Каталог Tungaloy зубофрезерование - страница 29

BASIC RACK PROFILES OF GEAR GENERATING TOOLS

Definition of basic rack profiles acc. to DIN 3972

Basic Rack Profile I / For finishing Basic Rack Profile II / For finishing

h = 1,167 x m haP0 = 1,250 x m

aP0 h = 2,167 x m hP = 2,250 x m P

h = 2,367 x m hP0 = 2,450 x m

P0

r ~ 0,2 x m r ~ 0,2 x m

aP0 aP0 r ~ 0,2 x m

r ~ 0,2 x m fP0

fP0 P

P SP0 = x m

S = x m 2

P0 2

Basic Rack Profile III / Preshaping for grinding or shaving Basic Rack Profile IV / Preshaping for finishing

3 3 haP0 = 1,25 x m + 0,25 m haP0 = 1,25 x m + 0,60 m hP = 2,250 x m hP = 2,250 x m hP0 = 2,450 x m hP0 = 2,450 x m

r ~ 0,2 x m r ~ 0,2 x m

aP0 aP0

r ~ 0,2 x m r ~ 0,2 x m

fP0 fP0 P P

SP0 = x m SP0 = x m

2 2 3 3 q = 0,25 m x SIN20° q = 0,6 m x SIN20°

Description of symbols Finishing with hob Outer ring module 10, z = 94 material: 42CrMo4 haP0 = addendum D = 300 mm h = tooth depth = cutting depth n = 148 min-1 [rpm] P fa = 4 mm/WU [mm/rev.]

hP0 = tooth depth of the basic rack profile ae = 22,5 mm

SP0 = tooth thickness r = tip radius aP0 r = root radius fP0

Roughing with hob Spur gear module 12, z = 45 material: 18CrMo6 D = 270 mm n = 140 min-1 [rpm] fa = 3 mm/WU [mm/rev.] ae =28 mm