Under what circumstances is it good to use a compression spring

Under what circumstances should a compression spring be used?
   (1) The design load cannot be achieved with round section materials.
   (2) Replace the round section compound spring.
   (3) When the spring with round material cannot reach the required deformation.
   (4) Where the spring installation space is small.
   (5) Where strict spring characteristics are required.
   Pressure spring design principles
  1. The selection of the allowable stress [τ] of the spring material should be based on ensuring the fatigue life of the spring. The dynamic life of springs is generally divided into three categories:
   Class I: The number of alternating loads is 106;
   Class Ⅱ: The number of alternating loads is 10~105;
   Class III: The number of times of bearing the alternating load is less than 10?;
  2. The material width-to-thickness ratio (a/b) should not be too large, and the winding of the spring should not be too small.
  3. When designing non-rectangular shaped cross-section springs, it is necessary to derive and draw curves or calculation formulas in different rotation ratios, different width to thickness ratios, deformation correction coefficients (τ) and shear stress correction coefficients (β).
  4. According to the given conditions and constraints, choose a design method that is simple to calculate and select reasonable parameters.