JP2006167033A - Golf club head, manufacturing method thereof and golf club - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club head which is improved in other characteristics while suppressing the deterioration of a hitting feeling for a golfer, its manufacturing method, and a golf club provided with the head. <P>SOLUTION: An iron golf club head comprises: a head body 1A provided with a sole part 2, a top edge part 3, a face part 4, a heel part, a toe part and a back part 7; and a different material 9 positioned at the rear part of the center part of the face part 4, adhered to the head body 1A without a gap on the cross section of the center part in a toe-to-heel direction and inserted into the head body 1A so that a joining surface on the side of the face part with the head body 1A is extended along the face part 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a golf club head, a manufacturing method thereof, and a golf club, and more particularly to a golf club head in which a different material is incorporated in a head body, a manufacturing method thereof, and a golf club provided with the head.

  The hit feeling of the golfer is an important issue in the golf club head.

  For example, if the face part of a golf club head is formed thinly, the repulsive force is increased, and the flight distance is increased in response to the desire to increase the flight distance, the golfer's feel may be deteriorated.

  It is important to improve other characteristics (such as strength characteristics and resilience characteristics) of the golf club head while suppressing the deterioration of the hit feeling.

  By the way, in Japanese Patent Laid-Open No. 10-192459 (conventional example 1), the head body is made of a malleable metal material having a small specific gravity, has a specific gravity larger than the material of the head body, and has a melting point of the head body. A golf club head is disclosed in which a member made of a material higher than the forging temperature of the material is incorporated in the head body, and the head body is formed by forging.

  In JP 2001-314535 A (conventional example 2), a recess is formed on the back surface of the head body so as to leave the periphery of the back surface, and a plate material is provided on the bottom surface of the recess. An iron golf club head is disclosed in which a hollow portion is formed by welding a back shell having a shape matching the above to a peripheral portion of a recess.

Furthermore, in JP-A-11-70191 (conventional example 3), a round bar-shaped base material made of soft iron is forged to form a head body member having a predetermined shape, and subsequently, a position above the sole of the head body member In this hole, a hole having a specific gravity greater than that of soft iron is inserted, and then a lid is inserted and welded. In this state, a finish forging process is further performed. A golf club head is disclosed.
Japanese Patent Laid-Open No. 10-192458 JP 2001-314535 A JP-A-11-70191

  However, the golf club head as described above has the following problems.

  When a different material is built in the head main body, it is important that the different material is closely adhered to the head main body from the viewpoint of suppressing the deterioration of the hit feeling.

  On the other hand, for example, in Conventional Example 1, since the member built in the head main body is not deformed in the forging process, a structure in which the member and the head main body are in close contact with each other without a gap is not realized. Further, the golf club head according to Conventional Example 2 is not provided with a head body so as to be in close contact with the entire circumference of the plate material in the cross-section in the toe-heel direction. The configuration is completely different from the club head.

  In Conventional Example 3, a high specific gravity material is inserted into the head body before the forging process for forming the outer shape of the head body is performed. However, in Conventional Example 3, the high specific gravity material is inserted when the outer shape of the head body is formed to some extent, and the joint surface that effectively suppresses the deterioration of the hit feeling only by the subsequent forging process. It seems difficult to get.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a golf club head having improved other characteristics while suppressing deterioration of a golfer's hit feeling, a method of manufacturing the same, and the manufacturing method thereof. An object of the present invention is to provide a golf club having a head.

  A golf club head according to the present invention includes a main body having a face portion, a toe portion, and a heel portion, and a cross section of the center portion in the toe-heel direction, which is located behind the center portion of the face portion and faces the heel portion from the toe portion. And a different material inserted into the main body so that the joint surface on the face side with the main body extends along the face portion.

  According to this configuration, it is possible to improve other characteristics of the golf club head while suppressing deterioration of the hit feeling of the golfer.

  Here, the main body and the different material may be in close contact by diffusion bonding.

  In this case, the effect of suppressing the deterioration of the hit feeling can be further enhanced.

  In one aspect, the golf club head is an iron golf club head, and it is preferable that a different material is disposed from the sole portion of the iron golf club head to the rear of the center portion of the face portion.

  In another aspect, the golf club head is a wood golf club head, and the wood golf club head preferably has a thick portion at the center of the face portion, and a different material is preferably inserted into the thick portion.

  In any of the above aspects, the above-described effect of suppressing the deterioration of the hit feeling is realized.

  In the cross section of the golf club head at the center in the toe-heel direction, a different material is arranged behind the face portion over a length of 50% to 90% of the length of the face portion in the direction along the face surface. It is preferable.

  Thereby, the effect of improving the hit feeling can be sufficiently obtained while the different materials are included in the main body more reliably.

  According to the golf club head manufacturing method of the present invention, the first material and the second material are combined before the forging process by inserting the first material into the second material different from the first material. A step of forming a composite material, and a step of forging the composite material to deform the first and second materials to form an outer shape of the head.

  Thereby, since the first and second materials can be closely adhered to each other, the other characteristics of the golf club head can be improved while suppressing the deterioration of the hit feeling of the golfer.

  Here, it is preferable that an axial hole of the second material is provided in the rod-shaped second material, and the composite material is formed by inserting the first material into the hole.

  This makes it possible to easily combine the first and second materials.

  Further, after the first material is inserted into the bottom of the hole, a cover made of the same material as the second material may be provided on the first material so as to fill the hole, thereby forming a composite material.

  Thereby, in a composite material, a different material (1st material) can be sealed completely.

  Further, a composite material may be formed by providing a plurality of first materials in the hole so as to sandwich a spacer made of the same material as the second material.

  Thereby, in the composite material, a plurality of different materials (first materials) separated from each other can be provided.

  The golf club according to the present invention includes the above-described golf club head or the golf club head manufactured by the above-described manufacturing method.

  Thereby, a golf club with a good hit feeling is provided.

  According to the present invention, it is possible to improve other characteristics of the golf club head while suppressing deterioration of the hit feeling of the golfer.

  Embodiments of a golf club head and a manufacturing method thereof according to the present invention and a golf club having the head will be described below.

  In one aspect, the golf club head according to the present embodiment is an iron golf club head including a head body having a sole portion, a top edge portion, a face portion, a heel portion, a toe portion, and a back portion. In another aspect, the present invention is a wood golf club head including a head body having a sole portion, a crown portion, a face portion, a heel portion, a toe portion, and a back portion.

  A region made of a material (different material) different from that of the main body is provided in a region including the rear of the central portion of the face portion of the head main body. This dissimilar material adheres closely to the head main body in the cross-section at the center in the toe-heel direction (the direction from the toe to the heel). Further, the joint surface on the face part side between the head body and the different material is formed so as to extend along the face part.

  Here, preferably, the different material and the head main body are brought into close contact by diffusion bonding. Diffusion bonding is a state realized in bonding between dissimilar metals, etc., where two objects are bonded to each other by applying atoms and molecules on the bonding surface by applying force and heat simultaneously. It means a state that has become a thing. A method for obtaining diffusion bonding will be described later.

  The diffusion bonding layer has a low crack growth rate and a high fracture strength. Therefore, the feel at impact, noise, and destruction are less likely to occur due to interface peeling due to impact during impact. The thickness of the diffusion bonding layer is, for example, about 10 μm to 1000 μm (preferably about 80 μm to 400 μm, more preferably about 100 μm to 200 μm).

  When the golf club head is an iron golf club head, the different material is provided so as to spread from the sole part to the rear of the center part of the face part, for example. When the golf club head is a wood golf club head having a thick portion at the center of the face portion, the foreign material is inserted into at least a part of the thick portion.

  Although the size of the different material can be changed as appropriate, in the cross-section at the center in the toe-heel direction of the golf club head, the length of the face portion in the direction along the face surface is about 50 to 90 percent (more preferably Is preferably 60 to 80 percent, more preferably 65 to 75 percent, in which the different materials are arranged behind the face portion.

  The head body and the different material are typically made of metal. Examples of metals that make up the head body and different materials include iron such as soft iron, titanium, special steel, stainless steel, aluminum, magnesium, tungsten, copper, nickel, zirconium, cobalt, manganese, zinc, silicon, tin, chromium and These alloys are used.

  Here, S15C, S20C, S25C, S30C, S35C, etc. can be used as soft iron. Moreover, as titanium and titanium alloy, pure titanium 1 type, 2 types, 3 types, 4 types, Ti-5Al-2.5V which is α-based titanium alloy, Ti-3Al-2 which is α-β-based titanium alloy .5V, Ti-6Al-4V, Ti-4.5Al-3V-2Fe-2Mo, β-type titanium alloys Ti-15V-3Cr-3Sn-3Al, Ti-10V-2Fe-3Al, Ti-13V-11Cr -3Al, Ti-15Mo-5Zr, Ti-15V-6Cr-4Al, Ti-15Mo-5Zr-3Al, Ti-20V-4AL-1Sn, Ti-22V-4AL, Ti-3Al-8V-6Cr-4Mo-3Zr Etc. can be used. Stainless steel materials include SUS630, austenitic SUS301, 303, 304, 304N1, 304N2, 305, 309S, 310S, 316, 317, 321, 347, XM7, martensitic SUS410, 420, 431, 440, Precipitation hardening type SUS630 and ferrite type SUS405, 430, 444, etc. can be used. As the special steel, high strength steel, ultra high strength steel, ausforming steel, maraging steel, spring steel, and the like can be used. Further, pure aluminum, 2017, 2024, 7075, 3003, 5052, 5056, 6151, 6053, 6061, etc. can be used as aluminum, and AZ63A, AZ81A, AZ91A, AZ91C, WE54, EZ33A, etc. can be used as magnesium. It is.

  The material used as the head body and the different material is appropriately selected from the above materials. For example, when reducing the weight of the club head, a material having a specific gravity lower than that of the head body is used as the different material. In order to lower the center of gravity of the club head, a different material having a specific gravity higher than that of the head main body is disposed in the vicinity of the sole portion of the club head. That is, as the different material, a material having a specific gravity higher than that of the head body may be used, or a material having a specific gravity lower than that of the head body may be used. May be used. In order to improve the strength of the face portion, a different material having a strength higher than that of the head body is used.

  The head main body is composed of a single member in the portion surrounding the different material, but the other portion may be composed of a plurality of members. Since the head main body is composed of a single member in the portion surrounding the different material, the different material can be wrapped seamlessly (seamlessly).

  As described above, various characteristics (for example, depth of gravity, strength, controllability, rebound characteristics, etc.) of the golf club head can be improved by appropriately selecting a material used as a different material and its arrangement. At this time, the deterioration of the hit feeling can be suppressed by bringing the different material and the head main body into close contact with each other without any gap. Here, although the position where the different material is provided and the shape of the joint surface also affect the hit feeling, as described above, the different material is arranged in the area including the rear of the center portion of the face portion, and the different material and the head body By forming the joint surface so as to extend along the face portion, it is possible to enhance the effect of suppressing the deterioration of the hit feeling. Thus, according to the said structure, the other characteristic of a golf club head can be improved, suppressing the deterioration of a golfer's hit feeling.

  Next, a method for manufacturing the golf club head as described above will be described with reference to FIGS.

  Referring to FIG. 28, in the golf club head manufacturing method according to the present embodiment, first, a round bar-shaped first material 20 (different material) and a round bar-shaped first material having holes for receiving the first material 20 are used. The second material 21 (head body) is prepared, and the first material 20 is inserted into the second material 21 (a hole provided in the second material 21) serving as the head body. The step of forming a composite material by combining the first material 20 and the second material 20, 21 and forging the composite material to deform both the first material 20 and the second material 20 to form the outer shape of the golf club head. Forming. Here, the hole for receiving the first material 20 is provided along the axial direction of the second material 21.

  In the example shown in FIG. 28, the diameters of the first and second materials are about 10 mm and about 26 mm, respectively, and the diameter of the hole provided in the second material 21 for receiving the first material 20 is about 12 mm. It is. Here, titanium is used as the first material 20, and soft iron (S25C) is used as the second material 21. Thereby, compared with the case where a club head is manufactured from the 2nd raw material 21 single-piece | unit, the weight reduction of a club head can be achieved. Further, since a material having a relatively small specific gravity (first material 20) can be collected inside the club head and a material having a relatively large specific gravity (second material 21) can be collected outside the club head, a certain amount can be obtained. The moment of inertia can be secured.

  By performing the above steps, the above-described golf club head is provided. Here, the step of forming the composite material is performed before the forging process is performed. In the forging process, the axial direction (left and right direction in FIG. 28) of the composite material is the toe-heel direction of the club head, and the radial direction of the composite material (for example, the direction perpendicular to the paper surface in FIG. 28) is the face of the club head. -It is performed in the back direction. The step of forming the outer shape of the club head here refers to the case of forming the entire outer shape of the club head and the case of forming the outer shape of a part of the club head, such as the face portion of a wood golf club head. Including.

  As described above, the first and second materials 20, 21 are combined in a rod-shaped stage before forging (for example, in FIG. 28, the first and second materials 20, 21 have a round bar shape). By using the composite material, the outer peripheral surface of the first material 20 and the inner peripheral surface of the hole provided in the second material 21 can be brought into close contact with each other in the subsequent forging process. As a result, the different material (first material) and the head body (second material) can be brought into close contact with each other in the toe-heel direction cross section of the club head. In addition, as shown in FIG. 28, the first material 20 is inserted into the central portion of the axial cross section of the second material 21, so that the different material (first material) is placed behind the central portion of the face portion. It is possible to relatively easily perform a forging process in which a joint surface between the different material and the head body is formed along the face portion.

  Diffusion bonding can be obtained depending on the first and second materials 20, 21 and the forging conditions (temperature, pressure, time). As an example of a method for realizing diffusion bonding, a diffusion bonding method can be considered. In this method, the bonded product is not melted and is pressed in a solid state. As another method for realizing diffusion bonding, a TLP (Transition Liquid-Phase) method is conceivable. In this method, an insert metal is inserted between the joints, and the joints are heated while being pressed from both sides. As a result, the insert metal is melted, and the liquid phase component and the base material component of the bonded product are interdiffused. For example, the forging conditions that cause diffusion bonding in the example shown in FIG. 28 include those listed in Table 1 as an example.

  29 to 32 are views showing modifications of the above-described composite material forming process.

  Referring to FIG. 29, a hole deeper than the entire length of the first material 20 is provided in the second material 21, and after the first material 20 is inserted into the bottom of the hole, the second material is filled. A cover 22 made of the same material as the material 21 may be provided on the first material 20 to form a composite material. Here, the first material 20 and the lid 22 may be provided with protrusions and recesses (for example, broken lines in FIG. 29) having shapes corresponding to each other.

  Thereby, in the composite material, the first material 20 can be completely sealed.

  Referring to FIG. 30, a hollow portion may be provided in a hole provided in second material 21 without providing a lid on first material 20.

  With reference to FIG. 31, the depth of the hole provided in the 2nd raw material 21 can be changed, and the position of the 1st raw material 20 inserted in this hole can be adjusted.

  Referring to FIG. 32, a plurality of first materials 20A, 20B, and 20C may be inserted so as to sandwich spacers 23A and 23B made of the same material as second material 21.

  Thereby, in the composite material, a plurality of different materials (first materials 20A to 20C) separated from each other can be provided. Moreover, the position of each different material can be adjusted by changing the size of the spacer.

  33 to 38 are views showing an axial section of the composite material and a modification thereof.

  Referring to FIG. 33, in the composite material produced through the steps shown in FIGS. 28 to 32, the first and second materials 20, 21 each have a circular axial cross section, Both are combined so that the center of the axial direction cross section of the 2nd materials 20 and 21 may correspond.

  On the other hand, with reference to FIG. 34 and FIG. 35, it is also possible to provide a plurality of holes in the second material 21 and insert the first material into each hole. For example, in the example shown in FIG. 34, the first materials 20A and 20B are provided so as to be aligned in the vertical direction in the axial section of the second material 21. In the example shown in FIG. 35, eight first materials 20 </ b> A to 20 </ b> H are arranged over the entire axial cross section of the second material 21. Thus, the number of the first materials 20 inserted into the second material 21 can be changed as appropriate.

  Moreover, the shape of the axial direction cross section of the 1st and 2nd raw materials 20 and 21 is not limited to a circle. For example, in the example shown in FIG. 36, the notch 200 is provided in the first material 20, and in the example shown in FIG. 37, the notches 200, 210 are provided in the first and second materials 20, 21, respectively. It has been. 36 and 37, the left side corresponds to the face side, and the right side corresponds to the back side. By adopting the configuration as shown in FIG. 36, it is possible to ensure a relatively large thickness of the second material 21 on the face side. Moreover, by setting it as the structure like FIG. 37, the material flow at the time of the forge of the 2nd raw material 21 by the side of a face part can be reduced, and the positional stability of the 1st raw material 20 can be improved. Furthermore, depending on the configuration as shown in FIG. 37, it is possible to easily determine which portion of the composite material corresponds to the face portion side or the back portion side. Furthermore, as shown in FIG. 38, the first material 20 may be provided with a protruding portion 200A.

  In the above-described example, the case where the first material is a columnar solid has been described. However, a plurality of solid pieces, particulate materials, or powder materials may be used as the first material.

  Next, golf club heads according to Examples 1 to 8 of the invention will be described with reference to FIGS.

  FIG. 1 is a rear view of the iron golf club head 1 according to the first embodiment. 2 to 4 are views each showing an example of a cross section (cross section AA in FIG. 1) of the central portion of the iron golf club head 1 in the toe-heel direction.

  The iron golf club head according to the present embodiment is a blade type iron golf club head as shown in FIGS. 1 to 4, and includes a sole portion 2, a top edge portion 3, a face portion 4, and a heel portion. 5, a head body 1 </ b> A having a neck portion 5 </ b> A, a toe portion 6, and a back portion 7. The head main body 1A is connected to the shaft 8, and a grip portion (not shown) is attached to the other end of the shaft 8 to form a golf club.

  The head body 1A is made of soft iron (S25C). A different material 9 is provided inside the head body 1A. The different material 9 is made of titanium, and is provided on the back portion 7 side (rear side) of the face portion 4 so as to extend from the central portion of the face portion 4 to the periphery thereof. Further, the joint surface on the face part 4 side between the head main body 1 </ b> A and the different material 9 is formed so as to extend along the face part 4.

  2 to 4, the head main body 1 </ b> A includes a thick portion 1 </ b> B located on the sole portion 2 side and a thin portion 1 </ b> C located on the top edge portion 3 side. In this embodiment, the different material 9 is arranged from the thick part 1B to the thin part 1C. 2 to 4, the entire circumference of the different material 9 is diffusion-bonded to the head body 1A, and the different material 9 and the head body 1A are in close contact with each other without any gap. The thickness of the different material 9 is relatively large in the thick portion 1B and relatively small in the thin portion 1C.

  Comparing each of the examples shown in FIGS. 2 to 4, in FIG. 2, the different material 9 is located approximately in the middle between the face portion 4 and the back portion 7, and in FIG. 3, the different material 9 is relatively on the face portion 4 side. In FIG. 4, the different material 9 is relatively located on the back portion 7 side. Here, the thickness (t in FIGS. 2 to 4) of the head main body 1A on the face 4 side with respect to the different material 9 is about 1.5 mm in FIG. 2 and about 1.0 mm in FIG. In FIG. 4, it is about 3.0 mm.

  FIG. 5 is a rear view of the iron golf club head 1 according to the second embodiment. 6 and 7 are diagrams each showing an example of a BB cross section in FIG.

  The iron golf club head 1 according to the present embodiment is a modification of the iron golf club head 1 according to the first embodiment, and basically has the same configuration as the iron golf club head 1 according to the first embodiment.

  In this embodiment, as shown in FIGS. 5 to 7, the region where the different material 9 is provided is wider than that in the first embodiment. Specifically, the different material 9 extends from the vicinity of the sole portion 2 to the vicinity of the top edge portion 3.

  Here, in the example shown in FIG. 6, in each cross section in the height direction from the sole portion 2 to the top edge portion 3, the ratio of the thickness of the different material 9 to the total thickness of the head main body 1 </ b> A is substantially constant. On the other hand, in the example shown in FIG. 7, in the thin portion 1C, the ratio of the thickness of the different material 9 to the thickness of the entire head body 1A gradually decreases toward the top edge portion 3 side.

  In the present embodiment, detailed description of the same matters as in the first embodiment will not be repeated.

  FIG. 8 is a rear view of the iron golf club head 1 according to the third embodiment. Moreover, FIG. 9 is a figure which shows CC cross section in FIG.

  The iron golf club head 1 according to the present embodiment is a modification of the iron golf club head 1 according to the first and second embodiments, and is basically the same as the iron golf club head 1 according to the first and second embodiments. It has a configuration.

  In the present embodiment, as shown in FIGS. 8 and 9, the region where the different material 9 is provided is different from the first and second embodiments. Specifically, the different material 9 extends from the vicinity of the sole portion 2 to an intermediate portion of the thin portion 1C.

  In the present embodiment, detailed description of the same matters as in the first and second embodiments will not be repeated.

  FIG. 10 is a rear view of the iron golf club head 1 according to the fourth embodiment. Moreover, FIG. 11 is a figure which shows the DD cross section in FIG.

  The iron golf club head 1 according to the present embodiment is a modification of the iron golf club head 1 according to the first to third embodiments, and is basically the same as the iron golf club head 1 according to the first to third embodiments. It has a configuration.

  In the present embodiment, as shown in FIGS. 10 and 11, the region where the different material 9 is provided is different from the first to third embodiments. Specifically, the different material 9 extends from the vicinity of the sole portion 2 to the central portion of the face portion 4.

  In the present embodiment, detailed description of matters similar to those in the first to third embodiments will not be repeated.

  FIG. 12 is a rear view of the iron golf club head 1 according to the fifth embodiment. Moreover, FIG. 13 is a figure which shows the EE cross section in FIG.

  The iron golf club head 1 according to the present embodiment is a modification of the iron golf club head 1 according to the first to fourth embodiments, and is basically the same as the iron golf club head 1 according to the first to fourth embodiments. It has a configuration.

  In a present Example, as shown to FIG. 12, FIG. 13, the area | region in which the different raw material 9 is provided differs from Examples 1-4. Specifically, the different material 9 extends from the middle part of the thick part 1B to the vicinity of the top edge part 3.

  In addition, in a present Example, detailed description is not repeated about the matter similar to Examples 1-4.

  FIG. 14 is a rear view of the iron golf club head 1 according to the sixth embodiment. FIG. 15 is a view showing a cross section taken along line FF in FIG.

  The iron golf club head 1 according to the present embodiment is a modification of the iron golf club head 1 according to the first to fifth embodiments, and is basically the same as the iron golf club head 1 according to the first to fifth embodiments. It has a configuration.

  In the present embodiment, as shown in FIGS. 14 and 15, the region where the different material 9 is provided is different from the first to fifth embodiments. Specifically, the different material 9 is provided by being divided into different materials 9A and 9B, the different material 9A is provided in the thin portion 1C, and the different material 9B extends from the center portion of the face portion 4 to the vicinity of the sole portion 2. Is provided.

  In addition, in a present Example, detailed description is not repeated about the matter similar to Examples 1-5.

(Modifications of Examples 1 to 6)
FIGS. 16-21 is the rear view which showed the modification of the iron golf club head 1 which concerns on Examples 1-6, respectively.

  Referring to FIG. 16, different material 9 may be arranged from the center portion of the face portion to the vicinity of top edge portion 3. Moreover, in the example shown in FIGS. 1-16, although the different raw material 9 is arrange | positioned over the whole toe-heel direction (for example, horizontal direction in FIG. 1) of a club head, as shown in FIGS. Further, it may be arranged only at the center in the toe-heel direction (FIG. 17), may be arranged from the vicinity of the heel part 5 to the center of the face (FIG. 18), or from the vicinity of the toe part 6 to the face. You may arrange | position (FIG. 19) over a center part.

  In the example shown in FIG. 20, four different materials 9A, 9B, 9C, 9D are arranged so as to be aligned in the toe-heel direction. In the example shown in FIG. 21, a different material 9A located on the heel portion 5 side near the sole portion 2 of the club head and a different material 9B located on the toe portion 6 side near the top edge portion 3 of the club head. Is provided. That is, in the example shown in FIG. 21, two different materials 9A and 9B are arranged so as to be arranged in an oblique direction intersecting the toe-heel direction. Here, in one example, a material having a higher specific gravity than the head main body 1A is used as the different material 9A, and a material having a lower specific gravity than the head main body 1A is used as the different material 9B. In this case, the center of gravity of the club head can be relatively lowered and shifted to the shaft 8 side while suppressing the deterioration of the hit feeling of the golfer. As a result, the iron golf club head 1 that is easy to control the head is provided. The number of different materials provided in the head body can be changed as appropriate.

  FIG. 22 is a perspective view showing the wood golf club head 11 according to the seventh embodiment.

  As shown in FIG. 22, the wood golf club head according to this embodiment includes a sole portion 12, a crown portion 13, a face portion 14, a heel portion 15, a neck portion 15 </ b> A, a toe portion 16, and a back portion. 11 is provided. The head body 11A is connected to the shaft 18, and a grip portion (not shown) is attached to the other end of the shaft 18 to form a golf club.

  The head main body 11A is formed by joining a rear member including a sole portion 12, a crown portion 13, a heel portion 15, a neck portion 15A, a toe portion 16 and a back portion 17 and a face member constituting the face portion 14 by welding. It is formed. Here, the rear member has a metal outer shell structure made of a Ti-6Al-4V alloy.

  FIG. 23 is a view showing a face member 14A constituting the face portion 14 in the head main body 11A. FIG. 23 (a) shows a front view and FIG. 23 (b) shows a perspective sectional view.

  Referring to FIGS. 23A and 23B, the face member 14A has a thick portion 14B located at the center thereof, and a thin portion 14C located around the thick portion 14B. A different material 19 is provided inside the thick portion 14B. In the cross section shown in FIG. 23B, the entire circumference of the different material 19 is diffusion-bonded to the face member 14A, and the different material 19 and the face member 14A are in close contact with each other without a gap. As a material constituting the face member 14A, for example, a Ti-5Al-2.5V alloy that is an α-based titanium alloy is used, and as the different material 19, for example, a high-strength β-based titanium alloy is used. Some Ti-15V-3Cr-3Sn-3Al alloys and Ti-15Mo-5Zr-3Al alloys are used.

  24 is a view showing a modification of the face member 14A shown in FIG.

  Referring to FIGS. 24A and 24B, in this modification, a different material 19 is provided from the thick portion 14B at the center of the face member 14A to the thin portion 14C around it.

  FIG. 25 is a perspective view of the wood golf club head 11 according to the eighth embodiment. FIG. 26 is a view showing a face member 14A constituting the face portion 14 in the head main body 11A in FIG.

  The wood golf club head 11 according to the present embodiment is a modification of the wood golf club head 11 according to the seventh embodiment, and basically has the same configuration as the wood golf club head 11 according to the seventh embodiment.

  In the present embodiment, as shown in FIGS. 25 and 26, the face member 14 </ b> A has a flange portion 14 </ b> D that protrudes on the opposite side of the hitting surface. The flange portion 14D and the rear member including the sole portion 12 and the crown portion 13 are abutted to form a club head.

  Also in the above configuration, the different material 19 is provided inside the thick portion 14B. In the cross section shown in FIG. 26B, the entire circumference of the different material 19 is diffusion bonded to the face member 14A, and the different material 19 and the face member 14A are in close contact with each other without a gap.

  FIG. 27 is a view showing a modification of the face member 14A shown in FIG.

  Referring to FIGS. 27A and 27B, in this modification, a different material 19 is provided from the thick portion 14B at the center of the face member 14A to the thin portion 14C around it.

  In the present embodiment, detailed description of matters similar to those in the seventh embodiment will not be repeated.

  Although the embodiments of the present invention and the embodiments have been described above, it is planned from the beginning to appropriately combine the features of the embodiments and the embodiments described above. The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is a rear view of the iron golf club head concerning Example 1 of the present invention. It is a figure which shows an example of the AA cross section in FIG. It is a figure which shows the other example of the AA cross section in FIG. It is a figure which shows the further another example of the AA cross section in FIG. It is a rear view of the iron golf club head which concerns on Example 2 of this invention. It is a figure which shows an example of the BB cross section in FIG. It is a figure which shows the other example of the BB cross section in FIG. It is a rear view of the iron golf club head concerning Example 3 of the present invention. It is a figure which shows CC cross section in FIG. It is a rear view of the iron golf club head which concerns on Example 4 of this invention. It is a figure which shows the DD cross section in FIG. It is a rear view of the iron golf club head which concerns on Example 5 of this invention. It is a figure which shows the EE cross section in FIG. It is a rear view of the iron golf club head which concerns on Example 6 of this invention. It is a figure which shows the FF cross section in FIG. It is the rear view which showed one modification of the iron golf club head which concerns on Examples 1-6 of this invention. It is the rear view which showed the other modification of the iron golf club head which concerns on Examples 1-6 of this invention. It is the rear view which showed the further another modification of the iron golf club head which concerns on Examples 1-6 of this invention. It is the rear view which showed the further another modification of the iron golf club head which concerns on Examples 1-6 of this invention. It is the rear view which showed the further another modification of the iron golf club head which concerns on Examples 1-6 of this invention. It is the rear view which showed the further another modification of the iron golf club head which concerns on Examples 1-6 of this invention. It is the perspective view which showed the wood golf club head based on Example 7 of this invention. It is the figure which showed an example of the face member in the wood golf club head shown in FIG. 22, (a) shows a front view, (b) shows a perspective sectional view. It is the figure which showed the other example of the face member in the wood golf club head shown in FIG. 22, (a) shows a front view, (b) shows a perspective sectional view. It is the perspective view which showed the wood golf club head based on Example 8 of this invention. It is the figure which showed an example of the face member in the wood golf club head shown in FIG. 25, (a) shows a front view, (b) shows a perspective sectional view. It is the figure which showed the other example of the face member in the wood golf club head shown in FIG. 25, (a) shows a front view, (b) shows a perspective sectional view. It is the figure which showed an example of the formation process of the composite material in the manufacturing method of the golf club head which concerns on one embodiment of this invention. It is the figure which showed the other example of the formation process of the composite material in the manufacturing method of the golf club head which concerns on one embodiment of this invention. It is the figure which showed the further another example of the formation process of the composite material in the manufacturing method of the golf club head which concerns on one embodiment of this invention. It is the figure which showed the further another example of the formation process of the composite material in the manufacturing method of the golf club head which concerns on one embodiment of this invention. It is the figure which showed the further another example of the formation process of the composite material in the manufacturing method of the golf club head which concerns on one embodiment of this invention. It is the figure which showed an example of the axial direction cross section of the composite material before a forge process in the manufacturing method of the golf club head which concerns on one embodiment of this invention. It is the figure which showed the other example of the axial direction cross section of the composite material before a forge process in the manufacturing method of the golf club head which concerns on one embodiment of this invention. It is the figure which showed the further another example of the axial direction cross section of the composite material before the forge process in the manufacturing method of the golf club head which concerns on one embodiment of this invention. It is the figure which showed the further another example of the axial direction cross section of the composite material before the forge process in the manufacturing method of the golf club head which concerns on one embodiment of this invention. It is the figure which showed the further another example of the axial direction cross section of the composite material before the forge process in the manufacturing method of the golf club head which concerns on one embodiment of this invention. It is the figure which showed the further another example of the axial direction cross section of the composite material before the forge process in the manufacturing method of the golf club head which concerns on one embodiment of this invention.

Explanation of symbols

  1 Iron golf club head, 1A head body, 1B thick part, 1C thin part, 2,12 sole part, 3 top edge part, 4,14 face part, 5,15 heel part, 5A, 15A neck part, 6, 16 toe portion, 7, 17 back portion, 8, 18 shaft, 9, 9A to 9D, 19 different material, 11 wood golf club head, 13 crown portion, 14A face member, 14B thick portion, 14C thin portion, 14D flange Part, 20, 20A-20H 1st raw material, 21 2nd raw material, 22 Lid, 23A, 23B Spacer, 200,210 Notch part, 200A Protrusion part.

Claims (10)

A body having a face portion, a toe portion and a heel portion;
Positioned behind the central portion of the face portion, and in close contact with the main body in the cross section of the central portion in the toe-heel direction from the toe portion toward the heel portion, and the joint surface on the face portion side with the main body A golf club head comprising: a different material inserted into the main body so as to extend along the face portion.   The golf club head according to claim 1, wherein the main body and the different material are in close contact by diffusion bonding. The golf club head is an iron golf club head;
3. The golf club head according to claim 1, wherein the different material is disposed from a sole portion in the iron golf club head to a rear of a center portion of the face portion. The golf club head is a wood golf club head;
The wood golf club head has a thick part at the center of the face part,
The golf club head according to claim 1, wherein a different material is inserted into the thick part.   In the cross section of the central portion in the toe-heel direction, the different material is disposed behind the face portion over a length of 50% to 90% of the length of the face portion in the direction along the face surface. The golf club head according to any one of claims 1 to 4. Inserting the first material into a second material different from the first material to combine the first and second materials before forging to form a composite material;
A method of manufacturing a golf club head comprising: forging the composite material to deform the first and second materials to form an outer shape of the head. The rod-shaped second material is provided with an axial hole of the second material,
The golf club head manufacturing method according to claim 6, wherein the composite material is formed by inserting a first material into the hole.   After the first material is inserted into the bottom of the hole, a lid made of the same material as the second material is provided on the first material so as to fill the hole, thereby forming the composite material. Item 8. A method for manufacturing a golf club head according to Item 7.   The golf club head manufacturing method according to claim 7 or 8, wherein the composite material is formed by providing a plurality of the first materials in the hole so as to sandwich a spacer made of the same material as the second material. Method.   A golf club comprising the golf club head according to any one of claims 1 to 5 or the golf club head manufactured by the method for manufacturing a golf club head according to any one of claims 6 to 9. .

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