JPH08266690A - Metal wood head and its manufacture - Google Patents

Abstract

PURPOSE: To enhance the durability of a metal wood head against hitting balls and to increase the volumetric percentage of the head by using a face crown member in which a face, a crown, and a hosel are molded integral with one another by forging. CONSTITUTION: This metal wood head is formed by joining and integrating a face crown member 6 and a sole backface member 11 together. The face crown member 6 is formed by molding a face 2, a crown 3 extending rearward from the upper part 2a of the face, a heel 4, and a hosel 5 integral with one another by forging. A side wall part 9, extending from the heel 4 of the face 2 to the toe 7 through a leading edge 2b and then passing through the backface part to fit the shape of an edge pointed to the lower end 5a of the hosel, is placed upright on the sole backface member 11. The portion of the sole backface member 11 corresponding to the face 2 is hollowed out, and a sole 10 is provided therein and is molded integral with the side wall part 9 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 improvements in a metal wood head and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, as a metal wood head, a sole member is separately molded by a lost wax manufacturing method to a metal wood head body integrally molded with a crown portion and a hosel portion of the metal wood head by a lost wax manufacturing method. , Which is joined to the main body of the metal wood head and integrated by welding, or as shown in FIG.
As disclosed in Japanese Patent No. 3970, the face member 12, the sole member 14 having the divided hosel portion 13, the crown member 15 having the divided hosel portion 13, and the shaft insertion portion 16 are separately molded by press working, and these members are The L-shaped reinforcing rib 17 for reinforcing the sole member 14 and the face member 12 at the time of joining,
A so-called four-piece type metal wood head 19 is known in which a metal wood head body is integrated by welding to form a metal wood head body, and a shaft tip portion 18 is attached to the shaft insertion portion 16 so as to be joined and integrated.

As disclosed in Japanese Utility Model Publication No. 61-33972 shown in FIG. 8, a face member 12, a sole member 14 and a crown member 15 are separately formed by press working, and these members are joined and assembled to be welded. A so-called three-piece type metal wood head 19 is known in which the shaft tip portion 18 is attached to the hosel portion 20 formed integrally by means of the above and joined and integrated.

In recent years, metal wood heads made of titanium alloy or aluminum alloy having a low specific gravity and a high strength have 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 the stainless metal wood head made by the conventional lost wax manufacturing method. Japanese Unexamined Patent Publication No.
No. 317467 or actual Kaihei 6-80455 shown in FIG.
The so-called two-piece type metal wood head as disclosed in Japanese Patent No. 312069 and methods for manufacturing these metal wood heads are known. These two-piece metal wood heads are characterized by a face portion 21 and an extension portion 22 extending from the face portion 21 to the rear of the metal wood head.
The face-side member 24 integrally formed with the hosel portion 23 and the back-side member 25 joined to the rear side of the face-side member 24 are joined to each other. It is formed by forming a plate-shaped member that is continuous with the extending portion 22 into a tubular shape and welding the abutting portions.

[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 molded by the lost wax manufacturing method to the metal wood head main body in which the crown portion and the hosel portion of the metal wood head are integrally molded, and joined to the metal wood head main body by welding. Since the integrated product is a cast product, segregation of molten metal components and pinholes and other defects during casting are likely to occur, and the crystallinity of the deposited metal material is large, and the metal wood head itself Since the mechanical strength is low, in order to improve the durability of the metal wood head, it is necessary to increase the thickness of the metal wood head outer shell itself that constitutes the metal wood head. Therefore, there is a drawback that the weight of the metal wood head increases, the volume ratio of the metal wood head decreases, and the sweet spot cannot be increased.

Therefore, in order to solve these problems,
So-called four-piece type metal wood heads as disclosed in Japanese Utility Model Publication No. 61-33970 shown in FIG. 7 are known. In these four-piece type metal wood heads, the respective members are formed by pressing. Since the molding is performed, the wall thickness of the outer shell itself forming the metal wood head can be reduced, which has an advantage that the volume ratio of the metal wood head can be increased.

On the other hand, however, since the hosel portion is integrally welded by welding the shaft insertion member to the three types of members, distortion is likely to occur in these weld portions, and in particular, the hosel portion is likely to be distorted. The metal wood head had a problem that the setting of important lie angle and loft angle was wrong. Further, there is a problem in that the welding portion becomes long as a whole, which requires time and effort in the manufacturing process, resulting in a high manufacturing cost. Furthermore, since it is necessary to preform three types of members and the shaft insertion member, the number of types of dies increases, and the die cost increases, which is also a factor of raising the manufacturing cost.

Therefore, as shown in FIG.
So-called three-piece type metal wood heads, such as those disclosed in No. 72, are known. However, in these three-piece type metal wood heads, each member is formed by press working, so that the metal wood head is configured. Since the thickness of the outer shell itself can be reduced, there is an advantage that the volume ratio of the metal wood head can be increased. However, on the other hand, there is a problem that the durability of the hit ball is reduced due to the decrease in the thickness of the outer shell itself that constitutes the metal wood head, particularly the decrease in the thickness of the face member and the crown member. It was

Further, since three kinds of members are welded to form a short hosel portion and the shaft tip portion is inserted and joined, the dimensional accuracy of the hole diameter of the shaft insertion hole opened in the hosel portion varies. However, when setting a lie angle, a face angle, and a loft angle, which are important in a metal wood head, it is difficult to join and fix the shaft to the tip end portion of the metal wood head, and there is a problem that an error occurs due to a clearance fit. In addition, since the welding points are concentrated on the hosel part, there is a risk that the physical properties of the hosel part will deteriorate due to heat history, and the welding of the hosel part takes time and effort in the manufacturing process, resulting in high manufacturing costs. It had the problem that it would be. Furthermore, since it is necessary to preform three types of members, the number of types of dies increases, and the die cost increases, which is also a factor of raising the manufacturing cost.

On the other hand, for the purpose of improving the hitting durability, a metal wood head disclosed in Japanese Patent Laid-Open No. 5-317467 shown in FIG. 9 and Japanese Utility Model Laid-Open No. 6-80455 shown in FIG. After roughly forming a metal plate having the shape of, a forging material having a face portion 21 and an extension portion 22 extending from the face portion 21 to the rear of the metal wood head is formed, and then the plate-shaped forging material is formed. A part of the material is formed into a tubular shape to form a hosel portion 23.
3 is integrally formed on the face side member 24, and a back side member 25 joined to the rear side of the face side member 24.
The metal wood head 26
Is formed.

However, since the hosel portion is formed by forming a part of the forged material into a plate shape and further bending it into a tubular shape to form a hosel portion, and by welding the hosel portion, the strength of the hosel portion is inevitable. Variation easily occurs, and the hardness difference between the welded part and the non-welded part of the hosel part is different,
While repeatedly hitting the ball, there was a possibility that the lie angle would change subtly at the low hardness part of the hosel part. In addition, in these conventional metal wood heads, since it is necessary to increase the volume ratio of the metal wood head, it is necessary to reduce the thickness of the outer shell of the metal wood head as a whole, which reduces the impact resistance. By repeatedly hitting the ball, unevenness is generated on the surface of the face portion, wear resistance is lowered, and further improvement has been demanded. Therefore, it has been desired to supply a metal wood head having good hitting durability and a larger volume ratio.

[0012]

DISCLOSURE OF THE INVENTION The present invention is a metal wood head invented to achieve the above object, wherein the metal wood head extends from the face portion and the upper portion of the face portion toward the rear of the metal wood head. A face crown member in which a hosel portion is integrally formed by forging on a protruding crown portion and a heel portion of the face portion, and a leading edge of the face portion from the heel portion at one end of the face portion formed by the face crown member. To the toe part, and to the toe part from the toe part to the back face part and to the lower end part of the hosel so as to match the shape of the peripheral edge part. Is erected, and the face part is opened and is integrally formed with the sole part by forging or pressing. The sole back face member joined integrally, a metal wood head configured by welding the bonding integral portion.

The face / crown member integrally formed by the forging process is made of a steel material, an aluminum alloy material, a titanium alloy material, or the like.
The sole / back face member is a metal wood head using a member integrally formed by forging or pressing an aluminum alloy material, a titanium alloy material, a pure titanium material, or the like.

In addition, the hosel portion is integrally formed with the face portion of the metal wood head, the crown portion extending from the upper portion of the face portion toward the rear of the metal wood head, and the heel portion of the face portion so that the hosel portion is integrally formed. A preface / crown member is integrally formed by forging a material having a plate shape, a rectangular shape, or the like, and further, from the heel portion at one end of the face portion formed by the preface / crown member to the leading edge of the face portion. To the toe part, and the peripheral part from the toe part to the lower end part of the hosel part through the back face part is trimmed to form a face / crown member, and further, the peripheral part shape of the face / crown member is formed. In order to match, the side wall part is erected from the toe part through the back face part to the heel part. Of the presole / back face member, which is integrally molded with the base part and has an open face part, is formed by forging or pressing a material having a shape such as a round bar, plate, or rectangle, and then trimmed to make the sole.・
After forming a back face member, joining it to the face / crown member, and welding the joining part to form a golf club metal wood head, the hosel part is processed so that the shaft can be attached to the metal wood metal wood. A metal wood head manufacturing method is characterized in that a head is formed.

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

As the metal wood head according to the present invention, a face formed integrally by forging.
The wall thickness of the crown member can be formed to be thicker than the wall thickness of the sole / back face member formed by the forging process or the press process, or can be the same.

In the forging process according to the present invention, a round rod-shaped material is hot forged, and in this case, the face / crown member can be formed by a semi-enclosed (flashing) forging method. In that case, the finishing die can be formed at a stretch, or can be formed by sequentially using a sawtooth die, a waste land die, and a finishing die. Further, when the sole / back face member is formed, a plate-shaped material can be hot forged or hot pressed, or cold forged or cold pressed. . However,
To prevent springback due to cold working,
It is desirable to use hot forging or hot pressing.

[0018]

In the present invention, the hosel portion is integrally formed by forging on the face portion of the metal wood head, the crown portion extending from the upper portion of the face portion toward the rear of the metal wood head, and the heel portion of the face portion. Since a face / crown member is used, the hosel part is separately molded like a conventionally known metal wood head and welded together with other members, or a plate-shaped member is formed into a tubular shape. There is no saying that it will be welded after it is processed into, and since the hosel part is formed integrally by forging, it is strong in strength, and the hosel part deforms even if it is repeatedly hit. Since there is no such thing, there is no fear that the lie angle, the face angle or the loft angle will be misaligned.

Further, a peripheral edge portion from the heel portion at one end of the face portion formed by the face / crown member to the toe portion through the leading edge portion of the face portion and from the toe portion to the lower end portion of the hosel portion through the back face portion. To match the shape, the side wall part is erected from the toe part through the back face part to the heel part,
In addition, a metal wood head is formed by integrally joining and integrating a sole / back face member formed by forging or pressing integrally with the sole with the face portion opened, and by welding the integrally joined portion. Therefore, unlike conventionally known metal wood heads, there are no welding points in the hosel portion, and there are two types of members that make up the metal wood head. Since it is a so-called two-piece system, dimensional accuracy is high, Since the number of molds is small, it is possible to suppress an increase in manufacturing cost.

Further, in the metal wood head of the present invention, the metal wood head is formed by adjusting the lie angle, face angle and loft angle of the metal wood head, and then performing processing so that the shaft can be attached to the hosel part. The metal wood head and the manufacturing method thereof are characterized in that the hosel portion can be processed so that the shaft can be mounted. For example, a shaft hole for inserting the shaft may be bored, or the shaft may be covered and mounted. It is also possible to form the over hosel to be formed by copying.
In this way, the hosel part is forged in a solid state at the same time, so it is possible to process the hosel part after adjusting the lie angle, face angle, and loft angle. In addition, since it is possible to adjust the lie angle, face angle and loft angle after processing the shaft attachment to the hosel part, various lie angles, face angles and loft angles can be handled. .

In the present invention, particularly when forming the face / crown member, a round bar-shaped material is hot forged and processed by using a semi-enclosed (flashing) forging method. Since the hosel part is integrally formed, not only does it have a forged structure, but a flow of metal fiber structure, that is, a grain flow line occurs, and the toughness against tensile stress in the direction of this line becomes high, and the high toughness Since a certain hosel part can be formed, the hitting durability is further improved.

Further, the metal wood head according to the present invention is characterized in that, for example, when the face / crown member and the sole / back face member are made of a titanium alloy or pure titanium material, as will be described later. In addition, by designing and combining the rigidity, elastic modulus, and wall thickness of each material, the mechanical impedance of the finished metal wood head is harmonized, the discomfort of the hitting sound is prevented, and the rebound characteristics can be improved. Becomes

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
As shown in FIG. 2, the hosel portion 5 is integrally forged with the face portion 2 of the metal wood head 1, the crown portion 3 extending from the face portion upper portion 2a toward the rear of the metal wood head, and the heel portion 4 of the face portion 2. The face / crown member 6 formed by processing, the heel portion 4 at one end of the face portion 2 formed by the face / crown member 6, the leading edge portion 2b of the face portion 2 to the toe portion 7, and the toe portion. Passing through the back face portion 8 from the toe portion 7 so as to match the shape of the peripheral portion toward the lower end portion 5a of the hosel portion through the back face portion 8 from the portion 7.
A side wall portion 9 is erected at a portion reaching the heel portion 4,
In addition, the sole back face member 11 formed by forging or pressing integrally with the sole portion 10 by opening a portion corresponding to the face portion 2 is joined and integrated, and the joined and integrated portion is welded. It is a metal wood head 1.

The face / crown member 6 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 sole / back face member 11 is a steel material. Material,
The metal wood head 1 uses a member integrally formed by forging or pressing an aluminum alloy material, a titanium alloy material, a pure titanium material, or the like.

As shown in FIGS. 5 to 6, the face portion 2 of the metal wood head 1 and the upper portion 2a of the face portion 2a.
From the crown portion 3 extending from the rear of the metal wood head to the heel portion 4 of the face portion 2 and the hosel portion 5
So as to be integrally formed, the preface / crown member 6a is integrally formed by forging a material 6b having a round bar shape, a plate shape, a rectangular shape, or the like. Formed on the peripheral portion from the heel portion 4 at one end of the face portion 2 to the toe portion 7 through the leading edge portion 2b of the face portion 2 and the toe portion 7 through the back face portion 8 to the lower end portion 5a of the hosel portion. The burrs 6c are trimmed to form the face / crown member 6, and the toe portion 7 passes through the back face portion 8 to reach the heel portion 4 so as to match the peripheral edge shape of the face / crown member 6. In the portion, the side wall portion 9 is erected and formed integrally with the sole portion 10,
Further, the presole / back face member 11a having an opening corresponding to the face portion 2 is formed by forging or pressing a material 11b having a shape such as a round bar shape, a plate shape, or a rectangular shape, and then trimmed to trim the sole / back face member. 11 is formed, is joined to the face / crown member 6, and the joined portion is welded to form the metal wood head 1. Then, the hosel portion 5 is processed so that the shaft can be mounted. It is a method of manufacturing the metal wood head 1. As a method of trimming, a method such as copying cutting, a method of punching and cutting using a punching die, a method of polishing and trimming, a method of laser cutting and the like are also possible.

The face / crown member 6 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 sole The back face member 11 is a method for manufacturing the metal wood head 1 characterized by integrally forming a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material, etc. by forging or pressing.

As the material used for the face / crown member 6 and the sole / back face member 11 of the present invention, the following metal materials can be used. That is, of the iron and steel materials, carbon steel for machine structural use (S25
C, S35C, S45C, etc), chrome molybdenum steel (SCM440, etc), chrome steel (SC
r440, etc), for manganese steel (SMn443,
etc), for stainless steel (SUS304, SUS4)
Materials such as 20J2, SUS630, etc) can be used. For aluminum alloy materials (A2014, A20
17, A2024, 5000-6000 range or A
7N01, A7075, etc.) can be used. For pure titanium materials and titanium alloy materials, (Ti-
6Al-4V, Ti-4Al-22V, Ti-15V-
3Cr-3Al-3Sn, Ti-4.5Al-3V-2
Fe-2Mo, Ti-10V-2Fe-3Al, et
Materials such as c) can be appropriately selected and used.

(Embodiment 1) As an embodiment of the metal wood head 1 of the present invention, as shown in FIG. 5 (a), the face / crown member 6 is made of titanium alloy Ti-4Al-. 22V and Ti-4.5Al-3V-
By using a round bar-shaped material such as 2Fe-2Mo and using semi-closed type (flashing) forging by hot forging, as shown in FIG. 5 (b), ductility is good and high strength with high toughness is obtained. Various members can be formed by forging. In that case, face
The wall thickness of the crown member 6 is about 2.5 mm to about 3.5.
It is desirable to set it to about mm. Further, trimming is performed to form the face / crown member 6 shown in FIG. 5 (c). The thickness of the face portion 2 is preferably about 3.0 mm from the viewpoint of weight distribution, hitting ball durability and strength. It is also possible to form stiffeners 2c of protruding ridges that are vertically raised in the face portion 2 to reinforce the strength, and if the thickness of the face portion is set to be thick, the stiffeners 2c of these ridges can be increased. It may not be formed.

Further, as shown in FIGS. 6 (a) and 6 (b), the sole / back face member 11 is made of titanium alloy material such as Ti-4Al-22V or Ti.
If a plate-shaped material such as -4.5Al-3V-2Fe-2Mo is used, since the ductility is relatively good, the shape required for the presole / backface member 10a is pressed (of course, forging is also used. 6), and then trimming as shown in FIG. 6C to form the sole / backface member 10. The thickness at that time is as follows.
It 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, durability can be maintained as a metal head, so the head volume To increase the ratio, a thin wall thickness can be selected.

Since the sole / back face member 11 is not required to have the same strength as the face / crown member 6 described above, for example, a pure titanium material is used for forging or a plate-like member. It is possible to form a pure titanium material into a required shape by pressing.
In that case, the thickness of the sole / back face member 11 may be about 1.5 mm to 2.5 mm, and about 2.5 mm from the viewpoint of durability and weight distribution, a satisfactory metal. The head can be supplied. Furthermore,
Compared with the above-mentioned titanium alloy material, the pure titanium material is more economical in raw material cost. It is of course possible to use a pure titanium material as the material of the face / crown member 6, and it is of course possible to combine the sole / back face member 11 with a pure titanium material.

(Embodiment 2) As another embodiment of the metal wood head 1 of the present invention, a face / crown member 6 is used.
The material of the aluminum alloy material is (A20
14, A2017, A2024, 5000-6000 series, A7N01, A7075, etc) and the like have good ductility and strength, so that the required shape can be formed by forging. In that case, the wall thickness of the face / crown member 6 can be set to about 4.0 mm to about 6 mm. Particularly, the thickness of the face portion is preferably about 5.0 mm. Further, as the material of the sole / back face member 11,
As an aluminum alloy material (A2014, A2017,
A2024, 5000-6000 series or A7N0
1, A7075, etc) and the like have relatively good ductility, so the required shape is formed by forging, and in that case, the thickness of the sole / back face member 10 is about 2.0 mm. It can be set to about 4.0 mm.

Since the sole / back face member 11 is not required to have the same strength as the face / crown member 6, the material such as aluminum alloy material (A2014, A2017, etc) is used. It can be forged or pressed into a required shape. In this case, the thickness of the sole / back face member 11 is about 3.0.
If it is about mm, it is possible to supply a satisfactory metal head in terms of durability and weight distribution, and the above-mentioned (5000 to 6000 series or A7N01, A70
75, etc) and the like (A2014, A201
7, etc) is more economical in terms of raw material cost.

(Embodiment 3) As an embodiment of the metal wood head 1 of the present invention, as the material of the face / crown member 6, carbon steel for machine structure (S25C,
S35C, S45C, etc), chrome molybdenum steel (SCM440, etc), chrome steel (SCr440,
etc), for manganese steel (SMn443, etc),
Stainless steel (SUS304, SUS420J2, SU
S630, etc) or the like can be used. Further, in that case, as the thickness of the face / crown member 6,
It can be set to about 2.0 mm to about 3.0 mm.

Particularly, the thickness of the face portion is preferably about 2.5 mm. Further, as the material of the sole / back face member 11, carbon steel for machine structure (S25C, S35C, S45C, etc) as iron steel material,
For chrome molybdenum steel (SCM440, etc), chrome steel (SCr440, etc), and manganese steel (SMn
443, etc), stainless steel (SUS304, SU
S420J2, SUS630, etc) or the like can be used. In this case, the thickness of the sole / back face member 11 can be set to about 0.5 mm to about 2.0 mm, but if there is a thickness of about 1.0 mm, it can be used as a metal head. It can maintain durability. When stainless steel SUS630 is used as the face / crown member 6 and stainless steel SUS630 is used as the sole / back face member 11, the thickness of the face / crown member 6 is about 1.5 mm. The thickness of the sole / back face member 11 is about 1.2 mm, and the durability can be sufficiently maintained at about 1.2 mm.

[0035]

As described above, in the metal wood head of the present invention, the face part of the metal wood head, the crown part extending from the upper part of the face part toward the rear of the metal wood head, and the heel part of the face part. In order to use a face / crown member formed by integrally forging the hosel part, the hosel part is separately molded like a conventionally known metal wood head,
We have never said that it is welded so as to be integrated with other members, or that what is molded into a plate is processed into a tubular shape and then welded, and the hosel part is formed by forging at the same time. Since the strength is strong, the hosel part does not deform even if the ball is repeatedly hit, so there is no risk of deviation in the lie angle, face angle or loft angle, and the hitting durability is significantly improved. Is.

Further, a peripheral edge portion from the heel portion at one end of the face portion formed by the face / crown member to the toe portion through the leading edge portion of the face portion and from the toe portion to the lower end portion of the hosel portion through the back face portion. To match the shape, the side wall part is erected from the toe part through the back face part to the heel part,
In addition, a metal wood head is formed by integrally joining and integrating a sole / back face member formed by forging or pressing integrally with the sole with the face portion opened, and by welding the integrally joined portion. Therefore, unlike a conventionally known metal wood head, a hosel portion does not have a welded portion, and only two types of members constituting the metal wood head are required, which is a so-called two-piece system, and therefore has high dimensional accuracy. It can be supplied with a metal wood head.

Further, in the manufacturing method of the present invention, since it is a two-piece method as described above, the number of molds is small and the manufacturing cost can be reduced. And, unlike the conventional method for manufacturing a metal wood head, unlike the manufacturing method in which the parts forming the metal wood head body and the hosel parts forming the hosel part are joined and integrated by welding, the metal wood head of the present invention is In the manufacturing method, since the face / crown member integrally formed with the hosel portion is formed by forging, the manufacturing process can be simplified.

Further, in the metal wood head of the present invention, since the hosel portion is drilled after adjusting the loft angle and the lie angle of the metal wood head, various loft angles and lie angles can be dealt with. The effect is that we can supply metal wood heads that meet user needs.

In the present invention, particularly when forming the face / crown member, a round rod-shaped material is hot forged and processed by using a semi-enclosed (flashing) forging method. Since the hosel part is formed integrally, not only has the forged structure in the hosel part, but also the flow of the fiber structure, that is, the grain flow line occurs, and the toughness against tensile stress in the direction of this line becomes high, Since the hosel portion having high toughness can be formed, it has the effect of further improving the hitting durability. Also, when forming the face / crown member and the sole / back face member using titanium alloy or pure titanium materials, the rigidity, elastic modulus and wall thickness of each material were designed and combined to create the product. The mechanical impedance of the metal wood head is harmonized, the discomfort of the hitting sound is prevented, and the resilience characteristics are improved.

[Brief description of 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 / crown member and a sole / back face member according to the present invention.

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

FIG. 4 is an explanatory view showing an inner surface side of a face crown member according to the present invention.

FIG. 5 is an explanatory view showing the steps of the face / crown member of the method for manufacturing a metal wood head according to the present invention.

FIG. 6 is an explanatory view showing the steps of the sole / back face member of the method for manufacturing a metal wood head according to the present invention.

FIG. 7 is a perspective view showing a combination of constituent members of a conventionally known metal wood head.

FIG. 8 is a perspective view showing a combination of constituent members of a conventionally known metal wood head.

FIG. 9 is a perspective view showing a combination of constituent members of a conventionally known metal wood head.

FIG. 10 is a perspective view showing a combination of constituent members of a conventionally known metal wood head.

[Explanation of symbols]

 1 metal wood head 2 face part 2a face part upper part 2b leading edge part 2c stiffener 3 crown part 4 heel part 5 hosel part 5a hosel part lower end part 6 face crown member 6a preface crown member 6b material 6c barb 7 toe part 8 Back face part 9 Side wall part 10 Sole part 11 Sole / back face member 11a Presole / back face member 11b Material 12 Face member 13 Divided hosel part 14 Sole member 15 Crown member 16 Shaft insertion part 17 Reinforcing rib 18 Shaft tip part 19 Metal wood Head 20 Hosel part 21 Face part 22 Extension part 23 Hosel part 24 Face side member 25 Back side member 26 Metal wood head

Claims (4)

[Claims] 1. A face crown formed by integrally forging a face portion of a metal wood head, a crown portion extending from the upper portion of the face portion toward the rear of the head, and a heel portion of the face portion with a hosel portion. Member and the face / crown member to form a peripheral edge shape from the heel portion at one end of the face portion to the toe portion through the leading edge portion of the face portion, to the toe portion through the toe portion, the back face portion, and the lower end portion of the hosel portion. To match, a side wall is erected from the toe part to the back face part to the heel part, and the face part is opened and is integrally formed with the sole part by forging or pressing. It is characterized in that the formed sole / back face member is joined and integrated, and the joined and integrated portion is welded. Metal wood head. 2. A face / crown member integrally formed by the forging process is made of a steel material, an aluminum alloy material, a titanium alloy material, or the like, while the sole / back face member is made of a steel material, The metal wood head according to claim 1, wherein an aluminum alloy material, a titanium alloy material, a pure titanium material and the like are integrally formed by forging or pressing. 3. A shape of a round bar or the like so that the hosel portion is integrally formed with the face portion of the metal wood head, the crown portion extending from the upper portion of the face portion toward the rear of the head, and the heel portion of the face portion. By forging a material having a preface / crown member integrally, and further from the heel portion at one end of the face portion formed by the preface / crown member to the toe portion through the leading edge portion of the face portion, A peripheral edge portion from the toe portion through the back face portion to the lower end portion of the hosel portion is trimmed to form a face / crown member, and further, from the toe portion so as to match the peripheral edge shape of the face / crown member. The side wall portion is erected at a portion passing through the back face portion and reaching the heel portion and is integrally formed with the sole portion, and Pressor with open face
The back face member is formed by forging or pressing a material having a shape such as a round bar, and then trimmed to form a sole / back face member.
A method for manufacturing a metal wood head, which is formed by joining a crown member and welding the joined portion to form a golf club head, and then subjecting the hosel portion to processing for mounting a shaft. 4. A face / crown member integrally formed by forging according to the method for manufacturing a metal wood head is made of a steel material, an aluminum alloy material, a titanium alloy material, or the like, while the sole The method of manufacturing a metal wood head, wherein the back face member is integrally formed by forging or pressing a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material, or the like.