JPH09135932A - Golf club head and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metallic golf club head with strength and flexibility and capable to increase the carry, by setting a head main body with a hollow inside and an opening at the face attaching part at the rear side of the face member and forming a the wall part on the back side of the face member. SOLUTION: This golf club head comprises a face member 10 to hit a ball and a hollow head main body 13, a plurality of shallow grooves 10a are formed on the surface of the face member 10, and the face member 10 is integrally welded along the face setting part 14. On the back side of the face member 10, a concave lens-like thin wall part 16 is formed on a range to cover parts to collide with a ball frequently. The head main body 12 comprises a top face part 20 almost in a flat plate and a part 22 integrally formed sole part and side periphery part, the top face part 20 is welded with the periphery part of the hollow part 22 and further a pipe 24 for shaft attaching is integrally welded. Centrifugal force of the head speed on hitting and the carry is extended.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal wood golf club head having a metal outer shell.

[0002]

2. Description of the Related Art Conventional so-called metal wood, as disclosed in Japanese Utility Model Publication No. Sho 61-33970, Japanese Utility Model Publication No. 61-33973, etc., is made of a metal, which is formed by joining a plurality of metal shell pieces to one another. The face surface member of the plate was welded. Further, as disclosed in JP-A-5-137818 and JP-A-6-142236, the main body side of the golf club head is integrally formed by plastic working or the like, and a metal plate material is formed in the front opening. A welded face member has been proposed.

[0003]

The face member is a portion to which an extremely large impact is applied, and it is required to have a relatively large strength. In addition, in order to hit the golf ball and fly the ball accurately and distantly, it is necessary to have some flexibility. In particular, the higher the flexibility, the larger the sweet spot on the face surface, and the flight direction of the golf ball. It is stable. Therefore, the face surface is required to have a contradictory performance of high rigidity and flexibility.

The present invention has been made in view of the above problems of the prior art, and provides a metal golf club head having high strength, flexibility, and flight distance, and a method for manufacturing the same. The purpose is to

[0005]

According to the present invention, there is provided a face surface member and a hollow head main body located behind the face surface member and having a face surface mounting portion opened, and the back surface of the face surface member. Further, the golf club head has a thin portion which is thinner than the peripheral portion in a certain area from the center of the face surface. The thin portion is formed in a concave lens shape so as to be continuously thin from the peripheral portion to the central portion. The face surface member is made of various β-type titanium, and the head body is made of various α-type titanium plates.

Further, according to the present invention, there is provided a face surface member and a head main body located behind the face surface member and having a hollow face surface mounting portion. The back surface of the face surface member is formed into a concave lens shape. This is a method for manufacturing a golf club head, in which the face surface member is cut so as to be continuously thin from the peripheral portion to the central portion, and the face surface member is welded and joined to the face surface mounting portion of the head body.

In the golf club head of the present invention, since the peripheral portion on the back surface side of the face member is relatively thick and the central portion is thin, the flexibility of the face member is increased, the speed of the hit ball is increased, and the sweetness is increased. It widens the spot. In addition, since the peripheral portion to which a relatively high bending stress is applied is thick, the strength of the face surface itself can be maintained at a desired value.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. The golf club head of this embodiment includes a face surface member 10 for hitting a ball and a hollow head body 12. Face member 10
Has a plurality of shallow grooves 10a formed on its surface to enhance the strength. The face surface member 10 is the head body 1.
It is welded integrally along the second face attachment portion 14.
Further, on the back surface of the face surface member 10, a thin portion 16 is formed in the shape of a concave lens in a range that covers a portion where a ball often hits.

The head body 12 has a substantially flat upper surface 2
0, the hollow portion 2 in which the sole portion and the side peripheral portion are integrally formed
2, the upper surface portion 20 and the peripheral portion of the hollow portion 22 are joined together and welded. This head body 12
A shaft mounting pipe 24 is integrally welded to the shaft. The shaft mounting pipe 24, as shown,
The lower end portion 24a is welded to the inner surface of the sole portion of the hollow body 22, and the upper portion 24b is also welded to the upper surface portion 20 of the head body 12 and the shaft mounting position of the hollow portion 22. The shaft mounting pipe 24 is formed by hollowing out a titanium rod, and the lower end portion 24a is formed solid and is formed in a pipe shape up to the middle. And
A shaft 26 is fitted and bonded to the shaft mounting pipe 24 to form a golf club.

Since the face member 10 is required to have high strength, it is made of various β-type titanium, and
The head body 12 and the shaft mounting pipe 14 are made of α-type titanium (pure titanium) that is relatively soft and easy to process. As the β-type titanium alloy, Ti-22V-4Al alloy is preferable, and further Ti-13V-11Cr-3Al alloy, Ti-11.5Mo-6Zr
-4.5Sn alloy, Ti-15Mo-3Cr-3Sn-3Al, etc. may be used, and other titanium alloys may be used as appropriate, depending on the performance thereof.

In this golf club head manufacturing method, first, the face member 10 is cold or hot forged and plastically deformed to form a predetermined shape. As the forging method, an appropriate method that is easy to process may be selected. Then, a concave lens-shaped thin portion 16 is formed in a predetermined range from the center of the back surface. The thin portion 16 is cut by an NC machine or the like so that the thickness becomes thinner toward the center. Further, the upper surface portion 20 and the hollow portion 22 are pressed into respective predetermined shapes. Then, the upper surface portion 20 and the hollow portion 22
The head body 12 is formed by welding the peripheral portion of the. Then, the shaft mounting pipe 24 is welded to a predetermined position of the head body 12. The welding points are the lower end portion 24a and the upper portion 24b of the shaft mounting pipe 24. Also, at this time,
The shaft mounting pipe 24 and the face surface member 10 are welded together with the angle accurately set by a jig (not shown). After that, the center-of-gravity adjusting member 28 is welded into the hollow portion 22, and the face surface member 10 is attached to the head body 1.
It welds to the face surface attachment part 14 of No. 2. These weldings can be appropriately selected such as laser welding and electron beam welding. After that, the shaft 26 is inserted into the shaft mounting pipe 24 and fixed with an adhesive or the like.

In the golf club head of this embodiment, since the concave surface lens-like thin portion 16 is formed on the face member 10, for example, a face member having a thickness of 3 mm in the past is about 2 at the center. It is possible to increase the elasticity of the sweet spot of the face member 10 to be wide, and the peripheral portion is formed thick so that the strength can be surely secured. is there. Further, the face surface member 10 becomes lighter, and the head itself can be lightened accordingly.

The golf club head of the present invention is not limited to the above embodiment, but is made of titanium or a titanium alloy.
It can be applied to a golf club head having an appropriate structure, such as a head body integrally formed or a face surface member and a shaft mounting pipe portion integrally provided. The thin portion may be formed by forging instead of cutting.

[0014]

According to the golf club head and the method of manufacturing the same of the present invention, since the wall thickness of the peripheral portion of the face surface is large and the thin portion is formed in the central portion, the flexibility of the face member is high. It simultaneously meets the conflicting requirements for strength. As a result, the golf ball can be made to fly accurately and far away, and the weight of the golf club head can be reduced.

[Brief description of the drawings]

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

FIG. 2 is an exploded perspective view of an embodiment of the golf club head of the present invention.

FIG. 3 is a perspective view of the golf club head of this embodiment.

FIG. 4 is a front view (A) and a cross-sectional view taken along line AA of the face surface member of the golf club head of this embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Face member 12 Head body 14 Face mounting part 16 Thin part 20 Upper surface part 22 Hollow part 24 Shaft mounting pipe

Claims (4)

[Claims] 1. A face surface member, and a head main body located behind the face surface member and having a hollow face surface mounting portion, wherein the face surface member has a central portion of the face surface on the back surface thereof. A golf club head having a thin portion having a certain area and thinner than the peripheral portion. 2. The golf club head according to claim 1, wherein the thin portion is formed in a concave lens shape so as to be continuously thin from a peripheral portion to a central portion. 3. The golf craft head according to claim 1, wherein the face surface member is made of various β-type titanium, and the head main body is formed of various α-type titanium plates. 4. A face surface member, and a head main body located behind the face surface member and having a hollow face surface mounting portion, wherein the back surface of the face surface member is concave lens-shaped from the peripheral portion. A method for manufacturing a golf club head, which is cut so as to be continuously thin toward a center portion, and the face surface member is welded and joined to a face surface attachment portion of the head body.