METHOD OF METAL STRUCTURES EXPLOSIVE CUTTING Russian patent published in 2017 - IPC B26F3/00 B21D26/08 F42B1/00 F42D3/00 

FIELD: blasting.

SUBSTANCE: method includes the cutting in two stages. The first stage is the implementation of the weak cross-section cut structure in the form of the notch, the depth of which is not less than 1/6 of the cut structure thickness, by the single-point initiation of the elongated cumulative charge (ECC), which is mounted on its surface at the certain focal distance, which together with the cross-section area of ECC is selected depending on the cut structure. The second stage includes placing of elastic charge BB over the notch, which is closed by the strut, which is the shell with the bulk substance and density 1.7-1.8 g/cm³, the cross-section of which exceeds the elastic charge BB cross-section at least in 10 times. Provide the elastic charge BB blasting at simultaneous initiating from one of the end faces with counter-directed impulses perpendicular to the notch.

EFFECT: increased cutting efficiency of the thick metal structures, including those from alloy steels.

2 dwg