JP2001029523A - Golf club head and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head in which a head body with an opening part for the main purpose of distributing the weight of a head to the periphery of a face surface and a face surface member with an adjusted wall thickness are integrally fastened to each other, and its manufacture. SOLUTION: In a golf club head formed by forming a face surface member 5 into a different body from a head body 1 and press-fitting the peripheral edge part 6 of the face surface member 5 into the opening part 4 of the head body 1, a thin wall part 8 thinner than the peripheral edge part 6 is provided for at least a part of the back surface of the face surface member 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head in which a head body having an opening and a face member are formed separately for the main purpose of distributing the weight of the head to the periphery of the face. In addition, a golf club head capable of improving the resilience of the face surface by adjusting the thickness of the face surface member is provided.

Further, the present invention relates to a golf club head in which a head body and a face member are formed separately from each other, and the yield is reduced when the face member whose thickness is adjusted is fitted and fixed to the head body. A technique for producing a golf club head is provided.

[0003]

2. Description of the Related Art Heretofore, a golf club head in which a head body and a face surface member are formed of different metals separately for the main purpose of distributing the weight of the head around the face surface, A technique of press-fitting and fixing the face member to an opening or a concave portion of the main body is used.

In a cavity back type golf club head in which the head is integrally formed or the head body and the face member are formed separately, the rebound of the face surface is improved and the weight distribution of the head is adjusted. For the purpose, at least a part of the back side of the face
A technique of forming a thin portion by C-cutting has also been disclosed.

Further, in order to prevent deformation of the face member at the time of press fitting, the thickness of the face member is made uniform, and after the face member is press-fitted and fixed to the opening of the head body, it is subjected to NC machining. A technique of forming a thin portion on the back surface side of the face surface member is also used.

[0006]

However, in the prior art described above, when the separately formed face member is press-fitted and fixed to the opening of the head body, the face member is moved toward the cavity by the pressure at the time of press-fitting. Due to the deformation, it is difficult to press-fit and fix the face member having the thin peripheral portion on the back surface side of the face member to the head main body.

In a technique of forming a thin portion on the back side of the face member by NC cutting after the face member having a uniform thickness is pressed into the head body, an opening of the head body is formed. The movable area of the NC cutting blade is limited by the shape and depth of the frame to be formed, and it is particularly difficult to cut the vicinity of the boundary between the frame and the face member to form a thin portion.

[0008]

In order to solve the above problems, a golf club head according to the present invention is configured as follows. That is, the golf club head according to claim 1, wherein the face member is formed separately from the head body, and the peripheral edge of the face member is fitted and fixed to the opening of the head body. 3. The golf club head according to claim 1, wherein a thin portion having a smaller thickness than the peripheral portion is provided on at least a part of the back surface of the face member.

In the golf club head according to the present invention, when the face member is fitted and fixed to the opening of the head body, the entire back surface of the face member exposed from the opening is covered with the peripheral edge. The golf club head according to claim 1, wherein the thin portion has a smaller thickness than the portion.

In the golf club head according to the third aspect, when the face member is fitted and fixed to the opening of the head main body, the upper half of the back surface of the face member exposed from the opening is formed. The golf club head is characterized in that the thin portion has a smaller thickness than a peripheral portion.

In the golf club head according to the present invention, when the face member is fitted and fixed to the opening of the head body, the lower half of the back surface side of the face member exposed from the opening is formed. The golf club head is characterized in that the thin portion has a smaller thickness than a peripheral portion.

In the golf club head according to the present invention, when the face member is fitted and fixed to the opening of the head body, the face member exposed from the opening has a lower surface than the toe side. The golf club head is characterized in that the region is a thin portion having a smaller thickness than the peripheral portion.

In the golf club head according to the present invention, when the face member is fitted and fixed in the opening of the head body, the face member exposed from the opening is located on the back side of the face member from the heel side. The golf club head is characterized in that the region is a thin portion having a smaller thickness than the peripheral portion.

In the golf club head according to the present invention, when the face member is fitted and fixed to the opening of the head main body, the vicinity of the center on the back surface side of the face member exposed from the opening is provided. The golf club head is characterized in that the thin portion has a smaller thickness than the peripheral portion.

In the golf club head according to the present invention, when the face member is fitted and fixed to the opening of the head body, the vicinity of the peripheral edge on the back surface side of the face member exposed from the opening is provided. The golf club head is characterized in that the thin portion has a smaller thickness than the peripheral portion.

In the golf club head according to the ninth aspect, the face member may be made of pure titanium, a titanium alloy,
US630 steel, maraging steel, aluminum alloy,
The golf club head according to any one of claims 1 to 3, wherein the golf club head is made of any one of a nickel alloy, a magnesium alloy, a copper alloy, a beryllium alloy, and an amorphous alloy.

According to a tenth aspect of the present invention, in the golf club head, the peripheral portion of the face member has a thickness of 2.0 to 2.0.
Each of the golf club heads is 3.0 mm, and the thickness of the thin portion is 50 to 90% of the thickness of the peripheral portion.

The golf club head according to the present invention is manufactured by the following method. That is, the face member is formed separately from the head body, and a thin portion having a thickness smaller than the peripheral portion is formed on at least a part of the back surface of the face member in advance by forging or NC cutting. It is manufactured by fitting the peripheral portion of the face member into the opening of the main body and forging and fixing.

[0019]

Embodiments of the present invention will be described. A golf club head according to the present invention relates to a golf club head in which a face member is formed separately from a head body, and a peripheral portion of the face member is fitted and fixed to an opening of the head body.

The material used for the head body is pure titanium, titanium alloy, SUS630 steel, maraging steel,
Aluminum alloy, nickel alloy, magnesium alloy,
A metal material such as a copper alloy and a beryllium alloy, which has been conventionally used for golf club heads, is appropriately selected from metal materials having such a plasticity that the face member can be fitted and fixed by press fitting.

The head body has a hosel portion for attaching a golf shaft, a neck portion, and a head body, and the head body is provided with an opening penetrating from the front side to the back side, and the shape of the opening is as described above. It substantially matches the outer peripheral shape of the face member. A support portion for receiving the face surface member from the back side of the head main body is provided on an inner peripheral surface of the opening,
The support and the peripheral edge of the face member abut.

The material used for the face member is made of a metal material that can be cut or forged with high strength and high resilience. Specifically, pure titanium, titanium alloy, S
US630 steel, maraging steel, aluminum alloy,
It is appropriately selected from nickel alloy, magnesium alloy, copper alloy, beryllium alloy and the like. The face member is the metal plate having a thickness of about 2.0 to 3.0 mm, a score line is engraved on a front surface side, and a peripheral portion and a peripheral portion are provided on a back surface side. A thinner portion having a smaller thickness is formed. Although the width of the peripheral edge is not particularly limited, it is at least equal to or greater than the width of the supporting portion provided around the peripheral edge of the opening of the head main body, and specifically, about 2.0 to 5.0 mm. Is preferred. The peripheral portion of the face member should have a thickness of 2.0 to 3.0 mm so as to withstand deformation of the outer peripheral portion when the face member is press-fitted and fixed to the head body.

The thickness of the thin portion is 50 to 90% of the thickness of the peripheral portion, that is, 1.0 to 90%.
It is about 2.7 mm, and is set to a range where sufficient strength can be maintained in relation to the thickness of the region other than the thin portion.
In this case, if the thickness of the thin portion is 1.0 mm or less, the strength of the face member is significantly reduced, so that there is a possibility that breakage such as cracking may occur at the time of hitting the ball. On the other hand, if the thickness is 2.7 mm or more, the difference from the face member itself becomes small, and the intended purpose of improving the resilience by the thin portion cannot be achieved.

In the golf club head according to the present invention, when the face member is fitted and fixed to the opening of the head body, at least a part of the back surface of the face member exposed from the opening is formed at the peripheral edge. Although it is formed as a thin portion having a smaller thickness, it is also possible to make the entire back surface of the face surface member exposed from the opening portion a thin portion.

That is, when the face surface member is fitted and fixed to the opening of the head main body, when the back surface side of the face surface member exposed from the opening is formed as a partially thin portion, the exposed area of the exposed region is reduced. The upper half, the lower half, the area from the toe side, the area from the heel side, any one area near the center or the periphery, or an area obtained by appropriately combining these areas is thinner than the periphery of the face member. Part.

The golf club head according to the present invention is manufactured by the following method. That is, the face member is formed separately from the head body. The face member is formed of a plate having a predetermined outer shape by a conventionally used method such as press working using the predetermined metal material, and a thin wall having a thickness smaller than a peripheral portion on a back surface of the plate. The portion is formed by forging or NC cutting. When the thin portion is formed by forging, the plate-shaped body is fixed to a predetermined jig with the back surface facing upward, and forged by a press die corresponding to the shape of the thin portion from above. In the case where the thin portion is formed by NC cutting, a numerically controlled cutting lathe in which a back surface side of the plate-like body is fixed to a predetermined jig with the upper surface facing upward, and a movable area is set in the shape of the predetermined thin portion. Then, the thin portion is formed.

The head main body is formed of the above-mentioned predetermined metal material by a conventionally used method such as forging or casting. The head body according to the present invention is formed with an opening that penetrates from the front side to the back side of the face surface and has substantially the same shape as the outer peripheral shape of the face surface member. A support portion is provided on the inner peripheral surface of the opening, and the face surface member is fitted into the opening so that the peripheral portion of the face surface member comes into contact with the support portion, and the face surface member faces upward. It is manufactured by fixing to a predetermined jig so as to face and forging and fixing from above.

The method of forging and fixing is a conventionally used method. For example, a built-up portion is provided around the opening end of the opening, and the built-up portion is crushed by forging. A method of fixing, or a method of fixing by forming a deformable metal in an opening of a fine gap generated between an outer peripheral wall of the face surface member and an inner peripheral wall of the opening and forging from above. Alternatively, the inner peripheral wall of the opening is formed in an undercut shape from the opening end toward the support portion, and the outer peripheral wall of the face surface member is press-fitted from the opening end. Is fixed along the inner peripheral wall.

[0029]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a golf club head according to the present invention will be described with reference to the drawings. FIG. 1 is a rear view of the golf club head according to the present embodiment. An opening 4 of the head main body 1 has a face member 5 formed separately in advance.
Are fitted and fixed.

The material used for the head body 1 according to the present embodiment is SUS630 steel, which is stainless steel. The method of forming the head body 1 is appropriately selected from a conventionally used casting method and forging method.

The head body 1 has a hosel part 2 for attaching a golf shaft and a neck part 3, and the head body 1 is provided with an opening 4 penetrating from the front side to the back side as shown in FIG. The shape of the opening 4 substantially matches the outer peripheral shape of the face member 5. A support portion 7 for receiving the face surface member 5 from the back side of the head main body is provided on an inner peripheral surface of the opening 4, and the support portion 7 and the peripheral edge portion 6 of the face surface member 5 are in contact with each other.

The material used for the face member 5 according to the present embodiment is a beryllium-nickel alloy which can be cut or forged with high strength and high repulsion, but is not particularly limited to this alloy. Absent. The face member is a plate member of a beryllium-nickel alloy having a thickness of 2.3 mm, a score line is engraved on the front surface side, and a peripheral portion 6 and a thin wall member having a thickness of 2.0 mm are formed on the back surface side. A part 8 is formed. The width of the peripheral portion 6 is 5.0 m soon.
m, which is equal to the width of the support 7. The thickness of the peripheral portion 6 of the face surface member 5 is determined when the face surface member 5 is press-fitted and fixed to the opening 4 of the head body 1.
The peripheral portion 6 is formed to have a thickness of 2.3 mm so as not to be deformed.

In the present embodiment, the thickness of the thin portion 8 is 2.0 mm and the thickness of the peripheral portion 6 is 2.3 mm.
% Of the face member 5 while maintaining sufficient strength.
Was able to improve the coefficient of restitution.

In this embodiment, the thin portion 8 is formed as shown in FIG.
As shown in FIG. 3A, when the face member 5 is fitted and fixed in the opening 4, almost the upper half of the back surface side exposed area of the face member 5 exposed from the opening 4 is thinned 8. However, although not shown, the face surface member 5 is exposed from the opening 4, the entire back side (b) of the face surface member 5, the region (c) from the heel side, the region (d) from the toe side, It is possible to make the thin portion 8 a lower half on the back side of 5, any region near the center or near the periphery, or a region in which these are appropriately combined.

The golf club head according to the present invention is manufactured by the following method. The face member 5 according to the present embodiment uses the beryllium-nickel alloy to form a plate having the outer shape shown in FIG. 3 by a conventionally used method such as press working, and forms a plate on the back surface of the plate. Rim 6
The thin part 8 having a smaller thickness is formed by forging or N
It is formed by C cutting. When the thin portion is formed by forging, the plate-shaped body is fixed to a predetermined jig with the back surface facing upward, and forged by a press die corresponding to the shape of the thin portion from above. In the case where the thin portion is formed by NC cutting, a numerically controlled cutting lathe in which a back surface side of the plate-like body is fixed to a predetermined jig with the upper surface facing upward, and a movable area is set in the shape of the predetermined thin portion. Then, the thin portion is formed.

The head body 1 according to the present embodiment is a SUS6
It is formed by a casting method using a 30 steel material. A support portion is provided on the inner peripheral surface of the opening, and the face surface member is fitted into the opening so that the peripheral portion of the face surface member comes into contact with the support portion, and the face surface is upwardly directed toward the front side of the face surface. It is manufactured by fixing to a predetermined jig so as to face and forging and fixing from above.

In the present embodiment, the method of forging and fixing the face member is a conventionally used method. For example, as shown in FIG. A method is used in which the overlaid portion 10 is provided around, and the overlaid portion 10 is crushed and fixed by forging. The head body 1 is fitted into the lower mold 11 shown in FIG. 4, and the upper mold 12 is moved from above with the face surface member 5 provided with the thin portion at the open end 9 of the head body 1. By applying pressure, the peripheral portion 6 is brought into contact with the support portion 7 and the built-up portion 10 is crushed to fix the head main body 1 and the face surface member 5.

[0038]

The golf club head according to the present invention is a golf club head in which a head body having an opening and a face member are formed separately, and the thickness of the face member is adjusted. A golf club head capable of improving the resilience of the face surface, and forming a thin portion, and fitting and fixing the adjusted face surface member to the head main body. And a technique for manufacturing a golf club head with a good product yield.

[Brief description of the drawings]

FIG. 1 is a rear view of a golf club head according to the present invention.

FIG. 2 is a sectional view taken along line XX in FIG.

FIG. 3 is a view showing an embodiment of a face member according to the present invention.

FIG. 4 is a schematic view illustrating a method of manufacturing a golf club head according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Head main body 2 Hosel part 3 Neck part 4 Opening part 5 Face surface member 6 Peripheral part 7 Support part 8 Thin part 9 Opening end part 10 Overlay part 11 Lower metallic mold 12 Upper metallic mold

Claims (12)

[Claims] 1. A golf club head having a face member formed separately from a head body and a peripheral edge of the face member fixedly pressed into an opening of the head body. A golf club head, wherein a thin portion having a thickness smaller than that of the peripheral portion is provided in a part thereof. 2. When the face member is fitted and fixed to an opening of the head main body, the entire back surface of the face member exposed from the opening is formed as a thin portion having a smaller thickness than the peripheral portion. The golf club head according to claim 1, wherein: 3. An upper half of the back surface side of the face member exposed from the opening when the face member is fitted and fixed to the opening of the head main body, and is formed as a thin portion having a smaller thickness than the peripheral portion. The golf club head according to claim 1, wherein: 4. When the face member is fitted and fixed to an opening of the head main body, a lower half of the back surface side of the face member exposed from the opening is a thin portion having a smaller thickness than the peripheral portion. The golf club head according to claim 1, wherein: 5. When the face member is fitted and fixed to an opening of the head main body, an area from the toe side on the back surface side of the face member exposed from the opening is thinner than the peripheral edge. 2. The method as claimed in claim 1, wherein:
A golf club head according to claim 1. 6. When the face member is fitted and fixed to an opening of the head main body, an area from the heel side on the back surface side of the face member exposed from the opening is thinner than the peripheral edge. The golf club head according to claim 1, wherein the head is a part. 7. When the face member is fitted and fixed to an opening of the head body, a portion near the center on the back surface side of the face member exposed from the opening is formed as a thin portion having a smaller thickness than the peripheral portion. The golf club head according to claim 1, wherein: 8. When the face member is fitted and fixed to the opening of the head body, the vicinity of the peripheral portion on the back side of the face member exposed from the opening is formed as a thin portion having a smaller thickness than the peripheral portion. The golf club head according to claim 1, wherein: 9. The face member is made of pure titanium, titanium alloy, SUS630 steel, maraging steel, aluminum alloy, nickel alloy, magnesium alloy, copper alloy,
9. The golf club head according to claim 1, wherein the golf club head is made of a metal material selected from a beryllium alloy and an amorphous alloy. 10. The thickness of the peripheral portion of the face member is 2.0 to 3.0 mm, and the thickness of the thin portion is 50 to 90% of the thickness of the peripheral portion. 10. The golf club head according to any one of 1 to 9. 11. A face member is formed separately from a head body, and a thin portion having a thickness smaller than a peripheral portion is formed on at least a part of a back surface of the face member in advance by forging. A method of manufacturing a golf club head, comprising: fitting a peripheral portion of the face member to a portion; 12. A head surface member is formed separately from a head body, and a thin portion having a thickness smaller than a peripheral portion is formed on at least a part of a back surface of the face surface member by NC cutting in advance. A method of manufacturing a golf club head, wherein a peripheral edge of the face member is fitted into an opening and fixed by forging.