Quality evaluation of a single-layer steel cord using the simplified simulation method of the roller straightening process

摘要

This paper proposes an evaluation method of product quality from the numerical simulation of the roller straightening process using finite element analysis. A steel cord used for the reinforcement of automotive tires is a twisted structure of thin wires drawn from a steel rod. Various kinds have been developed to satisfy the required stiffness of a tire. Structural stability of steel cords is an important factor to evaluate the product quality. Engineers evaluate straightness and the residual torsion after the steel cord twisting process. Roller straightening devices are essential to improve straightness and residual torsion of steel cords by imposing the cyclic bending deformation. The process design of roller straightening devices has mostly been dependent on the trial-and-error method based on engineer's experiences. This requires tremendous time and costs. An efficient tool is necessary to reduce the wasted time and cost for designing the roller straightening process. A simulation method using finite element analysis (FEA) can be utilized as an alternative for the efficient design of the roller straightening process.