Machine tool management system and method for managing machine tool

A method for managing a machine tool, the method comprising:

• detecting a physical quantity;
• recording, in a memory, a time point at which detection information with respect to the machine tool has been detected and the detection information corresponding to the time point, the detection information including the physical quantity;
• comparing the physical quantity included in the detection information with an abnormality determination threshold;
• determining selected detection information among the detection information, the selected detection information satisfying a determination condition in which the physical quantity is in excess of the abnormality determination threshold;
• recording, in the memory, the selected detection information corresponding to the time point;
• displaying, on the display, a list of the selected detection information according to predetermined display items, unselected detection information being excluded from the list, the unselected detection information being other than the selected detection information among the detection information;
• extracting from the memory at least part of the detection information including one of the selected detection information corresponding to one display item selected among the display items listed on the display;
• and
• displaying, on the display, a graph of a change over time in data included in the at least part of the detection information such that data included in the one of the selected detection information is distinguishable in the graph.

A machine tool management system comprising:

• a machine tool configured to machine a workpiece;
• a memory;
• a display;
• a detector configured to detect a physical quantity;
• and
• a control circuit connected to the memory and configured to:
• record, in the memory, detection information detected from the machine tool in relation to a time point at which the detection information was detected, the detection information including the physical quantity;
• compare the physical quantity included in the detection information with an abnormality determination threshold;
• determine whether the detection information is selected detection information that satisfies a predetermined determination condition in which the physical quantity is in excess of the abnormality determination threshold;
• record, in the memory, a plurality of pieces of the selected detection information respectively in relation to time points at which the plurality of pieces of the selected detection information were detected;
• display, on the display, a list of at least one piece of selected detection information among the plurality of pieces of the selected detection information using a predetermined display item, unselected detection information being excluded from the list, the unselected detection information being other than the selected detection information among the detection information;
• upon selection of one predetermined display item from among a plurality of predetermined display items listed on the display, extract from the memory a plurality of pieces of detection information including one piece of selected detection information, among the plurality of pieces of the selected detection information, that corresponds to the selected one predetermined display item;
• make a graph of a change over time of data included in the plurality of pieces of extracted detection information;
• display the graph on the display;
• and
• in the graph, display a position corresponding to data included in the selected one piece of detection information corresponding to the selected one predetermined display item such that the position is distinguished from another position.