Automotive Seat Frame Fine Blanking Die Project
Challenge
The client required a fine blanking die set for core seat recliner components. The part was a precision gear plate with extremely high tooth profile accuracy requirements (±0.02mm) and 100% clean shear surface. Die needed to maintain stable quality under high-speed stamping (60 SPM).
Solution
Used powder metallurgy HSS (ASP23) for critical die components with cryogenic treatment for enhanced wear resistance. Designed V-ring impingement structure for precise material flow control. Micron-level blanking clearance control (0.5% material thickness per side). Integrated online vision inspection system.
Result
Part tooth profile accuracy achieved ±0.01mm, surface roughness Ra≤0.8μm, 100% clean shear surface. Die life reached 3 million strokes, 50% above client expectations. Japanese client listed this project as their global fine blanking die standard.