Patent ID: 9003661
Filing Date: 2015-04-14
Classification: B21D,B23D,F16D,F16F,Y10T

Abstract:
1. A production method for coned disc springs, comprising: preparing a sheet of material; punching plural ring-shaped blanks from the sheet of material by press forming, the blanks comprising a primary blank which has a larger outer diameter and has an inner area and comprising a secondary blank having a smaller outer diameter; and forming, by press forming, each of the blanks into a coned disc spring having a ring dish-shaped body, the coned disc springs formed from the blanks being coaxially installed into an apparatus, and the body of the coned disc spring comprising a convex surface and a concave surface, the convex surface including an outer edge and an inner peripheral portion with an inner edge, the concave surface including an inner edge and an outer peripheral portion with an outer edge, wherein the secondary blank is punched from the inner area of the primary blank