Softening treatment of New Car sheet metal parts

In fact, it is to eliminate the residual stress caused by work hardening and production, so that it can restore its original plasticity, so we need to soften it. Generally speaking, according to the softening requirements, we can divide it into isothermal annealing, complete annealing, stress annealing, recrystallization annealing, etc.

1. The unfolding method of Fuel Car sheet metal parts should be suitable, and it should be convenient to save materials and processability.

2. New Car sheet metal parts should reasonably choose the gap and hemming method. The gap below T=2.0 is 0.2, and the gap between T=2-3 is 0.5. The hemming method uses the long side to wrap the short side (door panel type).

3. New Car sheet metal parts should reasonably consider the tolerance of the outer dimensions: negative difference goes to the bottom, positive difference goes half; hole size: positive difference goes to the bottom, negative difference goes half.

4. Burr direction.

5. Check the material, plate thickness, and plate thickness tolerance.

6. Draw the cross-sectional view for the position direction of tooth extraction, riveting, tearing, punching convex points (package), etc.

7. Places prone to error (similar asymmetry) should be highlighted.

8. For special angles, the inner radius of the bending angle (generally R=0.5) should be tried and unfolded.

9. Enlarged images should be added for places with more dimensions.

10. Places that need spray protection must be indicated.