|
There are certain constraints, which have to be taken into account when designing components for manufacture by cold forming. The careful setting of design details may eliminate a press operation, or secondary process.The overview below should help you design the optimum shape at the outset.
| Solution available using forming techniques B
|
| |
R ≥ 0,2 |
| |
Non-fill
L » 0,05 x D |
| |
Centre
Ø d ≤ 0,3 x D |
| |
Non-fill
L1 » 0,1 x D
L2 » 0,05 x D |
| |
Ø d = D - (0,05 bis 0,1)
L = 0,5 to 1 x D
Diameters displaced with bore tolerance. |
| |
Under-fill or over-fill
L ≤0,1 x D
Ø d ≤ 0,3 x D |
| |
Undercut
L = 0,2 - 0,4
R = 0,2 - 0,4
α = 60° - 75° |
| |
α = 30° or 45°
Bottom of blind bore as punch form:
β = 10°; R = 0,2 to 0,5 |
| |
α = 30° or 45°
R = according to press results
B = edge break allowable |
| |
α = angle to release die;
Ø D may need secondary machinery depending on head size |
| |
cold form blend remaining |
| |
Pressed slot rounded with blend on the front edge |
| |
Only length-wise knurl possible with run-in |
| |
long thin bores cannot be pressed |
| |
All ribs, bosses, webs, cams and other special features rounded |
|
|
