| Abstrakt: |
A conical disc arranged in different stacks parallel, or series works as a compression spring used in different machine applications. This work focusing on presenting a comparison between theoretical calculation with experimental performance of single spring and their stacked. This comparison with cold stamping manufactured based on spring force and spring rate constant related with deflection. The spring design is chosen according to Belleville spring standard depending on sheet thickness of the selected material Carbon steel C55S-1/1204. Results experimental force for a single spring started high to about (0.2 mm) deflection, then reduced less than theoretical results, with a deviation (32.5 %). The parallel stacked of springs show, the force increased with increasing numbers of discs in spring stack, without clearly affecting deflection of stack in theoretical, but the experimental have (13.5%) variation for two springs and (14.6%) for three discs. While, the series stacked, show the spring deflection increased with increasing numbers of springs in the stack, without clearly affecting the spring force, with a variation of (38.5%) for two spring and (10%) for three discs. Finally, the spring rate increased with increasing deflection till reaching flatness, where the theoretical calculations show higher than the measured experimentally in about (31.5%). |
