"Single Piercing And Drawing Tool For Manufacturing Of Sheet Metal Cup Washers Of Multiple Sizes."

Abstract: Single piercing and drawing tool for manufacturing of sheet metal cup-washers of multiple sizes. This tool is made up of four sub-assemblies, which are base block assembly (2), lower block assembly (5), upper block assembly (11) and top block assembly (15). To produce multiple sizes cup washers, multiple sets of lower block assembly (5) and upper block assembly (11) are to be used. Routed blank is placed between lower block assembly (5) and upper block assembly (11) of piercing and drawing tool on conventional fly press machine to form final size and shape cup washer (29) in a single step. The cup washers produced by this tool are meeting the design requirements with dimensional accuracy. This invention reduces number of separate tools required for cup washer production, ch~ngeover time of worn internal parts, production leadtime, shrinkage, wrinkles and distortions.

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