Abstract
In order to investigate the wear behavior of the tools in micro forming, micro deep drawing with a punch diameter of 1 mm was performed. The stainless steel (German standard 1.4301) with a thickness of 0.025 mm was used as blank material. The forming tools are made of tool steel (German standard 1.2379). The mineral oil HBO 947/11 was used as lubricant. Two different failures resulting from tool wear were observed in this investigation. The experimentally measured punch forces show no relation between the change of the maximum punch force and the wear of micro deep drawing tools. Furthermore, the surface of the micro deep drawing tools was investigated using a confocal microscope. It was found that the surface quality of the used die changes clearly with the number of experiments. Moreover, the EDX analysis shows clearly that elements from the blank material exist on the surface of the die. This indicates an adhesive wear in micro deep drawing.
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