JPH1147319A - Metallic wood club head and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the durability of a metal wood head and the productivity thereof. SOLUTION: A face hosel member consists of a face part, an extension part which extends backward from the upper part of this face part, a hosel part 3 which extends upward on the heel side 4d of the face part and a hosel extension part 3b which is so extended as to arrive at a sole part 6 and is formed to project backward of the face by overlaying on the rear side of the face part. This extension part has the width exceeding a hosel part base part 3a and the hosel extension part 3b in a range from the hosel part base part 3a mounted with the hosel part 3 past the heel side 4d to a hosel bottom end 3c existing at the sole part 6. This width is so determined as to be gradually smaller toward the sole part 6 from the hosel part base part 3a through a crown part 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[0002]

2. Description of the Related Art As a metal wood head formed by pressing or forging, a shell member obtained by dividing a head shell into two or three parts is formed in advance by pressing or forging, and these members are welded or the like. They are joined to form a head body. The outer shell member of the head is divided, for example, as shown in FIG. 5 and described in Japanese Utility Model Publication No. 61-33971, the front portion 10 including the half of the face portion and the neck portion, the back surface and the neck portion. And a shaft connecting pipe 13 for connecting a shaft separately from the outer shell member, which is formed separately from the outer shell member. It is publicly known that the member is joined and integrated with the shaft connecting pipe 13 by welding. At the time of this fixing, the lower end of the shaft connection pipe 13 abuts on the sole portion 12 of the outer shell member and is fixed by welding or the like.

[0003] FIG.
As described in Japanese Patent Laid-Open No. 6-206, a head body 14 and a crown member 15 formed in a container shape having an open top surface are used.
Forming two outer shell members and a neck member 16 that penetrates a notch 15a formed at an end of the crown member, one end of which is located in the head body and has a flange 16a at an intermediate portion; It is known that each member is joined and integrated by welding.

The so-called through-bore type head has a structure in which the neck portion is extended to the sole portion 14a inside the hollow head, and the extended portion 16b is fixed to the sole portion 14a. Because of the structure in which the extension 16b of the neck is extended inside the hollow head, the neck-extension is formed as a member formed separately from an outer shell member for constituting the head. Each member is joined and integrated by welding or the like.

[0005]

The above-mentioned conventionally known metal wood heads have the following problems. That is, the former is divided into two outer shell members of a front portion 10 including a face portion and a half hosel portion, and a rear portion 11 including a back surface.
Also, a shaft connecting pipe 13 for connecting a shaft separately from the outer shell member is formed, and these outer shell members are joined and integrated together with the shaft connecting pipe 13 by welding. Since the members are formed, the thickness of the outer shell constituting the metal wood head can be reduced, and the volume ratio of the metal wood head can be increased.

However, since the shaft mounting pipe 13 is welded to the two kinds of outer shell members and the entire head is integrally welded from the hosel portion, the weld portion of the hosel portion is likely to be distorted. In the metal wood head, there is a problem that the setting of the important lie angle and loft angle is deviated. Further, the welded portions are concentrated on the hosel portion, and there is a possibility that the physical properties may be reduced in the hosel portion due to heat history.

Further, the latter, two outer shell members of a head body 14 and a crown member 15 formed in a container shape with an open upper surface, and a notch 15a formed at an end of the crown member 15 penetrates. Then, a neck member 16 having one end positioned in the head body and having a flange portion 16a at an intermediate portion is formed, and the above members are joined and integrated by welding to constitute the head body. Since the outer shell member is formed separately from the outer shell member and the outer shell member is welded at the skirt portion of the flange 16a of the neck member 16, the welding work is performed in comparison with a member directly welded to the neck member 16. However, since the welding is performed over the entire circumference of the flange portion 16a, the welded portion is also concentrated on the neck portion, and there is a possibility that the physical properties of the neck portion may be reduced due to heat history.

Further, the neck member is an independent member, and the lie angle, face angle, loft angle, and the like are set when the outer shell member and the neck member are integrated by welding. In addition to the labor involved in the process, the manufacturing cost is increased, and the neck member is separate from the outer shell member for forming the head, so that there is a problem in that there is also a problem in the strength of the connection of the shaft. Was.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, an object of the present invention is to provide a hollow metal wood club head which extends from a face portion and an edge of the face portion to the rear of the head. A face hosel formed by forging a hosel portion extending upward at a heel side upper portion of the face portion and a hosel extension portion extending from the hosel base portion into the head hollow portion and reaching the sole portion. A member and a back member formed on the rear side of the face hosel member so as to conform to the shape of the rear peripheral portion of the face hosel member. In a range extending from the base to the sole through the heel side, the hosel extends beyond the hosel base and the hosel extension, and the face extends. On the back side, a hosel extension is formed projecting rearward, and the back member has a structure in which a cutout portion is formed on the heel side of the sole portion, in which a lower end of the hosel extension is fitted. did.

According to a second aspect of the present invention, in the metal wood head according to the first aspect of the present invention, the width of the extending portion of the face hosel member gradually decreases from the hosel base to the sole through the crown. This is a metal wood club head having a configuration.

According to a third aspect of the present invention, in the metal wood head according to the first or second aspect of the present invention, a concave / convex portion for positioning is formed on a joining peripheral portion of a crown portion of the face hosel member and the back member. It is a metal hollow wood club head having the configuration described above.

[0012] The invention of claim 4 is the invention of claim 1, 2, or 3.
In the metal wood head of the invention, a hole is formed in the wall surface of the back member to connect the hollow inside and the outside of the metal wood head. In the head according to the present invention, since the face-hosel member and the back member are divided and joined by a single welding operation, the hole is formed in advance on the wall surface of the back member, and the head is hollowed by heat during welding. Reduce the rise in internal air pressure to prevent poor welding.

According to a fifth aspect of the present invention, in the metal wood head according to the first, second, third or fourth aspect, the length of the hosel portion of the face hosel member is smaller than the length of the hosel extension portion. did.

According to a sixth aspect of the present invention, there is provided a hollow metal wood club head having a face portion, an extending portion extending rearward from the edge of the face portion, a hosel portion extending upward at a heel side upper portion of the face portion, and The pre-face hosel member is integrally formed by forging a material having a round bar shape so that the hosel extension extending from the base of the hosel part into the head hollow part and reaching the sole part is integrally formed Then, the rear peripheral portion of the face hosel member is trimmed to form a face hosel member, and the back member having an opening conforming to the rear peripheral shape of the face hosel member is round bar-shaped or the like. After forming a pre-back member by forging or pressing a material having the shape shown in FIG. A material is formed, or a back member is formed by casting, the face hosel member and the back member are joined, and the joint is welded to form a golf club head. A method for manufacturing a metal wood club head, comprising forming a hole.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings shown in FIGS. As shown in FIGS. 1 and 2, reference numeral 1 denotes a metal wood head according to the present invention. The metal wood head 1 has a hollow shell structure made of metal, and includes a face portion 4, a crown portion 7, a sole portion 6, And it has the form which consists of the hosel part 3 formed in the upper part of the heel side 4d of the face part 4 and projecting upward. The metal wood head 1 is shown in FIGS.
As shown in FIG. 3, the face portion 4 and an extension portion 4a extending rearward from an upper portion of the face portion 4;
The hosel portion 3 extending upward on the heel side 4d and the hosel extension portion 3b extending to the sole portion 6 are filled in the head hollow portion of the hosel portion 3 on the back side of the face portion 4. Thus, the face hosel member 2 formed so as to project rearward of the face, and the face hosel member 2
The hosel member 2 is divided into a back member 5 and a split member joined to the rear peripheral portion 2a of the hosel member 2.

The face hosel member 2 is formed with an extension 4a extending rearward from the peripheral edge of the face 4, and the hosel 3 is attached to the extension 4a. The hosel base 3a and the hosel extension 3 extend from the hosel base 3a to the hosel lower end 3c of the sole 6 through the heel side 4d.
b, and the width gradually decreases from the hosel base 3a to the sole 6 through the crown 7. With such a structure, it is possible to minimize the influence of welding heat on the hosel portion 3 and the hosel extension portion 3b at the time of welding and joining with the back member 5. If the width of the extension 4a is too large, it becomes difficult to form the extension 4a, and it is also difficult to accurately form the thickness and the angle. Also,
A recess 2b is formed in the crown 7 of the extension 4a.

The back member 5 has an opening peripheral portion 5c corresponding to the rear peripheral portion 2a of the face hosel member 2.
A convex portion 5a is formed at a position corresponding to the concave portion 2b of the face / back member 2,
The joining position of the two members on the crown side is determined. And,
A hosel lower end 3c of a hosel extension 3b projecting rearward from the face hosel member 2 is provided on an opening peripheral portion 5c of the heel side 4d of the sole portion 6 of the back member 5.
A notch 5b is formed to fit the two members, and determines the joining position of the two members on the sole side. The length of the hosel part 3 is
It is formed smaller than the length of the hosel extension 3b so that the center of gravity does not rise. Further, a hole 5e having a diameter of about 8 mm is provided in the side wall 5d of the back member 5 so that the air pressure between the inside and the outside of the head is kept constant. It prevents bubbles from being generated in the part.

In order to manufacture the metal wood head 1 having the above configuration, as shown in FIGS.
And an extending portion 4a extending rearward from the edge of the face portion 4 to the head, a hosel portion 3 extending upward above the heel side 4d of the face portion 4, and a hosel base portion 3a of the hosel portion 3 extending into the head hollow portion. A pre-face hosel member (not shown) is integrally formed by forging from a material having a round bar shape or the like so that the hosel extension 3b reaching the sole portion 6 is integrally formed. A face hosel member 2 is formed by trimming the rear peripheral portion of the pre-face hosel member. Next, a pre-back member is formed by forging, pressing or casting a back member 5 having an opening corresponding to the shape of the rear peripheral portion of the face hosel member 2 with a material having a round bar shape or the like. I do. Thereafter, the periphery of the opening is trimmed to form the back member 5. Then, the face hosel member 2 and the back member 5 are joined,
After welding the joint to form a golf club head,
A hole 3d for mounting a shaft was formed in the hosel portion 3 to obtain a metal wood head.

In the present invention, the material of the face hosel member is Ti-4Al- in a titanium alloy.
According to the hot forging method using a round bar material such as 22V or Ti-4.5Al-3V-2Fe-2Mo, a high-strength member having good ductility and high toughness can be formed. Also,
In that case, it is desirable to set the thickness to about 2.5 mm to about 3.5 mm.

As the material of the back member, Ti-4Al-22V or Ti-4.5Al-
It is formed by press working using a plate-shaped material such as 3V-2Fe-2Mo. In that case, the thickness is about 0.8mm
It can be set to about 2.0 mm.

In addition, as the material of the face hosel member, a steel material, an aluminum alloy material or the like can be used in addition to the above. The steel material is S2
Carbon steel for machine structure such as 5C and S35C, chromium molybdenum steel, chromium steel, manganese steel, and stainless steel can be used. In that case, the thickness is set to about 2.0 mm to about 3.0 mm. A2014, A2017, A20
24, 5000-6000 series or A7N01, A
7075 or the like can be used. In this case, the thickness can be set to about 4.0 mm to about 6.0 mm.

The material of the back member does not need to be as strong as the face hosel member. For example, a pure titanium material, an aluminum alloy, a steel material or the like can be used. When a pure titanium material is used, its thickness may be about 1.0 mm to about 2.5 mm.
As the steel material, carbon steel for machine structure such as S25C and S35C, chromium molybdenum steel, chromium steel, manganese steel, and stainless steel can be used. In this case, the wall thickness is about 0.5 mm to about 2. It can be set to about 0 mm. As aluminum alloys, A2014, A2
017 or the like can be used, and the thickness thereof can be set to about 2.0 mm to about 4.0 mm.

The face hosel member is preferably formed by forging according to the required characteristics, but the back member is formed by forging or pressing similarly to the face hosel member, or by casting. It may be molded.

[0024]

The present invention is embodied in the form described above and has the following effects. That is, the hosel portion and the hosel extension portion are integrally formed by forging on the heel side of the face portion and the extension portion extending toward the head rear from the upper portion of the face portion and the face portion of the metal wood head, Since the extension portion is formed to have a width including the hosel base portion and the hosel extension portion, a hosel portion or a hosel portion and a hosel extension portion are separately formed like a conventionally known metal wood head. However, it is possible to simplify the process without joining and integrating with other members by welding, and since the hosel part and hosel extension part are simultaneously integrated with the face part by forging, it is strong. The hosel part is not deformed even if it is repeatedly hit, and there is no possibility that the lie angle, face angle or loft angle will be out of order. , In which hitting durability is significantly improved.

Further, in welding the back member and the face hosel member, the hosel portion and the hosel extension portion are formed with an extension portion extending rearward from the face portion. Since the peripheral edge and the peripheral edge of the opening of the back member are welded, no welded portion is formed on the hosel portion and the hosel extension portion. The drop can be prevented.

According to the manufacturing method of the present invention, as described above, since it is composed of the face hosel member and the back member, the number of molds can be reduced, and the manufacturing cost can be reduced. The face hosel member is formed by processing a round bar-shaped material by hot forging, and a face portion, a face extension portion, a hosel portion, and a hosel extension portion are integrally formed. Flow, that is, a torsion line is generated in a series, the toughness against the tensile stress in the direction of this line is increased, and a high toughness face hosel portion can be formed, so that the hit ball durability is further improved This has the effect. Furthermore, if the back member is formed by casting, the processing steps can be simplified, and the manufacturing cost can be reduced.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an embodiment of a metal wood head according to the present invention.

FIG. 2 is an explanatory diagram of the embodiment of the metal wood head according to the present invention as viewed from the bottom.

FIG. 3 is an exploded perspective view of the embodiment of the metal wood head according to the present invention.

FIG. 4 is a perspective view of a face hosel member of the embodiment of the metal wood head according to the present invention.

FIG. 5 is an exploded perspective view of a conventionally known metal wood head.

FIG. 6 is an exploded perspective view of a conventionally known metal wood head.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 metal wood head 2 face hosel member 2a rear peripheral edge 2b recess 3 hosel portion 3a hosel base 3b hosel extension 3c hosel lower end 3d hole 4 face 4a extension 4d heel side 5 back member 5a protrusion 5b notch 5c Opening edge 5d Side wall 5e Hole 6 Sole part 7 Crown 10 Front side part 11 Rear side part 12 Sole part 13 Shaft connection pipe 14 Head body 14a Sole part 15 Crown member 15a Cutout part 16 Neck member 16a Flange part 16b Extension Department

Claims (6)

[Claims] 1. A hollow metal wood club head, comprising: a face portion, an extending portion extending rearward from the edge of the face portion, a hosel portion extending upward at an upper portion of a heel side of the face portion, and a hosel portion extending from the hosel portion. A face hosel member integrally formed by forging with a hosel extension extending from the base into the head hollow portion and reaching the sole portion, and a rear edge of the face hosel member on the rear side of the face hosel member A back member formed to conform to the shape of the part,
The hosel member extends beyond the hosel base and the hosel extension in a range where the extension extends from the base of the hosel to the sole through the heel side, and on the back side of the face. The hosel extension is formed to protrude rearward, and the back member has a cutout portion on the heel side of the sole portion, into which the lower end of the hosel extension is fitted. Metal wood club head. 2. The metal wood club head according to claim 1, wherein the width of the extending portion of the face hosel member gradually decreases from the hosel base to the sole through the crown. 3. The metal wood according to claim 1, wherein a concave / convex portion for positioning is formed at a joint peripheral portion of a crown portion of the face hosel member and the back member. Club head. 4. The metal wood club head according to claim 1, wherein a hole is formed in a wall surface of the back member to connect the inside of the head hollow to the outside. 5. The metal wood club head according to claim 1, wherein the length of the hosel portion of the face hosel member is smaller than the length of the hosel extension. 6. A face portion of a hollow metal wood club head, an extension portion extending rearward from the edge of the face portion, a hosel portion extending upward at a heel side upper portion of the face portion, and a base portion of the hosel portion. After forming the pre-face hosel member integrally by forging a material having a shape such as a round bar, so that the hosel extension extending from the head to the sole and extending to the sole is integrally formed, Trim the rear edge of the face hosel member to form a face hosel member,
After forming a pre-back member by forging or pressing a material having a shape such as a round bar, a back member having an opening corresponding to the rear peripheral shape of the face hosel member, trimming the peripheral edge of the opening. After molding the back member, or molding the back member by casting, joining the face hosel member and the back member, welding the joint to form a golf club head, and then forming the shaft in the hosel portion A method for manufacturing a metal wood club head, comprising forming a mounting hole.