Abstract
In interference fit assembly, the magnitude and deviation of the assemble force are large so that it is hard to reach high accuracy of position for components of multiple parts stacked up. A force/stiffness compensation method is proposed to control the positioning accuracy in the interference fit assembly for multi-peg-hole components. Based on the force and displacement information measured in the assembly process, the position errors are acquired, and the stiffness of the assembly system under the exerted assemble force is calculated. According to the stiffness, the deviation from the target position is calculated and compensated. An experimental equipment based on this method was developed. As an example, assembly of rings, 6.2 mm in diameter and 0.25 mm in thickness, was carried out to demonstrate the feasibility of the proposed method. The assembly results show that high positioning accuracy of the assembled rings can be achieved with a large variation of assembly force. The presented method provides a simple, feasible, and efficient solution for interference fit assembly for multi-peg-hole components.
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