from the conferences organized by TANGER Ltd.
The contribution is focused on assessing the influence of ALPORAS aluminum foam porosity on dimensional precision of machined workpiece using electro-erosion wire cutting technology. The surface structure of material is formed by continuous nets of membrane material, pore volumes and cavities filled with gases residues after foaming. Due to the material structure cutting process is not continuous throughout whole material and electric discharge have to be initiated at the border of each pore in cutting line. This has an influence on the stability and accuracy. Deviations from the nominal dimension were measured, and for graphic representation the type A of standard uncertainty were calculated. From measured data the “barrel effect” can be determined. Barrel effect can cause the edge of a wire cut part to have a “bow” or “belly” shape.
Keywords: WEDM, aluminum foam, barrel effect, pore size© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.