Naslov
Stabilization of a Milling Machine against Chatter

Autori
Gasparetto, A. ; Giovagnoni, M. ; Kuljanić, Elso ; Miani, F.

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
AMST '99 - Advanced Manufacturing Systems and Technology

Urednik/ci
Kuljanić, Elso

Izdavač
Springer

Grad
Udine

Godina
1999

Raspon stranica
445-452

ISBN
3-211-83148-7

Ključne riječi
Mode Coupling Chatter, Milling Machine, Stabilization

Sažetak
This work analyzes a phenomenon of self excited vibrations (mode coupling chatter) that was observed in a machine for wood cutting during the milling of a chair back. The configuration of the system for which chatter occurs is first illustrated. It is then recognized that the most crucial factor affecting the stability of the system is the angle gamma between the cutting force acting on the tool and one of the degrees of freedom of the structure. As a matter of fact, when gamma becomes smaller than a certain negative value, chatter occurs. An effective way to stabilize the milling machine is presented, consisting in changing the orientation of the tool with respect to the feed direction of the workpiece, so that the value of gamma is positive during the whole milling operation, and the instability zone is never entered. Tests carried out on the available milling machine proved the effectiveness of the stabilization. Finally, a theoretical framework is presented, which explains with more details how the stability of the system is affected by the value of gamma. Moreover, a simple stability condition which can be useful for practical stabilization purposes is also defined.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA