Каталог Tungaloy глубокое сверление 2 - страница 22

Machine setup STS and DTS Workpiece rotating system Tool rotating system Rotating Non-rotating workpiece Guide bush Guide bush workpiece Non-rotating Rotating tool tool Up to Up to 0.02 mm 0.02 mm - Only used when the workpiece and the tool axis are - Can be used when the workpiece and the tool axis on the same line. are not on the same line. - Better hole straightness and wear resistance on - Keep the alignment between guide bush and spindle guide bush are provided compared to the tool- within 0.02 mm. rotating system. - Keep the alignment between guide bush and spindle within 0.02 mm. DTS Positioning of outer tube and guide bush Workpiece Guide bush Be sure to set the outer tube more than 5.0 mm into the guide bush toproperly supply the coolant. Outer tube Positioning of workpiece material and guide bush Sealing is not required for DTS because of the vacuum effect, but keep the gap between workpiece material and guide bush within 1.0 mm. At least Up to 1.0 mm 5.0 mm Guide bush Tolerance Guide bush tolerance should be øD (mm) G6 tolerance (mm) G6 in order to keep consistenttool life and cutting accuracy.16.00 - 18.00+0.006 - +0.017 Diameters for G6 tolerance are 18.01 - 28.00 +0.007 - +0.020 shown on the right. Guide bush (Hardened steel or carbide) Material Guide bush material System Advantage Hardened steel Workpiece rotating Economical Carbide Tool rotating Long life of guide bush Workpiece rotating Coolant Temperature Filtration The proper coolant temperature is 30 - 40 °C The coolant must be filtered properly in order to (90 - 100 °F). protect guide pads and workpiece surface. If the temperature exceeds this range, the coolant Water-soluble type will deteriorate easily and may shorten tool life and generate poor surface finish. Around 10% (dilution rate 1/10) is recommended for the concentration of water-soluble coolant in order to protect guide pads. 22 www.tungaloy.com øD