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The project/research was financed within the framework of the Lublin University of
Technology-Regional Excellence Initiative project and funded by the Polish Ministry of Science and
Higher Education (contract no. 030/RID/2018/19).
The aim of this paper is to analyse the effect of the selected geometric properties of
thin-walled structures on post-machining deformations. In the study, EN AW-7075 T651 and EN AW-
6082 T651 aluminium alloys were used to prepare specially designed thin-walled sample elements,
i.e., elements with walls arranged in a semi-open and closed structure and with a dimension of
165 × 262 × 50.8 mm consisting of bottom and vertical stiffening walls and so-called ribs with a
thickness of 1 mm. The measurements of the absolute deformations of the thin-walled bottom were
performed with the use of a Vista coordinate-measuring machine by Zeiss with a PH10 head by
Renishaw. Based on the obtained results, it was found that absolute deformation values were higher
for walls arranged in a semi-open structure. It is related to a lower rigidity of the tested structure
resulting from the lack of a stiffening wall, which is the so-called “rib”. Notwithstanding the geometry
of the elements, greater absolute deformation values were recorded following conventional cutting
methods. The use of high-speed cutting (HSC) provided positive outcomes in terms of minimising the
deformation of thin-walled elements. Additionally, it was found that higher absolute deformations
were obtained for EN AW-7075 T651 alloy.
