Manufacturing Process
Multi-leaf springs are made as follows:
- Shearing of flat bar
- Center hole punching / Drilling
- End Heating process forming (hot & cold process)
- Eye Forming / Wrapper Forming
- Diamond cutting / end trimming / width cutting / end tapering
- End punching / end grooving / end bending / end forging / eye grinding
- Center hole punching / Drilling / nibbing
- Heat Treatment
- Heating
- Camber forming
- Quenching
- Tempering
- Surface preparation
- Shot peening / stress peening
- Painting
- Eye bush preparation process
- Eye reaming / eye boring
- Bush insertion
- Bush reaming
- Assemble
- Presetting & load testing
- Paint touch-up
- Marking & packing
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