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2007
Conference Paper
Titel
IntiBo - Intelligent adaptronic drilling tool
Abstract
Drilling tools with great cantilever are used for the purpose of deep drilling. Vibrations of the drilling tool caused by changing cutting forces, based on form and position errors of a pilot hole, affects the drilling quality. Within the project IntiBo fundamental mechatronic and control insights on the integration of adaptronic components are being developed by the Fraunhofer IPT exemplified by a drilling tool. Such components contribute to the fact that the vibrations of the tool and machine structure are compensated, as well as form and position errors in the work piece are minimized. The construction of drilling tool enables the use of different adaptronic positioning systems. An integrated sensor actor system in the top of the drilling tool guarantee a highly dynamic radial drooping of the cutting edge. The surface of the drilling hole can thereby be structured with a maximum drooping frequency of several hundred hertz or a maximum stroke of 130 urn. Form and position errors of the work piece are compensated by three radially adjustable guiding pads, which are positioned with an offset of 120 on the circumference of the drilling tool. A third positioning system at the drilling tool body is used for active vibration damping of the tool structure. Based on an intelligent combination of different sensor actor systems, the precision of the machine tool can be clearly improved in relation to surface quality and geometrical accuracy of the work piece. New control loops for multi variable adaptronic systems, as they are developed within the project IntiBo, are essential for this purpose.
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