No abstract

The accuracy of milling centre geometry is a basic condition for successful application in practice. Users of modern centres have to deal with the issue of measuring accuracy using in the production program. The desired results are achieved by careful preparation both before and during adjustment operations. These rules apply to all applications for new machines, but also to machines after collision or after handling older machines. The geometrical accuracy of the machine begins at the design stage, when the emphasis must be placed on the precision of production of parts and groups with the precise assembly of new machines. Even the best adjustment or alignment of the machine is not valid if the company orders a poor quality machine that does not meet the required characteristics both in design and quality. Such a poorly selected machine guarantees frequent interventions by technicians to ensure at least the minimum required tolerance.

The article is focused on the process of severe plastic deformation (SPD). New method using the SPD principle (DRECE) is described in the article. New method using the severe plastic deformation (DRECE) is particularly suitable for forming metal materials. Materials produced by this technology are characterized by increasing mechanical properties while maintaining sufficient ductility of the materials. In the practical part of the work, experiments were carried out on DC01 steel using the DRECE method. Sheet metal strips were formed through one to seven passes by DRECE method. The thickness of the formed strips was 2 mm, the strips width was 59 mm and the strips length were 1000 mm. The dimensions of the sheet metal strips were limited only by the design of the forming device using the method severe plastic deformation (DRECE). The experiment was performed on a forming tool with angle in the deformation material zone 108 °. The experiment was demonstrated on all sheet metal strips under the same forming conditions. The aim of the experiments was to verify the influence of the number of passes by the forming device on the achieved mechanical properties of the steel. The final part of the article describes the achieved mechanical properties of the sheet metal strip after forming by the DRECE method.