Spring_Two methods of winding spring

Two methods of spring winding:
The spring winding method is divided into two types: cold-rolling method and hot-rolling method. Cold-rolling method: the spring wire diameter d≤8mm is wound by cold-rolling method. Springs wound in cold state are usually cold-drawn and pre-heated. Carbon spring steel wire is generally no longer quenched after winding, and only needs to be tempered at low temperature to eliminate the internal stress during winding. Hot coiling method: Hot coiling method is used for springs with a larger reed diameter (d>8mm) Winding. Springs rolled in a hot state must be quenched and tempered at medium temperature after being rolled.
  All kinds of spring design process:
   Device space: To design a compression spring, you must clearly understand the space required for the device spring to effectively master the basic manufacturing conditions of a compression spring, such as outer diameter, inner diameter, and free length.
   Activity stroke load: The design of the compression spring must clearly understand the position to be actuated and the required elastic force. If the position is determined to understand the required elastic force, the material, wire diameter, and number of turns can be determined.
Environmental factors: Springs operating in different environments will be affected by environmental factors, which will affect their service life. Therefore, the designer must consider the changes in ambient temperature and humidity. Temperature has a huge impact on the life of the spring, and humidity is easy to cause The spring without surface treatment is oxidized. Therefore, environmental factors can determine whether the spring needs surface treatment and material selection.
   The distance between the two ends: The two ends of the tension spring will affect the form of the hook and the free length of the tension spring. The space can determine the size and outer diameter of the adhesion part.
   Pre-tensioning load: The pre-tensioning load determines the material and wire diameter of the spring, and the size of the adhesion part can be adjusted for the pre-tensioning length.
  The outer diameter of the mandrel: The inner diameter of the torsion spring is determined according to the size of the mandrel, but the change of the spring body after torsion needs to be considered, so a proper margin must be reserved.
  The inner diameter of the device space: If a torsion spring device adopts a recessed type, the recessed space needs to be considered. The space determines the outer diameter, free length, and number of turns of the spring body.
   Torsion fulcrum: There must be a point when the torsion spring is working, and this point can determine the length and form of the torsion bar.
  The starting and ending point of the action: the angular position of the torsion bar with the fulcrum when it is not doing work, and the length, form and angle of the torsion bar with the fulcrum can be clearly specified.