Patent ID: 8123441
Filing Date: 2012-02-28
Classification: B23B,B24B,Y10T

Abstract:
1. A method for carrying out a deep hole and/or bottle-boring with a high ratio between a final linear depth and a diameter of the hole, through a solid workpiece, carried out by a tool covering a longitudinal distance with respect to the workpiece supported by a tool shaft of appropriate length, comprising the steps of: forming a first reference hole at a bottom end of the workpiece, opposite to an access end of the deep hole to be carried out, having an axis linked to the deep hole to be carried out by a predetermined spatial relationship; subsequent to the forming step, making a first deep hole of a diameter smaller than the deep hole to be carried out, so that said reference hole and said first deep hole are in spatial communication; and prearranging a guiding and supporting element internal to said first reference hole and connecting thereto at least one tool shaft and a related tool to obtain a contour internal to the deep hole and/or a deep hole having a diameter and an axis according to said predetermined spatial relationship, said guiding and supporting element forming a coaxial extension of said tool shaft; said first deep hole forming a further reference hole, a further guiding and supporting element being inserted inside the first deep hole at an opposite end of the workpiece, so as to support said tool shaft that passes through the further guiding and supporting element.