Method of manufacturing vehicle steering wheel metal core unit

Details Method of manufacturing vehicle steering wheel metal core unit Method of manufacturing vehicle steering wheel metal core unit

1996-01-31

1997-12-16

Lin, Kuang Y.

Metal founding

Process

Shaping liquid metal against a forming surface

B22D 1904

Patent

active

056974205

ABSTRACT:
A method of manufacturing a vehicle steering wheel metal core unit is provided. The core unit includes a tubular boss member 24 defining a tapered portion at the lower inner peripheral surface thereof, a groove 29 at the lower end of the inner peripheral surface thereof, and a compression-deformable annular projection 30 at the bottom surface thereof. The method includes setting the boss member in die casting mold 17 and closing the mold such that the molding surfaces 18a, 19a thereof are brought into pressure contact with the upper end surface 24a and the lower end surface 24b of the boss member, respectively, thereby plastically deforming the annular projection 30. Thereafter, die casting metal is injected into the mold around the boss member 24. With this method, the steering wheel metal core unit can be manufactured without the generation of fins and deformation of a tapered portion adapted to be coupled to the steering wheel shaft. Thus, manufacturing man-hours and cost can be reduced.

REFERENCES:
patent: 4313249 (1982-02-01), Douthwaite

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