In 1964 Kühn was appointed to a professorship at the , headquartered in the north-eastern part of the city. His actual teaching activity took place closer to the city centre, in the academy's "Fine Arts Institute" ("Institut für angewandte Kunst"), at the Monbijou Park. That year he headed up plans to build a new Institute for Metals Design ("Institut für Metallgestaltung") beside the studio-workshop in Berlin-Grünau. The project architect was . The institute was designed to operate both as a training facility for hands-on workers and to operate a structured programme of coursers for a newly "metal design department" at the which, naturally, was closely involved in the development. Over the next few years there were personal exhibitions in Berlin, Braunschweig, Chemnitz, Dortmund, Essen, Hannover and Zürich. Further afield, he took part on the Montreal World Fair, with a "walk-in sculpture" for the in the West German pavilion.