Manufacturing process of leaf springs

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

Hardening

Quenching

Tempering

Surface preparation

Shot peening / stress peening

Primary painting

Eye bush preparation process

Eye reaming / eye boring

Bush insertion

Bush reaming

Assemble

Presetting & load testing

Finish painting

Marking & packing

For more details of the swsher、spring、cotter pin and other metal products can consult HUILIDA METAL PRODUCTS CO.,LTD  http://chinahuilida.com/