Accession Number : AD0671542

Title :   CHATTER BEHAVIOR OF HEAVY MACHINE TOOLS.

Descriptive Note : Quarterly technical rept. no. 8, 1 Oct-31 Dec 67,

Corporate Author : TECHNISCHE HOCHSCHULE AACHEN (WEST GERMANY) LABORATORIUM FUER WERKZEUGMASCHINEN UND BETRIEBSLEHRE

Personal Author(s) : Opitz,Herwart

Report Date : 31 JAN 1968

Pagination or Media Count : 67

Abstract : A digital computer program for a more exact stability analysis of the cutting process has been developed. By this method six degrees of freedom, the coupling between the vibration modes and the complex cutting stiffness are taken into account. The results of a stability analysis for two vertical milling machines by means of this program are compared to experimentally determined values. Chatter tests on another milling machine showed the important influence of the machine position upon the critical depth of cut. On the computation section programs have been completed, by which the calculation efforts for generating the input data can considerably be reduced. In addition to this methods have been developed to calculate natural frequencies, mode shapes and response loci. (Author)

Descriptors :   (*MACHINE TOOLS, VIBRATION), (*COMPUTER PROGRAMMING, CUTTING), MECHANICAL WAVES, DIGITAL COMPUTERS, STABILITY, MILLING MACHINES, RESONANT FREQUENCY, RESPONSE, MATRICES(MATHEMATICS), COMPUTER PROGRAMS, PERFORMANCE(ENGINEERING), CORRELATION TECHNIQUES, MODEL TESTS, WEST GERMANY, OSCILLATION, MECHANICAL PROPERTIES

Subject Categories : Computer Programming and Software
      Computer Hardware
      Machinery and Tools
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE