| 摘要 |
A new method of fabricating the joint between a golf club head and the golf club shaft, and the article fabricated therefrom, is described herein. The golf club head in which the shaft is inserted has a bore hole having a recessed contoured aperture. The hollow, metal, or electrically conductive golf club shaft is placed into the bore hole of the club head, and an electric coil is placed inside the shaft. The electric coil is electrically pulsed, causing the shaft to expand outwardly to fit the contour of the aperture. The electro-formed, mechanically-bonded shaft is now permanently and integrally anchored to the golf club head. The club head aperture is additionally fitted with a plurality of vertically-disposed grooves along the vertical shaft axis. These vertical grooves capture the shaft as it expands outwardly to the internal surface during electromagnetic forming. The electromagnetically-formed shaft expands into these grooves and is prevented from rotationally or angularly slipping about the club head. In another embodiment, a non-conductive shaft can be used. The non-conductive shaft contains a conductive sleeve that is electrically formed thereon, and is bonded to the club head by a second electro-forming process.
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