MANUFACTURING METHOD OF HELICAL SPRING BY WINDING, AND SPRING-WINDING MACHINE Russian patent published in 2012 - IPC B21F35/00 B21F3/02 

FIELD: machine building.

SUBSTANCE: method involves supply of wire and its shaping by means of forming mechanism tools. The required nominal geometrical parameters of helical spring are specified. Actual position of the chosen element of helical spring structure relative to reference element is measured at least at one instant of time between beginning and end of helical spring production process in measurement zone that is located at final distance from forming mechanism as to length of helical spring. The above distance is shorter than total length of finished helical spring. The measured actual position of the structure element is compared by means of CNC programme to its nominal position for the specified instant of time in order to determine the current difference of positions, which represents difference between actual position and nominal position at instant of time when the measurement was made. Depending on difference of positions, control of tool (130) of step mechanism included in the forming mechanism is performed.

EFFECT: manufacture of a series of long helical springs with inconsiderable variation of total length.

15 cl, 6 dwg