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A Comparison of Pin Actuation Schemes for Large-Scale Discrete Dies

2000; Elsevier BV; Volume: 2; Issue: 4 Linguagem: Inglês

10.1016/s1526-6125(00)70026-0

2212-4616

Yong‐Tai Im, Daniel F. Walczyk, Robert C. Schwarz, John M. Papazian,

Mechanical stress and fatigue analysis

Reconfigurable discrete die tooling is attractive for reducing the lead time, initial costs, and recurring costs associated with stretch forming of sheet metal parts such as aircraft body panels and wing skins as well as automotive and marine components. Current tooling for the stretch forming process requires substantial lead time for fabrication and is inflexible and expensive. To develop discrete die tooling for stretch forming, three different discrete die designs have been proposed, and small-scale prototypes of each have been built. In this paper, the three designs are compared to each other in terms of performance criteria, including pin positioning accuracy and repeatability, setting speed, suitability for a production environment, fabrication costs, manufacturability and maintainability, and maximum forming load capacity. The advantages and disadvantages of each design are also discussed.