How should the model designation of a compression spring be written so that it clearly describes its specifications and dimensions?
Ignoring material issues for now, a compression spring has four basic parameters: wire diameter, outer diameter (mean diameter, inner diameter), free length, and number of coils. These four parameters determine the basic dimensions and shape of the compression spring.
Therefore, the model designation with parameters is expressed as: wire diameter d × outer diameter D × free length L × total number of coils N
For example: 1.8×6.5×30×10; indicates that d is a wire diameter of 1.8mm, D is an outer diameter of 6.5mm, L is a free length of 30mm, and N is a total number of coils of 10.
More spring parameters require referring to relevant specification tables, which vary depending on the material.
An even simpler model designation is: D×L, for example: 12×30, indicating that D is an outer diameter of 12mm and L is a length of 30mm. The wire diameter and number of coils can be found in the corresponding specification tables.
Meanings of Common Parameters:
1. Diameter (D): Represents the maximum outer diameter of the spring.
2. Length (L): Represents the length of the spring when unloaded.
3. Wire Diameter (d): Represents the diameter of the spring steel wire, usually used to indicate the thickness of the spring.
4. Number of Coils (n): Represents the number of coils in the spring, i.e., the number of turns of the spring steel wire.
5. Elastic Modulus (E): Represents the elastic coefficient of the spring, i.e., the ratio of the spring's tensile deformation to the applied force.
6. Maximum Load (Fmax): Represents the maximum load the spring can withstand.
Important Notes:
1. When writing specifications, diameter should be listed first, followed by length.
2. When writing specifications with parameters, separate the parameters with the symbol "×".
3. When writing specifications for irregular springs, specify the value of each parameter and indicate the unit.
4. When converting a compression spring specification to a physical spring, select a suitable spring based on the values of each parameter.
