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Process Chains in Microforming Technology Using Scaling Effects (2011)

Kuhfuß, B.; Moumi, E.; Tracht, K.; Weikert, F.; Vollertsen, F.; Stephen, A.:

The 14th International ESAFORM Conference on Material Forming (ESAFORM 2011), 27th-29th April 2011, Belfast, AIP Conference Proceedings, 1353 (1) (2011) S. 535-540


Cold formed micro parts with dimensions 1 mm show in some aspects characteristcs due to scaling effects that can be positively used in process chains. Whereas aspect ratios in upsetting processes are limited to l0/d  in the macro scale, a laser induced free-forming process generates droplet shaped pre-forms for consecutive calibrating processes, i.e. micro rotary swaging. Scale effects on establishing and shortening of process chains like free-form heading/rotary swaging/heat treatment are discussed. On the other hand a geometric scale-up approach in the macro range is described to overcome the specific handling problems of miniature parts. This is achieved by leaving the parts in a physical linkage during the processing steps. An effective application of linked micro parts requires intensive modeling and simulation work.