【Task】
A is a method and apparatus for adjusting the position of the cutting tool. In one embodiment, the perforations tool 20 includes a coupling member 45 which is driven by a CNC drilling machine, and a sliding tool holder 35 that is slidably coupled to the coupling member. Friction force is resistance to sliding movement of the cutting tool member 35. Frictional force between the tool step is sufficient to hold the position of the cutting tool. However, the friction force is to be used while adjusting the cutting tool, is insufficient to resist the lateral forces that are parallel to impart to the sliding direction. In another embodiment, the surface 1458,1458' of surface 1134 or friction member 1450,1450' of the sliding tool holder 1135,1135' is be curved in the shape corresponding to the desired curvature of the side wall of the hole 1184 1184a . During the work, follower 1457b in contact with the curved 1458,1458' is to slide the cutting tool holder in the transverse direction, during the work, defining the curved state of the hole side wall.
.FIELD 1