Wire springs are a general term for springs manufactured by plastically deforming wire material (bending, coiling, twisting, etc.). A wide variety of shapes exist, such as coil springs, torsion springs, extension springs, and shaped springs, each performing a specific function. The main manufacturing methods are cold coiling and bending, and after processing, heat treatment (quenching and tempering) is applied to impart the necessary elasticity and durability. Materials such as piano wire, stainless steel wire, and oil-tempered wire are widely used. They are indispensable functional components in a wide range of industrial fields, including automobiles, home appliances, precision equipment, and medical devices, where they store and release mechanical energy, absorb shock, position, and connect. Due to their high degree of design freedom, they can meet various required characteristics.