JPH06121847A - Production of golf clubhead - Google Patents

Abstract

PURPOSE:To provide a producting method of a golf clubhead which sufficiently demonstrates the characteristics of titanium or a titanium alloy (light and excel lent repulsive force and anti-corrosiveness) and smoothly and securely lowers the center of gravity of the head. CONSTITUTION:A metallic member 30 having a heavier specific gravity than a head body 10 made of titanium or a titanium alloy is covered with a covering member 31 made of titanium or a titanium alloy to form a sole cover 20. The covering member 31 provided with a heavy weight in the sole cover 20 is fixed to the head body 10. And hence, the center of gravity of the whole head can easily be lowered by smoothly and securely attaching the sole cover 20 to the head body 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a golf club head composed of a plurality of divided members.

[0002]

2. Description of the Related Art Conventionally, the head of a golf club driver or the like is made of wood, and a metal head is attached to the sole surface of the wood head, and a resin or other insert is attached to the face surface for reinforcement. It was However, in recent years, golf clubs such as drivers that have a metal or alloy head called metal wood (hereinafter referred to as metal wood) have also appeared, and this metal wood extends the flight distance of the hit ball and hits with accurate directionality. It is easy and gradually replacing golf clubs such as drivers with wooden heads.

Particularly, recently, a metal wood having a head made of titanium or titanium alloy, which is excellent in repulsive force and corrosion resistance among metals or alloys, has been proposed (see JP-A-63-154186). As shown in FIG. 2, this titanium or titanium alloy head is produced by pressing a face surface shell piece 1, an upper surface shell piece 2 and a sole surface shell piece 3 with titanium or a titanium alloy, respectively, and After mounting the balance weight 4 on the inner surface of the piece 3, the plurality of shell pieces 1, 2 and 3 were integrated by welding to manufacture a head made of titanium or a titanium alloy.

By the way, the above-mentioned titanium or titanium alloy head has a problem that the welded portion is long. In order to solve this problem, the applicant of the present invention has made titanium or titanium having a small opening and a cavity. Most of the titanium alloy head is produced by precision casting, and then a balance weight is fixed in the cavity through the opening, and the opening is sealed with a titanium or titanium alloy lid manufactured by press working. The obtained head was proposed (see Japanese Patent Application No. 1-187155).

[0005]

On the other hand, the lower the center of gravity of the head, the easier the ball is to go up and the club that is easier to hit. Therefore, it is desired to develop a club having a low center of gravity. In the case of a head made of titanium or a titanium alloy, since the entire head is made of the same kind of metal, there is a limit in significantly lowering the center of gravity of the head.

The present invention has been made in view of the above circumstances, and an object of the present invention is to have the characteristics of titanium or a titanium alloy (light weight and excellent repulsion force and corrosion resistance).
It is an object of the present invention to provide a method for manufacturing a golf club head, which is capable of sufficiently exerting the above-mentioned effect and smoothly and reliably lowering the center of gravity of the head.

[0007]

In order to achieve the above object, the present invention is a method of manufacturing a golf club head comprising a plurality of divided members, which includes at least a face portion and a neck portion. By integrally casting a hollow head body having an opening formed on the bottom surface with titanium or a titanium alloy, and by coating a metal member that is heavier than the specific gravity of the head body with a coating member made of titanium or a titanium alloy. Forming a sole lid having a shape corresponding to the opening of the head body, further attaching the sole lid to the opening of the head body, and then fixing a covering member of the sole lid to the head body. .

[0008]

In the method of manufacturing a golf club head of the present invention, a sole lid formed by coating a metal member having a specific gravity higher than that of a head body made of titanium or titanium alloy with a coating member is used, and the sole is made heavy. By fixing the cover member of the lid to the head body, the sole lid is smoothly and surely attached to the head body, and the center of gravity of the entire head is easily lowered.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

In the figure, reference numeral 10 is a hollow titanium alloy "for example Ti-6" formed inside a precision casting mold made of alumina.
% Al-4% V (above wt%) ”is poured and solidified to produce a metal wood head body. The alumina precision casting mold is produced by the lost wax method. Further, the head body 10 is
A hollow part having an opening 11 formed on the bottom surface, and a head part 12 having a face surface 13 on the front part 12 of the head.
And a neck portion 16 having a shaft hole 15 is formed. Then, the opening 11 inside the head body 10
A tapered portion 11a is formed on the.

On the other hand, in the sole lid 20 having a shape and size corresponding to the opening 11, a metal member 30 made of copper and having a heavier specific gravity than the head main body 10 is pressed by a plate-shaped covering member made of pure titanium. It is covered with 31. A recess 30 is formed on the surface of the metal member 30.
a is formed, and the recess 3 is formed by the press molding.
A concave portion 31a is formed on the surface of the covering member 31 corresponding to 0a. In addition, the sole lid 20
The taper portion 11a of the opening 11 is fixed by welding (indicated by 40 in FIG. 1 is a welded portion).

The head body 10 constructed as described above is precision-cast in advance, and the surface of the metal member 30 is covered with a plate-shaped covering member 31 by press molding to form the sole lid 20. Sole lid 2
In the covering member 31 of 0, the recess 3 of the metal member 30
0a, a recess 31a formed corresponding to 0a is welded, and the weld protrusion 41 is ground to the surface of the covering member 31 to fill the recess 31a, and then the recess 11a is formed in the opening 11 of the head body 10. The sole lid 20 is fitted, and then the annular gap formed between the sole lid 20 and the tapered portion 11a of the opening 11 is filled by welding to fix the head body 10 and the sole lid 20. In the golf club head assembled in this way, the sole lid 20 is formed by coating the surface of the metal member 30 having a higher specific gravity than the head body 10 with the coating member 31, The specific gravity of the sole lid 20 including the member 30 and the covering member 31 is heavier than that of the head body 10, and thus a club head having a low center of gravity can be easily manufactured. Further, a recess 30a is formed on the surface of the metal member 30 of the sole lid 20, and the recess 30a is formed corresponding to the recess 30a during press molding for covering the surface of the metal member 30 with the covering member 31. By forming the recess 31a in the covering member 31, the metal member 30 and the covering member 31 are firmly adhered to each other and are not easily separated from each other. Therefore, even after the golf club head is assembled, the metal member 30 does not come into close contact with the covering member 31 and is not separated from the covering member 31, and a good quality product can be obtained. .

[0013]

As described above, the present invention is a method for manufacturing a golf club head composed of a plurality of divided members, which includes at least a face portion and a neck portion, and has an opening on the bottom surface. The hollow head body formed with is integrally cast with titanium or a titanium alloy, while a metal member heavier than the specific gravity of the head body is covered with a covering member made of titanium or a titanium alloy to form an opening in the head body. Since a sole lid having a shape corresponding to the portion is formed, the sole lid is attached to the opening of the head body, and the covering member of the sole lid is fixed to the head body, titanium or titanium alloy is used. Made of metal, which has a heavier specific gravity than the head body, is covered with a covering member. By fixing the body smoothly and surely it can be attached to the sole closure to the head main body,
Moreover, the center of gravity of the entire head can be easily lowered,
Therefore, the characteristics of titanium or a titanium alloy (light weight and excellent repulsion force and corrosion resistance) can be sufficiently exhibited, and a product in which the ball easily rises and is easy to hit can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a golf club head showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a conventional golf club head.

[Explanation of symbols]

 10 Head Main Body 11 Opening Part 14 Face Part 16 Neck Part 20 Sole Lid 30 Metal Member 31 Covering Member

Claims (1)

[Claims] 1. A method for manufacturing a golf club head composed of a plurality of divided members, wherein a hollow head body including at least a face portion and a neck portion and having an opening formed on a bottom surface is made of titanium. Alternatively, while integrally casting with a titanium alloy, a metal cover that is heavier than the specific gravity of the head body is covered with a titanium or titanium alloy covering member to form a sole lid having a shape corresponding to the opening of the head body. Then, after further attaching the sole lid to the opening of the head body, the covering member of the sole lid is fixed to the head body.