JP2001095954A - Golf club head and method for manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head made of a metal, wherein the location of the center of gravity for the head can be made higher, the manufacture is easy, and the strength is high, and also provide a method of manufacturing the same. SOLUTION: This golf club head has a face surface member 10, and a head main body hollow section 12, which is located behind the face surface member 10 and is hollow, and on which a face surface attaching section 14 is opened. A shaft-attaching pipe 24 is welded to the head main body hollow section 12, and the face surface member 10 is welded to the face surface attaching section 14. Then, a pipe-holding recess 34 is provided at the welded location of the shaft-attaching pipe 24 on the head main body hollow section 12, and the head main body hollow section 12 is formed of a titanium alloy. Then, the golf club head is formed in a manner to have an approx. equal thickness at respective sections.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal wood golf club head having a metal shell and a method of manufacturing the same.

[0002]

2. Description of the Related Art As disclosed in Japanese Utility Model Publication No. 61-33970 and Japanese Utility Model Publication No. 61-33973, a conventional so-called metal wood is formed by adding a plurality of metal shell pieces integrally to a golf club head body. The face member of the plate was welded. Further, as disclosed in JP-A-5-137818 and JP-A-6-142236, the body side of the golf club head is integrally formed by plastic working or the like, and a metal plate material is formed in the front opening. Are also proposed.

[0003]

In the case of the above prior art, when a shaft mounting pipe for mounting a shaft of a golf club is mounted on the head body, the mounting angle determines a loft angle and a lie angle. , Special jigs were needed to ensure accuracy. Moreover,
Since there is no part in the head body that stably holds the shaft mounting pipe, even a slight displacement of the head body appears as a deviation of the shaft mounting angle, and the welding work of this shaft mounting pipe is extremely troublesome and accurate. It was difficult to give a great angle.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and a metal golf club head having a high strength can be mounted with high accuracy, is easy to manufacture, and has high strength. It is intended to provide a manufacturing method.

[0005]

SUMMARY OF THE INVENTION The present invention has a face member and a hollow head body located behind the face member and having a hollow face surface mounting portion.
A golf club head in which a shaft mounting pipe is welded to the hollow portion of the head body and a face member is welded to the face surface mounting portion, and the shaft mounting pipe is welded to the shaft mounting pipe at a welding position. A pipe holding recess for setting the mounting angle between the head main body hollow portion and the shaft mounting pipe is provided, and in a state where the shaft mounting pipe is in contact with the pipe holding recess, the shaft mounting pipe is It is a golf club head in which an attachment angle is set. Further, the face member and the hollow portion of the head main body are a golf club head formed of various β-type titanium alloys and thinner than the face member and having substantially equal thicknesses.

[0006] The pipe holding recess is formed in a substantially semi-cylindrical shape so as to make surface contact with the shaft mounting pipe.
The side surface of the shaft mounting pipe and both side edges of the pipe holding recess are welded. A golf club head having a thin portion formed on the back surface of the face member at a certain area from the center of the face surface and thinner than the peripheral portion thereof. The thin portion is formed in a concave lens shape so as to be continuously thin from the peripheral portion to the center portion. A plurality of shallow grooves are formed in parallel on the front and back surfaces of the face member.

Further, the present invention has a face member and a hollow head body which is located behind the face member and has a hollow face-face mounting portion which is open. A method of manufacturing a golf club head comprising welding a pipe and welding a face member to the face surface mounting portion, wherein the head main body hollow portion is formed by plastic working or casting. At the welding position of the pipe, a pipe holding recess is formed, which is in contact with the shaft mounting pipe and sets a mounting angle between the head main body hollow portion and the shaft mounting pipe,
Thereafter, the method is a method for manufacturing a golf club head in which the shaft mounting pipe is brought into contact with the pipe holding recess and welded. The hollow portion of the head main body is formed by press molding such as cold or hot forging, and forms the pipe holding concave portion during the press molding.

In the golf club head according to the present invention, when the shaft mounting pipe is joined to the hollow body of the head body, the pipe holding recess is brought into contact with the shaft mounting recess so that the relative position between the hollow body of the head body and the shaft mounting pipe is reduced. The head body hollow portion and the shaft mounting pipe are accurately positioned so that the mounting angle between the golf club head and the shaft is formed stably and accurately because the two are welded in a state where the target positional relationship is set. It is.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 5 show a golf club head according to a first embodiment of the present invention. The golf club head according to this embodiment includes a face member 10 for hitting a ball and a hollow head body hollow portion 12. . The face surface member 10 has a plurality of shallow grooves 10a formed on the front surface and the back surface thereof to enhance the strength. The face surface member 10 is integrally welded along the face surface mounting portion 14 of the head main body hollow portion 12. A weight 16 for adjusting the center of gravity is provided at a predetermined position in the hollow portion 12 of the head body.
Has been fixed.

The hollow portion 12 of the head body includes an upper surface portion 20 having a substantially flat plate shape, and a side peripheral bottom surface portion 22 integrally formed with a sole portion and a side peripheral portion.
Are welded together at their peripheral edges to form a welded portion 30. A shaft mounting pipe 24 is integrally welded to the head main body hollow portion 12. As shown in the figure, the shaft mounting pipe 24 has its lower end 24a welded to the inner surface of the sole portion of the side peripheral bottom surface portion 22 to form a welded portion 30. The upper portion 24b of the shaft mounting pipe 24 also A welded portion 30 is formed by welding the upper surface portion 20 and the side peripheral bottom surface portion 22 to the shaft mounting position. The shaft mounting pipe 24 is formed by hollowing out a titanium rod, and the lower end 24a is formed solid.
The middle part is formed in a pipe shape. Then, the shaft 26 is fitted into and adhered to the shaft mounting pipe 24 to form a golf club.

[0011] The shaft mounting pipe 2 of the side peripheral bottom portion 22
4 is a welding portion 2 of the shaft mounting pipe 24.
A semi-cylindrical pipe holding recess 34 of a size to which 4c fits
Are integrally formed. The pipe holding recess 34 has a diameter substantially equal to the diameter of the welding portion 24c of the shaft mounting pipe 24, and is formed in a groove shape having a length substantially equal to the height of the side surface.

Here, since the face member 10 is a portion that hits a ball and requires high strength, it is made of various types of β-type titanium, which is a titanium alloy, from 2.5 mm to 3.5 mm.
mm, and the head body hollow portion 12 is made of various β-type titanium alloys having a thickness of about 1.2 mm in order to reduce the weight of the head body and position the center of gravity upward. Has formed. Shaft mounting pipe 14
Are also formed of a β-type titanium alloy. As the β-type titanium alloy, Ti-22V-4Al alloy is preferable, and further, Ti-13V-11C
r-3Al alloy, Ti-11.5Mo-6Zr-4.5Sn alloy and Ti-15Mo-3C
r-3Sn-3Al or the like, or other titanium alloys may be used, and can be appropriately adopted according to the performance.

In this method of manufacturing a golf club head, first, the face member 10 is cold or hot forged and plastically deformed to form a predetermined curved shape, and the front and back grooves 10a are formed. I do. As the forging method, an appropriate method that is easy to work may be selected, and either hot forging or cold forging may be used. In addition, the upper surface portion 20 and the side peripheral bottom surface portion 22 are each pressed and molded into a predetermined shape. Thereafter, as shown in FIG. 4, the shaft mounting pipe 24 is fitted into the pipe holding recess 34 of the hollow portion 12 of the head body, and is fixed with a jig (not shown). The both side edges of the recess 34 are welded. Further, the lower end portion of the shaft mounting pipe 24 and the inner surface of the sole portion of the side peripheral bottom surface portion 22 are also welded.

Then, the weight 16 is welded into the side peripheral bottom surface portion 22, and the face surface member 10 is welded to the face surface mounting portion 14 of the side peripheral bottom surface portion 22. At this time, as shown in FIG. 5, the lower end portion of the face surface member 14 is attached so as to be fitted inside the sole portion of the side peripheral bottom surface portion 22, and the face mounting angle depends on the position of the face surface member 10. Is set. The welding is performed as shown in FIG.
The welded portion 30 is formed by welding with the side peripheral bottom surface portion 22 at the front and back portions of the 0 side peripheral surface. The weight 16 may be welded to the side peripheral bottom portion 22 in advance, but after the shaft mounting pipe 24 is attached, the weight 16 is welded after checking the weight balance of the side peripheral bottom portion 22. Thereafter, the upper surface portion 20 is welded to the upper edge portion of the face surface member 10 and the upper edge portion of the side peripheral bottom portion 22 from outside. These weldings can be appropriately selected, such as laser welding or electron beam welding. Thereafter, the shaft 26 is inserted into the shaft mounting pipe 24 and fixed with an adhesive or the like.

In the golf club head of this embodiment, the shaft mounting pipe 24 is fitted and welded to the pipe holding recess 34 formed in the side peripheral bottom surface 22 of the head body hollow portion 12, so that the pipe holding is performed. The shaft mounting pipe 24 stably and accurately held in the concave portion 34 is positioned and fixed stably at the time of welding, enabling welding at an accurate angle and having high strength. In addition, the thickness of the head body hollow portion 12 is relatively thin,
Since it is composed of mold titanium and the thickness of each part is almost equal, the center of gravity is located relatively upward, the blow-up of the hit ball is prevented, and the flying distance is drawn with a more ideal parabola Can be stretched.

Next, a second embodiment of the golf club head according to the present invention will be described with reference to FIGS. Here, the same members as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. In this embodiment, the face member 1
On the back side of 0, in the range that covers the part where the ball hits well,
A thin portion 18 is formed in a concave lens shape. Thin part 18
Are formed in a concave lens shape within a predetermined range from the center of the back surface. The thin portion 18 is cut by an NC machine or the like so as to become thinner toward the center. Also,
Other configurations and assembling methods are the same as in the above embodiment.

In the golf club head of this embodiment, since the thin portion 16 is formed, for example,
mm face face member, about 2.7 mm at the center
Degree, and the elasticity of the sweet spot of the face member 10 can be increased and widened.
Since the peripheral portion is formed thick, the strength is reliably ensured. Further, the weight of the face member 10 can be reduced, and the head itself can be reduced accordingly.

Further, the face member 10 may be provided with a plurality of ring members for reinforcement on the back surface by reducing the wall pressure as a whole. With this, the same effect as in the second embodiment can be obtained.

It should be noted that the golf club head of the present invention is not limited to the above embodiment, but may be made of titanium or a titanium alloy.
The present invention can be applied to a golf club head having an appropriate structure, such as one in which a hollow portion of a head body is integrally formed, one in which a face surface member and a shaft mounting pipe portion are integrally provided, and the like. The thin portion may be formed by forging instead of cutting. Further, in welding the pipe for mounting the shaft, in addition to welding to the inner surface of the sole part, a through hole may be formed in the sole part, and the tip of the pipe for mounting the shaft may be inserted into the through hole for welding. Thereby, the positioning accuracy can be further increased.

[0020]

According to the golf club head and the method of manufacturing the same of the present invention, the holding of the shaft mounting pipe is determined by the pipe holding recess in the hollow portion of the head body.
Since welding can be performed, the positional accuracy of the shaft can be increased, and the golf club head can be easily assembled. Further, since the thickness of the hollow portion of the head main body is relatively thin and the thickness of each portion is substantially equal, the position of the center of gravity is located relatively upward, and blow-up of a hit ball is prevented.

Further, since the hollow portion of the head body is made of various kinds of high-strength β-type titanium, and the thickness of each portion is substantially equal, the weight of the head body can be reduced and the strength can be increased. Further, the position of the center of gravity can be easily adjusted, and a golf club with a longer flight distance can be provided. Further, by forming a thin portion on the back surface of the face member, higher elasticity can be given while maintaining the strength of the face surface.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a first embodiment of a golf club head according to the present invention.

FIG. 2 is a perspective view of this embodiment.

FIG. 3 is a longitudinal sectional view of the golf club head of this embodiment.

FIG. 4 is a cross-sectional view of a neck portion of the golf club head of this embodiment.

FIG. 5 is an enlarged sectional view showing a welded portion of the face member of the golf club head according to the embodiment.

FIG. 6 is a perspective view of a second embodiment of the golf club head of the present invention.

FIG. 7A is a front view of the face member according to the embodiment (A).
FIG. 3 is a sectional view (B) of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Face surface member 12 Head main body hollow part 14 Face surface mounting part 20 Top surface part 22 Side peripheral bottom surface part 24 Shaft mounting pipe 26 Shaft 30 Welding part 34 Pipe holding concave part

Claims (5)

[Claims] 1. A head body hollow portion which is located behind the face surface member and which is hollow and has an open face surface mounting portion, wherein a shaft mounting pipe is welded to the head body hollow portion. In a golf club head formed by welding a face surface member to the face surface mounting portion, a pipe holding recess is provided at a welding position of the shaft mounting pipe in the head body hollow portion, and the head body hollow portion is made of titanium alloy. A golf club head characterized in that the thickness of each part is substantially equal. 2. The golf club head according to claim 1, wherein said head main body hollow portion comprises an upper surface portion and a side peripheral bottom surface portion. 3. The golf club head according to claim 1, wherein a plurality of shallow grooves are formed in parallel on the front and back surfaces of the face member. 4. A head body hollow portion which is located behind the face surface member and which is hollow and has an open face face mounting portion, wherein a shaft mounting pipe is welded to the head body hollow portion. In the method of manufacturing a golf club head, wherein the face surface member is welded to the face surface mounting portion, the head body hollow portion is formed by press molding, and at this time, the thickness of each portion of the head body hollow portion to be press molded And forming a pipe holding recess at the welding position of the shaft mounting pipe,
Thereafter, the shaft mounting pipe is brought into contact with the pipe holding recess and welded. 5. The golf club head manufacturing method according to claim 4, wherein said press forming is hot forging or cold forging.