Modern Machine Shop

SEP 2017

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Page 91 of 220 September 2017 MMS 89 FEATURE project to generate synergies for this innovative project," explains Dr. Hans Jürgen Schlindwein, Rhenus Lub's head of R&D in coolants. "The company has been testing newly developed cool- ants in cooperation with the Research and Trans- fer Centre at the University of Applied Sciences Zwickau, which carries out sustainability tests in a production environment inspecting tools and workpieces for wear and machining quality. Rhenus Lub also works closely with the German Aerospace Centre (Deutschen Zentrum für Luft- und Raum- fahrt, DLR) on material and compatibility testing." The f irst fully developed products are the special coolants, Rhenus XY 190 FC and Rhenus X T 46 FC. The former is a water-soluble, fully synthetic formula, specifically designed for CFRP and glass fiber reinforced plastics (GFRP). The Rhenus XT 46 FC is a water-miscible coolant that c a n a l s o b e u s e d fo r c o m p o s i te o r s t a c ke d workpieces made of aluminum, titanium alloys and steel. According to Rhenus Lub, industrial tests show that using special coolants to machine CFRP and GFRP has a direct and positive impact on cut and hole quality, cost per hole, process costs and costs of waste, as well as on other key process expenses. Figure 1: Cutting data comparison with and without coolant. (Courtesy Rhenus Lub) Figure 2: Machining accuracy of CFRP drilling operations. (Courtesy Rhenus Lub)

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