Общий каталог Yamawa 2022 - 2023 - страница 272

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Spiral Fluted Taps (for blind hole)Spiral Fluted Taps(for through hole)Spiral Pointed Taps(for through hole)Hand TapsCementedCarbide TapsRoll TapsSpecial Thread TapsSimple Inspection ToolsPipe TapsThread MillsPremium Thread MillsDiesCenter DrillsCentering Tools JIS ② Spiral Fluted Tap Series for through hole Overall Thread Thread + Neck Shank Shank Size of Length oflengthlengthlengthlengthdia.squaresquareLℓℓnℓsDsKℓk JIS ① ZET-P Spiral Fluted Taps for Titanium Alloys, Through Hole Use (with LH Spiral Flutes) ② Specification Nitride ③ Recommended Tapping Speeds depending on Materials Titanium alloys チタン合金 5〜10 ④ (m/min) Product Features ●The tap is produced from a high grade powder high speed steel that is excellent in heat resistance and abrasion ⑤ resistance applications. ●A left hand spiral flute with a right hand screw thread helps prevent material shrinkage and the chips are pushed forward out of the hole to allow the cutting heat to be carried out. ● Appropriate flute shape for titanium alloy is utilized, and the discharge of chips is made smooth. ● A nitride surface treatment is performed for added wear resistance. ⑥ ● Considering the shrinkage of the internal screw thread, the tap is produced to a moderate oversize condition. Tapping Data Tapping Conditions [M6×1] Workpiece Material Ti-6Aℓ-4V ⑦ Bored Hole Size φ5.0 ZET-P Tapping Length 12mm Can Continue Tapping Speed 8m/min Machinery Type CNC tapping center General Purpose PO Tapping Fluid Water soluble cutting fluid 0 20 40 60 80 100 120 140 ⑧ （Number of holes processed.） Characteristics of titanium alloy ●It is mainly composed of titanium that has a high strength and is light weight. It has excellent heat resistance. There are ⑨ various kinds of titanium alloys such as Ti - 5Aℓ - 2.5Sn, Ti - 5Ta, and the most popular Ti - 6Aℓ - 4V which is commonly used due to its good characteristics. Examples of problems in tapping ⑩ ●Titanium alloys have high temperature strength and the thermal diffusion is small, soabrupt abrasion occurs on the tap. ●The spring back on internal screw threads may cause diameters to shrink and the tap may be crimped causing breakage. ●Chip welding occurs easily on the cutting chamfer of the tap and the threads flank surface. The finished threads surface of the internal screw thread also becomes rough and coarse. ⑪ JIS ②-19