Patent ID: 6237585
Filing Date: 2001-05-29
Classification: B23D

Abstract:
A wire-sawing machine comprising;a plurality of grooved rollers having a plurality of grooves for travel paths of an ingot-slicing wire on peripheries thereof,a first wire reel for sending a new wire through deflector rollers to said grooved rollers,a second wire reel for winding a wire sent out from the grooved rollers through other deflector rollers,a tensioner for applying a predetermined tension to the travelling wire,at least a tension sensor for detecting a tension applied to said wire, provided at a position between the grooved rollers and said deflector rollers,calculating and judging circuits to which a detected value of said tension applied to said wire is inputted for judging a sign predicting abnormal increase of the tension from a fluctuating gap of said tension, a fluctuation velocity of the tension and/or an acceleration of said tension, anda controller to which a signal predicting abnormal increase of said tension is inputted from the calculating and judging circuits for outputting an operation-stop signal or an alarm in correspondence with the predicting signal.