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Edward Kortes

Edward Kortes, M.S.

Lead Application Engineer
Arnold Fastening Systems Inc.

Edward Kortes is lead application engineer at Arnold Fastening Systems in Detroit. Prior to joining Arnold, Kortes was a joining engineer at the Böllhoff Group, another Detroit-area fastener manufacturer. He has bachelor’s and master’s degrees in mechanical engineering from Oakland University in Rochester, MI. While earning his master’s degree, Kortes served as a graduate research assistant at the university’s Fastening and Joining Research Institute, where he participated in fundamental and applied research to develop new technologies for fastening and joining metals, composites and polymers.

WORKSHOP #2 | Fastening & Joining: New & Alternative Methods
Flow-Drill Screws for Mixed-Material Assembly

Faced with the need to join aluminum to aluminum and aluminum to steel, automakers have been forced to find alternatives to the tried-and-true spot welding technology they had been using for decades to join all-steel assemblies. Flow-drill screws are one such alternative. A flow-drill, or friction-drilling, screw is a self-piercing and extruding fastener for joining layers of sheet metal. Combining the properties of friction drilling and thread forming, the screw acts as both a fastener and a drilling-and-tapping tool. It penetrates the layers, extrudes a short boss, forms its own threads, and applies clamping force between the sheets. This presentation will cover the advantages and limitations of this new fastening technology.

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