JP3009833B2 - Metal wood head and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a metal wood head and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, metal wood heads (hereinafter, referred to as metal heads)
Abbreviated as head. )), A sole body was separately molded by a lost wax method to a head body in which a crown part and a hosel part of a head were integrally formed by a lost wax method, fitted to the head body, and integrated by welding. As shown in FIG. 7, a sole member 17 having a face member 15 and a split hosel portion 16 is formed by press working, as disclosed in Japanese Utility Model Publication No. 61-33970.
And separately forming a crown member 18 having a divided hosel portion 16 and a shaft insertion portion 19, and joining these members,
At this time, an L-shaped reinforcing rib 20 for reinforcing the sole member 17 and the face member 15 is used, and is integrated by welding to form a metal wood head main body. So-called four-piece type metal wood head 22 which is attached and bonded together
Is known.

Further, as disclosed in Japanese Utility Model Publication No. 61-33972 shown in FIG. 8, a face member 15, a sole member 17, and a crown member 18 are separately formed by press working, and these members are joined and assembled. In the hosel part 21 formed and integrated by welding, the shaft tip 2
A so-called three-piece type metal wood head 22 to which a single unit 1 is attached and joined is known.

Recently, a metal wood head made of a titanium alloy or an aluminum alloy having a low specific gravity and a high strength has become a boom. Since these titanium alloy metal wood heads are lightweight and strong, the volume ratio of the metal wood head body can be made larger than that of a stainless steel metal head made by the conventional lost wax method. Japanese Unexamined Patent Application Publication No.
Japanese Utility Model Laid-Open No. 6-80455 shown in FIG.
A so-called two-piece type metal wood head and a method for manufacturing these metal wood heads are known. The features of these two-piece type metal wood heads include a face 24 and an extension 2 extending from the face 24 to the rear of the metal wood head.
5 and a hosel portion 26 are integrally formed, and a back-side member 28 joined behind the face-side member 27 is formed by joining the face-side member 27. And a plate-shaped member continuous with the extension portion 25 is formed into a cylindrical shape, and the butted portion is welded.

[0005]

However, these conventionally known metal wood heads have the following problems. That is, by the lost wax manufacturing method, the sole member is separately formed by the lost wax manufacturing method on the metal wood head main body in which the crown part and the hosel part of the metal wood head are integrally formed, joined to the metal wood head main body, and welded. Since the integrated product is a cast product, segregation of the molten metal component, pinholes and other defects during casting are liable to occur, and the crystallinity of the deposited metal material is large. Since the mechanical strength is reduced, it is necessary to increase the thickness of the outer shell itself of the metal wood head constituting the metal wood head in order to improve the durability of the metal wood head. For this reason, the weight of the metal wood head is increased, the volume ratio of the metal wood head is reduced, and the sweet spot cannot be enlarged.

Therefore, in order to solve these problems,
A so-called four-piece type metal wood head as disclosed in Japanese Utility Model Publication No. 61-33970 shown in FIG. 7 is known. In these four-piece type metal wood heads, each member is pressed by pressing. The molding has the advantage that the thickness of the outer shell itself constituting the metal wood head can be reduced, so that the volume ratio of the metal wood head can be increased.

However, since the shaft insert member is welded to the three types of members and the hosel portion is integrally formed by welding, distortion is easily generated in these welded portions, and particularly, the hosel portion is easily deformed. However, there is a problem in that the setting of the important lie angle and loft angle in the metal wood head is deviated. In addition, there is a problem that the welded portion becomes long as a whole, which takes time and effort in the manufacturing process, and increases the manufacturing cost. Further, since it is necessary to pre-mold the three types of members and the shaft insertion member, the number of types of dies increases, the cost of the dies increases, and this is a factor that raises the manufacturing cost.

For this reason, Japanese Utility Model Publication No. 61-339 shown in FIG.
A so-called three-piece type metal wood head 25 disclosed in Japanese Patent No. 72 is known, but in these three-piece type metal wood heads, a metal wood head is formed in order to form each member by press working. Since the thickness of the outer shell itself can be reduced, the volume ratio of the metal wood head can be increased. However, on the other hand, the thickness of the outer shell itself constituting the metal wood head is reduced, and in particular, the thickness of the face member and the crown member is reduced, so that the hitting durability is reduced. Was.

Further, since a short hosel portion is formed by welding three types of members, and furthermore, the shaft tip is inserted and joined, the dimensional accuracy of the hole diameter of the shaft insertion hole opened in the hosel portion varies. When the lie angle, face angle, and loft angle, which are important in a metal wood head, are set, there is a problem that the method of joining and fixing to the tip of the shaft is difficult and irregularity due to clearance fit occurs. In addition, since the welded portions are concentrated on the hosel portion, there is a possibility that physical properties may be deteriorated due to heat history in the hosel portion, and the welding of the hosel portion takes time and effort in the manufacturing process, and the manufacturing cost is high. Had the problem of becoming. Further, since three types of members need to be preformed, the number of types of dies increases, the cost of dies increases, and this is a factor that raises manufacturing costs.

On the other hand, for the purpose of improving the hitting ball durability, a forged metal head such as the metal wood head disclosed in JP-A-5-317467 shown in FIG. 9 and JP-A-6-80455 shown in FIG. Since a part of the material is formed into a plate shape and further bent into a tubular shape to form a hosel part and integrated by welding, the strength of the hosel part tends to vary, and welding of the hosel part is inevitable. Since the difference in hardness between the portion and the non-welded portion was different, there was a possibility that the lie angle slightly changed in a portion where the hardness of the hosel portion was low during repeated hitting.

In addition, in these conventional metal wood heads, it is necessary to increase the volume ratio of the metal wood head, so that the thickness of the outer shell itself of the metal wood head is reduced as a whole. Impact resistance was not sufficient, and further improvement was required. Therefore, it has been desired to supply a metal wood head having good hitting durability and a larger volume ratio.

[0012]

SUMMARY OF THE INVENTION The present invention is directed to a metal wood head invented in order to achieve the above-mentioned object, wherein the metal wood head has a face portion and the entire circumference of the face portion extending rearward from the metal wood head. A face hosel member in which an extending portion extending and a hosel portion having no weld in the axial direction of the shaft are simultaneously and integrally formed by forging, and an extending portion of the face hosel member. And a crown member formed by forging or pressing into a hemispherical shape extending further from the crown portion to the back face portion than the extension portion is arranged, and joined to the crown member and the face hosel member. The forging or plumber has a side wall that is integrally erected from the sole part from the toe part to the lower end of the hosel part of the heel part through the back face part. Molding the sole back face member molded by the scan process, these members are integrally joined, a metal wood head is characterized by being configured by welding the bonding integral portion.

The face hosel member integrally formed by the forging process is formed of a steel material, an aluminum alloy material, a titanium alloy material or the like.
The crown member and the sole back face member,
It can be integrally formed by forging or pressing a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material, or the like.

The method for manufacturing a metal wood head according to the present invention includes a face portion of the metal wood head, an extended portion extending from the entire periphery of the face portion toward the rear of the metal wood head, and a welded portion in the axial direction of the shaft. Having
A pre-face hosel member is integrally formed by forging a material having a shape such as a round bar or a rectangle so that a hosel portion without a hole is simultaneously formed by forging. The face hosel member is formed by trimming, joined to the extension of the face hosel member, and further extended from the crown portion to the back face portion from the extension portion into a hemispherical shape, such as a round bar shape or a rectangular shape. Forming a pre-crown member formed by forging or pressing a material having the shape of the above, and trimming the pre-crown member into a crown member,
The crown member and the face hosel member are joined to form a round bar shape or a rectangular shape in which a side wall portion is integrally erected from a sole portion from a toe portion to a lower end portion of a hosel portion of a heel portion through a back face portion. Forming a presole / backface member formed by forging or press working the material having the material, trimming the presole / backface member into a sole / backface member, joining each of the members, After forming the metal wood head by welding, a process for attaching a shaft to the hosel portion is performed, and a method of manufacturing a metal wood head is possible.

The face hosel member integrally formed by forging according to the method for manufacturing a metal wood head is formed of a steel material, an aluminum alloy material, a titanium alloy material, or the like, while the crown member and the sole are formed. The back face member is a method of manufacturing a metal wood head in which a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material or the like is integrally formed by forging or pressing.

In the metal wood head according to the present invention, the crown member and the sole back face are formed by forging or pressing the face and hosel members formed integrally by forging. It can be formed to be thicker than the thickness of the member, or can have the same thickness.

In the forging process according to the present invention, a round bar-shaped material is hot forged, and in this case, a face hosel member can be formed by a semi-enclosed (burring) forging method. In that case, it can be formed at once by using a finishing die, and it is of course possible to form by using a nail type, a wasteland type, and a finishing die in order. Furthermore, when forming a crown member or a sole / back face member, a plate-shaped material can be hot forged, hot pressed, cold forged, or formed by cold pressing. It is possible. However, in order to prevent springback due to cold working, it is desirable to adopt a method of hot forging or hot pressing.

[0018]

According to the present invention, a face portion of a metal wood head, an extending portion extending from the entire periphery of the face portion toward the rear of the metal wood head, and welding in a shaft axial direction.
In order to use the face hosel member which is formed integrally with the hosel part which has no part by forging at the same time, the hosel part is separately formed like a conventionally known metal wood head, and integrated with other members It has never been said that the hosel is formed by welding after forming into a tubular shape and then welding to form a hosel part, and to the last, the hosel part is formed integrally by forging processing at the same time Therefore, a torsion line of the metal fiber structure is generated, the toughness against tensile stress in the direction of this line increases, and a hosel part with high toughness can be formed. Is not deformed,
There is no danger that the lie angle, face angle or loft angle will be out of order.

Further, the crown member and the face hosel member are joined to each other, and a side wall portion is integrally formed upright from the sole portion from the toe portion to the lower end portion of the hosel portion of the heel portion through the back face portion. A sole / back face member formed by press working is used. Even if the crown member and the sole back face member are formed to be thinner than the face hosel member, the metal member has sufficient strength as a metal wood head. Since it is possible to mass-produce by using and simple press working, productivity is further improved.

Further, in the metal wood head of the present invention, the above members are joined together, and the joints are welded to form a metal wood head, and then a process is performed so that a shaft can be attached to the hosel portion. A metal wood head formed by forming a metal wood head and a method for manufacturing the same, wherein a shaft hole for inserting a shaft may be formed, for example, in order to perform processing so that a shaft can be mounted on the hosel portion. It is also possible to form the over hosel for covering and mounting the shaft by copying. In this way, since the hosel part is forged at the same time by solid processing, the hosel part can be processed after adjusting the lie angle, face angle and loft angle, and vice versa. Since it is also possible to adjust the lie angle, face angle and loft angle after processing the hosel part with the shaft mounting, it can respond to various lie angle, face angle and loft angle. is there.

Further, as a feature of the metal wood head according to the present invention, for example, a face hosel member, a crown member and a sole back face member are formed of a titanium alloy or a pure titanium material as in the embodiments described later. By designing and combining the stiffness, elastic modulus and wall thickness of each material, the mechanical impedance of the finished metal wood head can be harmonized, preventing the uncomfortable feeling of hitting sound and improving the rebound characteristics Becomes

[0022]

1 to 4 show an embodiment of the present invention.
As shown in FIG. 2, a face portion 2 of a metal wood head 1, an extension portion 3 extending from the entire circumference of the face portion 2 toward the rear of the metal wood head, and a welded portion in a shaft axial direction are provided.
The face hosel member 5 is formed by simultaneously forging a hosel portion 4 which is not to be formed, and is joined to the extension portion 3 of the face hosel member 5, and further from the crown portion 6 than the extension portion 3. A crown member 8 formed by forging or pressing into a hemispherical shape extending over the back face portion 7 is disposed, and the crown member 8 and the face hosel member 5 are joined to each other. The sole / back face member 13 formed by forging or pressing is formed such that the side wall portion 11 is integrally formed upright from the sole portion 12 through the hosel lower end portion 4a of the heel portion 10 by passing through the heel portion 10 and these members are joined. A metal wood head 1 in which a golf club metal wood head is formed integrally.

The face hosel member 5 integrally formed by the forging process is formed of a steel material, an aluminum alloy material, a titanium alloy material or the like, while the crown member 8 and the sole back face member 13 are formed.
Is a metal wood head 1 in which a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material or the like is integrally formed by forging or pressing.

As shown in FIGS. 2 to 6, a face 2 of the metal wood head 1 and an extension 3 extending from the entire periphery of the face toward the rear of the metal wood head.
The pre-face hosel member 5a is formed by forging a material 5b having a round bar shape or a rectangular shape so that the hosel portion 4 having no welded portion in the shaft axis direction is simultaneously and integrally formed by forging. Molded together,
The burr 5c of the pre-face hosel member 5a is trimmed to form a face hosel member 5, which is joined to the extending portion 3 of the face hosel member 5, and further back from the crown portion 6 than the extending portion 3. A pre-crown member is formed by forging or pressing a material having a shape such as a round bar or a rectangle into a hemispherical shape extending over the face portion 7, and trimming the pre-crown member to form a crown member 8. Then, the crown member 8 is joined to the face hosel member 5, the toe portion 9 passes through the back face portion 7, and the hosel portion 4 of the heel portion 10 has a lower end 4.
A presole / back face member 13a is formed by forging or pressing a material having a shape such as a round bar or a rectangular shape in which the side wall portion 11 is integrally provided upright from the sole portion 12 over a. After trimming the burr 13b of the back face member 13a to form the sole back face member 13, joining the respective members, welding the joint portion 14 to form a metal wood head, and then attaching the shaft to the hosel portion 4. This is a method for manufacturing a metal wood head 1 characterized in that the metal wood head 1 has been processed so that it can be mounted.

In the method for manufacturing a metal wood head according to the present invention, a method such as profile cutting can be used as a trimming method, and other methods include punching using a punching die of each member shape. Thereafter, methods such as cutting, polishing, trimming, and laser cutting can also be performed efficiently. Further, when the face hosel member 5, the crown member 8, and the sole back face member 13 are formed, a material having a shape such as a round bar or a rectangular shape is forged by a necessary thickness of each member. Can be molded.

The face hosel member 5 integrally formed by forging according to the method of manufacturing the metal wood head 1 is formed of a steel material, an aluminum alloy material, a titanium alloy material, or the like, while the crown member is formed. 8
And the sole / back face member 13 is a method for manufacturing a metal wood head 1 in which a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material, or the like is integrally formed by forging or pressing. is there.

The face hosel member 5, the crown member 8, and the sole / back face member 13 of the present invention.
The following metal materials can be used as the material used in the method. That is, among the steel cord materials, (S25C, S35C, S45C, etc) for carbon steel for machine structures, (SCM440, etc) for chromium molybdenum steel, (SCr440, etc) for chromium steel, and (SMn443, etc) for manganese steel. ), Stainless steel (SUS
304, SUS420J2, SUS630, etc) can be used. As the aluminum alloy material (A20
14, A2017, A2024, 5000-6000 series and A7N01, A7075, etc) can be used. In addition, pure titanium materials and titanium alloy materials (Ti-6
Al-4V, Ti-4Al-22V, Ti-15V-3
Cr-3Al-3Sn, Ti-4.5Al-3V-2F
e-2Mo, Ti-10V-2Fe-3Al, etc)
And the like can be appropriately selected and used.

(Embodiment 1) As an embodiment of the metal wood head 1 of the present invention, FIG.
As shown in (a), the material of the face hosel member 5 is Ti-4Al-22V of titanium alloy material.
Alternatively, when a round bar-shaped material such as Ti-4.5Al-3V-2Fe-2Mo is used and a semi-hermetic (forging) forging is used by hot forging, the ductility is increased as shown in FIG. Because of its good strength, the required shape can be formed by forging, and in that case, the thickness of the face hosel member 5 can be set to about 2.0 mm to about 3.5 mm. desirable. Further, trimming is performed to form the face hosel member 5 shown in FIG. The thickness of the face 2 is about 2.5 mm to 3.0 mm.
About 0 mm is preferable. In addition, it is possible to form a ridge stiffener 2a protruding in the vertical direction on the face portion 2 to reinforce the strength. If the thickness of the face portion is set to be large, the stiffener 2a of these ridges is formed. You don't have to. Further, the material of the crown member 8 and the sole back face member 13 is Ti-4A among titanium alloy materials.
l-22V, Ti-4.5Al-3V-2Fe-2M
If o is used, the required shape can be formed by forging or press working since the ductility is relatively good. In this case, the crown member 8 and the sole / back face member 1
The thickness of about 3 mm can be set to about 0.8 mm to about 2.0 mm, but if the thickness is about 1.0 mm to 1.5 mm, the metal metal wood head 1 maintains durability. You can do it.

In the crown member 8 and the sole back face member 13, the face hosel member 5 described above is used.
Since it is not necessary to have such a high strength, for example, a pure titanium material can be forged or formed into a required shape by press working. In this case, if the thickness of the crown member 8 or the sole back face member 13 is about 1.5 mm to 2.0 mm,
A metal wood head 1 that is satisfactory in terms of durability and weight distribution can be supplied. Furthermore, compared to the above-mentioned titanium alloy material, the pure titanium material is more economical because the raw material cost is lower. As a material of the face hosel member 5, it is of course possible to use a pure titanium material, and of course, a combination of the crown member 8 and the sole / back face member 13 with a pure titanium material is also possible.

(Embodiment 2) As another embodiment of the metal wood head 1 of the present invention, when an aluminum alloy material is used as the material of the face hosel member 5 (A2014, A20)
17, A2024, 5000-6000 series or A
If 7N01, A7075, etc) or the like is used, the required shape can be easily formed by forging because of good ductility and strength. Also, in that case, face
The thickness of the hosel member 5 is about 4.0 mm to about 6.0.
It can be set to about mm. In particular, the thickness of the face portion 2 is preferably about 5.0 mm. Further, the material of the crown member 8 and the sole back face member 13 is an aluminum alloy material (A
2014, A2017, A2020, 5000-600
Use of No. 0's or A7N01, A7075, etc.) is relatively good in ductility, so that the required shape is formed by forging. In that case, the crown member 8 and the sole / back face member 13 are formed. About 2.0m in thickness
m can be set to about 4.0 mm.

Since the sole / back face member 13 does not need to be as strong as the face hosel member 5 described above, for example, an aluminum alloy (A2
014, A2017, etc) or the like, and can be formed into a required shape by forging or pressing. If the thickness of the sole / back face member 13 in this case is about 3.0 mm, a satisfactory metal wood head 1 can be supplied in terms of durability and weight distribution. Aluminum alloy (5000-6000 series or A
7N01, A7075, etc), etc., compared to the above-mentioned aluminum alloys (A2014, A2017, etc)
Such materials are cheaper in terms of raw material costs and are more economical.

(Embodiment 3) As an embodiment of the metal wood head 1 of the present invention, the material of the face hosel member 5 is carbon steel for machine structure (S25C, S35C, S45C, et.
c) and chrome molybdenum steel (SCM440, et.
c), chromium steel (SCr440, etc), manganese steel (SMn443, etc), stainless steel (SUS
304, SUS420J2, SUS630, etc) or the like can be used. In this case, the thickness of the face hosel member 5 is about 2.0 mm to about 3.
It can be set to about 0 mm. In particular,
The thickness of the face portion 2 is preferably about 2.5 mm. Further, as the material of the crown member and the sole back face member, carbon steel for machine structure (S25C, S35C, S45C, etc), chromium molybdenum steel (SCM440, etc), chrome steel (S
Cr440, etc), in manganese steels (SMn44
3, etc), stainless steel (SUS304, SUS4)
20J2, SUS630, etc) or the like can be used. In this case, the thickness of the crown member or the sole / backface member is about 0.5 mm to about 2.0 m.
m, but about 1.0 m
If it has a thickness of mm, it can maintain durability as a metal wood head.

When stainless steel SUS630 is used as the face hosel member 5 and stainless steel SUS630 is used as the crown member and the sole back face member 13, the thickness of the face hosel member 5 is reduced. Is about 1.5 mm to 2.5 mm, and the thickness of the sole back face member 13 is about 1.
The durability can be sufficiently maintained at about 2 mm.

[0034]

As described above, in the metal wood head according to the present invention, the face portion of the metal wood head, the extending portion extending from the entire periphery of the face portion toward the rear of the metal wood head, and the shaft axial direction. With welds
Since the hosel without uses face hosel member formed by co integrally formed by forging, as in the known metal wood head conventionally separately molded hosel portion, other members and so as to be integrally Welding to
It has never been said that a plate-shaped product is processed into a cylindrical shape and then welded, and the hosel is formed by forging at the same time. However, since the hosel portion is not deformed, there is no possibility that the lie angle, the face angle, and the loft angle are deviated, and the hitting durability is remarkably improved.

A crown member is formed by forging or pressing into a hemispherical shape which is joined to the extending portion of the face hosel member and further extends from the crown portion to the back face portion from the extending portion. Since the metal wood heads with various designs can be supplied by appropriately changing the design applied to the surface of the crown member, a mold for the crown member is used. By changing only one, it is possible to respond to the design change, so the mold cost can be reduced,
This has the effect of suppressing manufacturing costs and supplying a cheaper metal wood head.

In the metal wood head according to the present invention, each of the above members is joined, and the joined portion is welded to form a metal wood head. A metal wood head having a head formed therein and a method of manufacturing the same. In order to perform processing so that a shaft can be mounted on the hosel portion, for example, a shaft hole for inserting a shaft may be formed, or a shaft may be formed. It is also possible to form an over hosel for covering and mounting by a copying process. In this way, since the hosel part is formed simultaneously by forging in a solid state, the hosel part can be processed after adjusting the loft angle and lie angle, and conversely, the hosel part Since the loft angle and the lie angle can be adjusted after the shaft is mounted on the portion, it is possible to cope with various loft angles and the lie angle.

In the metal wood head of the present invention, since the thickness of each of the above members can be selected and combined in various combinations, the volume ratio can be increased without reducing the strength of the metal wood head itself. To play.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a metal wood head according to the present invention.

FIG. 2 is a perspective view showing a face hosel member, a crown member, and a sole back face member according to the present invention.

FIG. 3 is a side perspective view showing a face hosel member, a crown member, and a sole / back face member according to the present invention.

FIG. 4A shows a metal wood head according to the present invention;
Sectional drawing which shows the cross section of -A part.

FIG. 5 is an explanatory view showing a manufacturing process of the face hosel member of the metal wood head according to the present invention.

FIG. 6 shows a sole of a metal wood head according to the present invention.
Explanatory drawing which shows the manufacturing process of a back face member.

FIG. 7 is a perspective view showing a conventionally known metal wood head.

FIG. 8 is a perspective view showing a conventionally known metal wood head.

FIG. 9 is a perspective view showing a conventionally known metal wood head.

FIG. 10 is a perspective view showing a conventionally known metal wood head.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 metal wood head 2 face 2 a stiffener 3 extension 4 hosel 4 a hosel lower end 5 face hosel 5 a pre-face hosel 5 b material 5 c burr 6 crown 7 back face 8 crown 9 toe 10 Heel part 11 Side wall part 12 Sole part 13 Sole / back face member 13a Presole / back face member 13b Burr 14 Joint part 15 Face member 16 Split hosel part 17 Sole member 18 Crown member 19 Shaft insertion part 20 Reinforcement rib 21 Shaft tip 22 Metal wood head 23 hosel part 24 face part 25 extension part 26 hosel part 27 face side member 28 back side member 29 metal wood head

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kenji Kanagawa 1-58 Yoshiyuki, Saijo-cho, Higashihiroshima-shi, Hiroshima Prefecture Inside Chuo Kogyo Co., Ltd. (72) Inventor Koji 1-58 Yoshiyuki, Saijo-cho, Higashihiroshima-shi, Hiroshima Examiner, Chuo Kogyo Co., Ltd. Etsuhiko Shin (56) References JP-A-63-154186 (JP, A) JP-A-6-121845 (JP, A) JP-A-5-317466 (JP, A) (58 ) Surveyed field (Int.Cl. ⁷ , DB name) A63B 53/04

Claims (4)

(57) [Claims] 1. A face portion of a metal wood head, an extension portion extending from the entire periphery of the face portion toward the rear of the head, and a hosel portion having no weld portion in a shaft axial direction are forged. A face hosel member formed simultaneously and integrally by processing, and a forging process or a semi-spherical shape joined to the extension of the face hosel member and further extended from the crown to the back face from the extension. A crown member formed by pressing is arranged, and the crown member and the face hosel member are joined to each other. From the toe portion, through the back face portion, to the lower end of the hosel portion of the heel portion, the side wall portion stands upright from the sole portion. Molded sole / back face members formed by forging or press working, and joining and integrating these members,
A metal wood head characterized by being formed by welding the jointed and integrated portion. 2. The method according to claim 1, further comprising a welding portion in the axial direction of the shaft.
The face hosel member formed by integrally forming a hosel portion without forging is made of a steel material, an aluminum alloy material, a titanium alloy material, and the like, while the crown member and the sole back face member are 2. The metal wood head according to claim 1, wherein a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material or the like is integrally formed by forging or pressing. 3. A face portion of a metal wood head, an extension portion extending from the entire circumference of the face portion toward the rear of the head, and a hosel portion having no welded portion in a shaft axial direction are forged. A pre-face hosel member is integrally formed by forging a material having a round bar shape or the like so that it can be simultaneously molded by processing, and the pre-face hosel member is trimmed to form a face hosel member Then, a material having a shape such as a round bar shape in a hemispherical shape which is joined to the extension of the face hosel member and further extended from the crown to the back face from the extension is formed by forging or pressing. The pre-crown member is formed, and the pre-crown member is trimmed to form a crown member.
Joined to the hosel member, forging or pressing a material having a shape such as a round bar with the side wall part standing upright from the sole part from the toe part through the back face part to the hosel lower end part of the heel part A molded presole / backface member was molded, the presole / backface member was trimmed to form a sole / backface member, the above members were joined, and the joint was welded to form a golf club head. A method for manufacturing a metal wood head, wherein the hosel portion is formed by performing a process so that a shaft can be attached to the hosel portion. 4. A face hosel member integrally formed by forging according to the method for manufacturing a metal wood head is formed of a steel material, an aluminum alloy material, a titanium alloy material, or the like, while the crown member is formed. 4. The metal wood head according to claim 3, wherein the sole / back face member is formed by forging or pressing a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material, or the like. Production method.