This article metal forming analysis pdf free download multiple issues. This could be a single stage operation where every stroke of the press produces the desired form on the sheet metal part, or could occur through a series of stages. Stamping is usually done on cold metal sheet.
Stamped parts were used for mass-produced bicycles in the 1880s. Stamping replaced die forging and machining, resulting in greatly reduced cost. Although not as strong as die forged parts, they were of good enough quality. Stamped bicycle parts were being imported into the United States from Germany in 1890.
Through research and development Western Wheel was able to stamp most bicycle parts. Several automobile manufacturers adopted stamped parts before Ford Motor Company. Ford was forced to use stampings. Flanging – the material is bent along a curved line.
Used primarily for adding decorative patterns. Traditionally used to make coins. Stretching – the surface area of a blank is increased by tension, with no inward movement of the blank edge. Often used to make smooth auto body parts. Used for beverage cans and ammunition cartridge cases. Necking – used to gradually reduce the diameter of the open end of a vessel or tube.