Q: What causes SPCC stamping cracks?
A: Material too hard (e.g., 1/4 hard), excessive component content, insufficient die radius, insufficient lubrication; Solutions: Change to annealed material, optimize the die, increase lubrication.
Q: What to do if the coating peels off after SPCC bending?
A: Increase the bending radius, use a flexible coating, recoat after bending; for galvanized sheets, apply zinc or spray with zinc-rich paint.
Q: How to deal with rust on the cut edges of SPCC?
A: Passivate after cutting, apply rust-preventive oil or paint; clean slag and protect after laser cutting.
Q: What are the effects and solutions for yield plateaus in SPCC?
A: Stamping wrinkles/slip lines; Solutions: Select -S (annealed + leveled) material, or perform secondary leveling to eliminate the plateau.
Q: What are the selection criteria for SPCC and SPCD/SPCE? A: SPCC - General bending / simple stamping; SPCD - Medium stamping; SPCE - Deep drawing / complex forming, grade upgrades according to forming difficulty.