Apparatus and method for controlling the machining of...

B - Operations – Transporting – 23 – Q

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Details

B23Q 1/34 (2006.01) B23B 29/12 (2006.01) B23Q 11/00 (2006.01) B23Q 17/09 (2006.01)

Patent

CA 2641178

During the machining of workpieces, in particular dynamic loads act on the cutting tools in addition to the static loads. This leads to chipping at the cutting edges of the cutting elements and thus to the destruction of the cutting element with the possible consequence that the workpiece is damaged and thus becomes useless. Furthermore, bending and torsional forces act on the cutting tools, and these bending and torsional forces load the machine tool and cause a change in position of the cutting tool, thereby resulting in defective machining of the workpieces. Furthermore, vibrations and chatter phenomena impair the machining of the workpieces. It is therefore proposed according to the invention that piezoceramic transducers (22, 30) be arranged in the region of the cutting tools (3), where force components of the cutting force act on the transducers. The signals produced by the forces acting on the transducers are directed to the control device of the machine tool and the machining of the workpieces is controlled with regard to these signals.

Pendant l'usinage par enlèvement de copeaux de pièces, des charges dynamiques agissent sur les outils de coupe en plus des charges statiques. Il en résulte des débordements au niveau des arêtes de coupe des éléments de coupe et même une destruction de l'élément de coupe potentiellement suivi d'un endommagement de la pièce à usiner, ce qui la rend inutilisable. Des forces de flexion et de torsion agissent également sur les outils de coupe qui chargent la machine-outil et entraînent un changement de position de l'outil de coupe, suivi d'un façonnage défectueux de la pièce à usiner. Des oscillations et du broutage gênent en outre le façonnage de la pièce à usiner. Il es prévu selon l'invention que des convertisseurs piézocéramiques (22, 30) soient installés à proximité des outils de coupe (3), les composantes de force de la force de fraisage agissant sur les convertisseurs. Les signaux émis par les forces en action sur les convertisseurs sont transmis à l'unité de réglage de la machine-outil et le façonnage de la pièce à usiner est réglé en fonction de ces signaux.

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