JPS63290590A - Production of head for golf - 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 [Object of the Invention] (Industrial Field of Application) The present invention relates to a method of manufacturing a golf club head made of a composite material.

(Prior Art) The deeper the depth of the center of gravity of the head, the lower the launch angle, but it can rise significantly from the middle. Even people who are particularly weak can obtain a trajectory commensurate with their number. On the other hand, a head with a shallow center of gravity, that is, a head with the center of gravity closer to the face, will have a higher launch angle, but the distance will not increase even if it goes up high. Especially for weak golfers, it will be difficult to obtain distance. The desirable factor for determining the depth of the center of gravity of the head is mainly the presence or absence of a baracrate; that is, the more the baracrate is attached, the deeper the center of gravity becomes.

As such a head that increases the depth of the center of gravity, Japanese Utility Model Application Publication No. 60-81564 and Japanese Utility Model Application Publication No. 60-81566 are known. In these heads, a head main body having a face and a neck, and a baracrate disposed behind the head main body are manufactured separately by forging, and then the two are integrated by crimping, welding, or the like.

(Problems to be Solved by the Invention) In the prior art, the head body and the baracrate are manufactured by forging, and then the two are fixed together. Furthermore, a mold is required to press the two together, and the manufacturing process involves various forging processes, which increases equipment costs and complicates the process.

The present invention has been made based on the above-mentioned problems, and is directed to a head in which a metal with a light specific gravity is disposed on the face side.
To provide a method for manufacturing a golf club head that can be manufactured using one mold and in one process.

[Structure of the Invention] (Means for Solving the Problems) A metal 10 with a low specific gravity is disposed on the face 2 side, and a composite material 8 in which a plurality of gold EICs 9 and 10 are integrally joined is forged.

(Function) The head 1 is formed by forging the composite material 8 which is made by joining a plurality of metals 9 and 10 together in advance, and there is no need to separately form the head body and baracrate.

(Embodiment) FIGS. 1 to 4 show a first embodiment, in which a head 1
A face 2, which is a ball-hitting surface, is formed on the front side, and a neck 4 having a predetermined lie angle and connected to a shaft 3 is provided on the negative side. Also, on the back side of face 2 is the center of gravity value tG,
A baraclate 5 is provided for balance adjustment. 6 is the sole and 7 is the top.

8 is a clad steel which is a composite material made by bonding multiple metals together, with a stainless steel plate 9 as a base material and a titanium plate 1 as a base material.
0 are superimposed and completely joined by explosive welding, and after cutting into approximately head shapes as shown in Figure 4, they are forged as described below. Explosive welding occurs when gunpowder explodes. It uses powerful energy to join two metal plates. That is, gunpowder is loaded onto the back surfaces of the stainless steel plate 9 and the titanium plate 10, and they are detonated to bring them into close contact with each other, and at the same time, the metal jet emitted at that time causes diffusion on the bonding surfaces of the two, allowing them to be bonded.

Reference numeral 11 designates an upper mold that forms the face 2 side, and 12 represents a lower mold that forms the baracrate 5 side.The molding surfaces 11A and 12A of these pair of molds 11 and 12 form the clad steel 8 into the head shape. Processed.

Next, the operation of the above structure will be explained.

The titanium plate 10 side of the clad steel 8 faces the upper mold 11,
When forging is performed with the stainless steel plate 9 side facing the lower mold 12, the titanium plate 10 forms the face 2 and the neck front part 4A, and the stainless steel plate 9 forms the baracrate 5 and the neck rear part 4B.

After the head 1 is formed by forging in this way, burrs etc. are removed and the neck 4 is provided with the mounting hole 13 of the shaft 3.
to protrude. Then, processing such as grooves 2A and polishing is performed.

As described above, by providing the clad steel 8, which is a combination of the titanium plate 10 and the stainless steel plate 9, between the upper mold 11 and the lower mold 12 and forging, the face 2 of the spatula 1 is formed into a titanium plate 10 with a small specific gravity. By forming the baracrate 5 from a stainless steel plate 9 having a high specific gravity, the center of gravity position G can be lowered to the rear, the depth of the center of gravity can be increased, and the sweet spot can be expanded.

Furthermore, by forging the clad steel 8, which is made by integrally joining the titanium plate 10 and the stainless steel plate 9, in a mold 11, 12 with the titanium plate 10 facing the face 2, the clad steel 8 can be formed by one forging process. Steel 8 directly to head 1
Since it can be formed into the shape of , only one step is required, which simplifies the manufacturing process.

Moreover, the equipment used during forging is an upper die 11 and a lower die 12.
This eliminates the need for the head body, molds, and Kuwait molds. Also, in the neck 4, the front neck portion 4A is formed from a titanium plate 10, while the rear neck portion 4B is formed from a stainless steel plate 9, so that the balance of the neck 4 can also be adjusted.

Other embodiments will be shown below, and the same parts as in the first embodiment will be denoted by the same reference numerals, and detailed explanation thereof will be omitted.

5 to 7 show a second embodiment, and 21 is a composite material in which a titanium plate 22, a stainless steel plate 23, and a copper plate 24 are firmly attached from the face 2 side. , the copper plates 24 are fixed together by friction welding or the like.

In the friction welding, metals are brought into contact and rotated relative to each other while being pressurized, and the heat generated by the friction is used to join the metals.

Therefore, by forging with the titanium plate 22 facing the upper mold 11 side and the copper plate 24 facing the lower mold 12 side, the face 2 is formed of the titanium plate 22, and the baracrate 5 is formed of the copper plate. 24 and by arranging the stainless steel plate 23 in the middle, the center of gravity G can be located further rearward and the depth of the center of gravity can be increased.

Furthermore, the head 1 includes a titanium plate 22, a stainless steel plate 23,
By adopting the 3R structure of the copper plate 24, the balance of the head 1 can be finely adjusted.

FIG. 8 and FIG. 9 show the third embodiment, in which the top 7
An upper mold 11 and a lower mold are made of a composite material 33 to which are fixed an aluminum plate 31 with a thick wall on the side and a thin wall on the sole 6 side, and a lead plate 32 with a thin wall on the top 7 side and a thick wall on the sole 6 side. 12, the face 2 is formed of an aluminum plate 31, while the back weight 5
By forming the lead plate 32, the depth of the center of gravity can be increased.

Furthermore, by making the aluminum plate 31 of the composite material 33 thinner on the sole 6 side, and the lead plate 32 thicker on the sole 6 side, the center of gravity G of the forged head 1 is placed at a lower position. Because of this, it is possible to provide a helad 1 with a large center of gravity and a low center of gravity.

It should be noted that the present invention is not limited to the above-mentioned embodiments; for example, the composite material may be a combination of a metal with a lower specific gravity and a metal with a higher specific gravity, and the metals of the composite material may be welded together by the above-mentioned explosion welding.

In addition to friction welding, ultrasonic welding, cold pressure welding, pressure welding methods that apply heat, pressure, or impact force to the joint to permanently deform the joint, and adhesive bonding to the extent that the metals do not separate during forging. It is acceptable as long as you have
As shown in the figure, various modifications are possible, such as making the baraclate 5 thicker near the top 7 and setting the center of gravity ritG higher.

[Effects of the Invention] The present invention allows the head to be formed in one forging process by forging a composite material in which different metals are integrated in advance so that the metal with a lower specific gravity forms the face, thereby simplifying the manufacturing process. Also, the head body and baracrate mold can be omitted.

[Brief explanation of the drawing]

1 to 4 show the first embodiment, FIG. 1 is a perspective view, FIG. 2 is a sectional view taken along the line I-■ in FIG. 1, and FIG. 3 is a vertical sectional view of the mold. Figure 4 is an exploded perspective view, Figures 5 to 7
The figures show the second embodiment, FIG. 5 is a side view, FIG. 6 is a perspective view, FIG. 7 is a vertical cross-sectional view of the composite material, and FIGS. 8 and 9 show the third embodiment. 8 is a longitudinal sectional view, FIG. 9 is a longitudinal sectional view of the composite material, and FIG. 10 is a longitudinal sectional view of another embodiment. 2... Face 8... Clad steel (composite material) 21, 33... Composite material

Claims (1)

[Claims] A method for manufacturing a golf club head, characterized in that a metal with a low specific gravity is disposed on the face side, and a composite material in which a plurality of metals are joined together is forged.