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The impact test of the spring on the one hand is to test the performance of the spring to withstand the impact of the load, on the other hand can also stabilize the spring size, improve the spring load capacity, and eliminate defective. Usually a batch of springs is always sampled and the important ones can all be tested.
Impact tests can take two forms (Figures 7-30), one with horizontal impact (Figure 7-30a) and the other with vertical impact (Figure 7-30b). The horizontal impact test can be performed on a pendulum impact tester, and the vertical impact test can be performed on a drop hammer tester. 
For springs that require impact testing on an impact tester, the height and mass of the drop hammer and the number of impacts at each end of the spring should be specified on the drawing. If the energy of the drop hammer is greater than the energy absorbed by the spring, in order to prevent the spring from being damaged, a limit device must be installed.
After the impact test, the free height of the spring should be checked. Generally, it must not exceed 3% of the free height before the drop hammer. After the drop hammer test, no other treatment shall be performed.
For more details, please contact: Jinan Zhongchuang Industrial Test System Co., Ltd.
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How does China create an impact test for your spring?
Springs used in some construction machinery, buffers for transport vehicles, and recoilers for guns, etc., often have to withstand impact loads during their operation. Springs that are subjected to impact loads have very fast deformation speeds. For example, some high-speed guns can have recombiner springs with deformation speeds of up to 20 m/s. Under this high-speed deformation, the deformation and stress distribution of the spring are very uneven, especially when the deformation speed of the spring is higher than the allowable transmission speed of the stress in the spring, causing stress concentration, resulting in permanent deformation of the spring, even Breakage broken. Therefore, these springs should be subjected to impact tests.