A simulation apparatus of a wire electric discharge machine that performs machining to cut out a core from a workpiece based on machining preconditions including a program, the simulation apparatus comprising:
- a processor configured to:
- calculate and output, when the core is cut out from the workpiece, a position and a length of a welding part on a machining path for the machining to weld the core to the workpiece,
- calculate an evaluation value to evaluate the position and the length of the welding part,
- acquire the position and the length of the welding part and the evaluation value as state data on the welding part,
- set reward conditions,
- calculate a reward based on the state data and the reward conditions,
- perform machine learning of an adjustment of the position and the length of the welding part,
- determine and output (i) an adjustment target including at least one of the position and the length of the welding part and (ii) adjustment amounts of the adjustment target as an adjustment action, based on the state data and a result of the machine learning,
- recalculate and output the position and the length of the welding part based on the adjustment action,
- perform the machine learning of the adjustment of the position and the length of the welding part based on
- (a) the adjustment action,
- (b) the state data acquired based on the recalculated position and the recalculated length of the welding part, and
- (c) the reward calculated based on the state data acquired based on the recalculated position and the recalculated length of the welding part,
- complete the machine learning in response to the calculated evaluation value being converged, and
- upon completion of the machine learning, output an optimum position of the welding part,
- wherein
- the reward conditions are set
- such that the processor is configured to calculate a positive reward
- (a) when a number of the welding parts is small, or
- (b) when a position for supporting the core is well balanced, and such that the processor is configured to calculate a negative reward
- (c) when the number of the welding parts is large, or
- (d) when the length of the welding part is shorter than a previously-set welding-parts minimum distance, or
- (e) when a magnitude of a force by which the core is supported is smaller than a previously-set prescribed threshold, or
- (f) when a magnitude of a force for dropping the core is large, or
- (g) when the position for supporting the core is poorly balanced.