| 摘要 |
PURPOSE:To allow a tool to return automatically to its original position without interfering with a work when interrupting machining temporarily by continuing the machining of a process automatically based on stored machining data on the process such as the process number, machining type, etc. CONSTITUTION:The process number of a process and the machining type of rough-machining, etc., e.g., in case of the rough-machining, memory contents of a rough-machining buffer, etc. are stored. An emergency return flag is set in an NC control unit. Next, after a special treatment is performed to the tool feed defined by the machining profile of a tool, the tool is quickly returned to the relay point of the process and is quickly returned to its original position, then a main shaft is stopped rotating. An emergency return flag is set at an emergency return flag set step 30, whether to perform machining or not is checked at a thread machining confirmation step 31, and if the answer is ''no'', an emergency return is performed at a command step 32, a quick feed is performed at a quick feed command step 33, the tool is quickly fed to its original position at a quick return command step 34, and the main shaft is stopped at a command step 35. |
