Display device, numerical control device, machining system, display method, numerical control method, and machining method

A numerical control device comprising:

• command position generation circuitry to generate, in every control cycle, a command position for each of a plurality of drive shafts included in a machine tool;
• detected position acquisition circuitry to acquire, in every control cycle, a detected position of the drive shafts from a position detector of each of the plurality of drive shafts;
• operational information generation circuitry to generate, based on the command position and the detected position, operational information that is information indicating an operational status of the machine tool;
• tool trajectory calculation circuitry to generate, based on the operational information, a tool trajectory that is a trajectory of a tip point of a tool attached to the machine tool;
• cutting point calculation circuitry to calculate a position, with respect to a machining target shape, of a cutting point corresponding to each of a plurality of the tip points included in the tool trajectory based on the tool trajectory, tool information that is information defining a shape of the tool, and the machining target shape;
• feature calculation circuitry to calculate a feature of machining corresponding to each of the tip points based on the operational information, the tool trajectory, and the cutting point;
• and
• display to display each of a plurality of the cutting points using an expression method indicating the feature corresponding to the cutting point.

A display method comprising:

• acquiring cutting point information indicating a position of a cutting point with respect to a machining target shape of a workpiece, the cutting point being a point at which a tool attached to a machine tool cuts the workpiece, the cutting point corresponding to each of a plurality of tip points included in a tool trajectory that is information indicating a movement path of the tip point of the tool;
• acquiring a feature indicating a characteristic of machining, the feature being calculated corresponding to each of the plurality of tip points based on operational information that is information indicating an operational status of the machine tool, the tool trajectory, and the cutting point information;
• and
• displaying each of a plurality of the cutting points using an expression method indicating the feature corresponding to the cutting point based on the cutting point information and the feature.

A numerical control method comprising:

• numerically controlling a machine tool by generating, in every control cycle, a command position for each of a plurality of drive shafts included in the machine tool based on a machining program and a numerical control parameter, and giving the generated command position to the machine tool;
• acquiring cutting point information indicating a position of a cutting point with respect to a machining target shape of a workpiece, the cutting point being a point at which a tool attached to the machine tool cuts the workpiece, the cutting point corresponding to each of a plurality of tip points included in a tool trajectory that is information indicating a movement path of the tip point of the tool;
• acquiring a feature indicating a characteristic of machining, the feature being calculated corresponding to each of the plurality of tip points based on operational information that is information indicating an operational status of the machine tool, the tool trajectory, and the cutting point information;
• and
• displaying each of a plurality of the cutting points using an expression method indicating the feature corresponding to the cutting point based on the cutting point information and the feature.

A machining method comprising:

• numerically controlling a machine tool by generating, in every control cycle, a command position for each of a plurality of drive shafts included in the machine tool based on a machining program and a numerical control parameter, and giving the generated command position to the machine tool;
• cutting a workpiece by driving the drive shafts according to the command position given by the numerical control device;
• acquiring cutting point information indicating a position of a cutting point with respect to a machining target shape of the workpiece, the cutting point being a point at which a tool attached to the machine tool cuts the workpiece, the cutting point corresponding to each of a plurality of tip points included in a tool trajectory that is information indicating a movement path of the tip point of the tool;
• acquiring a feature indicating a characteristic of machining, the feature being calculated corresponding to each of the plurality of tip points based on operational information that is information indicating an operational status of the machine tool, the tool trajectory, and the cutting point information;
• and
• displaying each of a plurality of the cutting points using an expression method indicating the feature corresponding to the cutting point based on the cutting point information and the feature.