JP2002000773A - Metal wood head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a metal wood head reduced in thickness as a whole, formed into a cup shape easily in a forging process, increased in volume, and improved in shock resistance by cutting the front or back face of a part equivalent to an area ranging from a face part to an extension part of a preface hosel member in a forged metal wood head. SOLUTION: This metal wood head 1 is constructed by connecting the face hosel member 5, which is constructed by integrally molding the face part 2, the extension part 3 extending from the face part 2 overall circumference to the head back side, and a hosel part 4 having no shaft directional welded part together by forging, and a head body member 11 constituted of a crown part 5, a sole part 12, and a back face part 7 to each other. In this metal wood head 1, the face hosel member 5 is forged of a rod-shaped material 5A and provided with a cut part 5d formed by cutting a part or the whole of one or both of the front face 5c and the back face 5b in the forged face part.

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 metal wood head.

[0002]

2. Description of the Related Art Conventionally, a metal wood head (hereinafter referred to as a metal wood head)
Abbreviated as head. )), A sole body was separately molded by a lost wax method to a head body in which a crown part and a hosel part of a head were integrally formed by a lost wax method, fitted to the head body, and integrated by welding. And the Japanese Utility Model 61-33970 shown in FIG.
The sole member 2 having the face member 18 and the divided hosel portion 19 by press working as disclosed in
A crown member 21 having a zero and a split hosel portion 19;
The shaft insertion portion 22 is separately formed, and these members are joined. At this time, an L-shaped reinforcing rib 23 for reinforcing the sole member 20 and the face member 18 is used, and the metal wood head is integrated by welding. A so-called four-piece type metal wood head 25 is known, which is a main body, and further has a shaft tip portion 24 attached to the shaft insertion portion 22 and joined and integrated.

FIG. 11 shows a Japanese Utility Model Publication No. 61-33972.
The face member 18, the sole member 20, and the crown member 21 are separately formed by press working, and these members are joined, assembled and integrated by welding, and a shaft is formed on the formed hosel portion 26. A so-called three-piece type metal wood head 25 in which a distal end portion 24 is attached and bonded and integrated is known.

Recently, a metal wood head made of a titanium alloy or an aluminum alloy having a low specific gravity and a high strength has become a boom. Since these titanium alloy metal wood heads are lightweight and strong, the volume ratio of the metal wood head body can be made larger than that of a stainless steel metal head made by the conventional lost wax method. 12 and JP-A-6-8045 shown in FIG.
No. 5 discloses a so-called two-piece type metal wood head and a method for manufacturing these metal wood heads. The features of these two-piece metal wood heads include a face side member 30 in which a face portion 27, an extension portion 28 extending from the face portion 27 to the rear of the metal wood head and a hosel portion 29 are integrally formed, The hosel portion 29 is formed by joining a plate-shaped member continuous with the face portion 27 and the extension portion 28 into a tubular shape. It is formed by welding the butted portions.

FIGS. 8 and 9 show a metal wood head (Patent Registration No. 300983) invented by the present inventors.
No. 3) will be described.

That is, the face portion 1 of the metal wood head
The round portion 7 and the hosel portion 14 having no welded portion in the shaft axial direction are simultaneously formed integrally by forging, so that the extended portion 16 extending from the entire periphery of the face portion 17 toward the rear of the metal wood head and the hosel portion 14 having no welded portion in the shaft axial direction. By forging a bar-shaped material 15A having a shape such as a bar shape or a rectangular shape, a pre-face hosel member 15a having a hosel portion 14 shape and a cup-shaped face portion 15b is simultaneously and integrally formed,
An excess burr 15c is removed by trimming, and a bar-shaped material having a round bar shape or a rectangular shape is formed by forging or press working so as to be joined to the extending portion 16 of the face hosel member 15. Forging or pressing of a rod-shaped material having a shape such as a round bar or a rectangular shape with a side wall integrally erected from the sole portion from the crown member and toe portion to the lower end of the hosel portion of the heel portion through the back face portion. A pre-crown member formed by forging or pressing into a hemispherical shape extending from the crown portion to the back face portion further from the extension portion formed by the above is arranged, and the pre-crown member and the presole / back face member are arranged. Molded and trimmed the pre-crown member to form a crown member, and the pre-sole / back face member After forming the sole and back face members, joining each of the members, welding the joints to form a metal wood head, and then applying a process to attach the shaft to the hosel part. Metal wood heads are also already known.

[0007]

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. For this reason, the weight of the metal wood head is increased, the volume ratio of the metal wood head is reduced, and the sweet spot cannot be enlarged.

Therefore, in order to solve these problems,
A so-called four-piece type metal wood head as disclosed in Japanese Utility Model Publication No. 61-33970 shown in FIG. 10 is known. In these four-piece type metal wood heads, each member is pressed by pressing. The molding has the advantage that the thickness of the outer shell itself constituting the metal wood head can be reduced, so that the volume ratio of the metal wood head can be increased.

However, since the shaft insert member is welded to the three types of members and the hosel portion is integrally formed by welding, distortion is easily generated in these welded portions, and particularly, the hosel portion is easily deformed. However, there is a problem in that the setting of the important lie angle and loft angle in the metal wood head is deviated. In addition, there is a problem that the welded portion becomes long as a whole, which takes time and effort in the manufacturing process, and increases the manufacturing cost. Further, since it is necessary to pre-mold the three types of members and the shaft insertion member, the number of types of dies increases, the cost of the dies increases, and this is a factor that raises manufacturing costs.

[0010] For this reason, FIG.
There is known a so-called three-piece type metal wood head 25 disclosed in Japanese Patent No. 972, but in these three-piece type metal wood heads, a metal wood head is formed in order to form each member by press working. Since the thickness of the outer shell itself can be reduced, the volume ratio of the metal wood head can be increased. However, on the other hand, the thickness of the outer shell itself constituting the metal wood head is reduced, and in particular, the thickness of the face member and the crown member is reduced, so that the hitting durability is reduced. Was.

Further, since the three types of members are welded to form a short hosel portion and the tip of the shaft is inserted and joined, the dimensional accuracy of the hole diameter of the shaft insertion hole opened in the hosel portion varies. When the lie angle, face angle, and loft angle, which are important in a metal wood head, are set, there is a problem that the method of joining and fixing to the tip of the shaft is difficult and irregularity due to clearance fit occurs. In addition, since the welded portions are concentrated on the hosel portion, there is a possibility that physical properties may be deteriorated due to heat history in the hosel portion, and the welding of the hosel portion takes time and effort in the manufacturing process, and the manufacturing cost is high. Had the problem of becoming. Further, since three types of members need to be preformed, the number of types of dies increases, the cost of dies increases, and this is a factor that raises manufacturing costs.

On the other hand, for the purpose of improving the hitting ball durability, forging is performed using a metal wood head as disclosed in JP-A-5-317467 shown in FIG. 12 and JP-A-6-80455 shown in FIG. Since a part of the material is formed into a plate shape and further bent into a tubular shape to form a hosel part and integrated by welding, the strength of the hosel part tends to vary, and welding of the hosel part is inevitable. Since the difference in hardness between the portion and the non-welded portion was different, there was a possibility that the lie angle slightly changed in a portion where the hardness of the hosel portion was low during repeated hitting.

[0013] Patent registration No. 3 invented by the inventors of the present application.
In 00833, as shown in FIGS. 8 and 9, a bar-shaped material is forged to form a face hosel member having a cup shape having a face portion, so that the face portion and the extension portion have a large thickness distribution. In order to manufacture a metal wood head with the intention of improving the coefficient of restitution when hitting a golf ball by reducing the thickness of the face part, which has become so demanded recently, the face part and the extension of the face hosel member are required. It is necessary to make the thickness of the protruding portion thinner, and improvement for that purpose has been desired.

Further, in these conventional metal wood heads, since the volume ratio of the metal wood head must be increased, the thickness of the outer shell itself of the metal wood head becomes thinner as a whole. Impact resistance was not sufficient, and further improvement was required. Therefore, it has been desired to supply a metal wood head having good hitting durability and a larger volume ratio.

[0015]

SUMMARY OF THE INVENTION The present invention is directed to a metal wood head invented to achieve the above object, comprising a face portion and an extending portion extending from the entire periphery of the face portion toward the rear of the head. A face hosel member formed by forging a hosel portion having no welded portion in the shaft axis direction and a head body member formed of a crown portion, a sole portion, and a back face portion are joined and integrated. In the metal wood head, the face hosel member is forged from a rod-shaped material, and either one or both surfaces of the front or back surface of the forged face portion are cut, so that the face portion and the entire face portion are formed in a subsequent process. In the forging process of forming a cup shape having an extension extending from the circumference toward the rear of the head, the cup shape is easy. It can be formed, and the extension of the face extending from the entire circumference toward the head rear and the bent portion of the face do not cause cracks or uneven thickness distribution. It is possible to provide a metal wood head that is thinner and more durable than a product.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present application is directed to a hosel having no face portion, an extended portion extending from the entire periphery of the face portion toward the rear of the head, and a welded portion in the axial direction of the shaft. In a metal wood head obtained by joining and integrating a face hosel member formed integrally by forging with a head body member formed of a crown portion, a sole portion, and a back face portion, the face hosel member has a rod-like shape. A metal wood head characterized by being forged from a material, and cutting one or both of the front and back surfaces or both surfaces of the forged face portion.

Next, the invention according to claim 2 of the present application is directed to a hosel portion having no face portion, an extension portion extending from the entire circumference of the face portion toward the rear of the head, and a weld portion in the shaft axial direction. In a metal wood head obtained by joining and integrating a face hosel member integrally formed by forging with a head body member composed of a crown portion, a sole portion and a back face portion, the face hosel member is a bar-shaped material. To form a hosel portion and a plate-like face portion, and to cut or rework one or both of the front surface and the back surface of the plate-like face portion, and then forge again to forge the face. A metal wood head characterized in that a face hosel member having an extension extending from the entire periphery of the head toward the rear is formed.

Further, in the invention according to claim 3 of the present application, the amount of machining of the face portion of the face hosel member is 0.05 mm to 0.1 mm from the thickness of the forged face portion.
A metal wood head characterized by being processed in a range of 5 mm.

Further, in the invention according to claim 4 of the present application, the thickness of the extension of the face hosel member extending from the entire periphery of the face portion toward the rear of the head is smaller than the thickness of the face portion. A metal wood head characterized by being formed.

In the metal wood head according to the present invention, the face hosel member integrally formed by the forging process is formed of a steel material, an aluminum alloy material, a titanium alloy material, a magnesium alloy material or the like. On the other hand, the head member including the crown portion, the sole portion, and the back face portion is formed by forging or pressing a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material, a magnesium alloy material, or the like. And can be formed by precision casting.

The head member including the crown portion, the sole portion and the back face portion may be formed integrally, or may be separately formed like a crown member, a sole member and a back face member. . Further, it may be integrally formed like a sole / back face member.

The method for manufacturing a metal wood head of the present invention includes a face portion of the metal wood head, an extending portion extending from the entire periphery of the face portion toward the rear of the metal wood head, and a welding portion extending in the axial direction of the shaft. A pre-face having a hosel part shape and a plate-like face part by forging a rod-shaped material having a shape such as a round bar shape or a rectangular shape so that a hosel part without having The hosel member is integrally formed, and either one or both of the front surface and the back surface of the plate-like face portion of the pre-face hosel member or both surfaces are cut by forging to forge the thickness of the face portion. Thinner than before, then forging the pre-face hosel member again from the face and the entire circumference of the face toward the rear of the head. After the extending portion formed cup-shaped extending, Ki remove excess burrs by trimming,
To be joined to the extension of the face hosel member,
A pre-crown member formed by forging or pressing a bar material having a shape such as a round bar shape or a rectangular shape and a toe portion from the toe portion through the back face portion to the lower end of the hosel portion of the heel portion, the side wall portion is integrally formed from the sole portion. A bar-shaped material having a shape such as a round bar shape or a rectangular shape that is erected is forged or formed into a hemispherical shape extending from the crown portion to the back face portion from the extended portion formed by forging or pressing. A pre-crown member formed by press working is arranged, the pre-crown member and a pre-sole / back face member are formed, the pre-crown member is trimmed into a crown member, and the pre-sole / back face member is trimmed to form a sole / back sole member. Metal wood head by joining each of the above members as a back face member and welding the joint After forming, it is possible to manufacture method for a metal wood head, characterized in that subjected to machining that enables mounting the shaft hosel portion.

As described above, in the present invention, the thickness of the face hosel member from the face portion to the extending portion from the face portion is formed smaller than that of the conventional one.
In addition, since the thickness of the crown member and the sole / backface member is also similarly reduced, no step is generated due to the thickness at these joints, so that the time required in the welding process is improved and the strength is also improved. It is.

In the metal wood head of the present invention, the face hosel member integrally formed by forging can be selected from iron, steel, aluminum alloy, titanium alloy, magnesium alloy and the like. For the crown member and sole / back face member, forged or pressed steel or aluminum alloy, titanium alloy, pure titanium, magnesium alloy, or the like can be used. It is also possible to use those formed by a wax manufacturing method.

In the metal wood head according to the present invention, the thickness of the face hosel member formed by forging is reduced by cutting, and the crown member and sole formed by forging or pressing are formed. -Although it is formed to be thinner than the thickness of the back face member, cutting can be performed with abrasive grains such as grinding, sand blasting or sand shot, and turning and milling from cutting efficiency and workability. Is preferred.

In the forging process according to the present invention, a bar-shaped material is hot forged, and in this case, a semi-sealed type (burring) is used.
Form a face hosel member by forging, then
Either one or both of the front surface and the back surface of the face portion are cut by cutting, and furthermore, the finishing portion extends at a stretch from the face portion and the entire circumference of the face portion toward the rear of the head. Can be formed into a cup shape, and of course, it can be formed by sequentially using a nail type, a wasteland type, and a finish type.

Further, when forming the crown member and the sole / back face member, the plate-shaped material can be hot forged, hot pressed, cold forged,
It is also possible to form by cold press. However, in order to prevent springback due to cold working, it is desirable to adopt a method of hot forging or hot pressing.

In the forging process of the present invention, a bar-shaped material is hot forged to form a face hosel member, and then either one of the front surface of the plate-shaped face portion or the back surface of the face portion or both surfaces is formed. The oxide film layer (α) formed on the surface of the face hosel member for cutting
Since the scale can be removed, the durability of the metal wood head against hitting ball stress is improved. That is, in the conventional metal wood head, since it is a step of light polishing at the time of finishing processing, an oxide film layer (α scale) having a high surface hardness and a brittle property tends to remain,
Cracks occur from these remaining oxide film layers,
There is a possibility that the metal wood head may be damaged, and therefore, the durability of the metal wood head against hitting ball stress may be reduced.

Further, in the metal wood head of the present invention, the face portion, the extending portion extending from the entire periphery of the face portion toward the rear of the metal wood head, and the hosel portion having no welded portion in the shaft axial direction are provided. In order to use the face hosel member which is simultaneously formed by forging, the hosel part is separately formed, like a conventionally known metal wood head, and welded so as to be integrated with other members, It has never been said that the hosel part is formed by forging, since the hosel part is formed by forging at the same time. A streamline occurs, and the toughness against tensile stress in the direction of this line increases,
Since a hosel part with high toughness can be formed, the strength is also strong, and the hosel part is not deformed even if the ball is repeatedly hit, so that there is no possibility that the lie angle, face angle or loft angle will be deviated.

Further, a forging process or a joint is formed by joining the crown member and the face hosel member, and a side wall portion is integrally formed upright from the sole portion from the toe portion to the lower face 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.

Further, in the metal wood head of the present invention, the above members are joined together, and the joined portions are welded to form a metal wood head, and then processed so that a shaft can be attached to the hosel portion. It is a metal wood head characterized by forming a metal wood head,
In order to process the hosel portion so that the shaft can be mounted, for example, a shaft hole for inserting the shaft may be formed, or an over hosel for covering and mounting the shaft may be formed 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.

Further, 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 rigidity, elastic modulus and wall thickness of each material, the natural frequency of the finished metal wood head is harmonized, preventing the uncomfortable feeling of hitting sound and improving the rebound characteristics. It becomes possible.

[0033]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) An embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. A face hosel member 5 in which an extending portion 3 extending and a hosel portion 4 having no welded portion in the shaft axis direction are integrally formed by forging, and a crown portion 6, a sole portion 12, and a back face portion 7 are provided. Metal wood head 1 obtained by joining and integrating head body members 11
In the above, the face hosel member 5 is a bar-shaped material 5
A metal wood head 1 having a cut portion 5d formed by cutting one or both of the front surface 5c of the face portion and the back surface 5b of the face portion forged from A or both or both surfaces. is there. (Embodiment 2) As another embodiment of the present invention, as shown in FIGS. 2 to 6, a face portion 2, an extension portion 3 extending from the entire periphery of the face portion 2 toward the rear of the head, and a shaft axial direction. A face hosel member 5 formed integrally with a hosel portion 4 having no welded portion by forging, a crown portion 6, a sole portion 7, and a back face portion 8.
In the metal wood head 1 obtained by joining and integrating a head main body member 11 composed of: a face hosel member 5 forged from a bar material 5A to form a hosel portion 4 and a plate-like face portion, After cutting one or both of the front surface 5b of the face portion or the back surface 5b of the face portion, or a part or all of both surfaces, forging again, the head portion 2 extends from the entire circumference of the face portion 2 toward the head rear. A face hosel member having an extension 3 is formed, and a burr 5f is trimmed to form a finish on the face hosel member 5, which is joined to the extension 3 of the face hosel member 5 to form the extension. A material having a shape such as a round bar or a rectangular shape in a hemispherical shape extending from the crown portion 6 to the back face portion 7 from the crown portion 3 is formed by forging or press working. Pre crown member shaped and, a crown member 8 to trim the pre crown member, the crown member 8 and the face hosel member 5
And a bar-shaped member having a shape such as a round bar shape or a rectangular shape in which a side wall portion is integrally erected from the sole portion 12 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. Of the presole / back face member 13a formed by forging or pressing, and trimming the burr 13b of the presole / back face member 13a.
3, a metal wood head formed by joining the above members, welding the joined portions to form a metal wood head, and then performing processing so that a shaft can be attached to the hosel portion 4. Yes, it can be manufactured by the manufacturing method as described above. (Embodiment 3) As another embodiment of the present invention, a cut portion 5 of the face portion of the face hosel member 5 is provided.
The processing amount of d is 0.05 from the thickness of the forged face part.
The metal wood head 1 is characterized by being cut in the range of 0.5 mm to 0.5 mm.

In another embodiment of the present invention, the thickness of the extension 3 extending from the entire periphery of the face portion 2 of the face hosel member 5 toward the rear of the head is greater than the thickness of the face 2. The metal wood head 1 is also formed to be thin.

The face hosel member 5 integrally formed by the forging process is made of a steel material, an aluminum alloy material, a titanium alloy material or the like, while the crown member 8 and the sole back face member are formed. Reference numeral 13 denotes a metal wood head 1 characterized by being integrally formed by forging or pressing a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material, or the like.

Incidentally, as a trimming method in the method for manufacturing the metal wood head of the present invention, a method such as copying cutting is also possible, and as another method, a punching die of each member shape is used. After punching, cutting, polishing, trimming, and laser cutting can be performed efficiently. When the face hosel member 5, the crown member 8, and the sole back face member 13 are formed, a rod-shaped material having a round bar shape or a rectangular shape is forged by a necessary thickness of each member. Can be molded.

The face hosel member 5 integrally formed by forging according to the method for manufacturing the metal wood head 1 is formed of a steel material, an aluminum alloy material, a titanium alloy material, or the like, while the crown member is formed. 8
The sole / back face member 13 is the metal wood head 1 characterized by being integrally formed by forging or pressing a steel material, an aluminum alloy material, a titanium alloy material, a pure titanium material, or the like. In addition, as disclosed in FIG. 2B and FIG. 4A, the thickness distribution on the back surface of the face portion is intentionally thin in the vicinity of the heel portion and the thickness distribution in the portion from the toe portion to the vicinity of the hit ball portion. By doing so, the coefficient of restitution to the golf ball is improved, and the flight distance of the golf ball is improved. Furthermore, by forming the portion near the heel portion thin and increasing the thickness from the toe portion to the vicinity of the hitting portion, a step portion 5e is formed at the boundary portion, and the step portion 5e reduces the stress concentration at the time of hitting the ball. And the durability of the metal wood head itself is improved.

In addition, the face hosel member 5, the crown member 8, the sole back face member 1 of the present invention.
The following metal materials can be used as the material used for No. 3. That is, among steel steel materials, in carbon steel for machine structural use (S25C, S35C, S45C, etc),
For chromium molybdenum steel (SCM440, etc), for chromium steel (SCr440, etc), for manganese steel (SMn443, etc), for stainless steel (SUS
304, SUS420J2, SUS630, etc) can be used. As the aluminum alloy material (A20
14, A2017, A2024, 5000-6000 series and A7N01, A7075, etc) can be used. In addition, pure titanium materials and titanium alloy materials (Ti-6
Al-4V, Ti-4Al-22V, Ti-15V-3
Cr-3Al-3Sn, Ti-4.5Al-3V-2F
e-2Mo, Ti-10V-2Fe-3Al, etc)
And the like can be appropriately selected and used.

(Embodiment 4) FIGS. 2A, 2B, 3 and 4 show an embodiment of the metal wood head 1 of the present invention.
(A) and (b), and as shown in FIGS.
The material of the hosel member 5 is T of titanium alloy material.
i-4Al-22V, Ti-4.5Al-3V-2F
As shown in FIG. 2B, when a round bar-shaped material 5A such as e-2Mo is used and a semi-closed type (bending) forging is used by hot forging, the ductility is good and the strength is high. A pre-face hosel member having a hosel portion shape and a plate-like face portion is integrally formed, and either one or both of the front surface and the back surface of the plate-like face portion of the pre-face hosel member is cut. Processing and cutting in the range of 0.05 mm to 0.5 mm from the thickness of the forged face portion to make the face portion thinner than at the time of forging, and then forging the pre-face hosel member again As shown in FIGS. 4 (a) and 4 (b), a face portion and an extension portion extending from the entire periphery of the face portion toward the rear of the head are formed into a cup shape. To get rid of It can form a main shape with forging, also, in that case, as the thickness of the face hosel member 5, it is preferable to set to about 2mm~ about 3 mm.

Further, the face hosel member 5 shown in FIG. 4 is formed by trimming. The thickness of the face portion 2 is preferably about 2.5 mm to 3.0 mm. Further, as the material of the crown member 8 and the sole back face member 13, Ti-4Al-22V or Ti-4.5Al-3V-2 of a titanium alloy material is used.
If Fe-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 is about 0.8 mm to about 2.0 mm.
mm can be set to about 1.0 mm
1.5mm thick metal metal wood head 1
As a result, durability can be maintained.

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,
A 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.

(Embodiment 5) As another embodiment of the metal wood head 1 of the present invention, a face hosel member 5
When an aluminum alloy material is used as the material of (A2014, A2017, A2020, 5000)
~ 6000 series, A7N01, A7075, et
If c) or the like is used, the required shape can be easily formed by forging because of good ductility and strength. or,
In this case, the thickness of the face hosel member 5 can be set to about 4.0 mm to about 6.0 mm. In particular, the thickness of the face portion 2 is preferably about 5.0 mm. Further, as the material of the crown member 8 and the sole / back face member 13,
Aluminum alloy materials (A2014, A2017, A
2024, 5000-6000 series or A7N0
1, A7075, etc) and the like have relatively good ductility, so that the required shape is formed by forging. In that case, the crown member 8 and the sole / back face member 1 are formed.
The thickness of 3 can be set to about 2.0 mm to about 4.0 mm.

The sole / back face member 13 does not need to be as strong as the face hosel member 5 described above.
014, A2017, etc) or the like, and can be formed into a required shape by forging or pressing. If the thickness of the sole / back face member 13 in this case is about 3.0 mm, a satisfactory metal wood head 1 can be supplied in terms of durability and weight distribution. Aluminum alloy (5000-6000 series or A
7N01, A7075, etc), etc., compared to the above-mentioned aluminum alloys (A2014, A2017, etc)
Such materials are cheaper in terms of raw material costs and are more economical.

(Embodiment 6) As an embodiment of the metal wood head 1 of the present invention, the face hosel member 5 is made of carbon steel for machine structure (S25C,
S35C, S45C, etc), chrome molybdenum steel (SCM440, etc), chrome steel (SCr440,
etc), for manganese steels (SMn443, etc),
Stainless steel (SUS304, SUS420J2, SU
S630, etc) and the like can be used. In that case, the thickness of the face hosel member 5 is
It can be set to about 2.0 mm to about 3.0 mm. In particular, as the thickness of the face portion 2,
About 2.5 mm is preferable. Further, as the material of the crown member and the sole back face member, carbon steel for machine structural use (S25C, S35C, S45C,
etc) and chrome molybdenum steel (SCM440, et.
c), chromium steel (SCr440, etc), manganese steel (SMn443, etc), stainless steel (SUS
304, SUS420J2, SUS630, etc) or the like can be used. In this case, the thickness of the crown member and the sole / backface member is about 0.5
Although it can be set to about 2.0 mm to about 2.0 mm, if the thickness is about 1.0 mm, the durability can be maintained as a metal wood head.

When stainless steel SUS630 is used as the face hosel member 5 and stainless steel SUS630 is used as the crown member and the sole back face member 13, the thickness of the face hosel member 5 is reduced. Is about 1.5 mm to 2.5 mm, and the thickness of the sole back face member 13 is about 1.
The durability can be sufficiently maintained at about 2 mm.

[0046]

As described above, in the metal wood head according to the present invention, the face portion of the metal wood head, the extending portion extending from the entire periphery of the face portion toward the rear of the metal wood head, and the shaft axial direction. A face hosel member having a welded portion without a welded portion is simultaneously formed by forging, and the face hosel member is forged from a rod-shaped material, and the hosel portion and the plate-shaped face portion are forged. After forming one or both surfaces of the surface of the plate-shaped face portion or the back surface of the face portion, the extension portion extending toward the head rear from the entire circumference of the face portion by forging again. Forming a face hosel member having a face portion and an extending portion extending rearward from the entire circumference of the face portion to the head in a later step In the forging process to form the shape of the cup shape, the cup shape can be easily formed, and the thickness of the extending portion extending toward the rear of the head from the entire periphery of the face portion gradually decreases in a tapered shape from the face portion. The thickness of the face is more than that of conventional forged products, because it is not likely to produce a step due to thickness at the joint with the head body member, it is unlikely that distortion will occur during welding, and there is no crack or uneven thickness distribution. This has the effect of providing a metal wood head that can be made thin and has durability.

Further, in the metal wood head of the present invention, either one or both of the front surface and the back surface of the plate-shaped face portion of the face hosel member is cut by cutting. Since the oxide film layer (α scale) formed on the surface of the hosel member can be removed, the durability of the metal wood head against hitting ball stress is improved. Like the conventionally known metal wood head, the hosel part is separately molded and welded so as to be integrated with other members, or it is said that it is welded after processing the plate-shaped thing into a cylindrical shape Because the hosel part is formed integrally by forging at the same time, the strength is strong and the hosel part is not deformed even after repeated hits, so the lie angle and face angle and There is an effect that the hit ball durability is remarkably improved without a risk of causing a deviation in the loft angle.

Also, a crown member is formed by forging or pressing into a hemispherical shape which is joined to the extension of the face hosel member and further extends from the crown to the back face from the extension. Since the metal wood heads with various designs can be supplied by appropriately changing the design applied to the surface of the crown member, a mold for the crown member is used. By changing only one, it is possible to respond to the design change, so the mold cost can be reduced,
This has the effect of suppressing manufacturing costs and supplying a cheaper metal wood head.

In the metal wood head of the present invention, each of the above members is joined, and the joined portion is welded to form a metal wood head. Then, the metal wood head is processed so that a shaft can be attached to the hosel portion. A metal wood head characterized by having a head formed therein.In order to be able to perform processing so that a shaft can be mounted on the hosel portion, for example, a shaft hole for inserting a shaft may be formed, or a shaft may be coated and mounted. The over hosel can also be formed by copying. In this way, since the hosel part is formed simultaneously by forging in a solid state, the hosel part can be processed after adjusting the loft angle and lie angle, and conversely, the hosel part Since the loft angle and the lie angle can be adjusted after the shaft is mounted on the portion, it is possible to cope with various loft angles and the lie angle.

In the metal wood head of the present invention, since the thickness of each of the above members can be selected and combined in various ways, the volume ratio can be increased without lowering the strength of the metal wood head itself. To play.

[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 perspective view showing a rod-shaped material according to the present invention and a perspective view showing a back side of a preface hosel member.

FIG. 3 is a perspective view showing a front side of a preface hosel member according to the present invention.

FIG. 4 is a perspective view showing a back surface side of a preface hosel member according to the present invention and a preface hosel member A.
Sectional drawing which shows the cross section of -A part.

FIG. 5 is a perspective view showing a process of processing a sole / back face member from a presole / back face member according to the present invention.

FIG. 6 is a perspective view showing a configuration of a face hosel member and a head body member of the metal wood head according to the present invention.

FIG. 7 is a side perspective view showing a configuration of a face hosel member and a head body member of the metal wood head according to the present invention.

FIG. 8 is a perspective view showing a back surface side of a conventionally known rod-shaped member and a pre-face hosel member.

FIG. 9 shows a pre-face hosel member and a pre-face hosel member B of a conventionally known metal wood head.
Sectional drawing which shows the cross section of -B part.

FIG. 10 is a perspective view showing a conventionally known metal wood head.

FIG. 11 is a perspective view showing a conventionally known metal wood head.

FIG. 12 is a perspective view showing a conventionally known metal wood head.

FIG. 13 is a perspective view showing a conventionally known metal wood head.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 metal wood head 2 face portion 3 extension portion 4 hosel portion 4 a lower end of hosel portion 5 face hosel member 5 A rod material 5 a preface hosel member 5 b front surface of plate-like face portion 5 c back surface of plate-like face portion 5 d Machining part 5e Step part 5f Burr 6 Crown part 7 Back face part 8 Crown member 9 Toe part 10 Heel part 11 Head body member 12 Sole part 13 Sole back face member 13a Presole back face member 13b Burr 14 Hozel part 15 Face・ Hosel member 15A Bar-shaped material 15a Pre-face hosel member 15b Cup-shaped face part 15c Burr 16 Extension part 17 Face part 18 Face part 19 Hosel part 20 Sole part 21 Crown part 22 Shaft insertion part 23 Reinforcement B 24 Shaft tip 25 Metal wood head 26 Horsel 27 Face 28 Extension 29 Horsel 30 Face member 31 Back member 32 Metal wood head

Claims (4)

[Claims] 1. A face portion (2), an extension portion (3) extending from the entire periphery of the face portion (2) toward the rear of the head, and a hosel portion (4) having no welded portion in a shaft axial direction. ) Is integrally formed by joining a face hosel member (5) integrally formed by forging with a head body member (11) composed of a crown portion (6), a sole portion (12), and a back face portion (7). In the metal wood head (1), the face hosel member (5) is forged from a rod-shaped material (5A), and the forged front surface (5c) or the back surface (5b) of the face portion.
A metal wood head (1) having a cut portion (5d) obtained by cutting a part or all of one or both surfaces of the metal wood head. 2. A face portion (2), an extension portion (3) extending from the entire circumference of the face portion (2) toward the rear of the head, and a hosel portion (4) having no welded portion in a shaft axial direction. ) Is integrally formed by joining a face hosel member (5) integrally formed by forging with a head body member (11) composed of a crown portion (6), a sole portion (7), and a back face portion (8). In the metal wood head (1), the face hosel member (5) is forged from a bar material (5A) to form a hosel portion (4) and a plate-like face portion. After cutting one or both of the front surface (5b) and the back surface (5b) of the face portion or both or both surfaces, forging is performed again to extend from the entire circumference of the face portion (2) toward the head rear. Extension A metal wood head (1), wherein a face hosel member having a portion (3) is formed. 3. The processing amount of the cut portion (5d) of the face portion of the face hosel member (5) is in the range of 0.05 mm to 0.5 mm from the thickness of the forged face portion. Metal wood head (1) according to claim 1 or 2, characterized in that it is a metal wood head (1). 4. The thickness of the extension (3) of the face hosel member (5) extending rearward from the entire periphery of the face (2) to the head is greater than the thickness of the face (2). The metal wood head (1) according to claim 1, 2 or 3, wherein the metal wood head is also formed to be thin.