METHOD AND DEVICE FOR DRILLING

摘要

The invention relates to drilling with impregnated diamond drill bits where one automatically keeps the drill bit (30) cutting. The speed of the drilling device (3) along the feed device (2) is determined and the measured value is used for continuously controlling the feed cylinder (10) and the flushing medium pump (29) such that a substantially constant feed rate is achieved at the same time as the rotational speed of the drill bit (30) is kept within predetermined limits.