OEM No/Model: IV-42121640
1.material: SUP9
2.WidthxThicness: 100X22
3.the sizes: 1480/740
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)
a. Eye Forming / Wrapper Forming
b. Diamond cutting / end trimming / width cutting / end tapering
c. End punching / end grooving / end bending / end forging / eye grinding
d. Center hole punching / Drilling / nibbing
4.Heat Treatment
a. Heating
b. Camber forming
c. Quenching
d. Tempering
5.Surface preparation
a. sand blasting
b.Painting
6.Eye bush preparation process
a. Eye reaming / eye boring
b. Bush insertion
c. Bush reaming
7.Assemble
a. Presetting & load testing
b. Paint touch-up
c. Marking & packing
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