Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1980-09-05
1983-02-01
Crane, Daniel C.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29234, 29282, 72398, B23P 1100
Patent
active
043707882
ABSTRACT:
A method of lining a cylindrical bore for instance of an internal combustion engine with a thin-walled liner. Initially, a strip of material is cut to such a length that when formed into a cylindrical liner of external diameter equal to that of the unlined bore the liner is subjected to hoop-stress. The cut strip is pressed into a semi-circular groove in a jig-plate with a mandrel of at least part-circular form, and then two jig cheek-pieces each defining a quadrant-shaped groove are moved to deform the strip into a cylindrical shape. During this, the strip is held in the groove in the jig-plate for instance by electromagnets let into the jig-plate, or by a vacuum-holding technique. The grooves respectively in the jig-plate and jig-cheek pieces together define a cylinder of the same diameter as the bore to be lined, so that the liner is subjected to hoop-stress while in the jig. The liner is pressed out of the jig and into the bore, without releasing the hoop-stress, using an intermediate slave cylinder if required.
REFERENCES:
patent: 380107 (1888-03-01), Hall
patent: 1909887 (1933-05-01), Otte
patent: 1950726 (1934-03-01), Graybill
patent: 2005577 (1935-06-01), Dowd
patent: 2674782 (1954-04-01), Surtees
patent: 4013284 (1977-03-01), Demetre
patent: 4136431 (1979-01-01), Tucker
patent: 4185368 (1980-01-01), Kammeraad
Crane Daniel C.
Cross Manufacturing Company Limited
Groff, Jr. Emory L.
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