Luke4b
Automotive
- Jun 3, 2016
- 7
I've been working through the spline design example given in DIN5480-1 (120 x 3 x 38 x 9H 8f) but using the calculations given in Table 9 of 5480-15 I am struggling to match the measurement over balls values given in DIN5480-1 Fig6.
I'm assuming that values for e/s should be substituted for emin/max and smin/max to generate the upper and lower bounds.
Working through step by step for M1min:
Factor A = 1
inv a = 0.05375
Factor B = 0.054213 (external spline so s/d being smin(6.180/114))
invBETA = 0.086064
BETA = 5119.923 (V iterated to 89.3595)
M1 = 570.255
In the DIN5480-1 Fig 6, the distance should be 126.017, which makes a lot more sense on a 120mm diameter shaft!
edit:
Digging around a bit I've come across: This thread wherein the poster calculates these measurements using some different calculations in 5480-2 (which unfortunately I do not have). If there is a more simple method in 5480-2, what is the purpose in the method from 5480-15?
I'm assuming that values for e/s should be substituted for emin/max and smin/max to generate the upper and lower bounds.
Working through step by step for M1min:
Factor A = 1
inv a = 0.05375
Factor B = 0.054213 (external spline so s/d being smin(6.180/114))
invBETA = 0.086064
BETA = 5119.923 (V iterated to 89.3595)
M1 = 570.255
In the DIN5480-1 Fig 6, the distance should be 126.017, which makes a lot more sense on a 120mm diameter shaft!
edit:
Digging around a bit I've come across: This thread wherein the poster calculates these measurements using some different calculations in 5480-2 (which unfortunately I do not have). If there is a more simple method in 5480-2, what is the purpose in the method from 5480-15?