Method for manufacturing a leaf spring

Details Method for manufacturing a leaf spring Method for manufacturing a leaf spring

2007-10-23

2007-10-23

Cozart, Jermie E. (Department: 3726)

Metal working

Burnishing

By shot peening or blasting

C029S446000, C072S053000, C148S580000, C148S908000, C267S229000, C267S036100, C267S040000, C267S158000

Reexamination Certificate

active

10499015

ABSTRACT:
Leaf springs have improved durability in spite of using inexpensive spring steel such as SUP9 and SUP11 as materials. While a spring main body, made of the spring steel in which Brinell hardness is under 555 HBW and not less than 388 HBW (corresponding to a diameter of under 2.70 mm of hardness and not less than 3.10mm of hardness on a Brinell ball mark), is maintained at 150 to 400° C., the load is applied in the direction in which the spring main body is to be used, and the first shotpeening is performed at the plane where the tensile stress acts.

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patent: WO 00/75381 (2000-12-01), None

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