Forming method of double torsion spring and double seal ring

Forming method of double torsion spring and double seal ring
Generally, if the outer diameter is not very large, the two sealing rings are formed on the mandrel! It is relatively stable! The back sealing ring is pressed by a thread gauge knife, and then the left or right two oblique knives are used to make the rear sealing ring! If the outer diameter is small, the left and right lower oblique knives can be used as auxiliary cores