SPRING PRODUCTION METHOD Russian patent published in 1997 - IPC

FIELD: plastic metal working. SUBSTANCE: method comprises steps of selecting several fixed positions of one tool for forming diameter and pitch of spring and winding series of calibrating springs at different positions of other tool; determining relation of diameter and pitch of spring from location of each tool; dividing spring set according to drawing by parts with linearly changing diameter and constant pitch; according to received relation determining dependance between coordinates of both tools for initial and final points of each selected turn; according to common values of last dependances determining coordinates of tools in said points; at winding process moving tools from points with initial coordinate to points with final coordinate according to linear relations. EFFECT: enhanced efficiency. 3 cl, 10 dwg