What kind of inclined coil spring is suitable for robot joint modules

The precision, volume, and performance requirements for the elastic components of the robot joint module are extremely demanding. The inclined coil spring adapted to the robot joint needs to have a compact design, axial stiffness, and excellent rebound performance. Select thin inclined coil springs with small cross-section and high number of turns, which can provide sufficient axial elasticity in limited space and meet the needs of joint micro displacement compensation. High strength materials such as high carbon alloy steel and nickel based alloys can ensure the long-term stable operation of springs under high-frequency vibration and impact load environments, preventing early fatigue damage. Robots operate frequently and at high speeds, requiring the inclined coil spring to have good dynamic response ability, be able to quickly recover deformation, and reduce accuracy loss caused by joint relaxation. Surface treatment should use electroplating or oxidation protection to improve corrosion resistance and adapt to various working environments.

The manufacturing tolerance of the spring must comply with international or industry standards to ensure a tight fit with the joint bearing after assembly and avoid gaps affecting the repeated positioning accuracy. The use of finite element simulation can verify the force distribution of the spring at various joint angles in advance, optimize the design parameters of the number of turns, wire diameter, and free height, and meet the application requirements of lightweight, compact, and highly reliable joint modules.