Machining performance management system for nc machine tool, server device, and machining status monitoring method

A server device connected via a network to an NC device attached to an NC machine tool configured to perform a machining cycle of a workpiece according to a desired machining order, the server device comprising:

• an operation history storage unit configured to store operation history data received from the NC device, the operation history data being data including a program number and indicating an execution status of an NC program;
• a scanning unit configured to periodically scan at least one piece of machining management data retained as character information in the NC device, the machining management data including an order number and a control flag, the order number being identification information that is represented by a character string corresponding to the desired machining order and that uniquely identifies a machined product and a machining type, the control flag being a flag that is set and updated based on a machining status of the workpiece according to the machining order, and the scanning unit being configured to determine, based on a value of the control flag, start and end of machining of the workpiece according to the machining order;
• an analysis unit configured to analyze, in response to determination of the end of the machining by the scanning unit, machining performance according to the machining order by referring to the operation history data associated with the order number as received from the NC device;
• and
• a machining performance storage unit configured to store machining performance data, the machining performance data including an equipment name to identify each of the NC machine tools, the order number, a machining start time, a machining end time, and the number of workpieces actually machined.

A machining status monitoring method that is executed by a server device connected via a network to an NC device attached to an NC machine tool configured to execute a machining cycle of a workpiece according to a desired machining order, the machining status monitoring method comprising:

• storing operation history data received from the NC device, the operation history data being data including a program number and indicating an execution status of an NC program;
• periodically scanning at least one piece of machining management data retained as character information in the NC device, the machining management data including an order number and a control flag, the order number being identification information that is represented by a character string corresponding to the desired machining order and that uniquely identifies a machined product and a machining type, and the control flag being a flag that is set and updated based on a machining status of the workpiece according to the machining order;
• when the control flag has a first value, determining start of machining of the workpiece according to the machining order;
• when the control flag has a second value, determining end of the machining of the workpiece according to the machining order;
• in response to determination of the end of the machining, analyzing machining performance according to the machining order by referring to the operation history data associated with the order number as received from the NC device;
• and
• storing machining performance data, the machining performance data including an equipment name to identify each of the NC machine tools, the order number, a machining start time, a machining end time, and the number of workpieces actually machined.