FIELD: process engineering.
SUBSTANCE: invention relates to machine building and can be used in production of helical coil compression springs of steel. Proposed process comprises hardening of spring turn inner surface by surface cold-hardening. Along with the latter, crosswise flexure of spring turn is made in the pane perpendicular to spring axis. Surface cold-hardening is executed by hardening rolling by shaped rollers with working surface profiles made to allow the spring solid surface.
EFFECT: higher fatigue strength, longer life, lower noise, vibration and drawing force.
3 dwg
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