TITLE:
Test and Evaluation of Stiffness of a Pin Turning Device for Large Marine Engine Crankshafts
AUTHORS:
Y. H. Choi, G. B. Ha, D. H. Kim, H. S. An
KEYWORDS:
Pin Turning Device (PTD); Machine Tool Stiffness; Compliance Response Function; Impact Hammer Test
JOURNAL NAME:
Journal of Power and Energy Engineering,
Vol.1 No.7,
November
28,
2013
ABSTRACT: In order to prevent unwanted excited
vibrations and to secure better machining precision in large size heavy duty machine
tools dynamic stiffness is one of the most desirable and critical properties.
In the past decades, many researches on machine tool stiffness test and
evaluation methodology have been made. However any methodology for a Pin Turning
Device (PTD), which is a special kind of turning lathe for machining big size
crankshaft pins, is rarely found among them. This study proposes a test and
evaluation process of stiffness of a PTD by measuring frequency response
function at the tool center point (TCP). For conformance proving for the
proposed methodology, stiffness of a PTD obtained by the proposed method with
impact hammer test (IHT) has been compared with that determined by FEM.