GRINDING STONE UPPER SLIP DETECTION METHOD AND DEVICE

To provide a grinding stone upper slip detection method and device which can correctly detect the occurrence of upper slip of a grinding stone by using an AE signal being the vibration generated due to crushing of abrasive grains and a vitrified bond in grinding processing.SOLUTION: A grinding stone...

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Hauptverfasser: ISOGIMI SATOSHI, IWAMOTO KAZUYA
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a grinding stone upper slip detection method and device which can correctly detect the occurrence of upper slip of a grinding stone by using an AE signal being the vibration generated due to crushing of abrasive grains and a vitrified bond in grinding processing.SOLUTION: A grinding stone upper slip detection device comprises: a frequency analysis unit 50 which frequency-analyzes an AE signal SAE generated in the time of grinding to a grinding object material 12 from a grinding wheel 20; and an upper slip detection unit 56 which detects upper slip of the grinding wheel 20 on the basis of the magnitude of a periodical change amount synchronized with rotation of the grinding object material 12 of the signal intensity of a prescribed frequency band of the signal intensities of the frequency spectra that are frequency-analyzed by the frequency analysis unit 50. With this, the device can correctly detect the occurrence of upper slip of the grinding wheel 20 on the basis of the magnitude of the periodical change amount synchronized with rotation of the grinding object material 12 of the signal intensity SP of the prescribed frequency band obtained by frequency-analyzing the AE signal SAE.SELECTED DRAWING: Figure 1 【課題】研削加工中の砥粒やビトリファイドボンドの破砕に起因して発生する振動であるAE信号を用いて、研削砥石の上すべりの発生を正確に検出できる、研削砥石の上すべり検出方法および装置を提供する。【解決手段】研削ホイール20からの被削材12に対する研削時に発生するAE信号SAEを周波数解析する周波数解析部50と、周波数解析工程50により周波数解析された周波数スペクトルの信号強度のうちの所定周波数帯の信号強度の、被削材12の回転に同期する周期的変化量の大きさに基づいて研削ホイール20の上すべりを検出する上すべり検出部56とが、含まれている。これにより、AE信号SAEを周波数解析することにより得られた所定周波数帯の信号強度SPの被削材12の回転に同期する周期的変化量の大きさに基づいて、研削ホイール20の上すべりの発生を正確に検出できる。【選択図】図1