CUTTING ABNORMALITY DETECTING AND EMERGENCY RETURNING METHOD IN GEAR WORKING MACHINE

PURPOSE:To prevent destructing of a tool and damaging of a machine and a workpiece gear due to abnormal cutting while improving reliability of detecting abnormally cutting the tool. CONSTITUTION:A rotational frequency detecting gear 8 and an electromagnetic or photoelectric detecting device 9 are pr...

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Bibliographic Details
Main Author NANBA MITSUO
Format Patent
LanguageEnglish
Published 04.04.1995
Edition6
Subjects
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
MAKING GEARS OR TOOTHED RACKS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
TRANSPORTING
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Summary:PURPOSE:To prevent destructing of a tool and damaging of a machine and a workpiece gear due to abnormal cutting while improving reliability of detecting abnormally cutting the tool. CONSTITUTION:A rotational frequency detecting gear 8 and an electromagnetic or photoelectric detecting device 9 are provided in a tool drive shaft 2, and a rotational frequency at normal cutting time is as stored in a memory unit 11, to measure fluctuating a rotational frequency at cutting time compared with the rotational speed at the normal cutting time and judged in an arithmetic device 12. In the case of exceeding a preset limit value, after a control unit 13 is actuated to stop an axial feed of a tool supporting base 4, a radial feed is actuated so as to separate a little a tool 1 from a workpiece gear 2, and a tool shaft dividing motor is stopped.
Bibliography:Application Number: JP19930237627