Influence of Experiment Methods on Limit Hole Expansion Ratio

Juan LI, Hui WANG, Da-wei YAN


The objective of this paper is to investigate the influence of experiment methods on limit hole expansion ratio. The experimental material is 5754 aluminum alloy sheet metal with the size of 100 mm x 100mm. A hole with diameter of 10mm was made with different methods at the center of sheet metal. Results show that the method of processing hole has great influence on the limiting hole expansion ratio, hole by punching leads to minimum limit and hole by wire-cutting leads to maximum limit; for hole expanding of 5754 aluminum alloy sheet, using conical punch can get higher limiting hole expansion ratio than using cylindrical punch. With the increase of 5754 aluminum alloy sheet thickness, the limiting hole expansion ratio increases.


5754 aluminum alloy, Hole expansion, Limiting hole expansion ratio, Forming limit

Publication Date

2016-11-17 00:00:00


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