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Intermedia layer for joining two portions of a golf club head

Inactive Publication Date: 2005-06-09
NELSON PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007] An object of the present invention is to provide an intermedia layer for joining two portions of a golf club head by friction welding, providing improved joining reliability, improving good product ratio, and prolonging the life of the golf club head product.
[0008] Another object of the present invention is to provide an intermedia layer for joining a head body and a hosel of a golf club head by friction welding, providing improved joining reliability for the hosel, improving adjusting range of the inclination angle of the hosel, and prolonging the life of the golf club head product.
[0009] A further object of the present invention is to provide an intermedia layer for joining a head body and a weight member of a golf club head by friction welding, providing improved joining reliability for the weight member. SUMMARY OF THE INVENTION
[0011] The metallurgical compatibility between the first metal material and the third metal material is better than that between the first metal material and the second metal material, and the metallurgical compatibility between the second metal material and the third metal material is better than that between the first metal material and the second metal material.
[0012] In an embodiment of the invention, the first portion is a head body, and the second portion is a hosel. The bonding strength and bonding reliability of the golf club head product are improved by the intermedia layer. Further, subsequent adjustment of the inclination angle of the hosel is convenient, and the life of the golf club head product is prolonged. In another embodiment of the invention, the first portion is a head body, and the second portion is a weight member.

Problems solved by technology

Although the friction welding simplifies the manufacturing process and cuts the manufacturing cost in comparison to ordinary welding or brazing, several problems exist.
Since the metal material (e.g., stainless steel) of the flat abutting portion 131 differs from that (e.g., titanium alloy) of the flat abutting portion 22 and thus provides poor compatibility in welding, the metallurgic structure of the intermetallic layer is detrimental to improvement of the bonding strength, resulting in a fragile structure or reducing the resilient deforming capability.
The same problem exists when using friction welding to bond two portions of the club head that are made of different metals having insufficient compatibility.

Method used

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  • Intermedia layer for joining two portions of a golf club head
  • Intermedia layer for joining two portions of a golf club head
  • Intermedia layer for joining two portions of a golf club head

Examples

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first embodiment

[0027] Referring to FIG. 3, a golf club head in accordance with the present invention includes a first portion, a second portion, and an intermedia layer 40. In this embodiment, the first portion is a head body 10 made of a first metal material. A string plate 11 is formed on a front side of the head body 10 for striking a golf ball. Aheel 12 is formed on a side of the striking plate 11, with an extension 13 extending upward from the heel 12 and having an abutting portion 131.

[0028] The second portion is a hosel 20 having an engaging hole 21 in an upper part thereof for engaging with a shaft 30. The hosel 20 further includes an abutting portion 22 formed at a lower part thereof. The hosel 20 is made of a second metal material. The intermedia layer 40 is made of a third metal material. The first metal material, the second metal material, and the third metal material are different from one another. The metallurgical compatibility between the first metal material and the third metal ma...

second embodiment

[0033]FIGS. 6 and 7 illustrate the present invention, wherein the abutting portion 131 of the head body 10 (the first portion) includes an annular wall 132 delimiting a space (not labeled) for receiving the intermedia layer 40 that is tablet-like, powdery, or pasty. Alternatively, the intermedia layer 40 is provided by electroplating or spraying. The annular wall 132 allows precise alignment between the head boy 10 (the first portion), the intermedia layer 40, and the hosel 20 (the second portion). After friction welding, the annular wall 132 can be kept or removed by proper surface finishing, providing a golf club head product (see FIG. 5).

third embodiment

[0034]FIGS. 8 and 9 illustrate the present invention, wherein the abutting portion 22 of the hosel 20 (the second portion) includes an annular wall 23 delimiting a space (not labeled) for receiving the internedia layer 40 that is tablet-like or pasty. Alternatively, the intermedia layer 40 is provided by electroplating or spraying. The annular wall 23 allows precise alignment between the head boy 10 (the first portion), the intermedia layer 40, and the hosel 20 (the second portion). After friction welding, the annular wall 23 can be kept or removed by proper surface finishing, providing a golf club head product (see FIG. 5).

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Abstract

A golf club head includes a first portion forming a part of the head body of the golf club head, a second portion forming another part of the head body of the golf club head, and an intermediate layer. The first portion, the second portion, and the intermediate layer are made of different materials. Each of the first portion and the second portion has an abutting portion, with the intermediate layer being positioned between the abutting portion of the first portion and the abutting portion of the second portion. The intermediate layer and the abutting portion of the first portion are joined together by friction welding, and the intermediate layer and the abutting portion of the second portion are joined together by friction welding, thereby forming a golf club head product

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a golf club head. In particular, the present invention relates to a golf club head that is produced by means of joining two portions of the golf club head by friction welding. [0003] 2. Description of Related Art [0004] A typical golf club head and a production method therefore are disclosed in, e.g., U.S. Pat. Nos. 5,769,307 and 5,885,170. As illustrated in FIGS. 1 and 2 of the drawings which respectively correspond to FIGS. 1 and 2 of U.S. Pat. Nos. 5,769,307 and 5,885,170, a typical golf club includes a head body 10, a hosel 20, and a shaft 30. The head body 10 is made of a metal material and includes a striking plate 11 on a front side thereof, with a heel 12 being formed on a side of the striking plate 11, and with an extension 13 extending upward from the heel 12 and having a flat abutting portion 131. Another flat abutting portion 22 is formed at a lower part of the hosel 20 t...

Claims

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Application Information

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IPC IPC(8): A63B53/02A63B53/04
CPCA63B53/02A63B2053/0491A63B2053/0433Y10T29/49968Y10T29/49993Y10T29/49982Y10T29/49885A63B53/047A63B53/0433A63B53/04
Inventor HUANG, CHUN-YUNGCHEN, CHAN-TUNG
Owner NELSON PRECISION CASTING