JP2002253706A - Golf club and method of manufacturing for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club which is easy to regulate its center position of gravity and has a head of a larger size. SOLUTION: The head 1 formed by integrally combining a plurality of respective divided shells 11, 12, 13 and 14 is provided with a shaft 7. The respective divided shells 11, 12, 13 and 14 are formed to a prescribed thickness like a thickness (a) by grinding using blasting shots S. The weight can be freely distributed by the reduction in weight accompanying the grinding and the regulation of the center position of gravity is made easier and the head of the larger size can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a golf club and a method of manufacturing the same.

[0002]

SUMMARY OF THE INVENTION Conventionally, JP-A-11-1
FIG. 1 of Japanese Patent No. 9254 discloses a golf club called a so-called metal wood in which a shaft is provided on a head obtained by integrally combining a face shell, a sole, a peripheral shell, and a crown shell as a metal split shell. . And
As one of the manufacturing methods of such a golf club head, there is known a method of punching a part from a thin plate material, pressing and bending the part to a predetermined shape, and then welding and combining the parts. . In such a case, each part has a substantially uniform thickness in press production. For example, if the head is divided into a face shell, a sole / surround surface shell, and a crown shell as described above, and the parts are manufactured, each of them has a substantially uniform wall thickness. There is a limit. Also, in this method, the material is titanium alloy and the volume is 300.
Although a large head of the cc class can be manufactured, it may not be possible to control the position of the center of gravity by attaching a separate weight due to weight restrictions.

In order to solve this problem, the face, its peripheral portion, the sole, and the like must be made thick enough to withstand the impact of a hit, and the other portions should be made thinner than before. Specifically, a portion to be thinned is joined using a thin plate, or as described in paragraph No. 0008 of JP-A-8-155022, at least a part of the entire surface and / or the inner surface or at least a part of each surface. Are chemically ground to adjust the weight and thickness of the hollow club head material.

However, such a method has the following problems. Increasing the number of parts and increasing the cost of using a method of partially attaching a thinner plate causes the parts to be deformed due to the thermal effect when they are joined by welding. Thin plates are even more susceptible. Therefore, the shape of the head is not stable. Meanwhile, chemical grinding,
In particular, when pickling titanium, the titanium absorbs hydrogen and becomes brittle. In particular, a β-type titanium alloy currently used as a head material has a high degree.

[0005] By the way, blasting is a processing method in which an abrasive (blasting material) is sprayed onto the surface of a material by using compressed air, centrifugal force, or the like to grind the material. -2328
No. 75, a method for sandblasting a golf club head, a method for manufacturing a golf club head disclosed in Japanese Patent No. 2865127, a golf club disclosed in Japanese Patent Application Laid-Open No. 9-182818, and a method for manufacturing the same are known. In the first prior art, a mark is formed on a head by bringing a mask layer into close contact with an engraved surface of the head and spraying abrasive grains (lower left column, page 2 to page 2, page 2). The second prior art relates to a method of manufacturing a golf club head in which at least the face and sole of the head are formed from a magnesium-based alloy, wherein the surface is cleaned by blasting the magnesium-based alloy (paragraph 0005). In the third prior art, fine irregularities are formed on at least the face of the head by sandblasting or the like (paragraph 0005).

However, in such a method of manufacturing a golf club head utilizing blasting, there has been known a method of forming an engraved mark, cleaning, fine unevenness, etc., but there is no technical idea of adjusting the thickness of the divided shell. Was.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a golf club having a larger head that can easily adjust the position of the center of gravity by arbitrarily controlling the thickness of the golf club head and a method of manufacturing the golf club. And

[0008]

According to a first aspect of the present invention, there is provided a golf club in which a shaft is provided on a head formed by integrally combining a plurality of metal split shells, wherein at least a part of the split shell is ground by blasting. A golf club having a predetermined thickness.

According to the structure of the first aspect, the thickness can be adjusted by grinding by blast.

According to a second aspect of the present invention, there is provided the golf club according to the first aspect, wherein at least a part of the same surface of the split shell is formed to have a different thickness by grinding by blasting.

According to the structure of the second aspect, at least a part of the same surface can be ground to adjust the thickness on the same surface.

According to a third aspect of the present invention, there is provided a method of manufacturing a golf club in which a head is provided with a shaft in which a plurality of divided metal shells are integrally combined, and at least a part of the divided shells is adjusted in thickness by blasting. A method of manufacturing a golf club.

According to the third aspect of the present invention, the divided shell can be ground by blast grinding to form a predetermined thickness at a predetermined position.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the accompanying drawings. A golf club head (hereinafter referred to as a head) 1 made of a titanium alloy includes a face portion 2 serving as a hitting surface, a crown 3 on an upper surface, a sole portion 4 and a side peripheral portion 5.
The shaft 7 having a grip (not shown) provided at an upper end thereof is connected to the hosel 6. The head 1 includes a face shell 11 and a crown 3 corresponding to a plurality of divided metal shells, in this embodiment, a three-piece face portion 2.
The edge portions of the crown shell 12, the sole shell 4 corresponding to the sole portion 4, and the side peripheral shell 14 corresponding to the side peripheral portion 5 are welded and integrally joined. The face shell 11, crown shell 12, sole shell 13, and side shell 14
Is obtained by punching a thin plate made of a titanium alloy or the like, pressing and bending the plate, and assembling the respective edges together by welding. The shells 11, 12, 13, 14 may be manufactured by hot forging or casting.

Further, a half-sided hosel shell 15 which forms a half of the hosel 6 is continuously provided on the minus side of the crown shell 12. A half hosel shell 16 which forms a half of the hosel 6 is continuously provided on the side of the side peripheral shell 14. The edges of the half hosel shells 15 and 16 are integrally joined together with the face shell 11 and the like by welding. A mounting pipe 17 for the shaft 7 is inserted into the hosel 6 formed by the half hosel shells 15 and 16.

The thickness of each of the shells 11, 12, 13, and 14 is adjusted by blasting in which an abrasive (blast material) is sprayed on the surface of the material by using compressed air, centrifugal force, or the like to grind the material.
That is, in the grinding process by blasting, a work S (shells 11, 12, 13, 14) previously set on the turntable T is applied to a polishing material S made of metal such as iron, sand carbide, and oxide, specifically,
For example, green carborundum GC @ 80 or the like is set to 0.
The surface of the work is ground by contacting the surface of the work at a high speed by using the injection pressure of 5 MPa. The ground surface is the outer surface or the inner surface of each of the shells 11, 12, 13, and 14. By the grinding, for example, the thickness A at the center of the face shell 11 is set to 2.6 m.
m, and the center portion is formed thick so that the thickness a of the peripheral portion surrounded by the dashed dotted line is 1.8 mm. The crown shell 12 is formed so as to have a thick peripheral portion so that the peripheral portion has a thickness B of 1.0 mm and the central portion has a thickness b of 0.8 mm surrounded by a dashed dotted line. Further, the thickness C of the sole shell 13 is set to 1.15.
mm and the thickness c of the side shell 14 surrounded by the dashed dotted line is 0.8 mm, and the sole shell 13 is formed thick.

After the shells 11, 12, 13, and 14 are formed by adjusting the thickness in this manner, if necessary, after being pressed into a predetermined shape by press working, the respective edges are welded together with the half-split. The hosel 6 is formed by the hosel shells 15 and 16, the mounting pipe 17 is inserted into the hosel 6, and the shaft 7 is inserted into the mounting pipe 17.

As described above, in the above embodiment, in the golf club in which the shaft 7 is provided on the head 1 in which the plurality of divided shells 11, 12, 13, and 14 are integrally combined,
11, 12, 13, and 14 were formed with predetermined thickness portions such as thicknesses a, b, and c by grinding with blast shot S.
For example, each of the divided shells 11, 12, and 14 can be reduced in weight by about 5 g, and the reduced weight can be freely distributed, so that the position of the center of gravity can be easily adjusted, and a larger head can be used. Can be provided. Moreover,
Compared with the chemical treatment, the shape stability, cost and strength can be maintained. In addition, by adjusting the thicknesses a, b, and c of the thickness head 1 of each of the divided shells 11, 12, and 14,
It is possible to adjust not only the position of the center of gravity but also the moment of inertia depending on the portion to be ground.

Further, at least a part of the same surface is ground by blast grinding so that the peripheral portion is ground and the thickness a thereof is made smaller than the thickness A of the central portion like the face shell 11. Due to the formation, the thickness can be adjusted even on the same surface as the face portion 2 to reduce the weight, to achieve more precise weight distribution, and to improve the design flexibility.

In addition, each of the plurality of metal divided shells 11, 12, 1
In the method of manufacturing a golf club in which the shaft 7 is provided on the head 1 in which the divided shells 1 and 14 are combined,
By adjusting the wall thickness of at least a portion of 1, 12, 13, and 14 by grinding with blast shot S, even a titanium alloy or the like can be stably thinned. In addition, since the grinding material S collides with the desired position in the grinding by the blast, a desired portion in each of the divided shells 11, 12, 13, and 14 can be easily formed to a desired thickness.
In addition, it is superior in shape stability, cost and strength retention as compared with chemical treatment and lamination of thin plates.

Further, in the above embodiment, the turntable T
Since each of the divided shells 11, 12, 13, and 14 is set for grinding, automation is possible and continuous processing can be performed.

The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. Although the embodiment shows the case of the hollow metal head, the present invention can be applied to an iron type head and a putter head. In the embodiment, the face shell 1
1, the crown shell 12, the sole shell 13 and the side shell 14 are shown with the side shell 14 ground.
At least one of the shell 11, the crown shell 12, the sole shell 13 and the side shell 14 may be ground. In addition, the grinding of parts is shown. The finished or finished product may be ground by blasting. In addition, it is also possible to grind a thicker metal plate while leaving a part thereof, and to use it as a weight. With such a weight integrated type, there is no risk of the weight falling off.

[0023]

According to the first aspect of the present invention, there is provided a golf club in which a shaft is provided on a head formed by integrally combining a plurality of metal split shells, wherein at least a part of the split shell has a predetermined thickness by grinding by blast. A golf club characterized by being formed, it is possible to easily adjust the position of the center of gravity by freely adjusting the thickness of the divided shell, and to provide a golf club having a larger head.

According to a second aspect of the present invention, in the golf club according to the first aspect, at least a part of the same surface of the split shell is formed to have different thicknesses by grinding by blast. However, by adjusting the thickness, the weight distribution can be precisely performed in addition to the weight reduction.

According to a third aspect of the present invention, there is provided a method of manufacturing a golf club in which a head is provided with a shaft by integrally combining a plurality of metal split shells, and wherein at least a part of the split shell is adjusted in thickness by blasting. A method of manufacturing a golf club, characterized in that a predetermined thickness can be formed at a predetermined location by grinding a divided shell, so that the shape stability, cost, and strength are lower than those of a chemical treatment. The retention can be excellent.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing one embodiment of the present invention.

FIG. 2 is a perspective view showing one embodiment of the present invention.

FIG. 3 is a partially cutaway front view showing one embodiment of the present invention.

FIG. 4 is an exploded perspective view showing one embodiment of the present invention.

FIG. 5 is a rear view of the face shell showing one embodiment of the present invention.

FIG. 6 is a bottom view of a sole shell / side peripheral shell showing one embodiment of the present invention.

FIG. 7 is a plan view of a crown shell showing one embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 head 7 shaft 11 face shell 12 crown shell 13 sole shell 14 side shell A a B b C c thickness S shot

Claims (3)

[Claims] 1. A golf club having a shaft provided on a head obtained by integrally combining a plurality of metal split shells,
A golf club, wherein a predetermined thickness is formed by grinding at least a part of the split shell by blast. 2. The golf club according to claim 1, wherein at least a part of the same surface of the split shell has a different thickness by grinding by blast. 3. A method of manufacturing a golf club in which a shaft is provided on a head obtained by integrally combining a plurality of metal split shells, wherein at least a part of the split shells is adjusted in thickness by grinding with blast. Golf club manufacturing method.