METHOD OF DRILLING OF DEEP HOLE IN DETAIL Russian patent published in 2015 - IPC B23B35/00 

FIELD: machine building.

SUBSTANCE: method comprises the installation of a detail in supports and drilling in it of a hole using the balance-beams. The used balance-beams are fastened on elastic suspensions and mounted on the detail at a half distance between each neighbouring pair of supports. A rigidity of the elastic suspension and mass of each used balance-beam are calculated from the condition of equality of rotation speed of the detail, determined depending on the pre-set modes of processing, and natural frequency of the balance-beam. Drilling is performed continuously for all over the depth of the processed hole of the detail.

EFFECT: deviation of the drill axis from the hole axis is decreased due to continuous compensation of non-uniform hardness of the detail during drilling, the quality of drilling of deep holes is improved.

2 tbl, 2 dwg, 1 ex