ローラーヘミングにおける薄板鋼板の曲げ挙動の考察

抄録

This study presented the technical process of robotic roll hemming used in the automotive industry. The hemming process is widely used in automotive manufacturing to assemble outer and inner closure panels by folding the outer panel flanges over the edge of the inner panel. Hemming process using roller hemming, which differs from conventional press hemming, requires the selection of processing conditions that take into account the mechanism of each defect. Although the process of hemming is rapidly developing, there is a lack of relevant research on the subject. Considering that the effect of pre-bending is significant in the hemming process, we consider how plates are bent by roller hemming by machining using a straight mold with a simple geometry that is easy to compare with other conditions. The bending behavior of the plate is discussed based on the distribution of work hardening of the material, observation of the shape, contact points with the roller, and the distribution of strain and stress by FEM analysis.