feasibility study on the prediction of hole geometry on the thin wall tube during tube drawing process

Cold tube drawing has found extensive application in various industries. this study explores the feasibility on the prediction of hole geometry after cold drawing based on its initial geometry during the tube drawing process. to this end, the variation trend of the hole diameter was determined in the first series of the tests. in the second series, initial holes with specific geometries were converted into circular holes with predefined diameters. studies indicated that the developed procedure could create circular holes with a 6 to 12 mm diameter at acceptable accuracy for the tube diameter of 33 mm.