DETACHABLE JUNCTION Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: junction has explosive bolt received in openings made in parts 7 and 8 to be joined. Housing 1 of the explosive bolt is made of a shape memory material and constructed as a rod with two threaded ends 2 and 3 and ring groove 4. Dummy axial openings 5 and 6 are made in housing 1. Explosive cartridge 10 is tightly mounted in opening 5 on spacer 11 and spring-loaded to the housing by nut 12. Nut 9 is spring-loaded to part 8 by way of coupling nut 13. Cross-piece 14 is defined by groove 4 and opening 6, has lesser strength than wall 15, and arranged in the plane of the butt of parts 7 and 8. Before assembling of the junction housing 1 is stretched, subjected to heat treatment up to memorizing of the shape obtained, and provided with ring groove 4. Before disassembling of the parts an electric signal is fed to explosive cartridge 10. As powder gases are burnt out the walls of housing 1 is heated up to the temperature of martensitic conversion. The housing remembers its shape which housing had before the stretching and breaks out cross-piece 14 resulting in dismounting parts 7 and 8. During dismounting shock loads decrease, and after dismounting the tightness of the explosive bolt is conserved. EFFECT: enhanced reliability. 1 dwg