There are a variety of spring manufacturing processes, but its main forming inch: the main arts have two, cold forming and thermoforming.
In the spring cold forming process, the spring is mainly made of oil quenching and tempering materials, lead bath toughen heat treatment of spring wire, cold drawn wire, etc., the use of such materials to create the spring process generally do not need special heat treatment and only The need for stress relief annealing, spring design work stress and the performance of the material used. Spring cold forming process is generally suitable for smaller diameter, or shape more complex shaped spring, such as the diameter of less than 15mm, all kinds of cards, pull, torsion spring, convex, concave, curved spring. Cold forming process is characterized by: simple process, to avoid the heat treatment of the deformation, decarburization, etc. occurred.
In the spring thermoforming process, the spring is mainly made of hot-rolled materials, annealing materials, annealing materials, etc., the use of such materials to create the spring need to heat quenching and tempering heat treatment, spring design work stress and selected materials and heat treatment Process related. Spring thermoforming process is generally suitable for larger diameter, or relatively simple shape of the spring, such as the diameter of more than 6mm of the various cylindrical or conical spring. The thermoforming process is characterized by a greater value-added effect of the product and the ability to produce larger springs with larger wire diameters.