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