Setting method of revolutions per minute on real time of spinning cutting tool, and control device

摘要

Disclosed is a setting method of revolutions per minute on a real time of a rotating cutting tool, and a control device, and more particularly, a vibration characteristic is consistently evaluated and analyzed when a cutting process is in progress to suppress and avoid suppression.

主权项

1. A method, comprising:
setting revolutions per minute in real time of a rotating cutting tool for use with a machine tool, the setting of revolutions comprising: while a cutting processing is performed on a workpiece by the rotating cutting tool, calculating a chatter threshold index Th value at a ratio of a chatter vibration size MFc to a cutting vibration size MFt, by Equation 1, wherein Equation 1 is Th=MFc/MFt, wherein Th=a chatter threshold index, MFc=a chatter vibration size, and MFt=a cutting vibration size; in a case in which the chatter threshold index Th reaches a set value of the chatter threshold index Th, determining the case as a symptom of abnormal chatter vibration; calculating a recommended revolutions per minute of the tool, wherein the recommended revolutions per minute of the tool is calculated by Equations 3 and 4, wherein Equation 3 is Ωj=60 ωn/j Nf, wherein Ωj=a recommended revolutions per minute, ωn=a chatter frequency, j=an integer, and Nf=a number of blades of the tool, and wherein Equation 4 is κ=60 ωn/Ωini Nf, wherein κ=a revolutions per minute optimization degree, ωn=a chatter frequency, Ωini=an initial or current applied revolutions per minute, and Nf=a number of blades of the tool; and adjusting the revolutions per minute of the rotating cutting tool to the recommended revolutions per minute of the rotating cutting tool in real time.