Machining condition search device and machining condition search method

A machining condition search device, comprising:

• processing circuitry configured to
• generate a machining condition including a plurality of control parameters settable in a machining apparatus;
• cause the machining apparatus to perform machining in accordance with the generated machining condition;
• collect machining result information indicating a machining result of the machining performed by the machining apparatus;
• calculate at least one provisional evaluation value for the performed machining on a basis of the collected machining result information, the at least one provisional evaluation value including a plurality of provisional evaluation values;
• determine whether or not the at least one provisional evaluation value has converged on a basis of the calculated provisional evaluation values in time series, and estimate an estimated convergence value to be a convergence destination of the at least one provisional evaluation value when it is determined that the at least one provisional evaluation value has not converged;
• determine whether or not to terminate the machining under the machining condition being tried before the at least one provisional evaluation value converges when it is determined that the at least one provisional evaluation value has not converged;
• end the machining in accordance with the machining condition for the machining apparatus when the processing circuitry determines to terminate the machining under the machining condition being tried and determine the estimated convergence value as an evaluation value of the machining performed in accordance with the machining condition, and determine, when the processing circuitry determines not to terminate the machining under the machining condition being tried, a convergence value of the at least one provisional evaluation value as the evaluation value after the processing circuitry determines that the at least one provisional evaluation value has converged;
• predict a prediction value of the evaluation value corresponding to the machining condition untried on a basis of the determined evaluation value and the machining condition corresponding to the evaluation value;
• and
• determine whether or not to end a search for the machining condition, determine the machining condition that is optimum on a basis of the determined evaluation value when ending the search, and generate the machining condition to be tried next on a basis of the prediction value when not ending the search,
• wherein until the processing circuitry determines to end the search, the processing circuitry repeatedly performs each of aforementioned processes.