Patent ID: 7210878
Filing Date: 2007-05-01
Classification: B23B,B28D,Y10T

Abstract:
1. A core drilling machine with an electrical motor ( 2 ) for rotational drive of a core drilling bit ( 3 ) having cutting edges oriented axial to a work piece ( 4 ), a feeding means ( 6 ) for generation of the feed of the core drill bit ( 3 ) against the work piece ( 4 ) and a controller ( 7 ) for controlling, relative to a first one-to-one control parameter, detected by a sensor ( 8 , 8 ′) for one of electrical power consumption (P) and torque (M), wherein a force sensor ( 9 , 9 ′) is connected to the controller ( 7 ) for detecting a contact pressing force (F N ) of the core drill bit ( 3 ) as the second control parameter; wherein the force sensor ( wherein the controller ( wherein the controller (