Flanging shaping:
It is a stamping forming method that makes the sheet metal along a certain curve on the flat part or curved part of the forming blank
become a vertical edge, so that it becomes a flange-shaped part.
Key points of designing flanging shaping of stamping die:
Force calculation
1. Flanging force P=P=Lt Ltσ(NN)
L: Blanking contour length (mm) (mm)
t: Plate thickness (mm) (mm)
σ: Tensile strength (σ=350N/mm =350N/mm２)
Pressing force P1=0.15P(N)--Inner plate
Pressing force P2=0.2P(N)--Outer plate
2. Principles of selecting force source
The force source applies pressure to the pressing core to press the plate. There are generally three types of force sources: ①
Coil spring ②Polyurethane ③Nitrogen spring (expensive)
We generally choose coil springs. If the force is not enough, use nitrogen springs
3. Force source distribution principle
The force source distribution should be balanced and as close to the working part as possible.