DEVICE FOR THERMAL SHAPING OF SINGLE-CORRUGATION BELLOWS Russian patent published in 2006 - IPC C21D9/08 

FIELD: technology of manufacture of bellows; devices for thermal shaping of geometric sizes and form of bellows.

SUBSTANCE: proposed device is used for thermal shaping of bellows due to difference in linear expansion of mandrel and bellows; device is provided with split rings fitted between covers engageable with them and tightened by strainer. End surfaces of upper and lower rings rest against each other; they have shape-forming external cylindrical surfaces with bore for internal corrugation of bellows and bevels on internal surface of upper ring and part of external surface of lower ring resting against bevels of supporting ring. Bevels are made in form of taper surfaces. External bevel of supporting ring is made at angle relative to axis of device which is lesser than or equal to limiting friction angle of materials of upper ring and supporting ring; internal bevel of supporting ring is made at angle relative to axis of device which is larger than limiting friction angle of materials of lower ring and supporting ring. Device may include several alternating supporting rings, upper and lower rings for simultaneous thermal shaping of several bellows in strut.

EFFECT: improved quality of single-corrugation bellows by magnitude of diameters; enhanced centering and axial alignments.

13 cl, 2 dwg