JP2691496B2 - Golf club head and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates to a golf club head and its was formed and the head body and the face body in different metals
The present invention relates to a method of manufacturing the same , and more particularly, to improvement of a joint structure between a face body and a head body.

[0002]

2. Description of the Related Art As a method for producing a metal club head called a metal head, there is an integral method in which the whole is integrally formed by casting, forging or the like, and a method in which a plurality of parts are formed separately and then these are integrated by welding. There is a dividing method to be used, the integrated method is mainly applied to iron club heads, and the dividing method is often applied to wood club heads.

In the above-mentioned integrated system, the entire head is generally made of the same metal material. Even in the divided system, each part is made of the same or the same kind of metal material from the viewpoint of reliability of welding strength. It is common to join and unite.

In recent years, attention has been paid to titanium, titanium alloys, etc., which are lightweight and have high mechanical strength, and metal heads using this kind of light metal are being used. However, since this kind of metal is expensive, the entire head is used. Is very expensive if made of this type of light metal. Also, light metals such as titanium and titanium alloys are suitable for the face body that occupies the face part of the head, but if a metal with a larger specific gravity than the face body is used for the head body that makes up the rest of the head, the center of gravity of the head will be Can increase the moment of inertia of
It becomes easier to adjust the height of the center of gravity of the head and the depth of the center of gravity from the face. Therefore, there is an increasing demand for metal heads constructed by combining different kinds of metal materials.

[0005]

However, when the face body and the head body are made of different metal materials, it becomes difficult to perform welding, and it is difficult to obtain sufficient welding strength. In addition, since the welded portion appears on the surface even after the finish polishing, the appearance is greatly deteriorated. On the other hand, if the face body is simply fitted into the recess or void of the head body by press fitting or the like, the face body may come off due to the impact during use.

It is therefore an object of the present invention, a golf club head and moreover excellent in aesthetic appearance easily and firmly bond between the face member and the head body made of different metals
It is to provide a manufacturing method thereof .

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 provides a golf club head in which a head body and a face body are made of different metals.
The face body has an opening formed on the face surface of the head body.
It is housed in the recess, and a recess is formed on the outer periphery of the face body.
Is accommodated in the recess of the head body at the inner periphery of the recess.
Engaging the concave portion of the face body and placing the face body in the concave portion.
The convex part to be fixed is formed by plastic deformation of a part of the head body.
It is characterized by being made .

According to a second aspect of the present invention, in the golf club head according to the first aspect, the recess is formed in the head body.
An opening that opens to the bottom surface and the back surface of the head body is
It is characterized by being formed .

According to a third aspect of the present invention, the head main body
Face having a concave portion on the outer periphery a recess formed in the over scan surface
After inserting the body, press the head body
Inside the recess by plastically deforming a part of the head body.
Forming a protrusion that engages a recess in the face body at
And a method for manufacturing a golf club head .

The invention according to claim 4 is the same as that according to claim 3.
In the manufacturing method of the Luff Club Head,
Preformed on the periphery of the recessed opening of the head body during press molding
Part of the head body so that the protruding part is crushed.
It is characterized by being plastically deformed .

According to a fifth aspect of the present invention, the head body has
Form a recess opening on the face surface and
A recess is formed on the inner side surface, and the outer peripheral portion of the recess of the head body is
Same as the inner circumference or slightly smaller than the inner circumference of the recess
Insert a small face body into the recess of the head body
After that, by press-molding the face body,
A part of the face body is plastically deformed to form the concave portion of the head body.
Golf club characterized by forming a convex portion that engages with the golf club
It is a method of manufacturing a love head .

According to the invention of claim 6, the invention of claim 5 is provided.
In the manufacturing method of the Ruff club head, the recess is
While forming on the inner surface near the bottom of the recess of the main body,
Outside the back surface of the face body near the recess on the bottom of the recess
Integral or separate protrusions that plastically deform the circumference outward
It is characterized in that it is provided and press molding of the face body is performed.
You .

According to a seventh aspect of the present invention, the head main body has
Form a recess opening on the face surface and
Form an opening that opens to the bottom surface and the back surface of the head body
The outer circumference is the same as the inner circumference of the recess of the head body.
Or if it is formed to be slightly smaller than the inner peripheral shape of the recess,
The opening is projected from the back surface that abuts the bottom surface of the recess.
A head body with a face body that has a protrusion that fits into the mouth
Insert into the recess of the body, and the protrusion of the face body and the head
Caulk the opening of the main body with the back surface side of the head main body.
Is a golf club head
You.

[0014]

In the golf club head according to the present invention, the face body housed in the void of the head body is formed by the plastic deformation of the concave portion formed on one of the joints between the face body and the head body. Since it is prevented from coming off by the engagement with the convex portion, the connection between the face body and the head main body is strong and the appearance is excellent.

In particular, the recess formed on the outer peripheral portion of the face body
The convex portion formed on the inner peripheral portion of the head body is engaged with the portion.
This convex portion is formed by plastic deformation of a part of the head body.
Therefore, elastic deformation of the face body and head body
Unlike the fitting form that uses the
Even if there are variations in the
The key can be easily absorbed, and the concave and convex parts can be reliably
It can be firmly engaged. Therefore, this recess
The face body inside the recess of the head body by engaging the
Can be securely fixed. Also, face
Plastic deformation beyond the limit of elastic deformation for the concave part of the body
Since they are engaged in a state, the concave portion has a wide degree of freedom in its shape.
It is possible to form an effective shape that has excellent connectivity with the protrusions.
it can. Therefore, the connection between the face body and the head body
The reliability of can be increased. Moreover, the recess is
Since it is formed on the outer periphery of the base body, its pre-processing is extremely
It is easy, and the head body has a recess on the inner circumference of the recess.
Pre-processing is easy because it does not need to be formed. Further
In addition, the convex portion that engages with the concave portion of the face body is
Since it is formed by plastic deformation of the
To prevent excessive internal stress from accumulating in the body.
You. Therefore, to the face body,
There is no risk of deformation such as bulges or dents. did
Providing a golf club head with consistent hitting performance
can do.

According to another aspect of the golf club head of the present invention, the moment of inertia around the center of gravity of the head is increased and
And low center of gravity are possible. In addition, even in the above configuration,
The protrusions that engage with each other and the protrusions
Since it is formed by elastic deformation, inside the recess of the head body
As part of the face body protrudes toward the inside opening
Deformation can be prevented. Therefore, the face
It prevents changes and variations in the mechanical properties of the body.
A golf club head with consistent hitting performance.
Can be offered .

Manufacture of a golf club head according to claim 3.
According to the method, the recess formed on the face surface of the head body
After inserting the face body that has a recess in the
By press-molding the head body,
The part of the face body that is plastically deformed and is recessed in the recess
Since a convex portion that engages with the head portion is formed, the face body and the head
Unlike press-fitting that uses elastic deformation with the main body,
Even if there is some variation in machining accuracy, the plastic deformation of the convex
Variations can be easily absorbed, and concave and convex
The part can be securely and firmly engaged. Accordingly
By engaging the concave portion and the convex portion with the face body.
It can be securely fixed and held in the recess of the main body. Ma
In addition, the convex portion exceeds the limit of elastic deformation with respect to the concave portion of the face body.
Since they engage with each other in the plastically deformed state, the recesses have their own shape.
With an effective shape that has a wide range of reasons and has excellent connectivity with convex parts
can do. Therefore, face body and head book
It is possible to increase the reliability of binding with the body. Moreover, it is concave
Since the part is formed on the outer periphery of the face body in advance,
It is very easy to work, and the head body is the inner circumference of the recess.
Since it is not necessary to form a recess in the
You. Furthermore, the convex portion that engages with the concave portion of the face body is the head.
It is formed by plastic deformation of a part of the main body
This prevents excessive internal stress from accumulating on the face body.
Can be stopped. Therefore, the face body then the face surface
There is no risk of deformation such as bulges or dents to the side.
Manufacture and provide golf club heads with consistent ball hitting performance.
Can be offered.

A golf club head manufacturing method according to claim 4.
According to the method, the press pressure is preformed on the head body
Part of the head body
The face body can be effectively plastically deformed.
The convex portion that engages with the concave portion can be easily formed.
Therefore, it is possible to efficiently use a small manufacturing facility and power.
Fukulab heads can be manufactured.

Production of a golf club head according to claim 5.
According to the method, the face body is pressed into the recess of the head body.
Since there is no need to
The opening of the recess may be deformed unexpectedly or the face body
Can be prevented from being pushed into the recess in an unexpected posture.
You. Therefore, it is possible to prevent the occurrence of poor fitting of the face body.
Wear.

A method for manufacturing a golf club head according to claim 6.
According to the method, press pressure is applied to the bottom surface of the recess of the head body.
Head head
Since it is possible to effectively plastically deform a part of the body,
Easily forming a convex portion that engages with a concave portion of the face body
Can be. Therefore, a small manufacturing facility and power are effective.
The golf club head can be manufactured efficiently.

According to the golf club head of claim 7 ,
The head body opening and the head body opening.
Since the back side of the main body is caulked and joined,
The effect of local rough deformation due to
It is possible to prevent the head body from reaching the face surface side. I
Therefore, we propose a golf club head with consistent hitting performance.
Can be offered. Moreover, the face body is the head body
Since there is no need to press fit into the recess of the
The opening of the recess of the head body was deformed to an unexpected shape
The face body is pushed into the recess in an unexpected posture
Can be prevented. Therefore, poor fitting of the face body
Can be prevented.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the drawings. In addition, in order to avoid redundant description, the same or similar components are denoted by the same reference numerals in these drawings.

1 to 5 show a first embodiment in which the present invention is applied to the head of an iron golf club. Referring to these figures, the club head 1
0 is a face body 11 occupying a part of the face surface,
The head main body 12 forming the remaining portion of the club head 10 is formed of a different metal, and the head main body 12 is integrally formed with a neck portion 13.

The head body 12 is formed with a cavity 14 which opens to the face surface and the back surface thereof. The void 14 is a bottomed recess 14 that opens to the face surface of the head body 12.
a and an opening 14b that opens to the bottom of the recess 14a and the back surface of the head body 12. The face body 11 is housed in the recess 14a of the head body 12,
The back surface of the face body 11 is in contact with the bottom surface of the recess 14a. Therefore, the face body 11 does not slip out behind the head body 12. But even face body 1
1 is pressed into the recess 14a, or the face body 1
Even if the head body 12 and the head body 12 are adhered to each other, the face body 11 is not sufficiently prevented from coming off in front of the head body 12.

Therefore, in this embodiment, the face body 11
A concave portion 15 is formed on one of the joints between the head body 12 and the head body 12, and a convex portion 16 that engages with the concave portion 15 is formed on the other side by plastic deformation, and serves to prevent the face body 11 from coming off. More specifically, as shown in FIG. 5, the concave portion 15 is a chamfer formed on the outer peripheral edge of the face body 11 on the face side, and the convex portion 16 that engages with the concave portion 15 is the concave portion 14 a of the head body 12 in advance. The protrusion 17 (see FIG. 11A) formed on the face surface of the head body 12 along the outer peripheral edge of the opening is crushed by press molding (see FIG. 11B). .

In this embodiment, the face body 11 is made of a light metal such as aluminum alloy, titanium, titanium alloy,
The head body 12 is made of a metal material having a larger specific gravity than the face body 11, such as stainless steel or beryllium copper,
The face body 11 is made of, for example, casting, forging, a spread material or the like, and the head body 12 is made of, for example, casting, forging or the like. The face body 11 may have a constant thickness, but in this embodiment, the thickness of the face body 11 increases from the top side toward the sole side.
When the face body 11 having such a structure is used, the mass of the head body 12 having a larger specific gravity than the face body 11 on the sole side can be deviated to the back side, thereby increasing the depth of the center of gravity from the face of the head. Can be made. Further, a part of the back surface of the face body 11 has an opening 14b.
Since it is exposed to the back surface side of the head body 12,
The exposed portion on the back surface of the face body 11 can be used as a display unit by previously forming characters, symbols, designs, etc. by engraving.

In the club head having the above structure, the face body 11 housed in the recess 14a of the head body 12 has the concave portion 15 formed in the face body 11 and the convex portion 16 formed by plastic deformation of the head body 12. The engagement between the face body 11 and the head main body 12 is strong because the front body 11 and the head body 12 are prevented from coming off. In addition, since no welding is required, the appearance is excellent.

Further, in this embodiment, since the convex portion 16 formed by plastic deformation is formed on the head main body 12, the head main body 1
When 2 is softer than the face body 11, the concave-convex engaging portion can be easily formed.

Although the concave portion 15 and the convex portion 16 can be formed over the entire circumference of the face body 11 and the entire circumference of the recess 14a, respectively, a part of the outer circumference of the face body 11 and the peripheral edge of the opening of the recess 14a can be formed. You may form in one part. Further, in this embodiment, the cavity 14 has the opening 14b that opens into the recess 14a, but the opening 14b may be omitted and only the recess 14a may be formed.

FIG. 6 shows a second embodiment of the present invention. In this embodiment, as shown in FIG. 1A, a concave portion 15 in the form of an annular groove is formed on the outer peripheral surface of the face body 11, and the concave portion 1 is previously formed on the face surface of the head body 12.
A protrusion 17 is formed in an annular shape along the outer circumference of the opening of 4a. Then, as shown in FIG.
The face 16 side of 2 is press-molded and the protrusion 17 is crushed to form the protrusion 16 that engages with the recess 15.

7 to 10 show the third to third cases in which the convex portion 16 is formed by the plastic deformation of the face body 11, respectively.
A sixth embodiment is shown.

In the third embodiment shown in FIG. 7, as shown in FIG. 7A, the recess 15 is formed on the inner side surface of the head body 12 in the vicinity of the bottom surface of the recess 14a. The protruding portion 18 is formed in advance near the outer periphery of the back surface. Then, as shown in FIG. 2B, the face body 11 is press-molded in the recess 14a, so that the convex portion 16 that engages with the concave portion 15 is formed on the outer peripheral portion of the face body 11 near the back surface. There is.

In this embodiment, the concavo-convex engaging portion can be easily formed when the face body 11 is made of a metal material softer than the head body 12. Further, since the protrusion 18 formed in advance near the outer periphery of the back surface of the face body 11 is crushed to form the protrusion 16, the protrusion 16 can be easily formed.

In the fourth embodiment shown in FIG. 8, the recess 1
5 is formed on the inner side surface near the bottom surface of the recess 14a of the head body 12, and the bottom surface of the recess 14a near the recess 15 has a projection 19 for plastically deforming the outer peripheral surface of the back surface of the face body 11 outward. Are provided integrally. Further, in the fifth embodiment shown in FIG. 9, a protrusion 19 in the form of a ring that plastically deforms the outer peripheral portion of the back surface of the face body 11 outward is provided on the bottom surface of the recess 14a near the recess 15. It is provided separately from.

In these examples, the face body 1
1 is press-molded in the recess 14a, the face body 1
The outer peripheral portion of the back surface of 1 can be easily plastically deformed outward by the protrusion 19, and the protrusion 16 that engages with the recess 15 can be easily formed.

In the sixth embodiment shown in FIG. 10, the cavity 14 of the head body 12 has an opening 14b which opens to the bottom surface of the recess 14a and the back surface of the head body 12, and the face body 11 is concave. It has a protrusion 20 that protrudes from the rear surface that abuts the bottom surface of the place 14a and that fits into the opening 14b. A recess 15 is formed in the periphery of the opening 14b on the back surface side of the head body 12 (see FIG. 10A), and the recess 15 is formed by press molding the protrusion 20 of the face body 11.
A convex portion 16 that engages with the face is formed.
The protrusion 20 of the body 11 and the opening 14b of the head body 12;
Are caulked and coupled on the back surface side of the head body 12 (see FIG. 2B).

In this embodiment, since the concave and convex engaging portions of the concave portion 15 and the convex portion 16 are formed on the back surface side of the head main body 12, the convex portion 16 is different from the case where the concave and convex engaging portions are formed on the face surface side. It is possible to minimize the influence of the plastic deformation of the on the face surface. Therefore, it is possible to easily obtain a club head with stable finishing accuracy and characteristics.

Although the embodiments shown in the drawings have been described above, the present invention is not limited to the embodiments described above,
Various modifications can be made to the components within the scope of the invention described in the claims. For example, the face body may occupy almost the entire face surface of the head, or may be located from the face surface to a part of the sole surface or the top surface. It goes without saying that the present invention can be applied not only to the head for iron clubs but also to the head for wood clubs.

[0039]

As is apparent from the above description, according to the present invention, the face body is housed in the void formed in the face surface of the head body, and the joint portion between the face body and the head body is formed. Since the concave portion is formed on one side and the convex portion that engages with the concave portion is formed by plastic deformation to prevent the face body from coming off, the face body made of a different metal and the head body are firmly coupled and aesthetically pleasing. Excellent golf club head
And the manufacturing method thereof can be provided.

[Brief description of the drawings]

FIG. 1 is a front view of an iron club head showing a first embodiment of the present invention.

[0041]

FIG. 2 is a rear view of the main part of the head shown in FIG.

FIG. 3 is a plan view of the head shown in FIG.

4 is a cross-sectional view of the head shown in FIG. 1 taken along line 4-4 in FIG.

5A and 5B are enlarged cross-sectional views of a main part showing a manufacturing process of the club head shown in FIG.

6 (a) and 6 (b) are enlarged cross-sectional views of a main part showing a structure of a club head according to a second embodiment of the present invention and a manufacturing process thereof.

7 (a) and 7 (b) are enlarged cross-sectional views of a main part showing a structure of a club head according to a third embodiment of the present invention and a manufacturing process thereof.

8A and 8B are enlarged cross-sectional views of a main part showing the structure of a club head according to a fourth embodiment of the present invention and the manufacturing process thereof.

9 (a) and 9 (b) are enlarged cross-sectional views of a main part showing a structure of a club head according to a fifth embodiment of the present invention and a manufacturing process thereof.

10 (a) and 10 (b) are sectional views showing the structure of a club head according to the sixth embodiment of the present invention and the main manufacturing steps thereof.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 club head 11 face body 12 head body 14 void 14a recess 14b opening 15 recess 16 convex 17 projecting 18 projecting 19 projecting 20 projecting

Claims (7)

(57) [Claims] 1. A golf club head comprising a head body and a face body made of different metals, wherein the face body is
It is housed in a recess formed in the face of the head body.
As a result, a concave portion is formed on the outer peripheral portion of the face body.
The inner periphery of the recess of the face body housed in the recess
The convex portion that engages with the concave portion and fixes the face body in the concave portion
It is formed by plastic deformation of a part of the head body.
And a golf club head. 2. The head body has a bottom surface of the recess and
An opening is formed on the back surface of the head body.
The golf club head according to claim 1, wherein
De . 3. A recess formed in the face surface of the head body.
After inserting the face body that has a recess in the
Of the head body by press-molding the head body
The part of the face body that is plastically deformed and is recessed in the recess
Golf club characterized by forming a convex portion that engages with the golf club
Love head manufacturing method . 4. A head body for press molding of a head body.
Push the pre-formed protrusion around the opening of the body recess
A feature is that a part of the head body is plastically deformed so as to be crushed.
A method of manufacturing a golf club head according to claim 3, wherein
Law . 5. The head body has an opening on its face surface.
Forming a recess and forming a recess on the inner surface of the recess
The outer circumference is the same as the inner circumference of the recess of the head body.
Or a feb that is slightly smaller than the inner peripheral shape of the recess.
After inserting the base body into the recess of the head body,
By press-molding the body, part of the face body is
A convex portion that is plastically deformed and engages with the concave portion of the head body is formed.
Method of manufacturing golf club head characterized by forming
Law . 6. The recess is near the bottom surface of the recess of the head body.
The inner surface of the recess and the bottom of the recess near the recess.
By the side, the outer peripheral part of the back surface of the face body is plastically deformed outward.
Providing a protrusion to be integrated or a separate body,
6. The golf club according to claim 5, wherein the golf club is molded.
Lab head manufacturing method . 7. A head body has an opening on its face surface.
The recess is formed and the bottom of the recess and the bar of the head body are formed.
An opening is formed on the front surface of the head
It is the same as the inner circumference of the recess of the body or the inner circumference of the recess
Be slightly smaller than the bottom of the recess.
A protruding part that protrudes from the back surface that is in contact with and fits into the opening
Insert the formed face body into the recess of the head body, and
Between the protruding portion of the base body and the opening of the head body.
It is characterized by being caulked and joined on the back side of the body
Golf club head to do.