Naslov
Cutting disturbances influenced by variations in contact surface geometry

Autori
Stoić, Antun ; Pusavec, Franci ; Kopač, Janez

Izvornik
Machining Science & Technology (1091-0344) 13 (2009), 4; 516-528

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
hard turning; disturbances; dynamic properties; depth of cut; radial force; vibration

Sažetak
The significance of cutting disturbances appearing in hard turning process case is shifting the process in dynamically very affected one. Therefore in this paper, as an objective, the turning process is evaluated by radial force variation analysis, as a function of depth of cut, tool nose radius and effective lead edge angle, through static and dynamic indicators. Tool/workpiece contact zone is in the case of hard turning, mostly limited within tool nose radius region. Therefore in this paper, geometry of the tool/workpiece contact line is analyzed. The depth of cut is calculated as a geometric difference of prior and instantaneous tool pass profile. The calculated values of the depth of cut are time dependant, and can vary by 60%. Various process monitoring techniques have been used to identify and confirm these variations as well as quantify the level of process stability. The obtained results confirm the assumption that effective lead edge angle and radial force are influenced by depth of cut, feed rate and tool nose radius. Additionally, it is shown that low values of depth of cut and prior pass machined surface valleys geometry are shifting the hard turning process on a dynamically more sensitive level if comparing to soft machining.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA