METHOD FOR RE-THREADING WORKS BY NC LATHE AND NC LATHE HAVING FUNCTION OF RE-THREADING

摘要

PURPOSE: To allow re-threading works to be carried out by a NC lathe while neither yield nor efficiency is degraded. ;CONSTITUTION: A contact type sensor 8 is provided for the tool rest datum 11 of a NC lathe A. The dislocation of the thread ridge 6 of a machined material 2 in which the thread ridge has been formed with respect to the tool rest datum 11, is measured by the contact type sensor 8, and a starting point for threading is determined based on the result of measurement, so that the machined material 2 is re-threaded.;COPYRIGHT: (C)1994,JPO&Japio