Gripflow Vs. Fineblanking

The Gripflow Process uses a conventional, single-action hydraulic press with CNC controls, which allows the ram speed to be controllable in the cutting area.  A stamping is blanked from the parent material accomplished by minimal clearance between the punch and die components. The material retention during stamping ensures high-repeatability from part to part and dimensional accuracy to specifications. The scrap material is allowed to flow laterally. Hence, the name “Gripflow.” Slugs from pierced holes are allowed to pass thru the compound punch eliminating the need to separate scrap from parts as is typically done in a Fineblanking operation.

The Fineblanking Process requires a special triple-action press and a “V” ring in the die to restrict the material from moving away from the shear zone during the blanking operation (opposite of Gripflow). This V-ring requires extra stock material and press tonnage (maximum of 40% of total blanking tonnage). Accuracies in most cases are similar to, or equal to, those of Gripflow.

Features:
  • Smooth-edge surfaces up to 100% shear
  • Minimal hole and position tolerance requirements at 0.025mm (0.001″)
  • Superior flatness at 0.025mm (.001″) per linear inch
  • Holes can be pierced close to part edges: Web of 50% of material thickness
  • Net part shape from a single-station or progressive die
Cost:
  • Gripflow™ tooling is less than fineblanking dies due to the elimination of the V-ring
  • Gripflow™ unit prices are typically less than fineblanking as a result of greater material utilization and tonnage efficiency
  • Gripflow™ tooling is significantly less than conventional stamping with progressive stations. These savings are a result of multiple operations performed in a single-station die
  • Gripflow™ unit prices can compete with conventional stamping if secondary operations are avoided
GFM Design Guide PDF Download
×