METHOD FOR MANUFACTURE OF BIMETAL CENTRAL ELECTRODE FOR SPARK PLUG OF COMBUSTION ENGINE Russian patent published in 2013 - IPC H01T21/02 

Abstract RU 2498469 C1

FIELD: electricity.

SUBSTANCE: method for manufacture of bimetal central electrode for spark plug of combustion engine involves cold direct extrusion of bimetal cylindrical blank with transversal or longitudinal-transverse lamination through single-channel matrix of circular cross-section. At that flattened cone matrix is used. Cone-apex angle of the matrix can be equal to 80-120°. Diameter of the matrix cone can be equal to 0.7-0.9 of the container diameter. Lengthening coefficient is equal to 4-9.

EFFECT: manufacturing of bimetal central electrodes having even thickness of side sheath in transversal and longitudinal cross-section of electrode at its bigger length thus increasing stability of thermal performance of spark plug and providing sparking fail-safety.

4 cl, 6 dwg, 2 tbl

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RU 2 498 469 C1

Authors

Medvedev Evgenij Borisovich

Golubev Oleg Vjacheslavovich

Medvedev Andrej Evgen'Evich

Dates

2013-11-10Published

2012-06-01Filed