Accession Number : AD0863626

Title :   Effect and Control of Chatter Vibration in Machine Tool Processes.

Descriptive Note : Final scientific rept. 1 May 66-31 Jul 68,

Corporate Author : TECHNISCHE HOCHSCHULE MUNICH (GERMANY F R) INST FUER FERTIGUNGSTECHNIK A

Personal Author(s) : Mueller, Karl G.

Report Date : 25 APR 1969

Pagination or Media Count : 159

Abstract : To determine the dynamic behaviour of gear drives under preload and under running conditions an electrohydraulic rotatory exciter was built and tested on a 18 stage milling machine gear box. Using this device the natural frequencies, dynamic flexibilities and the degree of damping for the drive are determined. Using a digital computer programme the values of natural frequencies and static flexibilities are also computed and the results of measurement and calculation are compared. To determine the dynamics of the cutting process an equipment consisting of a cutting force dynamometer, relative displacement pick up, electromagnetic exciter of high force capability, power supply to the exciter and an electronic device for the instantaneous measurement of transfer function were developed. The performance characteristics of this set up are presented. Besides these special problems, an examination was made as to how far a special method of description, computation and measurement ('Multiplex'-description) developed for the investigation of the stiffness and stability of machine tools will be suitable as a basis for the development of acceptability standards for machine tools and practicability of this method was confirmed. (Author)

Descriptors :   (*MACHINE TOOLS, DRIVES), (*DRIVES, VIBRATION), GEARS, MILLING MACHINES, DAMPING, DYNAMICS, RESONANT FREQUENCY, TRANSFER FUNCTIONS, CONTROL, VIBRATORS(MECHANICAL), WEST GERMANY.

Subject Categories : Machinery and Tools

Distribution Statement : APPROVED FOR PUBLIC RELEASE