Abstract
Reliability design is a developing domain of the science and technology. At present, the reliability engineering in spring manufacture is only on the stage of reliability testing and there are few documents concerning research in this field. After many years' reliability study, the author has deduced the reliability design formula for helical compression springs by the intervene theory of stress-strength distribution. This is the first time that the shot-peening and warm setting are introduced in the design parameters affecting the life of products. The author has also specified the relations between reliability and material strength of the products and the manufacturing process level. It will establish the basis of the system of spring reliability design theory.
