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Intermediate layer for joining two portions of a golf club head

a golf club head and intermediate layer technology, applied in golf clubs, sport equipment, golf, etc., can solve the problems of reducing the resilience deformation ability, affecting the reliability so as to prolong the life of the golf club head product, improve the reliability of the joining process, and improve the product ratio

Inactive Publication Date: 2005-09-01
NELSON PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The intermediate layer improves bonding strength and reliability, extends the life of the golf club head by preventing cracking or breaking during use, and allows for easier adjustment of the inclination angle, as demonstrated by increased durability in cannon shot tests.

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

Examples

Experimental program
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first embodiment

[0029] Referring to FIG. 3, a golf club head in accordance with the present invention includes a first portion, a second portion, and an intermediate 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. A heel 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.

[0030] 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 intermediate 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 met...

second embodiment

[0035]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 intermediate layer 40 that is tablet-like, powdery, or pasty. Alternatively, the intermediate layer 40 is provided by electroplating or spraying. The annular wall 132 allows precise alignment between the head body 10 (the first portion), the intermediate 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

[0036]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 intermediate layer 40 that is tablet-like or pasty. Alternatively, the intermediate layer 40 is provided by electroplating or spraying. The annular wall 23 allows precise alignment between the head body 10 (the first portion), the intermediate 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

[0001] This application is a Divisional of co-pending application Ser. No. 10 / 725,544, filed on Dec. 3, 2003, and for which priority is claimed under 35 U.S.C. § 120; the entire contents of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] 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. [0004] 2. Description of Related Art [0005] 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...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
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