JP2004065660A - Golf club head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club head comprising a front part and a back part and forming a face portion and a crown portion of the front part to have prescribed thickness. <P>SOLUTION: This golf club head comprises the front part 1 composed of the face portion 2 and the crown portion 3, and the back part 10 constituting the remaining portion. The front part 1 and the back part 10 are welded. The front part 1 is manufactured by bending a plate having a thick-walled part 41 and a thin-walled part 42. The face portion 2 has a thickness of about 2-3mm, and the crown portion 3 has a thickness of about 0.8-1.2mm. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a metal hollow golf club head, and more particularly to a wood-type golf club head having a shape similar to that of a wood type.
[0002]
[Prior art]
Hollow metal golf club heads such as drivers and fairway woods are widely used. In general, as shown in FIG. 5, a hollow wood-type golf club head 21 includes a face portion 22 for hitting a ball, a crown portion 23 constituting an upper surface portion of the golf club head, and a golf club head. It has a sole portion 24 that constitutes a bottom surface portion, a side portion 25 that constitutes side surfaces on the toe side, rear side, and heel side of the golf club head, and a hosel portion 26. A shaft 27 is inserted into the hosel portion 26 of the golf club head 21 and fixed with an adhesive or the like. Recently, many golf clubs referred to as utility clubs are also commercially available, and one type of utility golf club is similar to the wood-type golf club head (that is, the face portion, the sole portion, the side portion, and the like). Various golf clubs having a head (having a crown portion and a hosel portion) are also commercially available.
[0003]
As a metal constituting the hollow golf club head, an aluminum alloy, stainless steel, or titanium alloy is used, but in recent years, a titanium alloy is particularly widely used.
[0004]
JP-A-8-266690 discloses a metal wood head in which a face / crown member integrally having a face portion, a crown portion and a hosel portion and a remaining sole / back face member are forged and these members are welded. Has been described.
[0005]
Japanese Patent Application Laid-Open No. 10-179821 discloses a pressing device for forging an L-shaped side view part in which a relatively thick face portion and a relatively thin crown portion are integrated from a single flat plate having a uniform thickness. Is described.
[0006]
[Problems to be solved by the invention]
It is an object of the present invention to provide a golf club head having a front part in which a relatively thick face part and a relatively thin crown part are integrated, and in which the front part is easily manufactured. To do.
[0007]
[Means for Solving the Problems]
The golf club head of the present invention is a metal hollow golf club head having a face portion, a sole portion, a side portion, a crown portion, and a hosel portion. At least a main portion of the crown portion and the face portion are integrated. A golf club head in which the front part and the back part are joined to each other, and the thickness of the crown part is the face. The front part is formed by bending a base plate having a face area with a large thickness and a crown area with a small thickness. It is.
[0008]
When manufacturing the front part of the golf club head according to the present invention, a thick face part planned area and a thin crown part planned area are provided in advance on the base plate of the front part. A front part having a thick face portion and a thin crown portion is manufactured by bending the base plate by the above method. This base plate can be easily bent along the boundary between the thick face portion and the thin crown portion.
[0009]
In the present invention, irregularities may be provided on the back surface (the surface opposite to the ball striking face) of the face portion planned area of the base plate. By doing so, it becomes possible to make the face deformation amount at the hit point position more uniform, and the high repulsion hit point region (so-called high repulsion area) is expanded.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments will be described with reference to the drawings. 1 is an exploded perspective view of a metal golf club head according to an embodiment, FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1, FIG. 3 is a side view from the heel side in FIG. It is a manufacturing-process figure of the front part of the golf club head which concerns on this form.
[0011]
This golf club head includes a front part 1 composed of a face part 2 and a crown part 3, and a back part 10 constituting the remaining part. The front part 1 is formed by bending the base plate 40. The crown part 3 is thinner than the face part 2. The thickness of the face portion 2 is preferably 2 to 3 mm, and the thickness of the crown portion 3 is preferably 0.8 to 1.2 mm.
[0012]
The back part 10 includes a sole portion 11, a side portion 12 that forms side wall surfaces on the toe side, rear side, and heel side of the golf club head, and a crown peripheral portion 13 that extends along the side portion 12. And the hosel part 14. The crown peripheral portion 13 starts from the vicinity of the front end of the side portion 12 on the toe side, and extends so as to circulate from the rear side of the side portion 12 to the heel side.
[0013]
The crown peripheral portion 13 projects in a hook shape toward the center of the crown of the golf club head.
[0014]
In the vicinity of the heel side face portion of the crown peripheral portion 13, the hosel portion 14 protrudes upward. The hosel portion 14 has a cylindrical shape, and a shaft (not shown) is inserted therein and fixed by an adhesive.
[0015]
The hosel portion 14 extends from the lower surface side of the crown peripheral portion 13 to the sole portion 11. In the peripheral region of the hosel portion 14, the crown peripheral portion 13 has a substantially conical shape with an upward slope toward the hosel portion 14.
[0016]
The crown part 3 of the front part 1 extends from the upper end of the face part 2 to the rear side. This extension length is preferably 25 mm or more, particularly preferably 30 mm or more. The crown 3 has a substantially semicircular shape in plan view. The crown portion 3 and the crown peripheral portion 13 are welded. However, the crown peripheral portion 13 may be made smaller or not at all, and the crown portion 3 may be made larger than shown.
[0017]
As the metal material of the hollow golf club head, stainless steel or titanium alloy is particularly preferable.
[0018]
As stainless steel, SUS304 and SUS630 are preferable. As the titanium alloy, α-β titanium alloy and β titanium alloy are preferable. Examples of the α-β titanium alloy include Ti-6Al-4V and Ti-4.5Al-3V-2Fe-2Mo. This Ti-4.5Al-3V-2Fe-2Mo can be plastically deformed at a temperature lower than that of Ti-6Al-4V, for example, at 600 to 900 ° C. Examples of the β-titanium alloy include Ti-15Mo-5Zr-3Al, Ti-15V-3Cr-3Al-3Sn, Ti-20V-4Al-1Sn, and the like. These β-titanium alloys are easy to be plastically deformed and have good workability due to warmness or coldness.
[0019]
In order to manufacture the front part 1, as shown in FIG. 4, a round bar is rolled using a roll 21 having a large diameter portion and a small diameter portion and an equal diameter roll 22, or a step surface is provided on a press surface. The base plate 40 having the thick portion 41 and the thin portion 42 is manufactured by pressing with the press die including the upper die 31 and the lower die 32 having a flat press surface. In addition, you may manufacture the base plate 40 of the shape of illustration by cutting.
[0020]
Next, the base plate 40 is bent by a press device to manufacture the front part 1. Concavities and convexities may be formed on the back surface 2a (the surface facing the inside of the golf club head) 2a of the face portion 2 by providing irregularities on a part of the mold surface of the pressing device. Further, in order to facilitate this bending, the thickness of the peripheral portion of the thick portion 41 and the vicinity of the boundary portion between the thick portion 41 and the thin portion is made smaller than illustrated, and the face portion 2 and the crown portion 3 The base plate 40 may be easily bent in the vicinity of the crossing portion 2b.
[0021]
The back part 10 is formed by casting, die forging, press forging, press forming, or the like. The hosel portion 14 may be formed integrally with other portions, or may be welded as a separate body formed by cutting or the like.
[0022]
The front part 1 and the back part 10 are preferably joined by welding such as TIG welding. In the case of a titanium alloy, the front part 1 and the back part 10 are preferably welded in an inert gas atmosphere such as argon.
[0023]
【Example】
Examples will be described below.
[0024]
[Example 1]
A golf club head made of a titanium alloy having a volume of 350 cc having the structure shown in FIGS.
[0025]
First, a round bar made of Ti-4.5Al-3V-2Fe-2Mo, which is an α-β titanium alloy, was heated to about 800 ° C. and pressed by appropriately heated dies 31 and 32 to produce a base plate 40. . The thickness of the thick part 41 is 3 mm, and the thickness of the thin part 42 is 1 mm. At this time, argon gas was blown so that the titanium alloy was not oxidized. In addition, when a glass-based coating agent or the like is used to prevent surface oxidation, a coating film of the coating agent is formed on the surface, and scale generation can be prevented. The base plate 40 obtained by pressing was immediately supplied to the front part molding press die without cooling, and the front part 1 was molded by pressing. The thickness of the face part was 3 mm, and the thickness of the crown part was 1 mm. Separately, the back part 10 was forged using Ti-6Al-4V, which is an α-β type titanium alloy, by forging.
[0026]
These front part 1 and back part 10 were TIG welded in an argon gas atmosphere to produce a golf club head.
[0027]
[Example 2]
A plate material of Ti-15V-3Cr-3Al-3Sn having a thickness of 3 mm, which is a β-titanium alloy, is passed between rolls 21 and 22 and cold-rolled, and the thick portion 41 has a thickness of 3 mm and a thin portion. 42, a base plate 40 having a thickness of 1 mm was manufactured. In addition, since work hardening arises by this cold rolling, solution treatment was performed after cold rolling. In the solution treatment, the substrate was heated to 600 ° C. or more, strain was removed and softened, and recrystallization was performed. By performing the solution treatment, workability is improved. The solution-treated base plate 40 was heated to 200 ° C. at which the β phase did not precipitate, and press-molded to produce the front part 1.
[0028]
Thereafter, the front part 1 was TIG welded to the same back part 10 as in Example 1 to produce a golf club head. Since the β-titanium alloy is easily plastically deformed unless it is subjected to an aging treatment, it was subjected to an aging treatment at 440 ° C. for 8 hours after welding. Note that Ti-15V-3Cr-3Al-3Sn, which is a β-type titanium alloy, can have a tensile strength of about 1000 MPa by solution treatment.
[0029]
When the golf club heads of Examples 1 and 2 were trial hit, the hit feeling was soft and the hitting ball was easy to rise. This is presumably because there was no weld bead between the face portion and the crown portion, and the center of gravity of the golf club head was lowered and deepened by the absence of this bead.
[0030]
【The invention's effect】
As described above, according to the present invention, it is possible to easily manufacture a golf club head including a front part and a back part, and having a face part and a crown part of the front part having a predetermined thickness.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of a golf club head according to an embodiment.
2 is a cross-sectional view taken along line II-II in FIG.
3 is a side view from the heel side of the golf club head of FIG. 1. FIG.
FIG. 4 is a manufacturing process diagram of the golf club head according to the embodiment.
[Figure 5]
It is explanatory drawing of the conventional golf club head.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front part 2 Face part 3 Crown part 10 Back part 11 Sole part 12 Side part 13 Crown peripheral part 14 Hosel part

Claims (3)

In a metal hollow golf club head having a face portion, a sole portion, a side portion, a crown portion and a hosel portion,
A front part in which at least a main part of the crown part and the face part are integrated;
It consists of a back part that integrates parts other than the front part,
A golf club head in which the front part and the back part are joined,
The thickness of the crown portion is smaller than the thickness of the face portion,
2. The golf club head according to claim 1, wherein the front part is formed by bending a base plate having a thick face portion planned area and a thin crown section planned area. 2. The golf club head according to claim 1, wherein unevenness is provided on the back surface of the face portion planned area of the base plate of the front part. 3. The golf club head according to claim 1, wherein the face part planned area of the front part has a thickness of 2 to 3 mm, and the crown part planned area has a thickness of 0.8 to 1.2 mm. .

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