Generalized mechanics and dynamics of metal cutting operations for unified simulations

This paper presents the unified modeling of mechanics and dynamics of metal cutting operations such as turning, boring, drilling and milling. The distribution of chip thickness along the cutting edges of tools are evaluated using the generalized geometric and kinematic model of the operations [1]. T...

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Bibliographic Details
Published in:International journal of machine tools & manufacture 2016-05, Vol.104, p.1-13
Main Authors: Kilic, Z.M., Altintas, Y.
Format: Article
Language:English
Subjects:
Boring
Cutting
Cutting parameters
Cutting tools
Drilling
Dynamics
Generalized model
Mathematical models
Metal cutting
Process simulation
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Summary:This paper presents the unified modeling of mechanics and dynamics of metal cutting operations such as turning, boring, drilling and milling. The distribution of chip thickness along the cutting edges of tools are evaluated using the generalized geometric and kinematic model of the operations [1]. The effect of relative vibrations between the cutting edge and workpiece segments are considered. The force contributed by each oblique cutting edge segment is evaluated from shear stress, shear angle and friction coefficient defined in orthogonal cutting data base. The tool cutting loads are evaluated by summing the differential cutting forces along all engaged cutting edges using the generalized geometric transformations presented in [1]. The chatter stability is solved in modal coordinate system, and the forced vibration marks left on the finish surface are predicted in discrete time domain. The process damping, multiple-regenerative phase delays which depend on the tool geometry and operations are considered. The application of the proposed unified mechanics and dynamics model is demonstrated experimentally in drilling, milling with indexable cutters and various end mills, and in opening large holes with multi-functional drilling/boring heads. •Cutting forces of any metal cutting operation with arbitrary tool are modelled.•Vibrations and stability of any metal cutting operation are modelled.•Semi-discretization method is used for the time domain simulations.•Both the integration scheme and interpolation of delay states are of fourth order.
ISSN:0890-6955
1879-2170
DOI:10.1016/j.ijmachtools.2016.01.006