7. Glossary
autofrettage ; autofrettage
The technique of applying an internal hydrostatic pressure in excess of the elastic limit at the bore to a single- or multi-block cylindrical tube or enclosure, causing plastic flow in an annular zone, in order to create a radial pressure between this zone and the elastically deformed zone which acts in a similar way to a shrink-fit pressure.
wedging ; wedging
The process used to create the clamping; it can be either press-fitting (to force the core into the shrink disc by means of a press), hot-fitting (to expand the shrink disc by heating in an oven, in a hot oil bath or by induction), or cold-fitting (to shrink the core to be shrunk by cooling with liquid air or liquid nitrogen), or even a combination of two of these processes.
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- Mechanical transmissions – Shrink-fitted assemblies on cylindrical seats – Function, realization, calculation. - NF E 22-621 - décembre 2015
- Mechanical transmissions – Shrink-fitted assemblies on tapered seats – Function, realization, calculation. - NF E 22-622 - décembre 1988
- Hooped assemblies – Assembly and disassembly by oil pressure. - PR FD E 22-623 -
- Hooped assemblies – Part 1: Design bases...
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CETIM (FR) – Study in progress on the deconcentration of shrink-fit stresses
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