MEASUREMENT OF CUTTER ABRASION DEGREE

PURPOSE:To make it possible to measure the abrasion degree of a cutter, by utilizing acoustic emission generating during the cutting of a workpiece. CONSTITUTION:A workpiece 1 is held to a lathe in a freely rotatable manner and a bite 3 is fixed to the tool post 2 opposed to the workpiece 1. Now, wh...

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Bibliographische Detailangaben
Hauptverfasser:	MIYAKE RIYOUICHI, YOSHIMURA KIYOKAZU
Format:	Patent
Sprache:	eng
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 INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MACHINE TOOLS MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OFPARTICULAR DETAILS OR COMPONENTS MEASURING METAL-WORKING NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PHYSICS TESTING TRANSPORTING
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Beschreibung
Zusammenfassung:	PURPOSE:To make it possible to measure the abrasion degree of a cutter, by utilizing acoustic emission generating during the cutting of a workpiece. CONSTITUTION:A workpiece 1 is held to a lathe in a freely rotatable manner and a bite 3 is fixed to the tool post 2 opposed to the workpiece 1. Now, when machining is performed to the workpiece 1 having a predetermined diameter in this state, acoustic emission (AE) is generated in the vicinity of the leading end of the cutter 3. This AE is detected by an AE sensor 5 and amplified to a predetermined level by a preamplifier 6 and, thereafter, a predetermined frequency component is taken out through a band pass filter BPF7. This frequency component is rectified by an absolute value circuit 8 and further converted to a DC signal (AE average value) by a low pass filter LPF9. The level of this DC signal corresponds to the abrasion degree of the cutter 3 and increases as the abrasion degree of said cutter 3 advances. The output of LPF9 is supplied to an indicator type display device 10 and a digital display device 12 through an A/D converter 11 and displayed by respective display systems.