FIELD: machine building.
SUBSTANCE: invention relates to machine building. To increase spring resilient properties stability and reduced duration of production cycle cylindrical springs strengthening method comprises spring winding with pitch exceeding pitch of finished spring, heat treatment, penetrant inspection, ends polishing, wheel blasting, spring external and internal surfaces predeformation and cold working and along turns to each other contact line in single operation or separately.
EFFECT: invention can be used during helical compression springs hardening.
3 cl, 1 dwg
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