423 Каталог TUNGALOY 2007 Режущий инструмент Точение Фрезерование Сверление Стр.

Каталог TUNGALOY 2007 Режущий инструмент Стр. 0423 ENG Lab2u

Info Regrinding Procedures Regrinding method (applied to DSX) Before regrinding Check the cutting edge for damage and wear. If any large fracture is found remove it with a silicon carbide wheel. Use a 280 to 400 grit diamond cup-type wheel of 100 to 200 mm in diameter. (1) Grind the relief surface so that primary relief angle of 02 can be formed as shown in Fig. 1. After grinding the other side likewise do sparkout grinding so that the difference of the lip heights will be kept within 0.02 mm. (2) In the case of DSX type for steels Turn the drill by 04 and secure it there. Then grind secondary relief surface so that secondary relief angle of 03 can be formed while taking care to bring the ridge line formed between the primary and secondary relief surfaces to the drill center (values of 01 to 04 are shown in Table1). Table 1 Drill type 01 (Point angle) 02 (Primary relief angle) 3 (Secondary relief angle 04 (Rotating angle) DSX -20 -7 -10 -24 -26 5 (2) Thinning Use a 280 to 400 grit diamond straight-type wheel of 100 to 200 mm in diameter. Conduct thinning in the same manner as cross thinning (X-type). For DSX type drills take care to leave the part of secondary relief by 0.05 to 0.1 mm as shown in Fig. 2. Values of 31 to 33 written in the Figures are given in the Table 2. Table 2 Drill type 31 32 33 R DSX (Fig. 2) 140 145 38 42 108 112 - (1) Grinding the flank DSX type for steels Point angle Primary relief angle Fig. 1 Grinding relief angle