EP 0180855 B1 19890308 - PROCESS FOR INCREASING THE FATIGUE STRENGTH OF COMPONENT PARTS WITH VARIOUS FORMS
Title (en)
PROCESS FOR INCREASING THE FATIGUE STRENGTH OF COMPONENT PARTS WITH VARIOUS FORMS
Publication
Application
Priority
DE 3438742 A 19841023
Abstract (en)
[origin: US4682489A] The fatigue strength of high stress areas of components of diverse shapes is increased by cold forming by clamping the component resiliently between a base and a clamp member urged resiliently toward the base, and impacting the component area with a complementary shaped reciprocative snap die driven by a percussion piston. Two diverging dies may be driven by the same percussion piston to impact two spaced component areas such as opposed fillets of a crankshaft throw.
IPC 1-7
IPC 8 full level
C21D 7/04 (2006.01)
CPC (source: EP US)
C21D 7/04 (2013.01 - EP US); Y10T 29/17 (2015.01 - EP US)
Designated contracting state (EPC)
FR GB IT NL
DOCDB simple family (publication)
EP 0180855 A1 19860514; EP 0180855 B1 19890308; DE 3438742 A1 19860430; DE 3438742 C2 19880324; US 4682489 A 19870728
DOCDB simple family (application)
EP 85113475 A 19851023; DE 3438742 A 19841023; US 79723285 A 19851112