Общий каталог Tungaloy 2020 - 2021 - страница 1636

Предыдущая страница Следующая страница

Навигация

Parts for ToolsTechnicalReference User’s Guide - Technical Reference Standard Cutting Conditions and Infeed Methods Threading guidelines Determine the infeed per pass and number of threads whilst referring to the table and description below. Pitch 0.5 0.75 1 1.25 1.5 1.75 2 2.5 3 3.5 4 4.5 5~ TPI 48 32 24 20 16 14 12 10 8 7 6 5.5 5~ No. of passes 4~6 4~7 4~8 5~9 6 ~ 10 7 ~ 12 7 ~ 12 8 ~ 14 10 ~ 16 11 ~ 18 11 ~ 18 11 ~ 19 12 ~ 24 Note: • When using the full-profile insert, set the total infeed amount by • The partial-profile insert or inside diameter insert has small nose taking the finish stock of 0.1mm into account. R. Reduce the infeed per pass and increase the no. of passes. • Set the first infeed to 150 ~ 200% of nose R and do not allow it to • Regarding standard infeed per passes and no. of passes, please exceed 0.5 mm. refer to our catalogue. • The infeed amount during the final pass must be a minimum of 0.05 mm. No zero cuts should be made. (Extra small infeed or zero cutting of work hardened surfaces will reduce tool life.) Infeed methods for threading tools Infeed method Features • Most simple and usual method Suitable for relatively small pitch threads of easily machinable material. • Chip contact length on right and left is longer, causing chattering, with increased load on the nose end. • When the half included angle is not symmetrical to the right and left, infeeding in the direction of 1/2 of the included angle will ensure equal machining with right and left Straight infeed (radial infeed) cutting edges. • Suitable for large pitch threads or easy to tear materials. Effectively prevents chattering. • Chips are discharged in one direction only. Satisfactory chip control. • Edge on the right (with zero infeed) tends to be worn heavily. Single edge infeed (flank infeed) • Suitable for large pitch threads or easy to tear materials. Effectively prevents chattering. • Chips are discharged in one direction only. Satisfactory chip control. • Edge on the right performs some cutting, therefore wear of this edge can thus be suppressed. Modified single-edge infeed (flank infeed) • Suitable for large pitch threads or easy to tear material. Effectively prevents chattering. • Chips are discharged alternately in right and left directions, resulting possibly in entanglement. • Right and left edges are used alternately, ensuring uniform wear and extending tool life. Alternating flank infeed L048 www.tungaloy.com