BOHRVORRICHTUNG.

摘要

An apparatus for boring a hole, which affords communication between a first member (12) and a second member (18) connected to the first member (12), in the first member (12), comprises cutting means (20) having a rotary axis, first drive means (40) for shifting the cutting means (20) along a first axis extending in the direction orghogonal to the rotary axis, second drive means (54) for shifting the cutting means (20) along a second axis orghogonal to the rotary axis and first axis, third drive means (80) for rotating the cutting means about the rotary axis, detecting means (116, 118) for detecting a load acting on the cutting means (20) and control means (100, 102, 114, 116) for controlling the first and second drive means (40, 54) to correct the position of the cutting means (20) on the basis of a detecting signal provided from the detecting means (116, 118) so as to prevent an overload from acting on the cutting means (20).