Practical test and FEA to evaluation of the thickness distribution for octagonal cup generated by deep drawing

Deep drawing is a Forming sheets metals technique that is frequently utilized due to its ability to generate a broad range of forms without flaws or Lamination that is too localized the study of the octagon shape is one of them. The procedure of the octagonal cup by cylindrical cup redrawing and the creation of an octagonal cup from drawing the blank were used to make an octagonal cup with the dimensions of (41.5 X 39.69 mm) and high (30mm). The purpose of this paper evaluation the thickness alteration behavior of deep drawing octagonal cups under the impact of different forming parameters such as die’s wall curve radius, speed of punch, the thickness of Blank, and type of metals. Numerical simulation was conducted using ANSYS Workbench 18.0 software used to carry out forming of octagonal cup. The results reveal the highest thinning thickness (11.626 %FEA, 10.072 %EXP) in the corner radius area of the cup with low carbon steel (t=0.7 mm) whereas growing in punch speed and a decrease in die wall curvature radius results in higher thinning. Furthermore, we conclude that the first method produces a superior octagonal cup with less thinning thickness than the second method. The results have shown that experimental and numerical work agree well, with the biggest difference being 5%.