JP4455243B2 - Golf club head and manufacturing method thereof - Google Patents

Description

  The present invention relates to a golf club head and a manufacturing method thereof.

In order to secure the flight distance of the hit ball using the repulsive force against the ball, as disclosed in Patent Documents 1 and 2, conventionally, the face portion of the head main body has a small specific gravity smaller than that of the head main body and high rebound characteristics. 2. Description of the Related Art An iron golf club head (hereinafter referred to as “head”) having a fixed face member (face plate) is known.
7 and 8 show the head disclosed in Patent Document 1. This head 1 extends from the face portion 5 to the back portion 7 (back side), leaving the peripheral portion 4 of the head body 3 made of stainless steel. A through-hole 9 is provided, and a thin plate-like face member 13 made of nickel beryllium alloy is fitted into a step portion 11 provided in the face-side opening of the through-hole 9, and its peripheral portion is inserted into the through-hole of the head body 3 . A cavity 15 is provided on the back side of the head 1 by laser welding to the peripheral wall 9 and being flush with the face portion 5.

9 and 10 show a cup face type head disclosed in Patent Document 2, and this head 17 is a thin cup-like shape having a jaw portion 19 projecting from the peripheral edge on the back side as shown in FIG. a face member 21, abutted against the face side peripheral portion 27 of the through hole 25 provided in the head body 23 obtained by laser welding the these joints, cavities 29 are provided on the back side of the head 17 .

Thus, according to these heads, the ball flying distance is extended by the repulsive force of the face member at the time of hitting, and the cavity is provided on the back side to distribute the weight to the periphery of the head. At times, the moment of inertia around the center of gravity of the head increased, and the directionality of the hit ball was stabilized.
Conventionally, arc welding has been widely used for mounting this type of face member. Generally, when arc welding is used, it is necessary to secure a gap for the weld bead between the members to be joined. However, in laser welding, it is not necessary to secure a gap for the weld bead between the members to be joined, and the welding width is about 4 mm. This is a welding method that has little thermal influence on the members to be joined and has excellent joining strength.
JP 2001-293115 A JP 2003-325710 A

However, although the welding width of laser welding is smaller than the welding width of arc welding as described above, a welding width of about 4 mm is still required for attaching the face member to the head body.
Therefore, in the head 1 of FIG. 7, when the face member 13 is attached, as shown in FIG. 11, the joint P between the peripheral edge portion 13a of the face member 13 and the peripheral wall 11a of the step portion 11 (through hole 3) is used as a boundary. Welding widths A and B (A + B = 4 mm welding width) addressed to 2 mm are required on the face member 13 side and the peripheral portion 4 side of the head main body 3, respectively. On the side, it was necessary to secure a dimension C of about 1 mm outward.

For this reason, the peripheral part 4 of the head body secures a thickness M (M = welding width B + dimension C + width dimension of the step portion 11) of 3 mm or more from the joint P in the top direction, the sole direction, and the toe direction. Although it is necessary, if further thinning of the peripheral part 4 is possible,
[1] By reducing the weight around the face, the center of gravity of the head can be further reduced,
[2] The sweet spot can be further expanded by deepening the center of gravity depth,
[3] By reducing the weight around the face, it is possible to adjust the wide weight balance of the entire head by redistributing weights.
[4] A wider face member can be used, and the flying distance at the time of hitting can be further extended by the large repulsive force.

  Similarly, in the head 17 shown in FIG. 9, when the face member 21 is attached, the face member 21 is joined at the joint P between the tip 19a of the jaw portion 19 and the face side peripheral portion 27 as shown in FIG. On the 21 side and the head main body 23 side, welding widths D and E (D + E = 4 mm welding width) addressed to 2 mm are required, respectively, and further on the back side of the head main body 23 for post-processing. It was necessary to secure a dimension F of about millimeters.

For this reason, it is necessary to secure a ball hitting direction width of 5 mm or more on the top side of the head main body 3. If the thickness of the ball hitting direction width on the top side can be reduced, [1] to [3] described above. In addition to the effect of
[5] The top-side hitting direction width becomes smaller, making it easier to hold at the time of addressing.
The present invention has been devised in view of such circumstances, and an object thereof is to provide a head that achieves the effects [1] to [5] and a method for manufacturing the head.

To achieve such object, the invention according to claim 1, leaving a peripheral portion of the head body, the peripheral wall off Esu member of the face side opening of the through hole provided over the back portion from the face portion periphery at a golf club head with a welded, the face side outer periphery of the peripheral portion of the head body, provided with a protrusion protruding from the face side outer peripheral outwardly face portion flush, through holes of the face securing the head main body side of the welding width of the side opening circumferential wall face member periphery, after welding of the face member periphery to the face-side opening wall of the through hole, grinding the protruding portion, formed by removing It is characterized by that.

According to the second aspect of the present invention, the peripheral portion of the head body protrudes from the peripheral portion of the back surface of the cup-shaped face member to the peripheral portion of the face of the through hole provided from the face portion to the back portion, leaving the peripheral portion of the head body. In the golf club head in which the provided jaw portion is abutted and these joint portions are welded, a convex portion protruding rearward of the head main body is provided on the back side peripheral portion of the through hole, and the face of the head main body is provided. characterized in that securing the head main body side of the weld width between the jaws of the side periphery and the cup-shaped face member, after the welding of the jaws to the face-side peripheral portion, comprising the protrusion grinding, it is removed And

The invention according to claim 3 provides a through hole from the face part to the back part, leaving the peripheral part of the head main body, and the peripheral part of the face member is formed on the peripheral wall of the face side opening part of the through hole. A method of manufacturing a golf club head to be welded, wherein a convex portion projecting outward from the outer periphery of the face side is provided on the outer periphery of the face side of the head body so as to be flush with the face portion. securing the head main body side of the welding width of the side opening circumferential wall face member periphery, after welding of the face member periphery to the face-side opening wall of the through hole, grinding the protruding portion, the removal Features.

According to a fourth aspect of the present invention, there is provided a through hole from the face part to the back part, leaving the peripheral part of the head body, and the back side of the cup-shaped face member is provided on the face side peripheral part of the through hole. A golf club head manufacturing method in which a jaw part protruding from a peripheral part is abutted and these joint parts are welded , and a convex part protruding rearward of the head main body is provided at a back side peripheral part of the through hole. Te, ensuring the head main body side of the welding width of the face-side peripheral portion and the jaw portion of the cup-shaped face member of the head body, after welding of the jaws to the face-side peripheral portion, grinding the convex portion, It is characterized by removing.

According to the first aspect of the present invention, it is possible to reduce the thickness of the peripheral portion as compared with the prior art.
For this reason, it is possible to further reduce the center of gravity of the head by reducing the weight around the face, and further widen the sweet spot by increasing the depth of the center of gravity, and by redistributing weights by reducing the weight around the face. It is possible to adjust the wide weight balance of the entire head, and it is also possible to use a wider face member than the conventional face member, so the flying distance at the time of hitting can be further extended by the large repulsive force. Has the advantage of being able to.

According to the head manufacturing method of the third aspect, it is possible to easily manufacture a head that exhibits the above-described effects.
Further, according to the invention according to claim 2, the hitting direction width on the top side is smaller than in the prior art, so that it is easier to hold at the time of addressing, and the center of gravity of the head can be further reduced by reducing the weight around the face, In addition, the sweet spot can be further expanded by increasing the depth of the center of gravity, and further, the weight reduction around the face makes it possible to adjust the wide weight balance of the entire head by redistributing the weight. .

  According to the method for manufacturing a head according to the fourth aspect, it is possible to easily manufacture a head that exhibits the above-described effects.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 4 show an embodiment of a head according to claim 1. In FIG. 1, reference numeral 31 denotes an iron in which a hosel portion 33, a sole portion 35, a face portion 37, etc. are integrally cast of titanium-based metal. In order to increase the moment of inertia at the time of hitting in the head body of FIG. 2, a cavity 43 is provided on the back portion 39 side of the head body 31 leaving the peripheral portion 41 of the head body 31 as shown in FIG. With such a configuration, the weight of the head body 31 is dispersed in the peripheral portion 41 so that the directionality of the hit ball is stabilized.

Thus, as shown in FIG. 2, the cavity 43 is provided with a through hole 45 from the face portion 37 to the back portion 39 while leaving the peripheral portion 41 of the head main body 31, and the face side of the through hole 45. the receiving portion 4 7 provided in the opening, is fitted a thin-walled plate-like face member 49 forged titanium-based metal, FIG. 3 and its peripheral portions 51 and the receiving portion 47 as shown in FIG. 4 (through hole 45) The face member 49 is flush with the face portion 37 and forms the face surface (ball striking surface) of the head 55 together with the face portion 37.

The face member 49 is formed with a uniform thickness of 2 mm at the peripheral edge.
In addition, as shown in FIG. 3, in this embodiment, CO ₂ laser welding is used in which the cross-sectional shape of the melted portion Q tapers to the deepest portion of the melt. Welding may be used, and plasma welding may be used instead of laser welding.

The head 55 as shown in FIGS. 3 and 4, by the convex portion 57 to be described later, the joint portion P to the face member 49 side and the peripheral portion 41 side to the boundary at the time of manufacture, each welding destined 2mm The widths G and H are secured. The receiving portion 47 protrudes with a protruding width I of 0.8 mm over the entire circumference of the face side opening of the through hole 45, and thus the peripheral portion 41 of the head body 31 is formed by the convex portion 57. By securing a welding width H of 2 mm on the side, in this embodiment, the peripheral portion 41 can be set to a thickness K of 2.8 mm from the top side to the toe side and the sole side. The peripheral portion 41 is made thinner than the head 1 of FIG.

The receiving portion 47 may be omitted. By omitting the receiving portion 47, the peripheral portion 41 can be further thinned to 2 mm.
Then, after the grinding process of the convex portion 57 described later, the melted portion Q has a weld width J of less than 4 mm as shown in FIG. 3 and the face of the peripheral portion 41 from the face surface side along the outer shape of the head body 31. It is exposed across the outer periphery. As shown in FIG. 3, the top-side hitting direction width L of the head 55 is 5 mm.

The head 55 according to the present embodiment is configured as described above, and the head 55 is manufactured as follows by one embodiment of the inventive method according to claim 3.
As shown in FIGS. 4 and 5, in manufacturing the head main body 31 having the through holes 45 and the receiving portions 47, the same thickness as the face member 49 is formed on the outer periphery of the outer edge 41-1 of the peripheral portion 41 on the face side. a convex portion 57 having, to project from the top portion 37 to the toe side, the outer face side outer circumference face portion 37 flush along the sole portion 35.

The convex portion 57 protrudes outward from the outer periphery on the face side with a height of 1 mm, and as shown in FIG. While the wall thickness K from the inner wall 56 of 41 to the outer edge 41-1 is set to 2.8 mm, the welding width H can be secured on the head body 31 side.
As shown in FIG. 4, after the face member 49 is fitted into the receiving portion 47, the joint portion P between the peripheral portion 51 of the face member 49 and the peripheral wall 53 of the receiving portion 47 is laser-welded. The peripheral walls 53 are joined by being melted and cured with welding widths G and H of 2 mm, respectively.

Thereafter, the convex portion 57 may be ground along the outer edge 41-1 of the peripheral portion 41 to the outer shape of the head main body 31 as shown by a two-dot chain line in FIG. 4, and as shown in FIG. As a result of this grinding, the melted portion Q having a weld width J of slightly less than 4 mm from the face side to the outer edge of the peripheral portion 41 along the outer shape of the head 55 is transferred from the face surface side of the head body 31 to the peripheral portion 41. Exposed on the outer periphery of the face side. Thereafter, the entire head main body 31 to which the face member 49 is fixed is polished, and a final process such as painting is performed to complete the head 55 as a product.

As described above, in the present embodiment, when laser welding the face member 49 to the receiving portion 47 , the convex portion 57 is formed outwardly of the outer periphery of the face side as shown in FIG. Since a welding width H of 2 mm was secured on the head body 31 side by projecting to the head body 31, it was necessary to secure a thickness M (M = welding width B + dimension C + width dimension of the step portion 11) as shown in FIG. As compared with the conventional example, the thickness K of the peripheral portion 41 can be formed to be equal to or less than the thickness obtained by adding the protruding width I and the welding width H of the receiving portion 47.

Therefore, according to this embodiment, compared with the conventional example of FIG.
[1] By reducing the weight around the face, the center of gravity of the head 55 can be further lowered,
[2] The sweet spot can be further expanded by deepening the center of gravity depth,
[3] By reducing the weight around the face, it is possible to adjust the wide weight balance of the entire head 55 by redistributing weights.
[4] Since the face member 49 that is wider than the conventional face member 13 can be used, there is an advantage that the flying distance at the time of hitting can be further extended by the large repulsive force.

Also, as shown in FIG. 3, in this embodiment, the thickness (K-I) of the peripheral portion 41 from the peripheral wall 53 to the outer edge 41-1 is 2 mm, which is the same as the welding width H, and the peripheral portion 41 is thinned. However, as shown in the broken line in FIG. 4, as shown in FIG. 4, the convex portion 57 protrudes outwardly on the face side outer periphery of the peripheral portion 41 to secure the welding width H on the head body 31 side. It is possible to use a wider face member by further shifting the melted portion Q outward and further thinning the peripheral portion to widen the through hole (face side opening). According words, since the thickness of the peripheral portion 41 of the peripheral wall 53 shown in FIG. 3 to the outer edge 41-1 (K-I) is formed below the weld width H, compared to the conventional through-hole (the face side opening ) Can be expanded.

In the present embodiment, the convex portion 57 projecting from the outer periphery of the peripheral portion 41 on the face side is ground along the outer edge 41-1, so that the outer shape of the head 55 can be accurately obtained. The head 55 is well balanced.
According to the head manufacturing method of the third aspect, it is possible to easily manufacture the head 55 having the above-described effects, and this embodiment projects to the outer periphery of the peripheral portion 41 on the face side. Since the provided convex portion 57 is ground along the outer edge 41-1 of the peripheral portion 41, the outer shape of the head 55 can be accurately obtained, and as a result, a well-balanced head 55 can be manufactured.

When the face member and the head main body are laser welded, and both the members are melted and the joint portion P is not clear, the head manufactured by the manufacturing method of this embodiment using CO ₂ laser welding is the embodiment shown in FIG. since the melting unit as it is formed in the cross-sectional shape of the tapered from its deepest portion of the face member side molten bond width to the outermost can be grasped as a weld width G, the head body that weld width G The welding width H can be set.

In addition, when using YAG laser welding where the cross-sectional shape of the deepest part tends to be flat, the width from the middle of the deepest part of the molten part to the outermost side of the melted part on the face member side can be grasped as the welding width G. When manufactured by the manufacturing method of the present invention, the thickness (K-I) of the peripheral portion 41 from the peripheral wall 53 to the outer edge 41-1 can be a head having a welding width G or less.
FIG. 6 shows an embodiment of the cup face type head according to claim 2, in which 59 is a thin cup-shaped face member with a jaw 61 projecting from the peripheral edge on the back side, similar to the head 17, the head 63 according to the present embodiment is also abutted against the distal end 71 of the jaw 61 on the face side peripheral portion 69 of the through hole 67 provided in the head main body 65, and laser welding the these joints A cavity 73 is provided on the back side of the head 63.

The head main body 65 and the face member 59 are made of the same material as the head main body 31 and the face member 49, respectively.
In the present embodiment, in order to realize the effects [1] to [3] and [5] described above, a protrusion projecting rearward of the head main body 65 on the back side peripheral portion 75 of the through hole 67. 77 is provided, which secures the weld width N of the head body 65 side of the jaw 61, after welding of the face member 59, grinding the protruding portion 77 along the original outer shape head body 65, is removed It is.

And Thus, the head 63 is manufactured as follows according to an embodiment of the invention a method according to claim 4.
As shown in FIG. 6, in manufacturing the head main body 65 having the through hole 67, a convex portion 77 protruding rearward of the head main body 65 is formed on the back side peripheral portion 75 of the through hole 67 from the top side to the sole. Provided integrally over the side.

The protrusion 77 protrudes rearward with a thickness of 2 mm or more, and the protrusion 77 can secure the welding width N on the head body 65 side.
Then, as shown in the figure, the head main body 65 (convex portion 77) and the face member 59 can be obtained by abutting the distal end 71 of the jaw portion 61 against the face side peripheral portion 69 of the head main body 65 and laser welding these joint portions P. The (jaws 61) are melted and cured with a welding width N and O of 2 mm, respectively, and joined.

Thereafter, the convex portion 77 may be ground along the outer shape of the back side peripheral portion 75 of the head main body 65 indicated by the two-dot chain line in FIG. 6, and the convex portion 77 is ground along the outer shape of the head 63. The melted portion Q having a welding width of 4 mm or less from the back side peripheral portion 75 to the face member 59 is exposed. Thereafter, the entire head main body 65 to which the face member 59 is fixed is polished, and a final process such as painting is performed to complete the head 63 as a product.

As described above, in the present embodiment, when the cup-shaped face member 59 is laser-welded to the face-side peripheral portion 69 of the head main body 65, the protrusion protruding backward is formed on the back-side peripheral portion 75 of the through hole 67 of the head main body 65. Since the weld width N with the face member 59 is secured by providing the portion 77, in addition to the effects [1] to [3] described above, compared to the conventional example of FIG.
[5] The advantage is that the top-side hitting direction width is reduced and it is easy to hold at the time of addressing.

  In each of the above-described embodiments, the head main body and the face member are cast and forged with titanium-based metal, but it is needless to say that the present invention is not limited to these materials.

It is a front view of the head concerning one embodiment of Claim 1. It is the II-II sectional view taken on the line of FIG. It is a principal part expanded sectional view after the welding of a head main body and a face member. It is an important section expanded sectional view before welding of a head main part and a face member. It is a front view of a head body. It is a principal part expanded sectional view before welding of the head main body and face member of a head concerning one embodiment of Claim 2. It is sectional drawing of the conventional head. FIG. 8 is an exploded perspective view of the head shown in FIG. 7. It is a disassembled perspective view of the other conventional head. FIG. 10 is a cross-sectional view of the head shown in FIG. 9. It is an expanded sectional view of the welding part of the head main body and face member of the head shown in FIG. FIG. 10 is an enlarged cross-sectional view of a welded portion between a head main body and a face member of the head shown in FIG. 9.

Explanation of symbols

31, 65 Head body 35 Sole part 37 Face part 39 Back part 41 Peripheral part 43, 73 Cavity 45, 67 Through hole 47 Receiving part 49, 59 Face member 51 Peripheral part 53 Perimeter wall 55, 63 Head 57, 77 Convex part 61 Jaw Portion 69 Peripheral portion 71 Face side Periphery tip 75 Back side peripheral portion P Joint portion Q Melting portion

Claims (4)

Leaving the peripheral portion of the head body, At a golf club head with a welded peripheral portion of the peripheral wall in full Esu member of the face side opening of the through hole provided over the back portion from the face portion,
The face side outer periphery of the peripheral portion of the head body, the head of the relevant from the face side periphery provided with a protrusion protruding outward on the face portion and the flush face side opening wall of the through hole and the face member periphery Secure the welding width on the main body side ,
A golf club head, wherein the convex portion is ground and removed after the peripheral edge of the face member is welded to the peripheral wall of the face-side opening of the through hole. With the peripheral part of the head body remaining, the jaw part projecting from the peripheral part on the back side of the cup-shaped face member is abutted against the peripheral part on the face side of the through hole provided from the face part to the back part . In a golf club head with a welded joint ,
A convex portion that protrudes rearward of the head main body is provided on the back side peripheral portion of the through hole to secure a weld width on the head main body side between the face side peripheral portion of the head main body and the jaw portion of the cup-shaped face member. ,
A golf club head, wherein the convex portion is ground and removed after the jaw portion is welded to the peripheral portion on the face side. This is a golf club head manufacturing method in which a through hole is provided from the face part to the back part, leaving the peripheral part of the head body, and the peripheral part of the face member is welded to the peripheral wall of the face side opening of the through hole. And
The face side outer periphery of the peripheral portion of the head body, the head of the relevant from the face side periphery provided with a protrusion protruding outward on the face portion and the flush face side opening wall of the through hole and the face member periphery Secure the welding width on the main body side ,
A method for manufacturing a golf club head, comprising: grinding and removing the convex portion after welding of a peripheral portion of the face member to the peripheral wall of the face side opening of the through hole. A perforation is provided from the face part to the back part, leaving the periphery of the head body, and the jaw part protruding from the peripheral part on the back side of the cup-shaped face member is projected to the face side periphery of the perforation. A method of manufacturing a golf club head that applies and welds these joints ,
A convex portion that protrudes rearward of the head main body is provided on the back side peripheral portion of the through hole to secure a weld width on the head main body side between the face side peripheral portion of the head main body and the jaw portion of the cup-shaped face member. ,
A method of manufacturing a golf club head, comprising grinding and removing the convex portion after welding the jaw portion to the peripheral portion on the face side.

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