Model for performance prediction in multi-axis machining

TL;DR

This paper introduces a predictive model for kinematical performance in 5-axis high-speed milling, enabling better trajectory planning and process optimization by identifying limiting axes and zones where feedrate is constrained.

Contribution

The paper presents a novel model that predicts the limiting axes in 5-axis milling based on joint space displacements, aiding in trajectory optimization and process planning.

Findings

Model accurately predicts limiting axes for given trajectories.

Zones with constrained feedrate are identified, aiding optimization.

Model demonstrated effectively through practical examples.

Abstract

This paper deals with a predictive model of kinematical performance in 5-axis milling within the context of High Speed Machining. Indeed, 5-axis high speed milling makes it possible to improve quality and productivity thanks to the degrees of freedom brought by the tool axis orientation. The tool axis orientation can be set efficiently in terms of productivity by considering kinematical constraints resulting from the set machine-tool/NC unit. Capacities of each axis as well as some NC unit functions can be expressed as limiting constraints. The proposed model relies on each axis displacement in the joint space of the machine-tool and predicts the most limiting axis for each trajectory segment. Thus, the calculation of the tool feedrate can be performed highlighting zones for which the programmed feedrate is not reached. This constitutes an indicator for trajectory optimization. The efficiency of the model is illustrated through examples. Finally, the model could be used for optimizing process planning.