13.10.2024
In the acoustic product tests, we noticed that InfiniSpring®-springs have very large plastic deformation capacity. The spring loads were above 200 kg before the steel rivets failed. Springs in the acoustic products are for loads up to 25 kg and InfiniSpring®-springs experienced very large plastic deformations in the tensile tests, but did not fail.
The acoustic product tensile tests with very large plastic deformations made us want to increase the loading speed and to see InfiniSpring® shock load performance. InfiniSpring® 3HS20 was chosen for the tests. It is cut out of a 3 mm thick sheet metal plate, weighting only 38 grams. This spring can carry loads up to 20 kg.
In the shock tests a chain is connected to the spring and on the other end of the chain there is a 9 kg mass. InfiniSpring® 3HS20 can carry the 9 kg static mass easily. In the shock test this mass is first lifted higher and then dropped in order to gain an impact force for the spring. Spring deforms due to this impact and reduces the impact force significantly. Tests and test results are shown in the video below:
InfiniSpring® 3HS20 tests and tests results concluded:
Test 1:
• Dropped mass is 9 kg
• Drop height is 1 meter
• The spring length increases 50 mm
• The spring absorbs 90 Joules of energy
Test 2:
• Dropped mass is 9 kg
• Drop height is 2 meters
• The spring length increases 110 mm
• The spring absorbs 170 Joules of energy
InfiniSpring® laser cut sheet metal steel springs are highly effective against shock loads. Shock loads need to be managed, for example in explosions and seismic events.
