METHOD OF CUTTING METAL STRUCTURES BY EXTENDED CHARGES OF EXPLOSIVES Russian patent published in 1994 - IPC

FIELD: metal working. SUBSTANCE: linear cut is made at the surface of structure or plate of the same material. The plate has the same thickness as the structure being cut. The depth of cutting uniformly increases lengthwise from zero to maximum. Extended charge of explosive of preset mass per one meter of length is placed at the opposite surface of the plate or structure. The axis, or plane of symmetry of the charge and the line of maximum depth of the cut must rest in a plane perpendicular to the surface of the structure or plate being cut. The charge is initiated at the side of the smaller cut depth. Then the value of this depth in a section corresponding to the beginning of the cut is determined. A working linear cut of continuous depth is then made at the structure. The depth of this cut corresponds at least to the depth of the standard cut. A working charge of explosive similar in shape and position to the standard charge is placed at the opposite surface of the structure. EFFECT: enhanced cutting efficiency. 2 dwg