Numerical control device

A numerical control device comprising:

• rotation command output circuitry to output a rotation command to relatively rotate a workpiece and a tool;
• and
• feed command output circuitry to output a feed command to relatively move the workpiece and the tool,
• the feed command being able to include a vibration motion command to alternately repeat a forward motion and a backward motion,
• the vibration motion command including, in one vibration,
• a first section for travel at a first speed that is a travel speed during the forward motion,
• a second section for travel at a second speed that is a travel speed during the backward motion, and
• a third section for travel at a third speed that is a travel speed during the forward motion and is a speed lower than the first speed, wherein
• the numerical control device comprises an individual section ratio determination circuitry to determine ratios of the first section, the second section, and the third section in one vibration in the vibration motion command, and
• the section ratio determination circuitry determines the ratios of the first section, the second section, and the third section, in accordance with a combination of a character string and numerical values specifying the ratios of the individual sections and described in a machining program.

A numerical control device comprising:

• rotation command output circuitry to output a rotation command to relatively rotate a workpiece and a tool;
• and
• feed command output circuitry to output a feed command to relatively move the workpiece and the tool,
• the feed command being able to include a vibration motion command to alternately repeat a forward motion and a backward motion,
• the vibration motion command including, in one vibration,
• a first section for travel at a first speed that is a travel speed during the forward motion,
• a second section for travel at a second speed that is a travel speed during the backward motion, and
• a third section for travel at a third speed that is a travel speed during the forward motion and is a speed lower than the first speed, wherein the numerical control device further comprises
• individual section ratio determination circuitry to determine ratios of the first section, the second section, and the third section in one vibration in the vibration motion command, and
• the section ratio determination circuitry determines the ratios of the first section, the second section, and the third section, on the basis of parameters representing the ratios of the first section, the second section, and the third section.

A numerical control device comprising:

• rotation command output circuitry to output a rotation command to relatively rotate a workpiece and a tool;
• and
• feed command output circuitry to output a feed command to relatively move the workpiece and the tool,
• the feed command being able to include a vibration motion command to alternately repeat a forward motion and a backward motion,
• the vibration motion command including, in one vibration,
• a first section for travel at a first speed that is a travel speed during the forward motion,
• a second section for travel at a second speed that is a travel speed during the backward motion, and
• a third section for travel at a third speed that is a travel speed during the forward motion and is a speed lower than the first speed, wherein
• the numerical control device comprises an individual section ratio determination circuitry to determine ratios of the first section, the second section, and the third section in one vibration in the vibration motion command, and wherein
• the individual section ratio determination circuitry determines the ratios of the first section, the second section, and the third section in one vibration in the vibration motion command, on the basis of load information indicating loads generated on the workpiece and the tool during a vibration motion.