JP3242001B2 - Manufacturing method of metal wood head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a method for manufacturing a metal wood head.

[0002]

2. Description of the Related Art Conventionally, metal wood heads (hereinafter, referred to as metal heads)
Abbreviated as head. ), The sole body was separately formed by the lost wax method, and the sole body was fitted to the head body by integrally forming the crown and hosel parts of the head by the lost wax method, and integrated by welding. And JP-A-63-154186 shown in FIG.
As disclosed in the above-mentioned publication, a face member 17, a sole member 19 having a divided hosel portion 18, a crown member 20 having a divided hosel portion, and a shaft insertion portion 21 are separately formed by forging such as pressing of titanium or a titanium alloy material. Molding, and joining these members.
9 and an L-shaped reinforcing rib 22 for reinforcing the face member 17, and are fixed to the inside of the rear part of the back weight 25 having a specific gravity greater than that of titanium or a titanium alloy, and are integrated by welding to form a metal wood head. The main body,
A so-called four-piece type metal wood head 24 in which a shaft tip portion 23 is attached to the shaft insertion portion 21 and joined and integrated is known.

[0003]

However, these conventionally known metal wood heads have the following problems. That is, by the lost wax manufacturing method, the sole member is separately formed by the lost wax manufacturing method on the metal wood head main body in which the crown part and the hosel part of the metal wood head are integrally formed, joined to the metal wood head main body, and welded. Since the integrated product is a cast product, segregation of the molten metal component, pinholes and other defects during casting are liable to occur, and the crystallinity of the deposited metal material is large. Since the mechanical strength is reduced, it is necessary to increase the thickness of the outer shell itself of the metal wood head constituting the metal wood head in order to improve the durability of the metal wood head. Therefore, the weight of the metal wood head increases, and it is not possible to add a new back weight,
There is a disadvantage that the volume ratio of the metal wood head is also reduced and the sweet spot cannot be increased.

[0004] In order to solve these problems,
A so-called four-piece type metal wood head 2 as disclosed in JP-A-63-154186 shown in FIG.
4 are known. In these four-piece type metal wood heads 24, in order to form each member by forging such as pressing a titanium or titanium alloy material,
Since the thickness of the outer shell constituting the metal wood head 24 can be reduced, there is an advantage that the volume ratio of the metal wood head 24 can be increased. Further, by fixing a back weight 25 made of lead having a higher specific gravity than titanium or a titanium alloy constituting the metal wood head to the inside of the rear portion, the position of the center of gravity G of the head is located behind the center of the head main body. Therefore, the center of gravity G
And the distance to the face, that is, the depth of the center of gravity increases,
The sweet area that is proportional to the depth of the center of gravity can be expanded, and the head body is made of titanium alloy to reduce the weight of the head, reduce the moment of inertia when swinging, and swing the golf club quickly even with a small force. Is disclosed.

Certainly, in the conventional combination of a golf club head made of titanium or a titanium alloy and a back weight, assuming that the specific gravity is larger than that of titanium or a titanium alloy, it is made of lead having a specific gravity of about 11.34. Since the back weight is fixed to the inside of the rear part, the volume ratio of the back weight itself increases, and the back weight swings to the left and right from the center of the head body. To play. However, expanding the sweet area is effective in that even beginners can hit a golf ball straight if they hit the ball in the sweet area, but the golf course course,
If it is not a simple course setting that says that it is only necessary to fly straight, and if it is a dog leg, advanced players dare to slice (fade) or hook (draw) balls. Had to hit.

[0006] Therefore, between intermediate and advanced golfers, a golf club head made of a titanium or titanium alloy golf club head with a back weight inserted therein has a larger sweet area and a more controllable golf club. It was desired that a head be provided.

In addition, in these conventional golf club heads, as a method of fixing the back weight, a method of directly adhering or welding to the inside of the rear portion of the head body is used. In addition, peeling or cracking may occur on the bonding surface, and the back weight may be removed. On the other hand, in the welding method, the back weight made of iron or brass can be fixed relatively firmly, but it is generated at the time of welding but remains, and these welding chips are peeled off by repeated hitting balls, and abnormal noise is generated in the head body. Had the problem that it occurred. In addition, as described above, in the case of lead back weights, the compatibility of both metals is poor even when they are welded to a titanium alloy head body. There was a risk of peeling from the part.

[0008]

SUMMARY OF THE INVENTION To solve the above problems, the present invention relates to a combination of a golf club head made of titanium or a titanium alloy and a back weight having a specific gravity larger than that of titanium or a titanium alloy. Since a back weight made of a tungsten alloy having a specific gravity of about 17 to 19 is separately formed and fixed to the inside of the back face of the back face, the volume ratio of the back weight itself becomes smaller than in the past, and the head body Can be concentrated in one point, the position of the center of gravity G of the head can be shifted to the left or right from the position of the substantially central portion of the face surface or the position of the central portion, and the head can be unevenly distributed. Increase the distance, that is, the depth of the center of gravity, and set the position of the sweet area, which is proportional to the depth of the center of gravity, closer to the center of the face, closer to the heel, or closer to the toe. Theft becomes possible, in which the effect of saying so strike the ball of Tamasuji slices slightly and hook slightly in Intermediate and advanced users.

Further, the back weight made of a tungsten alloy according to the method for manufacturing a metal wood head can be formed by a flange-shaped bottom and a concave projection. In the metal wood head according to the present invention, the thickness of the face hosel member integrally formed by forging is greater than the thickness of the crown member or sole / back face member formed by the forging or pressing. It can be formed thick or the same thickness.

In the forging process according to the present invention, a round bar-shaped material is hot forged, and in this case, a face hosel member can be formed by a semi-enclosed (burring) forging method. In that case, it can be formed at once by using a finishing die, and it is of course possible to form by using a nail type, a wasteland type, and a finishing die in order. Furthermore, when forming a crown member or a sole / back face member, a plate-shaped material can be hot forged, hot pressed, cold forged, or formed by cold pressing. It is possible. However, in order to prevent springback due to cold working, it is desirable to adopt a method of hot forging or hot pressing.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a face portion of a metal wood head made of pure titanium or a titanium alloy material, and an extension portion and a hosel portion extending from the entire periphery of the face portion toward the rear of the head are forged. And molded simultaneously as a pre-face hosel member, trimming the pre-face hosel member
A hosel member is formed, joined to the extension of the face hosel member, and forged or pressed from a pure titanium or titanium alloy material into a hemispherical shape extending from the crown to the back face from the extension. A pre-crown member formed by processing is formed, the pre-crown member is trimmed to form a crown member, and the crown member and the face hosel member are joined, and the lower end of the hosel portion of the heel portion passes from the toe portion through the back face portion. Forging or purging pure titanium or a titanium alloy material so that the side wall portion is integrally erected from the sole portion over the portion, and the back face portion has a back weight fitting perforated portion having a back weight locking step portion. Presole by pressing
After the back face member is formed, trimming is performed, and then a separately formed tungsten alloy back weight is inserted into the back weight fitting perforated portion, and then fitted and fixed by forging or pressing to form a sole back face member. Forming a golf club head by joining the respective members, welding the joined portions, and then forming the golf club head so that a shaft can be attached to the hosel portion. It is.

The tungsten alloy back weight according to the method for manufacturing a metal wood head is formed on the back face portion of the sole back face member by forming a flange-shaped bottom portion and a concave projection portion. After inserting the back weight into the back weight fitting perforated portion, when forging or press fitting is performed, the flange portion of the flange bottom is locked to the sole back face member, and the concave portion of the concave projection is It is crimped and deformed and firmly fixed to the sole / back face member.

Further, the forging process or the like is joined to the crown member and the face hosel member, and the side wall portion is integrally formed upright from the sole portion from the toe portion to the lower end portion of the hosel portion of the heel portion through the back face portion. A sole / back face member formed by press working is used. Even if the crown member and the sole back face member are formed to be thinner than the face hosel member, the metal member has sufficient strength as a metal wood head. Since it is possible to mass-produce by using and simple press working, productivity is further improved.

In the metal wood head according to the present invention, the members are joined together, and the joints are welded to form a metal wood head. A metal wood head formed by forming a metal wood head and a method for manufacturing the same, wherein a shaft hole for inserting a shaft may be formed, for example, in order to perform processing so that a shaft can be mounted on the hosel portion. It is also possible to form the over hosel for covering and mounting the shaft by copying. In this way, since the hosel part is forged at the same time by solid processing, the hosel part can be processed after adjusting the lie angle, face angle and loft angle, and vice versa. Since it is also possible to adjust the lie angle, face angle and loft angle after processing the hosel part with the shaft mounting, it can respond to various lie angle, face angle and loft angle. is there.

As a feature of the metal wood head according to the present invention, for example, a face hosel member, a crown member, and a sole back face member are formed of a titanium alloy or a pure titanium material as in the embodiments described later. By designing and combining the stiffness, elastic modulus and wall thickness of each material, the mechanical impedance of the finished metal wood head can be harmonized, preventing the uncomfortable feeling of hitting sound and improving the rebound characteristics Becomes

[0016]

1 to 8 show an embodiment of the present invention.
As shown in FIG. 1, a face portion 2 of a metal wood head 1 made of pure titanium or a titanium alloy material and the face portion 2
The extending portion 3 and the hosel portion 4 extending from the entire circumference toward the rear of the head are simultaneously and integrally formed by forging to form a pre-face hosel member 5a.
The hosel member 5a is trimmed to form the face hosel member 5, which is joined to the extension 3 of the face hosel member 5, and further extends from the crown 3 to the back face 7 from the extension 3. A pre-crown member 8a is formed by forging or pressing a pure titanium or titanium alloy material into a hemispherical shape, and the pre-crown member 8a is trimmed into a crown member 8, and the crown member 8 and the face hosel are formed. Joined to member 5,
From the toe portion 9 to the lower end portion 4a of the hosel portion 4 of the heel portion 10 through the back face portion 7, the side wall portion 11 is integrally erected from the sole portion 12, and the back face portion 7 is provided with a back weight locking step portion 14a. A pure titanium or titanium alloy material is forged or pressed to form a presole / back face member 13a, and then trimmed to have a back weight fitting perforated portion 14 having the back weight fitting perforated portion 14. After inserting the separately formed tungsten alloy back weight 15, the sole and back face member 13 are fitted and fixed by forging or press working, and the respective members are joined.
A method for manufacturing a metal wood head 1, comprising: forming a golf club head by welding the joint portion 1 </ b>A; and forming the golf club head by attaching the hosel portion to a shaft.

The back weight 15 made of a tungsten alloy according to the method for manufacturing the metal wood head 1 is characterized in that it is formed by a flange-shaped bottom portion 15a and a concave projection portion 15b. After inserting the back weight 15 into the back weight fitting perforated portion 14 formed in the back face portion 7 of the sole back face member 13, when the fitting is fixed by forging or pressing, the flange-shaped bottom portion 15a The flange portion is a step 14a for locking the back weight of the sole back face member 13.
And the concave portion 15c of the concave projecting portion 15b is caulked and deformed to form the caulked portion 16 and is firmly fixed to the sole / back face member 13.

As a method of trimming in the method of manufacturing a metal wood head of the present invention, a method such as profile cutting can be used. As another method, a punching method using a punching die of each member shape is used. Thereafter, a method of cutting or polishing and trimming can also be performed efficiently. When the face hosel member 5, the crown member 8, and the sole back face member 13 are formed, a material having a shape such as a round bar, a plate, or a rectangle may be used depending on the required thickness of each member. In addition to being able to be formed by forging or press working, when the wall thickness is thin, it is also possible to press-work a thin plate-shaped material and mass-produce it.

The face hosel member 5, the crown member 8, and the sole back face member 13 of the present invention.
The following metal materials can be used as the material used in the method. That is, pure titanium materials and titanium alloy materials (Ti-6Al-4V, Ti-4Al-22
V, Ti-15V-3Cr-3Al-3Sn, Ti-
4.5Al-3V-2Fe-2Mo, Ti-10V-2
Materials such as Fe-3Al, etc) can be appropriately selected and used.

(Embodiment 1) As an embodiment of the metal wood head 1 of the present invention, as shown in FIG. 5A, the material of the face hosel member 5 is Ti-4Al- of a titanium alloy material. 22V, Ti-4.5Al-3V-
If a round bar-shaped material such as 2Fe-2Mo is used and a semi-enclosed type (bend-out) forging is used by hot forging, as shown in FIG. The shape can be formed by forging, and in that case, the face
The thickness of the hosel member 5 is about 2.0 mm to about 3.5.
It is desirable to set it to about mm. Further, trimming is performed to form the face hosel member 5 shown in FIG. The thickness of the face portion 2 is preferably about 2.5 mm to 3.0 mm. Furthermore,
The material of the crown member 8 and the sole back face member 13 is Ti-4Al-22V of titanium alloy material.
Also, if Ti-4.5Al-3V-2Fe-2Mo or the like is used, the required shape can be formed by forging or press working since the ductility is relatively good. In this case, the thickness of the crown member 8 and the sole / back face member 13 can be set to about 0.8 mm to about 2.0 mm, but the thickness is about 1.0 mm to 1.5 mm. If it is thick, the metal wood head 1 can maintain durability.

The back face portion 7 of the sole back face member 13 is provided with a back weight fitting perforated portion 14.
After inserting a separately formed tungsten alloy back weight 15 into the back weight fitting perforated portion 14 and then fitting and fixing it by forging or pressing to form the sole / back face member 13, As shown in FIGS. 7 and 8, the shape of the back weight fitting perforated portion 14 and the back weight 15 is formed by perforating and forming the shape that conforms to the outer shape of the back face portion 7 of the metal wood head 1. The depth of the center of gravity increases, and the sweet area proportional to the depth of the center of gravity can be expanded. Further, in the present invention, the back weight 1
7, the shape of the back face part 7 as shown in FIG. 7, and the tongue part 9 side of the head main body is made to have a wide eggplant shape or a bead shape, so that the head part is intentionally formed from the toe part. Since the center of gravity can also be arranged, a ball having a slightly slicing (fade) ball can be hit. or,
Conversely, by making the shape of the back weight 15 wider on the heel portion 10 side, it becomes possible to hit a ball of a ball with a slight hook (draw). The shape of the back weight 15 is a flange-like bottom 15a and a concave protrusion 15b.
When the concave portion 15c is formed, the concave portion 15c of the concave projecting portion 15b is caulked and deformed, and becomes the caulked portion 16 to be firmly fixed to the sole / back face member 13.

In addition, the tungsten alloy back weight according to the present invention has an elongation of 3 when sintered metal is obtained by powder metallurgy using tungsten powder.
A material having a physical property of about 0%, for example, a W-Ni-Fe-based material containing tungsten: 93%, nickel: 4.9%, and iron: 2.1% as a tungsten alloy composition. It is preferred to use. Also, W-Ni-
As an Fe-based tungsten alloy, tungsten: 9
A material having a composition containing 5%, nickel: 3.5%, and iron: 1.5%, and having an elongation of about 25 to 30% can also be used.

In the crown member 8 and the sole / back face member 13, the aforementioned face hosel member 5 is used.
Since it is not necessary to have such a high strength, for example, a pure titanium material can be forged or formed into a required shape by press working. In this case, if the thickness of the crown member 8 or the sole back face member 13 is about 1.5 mm to 2.0 mm,
The metal metal wood head 1 that is satisfactory in terms of durability and weight distribution can be supplied. Furthermore, compared to the above-mentioned titanium alloy material, the pure titanium material is more economical because the raw material cost is lower. As a material of the face hosel member 5, it is of course possible to use a pure titanium material, and of course, a combination of the crown member 8 and the sole / back face member 13 with a pure titanium material is also possible.

[0024]

As described above, in the method for manufacturing a metal wood head according to the present invention, the specific gravity of a combination of a golf club head made of titanium or a titanium alloy and a back weight is larger than that of titanium or a titanium alloy. As a specific example, since a back weight made of a tungsten alloy having a specific gravity of about 17 to 19 is separately formed and fixed to the inside of the rear portion of the back face, the volume ratio of the back weight itself becomes smaller than in the past, and the head body Since the head can be arranged intensively at one point, the position of the center of gravity G of the head can be shifted to the left and right from the position of the substantially central portion of the face surface or the position of the central portion, so that the distance between the center of gravity G and the face surface can be increased. In other words, while increasing the depth of the center of gravity, the position of the sweet area proportional to the depth of the center of gravity should be closer to the center of the face, to the heel, and to the toe. It is possible to set, in which an effect of said so strike the Tamasuji ball such that the slice (fade) Pounds or hooks (draw) Pounds in Intermediate and advanced.

In addition, the back weight made of the tungsten alloy according to the present invention is formed on the flange-shaped bottom portion and the concave protruding portion, so that the back weight fitting hole formed on the back face portion of the sole back face member. After inserting the back weight into the part, when fitting and fixing by forging or pressing, the flange part of the flange-shaped bottom is locked to the sole back face member, and the concave part of the concave protrusion is caulked and deformed. Since it is firmly fixed to the sole / back face member, there is no looseness or gap, no sound generation, and no unpleasant feeling to the golfer.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a metal wood head according to the present invention.

FIG. 2 is a diagram showing a back hose fitting member, a crown member, and a sole back face member according to the present invention, in which a back weight fitting hole is formed in a back face portion, and a tungsten alloy formed separately in the back weight fitting hole portion. FIG. 7 is a perspective view showing affirmative insertion of a back weight.

FIG. 3 is a side perspective view showing a face hosel member, a crown member, and a sole / back face member according to the present invention.

FIG. 4A shows a metal wood head according to the present invention;
Sectional drawing which shows the cross section of -A part.

FIG. 5 is an explanatory view showing a manufacturing process of the face hosel member of the metal wood head according to the present invention.

FIG. 6 shows a sole of a metal wood head according to the present invention.
Explanatory drawing which shows the manufacturing process of a back face member.

FIG. 7 shows the sole of the metal wood head according to the present invention.
FIG. 9 is an explanatory view showing a manufacturing process of inserting a back weight into the back face member.

FIG. 8 shows a sole of a metal wood head according to the present invention.
Explanatory drawing which shows the manufacturing process which fitted and fixed the back weight to the back face member.

FIG. 9 is a perspective view showing a conventionally known metal wood head.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 metal wood head 1A joint 2 face 3 extension 4 hosel 4a hosel lower end 5 face hosel 5a pre-face hosel 5b material 5c burr 6 crown 7 back face 8 crown 8a pre-crown Member 9 Toe portion 10 Heel portion 11 Side wall portion 12 Sole portion 13 Sole / back face member 13a Presole / back face member 13b Burr 14 Back hole fitting perforation portion 14a Flange engagement portion 15 Back weight 15a Flange bottom portion 15b Concave protrusion 15c Concave part 16 Caulking part 17 Face member 18 Split hosel part 19 Sole member 20 Crown member 21 Shaft insertion part 22 Reinforcement rib 23 Shaft tip part 24 Metal wood head 25 Back weight

Continuing from the front page (72) Inventor Katsunori Tamaki 3877-8 Takaro, Yoro-cho, Yoro-gun, Gifu Prefecture Inside Yoro Plant, Mizuno Co., Ltd. (72) Inventor Kenji Kanakawa 1 58 Yoshiyuki, Saijocho, Higashihiroshima-shi, Hiroshima 58 In-company (72) Inventor Koji Ono 1-58 Yoshiyuki, Saijo-cho, Higashihiroshima-shi, Hiroshima Prefecture Examiner, Central Industrial Co., Ltd. Yasumitsu Tsuchiya (56) References JP-A-8-131522 (JP, A) 7-275408 (JP, A) JP-A-7-328151 (JP, A) JP-A-6-121846 (JP, A) JP-A 9-215786 (JP, A) JP-A-7-265475 (JP, A) A) Jiko 4-46776 (JP, Y2) Registered utility model 3022478 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) A63B 53/00-53/16 B21K 17/00

Claims (2)

(57) [Claims] 1. A metal wood head made of pure titanium or a titanium alloy material, a face portion, an extension portion extending from the entire periphery of the face portion toward the rear of the head, and a hosel portion are simultaneously and integrally formed by forging. Formed as a face hosel member, trimmed the pre-face hosel member to form a face hosel member, joined to the extension of the face hosel member, and further from the crown to the back face from the extension A pre-crown member formed by forging or pressing a pure titanium or titanium alloy material into a hemispherical shape extending over the portion is formed, and the pre-crown member is trimmed to form a crown member. Joined to the hosel member, and from the toe section through the back face section to the lower end of the hosel section of the heel section Forging or pressing a pure titanium or titanium alloy material so that the side wall portion is integrally erected from the sole portion and the back face portion has a back weight fitting perforated portion having a back weight locking step. After forming the presole and back face member by processing, trimming is performed, and then a separately formed tungsten alloy back weight is inserted into the back weight fitting hole, and then the sole and back are fitted and fixed by forging or pressing. A metal wood head formed by forming a face member, joining the members, welding the joint to form a golf club head, and then processing the hosel to attach a shaft. Manufacturing method. 2. The method for manufacturing a metal wood head according to claim 1, wherein the tungsten alloy back weight according to the method for manufacturing a metal wood head is formed by a flange-shaped bottom portion and a concave protrusion. .