Influence of the position of an aperture derived in the initial material on the drawing workability of the cold rolled metal sheets

In this paper, a research about the influence of the position of a previously derived hole in the initial material intended for drawing onto the drawing workability of the cold rolled metal sheets is made. This influence is researched by hydraulic drawing of round steel sheets with previously derived holes on them. The research was made by drilling equal holes in the center of the metal sheet plate and displaced from the center, but placed in the main directions of the normal planar anisotropy of the metal sheet. The goal is to proof that by changing the position of the previous derived holes the processing of the cold rolled sheets can be improved and that will help to solve technological problems in the production when the method of drawing pieces with previously derived holes in the initial material is used