408 Каталог TUNGALOY 2007 Режущий инструмент Точение Фрезерование Сверление Стр.404

Каталог TUNGALOY 2007 Режущий инструмент Стр. 404 0408 ENG Lab2u

Solid Carbide Endmills Regrinding procedures of solid carbide endmill Check damage on cutting edge A Flank wear B Crater wear C Breakage at the peripheral cutting at the rake face Checking if the tool has edge enough length of cutting i Regrinding of peripheral Regrinding of peripheral Cutting off damaged part relief angle rake angle L J 1 Regrinding of end relief Grinding of end rake angle angle and end relief angle Regrinding of peripheral relief angle 1. for using cup type diamond wheel relief angle Use 400 to 600 mesh diamond wheel 2. for using straight type diamond wheel grinding wheel i Setting angle of grinding i a wheel Formular of setting angle a tan a tan p x tan 0 p peripheral relief angle 0 spiral angle Regrinding of peripheral rake angle Regrinding of end rake angle (End gash) For 2 flutes endmill straight type diamond wheel For 3 flutes endmill cup type diamond wheel Notice of regrinding (1) If after checking the damage of the cutting edge the damage is as case "A or "B of the flow chart the tool must be reground. Too much damage of the cutting edge requires too big stock removal and thus reduces tool life. (2) Please use diamond grinding wheel. (3) Peripheral relief angle must be ground between 18 and 10. Relief angle of small diameter and for aluminium machining endmill must be big degree. (4) First check if "C in flow chart can be adapted for the case of coated endmill or not. If procedure "C can be adapted for regrinding tool life after the grinding would be more improved than new one. The reason is still remaining of coated layer of cutting edge and shorter tool length will keep much higher rigidity of the tool than before regrinding. (5) Please check run out of peripheral cutting edge face cutting edge with Vee block after regrinding. The value of the run out must be controlled within 0.01 mm. Notice for regrinding of ball nose endmill - Regrinding of relief angle only is available. The dimension of nose radius will be smaller after grinding. - Honing of cutting edge is necessary after regrinding. Regrinding of end relief angle A i Cup type diamond wheel y 1st end relief angle 5 7 iK- 2nd end relief angle 15 20 H. i Y