Roll Texturing by Electrical Discharge Texturing Machines “EDT“ Latest Development for Lower Production Output

by "Mike Nitschke, Stefan Tschersche"

Publisher - WaldrichSiegen GmbH & Co. KG, Germany

Category - Engineering & IT

"Automobile manufacturers demand a certain surface roughness on the sheet in order to have smooth deep-drawing and painting operation. Deep-drawing requires a coarse structure whereby oil pockets are formed to prevent the metal sheet from ‘cold welding’ to the die shoe tool. Painting requires a fine structure to achieve a surface finish with a high quality; on the other hand lacquering requires a defined roughness to have an excellent cling to the sheet. In the beginning of the 1980s WaldrichSiegen developed and sold the first texturing machine. Despite attempts with exotic and experimental technologies like laser or electron beam texturing, EDT remains the only reliable and economic solution for industrial use till today. WaldrichSiegen has installed roughly 100 EDT machines since then. They produce roll surfaces with outstanding characteristics for high-quality flat products. The focus of any further development in recent years was on optimizing machines with a production output of up to 1100 rolls per month. The WaldrichSiegen ProfiTex 30/60 and ProfiTex 60S are market-leading machines in this segment. For a lower production output WaldrichSiegen has enhanced its product portfolio by a further machine type, the new ProfiTex M 200."

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