A torsion spring, also known as a torsion coil spring, is an industrial helical spring made from spring steel. It generates torque or rotational force through elastic deformation. Its design principle is complex and its forms are diverse, involving theoretical systems such as spring stiffness calculation and stress distribution analysis, making it a type of spring with high theoretical requirements. The ends can be fixed to other components, and angular energy is stored and released by rotating a lever arm around the central axis of the spring. The direction of rotation is clockwise or counterclockwise depending on the application requirements.
The design parameters of this spring include control diameter, wire diameter, total number of coils, and end form. The torsional angle is limited by the tensile and shear strength of the material. The product uses a coil spacing design to reduce friction, and the ends can be machined into hook-shaped or straight torsion arms to adapt to different loads. Material selection includes stainless steel and alloy steel, and the manufacturing process requires heat treatment and surface treatment processes to improve performance. It is widely used in automotive, electronics, home appliances, and medical devices, specifically in door opening mechanisms, switch closing devices, and surgical instrument assist systems. Production equipment mainly includes digitally controlled computer-controlled spring coiling machines and heat treatment equipment.
