Patent ID: 11904399
Assignee: METAL INDUSTRIES RESEARCH & DEVELOPMENT CENTRE
Field: Machine tools (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 6:
7. The prediction method of machining accuracy according to claim 5, wherein the step of extracting the key machining feature value group A of the electrical discharge machining (EDM) apparatus comprises:
respectively processing a plurality of workpieces through the electrical discharge machining (EDM) apparatus to obtain a plurality of sets of process data, wherein each set of the process data comprises the offline electrode consumption values, the discharge voltage signals, and the discharge current signals;
establishing a plurality of machining features from the plurality of the sets of the process data;
measuring the plurality of the workpieces to obtain a plurality of measurement values through a measuring machine, wherein each measurement value is a measurement value of the plurality of the workpieces processed by the electrical discharge machining (EDM) apparatus according to the plurality of the sets of process data;
performing a correlation analysis to obtain a plurality of correlation values between the plurality of the machining features and the plurality of the measurement values; and
selecting machining features with an absolute value of a correlation value greater than 0.3 from the plurality of the correlation values as a plurality of key machining feature values.