JP2691497B2 - Golf club head manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention relates to the manufacture of golf club heads .
More specifically, the present invention relates to a method for manufacturing a golf club head in which a face body made of different kinds of metals and a head body can be firmly bonded to each other.

[0002]

2. Description of the Related Art As a method of manufacturing a golf club head made of metal called a metal head, there is an integral method in which the whole is integrally formed by casting, forging, or the like, and a plurality of portions are formed separately and then these are welded. There is a division method to be integrated, the integration method is mainly applied to iron club heads, and the division 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 weld and combine.

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. Light metals such as pure 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 The moment of inertia of the surroundings can be increased, and the height of the center of gravity of the head, the depth of the center of gravity from the face, and the like can be easily adjusted. 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. Further, in the case of welding, the weld bead appears on the surface even after finish polishing, so that the aesthetic 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. Further, when the face body and the head main body are fixed by using a fastening member such as a pin, the number of parts and the number of processing steps increase and the cost increases, and the pin is exposed on the head surface, so that the appearance is deteriorated.

Therefore, an object of the present invention is to provide a method of manufacturing a golf club head which is easy and strong to bond a face body made of different kinds of metal and a head body and which is excellent in appearance.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 provides a head body and a face body.
Are made of different metals, and the outer peripheral surface of the face body or the
Groove on at least one of the inner peripheral surface of the recess
Forms fine irregularities, and the face of the face body
A built-up portion is formed on the peripheral edge of the surface, and the face body is
Press pressure in the recess to crush the buildup part
By making fine irregularities bite into the other surface
It is characterized in that the body is fixed in the recess.

According to a second aspect of the present invention, the concave groove is formed in the head.
It should be formed near the open end on the face side of the recess of the main body.
It is characterized by.

According to a third aspect of the invention, in the head body,
A step is formed on the inner peripheral surface of the recess, and it is formed on the outer peripheral surface of the face body.
Form a step portion that abuts the step portion of the recess, and
Specially, it is formed on the inner peripheral surface of the recess close to the step.
Sign.

[0010]

In the method of manufacturing a golf club head according to claim 1, the face body is pressed and pressed in the recess of the head body to crush the build-up portion of the face surface peripheral portion of the face body. Since the meat is moved, even if there is a gap between the groove or the fine irregularities formed on at least one of the outer peripheral surface of the face body or the inner peripheral surface of the recess of the head main body and the other surface, the groove or the fine groove is formed. The unevenness can be surely made to bite into the other surface. Therefore, it is possible to obtain a golf club head having a large bonding strength between the face body and the head body.

In the manufacturing method according to the second aspect, since the concave groove is formed in the vicinity of the opening end on the face surface side of the concave portion of the head body, when the built-up portion of the face body is crushed by pressurization. The flesh of the face body can be easily and surely bite into the groove of the recess.

In the manufacturing method according to the third aspect, a step portion is formed on the inner peripheral surface of the recess of the head body, and a step portion contacting the step portion of the recess is formed on the outer peripheral surface of the face body, Since the groove of the recess is formed close to this step, the meat of the face can be easily and reliably bited into the groove of the recess when the build-up portion of the face is crushed by pressing. be able to.

[0013]

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 symbols in these drawings.

1 to 6 show a first embodiment in which the present invention is applied to the head of an iron golf club. First, referring to FIGS. 1 to 4, an iron club head 10 includes a head body 11 having a flat face surface 12, a neck portion 13 formed integrally with the head body 11, and a face surface 12 of the head body 11. And a face body 15 housed in a recess 14 formed in.
The head body 11 is further formed with an inner bottom surface of the recess 14 and an open space 16 in the back surface of the head body 11, and the back surface of the face body 15 is in contact with the inner bottom surface of the recess 14. Therefore, the face body 15 is the head body 11
You can't get out behind.

More specifically, the head body 11 and the face body 15 are made of different metals. For example, the face body 15 is made of a light metal such as an aluminum alloy, pure titanium, or a titanium alloy. However, the face body 15 is press-pressurized in the recess 14 of the head body 11 to be plastically deformed, as will be described later. Excellent ones are preferable, for example, pure titanium and Ti-15V-3Cr-3S.
β-type titanium alloys such as n-3Al alloy and Ti-15Mo-5Zr-3Al alloy are particularly suitable. On the other hand, the head body 11 is made of a metal material having a larger specific gravity than the face body 15, such as stainless steel or beryllium copper. The head body 11 and the face body 15 are manufactured by, for example, casting, forging, or the like. The face body 15 may have a constant thickness, but in this embodiment, the thickness of the face body 15 increases from the top side toward the sole side. When the face body 15 having such a structure is used, the mass on the sole side of the head body 11 having a larger specific gravity than the face body 15 can be displaced to the back side, so that the depth of the center of gravity from the face of the head is increased. Can be made. Further, since a part of the back surface of the face body 15 is exposed from the void 16 to the back surface side of the head body 11, characters, symbols,
By giving a pattern etc. in advance by stamping etc.,
It can be used as a display unit.

As shown in FIGS. 4 and 5, in this embodiment, the fine concavities and convexities 17 and 18 respectively formed on the inner peripheral surface of the recess 14 and the outer peripheral surface of the face body 15 bite into each other to make the face body. 15 and the head body 11 are connected.

FIGS. 5 (a) and 5 (b) show the manufacturing process of the golf club head 10 having the above structure, and FIG. 6 shows the face body 15 before it is pressed in the recess 14 of the head body 11. The shape of the face body 15 is shown. As shown in these drawings, fine concavities and convexities 17 and 18 are preliminarily formed on the inner peripheral surface of the recess 14 and the outer peripheral surface of the face body 15 over the entire circumference. In addition, a build-up portion 19 is formed on the entire periphery of the peripheral edge portion of the face surface of the face body 15.

As shown in FIG. 5A, the head body 11
Is attached to the fixed mold 20, and the face body 15 is inserted into the recess 14 of the head body 11. And face body 1
5 is pressed and pressed in the recess 14 of the head body 11 by the pressing die 21. As a result, as shown in FIG. 5B, the built-up portion 19 of the face body 15 is crushed, and the meat of the face body 15 moves to move the outer peripheral surface of the face body 15 and the recess 14 of the head body 11. The gap between it and the inner surface is filled,
The fine irregularities 17 on the outer peripheral surface of the face body 15 and the fine irregularities 18 on the inner peripheral surface of the recess 14 bite into each other. Thus, the outer peripheral surface of the face body 15 and the recess 1 of the head body 11 are
Even if there is a gap with the inner peripheral surface of 4, it is possible to secure the meat that fills the gap, so that it is possible to surely bite both the concaves and convexes 17, 18. Therefore, it is possible to obtain a golf club head having a large bonding strength between the face body 15 and the head body 11.

The fine irregularities 17 and 18 on the outer peripheral surface of the face body 15 and the inner peripheral surface of the recess 14 in the above embodiment are formed by using a roughing end mill, respectively.
As shown in FIG. 5, the unevenness 17 extends substantially parallel to the face surface of the face body 15. Although illustration is omitted,
The unevenness 18 on the inner peripheral surface of the recess 14 also extends substantially parallel to the face surface 12. Therefore, when these fine irregularities 17 and 18 bite into each other, the effect of preventing the face body 15 from coming off is further enhanced. Generally, the face body 15 has a recess 1 of the head body 11 even when a force of about 1 ton is applied.
Although it is desirable that the face body 15 having a smooth outer peripheral surface be press-fitted into the recess 14 of the head main body 11, the face body 15 will slip out of the recess 14 when a force of 1 ton is applied. On the other hand, in the golf club head having the above structure, the head body 11 is made of stainless steel (SUS630).
And the face body 15 is a β type titanium alloy (Ti-15V
-3Cr-3Sn-3Al alloy) has been confirmed to be able to withstand a force of about 2 tons.

7 and 8 show a modified example of the face body 15. As shown in FIG. 7, the face body 1
The fine recesses 17 on the outer peripheral surface of 5 may extend in a direction inclined with respect to the face surface. Also, as shown in FIG.
Fine irregularities 17 may be formed on the outer peripheral surface of the face body 15 by sandblasting over the entire circumference. Further, the fine irregularities 17 on the outer peripheral surface of the face body 15 may be formed by knurling or etching. Similarly, the fine irregularities 18 on the inner peripheral surface of the recess 18 may also extend in a direction inclined with respect to the face surface 12, and
It can be formed by sandblasting, knurling, etching or the like. Furthermore, when the face body 15 and the head body 11 are formed by casting, it is possible to form fine irregularities on the outer peripheral surface of the face body 15 and the inner peripheral surface of the recess 14 during casting.

9 (a) and 9 (b) show another embodiment of the present invention. In this embodiment, fine irregularities 18 are formed in advance on the inner peripheral surface of the recess 14 of the head body 11 over the entire circumference, but the outer peripheral surface of the face body 15 is a smooth surface. Therefore, in the case of this embodiment, when the face body 15 is pressed and pressed to crush the built-up portion 19 of the face body 15, the outer peripheral surface of the face body 15 digs into the irregularities 18 on the inner peripheral surface of the recess 14 and becomes strong. A joint portion will be formed.

Although not shown, the face body 15
There may be a case where fine irregularities are formed in advance only on the outer peripheral surface of the above, and the inner peripheral surface of the recess 14 is previously formed into a smooth surface. In this case, the face body 15 is pressed and pressed to form the overlay portion. By crushing, the irregularities on the outer peripheral surface of the face body can be made to bite into the inner peripheral surface of the recess 14, so that a strong joint portion similar to that in the above embodiment can be formed.

10 to 12 show still another embodiment of the present invention. Referring to these drawings, in this embodiment, as shown in detail in FIG. 11A, a step portion 22 is formed over the entire circumference on the inner peripheral surface of the recess 14 of the head body 11, and this step A groove 23 having a substantially V-shaped cross section is formed on the inner peripheral surface of the recess in the vicinity of the portion 22. And
A step portion 24 that abuts the step portion 22 of the recess 14 is formed on the outer peripheral surface of the face body 15 over the entire circumference, and a buildup portion 19 is formed on the peripheral edge portion of the face surface of the face body 15. Therefore, when the face body 15 is pressed and pressed in the recess 14 of the head body 11, as shown in FIGS.
As shown in (b), the buildup portion 19 is crushed and the face body 1
The outer peripheral surface of 5 is pressed against the inner peripheral surface of the recess 14, and the meat of the face body 15 bites into the groove 23. Therefore,
Also in this embodiment, the face body 15 and the head body 11
It is possible to obtain a club head in which and are firmly coupled.

Further, in this embodiment, since the face body 15 and the head body 11 are previously in contact with each other at the step portions 22 and 24 and the concave groove 23 is formed in the vicinity thereof,
The meat of the face body 15 can be easily and surely moved to the groove 23. Further, in this embodiment, since the recessed groove 23 is formed in the vicinity of the opening end on the face surface side of the recess 14, the movement of the meat into the recessed groove 23 when the buildup portion 19 is crushed is easy and Be certain.

The concave groove 23 may be formed over the entire circumference of the inner peripheral surface of the recess 14, for example, the head body 11
The desired purpose can be sufficiently achieved by forming the sole side, the heel side, and the toe side at three locations, or by forming the three locations and the top side at a total of four locations.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the embodiments of the above-mentioned embodiments, and various constituent elements may be included in the respective components within the scope of the invention described in the claims. You can make changes.
For example, in the above embodiment, the recess 1 is formed in the head body 11.
Although the cavities 16 that open to the inner bottom surface and the back surface of 4 are formed, the formation of such cavities 16 may be omitted.
Further, the face body may be fitted to the hollow space 16 of the head and exposed on the back surface of the head body 11. Furthermore, the present invention is not limited to heads for iron clubs,
It goes without saying that the same can be applied to the method of manufacturing the head for the wood club.

[0027]

As is clear from the above description, the present invention
According to the method for manufacturing a golf club head according to the above, since the face body is pressed and pressed in the recess of the head body to crush the built-up portion of the peripheral portion of the face surface of the face body to move the meat, the outer peripheral surface of the face body is Or, even if there is a gap between the groove or the fine unevenness formed on at least one of the inner circumferential surfaces of the recess of the head body and the other surface, the groove or the fine unevenness must surely bite into the other surface. You can Therefore, it is possible to easily obtain a golf club head having a large bonding strength between the face body and the head body.

[Brief description of the drawings]

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

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.

FIG. 6 is a perspective view showing a shape of a face body used in the manufacturing method of FIG. 5 before press working.

FIG. 7 is a perspective view showing a modified example of the face body before press-pressing.

FIG. 8 is a perspective view showing another modified example of the face body before press-pressing.

9A and 9B are cross-sectional views showing another embodiment of the golf club head according to the present invention and the manufacturing process thereof.

10 (a) and 10 (b) are sectional views showing still another embodiment of the golf club head according to the present invention and the manufacturing process thereof.

11A and 11B are enlarged cross-sectional views of a main part showing a step of the manufacturing method shown in FIG.

12 is a perspective view showing a shape of a face body used in the manufacturing method shown in FIG. 10 before press-pressing.

[Explanation of symbols]

 10 club head 11 head body 12 face surface 14 recess 15 face body 17 fine irregularities on the outer peripheral surface of the face 18 fine irregularities on the inner peripheral surface of the recess 19 built-up portion 22 stepped portion on the inner peripheral surface of the recess 23 inner peripheral surface of the recess Concave groove 24 Step portion on the outer peripheral surface of the face body

Claims (3)

(57) [Claims] 1. A head body and a face body are made of different metals.
Formed on the outer peripheral surface of the face body or the recess of the head body
Grooves or fine irregularities on at least one of the inner peripheral surfaces
And the meat on the peripheral edge of the face surface of the face body.
Form a raised part and press the face body in the recess of the head body.
Pressurize and squeeze the built-up portion to create concave grooves or fine irregularities.
Face body inside the recess by digging into the other surface
Of golf club heads characterized by sticking to the
Method. 2. The concave groove is a face of a concave portion of a head body.
It is formed in the vicinity of the open end of the surface side.
A method for manufacturing the described golf club head. 3. A step portion is formed on the inner peripheral surface of the recess of the head body.
And contact the stepped portion of the recess on the outer peripheral surface of the face body
To form a step portion, and the concave groove close to the step portion.
3. The inner peripheral surface of the recess is formed.
Manufacturing method of golf club head.