How to make leaf spring?

1.Shearing of flat bar

2.Center hole punching / Drilling

3.Heating process (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 / end rolling

4.Center hole punching / Drilling / nibbing

4.Heat Treatment

1.Heating

2.Hardening

3.Cambering

4.Quenching

5.Tempering

5.Surface preparation

1.Shot peening / stress peening

2.Primary painting

6.Eye bush preparation process

1.Eye reaming / eye boring

2.Bush insertion

3.Bush reaming

7.Assemble

1.Presetting & load testing

2.Finish painting

3.Marking & packing