JPS6088570A - Golf club - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a golf club having a hard ball hitting portion in the head.

The main parts of a golf club include a shaft, a grip provided at one end of the shaft, and a head provided at the other end of the shaft. In general, the minimum requirements for a golf club head are (1) to have the strength to withstand an impact, and (2) to have the ability to hit the ball a long distance.

By the way, in recent years, hard two-piece balls have been developed, and since conventional materials are easily deformed or damaged by the impact force on the hitting surface of the golf club, it is desired to develop a ball with impact resistance. ing.

Furthermore, in order to prevent the ball from flying far, it is important to increase the coefficient of restitution upon impact, and from this point of view as well, a ball hitting surface with high hardness is required.

Further, it is preferable that the club heads be placed one after the other, and the flight performance of the ball will vary greatly depending on the position of the center of gravity of the head, the In 4'l moment, the shape of the ball hitting surface, etc. even with the same mold. Therefore, it is important to be able to freely set the club head so that these can be controlled and rolled.
t'r;I'm extremely desirable.

In addition, the l I' lit part of the golf club head is
In addition to the above properties, corrosion resistance is also required due to its usage environment.

However, in conventional golf clubs, the ball-hitting surface is formed with grooves made of metal, carbon cross mat, resin moldings, and the like. Therefore, golf clubs using this type of material may sacrifice the degree of freedom in designing the club head, or the head may be damaged due to low impact strength, or furthermore, the hardness of the ball-hitting surface may be low and the head may be damaged. There were problems in that the ball was easily deformed or damaged, and the flight distance could not be increased.

This invention was made in view of the above circumstances, and its purpose is to obtain a flight distance suitable for a hard ball such as a two-piece ball by using fiber-reinforced metal on the ball hitting surface of a golf club. It is an object of the present invention to provide a golf club which is characterized in that it is designed to prevent deformation, breakage, etc.

Embodiments of the golf club of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 and FIG. 2 each show another form of a golf club.

A grip (not shown) is attached to one end of the shaft 1, and the other end of the shaft 1 is attached to the head 2, and the head 2 has a 1. integrally formed].

In the golf club of the present invention, by determining the characteristics and material of the ball-striking portion 3 of the head 2 as described above, it is possible to increase the flight distance and the lifespan. It is something.

The characteristics of the ball-striking surface of the golf club head of the present invention will be explained below: (1) The hardness is 11 parts 70 or higher on the Rockwell hardness B scale, that is, it increases the coefficient of restitution at the impact of a smooth pole. Therefore, the hardness is 1-1p and above 70, preferably 11gn70 to I
OIJ”r.

This hardness increases the initial ball speed by more than 8.5% compared to conventional materials, and increases ball flight j/lj 1il11. This is the value that extends the .

(2) Is the density 3.0g/cn? be less than or equal to, i.e.

Position of center of gravity of head 2, moment of inertia 1, etc. xv
Lm++J+ +I-rfr'snY+ J-Ja i
l, I-11' ILL! It is desirable that il+i/ha 1N be 3.0 g/cJ or less. Generally speaking, the longer the distance between the ball hitting surface of the club head and the center of gravity, and the greater the moment of inertia, the smaller the rotational angular velocity of the club head, which reduces the reduction in ball initial velocity due to variations in the ball's impact point. It is from. Moreover,
Volume number of ball hitting surface of golf club head ±10~24cJ
For example, titanium (density 4.5g/CI+?) weighs 45~108g, which is 174~1/of the total head weight.
Power that accounts for 2 and gives flexibility in head design~, density 3-0
If the material is less than g/cJ, the mass that can be freely used on the cap will be large.

(3) Corrosion resistance must be at least Class B of the AA standard, that is, it must not corrode at the end of use of a golf club without anticorrosive treatment.

(4) The impact strength is 101 (101 (/c) or more. In other words, the ball-hitting surface of the head is required to have an impact strength of ?ri due to its shape and usage conditions, and in recent years, those made of ceramics have been developed. However, due to the notch effect of the scoring line, it is easily damaged at the impact of the ball, and because it does not break due to the impact of the ball, the impact strength is IOK (H
-cm/d or more is desirable.

Next, the material composition of the ball hitting portion 3 will be explained.

In the case of Example 1, the main components were Macunesium Is: 1 to 5% and zinc 2
An aluminum 11 alloy containing ~4% is used.

In the matrix of the above components, the magnesium and zinc contents (rJt, 3%, 2%) are the lower limit values for keeping the hardness of the ladle part 3 below the required value, and Magnesium 7\ and zinc content 5゜1.4 each
ㅅ, l-1: 41℃ This is the upper limit value to prevent deterioration of properties.

In the case of Example 2, the main components are 4-1:1% silicon and 0.1% magnesium.
An aluminum alloy containing 3-1.0% is used.

In the matrix of the above ingredients, the silicon and magnesium contents of 4% and 0.3%, respectively, are the lower limit values for making the hardness of the ball hitting part 3 more than the required value. 13% and 1%, respectively, are upper limit values to prevent deterioration of impact resistance.

In both Examples 1 and 2, up to 1% of Mn, Cr, and Cu and impurity levels of Fe are contained in the alloy.
It has been found that even if Si is contained, the properties of the material are not deteriorated, and these components may be added as necessary.

A composite material for the golf club head of the present invention is formed by using the main metals described above and the reinforcing materials shown below. In this case, the reinforcing materials are inorganic materials such as alumina, graphite, carbon, and silicon carbide. It is formed of fibers and short fibers including whiskers, and the content thereof is preferably 5.01% to 30V.
o1%. If the content is less than 501%, the contribution to reinforcement will be small, and if it is more than 30Vo1%, the impact resistance of the material will deteriorate. The fibers may be in any form, random, pine-like, woven, or laminated.
It can be used in lt and b, and on the ball hitting surface of the head, it may be distributed uniformly in the thickness direction or unevenly distributed in the surface layer.

The above-mentioned composite material is manufactured by a conventional composite material manufacturing method such as a powder metallurgy method, a compocasting method, a molten metal S-base method, or a semi-molten processing method. Furthermore, after compounding, plastic working methods such as extrusion, rolling, and forging may be used individually.

Next, the results of representative physical properties of the material constituting the ball hitting surface of the golf club head of the present invention are shown in Table 1.
become that way. 1; In A1, 1 to 8 are 11'1' ICs according to the present invention, and 9 to 13 are materials other than this invention that were determined by E1ll11 for comparison.

In the material according to the present invention, which has the above physical properties nIq constant,
Hardness H required for the ball hitting surface of the head.

70 or higher, impact strength of 10 or higher, g-cm/eJ or higher, density of 3.0 g/cut or lower, and good corrosion resistance.

On the other hand, an aluminum alloy that does not use a composite material does not achieve the desired hardness, and titanium, although satisfying the hardness, has a high density and sacrifices flexibility in head design, which is not preferable.

The golf club of the present invention can be obtained by attaching the above-mentioned material to a head 2 made of wood, metal, hardened resin, or the like by screwing, gluing, welding, casting, or the like (see Figs. 1 and 2). reference).

A ball hitting test was conducted to compare the golf club of the present invention formed as described above with golf clubs formed of materials other than the invention, and the results shown in Table 2 were obtained.

In this case, the ball hitting surface of the head was made of various materials using the molten metal forging method, and wooden (persimmon) materials such as those shown in Figure 1 were made.
The one attached to the hitting surface 3 of a golf club head was used. According to the results of this experiment, the flight distance of the ball using the material according to the present invention was 230 m or more, and the distance was 20 m or more than that of the ball using the material of the present invention.
It turned out to be better than 1.

In addition, 1 and 1- similar to the above are o) unmetallurgical method,
It was confirmed that it can be obtained by methods other than molten metal forging, such as semi-molten processing.

As explained above, according to the golf club of the present invention, the 11 balls of the head are made of fiber-reinforced metal.
If you can obtain an appropriate flight distance and improve directionality, you can prevent deformation and damage, etc. (Figure 4L), and increase lifespan (Figure 4L).
Excellent effects such as f can be obtained, and the utility value of (is written by Sa-a).

[Brief explanation of drawings]

Fig. 1 is a perspective view of the main parts showing the first embodiment of the golf club of this invention, Part 2 is a perspective view of the main parts showing the second embodiment of the golf club of this invention, and Table 1 shows the spherical surface of the club spatula 11J. Table 2 shows the results of measuring the physical properties of the constituent H stones, and Table 2 shows the results of the ball batting test 1. In the figure, (1) Shaft 2 Head 3 Ball hitting portion. Patent applicant: Nippon Light Metal Co., Ltd. 10 years old, 10 years old, 4 years old, 5 years old, 5 years old, 4 years old, 4 years old, 4 years old, blind song, 5th N
ασ mol A Re 2 6 sentence stone reprimand test Uma Mawari O 1 use 1. −＊−
+. g＾Convex IIrs 嘗A side L Ichikami Otsuzen each blue Σ type l1 Shi cut length 2 Hitting training test result chome 4-1ki Nikkei Kako Co., Ltd. Uchihira Nikkei Kako Co., Ltd. 1-series sales; ichi+, l 1-':':' (power ceremony) February 22, 1971 Special + t'l Agency Commissioner Wakasugi Kazuta k1' ■, Incident display 1988 Patent application number 1! :l (i 1,'
No. 39 No. 2, Name of the invention Golf club 3, Relationship with the ministry case to be amended ↑￥ 1i', Applicant (Shipping 1' November 1973: N11) 6, Specification subject to amendment i! A brief explanation of the drawings (7, Contents of amendment) [Perspective view of main parts,...
・It is something. ] is corrected as follows. [This is a perspective view of main parts. ”

Claims (1)

[Claims] 1. A golf club comprising a grip, a shaft, and a head, f'l! f ri1! A golf club characterized in that the head has at least a ball-hitting portion made of fiber-reinforced metal. ．． OK +:
・More than cm/cnT, density 3. 911, a highly edible fiber with less than cJ: 1.4' indicates that it is a reinforced metal
1. The golf club according to claim 1, which has the following characteristics. 3. The fiber-reinforced metal is formed of carbon such as alumina and graphite, inorganic long fibers such as silicon carbide, and short fibers containing whiskers, and the content thereof is 5 to 30 Vo1%. The golf club according to claim 1, which has three characteristics. 4. The golf ball according to claim 1, wherein the metal component of the fiber-reinforced metal is formed of an aluminum alloy mainly containing 3 to 5% of magnesium and 2 to 4% of zinc. club. 5. The metal component of the fiber-reinforced metal is mainly silicon 4-
2. The golf club according to claim 1, wherein the golf club is made of an aluminum alloy containing 13% magnesium and 0.3 to 1.0% magnesium.