JP3779531B2 - Golf club - Google Patents

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Publication number
JP3779531B2
JP3779531B2 JP2000211151A JP2000211151A JP3779531B2 JP 3779531 B2 JP3779531 B2 JP 3779531B2 JP 2000211151 A JP2000211151 A JP 2000211151A JP 2000211151 A JP2000211151 A JP 2000211151A JP 3779531 B2 JP3779531 B2 JP 3779531B2
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Japan
Prior art keywords
metal plate
golf club
thickness
rolling
cold rolling
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Expired - Fee Related
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JP2000211151A
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Japanese (ja)
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JP2002017910A (en
Inventor
将史 西谷
政衛 鶴巻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Sports Co Ltd
Endo Manufacturing Co Ltd
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Bridgestone Sports Co Ltd
Endo Manufacturing Co Ltd
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Description

【0001】
【発明の属する技術分野】
本発明は、複数個の分割殻を組み合わせて作製した金属製ゴルフクラブヘッドにシャフトを取り付けてなるゴルフクラブに関し、さらに詳述すると、前記分割殻のうちのフェース部を、肉厚の異なる部分を有する金属板により形成したゴルフクラブに関する。
【0002】
【従来の技術】
複数個の分割殻、例えばフェース部、ソール部、クラウン部、サイド部、ホゼル部などを組み合わせて作製した金属製ゴルフクラブヘッドにおいて、分割殻の少なくとも一つを、肉厚の異なる部分を有する金属板により形成したものがある。従来、このような肉厚の異なる部分を有する金属板は鋳造によって作製されている。しかし、肉厚の異なる部分を有する金属板を鋳造によって作製する場合、薄肉部が薄すぎると溶融金属が薄肉部にうまく流れ込まず、その結果金属板の強度が低下することがあった。また、鋳造法では金属が高温になるため、再結晶によって金属の結晶粒が大きくなり、その結果金属板の強度が低下することがあった。
【0003】
一方、チタニウム合金からなる分割殻を組み合わせたゴルフクラブヘッドを作製する場合、肉厚の異なる部分を有する金属板を鋳造によって作製することは難しく、そのため肉厚の異なる部分を有する分割殻は、均等な厚みを有する板材に他の板材を溶接により固定する方法が採られてきた。例えば、ソール部を形成する板材の裏面に、錘となる金属を溶接により固定することなどが行われてきた。そのため、肉厚の異なる部分を有する金属板の作製が煩雑であった。
【0004】
さらに、本発明者らは、金属製のフェース部を薄くするために、ステンレス製の微少球体をフェース面に高速で衝突させ、フェース面を押しつぶす方法(いわゆるショットピーニング法)を試みた。しかし、ショットピーニングを繰り返すと前記微少球体に割れが生じ、この微少球体がフェース面を傷つけるようになった。そのため、ショットピーニングによって、フェース面を硬くする効果、及び、フェース部表面層に残留応力を残して疲労強度を上げる効果を得ようとしたが、フェース面に傷が付くことにより、かえってフェース部の強度を低下させてしまうものであった。
【0005】
【発明が解決しようとする課題】
本発明は、前述した事情に鑑みてなされたもので、複数個の分割殻を組み合わせて作製され、かつ、分割殻のうちのフェース部は肉厚の異なる部分を有する金属板からなる金属製ゴルフクラブヘッドにシャフトを取り付けてなるゴルフクラブであって、前記肉厚の異なる部分を有する金属板は、薄肉部を薄くすることによる強度低下や、再結晶によって金属の結晶粒が大きくなることによる強度低下が生じないとともに、1枚の板材で形成され、そのため溶接によることなく簡単に作製することができるゴルフクラブを提供することを目的とする。
【0006】
【課題を解決するための手段】
本発明は、前記目的を達成するため、複数個の分割殻を組み合わせて作製した金属製ゴルフクラブヘッドにシャフトを取り付けてなるゴルフクラブにおいて、前記分割殻のうちのフェース部は、冷間圧延加工又は温間圧延加工により肉厚の異なる部分を形成したβ型チタニウム合金の金属板からなり、かつ前記金属板の片面において、互いに隣接する薄肉部と厚肉部との間に傾斜部を有することを特徴とするゴルフクラブを提供する。
【0007】
本発明では、冷間圧延加工又は温間圧延加工によって肉厚の異なる部分を有する金属板を作製するので、薄肉部を塑性加工によって形成することができるともに、金属組織が再結晶を起こさない温度範囲で前記金属板を作ることができる。したがって、薄肉部を薄くすることによる金属板の強度低下や、再結晶によって金属の結晶粒が大きくなることによる金属板の強度低下が生じない。また、溶接によることなく、一つの金属板や金属塊から肉厚の異なる部分を有する金属板を容易に作製することができる。
【0008】
【発明の実施の形態】
以下、本発明につきさらに詳しく説明する。本発明のゴルフクラブは、複数個の分割殻を組み合わせて作製したヘッドを用いたものである。この場合、前記分割殻としては、例えば、フェース部、ソール部、クラウン部、サイド部、ホゼル部などを挙げることができる。
【0009】
本発明では、前記分割殻のうちのフェース部は肉厚の異なる部分を有する金属板からなり、かつ、この金属板は冷間圧延加工又は温間圧延加工によって形成されている。この場合、冷間圧延加工又は温間圧延加工においては、例えば、図2の(a)図に示すような凸部2を有する圧延ローラ4を用いて、図2の(b)図に示すような凹部6を有する金属板8を作製することができる。
【0010】
本発明において、肉厚の異なる部分を有する金属板をフェース部に用いることにより、フェース部の強度低下を防ぎつつ、フェース部の反発性を向上させることが可能となる。
【0011】
冷間圧延加工又は温間圧延加工により肉厚の異なる部分を設ける金属板の材質としては、β層を有するチタニウム合金(β型チタニウム合金)を用いる。β型チタニウム合金としては、例えば、Ti−15V−3Cr−3Sn−3Al、Ti−15Mo−5Zr−3Al、Ti−15Mo−5Zr、Ti−22V−4Al、Ti−13V−11Cr−3Al、Ti−11V−2Al−2Sn、Ti−11.5Mo−6Zr−4.5Sn等が挙げられるが、その他のβ型チタニウム合金でもよい。β型チタニウム合金は、圧延加工を行うことが容易であり、また、熱処理後に引張強度が1000Mpa以上となる材料が多く、十分な強度を得やすいため好ましい。
【0012】
また、前記金属板は、2回以上の冷間圧延加工又は温間圧延加工により肉厚の異なる部分を形成してもよい。例えば、温間圧延加工又は冷間圧延加工により金属板全体の厚みを薄くした後、さらに、薄肉にしたい部分に温間圧延加工又は冷間圧延加工を施してもよい。また、β型チタニウム合金は、高温を加えると金属が硬化するため、低温において厚み調整を行うことが好ましい。
【0013】
本発明では、金属板に部分的に冷間圧延加工又は温間圧延加工を施すことにより、該圧延加工によって薄肉部を形成することができる。この場合、金属板の片面のみを圧延用のローラに当てて薄肉化することにより、片面のみに凹凸部を設け、この凹凸部を内面側にする。
【0014】
肉厚の異なる部分を有する金属板の最厚肉部の厚みは1.0〜5.0mmの範囲が好ましく、また、最薄肉部と最厚肉部との肉厚差は0.1mm以上、特に0.3〜1.0mmであることが好ましい。すなわち、冷間圧延加工又は温間圧延加工を施すことにより、金属板の加工部の肉厚を0.1mm以上薄くすることが好ましく、また、加工を複数回繰り返すことにより加工部をさらに薄くして、加工部の肉厚を0.3〜1.0mm薄くすることが最も好ましい。
【0015】
冷間圧延加工又は温間圧延加工によって薄肉部を形成する場合、金属板の厚みや材料により薄肉化する量(金属板の変形量)は異なるが、一度の冷間圧延加工又は温間圧延加工で0.1〜0.5mm程度肉厚を薄くすることが適当である。一度の加工における金属板の変形量をあまり大きくすると、冷間圧延加工又は温間圧延加工が施されて薄肉化された薄肉部分と、冷間圧延加工又は温間圧延加工が施されていない厚肉部分との肉厚差が大きくなり、薄肉部分と厚肉部分との間に亀裂が生じやすくなってしまうためである。
【0016】
本発明では、上述の亀裂を起こしにくくするため、図1に示すように、互いに隣接する薄肉部10と厚肉部12との間に傾斜部14を設ける。すなわち、薄肉部と厚肉部との間に傾斜部を設け、薄肉部から厚肉部にかけて徐々に厚くすることにより、金属板の厚みが急激に変化しないようにし、ボールインパクト時に発生する応力が厚みの変化する部分に集中しないようにする。この傾斜部の角度θは40°〜75°の範囲が好ましい。75°より大きいと金属板の厚みの変化が大きくなって薄肉部と厚肉部との間に前記応力が集中しやすくなり、角度θが40°未満であると薄肉部の面積が小さくなる。
【0017】
【実施例】
次に実施例を示す。本実施例のゴルフクラブヘッドは、β型チタニウム合金であるTi−15Mo−5Zr−3Alの圧延材をフェース部材に用いるとともに、ヘッド本体をα−β型チタニウム合金であるTi−6Al−4Vにより鋳造で成形したもので、ヘッド本体にフェース部材を嵌合固定したものである。
【0018】
前記フェース部材に使用するβ型チタニウム合金からなる金属板は、次のようにして作製した。まず、厚み4.0mmの板材を冷間圧延加工により厚み2.8mmに均一に加工した。その後、コルゲーションを形成するフェース部の表側ではなく反対側になる面に、幅50mmで高さ0.3mmの凸部を有するローラを下側のローラとして取り付け、一方フェース部の表側になる面に、上側の単なる円筒状のローラを取り付けて、前記板材を上下ローラの間に通し、部分的に薄くなるように冷間圧延加工を施した。このとき、前述した薄肉部と厚肉部との間の傾斜部の角度θは60°であった。この傾斜部を形成することにより、薄肉部と厚肉部との間にひび割れが生じることなく、金属板が綺麗に仕上がった。また、図1に示した厚肉部の厚みa、薄肉部の厚みb及び厚み差a−bの値は下記表1に示すとおりであった。なお、実施例1〜3は、同様の加工を3回行ったものである。
【0019】
【表1】

Figure 0003779531
【0020】
ローラの凸部の高さ0.3mmに対し、冷間圧延では0.1mmの段差ができた。また、中間部(薄肉部)が圧下し、中間部面が引き延ばされた影響から、およそ0.1mmほど左右の厚肉部の厚みも薄くなったものである。また、このときの、一度目の冷間圧延を行った部分の引張強度と、さらに冷間圧延を加えた部分の引張強度を表に示す。
【0021】
【表2】
Figure 0003779531
【0022】
上記のようにして作製した板材を、その後のブランギング工程でフェース部の形に打ち抜き、さらにその後のプレス工程で、スコアーライン、バルジ及びローラが付くように油圧プレスにて加工を施し、フェース部材を完成させた。ヘッド本体のフェース開口部に完成したフェース部材を溶接により固着した後、熱処理によって硬化させた。さらに、研磨工程により重量調整を行うとともに、溶接によるビード部を削り落とし、塗装工程を経てゴルフクラブヘッドを完成させた。
【0023】
得られたゴルフクラブヘッドにゴルフシャフト及びグリップを取り付け、ゴルフクラブを完成させた。そして、そのクラブを試打して評価を行った。評価は下記のように行った。ここで、ヘッドスピード及びボール初速は、ブリヂストンスポーツ株式会社製の計測システム「サイエンスアイ」を用い、CCDカメラにより画像データを取り込んで測定を行った。
(ヘッドスピード)
1番ウッド(W1)によりボールをインパクトする直前のヘッドスピードを測定した。
(ボール初速)
1番ウッド(W1)によりボールをインパクトした直後のボール初速を測定した。
(ミート率)
前記ボール初速を前記ヘッドスピードで割った値をミート率とした。
(飛距離)
1番ウッド(W1)によりボールをインパクトした後、ボールが最初に地面に接するまでの直線距離を測定した。
【0024】
また、比較例1としてフェース部材全体を圧延して厚み2.7mmにしたもの、比較例2としてフェース部材を圧延加工しないもの(厚み2.8mm)を用いた。結果を下記表3に示す。
【0025】
【表3】
Figure 0003779531
【0026】
その結果、フェース部に部分的に圧延加工を施して薄肉部を形成することにより、ボールの反発を高める効果を得ることができることがわかった。また、金属板をローラ間に通すだけで薄肉部と厚肉部を作ることができ、肉厚の異なる部分を有する金属板を簡単に作製できることがわかった。さらに、圧延により薄肉した部分と元々の厚みの部分との間に急激な段差が生じず、またこの部分に亀裂も生じず、圧延加工によって強度上問題のない金属板が得られることが確認された。
【0027】
【発明の効果】
以上のように、本発明のゴルフクラブは、複数個の分割殻を組み合わせて作製され、かつ、分割殻のうちのフェース部は肉厚の異なる部分を有する金属板からなる金属製ゴルフクラブヘッドにシャフトを取り付けてなるゴルフクラブであって、前記肉厚の異なる部分を有する金属板の強度が高く、またこの金属板を圧延加工によって簡単に作製できるものである。
【図面の簡単な説明】
【図1】 肉厚の異なる部分を有する金属板の一例を示す断面図である。
【図2】 (a)は圧延ローラの一例を示す正面図、(b)はこの圧延ローラを用いて圧延加工を行った金属板の断面図である。
【符号の説明】
2 凸部
4 圧延ローラ
6 凹部
8 金属板
10 薄肉部
12 厚肉部
14 傾斜部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a golf club in which a shaft is attached to a metal golf club head produced by combining a plurality of divided shells. More specifically, the face portion of the divided shells is formed with portions having different thicknesses. The present invention relates to a golf club formed by a metal plate having the same.
[0002]
[Prior art]
In a metal golf club head manufactured by combining a plurality of divided shells, for example, a face portion, a sole portion, a crown portion, a side portion, a hosel portion, etc., at least one of the divided shells is a metal having a portion having a different thickness. Some are made of plates. Conventionally, the metal plate which has such a part from which thickness differs is produced by casting. However, when metal plates having portions with different thicknesses are produced by casting, if the thin portion is too thin, the molten metal does not flow well into the thin portion, and as a result, the strength of the metal plate may be reduced. Further, since the metal becomes high temperature in the casting method, the crystal grains of the metal are increased by recrystallization, and as a result, the strength of the metal plate may be lowered.
[0003]
On the other hand, when manufacturing a golf club head combining split shells made of a titanium alloy, it is difficult to cast metal plates having different thickness portions by casting, and therefore split shells having different thickness portions are equal. A method has been adopted in which another plate is fixed to a plate having a certain thickness by welding. For example, a metal that becomes a weight has been fixed to the back surface of the plate material forming the sole portion by welding. Therefore, the production of metal plates having portions with different thicknesses is complicated.
[0004]
Furthermore, the present inventors tried a method (so-called shot peening method) in which a fine sphere made of stainless steel collides with the face surface at high speed and the face surface is crushed to make the metal face portion thin. However, when shot peening was repeated, the microspheres cracked, and the microspheres began to damage the face surface. Therefore, shot peening tried to obtain the effect of hardening the face surface and the effect of increasing the fatigue strength by leaving the residual stress on the surface layer of the face part. The strength was lowered.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described circumstances, and is made of a metal golf plate made of a metal plate, which is manufactured by combining a plurality of divided shells, and the face portion of the divided shells has portions having different thicknesses. A golf club in which a shaft is attached to a club head, and the metal plate having a portion with a different thickness is reduced in strength by thinning the thin portion or strength by increasing crystal grains of the metal by recrystallization. It is an object of the present invention to provide a golf club that is not lowered and is formed of a single plate, and can be easily manufactured without welding.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a golf club in which a shaft is attached to a metal golf club head produced by combining a plurality of divided shells, and the face portion of the divided shells is cold-rolled. Or it consists of the metal plate of (beta) -type titanium alloy which formed the part from which thickness differs by warm rolling, and has an inclined part between the thin part and the thick part which adjoin each other in the single side | surface of the said metal plate A golf club is provided.
[0007]
In the present invention, a metal plate having a portion having a different thickness is produced by cold rolling or warm rolling, so that the thin portion can be formed by plastic working and the metal structure does not recrystallize. The metal plate can be made in a range. Therefore, the strength of the metal plate is not reduced by reducing the thickness of the thin portion, and the strength of the metal plate is not reduced by increasing the crystal grains of the metal by recrystallization. Moreover, the metal plate which has a part from which thickness differs from one metal plate or a metal lump can be produced easily, without welding.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail. The golf club of the present invention uses a head manufactured by combining a plurality of divided shells. In this case, examples of the divided shell include a face portion, a sole portion, a crown portion, a side portion, and a hosel portion.
[0009]
In the present invention, the face portion of the divided shell is made of a metal plate having portions having different thicknesses, and the metal plate is formed by cold rolling or warm rolling. In this case, in the cold rolling process or the warm rolling process, for example, using a rolling roller 4 having a convex portion 2 as shown in FIG. 2A, as shown in FIG. 2B. A metal plate 8 having a concave portion 6 can be produced.
[0010]
In the present invention, by Rukoto a metal plate having different portions of the thickness of the face portion, while preventing the reduction in the strength of the face portion, it is possible to improve the resilience of the face portion.
[0011]
A titanium alloy (β-type titanium alloy) having a β layer is used as the material of the metal plate on which the portions having different thicknesses are provided by cold rolling or warm rolling. Examples of the β-type titanium alloy include Ti-15V-3Cr-3Sn-3Al, Ti-15Mo-5Zr-3Al, Ti-15Mo-5Zr, Ti-22V-4Al, Ti-13V-11Cr-3Al, Ti-11V. -2Al-2Sn, Ti-11.5Mo-6Zr-4.5Sn, etc., but other β-type titanium alloys may be used. A β-type titanium alloy is preferable because it can be easily rolled and has a material with a tensile strength of 1000 Mpa or more after heat treatment, and can easily obtain sufficient strength.
[0012]
Further, the metal plate may form portions having different thicknesses by two or more cold rolling processes or warm rolling processes. For example, after reducing the thickness of the entire metal plate by warm rolling or cold rolling, the portion to be thinned may be further subjected to warm rolling or cold rolling. In addition, since the β-type titanium alloy is hardened when a high temperature is applied, the thickness is preferably adjusted at a low temperature.
[0013]
In this invention, a thin part can be formed by this rolling process by giving a cold rolling process or a warm rolling process partially to a metal plate. In this case, by thinning against the roller for rolling only one side of the metal plate, an uneven portion is provided only on one side, you the uneven portion on the inner surface side.
[0014]
The thickness of the thickest part of the metal plate having different thickness parts is preferably in the range of 1.0 to 5.0 mm, and the difference in thickness between the thinnest part and the thickest part is 0.1 mm or more, In particular, the thickness is preferably 0.3 to 1.0 mm. That is, it is preferable to reduce the thickness of the processed portion of the metal plate by 0.1 mm or more by performing a cold rolling process or a warm rolling process, and to further reduce the processed portion by repeating the processing a plurality of times. Thus, it is most preferable to reduce the thickness of the processed part by 0.3 to 1.0 mm.
[0015]
When a thin part is formed by cold rolling or warm rolling, the amount of thinning (the amount of deformation of the metal plate) varies depending on the thickness of the metal plate and the material, but the cold rolling or warm rolling is performed once. It is appropriate to reduce the thickness by about 0.1 to 0.5 mm. If the amount of deformation of the metal plate in one process is too large, the thinned part is thinned by cold rolling or warm rolling, and the thickness is not subjected to cold rolling or warm rolling. This is because the difference in thickness from the meat portion becomes large, and cracks are likely to occur between the thin portion and the thick portion.
[0016]
In the present invention, in order to hardly cause the above crack, as shown in FIG. 1, Ru provided an inclined portion 14 between the thin portion 10 and the thick portion 12 adjacent to each other. In other words, by providing an inclined part between the thin part and the thick part and gradually increasing the thickness from the thin part to the thick part, the thickness of the metal plate is prevented from changing suddenly, and the stress generated during ball impact is reduced. Avoid concentrating on areas where thickness changes. The angle θ of the inclined portion is preferably in the range of 40 ° to 75 °. If the angle is greater than 75 °, the change in the thickness of the metal plate becomes large, and the stress tends to concentrate between the thin portion and the thick portion. If the angle θ is less than 40 °, the area of the thin portion becomes small.
[0017]
【Example】
Next, examples will be described. The golf club head of this example uses a rolled material of Ti-15Mo-5Zr-3Al, which is a β-type titanium alloy, as a face member, and the head body is cast by Ti-6Al-4V, which is an α-β-type titanium alloy. The face member is fitted and fixed to the head body.
[0018]
A metal plate made of β-type titanium alloy used for the face member was produced as follows. First, a plate material having a thickness of 4.0 mm was uniformly processed to a thickness of 2.8 mm by cold rolling. After that, a roller having a convex part with a width of 50 mm and a height of 0.3 mm is attached as a lower roller to the surface that is not the front side of the face part that forms the corrugation, and on the surface that is the front side of the face part. Then, a simple cylindrical roller on the upper side was attached, and the plate material was passed between the upper and lower rollers and cold-rolled so as to be partially thinned. At this time, the angle θ of the inclined portion between the thin portion and the thick portion described above was 60 °. By forming this inclined part, the metal plate was finished neatly without causing cracks between the thin part and the thick part. Moreover, the values of the thickness a of the thick portion, the thickness b of the thin portion and the thickness difference ab shown in FIG. In Examples 1 to 3, similar processing was performed three times.
[0019]
[Table 1]
Figure 0003779531
[0020]
With respect to the height of the convex part of the roller of 0.3 mm, a step of 0.1 mm was formed by cold rolling. Further, the thickness of the left and right thick portions is reduced by about 0.1 mm due to the influence of the intermediate portion (thin wall portion) being rolled down and the intermediate portion surface being stretched. Further, the table shows the tensile strength of the portion subjected to the first cold rolling and the tensile strength of the portion further subjected to cold rolling.
[0021]
[Table 2]
Figure 0003779531
[0022]
The plate material produced as described above is punched into the shape of the face portion in the subsequent blanking process, and further processed in a hydraulic press so that score lines, bulges and rollers are attached in the subsequent pressing process, and the face member is formed. Completed. The completed face member was fixed to the face opening of the head body by welding and then cured by heat treatment. Further, the weight was adjusted by a polishing process, and the bead portion by welding was scraped off, and a golf club head was completed through a painting process.
[0023]
A golf shaft and a grip were attached to the obtained golf club head to complete a golf club. Then, the club was tried and evaluated. Evaluation was performed as follows. Here, the head speed and the initial ball speed were measured by capturing image data with a CCD camera using a measurement system “Science Eye” manufactured by Bridgestone Sports Co., Ltd.
(Head speed)
The head speed just before impacting the ball with No. 1 wood (W1) was measured.
(Ball initial speed)
The initial ball velocity immediately after impacting the ball with No. 1 wood (W1) was measured.
(Meet rate)
A value obtained by dividing the initial ball speed by the head speed was defined as the meat ratio.
(Flying distance)
After impacting the ball with No. 1 wood (W1), the linear distance until the ball first contacted the ground was measured.
[0024]
Further, as Comparative Example 1, the face member was rolled to a thickness of 2.7 mm, and as Comparative Example 2, the face member was not rolled (thickness: 2.8 mm). The results are shown in Table 3 below.
[0025]
[Table 3]
Figure 0003779531
[0026]
As a result, it has been found that the effect of increasing the repulsion of the ball can be obtained by forming the thin part by partially rolling the face part. Further, it was found that a thin-walled portion and a thick-walled portion can be made simply by passing a metal plate between rollers, and a metal plate having portions with different thicknesses can be easily produced. Furthermore, it is confirmed that there is no sharp step between the thinned portion by rolling and the original thickness portion, and there is no crack in this portion, and a metal plate having no problem in strength can be obtained by rolling. It was.
[0027]
【The invention's effect】
As described above, the golf club of the present invention is manufactured by combining a plurality of divided shells, and the face portion of the divided shells is a metal golf club head made of a metal plate having portions having different thicknesses. A golf club having a shaft attached thereto, wherein the metal plate having the different thickness portions has high strength, and the metal plate can be easily produced by rolling.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a metal plate having portions with different thicknesses.
2A is a front view showing an example of a rolling roller, and FIG. 2B is a cross-sectional view of a metal plate that has been rolled using the rolling roller.
[Explanation of symbols]
2 Convex part 4 Rolling roller 6 Concave part 8 Metal plate 10 Thin part 12 Thick part 14 Inclined part

Claims (5)

複数個の分割殻を組み合わせて作製した金属製ゴルフクラブヘッドにシャフトを取り付けてなるゴルフクラブにおいて、前記分割殻のうちのフェース部は、冷間圧延加工又は温間圧延加工により肉厚の異なる部分を形成したβ型チタニウム合金の金属板からなり、かつ前記金属板の片面において、互いに隣接する薄肉部と厚肉部との間に傾斜部を有することを特徴とするゴルフクラブ。In a golf club in which a shaft is attached to a metal golf club head produced by combining a plurality of divided shells, the face portion of the divided shells is a portion having a different thickness due to cold rolling or warm rolling. A golf club comprising: a β-type titanium alloy metal plate formed with a slant portion between a thin portion and a thick portion adjacent to each other on one side of the metal plate. 前記薄肉部及び前記厚肉部の表面はそれぞれ平面状であることを特徴とする請求項1に記載のゴルフクラブ。 2. The golf club according to claim 1, wherein surfaces of the thin portion and the thick portion are flat . 前記金属板の最厚肉部の厚みは1.0〜5.0mmの範囲であり、最薄肉部と最厚肉部との肉厚差は0.3〜1.0mmであることを特徴とする請求項1又は2に記載のゴルフクラブ。       The thickness of the thickest part of the metal plate is in the range of 1.0 to 5.0 mm, and the thickness difference between the thinnest part and the thickest part is 0.3 to 1.0 mm. The golf club according to claim 1 or 2. 冷間圧延加工又は温間圧延加工により肉厚の異なる部分を形成した金属板は、2回以上の冷間圧延加工又は温間圧延加工により肉厚の異なる部分を形成したことを特徴とする請求項1〜3のいずれか1項に記載のゴルフクラブ。       The metal plate in which the portions having different thicknesses are formed by cold rolling or warm rolling, wherein the portions having different thicknesses are formed by cold rolling or warm rolling twice or more. Item 4. The golf club according to any one of Items 1 to 3. 冷間圧延加工又は温間圧延加工により肉厚の異なる部分を形成した金属板は、温間圧延加工又は冷間圧延加工により金属板全体の厚みを薄くした後、部分的に温間圧延加工又は冷間圧延加工を施して肉厚の異なる部分を形成したことを特徴とする請求項4に記載のゴルフクラブ。       A metal plate in which a part having a different thickness is formed by cold rolling or warm rolling, and after the thickness of the entire metal plate is reduced by warm rolling or cold rolling, The golf club according to claim 4, wherein portions having different thicknesses are formed by performing cold rolling.
JP2000211151A 2000-07-12 2000-07-12 Golf club Expired - Fee Related JP3779531B2 (en)

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US8235844B2 (en) 2010-06-01 2012-08-07 Adams Golf Ip, Lp Hollow golf club head
US9943734B2 (en) 2004-11-08 2018-04-17 Taylor Made Golf Company, Inc. Golf club
JP4500296B2 (en) * 2006-10-19 2010-07-14 Sriスポーツ株式会社 Wood type golf club head
US7753806B2 (en) 2007-12-31 2010-07-13 Taylor Made Golf Company, Inc. Golf club
US8206244B2 (en) 2008-01-10 2012-06-26 Adams Golf Ip, Lp Fairway wood type golf club
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US8821312B2 (en) 2010-06-01 2014-09-02 Taylor Made Golf Company, Inc. Golf club head having a stress reducing feature with aperture
US9707457B2 (en) 2010-12-28 2017-07-18 Taylor Made Golf Company, Inc. Golf club
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