Milling process damping calibration method based on operating modal analysis

• Main Authors: YANG YUN, WAN MIN, FENG JIA, MA YINGCHAO, ZHANG WEIHONG
• Format: Patent
• Language: Chinese; English
• Published: 10.10.2017
• Subjects: MEASURING; PHYSICS; TESTING; TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES; TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR

The invention discloses a milling process damping calibration method based on operating model analysis, and is used for solving the technical problem of poor practicability of an existing milling process damping calibration method. The technical scheme includes the following steps: first obtaining cutter-machine tool system model parameters; then carrying out a no-flutter-stable milling experiment, and measuring vibration signals in an upper position and a lower position in x and y directions of a milling cutter bar; and determining a power spectrum density matrix of the measured vibration signals at each frequency point, performing singular value decomposition on the matrix, then removing characteristic values corresponding to periodic cutting force, performing inverse Fourier transform on the corresponding larger characteristic values, and extracting an average damping coefficient on peak and valley values of an inverse transformation result. After the average damping coefficient is obtained, first cutting