CONTACT SPRING FORCING DEVICE Russian patent published in 2010 - IPC F16F1/06 B21F35/00 

FIELD: machine building.

SUBSTANCE: device includes upper and intermediate plates, punch holder attached to them and punch with lead-in and working parts. On punch there arranged is movable spring-loaded guide bushing to remove the forced spring from it. On lower plate there arranged is shell with annular insert for installation of the spring to be forced. Shell bore diametre is equal to outer diametre of compressed spring. Value of annular gap between shell bore and working part of the punch entering the spring is smaller than diametre of coil of the spring to be forced. On the punch after the working part there is stepped edge for transfer of axial force from the press through mating edge of guide bushing to the spring to be forced.

EFFECT: increasing contact and cyclic strength of springs per one stroke.

3 cl, 3 dwg