Non-standard tungsten-carbide movable punch die

* Tungsten carbide (WC-Co) insert – hardness up to HRA 90+, outperforms tool steel by 5-10× in abrasive wear, perfect for high-silicon and boron steels. * Movable punch design – allows axial float during multi-station forming, compensates for material variation and header timing deviations, reducing breakage. * Non-standard custom geometry – tailored to customer prints: any protrusion shape, shoulder angle, or stepped profile, with tight tolerances ±0.01 mm. * Optimized carbide-to-steel bond – diffusion-brazed or shrink-fitted interface eliminates detachment even under 200 t impact loads. * Precision-ground working surface (Ra ? 0.04 µm) – ensures smooth metal flow, prevents galling and sticking on the formed part. * Integrated cooling/lubrication channels – reduces frictional heat at high speeds (220+ spm), extends punch life and maintains dimensional stability. * Superior fracture toughness – specially selected carbide grade (e.g., 10-15% Co) balances hardness and toughness, resists chipping in interrupted cuts. * Quick-change shank design – compatible with most cold headers (National, Sakamura, Hyodong, etc.), reduces setup time by 30-40%. * Proven in multi-station forming of wheel bolts, heavy-duty fasteners – scrap rate <0.4% over 1M+ cycles, with minimal wear on carbide. * 100% non-destructive testing – each insert ultrasonic-inspected for internal voids; finished punch CMM-checked for full interchangeability.