JP3459792B2 - Wood club head manufacturing method and wood club head - Google Patents

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 metal wood club head having a hollow shell structure called a driver, a spoon, etc. in a golf club, and a wood club head manufactured by this method.

[0002]

2. Description of the Related Art Recent wood club heads have a face member made of a metal having a high hardness and a high hardness such as a titanium alloy in order to increase the flight distance of a hit ball. It has been attempted to make the face thin and bend the face surface at the time of hitting the ball to utilize the repulsive force. Moreover, in order to increase the head speed, the shaft is elongated, and in order to expand the sweet area, the head itself has been made larger in the hollow metal shell structure. Further, in manufacturing such a head, usually, a face member made of a metal material different from that of the head main body excluding the face member forming the face surface is joined by welding to the head main body at the peripheral edge thereof. There is.

[0003]

As described above, a harsh load that causes a large deflection on the face surface at the head speed increased by lengthening the shaft is input to the head, especially on the face surface. As described above, since the head is manufactured by being welded and joined to the opening of the bowl-shaped head main body at the peripheral edge of the face surface, a large strain is generated in the welded portion, and the energy of hitting the ball is reduced. It is assumed that most of them are absorbed by the distortion of the welded portion to reduce the above-mentioned bending of the face surface to reduce the repulsive force of the face surface, and there is a concern that the durability of the welded portion may be reduced. Furthermore, with conventional products, the loft angle, roll, bulge radius, etc. of the head are often not set as designed due to residual distortion and deformation of the welded parts. The reality is that there is a great deal of variation.

In view of such a situation, an object of the present invention is to deform or weld the welded portion of the head, particularly the welded portion of the face.
It is an object of the present invention to provide a method for manufacturing a head that reduces distortion and a wood club head that has excellent flight distance and durability.

[0005]

In order to achieve the above object, the manufacturing method of the present invention is a method for manufacturing a wood club head having a metal hollow shell structure, in which a head body forming a hollow shell is placed in front. on the part shell and the rear shell is divided into two in the direction along the face with each separately manufactured, the front shell
The body is manufactured into a ring-shaped hollow body that opens in the front and back, the face member that constitutes the face surface is joined to the front opening of the front shell, and the front shell is hot formed after joining the face members, A rear shell body having only a front opening is manufactured by forging or casting, and the front opening of the rear shell body is joined to the rear opening of the front shell body. Further, in the wood club head according to the present invention, the head main body forming a hollow shell is divided into two parts in the direction along the face surface into a front shell body that opens front and rear and a rear shell body that opens only the front portion. A ring-shaped hollow body that opens separately to the front shell and is manufactured separately
A wood club head manufactured by separately manufacturing a face member that constitutes a face surface, and joining these three members, wherein a face member is joined to the front opening of the front shell body is hot formed. Then, join the rear opening of the front shell to the front opening of the rear shell manufactured by forging or casting, and set the width from the front edge of the face surface of the head body to the joint between the front shell and the rear shell. The width from the front edge of the face surface of the head body to the rear end of the rear shell is set to ¼ to ⅓.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

In the embodiment shown in the drawings, a method of manufacturing a driver head having a head volume of 280 cc made of titanium alloy and a head manufactured by this manufacturing method will be described.

FIG. 1 shows a state in which a head body 1 forming a hollow shell is divided into a front shell 2 and a rear shell 3 in a direction along a face surface 4 and separately manufactured. . The front shell 2 is open at the front and back, and the face member 5 forming the face surface 4 is joined to the front opening. The front shell 2 to which the face member 5 is joined is hot formed.
The front shell 2 and the rear shell 3 are manufactured into a predetermined hollow shape by forging or casting, and the face member 5 is a plate having a predetermined size by forging, forming, or casting a plate or round bar material. Manufactured into a shape. The front shell 2 is open at the front and back and is manufactured as a ring-shaped hollow body, and the above-mentioned plate-shaped face member 5 is welded and joined to the ring-shaped front opening at its peripheral edge. A hosel 6 is provided on the front shell 2.

In FIG. 2, a front shell 2 in which a face member 5 preheated to about 600 ° C. is joined in a mold 10 having substantially the same shape as the final shape of the product is pressed by a core 11. It is pressed and pressed. The pressure applied at this time was 500 tons. By performing such hot forming, residual strain and deformation generated at the time of welding, which are latent in the welded portion of the peripheral edge of the face member 5, are almost completely removed. Needless to say, such heating temperature and pressing pressure are changed depending on the material of the shell body 2.

After finishing the hot forming as shown in FIG. 2, a pipe-shaped hosel in which a shaft (not shown) is inserted by forming a round hole at one end of the upper surface which becomes the crown of the front shell body 2. 6 is welded to this round hole. Next, the front opening of the rear shell 3 is joined to the rear opening of the front shell 2 by welding or the like.

FIG. 3 shows a cross section of the completed wood club head. The upper surface of the head body 1 formed by joining the front shell body 2 and the rear shell body 3 forms a crown 1A, and the lower surface thereof is a sole 1B.
To form. A joint portion between the face member 5 and the front shell body 2 is indicated by reference numeral 7. Further, the joint portion between the front shell body 2 and the rear shell body 3 is indicated by reference numeral 8. The total width from the front edge of the face surface 4 of the head body 1, that is, the leading edge 4A to the rear end of the rear shell 3 was 87 mm, and the width from the front edge 4A to the center line of the joint 8 was 29 mm. This front edge 4A in full width
The ratio from the width to the center line of the joint 8 is 1/4
It should be set to 1/3 to 1/3. 3 in this example
It was set to 1 /. If the width from the front edge 4A to the joint portion 8 is smaller than a quarter of the total width, the joint portion 8 becomes too close to the face 4, resulting in a large impact at the time of hitting, which is not preferable. Further, if the width to the joint portion 8 is larger than one-third of the total width, various troubles are likely to occur during the hot forming of the front portion of the head, which is not preferable. The face member 5 has a wall thickness of 2.5 m.
m, the thickness of the crown 1A was 1.2 mm, the thickness of the sole 1B was 1.5 mm, and the face height was 45 mm.

[0012]

As described above, according to the present invention, since the front shell to which the face member is joined is subjected to hot forming, the residual strain of the welded portion to which the face member is joined and The deformation is removed and the strength and durability of this part is increased. Therefore, the impact energy at the time of hitting the ball is less likely to be absorbed by the deformation and residual strain of the welded portion of the face member, the deflection of the face surface is increased, and as a result, the repulsive force of the face surface is increased and the ball is strongly repelled. As a result, an increase in flight distance can be obtained. Further, since the hot forming improves the durability of the welded portion between the face member and the front shell, it is possible to further reduce the wall thickness of the face surface and other portions of the head. It is possible to increase the bending of the face surface and increase the repulsive force, and it is possible to increase the size of the head without increasing the weight of the head. Even if a long shaft is attached, the overall weight can be reduced. It is possible to contribute to the improvement of head speed.

The width from the front edge of the face surface of the head body to the joint between the front shell and the rear shell is one quarter to three of the total width from the front edge of the face surface of the head body to the rear end of the rear shell.
With the head set to one-half, the joint part takes a predetermined distance from the striking place, that is, the face surface, the burden of the striking load on the joint part of the front shell and the rear shell is reduced, and the durability of the head is reduced. Improve sex. Furthermore, when welding the joint, the accuracy of loft angle, roll, bulge, etc. is improved due to the reduction of residual strain and deformation of the welded portion.

[Brief description of drawings]

FIG. 1 is a perspective view on the verge of completion of the present invention.

FIG. 2 is an explanatory diagram of hot forming.

FIG. 3 is a sectional view of the completed head.

[Explanation of symbols]

1 head body 2 Front shell 3 Rear shell 4 face 5 Face member 7,8 joint

Continuation of the front page (56) Reference JP 10-71219 (JP, A) JP 8-38655 (JP, A) JP 6-170019 (JP, A) Utility model registration 3013980 (JP, U) ) (58) Fields surveyed (Int.Cl. ⁷ , DB name) A63B 53/04

Claims (4)

(57) [Claims] 1. A wood club head having a hollow metal shell structure.
A method of manufacturing Attach the head body, which is a hollow shell, to the front shell and the rear shell.
Manufactured separately by dividing into two along the surfaceDo
With,Front shell Open back and forthManufactured into a ring-shaped hollow body, Face part that constitutes the face surface in the front opening of the front shell
Join the materials, After joining the face members, hot forming the front shell
Then Manufactured by forging or casting a rear shell that opens only at the front
Then Join the front opening of this rear shell to the rear opening of the front shell.
A method for manufacturing a wood club head characterized by the above. 2. One end of an upper surface which becomes a crown portion of the front shell body.
A round hole is drilled in, and a pipe-shaped hosel is inserted into this round hole.
The woodcracker according to claim 1, which is welded.
Bhead manufacturing method. 3. A head body forming a hollow shell is opened in the front and rear direction.
Face the front shell and the rear shell that opens only at the front.
It is divided into two in the direction along the surface and each is manufactured separately.
ToThe front shell is manufactured into a ring-shaped hollow body that opens in the front and back, The face member that constitutes the face surface is also manufactured separately.
A wood club head made by joining these three members.
I mean Heat the face shell joined to the front opening of the front shell.
Forming for a while, Front of the front shell of the rear shell manufactured by forging or casting
Join the rear openings of the shells, From the front edge of the face surface of the head body to the front shell and the rear shell
The width from the front edge of the face of the head body to the rear
Set to 1/3 to 1/3 of the total width to the rear end of the shell
A wood club head that is characterized. 4. One end of an upper surface which becomes a crown portion of the front shell body.
A round hole is drilled in, and a pipe-shaped hosel is inserted into this round hole.
The welded product according to claim 3, which is manufactured by welding.
Duck club head.