Design Methodology for Mechatronic Active Fixtures with Movable Clamps

Abstract

A new fixture layout design methodology for a novel concept of adaptive machining fixtures, with both actively controlled clamping forces and a dynamically adjustable layout, is proposed. The methodology aims at minimising the deflection of the workpiece due to the dynamic machining forces. The methodology is based on a finite element model of the workpiece, coupled with closed-loop controlled actuators, acting as adaptive clamps of the fixture. The methodology is applied on a theoretical test case of a thin plate workpiece. Results show a reduction by 84.2% of the maximum deflection of the workpiece compared to a traditional fixturing approach.