The original SCHNORR® disc springs
Today DIN 2093 divides three manufacturing methods depending on the relevant thickness:
The large dimensional range in which disc springs are made requires very different production methods.
- Group 1
t <1.25, punching, cold forming, rounding-off edges
- Group 2
1.25 ≤ t ≤ 6 mm, punching, cold forming, turning and rounding off edges or fine-blanking, cold forming and rounding off edges
- Group 3
From 6 mm, cold or hot forming, turning all sides, rounding off edges or punching, cold forming, turning and rounding off edges or fine-blanking, cold forming, rounding off edges
Disc springs of group 2 acc. to DIN 2093 can be manufactured acc. to the following alternative processes:
- First the blank is stamped and subsequently the inner and outer diameter are turned to finished size.
- The disc spring is fine-blanked* (according to VDI directive 2906 page 5) and the punching grooves and the burr at the cutting edges are subsequently removed by tumbling/ vibrofinishing.
SCHNORR® regard the group 2 turned version as the best for most applications; due to a high level of automation they can be continuously and competetively manufactured. Alternatively, we will offer group 2 disc springs in a fine-blanked version if it is more sensible to use them from a technical or efficient point of view.
Simply stamped and ground disc springs of group 2 do not correspond to DIN 2093 and generally do not comply with the quality requirements for a disc spring. Such products should only be used after a close technical examination and for simplest static applications.
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