Fine blanking process was first introduced & patented by Germany in 1923. This technology was initially used for office machine industry &clock industry.
 
It is refined technique of conventional stamping .A hybrid metal forming process combining the technology of stamping & cold extrusion . Triple action presses combined with special designed tooling produce parts impossible to make with any other stamping process.
 
Fine blanking is extremely precise high volume manufacturing process which gives almost 100% sheared edge & flat parts with cost effectiveness & repeatability .It can replace several secondary operations.
 
   
In the last century several parts have been considered for manufacturing under this technology such as engine parts , door latches , window regulators , gear box part ,compressor parts ,exhaust flanges etc.
 
 
Several advancements in the fine blanking technology has been done through CNC tool room machines, CNC presses & raw material developments thus
 
   
Working Principle  
 
   
Process Sequence  
The Complete Fineblanking Cycle :  
 
   
Conventional Stamping Fineblanking
  Production Method  
 
  • Single-action machine
  • material strip not firmly
  • clamped during the
  • blanking operation
 
     
  Features  
 
  • Sheared surface 1/3 s
  • sheared surface 2/3 s
  • Flatness Deflection of part
  • during the blanking
    operation
 
 
  • Tapered die-plate.
  • Difference in dimensions
    after to re-grinding
 
     
 
  • Conventionally stamped surface
 
     
     
 
  • Structure
 
  Production Method
  • Triple-action machine
  • FS = Shear Force
  • FR = Vee-ring indenter Force
  • FG = Counter Force
  • Material Strip is firmly Clamped during the blanking operation by V-
    ring indenter and Counter Force
   
  Features
 
  • Sheared Surface max 90% clean cut
  • Close dimensional
    tolerances
  • Maximum angular
    accuracy
  • Minimum die-roll opposite the burr side
  • Improved flatness
  • Cylindrical die-plate, thus no difference in dimensions caused by re-
    grinding.
  • Fineblanked surface
 
   
Seat Recliner for Cars Seat Recliner for Cars
   
   
Seat Recliner for Cars Gear Sector
   
Back Plate Rim
   
Rim Link
   
Misc. Components Sector & Gear starter idle
   
Webs Rim
   
Tongue Stamping for Seat Belts Valve Plates for Compressors