engleski

Forming Processes in Manufacture of An Access Cover and Control of Position Tolerances

In this paper a sheet metal manufacturing process is presented with the combination of several metal forming technologies that are needed for the production of an access cover. Process consists of several stages: modelling (SolidWorks), NC programing (ToPs), punching, bending etc. This article is about the adoption of known engineering solutions CAD, CAM and CAPP into CIM. In order to avoid bending errors the correct calculation of punch penetration and the bend allowance has to be made. Bend¬ing parameters have to be right (straight bends, precise shapes, accurate angles) and punching distances calculated in regard to bending. Especially important for parts with holes or notches that have to be aligned perfectly after bending. This study illustrates prediction with acceptable accuracy of the bend allowance, springback angle, and punch stroke to obtain the desired final product dimensions. This is important for high quality production especially of assemblies with narrow tolerances where a perfect fit is required for installation of the part.

Sheet Metal; Bending; Punching; Modelling

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