Method of making a yoke for universal joint

Details Method of making a yoke for universal joint Method of making a yoke for universal joint

1997-05-30

2000-04-18

Echols, P. W.

Metal working

Method of mechanical manufacture

Shaping one-piece blank by removing material

17340, B23P 1304

Patent

active

060499648

ABSTRACT:
A production process of a yoke a for universal joint using a flat metal sheet to make a yoke for universal joint comprising a base for engaging with an end of a rotary shaft and fixing the end, a pair of arms having respective surfaces opposite to each other and extending in the axial direction of the base from opposite positions in the diameter direction and on one axial edge of the base, and press-worked circular holes coaxial with each other, formed in associated tip portions of said respective arms, wherein in portions of said flat metal sheet to become said respective circular holes, prepared holes having an inner diameter sufficiently smaller than an inner diameter of the circular holes are punched by press working, thereafter the flat metal sheet is curved to form said base and the pair of arms, then rough machining is carried out to punch the portions of the prepared holes in a nearly circular shape by press working, and thereafter press working is carried out to shave an inner peripheral edge of each hole by a small shaving amount, thereby forming the press-worked circular holes.

REFERENCES:
patent: 4334414 (1982-06-01), Stephan
patent: 4505608 (1985-03-01), Haldric
patent: 4507007 (1985-03-01), Mallet
patent: 4662047 (1987-05-01), Berchem
patent: 5188474 (1993-02-01), Ohkubo et al.
patent: 5362170 (1994-11-01), Fevre
patent: 5797173 (1998-08-01), Wagner

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