Cylinder head Spring platform and roughing for valve guide Objective: The previous solution with 3 tools should be reduced to 1 tool in order to save machining time. Achievements • 1 tool replacing 3 tools PATENTLÖSUNG P ENTED AT Flo PA TEN TE D Chip S tem CF w Sys Further, the removal of chips from the cylinder head should be ensured. • 65 seconds saved per cylinder head (800 hours/year) • Elimination of manual chip removal process Unimerco tool solution: CFS PCD stepdrill on solid carbide tool body with sandwich CFS m drill point. Syste Chip Flow Adjustable UM Dandia toolholder to ensure optimum runout. Unimerco tool no.: 210800/000003 Chip F FS C ystem low S Data • 15 000 rpm • 3 600 mm/min feedrate Result: The tool performs optimally and within all requirements in relation to diameter, roundness, positioning and surface finish. The cylinder head is free of chips, due to the patented ”Chip Flow System” (CFS), eliminating the subsequent manual chip removal process giving both quality and process time savings The machining time is dramatically reduced, as a result of the one shot solution. Using 1 tool instead of 3 eliminates 2 tool changes, 2x16 positionings, as well as 2x16 counterboring and reaming processes. • Tool life 300 000 holes • Tool costs = 0.07 euro/cylinder head CFS PCD step drill Grob twinspindle machining centre 40 bar internal coolant 10% emulsion Material : ALSi9Mg w w w. u n i m e r c o . c o m
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