JP3707718B2 - Golf club head and manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a golf club head and a manufacturing method.
[0002]
[Prior art]
Conventionally, as shown in FIGS. 6 to 8, in order to fix the additional member 33 made of a different metal having a specific gravity larger than the metal material of the head body 31 to the head body 31 for the purpose of lowering the center of gravity of the golf club head or the like. The additional member 33 is composed of an additional member main body 34 and a plurality of small pieces 35 projecting from the additional member main body 34, and the additional member 33 has a through-hole 32 for attachment. The small piece portion that is fitted into the through-hole 32 and is caulked in an expanded shape so as to be in pressure contact with the inner surface 38 of the head main body 31, and is caulked by the pressing plate 36 from the inner surface 38 side of the head main body 31. 35, and the presser plate 36 was welded and fixed to the head body 31.
[0003]
[Problems to be solved by the invention]
However, the conventional golf club head has a problem in strength and is expensive.
Accordingly, an object of the golf club head according to the present invention is to provide a golf club head and a manufacturing method capable of improving strength, improving workability, and reducing costs.
[0004]
[Means for Solving the Problems]
In order to achieve the above-described object, a golf club head according to the present invention includes a dissimilar metal additional member fitted to the through-hole of the shell-like head main body having a mounting through-hole, and a plurality of additional member main bodies. the additional members shown for staking projecting from the body and the entire circumference upright wall portion consists, caulked to the standing wall part so as to press the inner surface of the head body which has a widening for notch of The additional member is fixed to the head main body, the through hole has a downwardly enlarged tapered shape, the additional member main body is composed of a downwardly enlarged block body having a shape corresponding to the through hole, and the enlarged member. The width dimension of the opening notch is 1 mm or less, and the thickness T of the standing wall is set to 1 mm ≦ T ≦ 3 mm, and the height H of the standing wall is , Ru 2 mm ≦ H ≦ 8 Monodea set in mm. Further , the presser plate that presses the upright wall portion crimped in an expanded shape is omitted.
[0005]
Also, the golf club head manufacturing method according to the present invention is for caulking in which a mounting hole having a downwardly enlarged tapered shape is formed on the head body side, and on the other hand, a plurality of expanding notches are provided on the additional member side. The substantially entire circumferential standing wall portion is formed in a protruding shape, the additional member main body of the additional member is formed in a lower enlarged block body having a shape corresponding to the through hole, and the additional member main body is formed on the head main body side. inlaid in transmural hole mounting, the substantially entire circumference upright wall portion protruding to the inner surface side of the head main body crimped to expanding shape, a method of pressure-fixed to the inner surface side.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments of the present invention.
[0007]
1 to 5 show an embodiment of the present invention, and the head body 1 has a mounting through hole 2 on the sole surface 11 side. On the other hand, the additional member 3 made of a different metal such as brass is composed of an additional member main body 4 and a caulking substantially all-around standing wall portion 6 having a notch portion for expansion projecting from the additional member 4. . The said through-hole 2 shows the case where it is an ellipse (or ellipse) of a downward expansion taper shape. Further, the additional member main body 4 has a shape corresponding to the through hole 2 and is composed of a downward enlarged block body.
[0008]
The additional member main body 4 is fitted into the through hole 2 of the head main body 1 and is caulked in an expanded shape so that the upright wall portion 6 protruding toward the inner surface 7 of the head main body 1 is pressed against the inner surface 7 of the head main body 1. The inner surface 7 is fixed by pressure. In addition, the width dimension W of the notch part 5 is set to 1 mm or less. If the width dimension W is larger than 1 mm, the caulking strength becomes small, and it is necessary to reinforce the fixing force with a presser plate, etc. it can.
[0009]
Further, the thickness dimension T of the standing wall portion 6 is set to 1 mm ≦ T ≦ 3 mm, and the height dimension H of the standing wall portion 6 is set to 2 mm ≦ H ≦ 8 mm. If the thickness dimension T is smaller than 1 mm, the strength is insufficient. If the thickness dimension T is larger than 3 mm, the material is wasted, and the force required for caulking is also large. If the height dimension H is smaller than 2 mm, the strength is insufficient, and if it is larger than 8 mm, the material is wasted.
[0010]
Next, a manufacturing method will be described. First, a plurality of members constituting the shell-like head main body 1 (a divided shape is not shown) are produced by casting, forging, pressing, or the like. Next, the through-hole 2 is formed in at least one member among the constituent members of the head main body 1 --- the sole plate member 8 in the illustrated example. On the other hand, the additional member 3 composed of the additional member main body 4 and the caulking substantially all-around standing wall portion 6 is produced by casting and machining. The shape of the additional member main body 4 is substantially the same as that of the through hole 2. And several notch part 5 ... is formed in the standing wall part 6 by cutting.
[0011]
The additional member main body 4 of the additional member 3 is fitted into the through hole 2 of the member 8, and the upright wall portion 6 protruding toward the inner surface 7 of the head main body 1 of the member 8 is caulked in an expanded shape so It adheres with pressure contact. The members (including the member 8) constituting the head body 1 are connected to each other by welding or the like to form a golf club head.
[0012]
The design of the present invention can be changed. For example, the additional member 3 may be fixed by forming the through hole 2 in a member other than the sole plate member 8. Further, the through hole 2 may be formed in advance when the member 8 is cast, and the notches 5... May be formed in advance when the additional member 3 is cast. Further, in the present invention, the “shell shape” does not necessarily indicate a hollow shell shape, but also includes those in which a foamed resin is filled inside the shell. That is, the foamed resin may be filled before and after the head body is welded.
[0013]
【Example】
The additional member 3 shown in FIG. 3 was manufactured by casting brass and was press-fixed to a separately manufactured sole plate member 8 (shown in FIG. 2) made of titanium alloy as shown in FIGS. Next, the sole plate member 8 and other members were welded and integrated to form a shell-like head main body 1, and a shaft and a grip were attached to the head main body 1 to produce a golf club head.
[0014]
Using this golf club head, an actual hit test using a golf club swing robot was performed. The head speed was 50 m / s, the hitting position was the center of the face surface, and the number of hits was 1000 shots. As a result of this actual hitting test, no abnormality was found in the head including the joint portion of the additional member 3. That is, sufficient strength was ensured.
[0015]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
[0016]
Crimping strength (good lever in claim 1) is large, excellent in strength and durability.
(According to claim 2 ) Manufacturing is simplified and cost reduction can be achieved.
(According to claim 3 ) Since there is no work for producing and welding the presser plate, workability is improved. The golf club head manufactured according to the present invention has a high caulking strength and is excellent in strength and durability.
[Brief description of the drawings]
FIG. 1 is an overall perspective view showing an embodiment of the present invention.
FIG. 2 is a bottom view.
FIG. 3 is an overall perspective view of an additional member.
FIG. 4 is a cross-sectional view of a main part.
FIG. 5 is a partially broken plan view.
FIG. 6 is a cross-sectional view of a main part showing a conventional example.
FIG. 7 is a partially broken plan view of a conventional example.
FIG. 8 is a perspective view of a conventional additional member.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Head main body 2 Through-hole 3 Additional member 4 Additional member main body 5 Notch part 6 Standing wall part 7 Inner surface W Width dimension

Claims (3)

An additional member 3 made of a dissimilar metal and fitted into the through-hole 2 of the shell-like head body 1 having the mounting through-hole 2 has an additional member main body 4 and a plurality of notches 5 for expansion. a member body 4 staking for substantially entire circumference upright wall portion 6 projecting from, made, the the standing wall part 6 is crimped so as to press the inner surface 7 of the head body 1, the additional member 3 Fixed to the head body 1 ;
The through hole 2 has a downwardly enlarged tapered shape, and the additional member main body 4 is composed of a downwardly enlarged block body having a shape corresponding to the through hole 2,
And the width dimension W of the said notch part 5 for expansion is 1 mm or less, and also the thickness dimension T of the said standing wall part 6 is set to 1 mm <= T <= 3 mm , and the said standing wall A golf club head characterized in that a height dimension H of the portion 6 is set to 2 mm ≦ H ≦ 8 mm . 2. The golf club head according to claim 1, wherein a presser plate that presses the standing wall portion caulked in an expanded shape is omitted. A downwardly expanding tapered mounting through hole 2 is formed on the head main body 1 side, and on the other hand, a caulking substantially all-around standing wall portion 6 having a plurality of expanding notch portions 5 is projected on the additional member 3 side. The additional member main body 4 of the additional member 3 is formed in a downward enlarged block body having a shape corresponding to the through hole 2, and the additional member main body 4 is formed in the mounting through hole on the head main body 1 side. The golf club head manufacturing method is characterized in that the substantially entire circumferential upright wall portion 6 that fits into the head body 1 and protrudes toward the inner surface 7 side of the head body 1 is caulked in an expanded form and is pressed and fixed to the inner surface 7 side. .

Images