Tool for forming crimp joints

摘要: One jaw of a tool actuated by compressed air for joining together two overlapping sheets metal carries hollow cupshaped die with rim to abut the outer surface one and second novel punch which abuts other sheet. The is cylindrical in configuration, has end tapered means curved surfaces disposed at acute angles relative axis cylinder converging toward each form an arcuately cutting edge opposing ends define pair points that coincide punch. forces through into die, piercing forming tongues on respectively extend away from are nested interlocking engagement.