JP3258947B2 - Golf club head and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a golf club head having a metallic glass face and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, in order to produce metallic glass, a metallic material is melted, rapidly solidified from a liquid state to obtain a quenched metal (alloy) powder, and the obtained quenched metal powder is cooled to a predetermined temperature below a crystallization temperature. Various methods have been proposed, such as a method of solidifying into a shape to obtain a true density, and a method of rapidly solidifying a molten metal or alloy to directly obtain a metallic glass having a predetermined shape.

[0003]

However, most of the metallic glasses obtained by these conventional methods have a small mass, and it is difficult to obtain a bulk material that can be used for the face of a golf club head. there were. Therefore, a method of obtaining a bulk metallic glass by solidifying the quenched powder has been attempted, but a bulk material having sufficient properties such as high strength and high toughness required for the face of a golf club could not be obtained.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a golf club head having a face body having excellent strength characteristics, and a manufacturing method for easily manufacturing the golf club head. .

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, a golf club head according to the present invention is provided with a golf club head in which a face body is fitted and fixed to a face body fitting recess of a head body. In this case, the face body is composed of a mixture of a metallic glass phase and a crystal phase, and the face body is partially or wholly attached to the outer peripheral edge of the face body corresponding to the inner peripheral surface of the recess. The above-mentioned crystal phase is arranged around the circumference.

In a golf club head having a face body fitted and fixed in a face body fitting recess of a head body, the face body is composed of a mixture of a metallic glass phase and a crystal phase. The face body is provided on the outer peripheral edge of the face body corresponding to the inner peripheral surface of the recess, the crystal phase is partially or entirely disposed, and further, the outer peripheral edge of the face body At a position corresponding to the crystal phase of
The face body and / or the head body and / or another caulking member are plastically deformed to fix the face body to the head body.

[0007] A method of manufacturing a golf club head according to the present invention is a method of manufacturing a golf club head having a face body on the face side of a head body. At a predetermined position on the mold, a metal material is placed, and most or all of the metal material is melted using a high-energy heat source capable of melting the metal material, and the molten metal having a melting point equal to or higher than the obtained melting point is melted. Pressing with an upper mold and a lower mold to deform into a predetermined shape, and simultaneously or after this deformation, the majority or entire part of the molten metal is cooled at a critical cooling rate or higher, and metal is applied to the main part of the face body. At the same time as forming the glass phase, a crystal phase is formed over a part or entire circumference in a range corresponding to the outer peripheral edge of the face body, and thereafter, a composite of the metallic glass phase and the crystal phase is formed. Above face Is fitted into the recess for fitting the face body of the head body, and the face body and / or the head body and / or another caulking member are plastically formed at a position corresponding to the crystal phase on the outer peripheral edge of the face body. The face body is fixed to the head body by deformation.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments.

FIG. 1 shows a manufacturing apparatus F for manufacturing a face member of a golf club head according to the present invention.
The face body manufactured by the above is composed of a mixture of a metallic glass phase and a crystal phase, and is used for a wood type golf club head, an iron type golf club head, and the like, which will be described later. And the golf club head of the present invention is:
It is characterized by being manufactured by the method for manufacturing a face body described below.

First, the manufacturing apparatus F will be described. As shown in FIG. 1, the manufacturing apparatus F is installed in a press die 6 composed of an upper mold 4 and a lower mold 5 and a cavity 7 of the lower mold 5. An arc electrode (tungsten electrode) 8 for arc melting a metal material, and a cooling water supply device 9 for circulating cold water to the upper mold 4 and lower mold 5 of the press die 6 and the arc electrode 8.
And a vacuum chamber 10 for accommodating the press die 6 and the arc electrode 8, a lower die moving mechanism 11 driven by a motor 13 and moving the lower die 5 in a horizontal direction, and driven by a motor 14. And an upper die moving mechanism 12 for moving the upper die 4 in the vertical direction.

The lower die moving mechanism 11 is not particularly limited, and a conventionally known translation mechanism or reciprocating mechanism can be used. For example, a drive screw using a ball screw and a traveling nut or an air cylinder can be used. A hydraulic mechanism such as a pneumatic mechanism or a hydraulic cylinder can be suitably used. Also, the upper die moving mechanism 12 is not particularly limited, and may be any conventionally known press die mechanism, such as a hydraulic mechanism or a pneumatic mechanism. Further, other cooling medium (for example, refrigerant gas) may be used other than the cooling water.

The arc electrode 8 is connected to an arc power source 15 and is arranged at a slight inclination with respect to the depth of the cavity 7 of the lower mold 5. It is configured to be adjustable in the axial direction. Further, the position of the metal material is measured by the semiconductor laser sensor 17 in order to keep the distance (Z-axis direction) between the metal material on the lower die 5 and the arc electrode 8 constant. The movement may be automatically controlled. This is because if the gap between the arc electrode 8 and the metal material is not constant, the arc becomes unstable and the melting temperature varies. Further, a cooling gas (for example, Ar gas) injection port may be provided in the vicinity of the arc generating portion of the arc electrode 8, and a cooling gas may be injected from a gas supply source (gas cylinder) 18 to promote rapid cooling after heating. .

The vacuum chamber 10 has a water cooling jacket structure made of SUS, and an oil diffusion vacuum pump (diffusion pump) 19 and an oil rotary vacuum pump (rotary pump) 20 are connected by a vacuum exhaust port to evacuate. The gas supply source (gas cylinder) 21 is connected by an argon gas inlet so that replacement with an inert gas is possible. Further, the cooling water supply device 9 cools the circulation return cooling water with the coolant, and then supplies the cooling water to the upper mold 4, the lower mold 5, and the arc electrode 8 again as cooling water.

As shown in FIG. 2, the press die 6 has a shape having no fitting portion. More specifically, the upper mold 4 has a smooth concave curved surface 23, and a part of the concave curved surface 23 is a parting surface 22.

The lower die 5 has a convex parting surface 24 overlapping the parting surface 22 of the upper die 4,
It has a planar cavity 7. Further, a groove-shaped void portion 25 is provided in a portion along the parting surface 24 of the lower mold 5 and the mold is in a closed state (see FIG. 2C).
In this embodiment, a gap portion 41 is provided for allowing the groove-shaped gap portion 25 to communicate with the cavity portion 7. Excess molten metal during molding passes through the gap 41 and is absorbed in the gap 25.

The method of manufacturing the metallic glass face will now be described. First, as shown in FIGS. 1 and 2A, the lower mold 5 is placed at a predetermined position of the cavity 7 (on the side wall of the cavity 7). The metal material 26 is placed (in a ring along). In addition, as this metal material 26, Ln-Al-TM, Mg
Ternary alloys such as Ln-TM, Zr-Al-TM, Zr
-Al-Ni-Cu, Zr-Ti-Al-Ni-Cu,
The present invention can be applied to alloys composed of almost any combination of elements including Zr-based alloys such as Zr-Nb-Al-Ni-Cu and the like, and quaternary or higher alloys. Arc power supply 15)
It is preferable to use the alloy in the form of powder or pellets so that rapid melting by the alloy is easier, but if the rapid melting is possible, use a metal material in a shape such as a wire, band, rod, or lump. You may.

On the other hand, the position of the arc electrode 8 in the X-axis, Y-axis and Z-axis directions is adjusted by a laser sensor 17 and a stepping motor 16 via an adapter 8a, and a metal material is formed.
26 (in the Z-axis direction) is set to a predetermined value.
In this case, a plurality of arc electrodes 8 are provided at positions corresponding to the metal material 26 provided in a ring shape, so that the metal material 26 can be quickly melted as a whole.

Using the oil diffusion vacuum pump 19 and the oil rotary vacuum pump 20, the inside of the chamber 10 is set to a high vacuum, for example, 5 ×.
After setting the pressure to 10 ⁻⁴ Pa (using a liquid nitrogen trap), an Ar gas is supplied from an Ar gas supply source 21 so that
Replace with gas. The upper mold 4, the lower mold 5, and the arc electrode 8 are cooled by cooling water supplied from a cooling water supply device 9.

After the above preparations are completed, FIGS. 1 and 2
As shown in (b), the lower die moving mechanism 11 is driven by the motor 13 to move the lower die 5 in the horizontal direction (the direction of the arrow A) and stop at a position below the arc electrodes 8. Then, the arc power supply 15 is turned on to generate a plasma arc 27 between the tip of each of the arc electrodes 8 and the metal material 26, and the metal material
26 is completely dissolved to form molten metal 28. At this time, the molten metal 28 rises in a ring along the side wall of the cavity 7.

Thereafter, as shown in FIGS. 1 and 2 (b) and (c), the arc power supply 15 is turned off to extinguish the plasma arcs 27. Then, the lower die 5 was promptly moved to a position below the upper die 4 (in the direction of arrow B), and the upper die 4 was lowered (in the direction of arrow C) by the motor 14 and the upper die moving mechanism 12 to obtain the lower die 5. The molten metal 28 having a melting point or more is pressed (press-molded) by the upper mold 4 and the lower mold 5 to be deformed into a predetermined shape, and cooled and solidified to produce the face body 1 having a predetermined shape. At this time, the number of the face bodies 1 manufactured at a time may be a plurality other than one, or may be a plurality of continuous shapes.

At this time, the bottom and side surfaces of the metal material 26 that is in contact with the cavity 7 are not completely melted by the heat taken by the lower mold 5 and are in contact with the cavity 7 ( The bottom side and the side) do not form a metallic glass phase even after press molding (deformation), and remain as a crystal phase K.
The portion of the molten metal 28 raised on the other completely melted cavity 7 is cooled at or above the critical cooling rate to become the metallic glass phase G at the same time or after the deformation by press molding.

In other words, most or all of the metal material 26 on the cavity 7 of the lower die 5 is melted, and the molten metal 28 having a melting point or higher is deformed by the press die 6 and simultaneously deformed. After deformation, most or all of the molten metal 28 is cooled at a critical cooling rate or higher to form a metallic glass phase G on the main part of the face body 1 and at the same time, a range corresponding to the outer peripheral edge of the face body 1. In addition, a crystal phase K is formed over the entire circumference. Thereby, the face body 1 in which the metallic glass phase G and the crystal phase K are mixed is formed. When the metal material 26 is melted, it is preferable to cool the lower mold 5 to 50 ° C. or less by a water cooling device or the like in order to sufficiently remove heat from a part of the metal material 26.

FIG. 3 (a) shows the face body 1 (semi-finished product) in a state where the face body 1 has been cut out from the press die 6, and the molten metal is cooled and solidified on the outer peripheral edge 43 thereof. Since the burr portion 29 is formed, the product is finished by performing cutting, cutting or the like for removing the burr portion 29 as shown in FIG.

The finalized face body 1 that has been commercialized
Has a smooth convex surface, and the convex surface is a face surface 1a.
It has been. Then, as shown in FIG. 3B and FIG.
This face body 1 (for a wood type golf club head)
Is provided with the crystal phase K over the entire periphery of the outer peripheral edge portion (the portion between the outer peripheral edge 43 and the imaginary line), and the metallic glass phase G Is arranged. At this time, the volume of the crystal phase K is less than 50% of the volume of the face body 1 and the width dimension W (the dimension from the outer peripheral edge 43 to the virtual line) of the crystal phase K is set to 0.5 mm to 5 mm. ing. By satisfying these conditions, the face body 1 is excellent in strength characteristics, and easily fits the golf club head (described later) to the head body by caulking.

FIGS. 5 and 6 show a hollow wood-type (metal head) golf club head 2 (first embodiment) manufactured using the finalized face body 1 that has been commercialized. ing. More specifically, the club head 2 is made of titanium, a titanium alloy, stainless steel, or the like, and has a face body fitting recess 31 on the face surface 1a side.
And a face body 1 having an outer peripheral edge corresponding to the inner peripheral surface 31a of the fitting recess 31, wherein 32 is a sole, 33 is a side part, and 34 Is a crown portion, and 35 is a neck portion.

Here, the face body 1 is connected to the head body 30 (30
The method of fitting in a) will be described. In this method, as shown in FIGS. 5 and 6 (a), first, the face body 1 is fitted into the fitting recess 31 of the head body 30 and the crystal phase K at the outer peripheral edge of the face body 1 is fitted. The face body 1 is plastically deformed at a corresponding position and is fixed to the head body 30.

That is, the crystal phase K utilizes the property of being plastically deformable. In this case, for example, the face body 1
A ridge 42 made of a crystal phase K is provided along the outer peripheral edge 43 on the side of the face surface 1a on the entire periphery (during press molding), and a recess 44 for absorbing the plastically deformed crystal phase K is provided in the head body. 30 are provided along the entire periphery along the corners of the recesses 31.
In addition, the protrusion 42 may be partially provided along the outer peripheral edge 43, and the recess 44 may be partially provided at a position corresponding to the protrusion 42.

Then, the ridge 42 is pressed (in the direction of the arrow) using a press molding machine or the like so that the face 1a becomes smooth, so that the crystal phase K becomes plastic as shown in FIG. The crystal phase K is deformed and enters into the concave portion 44. Therefore, the face body 1 can be fixed to the head main body 30 without damaging the metallic body phase G. Also, when pressed by a press molding machine or the like, the outer peripheral edge 43 of the face body 1 is pressed.
Are positioned in contact with the inner peripheral surface 31a of the recess 31,
The face body 1 does not shift. In addition, the face surface 1a
Finishing processing such as grinding is performed from the side to remove extra protruding portions and the like (as in the example in the figure) to obtain a finished product.

With the face body 1 thus obtained, the golf club head of the present invention can stably maintain reproducibility even when the golf ball hits the face. As a result, the flight distance, directionality, Excellent properties such as impact properties, strength, and toughness can be exhibited. Further, by intentionally disposing the crystal phase K, which is relatively easily plastically deformed, on the outer peripheral edge of the face body 1, the face body 1 is plastically deformed and easily crimped into the head body 30 (joining). )
can do. The setting conditions of the crystal phase K in the face body 1 described with reference to FIGS. 3 and 4, ie, the volume of the crystal phase K is less than 50% of the whole, and the width dimension W is 0.5 mm.
55 mm─── is optimal both in function and production as a golf club head.

Next, FIG. 7 shows a case where the face body 1 is fixed by plastically deforming the head body 30 (30a) (second embodiment). More specifically, as shown in FIG. 1A, for example, a chamfered portion 45 is provided on the entire periphery (or partially) along the outer peripheral edge 43 on the face surface 1a side of the face body 1, and Recess 31 in head body 30 (30a)
A ridge 46 is provided on the entire circumference (or partly) along the opening edge on the side of the face surface 1a.

The position corresponding to the crystal phase K, ie,
The ridge 46 of the head main body 30 is pressed (in the direction of the arrow) by a press molding machine or the like to cause plastic deformation. Then, as shown in FIG. 2B, the inner peripheral surface 31a of the recess 31 and the chamfered portion of the face body 1 are formed.
The gap between the head body 30 and the head body 30
To be fixed. At this time, the crystal phase K may be plastically deformed (bitten) by the lateral pressure of the opening edge of the head body 30 that has been plastically deformed, but the metallic glass phase G is not deformed, and the face body 1 (the face body 1) is not deformed. Function) is not impaired.

FIGS. 8 to 10 show a case where the face body 1 is fixed to the head main body 30 (30a) using a caulking member 47 (third embodiment). More specifically, in the recess 31 of the head main body 30 (30a), a step portion 48 is formed along the peripheral edge over the entire circumference, and the step portion 48 is formed.
It has a gap forming surface portion 49 that is inclined outwardly of 48.

Then, the face body 1 is fitted into the recess 31 of the head body 30, and a gap S between the inner peripheral surface 31 a of the recess 31 and the outer peripheral edge 43 of the face body 1 is formed into a ring-shaped and cross-sectional rectangular shape. When the caulking member 47 is press-fit plastically deformed, as shown in FIG. 10 (b), between the caulking member 47 and the chamfered portion 45 of the face body 1 and between the caulking member 47 and the gap forming surface portion 49 of the head body 30. Is embedded, and the head body 30 and the face body 1 are connected and fixed to each other. In this case also, the plastically deformed caulking member 47 may bite into the crystal phase K, but the metal glass phase G of the face body 1 is not damaged by the plastic deformation of the crystal phase K.

FIG. 9 is a cross-sectional view of the golf club head 2. Reference numeral 50 denotes a hollow chamber of the head main body 30 (30a), and reference numeral 51 denotes a window communicating with the hollow chamber 50. An inner flange 52 is provided on the inner peripheral surface of the window 51 so as to project therefrom.
The shallow recess 31 is formed with the bottom as a bottom. In addition,
The window body 51 may be omitted to form the head body 30 in a state where the face wall is completely closed, and the recess 31 may be formed in a shallow dish shape.

FIGS. 11 to 13 show a case where the caulking member 47 and the head body 30 (30a) are plastically deformed to fix the face body 1 to the head body 30 (30a) (fourth embodiment). ing. More specifically, the recess of the head body 30
A concave groove 54 is formed along the inner peripheral surface 31a of the groove 31 via a side wall 53 having a small thickness T, and an inclined gap forming surface portion 49 is formed on the side surface of the concave groove 54 opposite to the face body 1. Is provided. Then, the caulking member 47 is press-fitted and plastically deformed into the concave groove 54, and the side wall 53 is deformed toward the chamfered portion 45 side of the outer peripheral edge 43 (made of the crystal phase K) of the face body 1, and The face body 1 is connected and fixed.

There are many possible methods for fitting the face body 1 and the head body 30 in addition to those described with reference to FIGS. In addition, these fitting methods are not limited to the wood type golf club head, and can be applied to an iron type golf club head described later. In the description of the iron-type golf club head, the same reference numerals are the same as those in the case of the wood-type golf club head, and the description thereof will be partially omitted.

FIG. 14 shows an iron-type golf club head face body 1 composed of a mixture of a metallic glass phase G and a crystal phase K. The crystal phase K is disposed over the entire periphery of the outer peripheral edge of the face body 1 (as described above).

FIGS. 15 and 16 show an iron type golf club 3 (fifth embodiment) manufactured using the face body 1. FIG. The club head 3 has a head body 30 (30) made of titanium, a titanium alloy, stainless steel, or the like.
b) and an outer peripheral edge 43 that is fitted and fixed to the face body fitting recess 31 provided on the face surface 1a side of the head body 30 (30b) and that corresponds to the inner peripheral surface 31a of the recess 31. 38, a sole, and a neck 40.

The head body 30 is formed with a cavity 58 communicating (penetrating) with the face surface and the back surface, and an inner flange portion 55 is formed on the inner peripheral surface of the cavity 58 so as to project therefrom. Yes,
The recess 31 for fitting the face body 1 is formed with the inner flange 55 as a bottom surface. It is also possible to form the recess 31 in a shallow dish shape with a completely closed bottom (see FIG.
17). In this case, the head body 30 and the face body 1 are fitted at the corners of the recess 31 by plastically deforming the crystal phase K of the face body 1 (as described in FIG. 6). It is pressed into the recess 57.

FIG. 17 (as described in FIG. 7)
A state in which the head body 30 (30b) is plastically deformed and the face body 1 fitted in the recess 31 is fixed (sixth embodiment) is shown. The head body 30 is a shallow dish having a bottom surface 56 in which the recess 31 is completely closed, and has a back face 39.

FIGS. 18 and 19 show a seventh embodiment.
In the iron type golf club head 3, the face body 1 is fitted into the recess 31 of the head body 30 (30b) (as described in FIG. 10), and is formed by the step portion 48 provided in the recess 31. An annular caulking member 47 is press-fitted and plastically deformed in a gap between the face body 1 and the head body 30 (30b).

FIGS. 20 and 21 show an eighth embodiment.
The head body 30 (as described in FIG. 13)
An annular caulking member is provided in the annular groove 54 provided in (30b).
47 is press-fit plastically deformed, and the thin side wall 53 between the concave portion 31 and the concave groove 54 is plastically deformed toward the face body 1 to fit the face body 1 to the head body 30 (30b). .

In the golf club head of the present invention, as shown in FIG. 22, of the metallic glass phase G and the crystal phase K constituting the face 1, the crystal phase K is changed to the face 1
May be partially disposed at the outer peripheral edge portion of the main body. In this case, at the time of manufacturing the face body 1 (see FIG. 2), the metal material 26 is partially placed at a predetermined position along the side wall of the cavity 7 of the lower mold 5. Then, the metal material 26 is melted, and the obtained molten metal 28 is press-formed to form the face body 1.
Then, as shown in FIG. 22, the face body 1 in which the crystal phases K, K are arranged at predetermined positions on the outer peripheral edge is obtained. In the case of the example shown in the figure, a face body 1 for a wood-type golf club head is provided with crystal phases K, K on the upper side and the lower side of the outer peripheral edge.

The face body 1 is connected to the head body 30.
As a method of fitting to (30a), as shown in FIG.
For example, grooves 54, 54 are formed in the head main body 30 (30a) at positions corresponding to the crystal phases K, K of the face body 1, and the caulking members 47, 47 are press-fitted and plastically deformed in the grooves 54, 54.
The face body 1 fitted in the recess 31 is fixed to the head body 30.

As shown in FIGS. 24 and 25, the crystal phases K may be intermittently (intermittently) arranged at the outer peripheral edge of the face body 1. In this case, each of the crystal phases K. May be formed in the head main body 30 (30a) at positions corresponding to the above, and the caulking members 47 may be press-fitted and plastically deformed in the respective concave grooves 54 to fix the face body 1 to the head main body 30.

Although not shown, in the case of an iron-type golf club head face also, a crystal phase may be partially disposed at the outer peripheral edge, and FIGS.
The face body may be fitted to the head body as described in 25.

The present invention is not limited to the above-described embodiment. For example, as shown in FIG. 3B, the present invention is not limited to disposing the crystal phase K on the outer peripheral edge of the face body 1. Further, a crystal phase K may be provided on the back side of the face body 1 (at this time, the volume of the crystal phase K is also reduced to 50% of the whole).
%).

The high-energy heat source for dissolving the metal material is not particularly limited. For example, typical examples include a high-frequency heat source, an arc heat source, a plasma heat source, an electron beam, a laser beam, and the like. These heat sources are supplied to the lower die 5 of the press die 6 by one.
The number may be one or more.

[0049]

Since the present invention is configured as described above, the following effects can be obtained.

According to the first aspect of the present invention, the metallic glass phase G is provided at the central portion of the face body 1 against which the golf ball collides and at the main portion around the central portion (excluding the outer peripheral edge portion). The golf club head has excellent strength characteristics such as high impact resistance and high toughness. Further, by disposing the crystal phase K on the outer peripheral edge of the face body 1, the outer peripheral edge can be plastically deformed and the face body 1 can be fixed to the head main body 30 by caulking.

According to the second aspect of the present invention, the metallic glass phase G is provided at the central portion of the face body 1 against which the golf ball collides and at the peripheral portion (excluding the outer peripheral edge portion). The golf club head has excellent strength characteristics such as high impact resistance and high toughness.

Even if the head main body 30 is made of a material that is difficult to plastically process, the outer peripheral edge of the face main body 1 is plastically deformed without deforming the metallic glass phase G.
The face body 1 can be easily fixed to the head body 30 by caulking. Further, it is possible to cope with all kinds of caulking fitting, such as plastic deformation of the head main body 30 side or use of a caulking member 47.

According to the third aspect of the present invention, a golf club head having excellent strength characteristics such as high impact resistance and high toughness can be obtained by the metallic glass phase G of the face body 1 and reproduced by a simple process. The face body 1 can be produced easily and at once.

When the face body 1 and the head body 30 are connected and fixed, when the head body 30 is made of a material such as a titanium alloy which is difficult to plastically work, the crystal phase K of the face body 1 is plastically deformed to improve the efficiency. The face body 1 can be fixed to the head body 30 well and stably. That is, the club head can be manufactured without deforming the metallic glass phase G and without impairing the function as the face body 1. Further, when the face body 1 is fixed by plastically deforming the head body 30 or when the face body 1 and the head body 30 are connected and fixed using the caulking member 47, the head body 30 or the caulking member 47 Even when the face body 1 is joined by the side pressure, the side pressure can be absorbed by the plastic deformation of the crystal phase K.
The golf club head can be manufactured while maintaining the function as the face body 1 without being deformed.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory view of a manufacturing apparatus for manufacturing a face body used in a golf club head of the present invention.

FIG. 2 is an explanatory view showing a manufacturing process of a face body by a manufacturing apparatus.

FIG. 3 is a sectional view showing a molded face body having a predetermined shape.

FIG. 4 is a front view of a face member for a wood type golf club head.

FIG. 5 is a front view showing a first embodiment of the golf club head of the present invention.

FIG. 6 is an enlarged sectional explanatory view of a main part.

FIG. 7 is an enlarged sectional explanatory view of a main part showing a second embodiment of the golf club head.

FIG. 8 is a front view showing a third embodiment of the golf club head.

FIG. 9 is a sectional side view.

FIG. 10 is an enlarged sectional explanatory view of a main part.

FIG. 11 is a front view showing a fourth embodiment of the golf club head.

FIG. 12 is a sectional side view.

FIG. 13 is an enlarged sectional explanatory view of a main part.

FIG. 14 is a front view showing a face body for an iron-type golf club head.

FIG. 15 is a front view showing a fifth embodiment of the golf club head.

FIG. 16 is a sectional side view.

FIG. 17 is a cross-sectional side view illustrating a sixth embodiment of the golf club head.

FIG. 18 is a front view showing a seventh embodiment of the golf club head.

FIG. 19 is a cross-sectional side view.

FIG. 20 is a front view showing an eighth embodiment of the golf club head.

FIG. 21 is a sectional side view.

FIG. 22 is a front view showing another face body for a wood type golf club head.

FIG. 23 is a front view showing a ninth embodiment of the golf club head.

FIG. 24 is a front view showing another face body for a wood type golf club head.

FIG. 25 is a front view showing a tenth embodiment of the golf club head.

[Explanation of symbols]

 Reference Signs List 1 face body 4 upper mold 5 lower mold 6 press mold 26 metal material 28 molten metal 30 head body 31 recess 31a inner peripheral surface 47 caulking member G metallic glass phase K crystal phase

Continued on the front page (72) Inventor Akio Onishi 460-2, Minamiro, Kamiso-cho, Kakogawa City, Hyogo Prefecture

Claims (3)

(57) [Claims] 1. In a golf club head in which the face body 1 is fitted and fixed to a face body fitting recess 31 of a head body 30, the face body 1 has a metallic glass phase G and a crystal phase K.
And the crystal phase K is partially or entirely disposed on the outer peripheral edge of the face body 1 corresponding to the inner peripheral surface 31a of the recess 31. A golf club head, which is provided. 2. In a golf club head in which the face body 1 is fitted and fixed in the face body fitting recess 31 of the head body 30, the face body 1 has a metallic glass phase G and a crystal phase K.
And the crystal phase K is partially or entirely disposed on the outer peripheral edge of the face body 1 corresponding to the inner peripheral surface 31a of the recess 31. The face body 1 and / or the head body 30 and / or another caulking member 47 are plastically deformed at a position corresponding to the crystal phase K on the outer peripheral edge of the face body 1. A golf club head comprising the face body 1 fixed to the head body 30. 3. A method of manufacturing a golf club head having a face body 1 on the face side of a head body 30, wherein a predetermined position of a press die 6 comprising an upper die 4 and a lower die 5 on the lower die 5 is provided. Then, a metal material 26 is provided, and a high-energy heat source capable of melting the metal material 26 is used to melt most or all of the metal material 26, and a molten metal 28 having a melting point equal to or higher than the obtained melting point is obtained.
Is pressed by the upper mold 4 and the lower mold 5 to be deformed into a predetermined shape. At the same time or after the deformation, most or all of the molten metal 28 is cooled at a critical cooling rate or more, and the face body is cooled. 1 at the same time as forming the metallic glass phase G in the main portion of the face body 1,
A crystal phase K is formed partially or over the entire circumference, and then the face body 1 formed by mixing the metallic glass phase G and the crystal phase K is inserted into the face body fitting recess 31 of the head body 30. The face body 1 and / or the head body 30 and / or another caulking member 47 are plastically deformed at a position corresponding to the crystal phase K on the outer peripheral edge of the face body 1, A method of manufacturing a golf club head, comprising fixing a face body (1) to a head body (30).