Dynamic Characteristic Analysis of 120kg Spot Welding Robots under Movement

Abstract

The dynamic characteristics of spot welding robots SIA120 and HT120 were analyzed by the method of experimental modal analysis. The dynamic parameters of the robots in fixed postures and movement respectively were compared, the difference of the structural dynamic characteristics of the robots in movement and the stiffness were pointed out, and the reason causing the difference was put forward. It is suggested that the joint stiffness of the robots should be increased in the improvement design.