JPH09253246A - Golf club head - Google Patents

Abstract

(57) [Abstract] [Problem] In addition to having a high degree of freedom such as the surface shape of the sole portion,
(EN) Provided is an inexpensive golf club head in which variations in the angle formed by the face portion and the sole portion hardly occur. A housing portion (1) having a neck portion (12g).
2 and a faced sole 1 having a face portion 11b
And 1. The L-shaped sole 11 with a face is formed of a β-type titanium alloy by hot die forging, and the face portion 11b and the sole portion 11c are integrally formed. Opening 1 of bottom 12c of housing 12
2d, insert the sole portion 11c, face portion 11b
The peripheral edge portion of is abutted against the end surface 12f of the housing portion 12 and welded. Since the sole portion 11c is formed by forging, the degree of freedom of the surface shape and the like of the sole portion 11c is improved.
Since the sole portion 11c and the face portion 11b are integrally formed by forging, the sole portion 11c and the face portion 11b can be formed to have a constant angle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head made of metal, in which a neck portion for attaching a shaft is formed at an end portion and a hollow portion is formed inside.

[0002]

2. Description of the Related Art Examples of conventional golf club heads of this type include the following (1) and (2).

(1) A face with neck formed by integrally molding a neck portion and a face portion is attached by welding to a housing molded by precision casting.

(2) Like an example of a golf club head such as a driver having a head made of titanium or a titanium alloy shown in FIG. 4, the face shell 1, the top shell 2 and the sole shell 3 are made of titanium. Alternatively, it is produced by pressing a titanium alloy, the balance weight 4 is attached to the inner surface of the sole surface shell piece 3, and then the plurality of shell pieces 1, 2, 3 are integrated by welding. Note that reference numeral 2
Reference numerals a and 3a respectively indicate the neck portions of the upper surface shell piece 2 and the sole surface shell piece 3 (see Japanese Patent Laid-Open No. 63-154186).

[0005]

By the way, in the conventional golf club head of the above (1), since the housing is formed by casting, the degree of freedom of the surface shape of the sole portion is low, and at the time of manufacturing ( There is a problem that the angle formed by the face portion and the sole portion tends to vary during welding. Since the type (2) is a three-piece type with three shell pieces, there is a problem that the accuracy tends to be low due to welding strain and the like, the strength is low, and the manufacturing cost is high.

The present invention has been made in view of the above-mentioned problems of the prior art. In addition to having a high degree of freedom in the surface shape of the sole portion, variations in the angle formed by the face portion and the sole portion are unlikely to occur. Furthermore, it is an object of the present invention to provide a golf club head having a low manufacturing cost.

[0007]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a metal golf club head having a neck portion for mounting a shaft formed at an end portion and having a hollow inside portion. A housing with a neck formed by integrally molding the housing part by precision casting,
The face portion and the sole portion are integrally formed by forging, and the face portion and the sole portion are constituted by a sole with a face welded to the peripheral portion of the housing portion.

In the golf club head having the above structure, since the sole portion is formed by forging, the degree of freedom of the surface shape of the sole portion is improved as compared with precision casting. In addition, the sole with face is an L-shaped one in which the sole part and the face part are integrally formed by forging,
It is possible to manufacture a golf club head so that there is no variation in the angle formed by the sole part and the face part,
The second moment of area of the sole with face has increased,
Strength against bending moment is improved.

[0009]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view of an embodiment of a golf club head of the present invention, FIG. 2 is a perspective view of an embodiment of a golf club head of the present invention before assembly, and FIG. 3 is a view of a golf club head of the present invention. It is a longitudinal cross-sectional view of an example embodiment.

As shown in FIGS. 1 to 3, the golf club head A of this embodiment has a necked housing 13 in which a neck portion 12g and a housing portion (hollow member) 12 are integrated, and a face portion 11b. It is a two-piece type composed of a sole 11 with a face having

The housing 13 with a neck is made of a titanium alloy by precision casting (lost wax method) and has a crown portion 12a forming an upper portion of the housing portion 12 and a side portion 12b forming a side portion. , The bottom part 12c are integrally formed. Also, the crown part 1
A neck portion 12g to which the shaft S is attached is integrally molded with the 2a. A shaft insertion hole H is formed in the neck portion 12g by machining, and the shaft insertion hole H is formed from the upper end of the neck portion 12g through the inside to the lower end of the lower portion, and the shaft S ( Figure 1
(See) is inserted and fixed. Further, the bottom portion 12c is formed with an opening portion 12d into which a sole portion 11c described later is fitted and welded. Reference numeral 12e indicates a hollow portion of the housing portion 12.

On the other hand, the sole 11 with an L-shaped face
Is formed of a β-type titanium alloy by a hot die forging process described later, and a face portion 11b having a face surface F on the front surface, and a direction in which the face surface F faces from the lower edge of the face portion 11b. And a sole portion 11c that is integrally formed to stand up so as to extend in the opposite direction. The thickness t and Vickers hardness HV of the faced sole 11 are 1.6 to 16 mm and 280, respectively.
It is set in the range of 400.

In the opening 12d of the bottom 12c of the housing portion 12, the sole portion 11c of the faced sole 11 is provided.
To insert the peripheral portion of the face portion 11b into the housing 1
The club head A is obtained by abutting the end surface 12f of the second member 12 and welding the boundary portion between the housing portion 12 and the faced sole 11 in this state. In the present embodiment, since it is of the two-piece type, compared to the three-piece type, there is less deterioration in accuracy due to welding distortion and the like, and the time and effort required for alignment at the time of the butting are reduced, resulting in improved productivity. Excel.

The faced sole 11 is formed, for example, by the following manufacturing process. The β-type titanium alloy as a raw material is heated to a hot working region and subjected to a die forging process to obtain an L-shaped sole 11 with a face having an integral structure including a face portion 11b and a sole portion 11c. After that, the aging treatment is directly performed without performing the solution treatment step. In the above manufacturing process, since the solution heat treatment process is omitted after the hot die forging, the manufacturing process is simplified and the strength is improved by the synergistic effect of work hardening and age hardening. Further, since the metal fibers are formed by forging, the internal metal fibers are in a continuous state even after the processing, so that high strength can be maintained as compared with sheet metal processing or the like.

Since the sole portion 11c is formed by forging, the sole portion 11c is different from that for precision casting.
The degree of freedom of the surface shape and design of c is improved, and a logo can be applied by engraving. Further, since the face-equipped sole 11 is an L-shaped one in which the sole portion 11c and the face portion 11b are integrally formed by forging,
The golf club head can be manufactured so that the angle formed by the sole portion 11c and the face portion 11b does not vary, and the second moment of area of the sole 11 with a face is increased to improve the strength against bending moment. As a result, the present embodiment example is particularly effective for fairway woods, and is less likely to be damaged even if the golf club head is doubled at the time of hitting a ball.

[0016]

Since the present invention is configured as described above, it has the following effects. Since the sole portion is formed by forging, the degree of freedom of the surface shape and design of the sole portion is improved as compared with precision casting. Further, since the faced sole is an L-shaped one in which the sole portion and the face portion are integrally formed by forging, variation in the angle formed between the sole portion and the face portion is unlikely to occur, and the sectional second moment of the faced sole is As a result, the strength against bending moment is improved. As a result, this example embodiment
It is effective for fairway woods, and when hitting,
Even if the golf club head is doubled, it is not easily damaged. Further, since it is of a two-piece type, the accuracy is less likely to decrease due to welding distortion and the like, and the time and effort required for alignment at the time of the butting are reduced, resulting in excellent productivity and low manufacturing cost.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of a golf club head of the present invention.

FIG. 2 is a perspective view of an embodiment of the golf club head of the present invention before assembly.

FIG. 3 is a vertical sectional view of an embodiment of a golf club head of the present invention.

FIG. 4 is a perspective view of an example of a conventional golf club head before assembly.

[Explanation of symbols]

 A golf club head F face surface H shaft insertion hole S shaft 11 sole with face 11b face portion 11c sole portion 12 housing portion 12a crown portion 12b side portion 12c bottom portion 12d opening portion 12e hollow portion 12f end surface (peripheral portion) 12g neck portion 13 Necked housing

Claims (1)

[Claims] 1. A golf club head made of metal, wherein a neck portion to which a shaft is attached is formed at an end portion, and a hollow portion is formed inside, and a necked housing in which the neck portion and the housing portion are integrally formed by precision casting. A golf club head comprising a face portion and a sole portion integrally formed by forging, and a faced sole welded to a peripheral portion of the housing portion.