tornos DECO 7/10 - Page 127

OPTIONS & ALLIED TOOLING − DECO 7/10 − DECO 7a/10a − DECO 7e/10e
300236 en − 02/07 Chap. 16.4.3 /15
1. Calculations for C1 Speed [rpm]
fz x z x n
nC1 =
π x d
average
0.025 x 3 x 5000
nC1 = = 30 rpm
−1
π x 4.125
Note :
d
average
is calculated according to the diameter of bar and the minor
diameter of thread !
2. Conversion of [rpm] in [°/min]
Vf = nC1 x 360
Vf = 30 x 360 = 10800 °/min
3. Calculations for Whirling Attachment Inclination
Lead 0.6
tg α = = = 0.055 => α = 3.1685°
π x d
average
π x 3.45
Note :
d
average
is calculated according to the major and minor diameters of
thread !
With a dial gauge you can easily incline the attachment according to the
inclination angle as calculated. While Z3-axis is shifted the dial gauge
measures Distance h as calculated.
Example :
Movement in Z3: 40 mm, h = tg α x 40 = 0.055 x 40 = 2.214 mm
h
Z3
1514