H4KH-12-C ng of the gear unit It is not necessary to consult Helical gear Reduction Box H4

Flender/Flender Gear Units/Helical gear Reduction Box H4

int height using cutter head setup device. In contrast to prole blades, no compensation of the cutting depth is necessary. The cutting edge geometries of stick blades are differentiated according to the number of prole surfaces to be reground: two-face grinding (2F) or three-face grinding (3F). Fig. 6.7 Geometry of stick blade. Ktop relief angle uhook angle inclination angle of the stick blade in the cutter head6.2 Cutting of Spiral Bevel Gears 2 Advantages of stick blades: high-performance tool due to the large number of stick blades in the cutter head compared with prole blades; large usable length for regrinding in the shank direction; exible design of the cutting edge geometry and technological angles; simple blade coating techniques; simple low-cost procurement of HSS or cemented carbide blanks for the blades; favorable geometry for the use of cemented carbide Disadvantages of stick blades: specialized blade grinding machines required; at least two functional surfaces need to be ground; high accuracy requirements for the stick blade geometry Special Features of Two-Face Grinding (2F) Only the two relief surfaces are ground when proling and regrinding; the front face has already been built along the usable stick length (see Fig. 6.. Thus, in conjunction with the inclination of the stick blade in the cutter head, the effective rake angle for the process is necessarily Fig. 6.8 Different stick blade versions: leftfor two-face grinding (2F) right for three-face grinding (3F) 1 front face, 2 side relief surface2 6 Manufacturing Process xed. Subsequently, this cannot be modied or optimized, but in return it is only necessary to coat the front face once. The relief surfaces of the primary and secondary cutting edges are not recoated after regrinding, and are exposed to increased wear. This 2F concept was designed for use with HSS stick blades. Because of typical crater wear, coating the front face resulted in signicant increase in tool life. This concept