QUENCHING METHOD CONTROLLED NUMERICALLY

摘要

PURPOSE:To make numerical control possible to plural quenchings as object, by correcting numerically controlled data inputting quenching range with difference value between said data and position data of contact obtd. by movement in accordance with this to quench the objective local part. CONSTITUTION:At time point when heating coil of quenching apparatus providing numerically controlling mechanism NC is attained to quenching objective local part NG, quenching apparatus is moved blankly under no quenching operation according to numerically controlled data. During movement of the contact S provided near said heating coil following to the shape of a member W, position data of the contact S is obtd. Quenching apparatus is moved in accordance with numerically controlled data corrected by difference value between the data and said numerically controlled data. Coil gap to the part NG is maintained to a suitable value in which influence of strain is excluded.