Wire disconnection prediction device

A wire disconnection prediction device for estimating a wire disconnection risk during machining of a workpiece in a wire electric discharge machine, the wire disconnection prediction device comprising:

• a data acquisition part configured to acquire data relating to machining of the workpiece during machining of the workpiece by the wire electric discharge machine;
• a preprocessing part configured to create, based on the data acquired by the data acquisition part, a plurality of data comprising machining condition data of a condition relating to a machining condition commanded in machining of the workpiece, machining member data relating to a member used in the machining, and machining state data during machining of the workpiece, as state data indicating a state of the machining;
• a learning model storage part configured to store a learning model obtained by learning correlation between the state data indicating the state of the machining and the state where the wire of the wire electric discharge machine is not disconnected;
• and
• an estimation part configured to estimate the wire disconnection risk of the wire electric discharge machine using the learning model stored in the learning model storage part, based on the state data created by the preprocessing parts,
• wherein the preprocessing part converts the plurality of data into a unified form so as to be processable by the learning part;
• and
• the learning model storage part stores the learning model obtained by using an MT (Mahalanobis Taghchi) method to learn the correlation between the state data and the state where the wire of the wire electric discharge machine is not disconnected.