Experimental and numerical analysis of distortions after enamel coating process on oven catalytic side panel sheets

Abstract

Sheet metal materials are used in many sectors due to their good mechanical properties and weight/strength ratios. The use of sheet metal materials is common in household appliances and built-in ovens manufacturers. The final stage process in the manufacture of panels from sheet metal is usually coating. Sheet panels used in built-in ovens are usually enameled to be corrosion resistant and more hygienic. However, the heat treatment in the enamel coating process causes distortions in sheet metals. In this study, experimental and numerical investigations were carried out in order to minimize the distortions and thermal stresses that occur after the enamel coating on the oven side panel. The ANSYS 2020 R2 program was used for numerical analysis. The DC04EK cold rolled sheet in EN 10209 standard was used for the panel sheet used in the experiments. Panel sheets were produced as flat and formed, and enamel coated under the same conditions. The differences between the two sheets after the coating process were examined. The distortions and thermal stresses were smaller in the formed sheets. Maximum distortion was measured as 6.35 mm in flat sheet and 4.68 mm in formed sheet metal. The distortion in the formed sheet was approximately 25% less than the flat sheet. In numerical analysis, on the other hand, formed sheet distortion was 30% less than flat sheet. When the experimental results and numerical results are examined, it is seen that the forms given to the sheets minimize the distortions and stresses.