Leaf Spring - Manufacturing Process

Manufacturing Process

Multi-leaf springs are made as follows:

  1. Shearing of flat bar
  2. Center hole punching / Drilling
  3. End Heating process forming (hot & cold process)
    1. Eye Forming / Wrapper Forming
    2. Diamond cutting / end trimming / width cutting / end tapering
    3. End punching / end grooving / end bending / end forging / eye grinding
    4. Center hole punching / Drilling / nibbing
  4. Heat Treatment
    1. Heating
    2. Camber forming
    3. Quenching
    4. Tempering
  5. Surface preparation
    1. Shot peening / stress peening
    2. Painting
  6. Eye bush preparation process
    1. Eye reaming / eye boring
    2. Bush insertion
    3. Bush reaming
  7. Assemble
    1. Presetting & load testing
    2. Paint touch-up
    3. Marking & packing

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