Manufacturing Methods and processes
Manufacturing Group Classification EN 16983 (DIN 2093)
In accordance with EN 16983 (DIN 2093), Disc Springs are classified into 3 groups:
Group 1 : material thickness t: < 1,25 mm
Group 2 : material thickness t: da 1,25 a 6,0 mm
Group 3 : material thickness t: da 4 a 16 mm
NB: disc springs with thikness from 4 to 6 mm are provided in Group 3 esecution
Special disc springs which are not contained in the DIN Standard may be to either Group 1, Group 2 or Group 3.
Dimension and Notation
Figure 1: Disc Springs of DIN 2093 Groups 1 and 2 without load bearing surface
Figure 2: Disc Springs of DIN 2093 Group 3 with load bearing surface
Disc Spring Materials
As a rule, spring steels with a Modulus of Elasticity = 206,000 N/mmi and with a Poisson's Ratio,u = 0.3 have been used in accordance with DIN 17221 and DIN 17 222. Plain carbon steels are only used for disc springs of Group 1 designation.
For special applications, a wide variety of other spring materials is available (see Section 12). These special materials will have markedly different mechanical properties in comparison to the standard disc spring steels.
DIN 2093 Manufacturing Procedures
Table 2
Special disc springs which are not included in the DIN 2093 Standard, and especially those disc springs which have been manufactured from non- standard disc spring materials, will generally be produced by procedures which differ from those given above.