METHOD OF CYLINDRICAL SPRING RECOVERY AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2020 - IPC C21D9/02 

FIELD: repair production.

SUBSTANCE: invention relates to repair production and can be used in recovery of elasticity and initial geometry of helical coil springs working for compression. Method of restoring a cylindrical spring includes evaluating its state, stretching the spring until residual deformations occur with reaching the pitch of turns of not less than the pitch of making the factory spring, fixation of its initial factory geometry and hardening of spring turns by volume reduction. Device for recovery of cylindrical spring includes collapsible holder and core with spiral grooves made with pitch equal to pitch of manufacturing spring. At force action on the core the spring turns are compressed, strengthening the spring surface layer and restoring its initial geometry.

EFFECT: enabling spring elasticity recovery.

2 cl, 4 dwg