one work spindle and the at least one feed axis, of the machine tool when the collision detection means detects a collision. The machine tool includes a unit for determining the collision limit value on the machine tool.

主权项

1. A numerically controlled machine tool comprising:
a milling head supporting a work spindle, at least one feed axis, and a monitoring device configured to perform collision monitoring on said machine tool; wherein the monitoring device comprises: a collision sensor mounted on the milling head of the machine tool, the collision sensor comprising a vibration sensor configured to detect a vibration of the milling head supporting the work spindle, a collision detector configured to detect a collision of machine parts of the machine tool when a measuring value detected by the collision sensor exceeds a collision limit value, and signal output interface adapted to output a stop signal for stopping the at least one work spindle and the at least one feed axis of the machine tool when the collision detector detects a collision; and a determination unit configured to automatically set the collision limit value on the machine tool for a second machining period on a basis of a maximum measuring value detected by the collision sensor during a first machining period, wherein the first machining period is a reference cycle of reference machining a first workpiece based at least one portion of an NC (numerical control) program, and the second machining period is a machining cycle, being performed subsequent to the first machining period, of machining a second workspiece based on the same at least one portion of the same NC (numerical control) program underlying the reference machining of the first machining period.