Structural Characteristic Analysis Of The SCARA Robot's Small Arm

The SCARA robot is widely utilized in the field of electronic,electrical household,precision machinery, and so on, for its small in size and simple principle. With the accretion of demand and progress of technique, the SCARA robot will be developed quickly. For the industrialization of our country's assembly robot as soon as possible, the full theoretical analysis and optimization to the SCARA robot's structure and capability is urgently needed for design and the production unit. So, study and apply the advanced method of analysis and calculation, solve the problem of optimization of the SCARA robot's structure, which is very important and valuable.This article's attention is concentrated on the small arm of the SCARA robot. Firstly, study the theories of elasticity and finite element analysis, which is the foundation of analysis the small arm's structure; Then, build a model of the small arm with the ANSYS software, and analysis the statics of its structure, study the distribution of stress and strain, analysis the intensity and rigidity, which provide a basis for the optimum design of structure; And then, the model analysis of small arm is carried on with the ANSYS software based on the theory of modal analysis, then the first five step natural frequency and vibration mode is to get.Finally,by using the optimization function of the ANSYS software ,the section dimensions of the small arm is optimized, thus the weight of the small arm is reduced.The computed result indicated that finite element model is reasonable, the result of the static state and the dynamic analysis is accurate, the effect of optimization is obvious, which provide a theoretically basis for the betterment and design of the SCARA robot.