Общий каталог Yamawa 2022 - 2023 - страница 186

Предыдущая страница Следующая страница

Навигация

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 ① Spiral Fluted Tap Series for blind hole Overall Chamfer+ Thread Thread + Neck Shank Shank Size of Length oflengthfull threadlengthlengthlengthdia.squaresquareLℓtℓℓnℓsDsKℓk JIS ① ZET-B Spiral Fluted Taps for Titanium Alloys ② Specification Nitride ③ Recommended Tapping Speeds depending on Materials Titanium alloys チタン合金 5〜10 ④ (m/min) Product Features ●T he tap is produced from a high grade powder high speed steel that is excellent for heat resistance and wear resistance. ●The cutting edge geometry helps prevent material shrinkage. The the spiral flute design helps pull the chips ou of the hole to allow the cutting heat to be carried out. ⑤ ●Appropriate flute shape for titanium alloy is utilized and the ejection of the chips is smooth. ●A nitride surface treatment is performed for added wear resistance. ●Considering the shrinkage of the internal screw thread, the tap is produced to a moderate oversize condition. ⑥ Tapping Data Tapping Conditions [M6×1] Work Piece Material Ti-6Aℓ-4V Bored Hole Size φ5.0 ZET-B Tapping Length 12mm ⑦ Tapping Speed 8m/min Can Continue Machiery Type CNC tapping center General PurposeSP Tapping Fluid Water soluble cutting fluid 0 20 40 60 80 100 （Number of holes processed) ⑧ 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 various types 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. ⑨ Examples of problems in tapping ●Titanium alloys have high temperature strength and the thermal diffusion is small, so abrupt 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. ⑩ ●Chip welding occurs easily on the cutting chamfer of the tap and the threads flank surface. The finished thread surface of the internal screw thread also becomes rough and coarse. ⑪ JIS ①-151