Abstract
The forming process of millimeter or submillimeter shell parts using incremental sheet metal forming technique was tested. The formability of aluminium, copper and stainless steel foils into quadrangular pyramid-shaped shell parts were examined. In this process the pinhole defects were formed in the steeper wall and thin workpiece. In order to prevent the defect, new tool path in which the local strain concentration is controlled was proposed. By this tool path the steeper wall was formed successfully.
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