Общий каталог Tungaloy 2020 - 2021 - страница 1653

Solid Carbide Endmills B

Regrinding procedures o f solid carbide endmill

Check damage on cutting edge C

angle and end relief angle

z Regrinding of end relief angle Notice of regrinding G 1. For using cup type diamond wheel (1) If, after checking the damage of the cutting edge, the Relief angle damage is as case “A” or “B” of the fl ow chart, the tool must be reground. Use 400 to 600 mesh Too much damage of the cutting edge requires too much diamond wheel stock removal and thus reduces tool life. H

wheel β : peripheral relief angle Relief angle of small diameter cutters for aluminium

θ : spiral angle machining must be a large degree. I

(4) First check if “C” in fl ow chart can be adapted for the case of coated endmill or not. x Regrinding of peripheral rake angle If procedure “C” can be adapted for regrinding, tool life 1° ~ 3°1° ~ 3° after the grinding would be more improved than new one.

The reason is remaining coated layer of cutting edge and J

shorter tool length will keep much higher rigidity of the tool than before regrinding. (5) Please check run out of peripheral cutting edge, face Cup type diamond wheel cutting edge, with Vee block after regrinding. c Regrinding of end rake angle (End gash) The value of the run out must be controlled within 0.01 K mm. 30° ~ 45° For 2 fl utes endmill: straight type diamond wheel Notice for regrinding of ball nose endmill For * 3 fl utes endmill: cup type diamond wheel - Regrinding of relief angle only is available. The dimension of nose radius will be smaller after grinding. L 0° ~ 3° - Honing of cutting edge is necessary after regrinding. v Regrinding of end relief angle Cup type diamond wheel γ : 1st end relief angle: 5° ~ 7° M 2nd end relief angle: 15° ~ 20°

γ