Machining simulation apparatus, machine tool, machine tool system, and machining simulation method

A machine tool system comprising:

• a machine tool comprising:
• a support configured to support a tool via a tool holding unit among a plurality of tool holding units;
• a movement device configured to move the support;
• and
• a workpiece holding device configured to hold a workpiece;
• a memory configured to store
• a plurality of constituent models obtained by respectively modeling at least some of elements that constitute the machine tool,
• a plurality of holding unit models obtained by respectively modeling the plurality of tool holding units which are attachable to the machine tool,
• a workpiece model obtained by modeling the workpiece before the machine tool machines the workpiece, and
• a machining program according to which the machine tool machines the workpiece;
• and
• a processor configured to
• set a specific tool model obtained by modeling, based on tool information, a tool which is configured to be held by one of the plurality of tool holding units in order to machine the workpiece,
• select a specific holding unit model, based on the tool information, among the plurality of holding unit models stored in the memory,
• calculate a recommendation value of a protrusion length of the specific tool model with respect to the specific holding unit model based on the tool information,
• create an assembly model in which the specific tool model and the specific holding unit model are combined such that the protrusion length is either the recommendation value or a corrected value that is calculated by correcting the recommendation value, and
• virtually execute the machining program using the plurality of constituent models, the workpiece model, and the assembly model in order to determine whether the assembly model abnormally interferes with the workpiece model or any of the plurality of constituent models.

A machining simulation method comprising:

• setting a specific tool model obtained by modeling a tool based on tool information that is input into either a machining simulation apparatus or a machine tool;
• selecting, based on the tool information, a specific holding unit model among a plurality of holding unit models obtained by respectively modeling a plurality of tool holding units and stored in a memory;
• calculating a recommendation value of a protrusion length of the specific tool model with respect to the specific holding unit model based on the tool information;
• creating an assembly model in which the specific tool model and the specific holding unit model are combined such that the protrusion length is either the recommendation value or a corrected value that is calculated by correcting the recommendation value;
• virtually executing a machining program to perform a machining simulation in which a workpiece model is virtually machined using a plurality of constituent models obtained by respectively modeling at least some of elements that constitute the machine tool, the workpiece model obtained by modeling a workpiece before machining, and the assembly model;
• and
• determining, in the machining simulation, whether the assembly model abnormally interferes with the workpiece model or any of the plurality of constituent models.