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2025
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02
Spring_ Answers to Common Questions about Spring Design
What is the characteristic curve of a spring? What is its relationship with the stiffness of the spring? What are the differences between the characteristic curves of constant stiffness springs and variable stiffness springs?
1. Question: What is the characteristic curve of a spring? How is it related to the stiffness of the spring? What are the differences between the characteristic curves of constant stiffness springs and variable stiffness springs?
Answer: The curve that represents the relationship between the load on the spring and its deformation is called the spring characteristic curve. The slope of this characteristic curve reflects the stiffness of the spring. The characteristic curve of a constant stiffness spring is a straight line, while the characteristic curve of a variable stiffness spring is a curve.
2 Question: What is the purpose of calculating the strength and stiffness of a spring? What are the main factors affecting the strength and stiffness of cylindrical helical compression (tension) springs?
Answer: The purpose of calculating the strength of a spring is to ensure that the spring does not undergo plastic deformation and fatigue failure during operation. The purpose of calculating the stiffness of a spring is to ensure that the spring has the required elasticity.
3 Question: Given that the external load on a cylindrical helical compression (tension) spring is F, analyze whether the deformation of the spring increases or decreases when only the diameter d of the spring wire, the number of effective coils n, and the mean diameter D are increased.
Answer: Under the action of F, when only d is increased, the deformation decreases; when only n is increased, the deformation increases; when only D is increased, the deformation increases.
4 Question: There are two cylindrical helical tension springs. If their materials, spring wire diameter, mean diameter, end structure, etc. are completely the same, but only the number of effective coils is different, analyze how their strength and stiffness differ.
Answer: The strength of the spring is independent of the number of effective coils n, while the stiffness of the spring is inversely proportional to the number of effective coils n.
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