Bearing diagnostic device for machine tool

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United States of America Patent

PATENT NO 9933333
SERIAL NO

15209817

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A bearing diagnostic device senses a failure in a bearing of a machine tool including a rotation shaft device. The bearing diagnostic device includes a rotation counting unit, a temperature measuring unit, a frictional torque calculating unit, a rolling speed calculating unit, a bearing characteristic calculating unit, a storage unit, and a determination unit. The frictional torque calculating unit is configured to calculate a frictional torque of the rotation shaft device. The rolling speed calculating unit is configured to calculate a rolling speed of the bearing from the count of rotations. The bearing characteristic calculating unit is configured to calculate a bearing characteristic from the frictional torque and the rolling speed. The determination unit is configured to compare the bearing characteristic calculated by the bearing characteristic calculating unit with a reference bearing characteristic stored in the storage unit to determine a presence of a failure.

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Patent Owner(s)

Patent OwnerAddress
OKUMA CORPORATION5-25-1 SHIMO-OGUCHI OGUCHI-CHO NIWA-GUN AICHI

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kawada, Naoki Niwa-Gun, JP 17 122
Koike, Issei Niwa-Gun, JP 4 10

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