JP4485022B2 - Golf club head - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to golf club heads, and more particularly those that relate to golf club heads of the hollow form of metal.
[0002]
[Prior art]
Generally, a balance weight of a golf club head is attached as a retrofit by welding, brazing or caulking to the sole. However, such a conventional fixing method has a problem that the balance and the joint are loosened due to repeated vibrations, shocks, etc., and the balance weight is removed from the sole, and the processing at the time of attachment is complicated.
[0003]
In addition, in a metal hollow golf club head, since a balance weight is arranged in the head, there is a limit in setting the head to a low center of gravity.
[0004]
[Problems to be solved by the invention]
Accordingly, the present invention, the balance weight to the sole is attached firmly, repeatedly receives vibrations, intended to provide a golf club heads without departing due impact, further, hollow metal golf club head in even lower center of gravity it is performed, and an object thereof is to provide a golf club heads having superior performance.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a golf club in which a metal hollow golf club head is integrally joined to a face portion, a crown portion and a sole portion, and a balance weight portion is embedded in the sole portion. In the head, the sole portion is formed from a rapidly solidified alloy, and a housing portion for accommodating the balance weight portion is formed in one of the sole portion forging materials of the two sole portion forging materials forming the sole portion, In the material for forging the sole part, a projection part that fits into the accommodation part is formed, and the sole part is formed by forging with the projection part in contact with the balance weight part accommodated in the accommodation part. is there.
[0006]
In the present invention, the balance weight portion is any one of tungsten and its alloy, molybdenum and its alloy, copper and its alloy, or cemented carbide.
[0007]
Further, according to the present invention, the balance weight portion is embedded in the bottom surface side of two sole portion forging materials.
[0008]
Furthermore, the present invention uses an aluminum-based alloy material as the rapidly solidified alloy.
[0009]
In the present invention, the forging reduction ratio at the time of forming the sole portion is 50% or more.
[0010]
Main body portion or sole portion, a titanium alloy, aluminum alloy or stainless steel, balance weight is, tungsten and alloys thereof, may be any of molybdenum and its alloys, copper and its alloys or cemented carbide.
[0011]
In the thickness of the body portion or sole portion, a low center of gravity in the balance weight portion is disposed on the outer surface.
[0012]
As in the present invention, the balance weight portion is accommodated in the accommodating portion formed in the material of one sole portion, and the protruding portion formed in the material of the other sole portion is fitted into the accommodating portion to forge both materials. By forming the sole portion by molding, the balance weight portion can be prevented from being displaced during forging, and the balance weight portion can be appropriately disposed at the assumed position of the sole portion. In particular, when a storage portion and a protruding portion are provided and these are fitted, it is possible to prevent misalignment in manufacturing.
[0013]
Furthermore, when aiming at a lower center of gravity, it is preferable that the storage portion is provided on a member on the outer side of the sole portion of the two members of the sole portion forging material. By doing in this way, a balance weight part is embed | buried under the sole part bottom face side of a golf club head. It is preferable that the forging reduction ratio from the forging material to the molded body (sole part) be 50% or more. This is because when the forging reduction ratio is less than 50%, the sole portion and the balance weight portion forging materials cannot be integrated with each other, and the sole portion forging materials composed of two members cannot be sufficiently integrated.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIG. 1, a golf club head 1, particularly a metal hollow golf club head 1, includes a face portion 2, a crown portion 3, and a sole portion 4, and is formed by integrally joining them. . In FIG. 1, the hosel portion 5 is formed integrally with the face portion 2, but these may be used as separate parts. Moreover, about the crown part 3 and the sole part 4, these may be integrated and it may be set as a main-body part. Although the balance weight portion 11 (see FIG. 4) is not shown, it is embedded in the sole portion 4 in FIG. The golf club is formed by mounting a shaft on the hosel portion 5 of the golf club head 1.
[0016]
As a material used for the sole portion of the present invention, a titanium alloy, an aluminum alloy, stainless steel, or the like can be applied, and a non-equilibrium alloy such as titanium or aluminum can also be used. The non-equilibrium phase alloy refers to an alloy composed of an amorphous phase, a fine crystalline phase, a quasicrystalline phase, or a mixed phase thereof, and these alloys can be obtained by rapid solidification such as a liquid quenching method. A particularly useful rapidly solidified alloy is an aluminum-based alloy of the system represented by the following general formula.
[0017]
Formula (I) AlaMb
(II) AlaMbXc
In the general formula (II), an aluminum group alloy system represented by the following general formula is a particularly preferable example.
(III) AlaM1dXc
(IV) AlaM1 (d-e) M2eXc
(V) AlaM1 (df) M3fXc
(VI) AlaM1 (d-ef) M2eM3fXc
[0018]
(However, M: Mn, Fe, Co, Ni, Mo, V, Cr, W, Li, Ca, Mg, Si, Cu, Zn, X: Nb, Hf, Ta, Y , Zr, Ti, Ag, a rare earth element and at least one element selected from an aggregate of rare earth elements (Mm: Misch metal), M1: at least one element selected from Mn, Fe, Co, Ni, Mo, M2: at least one element selected from V, Cr, W, M3: at least one element selected from Li, Ca, Mg, Si, Cu, Zn, a, b, c, d, e, f In atomic percent (at%), a is the balance, 0.5 ≦ b ≦ 25, 0.5 ≦ c ≦ 10, 0.5 ≦ d ≦ 15, 0.1 ≦ e ≦ 5, 0.5 ≦ f ≦ 5)
[0019]
Further, the material can be applied to the face portion and the crown portion other than the sole portion as in the case of the sole portion. As for the face portion, it is preferable to use a non-equilibrium phase alloy when considering strength, and when considering further weight reduction, it is particularly preferable to use an aluminum-based rapidly solidified alloy represented by the above general formula. preferable.
[0020]
Furthermore, when considering the characteristics and economy as a golf club head comprehensively, the face portion uses an aluminum-based rapidly solidified alloy as described above, and the crown portion and the sole portion or the main body portion are made of an existing titanium alloy or aluminum alloy. Alternatively, it is particularly preferable to use stainless steel or the like. An existing alloy will be described by taking an aluminum alloy as an example. As the existing aluminum alloy, JIS 5052, JIS 6061, JIS 5083, JIS 7075, JIS 2017, JIS 2024 aluminum alloy and the like are preferably used, and as the existing titanium alloy, Ti-6Al-4V (the balance is Ti And the numerical value is weight percent wt%.) A titanium alloy or the like is preferably used.
[0021]
On the other hand, as a material used for the balance weight part of the present invention, tungsten and its alloy, molybdenum and its alloy, copper and its alloy, cemented carbide, or the like can be applied. These alloys have high specific gravity and are used as balance weights for golf club heads, and there is no particular problem when applying the manufacturing method of the present invention described later. In particular, a copper alloy is particularly useful when considering the production surface according to the production method of the present invention. Specifically, pure copper 1100, Cu—Zn alloy (brass), and the like are effective.
[0022]
The golf club head of the present invention can increase the size of the head by selecting the material of each component as described above, and improving the performance and reducing the weight. Further, the balance weight portion can be made thicker at the sole portion. The center of gravity can be lowered by embedding it inside. In order to lower the center of gravity, it is more important to arrange the sole so as to be closer to the outer surface side in the meat pressure of the sole portion.
[0023]
The golf club head manufacturing method of the present invention will be specifically described below.
In the manufacturing method of the present invention, the face part, the crown part, and the sole part, which are components of the golf club head, are produced by forging each forging material into a final shape. The manufacturing method of each part differs depending on the material used. When existing materials are used, the forging material can be produced by casting, extruding, powder forging, or the like, and further processing these materials as necessary. When a material made of a rapidly solidified alloy is used, for example, it is prepared as a powder by an atomizing method, etc., filled in a can and extruded, and the resulting extruded material is cut into a predetermined size for forging. A material can be produced.
[0024]
As for the manufacturing method of the sole portion 4 which is a feature of the present invention, for example, as shown in FIG. 2, a sole portion forging material 6 is produced with two members, and a balance weight portion forging material 7 is arranged between the two members. In this state, it can be produced by performing forging to obtain the final shape of the sole portion 4. In addition, as a method of manufacturing the forging material 9 other than the above, forging is performed by casting or extruding so that the balance weight portion 11 is arranged inside, and forging into the final sole portion 4 shape. Can also be produced. Since the positional relationship of the balance weight portion 11 in the sole portion 4 is important in the case of the final golf club head 1, at least one of the two members of the sole portion forging material 6 is stored for positioning. It is preferable to form the portion 8, and in particular, as shown in FIG. 3, the storage portion 8 is formed on one side, and the protruding portion 10 is formed on the other side. It is preferable to arrange a weight part 11 so that the storage part 8 and the protruding part 10 are fitted. By doing in this way, at the time of forge, the position shift of the balance weight part 11 can be prevented, and the balance weight part 11 can be appropriately disposed at the assumed position of the sole part 4. In particular, when the storage portion 8 and the protruding portion 10 are provided and are fitted, it is possible to prevent misalignment in manufacturing. Furthermore, when aiming at a lower center of gravity, it is preferable that the storage portion 8 is provided on a member on the outer side of the sole portion 4 of the two members of the sole portion forging material 6. By doing so, the balance weight portion 11 is embedded on the bottom surface side of the sole portion 4 of the golf club head 1. In addition, about the manufacturing method of the balance weight part forging material 7, it is the same as that of the case where the said face part 2, crown part 3, and sole part 4 are produced using the existing material.
[0025]
Furthermore, in the forging of the forging material for the sole part and the balance weight part, the forging reduction rate from the forging material to the formed body (sole part) is preferably 50% or more. This is because when the forging reduction ratio is less than 50%, the sole portion and the balance weight portion forging materials cannot be integrated with each other, and the sole portion forging materials composed of two members cannot be sufficiently integrated. Further, depending on the material, heat treatment may be performed after forging or after being integrally formed on the golf club head. In such a case, the thickness of the balance weight portion forging material should be 20% or less of the total thickness of the forging material at the stage of producing the sole portion and balance weight portion forging material. This is because a difference in thermal expansion occurs between different materials due to heat treatment, and a gap is likely to occur between the sole portion and the balance weight portion, which may lead to poor appearance and further peeling of the material. It is.
[0026]
Although the present invention has been described mainly with respect to hollow golf club heads, particularly wood type golf club heads, the present invention can also be applied to iron type golf club heads. Generally composed of a face portion and a main body portion, and by embedding a balance weight portion in the vicinity of the bottom surface portion of the main body portion, the same effect as that of a hollow golf club head can be expected, and the manufacturing method thereof is also described above. It can be performed in the same manner as the production of the head.
[0027]
【Example】
EXAMPLES Hereinafter, although this invention is demonstrated concretely based on an Example, it cannot be overemphasized that this invention is not limited to the following Example.
[0028]
1. A rapidly solidified aluminum alloy powder made of Albal.Cu _0.7 Mg _4.0 Zn _4.7 (at%) fine crystalline material was prepared by face atomizing gas atomization, and this was filled in an extrusion can and extruded to produce an extruded material. . The obtained extruded material was cut into a predetermined size and subjected to various processes as necessary to produce a face forging material. The obtained face portion forging material was placed in a face portion forging die, and the face portion was formed by forging.
[0029]
2. Production of Crown Part An extruded material made of an existing JIS 6061 aluminum alloy was cut into a predetermined size and subjected to various processes as necessary to produce a crown part forging material. The obtained crown portion forging material was placed in a crown portion forging die and forged to form a crown portion.
[0030]
3. Production of sole part Extruded material made of existing JIS 6061 aluminum alloy was cut into predetermined dimensions, subjected to various processing as necessary, a pair of members were prepared, and a storage part was formed by drilling on one side of one member . In this way, a sole portion forging material was produced. In addition, the thickness of each member for sole part forging material is 6 mm, and the magnitude | size of the accommodating part is processed according to the magnitude | size of the balance weight part mentioned later.
[0031]
Further, a rolled plate made of pure copper (Cu) having a thickness of 2 mm was punched and further subjected to various processes as necessary to produce a balance weight portion forging material having a predetermined size.
[0032]
Next, as shown in FIGS. 2 and 3, the balance weight portion forging material 7 is placed in the storage portion 8 of the sole portion forging material 6, and the balance weight portion forging material 7 is paired with the sole portion forging. The forging material 9 was made to be sandwiched between the forging material 6. The total thickness of the forging material 9 is 12 mm.
[0033]
The forging material 9 produced in this way was placed in a forging die for forming the sole portion 4 and subjected to forging to form the sole portion 4 as shown in FIG. The maximum thickness of the molded sole portion 4 was 3 mm, and the forging reduction ratio was considered to be 50% or more in consideration of joining between the respective members during forging.
[0034]
4). Golf club head production A golf club head was prepared by welding the face part, crown part and sole part thus obtained. The produced golf club head was light in weight, large in head size, and low in the center of gravity.
[0035]
【The invention's effect】
By embedding the balance weight part in the main body part including the sole part, the balance weight part can be firmly attached to the main body part and balanced from the main body part due to vibration, impact, etc. repeatedly received in actual use. It is possible to provide a golf club head and a manufacturing method thereof in which the weight portion does not come off.
In addition, by making the balance weight part in the main body part including the sole part, it is possible to lower the center of gravity compared to the conventional case, and the flying distance by spin control increases with the lowering of the center of gravity, and the hitting ball suddenly stalls. It is possible to provide a golf club head and a method for manufacturing the golf club head with more excellent performance that it is less likely that a wrinkled locus will occur and the sweet area is expanded.
[Brief description of the drawings]
FIG. 1 is a perspective view of a golf club head of the present invention.
FIG. 2 is an exploded perspective view showing each material of a sole part of a golf club head to which the present invention is applied.
3 is a cross-sectional view showing a state in which each material shown in FIG. 2 is incorporated.
FIG. 4 is a cross-sectional view showing a sole portion of the golf club head of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Golf club head 2 Face part 3 Crown part 4 Sole part 5 Hosel part 6 Sole part forging material 7 Balance weight part forging material 8 Storage part 9 Forging material 10 Protrusion part 11 Balance weight part

Claims (5)

A golf club head in which a metal hollow golf club head is integrally joined to a face portion, a crown portion, and a sole portion, and a balance weight portion is embedded in the sole portion.
Forming the sole portion from a rapidly solidified alloy;
Forming an accommodating portion for accommodating a balance weight portion in one sole portion forging material among the two sole portion forging materials forming the sole portion;
Forming a protrusion that fits into the housing portion in the other sole portion forging material,
A golf club head characterized in that a sole portion is formed by forging with the protruding portion contacting a balance weight portion accommodated in the accommodating portion . 2. The golf club head according to claim 1, wherein the balance weight portion is any one of tungsten and an alloy thereof, molybdenum and an alloy thereof, copper and an alloy thereof, or a cemented carbide. 3. The golf club head according to claim 1, wherein the balance weight portion is embedded on the bottom surface side of two sole portion forging materials. 4. The golf club head according to claim 1, wherein an aluminum-based alloy-based material is used as the rapidly solidified alloy. 5. 5. The golf club head according to claim 1, wherein a forging reduction rate at the time of forming the sole portion is 50% or more.

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