JPH06170019A - Production of golf club head - Google Patents

Abstract

(57) [Abstract] [Purpose] The volume of the portion that must be cast can be made as small as possible, and the number that can be cast in one mold can be increased, which can greatly reduce the manufacturing cost. An object of the present invention is to provide a method of manufacturing a golf club head that can be manufactured. [Structure] A part to be molded by casting is limited to a head front part 1 including a face part 3 and a neck part 5 which are complicated in shape and need strength, and the volume of the cast part is reduced to thereby form a single mold. In addition to increasing the number that can be cast, the other portion (the rear portion of the head) 8 that has a simple shape and does not require much strength is formed by forging or pressing.

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 hollow metal golf club head made of titanium, titanium alloy, stainless steel or the like.

[0002]

2. Description of the Related Art Conventionally, in golf clubs, the head of a driver or the like is made of wood, and a metal plate is attached to the sole surface of the wooden head, and a resin or other insert is attached to the face surface for reinforcement. It was However, in recent years, golf clubs such as drivers that have a metal or alloy head called metal wood (hereinafter referred to as metal wood) have also appeared, and this metal wood extends the flight distance of the hit ball and hits with accurate directionality. It is easy and gradually replacing golf clubs such as drivers with wooden heads.

In recent years, various metal woods have been proposed which have excellent repulsive force and corrosion resistance among metals or alloys and which have a light titanium or titanium alloy head. Among these, the applicant has produced most of the titanium or titanium alloy head having a small opening and a cavity by precision casting, and then fixing a balance weight from the opening into the cavity. Proposes a head obtained by sealing the opening with a titanium or titanium alloy lid manufactured by press working (see Japanese Patent Application No. 1-187155). This head has a short weld bead length for sealing the small opening, so that there are few welding defects and residual strain, and there is also little post-welding treatment for grinding and polishing the weld bead and titanium or The repulsive force of the titanium alloy can be fully exhibited.

[0004]

By the way, the precision casting method used for molding most of the head having the small opening and the cavity has many steps and is complicated. Since the volume of the casting part is large, the number of parts that can be connected to the runner part as one mold is limited, so the number that can be cast with one mold is small,
It was not always advantageous in terms of manufacturing cost.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to reduce the volume of the portion that must be cast as much as possible and to cast in one mold. It is an object of the present invention to provide a method for manufacturing a golf club head, which can increase the number of products and can significantly reduce the manufacturing cost.

[0006]

In order to achieve the above object, the first aspect of the present invention is a method for manufacturing a golf club head comprising a plurality of divided members, the face portion and the neck portion. While the front part of the head including the above is cast, the rear part of the head facing the front part of the head is formed by forging or pressing, and the front part of the head and the rear part of the head are joined by welding. Further, a second aspect of the present invention is a method for manufacturing a golf club head composed of a plurality of divided members, in which the front part of the head main body including the face part and the neck part is cast, The head main body rear part and the sole part facing each other are respectively formed by forging or pressing, and the head main body front part, the head main body rear part and the sole part are joined by welding.

[0007]

According to the first aspect of the method of manufacturing the golf club head of the present invention, the portion to be molded by casting is limited to the head front portion including the face portion and the neck portion which have complicated shapes and require strength. By reducing the volume of the casting part, the number of parts that can be cast in one mold is increased, and the other parts (rear part of the head) that are simple in shape and do not require much strength are forged or pressed. Mold. Further, according to claim 2 of the present invention, the portion to be molded by casting is limited to the front portion of the head main body composed of the face portion and the neck portion which are complicated in shape and need strength, and the volume of the cast portion is reduced. By doing
In addition to increasing the number that can be cast in one mold, the rear part of the head body and the sole part, which have a simple shape and do not require much strength, can be molded more easily by forging or pressing. At the same time, when a logo or the like is formed on the outer surface of the sole portion, it can be formed smoothly.

[0008]

Embodiments of the present invention will be described below with reference to FIGS.

1 and 2 show a first embodiment of the present invention. In these drawings, reference numeral 1 is a front portion of a metal wood head. The front part 1 of the head is made of a titanium alloy such as "T" which is hollow inside a precision casting mold made of alumina.
It is manufactured by injecting a molten metal of "i-6% Al-4% V (above wt%)" and vacuum casting. The head front portion 1 is formed with a face portion 3 having a face surface 2, a neck portion 5 having a shaft hole 4, and a front side portion of the sole portion 6, respectively. An opening 7 is formed on the rear side. The alumina precision casting mold is formed by the lost wax method, that is, first, a wax molded product having the same shape as the head front part 1 is molded, and a plurality of the wax molded products are connected to the runner part to form a tree shape. After assembling to form a coating layer by alternately depositing slurry and refractory particles on the surface of the tree-shaped assembly, drying the coating layer, and further heating to remove the wax in the coating layer. It is produced by. On the other hand, the head rear portion 8 having a shape and size corresponding to the opening 7 is made of a plate-shaped titanium or titanium alloy (a pure titanium plate in this embodiment) and is made of a metal having a size corresponding to the opening 7. It is formed by press molding using a mold. The head rear portion 8 includes the back 9, the crown 10 and the sole portion 6
It is composed of most of. In addition, the head rear portion 8
May be formed by forging.

Next, in a state in which the head portion 1 precision-cast as described above and the head rear portion 8 press-molded are joined together, they are joined by arc welding, and then the outer surface of the welding bead is ground. Get the head. In this way, by limiting the portion to be molded by precision casting to the head front portion 1 including the face portion 3 and the neck portion 5 which have complicated shapes and require strength, the volume of the casting portion is reduced, The number that can be cast in one mold can be increased, and the other portion (rear portion of head) 8 that has a simple shape and does not require much strength can be easily manufactured by molding by pressing or forging. The productivity can be greatly improved.

FIGS. 3 and 4 show a second embodiment of the present invention, in which the head front portion 1 and the head rear portion 8 are straddled in the first embodiment. The sole portion 6 is press-formed from a pure titanium plate as another member. That is, in the second embodiment, while the head main body front portion 11 including the face portion 3 and the neck portion 5 is precision-cast, the head main body rear portion 12 and the sole portion 13 facing the head main body front portion 11 are respectively After forming by forging or pressing, the head body front portion 11, the head body rear portion 12, and the sole portion 13 are joined by welding. Thereby, the same effect as that of the first embodiment can be obtained, and in the first embodiment, the logo is formed on the sole surface of the sole portion 6 while straddling the head front portion 1 and the head rear portion 8. Alternatively, when a pattern or the like is applied, the problem that the logo or pattern is easily displaced during welding, or when an attempt is made to engrave after welding,
Since the head front portion 1 and the head rear portion 8 are made of different materials, it is possible to avoid the problem that marking is difficult.

Further, FIGS. 5 and 6 show a third embodiment of the present invention. In this figure, the head rear portion 8 of the first embodiment is divided into upper and lower parts and two members are made of pure titanium. The plate is press-molded and the two members constituting the head rear portion 8 and the head front portion 1 are joined by welding. Furthermore, FIGS. 7 and 8 show a fourth embodiment of the present invention.
The head body rear part 12 of the embodiment is divided into upper and lower parts and press-molded from a pure titanium plate as two members, and the two members constituting these head body rear parts 12 and the head body front part 11 are joined by welding. It is a thing.

[0013]

As described above, according to the first aspect of the present invention.
Is a method for manufacturing a golf club head composed of a plurality of divided members, in which a head front portion including a face portion and a neck portion is cast, and a head rear portion facing the head front portion is forged or pressed. Since the front part of the head and the rear part of the head are joined by welding, the part formed by casting is limited to the front part of the head including the face part and the neck part, which have complicated shapes and need strength. By reducing the volume of the casting portion, the number of pieces that can be cast in one mold can be increased, and for the other portion (the rear portion of the head), which has a simple shape and does not require much strength, forging or pressing. By molding with, it is easy to mold and the moldability can be improved. Therefore, both of them work together,
The productivity can be improved and the manufacturing cost can be significantly reduced. Further, claim 2 of the present invention is
A method of manufacturing a golf club head composed of a plurality of divided members, wherein a head main body front portion including a face portion and a neck portion is cast, and a head main body rear portion and a sole portion facing the head main body front portion. Are formed by forging or pressing, and the front part of the head body, the rear part of the head body, and the sole part are joined by welding. Therefore, the part to be formed by casting is a face with a complicated shape and strength. By limiting the volume of the casting part to the front part of the head body consisting of the head and neck, the number of pieces that can be cast in one mold can be increased, and the shape is simple and does not require much strength. The head body rear part and sole part can be molded more easily by molding by forging or pressing. It is possible, in the case of forming a logo or the like on the outer surface of the sole portion can be smoothly formed.

[Brief description of drawings]

FIG. 1 is a sectional view of a golf club head showing a first embodiment of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a sectional view of a golf club head showing a second embodiment of the present invention.

FIG. 4 is a plan view of FIG.

FIG. 5 is a sectional view of a golf club head showing a third embodiment of the present invention.

FIG. 6 is a plan view of FIG.

FIG. 7 is a sectional view of a golf club head showing a fourth embodiment of the present invention.

FIG. 8 is a plan view of FIG.

[Explanation of symbols]

 1 head front part 3 face part 5 neck part 8 head rear part 11 head main body front part 12 head main body rear part 13 sole part

Claims (2)

[Claims] 1. A method of manufacturing a golf club head comprising a plurality of divided members, wherein a head front portion including a face portion and a neck portion is cast, and a head rear portion facing the head front portion is cast. A method for manufacturing a golf club head, characterized by molding by forging or pressing, and joining the front part of the head and the rear part of the head by welding. 2. A method of manufacturing a golf club head comprising a plurality of divided members, wherein a head body front portion including a face portion and a neck portion is cast, and the head body front portion is opposed to the head body front portion. A method for manufacturing a golf club head, characterized in that the main body rear part and the sole part are respectively molded by forging or pressing, and the head main body front part, the head main body rear part and the sole part are joined by welding.