Based on spring stress relaxation test data reliability determination method

Based on spring stress relaxation test data reliability determination method, the specific steps of 1) preparing the installation and test of the test apparatus; 2) determining the temperature of the test, the compression spring to carry out different test time stress relaxation test at different temperatures, collected bearing capacity and draw stress relaxation curve; 3) step 2) collected and bearing capacity test time, to compress the spring load loss rate ordinate, corresponding to the number of test time for the abscissa, are plotted at each test temperature a compression spring load loss and the time semilog curve; equation for stress relaxation of the spring and thus give a sample at the actual operating temperature, and calculates the load loss rate obtained at the end of life of the spring at the actual operating temperature and the sample remaining load; 4) reliability sample acquisition spring (8) end of life. The present invention effectively solves the reliability evaluation data compression spring discrete large, a long test time, poor accuracy evaluation data source issues.