Dynamic Behavior of a Thin-Walled Cylindrical Workpiece During the Turning Process, Part 1: Cutting Process Simulation

Mehdi, Kamel; Rigal, Jean-François; Play, Daniel

doi:10.1115/1.1431260

Cited by 39 publications

(35 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As many workers [2,27,41], a cylindrical geometry of the workpiece is chosen. The BW represents the revolving part of the WTM system; it includes the holding fixture, the workpiece and the spindle (figures 3 a, b).…”

Section: Block Workpiece: Bwmentioning

confidence: 99%

New method to characterize a machining system: application in turning

et al. 2009

View full text Add to dashboard Cite

Many studies simulates the machining process by using a single degree of freedom spring-mass sytem to model the tool stiffness, or the workpiece stiffness, or the unit tool-workpiece stiffness in modelings 2D. Others impose the tool action, or use more or less complex modelings of the efforts applied by the tool taking account the tool geometry. Thus, all these models remain two-dimensional or sometimes partially three-dimensional. This paper aims at developing an experimental method allowing to determine accurately the real three-dimensional behaviour of a machining system (machine tool, cutting tool, tool-holder and associated system of force metrology six-component dynamometer). In the work-space model of machining, a new experimental procedure is implemented to determine the machining system elastic behaviour. An experimental study of machining system is presented. We propose a machining system static characterization. A decomposition in two distinct blocks of the system "Workpiece-Tool-Machine" is realized. The block Tool and the block Workpiece are studied and characterized separately by matrix stiffness and displacement (three translations and three rotations). The Castigliano's theory allows us to calculate the total stiffness matrix and the total displacement matrix. A stiffness center point and a plan of tool tip static displacement are presented in agreement with the turning machining dynamic model and especially during the self induced vibration. These results are necessary to have a good three-dimensional machining system dynamic characterization

show abstract

Section: Block Workpiece: Bwmentioning

confidence: 99%

New method to characterize a machining system: application in turning

et al. 2009

View full text Add to dashboard Cite

show abstract

“…In a work of Arnold, 1961 [9] an experimental study of steel tubular parts (gun cradles) reveals multiple zones subject to vibrations during turning. In 2002, Mehdi et al [10,11] have investigated aluminum tubular parts turning via numerical or analytical part modeling and experimental tests for various cutting conditions. In 2011, Lorong et al [12] have presented an experiment accompanied with full time domain simulations featuring strong chatter and bringing forward the impact of the damping on the instability onset.…”

Section: Introductionmentioning

confidence: 99%

Variable Compliance-related Aspects of Chatter in Turning Thin-walled Tubular Parts

et al. 2015

View full text Add to dashboard Cite

Thin tubular parts are often subject to turning process during manufacturing. The increasing compliance of the workpiece, which is associated to tool displacement and to matter removal, can give rise to chatter, leading to poor surface quality or premature machine/tool damage. The present work addresses an experimental case of turning a steel thin-walled tube featuring intense vibrations with variable parameters. Observations of transient records during the pass suggest a strong influence of the matter removal on the eigenfrequencies of the system, while the tool's motion implies strong variation of the modal projection of the cutting force. Another characteristic phenomenon is the intermittency of the vibrations and discontinuous chatter frequency evolution. These phenomena are reproduced and analyzed numerically. By means of a finite element modeling, the part's geometry variation during the pass is taken into account. Finally, a stability analysis is carried out for several states of this evolutive system in order to gather insight into the steady cutting conditions.

show abstract

“…The dynamic behaviour of thin-walled cylindrical components under turning operation was studied by Mehdi et al (2002a,b), containing two parts: simulation (Mehdi et al, 2002a) and experiments (Mehdi et al, 2002b). The simulation part took into account the damping due to rubbing between the tool flank and the machined workpiece surface, and defined the parameters governing the stability of the cutting process in the case of thin-walled workpieces.…”

Section: Introductionmentioning

confidence: 99%