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Influence of the Feedrate on Work Quality in Micro Rotary Swaging (2008)

Kuhfuß, B.; Moumi, E.:

3rd International Conference on Micromanufactur-ing (ICOMM 2008), September

9th - 11th, 2008, Carnegie Mellon/USA, Tagungs-band S. 86-91

Abstract

Since a couple of years microforming is the focus of many investigations, however the trend for more miniaturization goes on steadily, thereby two strategies are followed. Either new manufacturing methods are developed or well known methods in the macro scale are scaled down. The latter strategy is used in this project to model and adjust the rotary swaging process for microforming. Potential applications are found for example in medicine (endoscopic diagnosis and surgery) and the automotive industry (miniature pumps and valves). By modeling of micro rotary swaging many parameters have to be taken into account, those specific to the process and those specific to the material used. The relationships between these parameters have to be defined. For a general understanding of micro rotary swaging it is important to consider the complete system consisting of the process itself, the tools, the machine and the material. In this paper the relation between the nominal deformation degree and the actual value as well as between the wire diameter and the macrostructure are shown and some limitations to the process are determined. For this purpose wires from aluminum und steel with different diameters are contoured by infeed rotary swaging. The hardness profile and the tolerances of the parts are also investigated. The scientific findings after the experiments will be used to develop the swaging machine and the process further.