Method of Shot Peening Coil
Author: Champaigne
Source: US Patent 7,984,537 B2
Doc ID: 2011133
Year of Publication: 2011
Abstract:
Both the inner and outer circumferential surfaces of a coil
spring are peened by passing sequential segments of the
spring around offset pulleys mounted within a peening cabinet.
As the spring is pulled around one of the pulleys, the coils
fan out from the pulley to permit the peening media to impact
portions of the inner and outer circumferential surfaces of the
spring, and as the spring is pulled around the other pulley, the
portions of the surfaces not peened as the segment traveled
around the first pulley will be peened.
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