US 9,886,022 B2 · Numerical control device

Abstract

A numerical control device includes a phase-difference calculation unit that, when machining with vibrations is performed on a movement path, calculates a phase difference between a vibrational forward-moving position and a vibrational backward-moving position from a vibration amplitude-to-feed ratio between amplitude of the vibrations and a feed speed of a tool to a workpiece, a movement-path generation unit generating the vibrational forward-moving position and the vibrational backward-moving position as the movement path for each drive shaft by using the phase difference, a vibration-waveform generation unit generating a reference vibration waveform to be superimposed on the movement path for each drive shaft by using vibration conditions, a vibrational-movement-amount generation unit calculating a vibrational-movement amount on the movement path for each drive shaft by using the reference vibration waveform, and a movement-amount combining unit generating a combined movement amount for each drive shaft by adding the vibrational-movement amount to the movement path.

Claims8

Dependent claims

A numerical control device that performs machining on a workpiece while moving a tool and the workpiece relative to each other along a movement path with vibrations by drive shafts with which the tool or the workpiece is provided, the device comprising:

a phase-difference calculator comprising a processor that calculates, as a phase difference, a time lag in a vibrational backward-moving position relative to a vibrational forward-moving position generated based on a command block in a machining program from a ratio between an amplitude of the vibrations and a feed speed of the tool to the workpiece, the ratio being designated for the movement path;
a movement-path generator that generates the vibrational forward-moving position and the vibrational backward-moving position as the movement path for each of the drive shafts based on the phase difference;
a vibrational-movement-amount generator that calculates a vibrational-movement amount on the movement path for each of the drive shafts based on a reference vibration waveform to be superimposed on the movement path;
and
a movement-amount combiner that generates a combined movement amount for each of the drive shafts by adding the vibrational-movement amount to the movement path.

2 more elements

a movement-path generator comprising a processor that generates a vibrational forward-moving position, generated based on a command block in a machining program, and a vibrational backward-moving position, obtained by adding a phase difference designated for the movement path to the vibrational forward-moving position, as the movement path for each of the drive shafts;
a vibrational-movement-amount generator that calculates a vibrational-movement amount on the movement path for each of the drive shafts based on a reference vibration waveform to be superimposed on the movement path;
and
a movement-amount combiner that generates a combined movement amount for each of the drive shafts by adding the vibrational-movement amount to the movement path.

1 more element

Dependencies are inferred from the claim text.

Numerical control device

Life of this patent

Numerical control device

Life of this patent

Abstract

Claims8