論 文 (Original Article)
Change in Revolution Speeds
of Band Saw Wheels and Power Consumption during Sawing
MURATA Kohji, IKAMI Yuji and FUJIWARA Katsutoshi
Abstrast
It is said that the revolution speeds of band saw wheels change
during sawing by the load acting on the band saw. However, there are few quantitative data on
such change during sawing. In this
study, the revolution speeds of the band saw wheels were measured precisely
with rotary encoders, in order to examine the influence of sawing condition on
the change in revolution speed and the power consumption during sawing. The
revolution speeds of band saw wheels decreased along with the start of sawing,
and then it resumed closely to the idling revolution speed level. It increased immediately after sawing and
then it came down to the idling revolution speed level before sawing. The power consumption increased rapidly simultaneous
with the start of sawing and then it decreased gently. After sawing, the power consumption decreased
rapidly and then resumed the level for idling. The differences between the maximum and minimum revolution speeds of
band saw wheels during sawing increased with an increase in feed speed and also
with an increase in depth of workpiece.
Keywords: band saw, band saw wheel, revolution speed, power consumption,
change in revolution speed
挽き材中の帯鋸鋸車回転数と消費電力の変化
村田光司・伊神裕司・藤原勝敏
要旨
帯鋸盤の鋸車の回転数は、挽き材時に帯鋸に負荷がかかることにより変化するといわれている。しかし、挽き材時における帯鋸鋸車回転数の変化に関する研究はほとんどなされていない。本研究では、帯鋸鋸車回転数をロータリーエンコーダにより精密に測定し、挽き材中の帯鋸鋸車回転数の変化を検討した。また、帯鋸盤主軸モータの消費電力の変化についても検討を加えた。帯鋸鋸車回転数は、挽き材が開始されるとすぐに減少し、その後空転のレベルまで戻り、挽き材終了と同時に増加した後、空転のレベルに復帰した。帯鋸盤の主軸モータの消費電力は、挽き材開始と同時に急激に増加した後、緩やかに減少し、挽き材終了と同時に急激に減少して、空転のレベルに復帰した。帯鋸鋸車回転数の挽き材中の最大値と最小値の差は、送り速度の増加および挽き幅の増加に伴い増加した。
キーワード:帯鋸、帯鋸鋸車、回転数、消費電力、 回転数変化
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