APPARATUS AND METHOD FOR DETERMINING THE RUNOUT OF A TOOL IN A MACHINE TOOL

A method and apparatus are described for determining the runout of a tool (12) retained by a rotatable spindle of a machine tool using a tool edge sensor, such as a non-contact tool setter (2), mounted to the machine tool. The spindle is arranged to rotate the tool, which may be a fluted cutting too...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	MERRIFIELD, Benjamin Jason, HOYLE, Samuel David
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOTDIRECTED TO A PARTICULAR RESULT DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g.ARRANGEMENTS FOR COPYING OR CONTROLLING MACHINE TOOLS MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PHYSICS TESTING TRANSPORTING
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Beschreibung
Zusammenfassung:	A method and apparatus are described for determining the runout of a tool (12) retained by a rotatable spindle of a machine tool using a tool edge sensor, such as a non-contact tool setter (2), mounted to the machine tool. The spindle is arranged to rotate the tool, which may be a fluted cutting tool, about a spindle centre line (20). The technique comprises rotating the spindle into three or more rotational orientations and using the tool edge sensor to measure a position of the edge of the tool (12) for each of the three or more rotational orientations. A tool centre point is found by fitting the positions of the tool edge to a function and a difference in position between the tool centre point and the spindle centre line (20) is used to determine a runout of the tool.