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Plate Roll Embossing Process - The Efficient and Flexible Embossing of Sheet Metals

, , and . Proceedings of the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity, page 78--89. Cham, Springer Nature Switzerland, (2024)
DOI: 10.1007/978-3-031-40920-2_9

Abstract

Embossings on sheet metal surfaces allow a targeted enhancement of local part strength and affect thinning in deep drawing. However, conventional manufacturing of tailor embossed blanks on press machines with simultaneous intrusion of embossing punches results in high force demands and tool wear. Incremental forming of each indentation reduces the embossing forces required but increases cycle time. Embossing by rolling provides limited flexibility in embossing patterns. Therefore, presented paper deals with the development of a new approach for an efficient and flexible embossing of sheet metals -- the Plate Roll Embossing Process (PRE Process). Here, a modular design of an upper and lower tool is used, into which various embossing, counter punch or blank positioning inserts can be integrated. The sheet metal is placed between the tools and the setup is moved through a defined roll gap of a mill stand. The line contact between rolls and tool defines a relatively small forming zone, which is moved translationally through the workpiece by the rotation of the rolls. Numerical and experimental investigations were performed with aluminium AA6014 and steel DC01, showing homogenous embossing results with reduced loads compared to conventional embossing. Furthermore, the paper demonstrates that the high flexibility of the tool and process design enables embossing of flat workpieces as well as the simultaneous embossing and forming of curved parts. Finally, tensile tests performed with embossed specimens show that the PRE Process represents a fast and efficient sheet metal forming method for the targeted modification of component properties.

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