JP2022108923A - Method for manufacturing soft-iron forged golf club head - Google Patents

Method for manufacturing soft-iron forged golf club head Download PDF

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JP2022108923A
JP2022108923A JP2021004156A JP2021004156A JP2022108923A JP 2022108923 A JP2022108923 A JP 2022108923A JP 2021004156 A JP2021004156 A JP 2021004156A JP 2021004156 A JP2021004156 A JP 2021004156A JP 2022108923 A JP2022108923 A JP 2022108923A
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基宏 蘇
ji-hong Su
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Abstract

To provide a method for manufacturing a soft-iron forged golf club head capable of suppressing deformation and wear of an iron head and a wedge head made of a soft-iron material and maintaining good hitting performance.SOLUTION: A method for manufacturing a soft-iron forged golf club head comprises the steps of: forming a semi-finished club head in a predetermined shape from a low-hardness iron-based material, and forming a recess in the semi-finished club head; forming, from a high-hardness iron-based material, a reinforcing member in a shape that matches a shape of the recess formed in the semi-finished club head; weld-joining the semi-finished club head and the reinforcing member, by fitting the reinforcing member into the recess in the semi-finished club head and weld-joining them into one piece; and forming a finished club head by co-forging in which the reinforcing member and the weld-joined semi-finished integrated through weld-joining are placed together into a forging mold and forged at least once.SELECTED DRAWING: Figure 1

Description

本発明は、ゴルフクラブヘッドの製造方法に関し、特に軟鉄鍛造製のゴルフアイアン(iron)クラブヘッドあるいはウェッジ(wedge)クラブヘッドの製造方法に関するものである。 The present invention relates to a method of manufacturing a golf club head, and more particularly to a method of manufacturing a soft iron forged golf iron or wedge club head.

アイアンクラブやウェッジクラブでの打球時の柔らかい打球感、優れたコントロール性、及び良好な打球音を得るために、低硬度の軟鉄材料を利用して、アイアンヘッドやウェッジヘッドを製作することが多い。その軟鉄材料について、米国金属材料記号SAE 1020C、SAE 1025C、SAE 1030C、SAE 1035Cなどの低炭素鋼材を使うのが一般的である。 Iron heads and wedge heads are often manufactured using low-hardness soft iron materials in order to obtain a soft hitting feel, excellent controllability, and a good hitting sound when hitting a ball with an iron club or wedge club. For the soft iron material, it is common to use low-carbon steel materials such as US metal material symbols SAE 1020C, SAE 1025C, SAE 1030C, and SAE 1035C.

上述した軟鉄材料からなるアイアンヘッドやウェッジヘッドの材料硬度が低く、大体HRB70~HRB90の範囲であることから、ユーザーはゴルフをする時、クラブを持ち運ぶ際に、クラブヘッドが当たってしまい、損傷を受けたり、外観に永久的な傷を付けたり、また、複数回の打球衝突によって、磨耗や変形しやすく、ヘッドの表面が凹んでしまう虞があり、これにより、打球方向性のコントロールや、ボールを捉える精度に影響を与え、また、打撃面のフェイスラインも減り込みやすいことから、打球時にボールに与えるスピン量(spin)にも影響を及ぼすので、ボールの飛ぶ距離と方向性の低下に繋がり、それに加え、ヘッドのソール部(sole)も消耗しやすいことから、ソールバンス角(sol bounce angle)が潰れやすいので、ボールの弾道角度や、打球の高さ、飛ぶ距離に影響を与えてしまう。 Since the hardness of the iron head and wedge head made of the above-mentioned soft iron material is low, generally in the range of HRB70 to HRB90, when the user carries the club while playing golf, the club head may hit and be damaged. In addition, the surface of the head may be dented due to wear and deformation due to multiple impacts, which may affect the control of the direction of the ball and the movement of the ball. In addition, the face line of the hitting surface tends to be reduced, which affects the amount of spin (spin) given to the ball at the time of hitting, leading to a decrease in the flight distance and directionality of the ball. In addition, since the sole of the head is also easily worn, the sol bounce angle is easily crushed, which affects the trajectory angle of the ball, the height of the ball, and the flight distance.

台湾特許第I469808号公報Taiwan Patent No. I469808

本発明は、前記の従来技術の欠点に鑑みてなされたものであり、軟鉄材料からなるアイアンヘッドやウェッジヘッドの変形や消耗を抑えると共に、良好な打球性能を維持できる、軟鉄鍛造製ゴルフクラブヘッド製造方法を提供することを目的としている。 SUMMARY OF THE INVENTION The present invention has been made in view of the drawbacks of the prior art described above, and manufactures a forged soft iron golf club head capable of suppressing deformation and wear of iron heads and wedge heads made of soft iron material and maintaining good hitting performance. We aim to provide a method.

上記目的を達成するために、本発明に係る軟鉄鍛造製ゴルフクラブヘッド製造方法は、クラブヘッド半製品を成形する工程と、補強部材を成形する工程と、クラブヘッド半製品と補強部材とを溶着接合する工程と、共鍛造によりクラブヘッド完成品を成形する工程とを含み、
前記クラブヘッド半製品を成形する工程において、ロックウェル硬度試験における硬度規格HRB50以上、HRB105以下の範囲である低硬度鉄系材料を、所定形状のクラブヘッド半製品に形成し、さらに、所定形状に形成したクラブヘッド半製品上の補強予定部位において凹槽を形成し、
前記補強部材を成形する工程において、ロックウェル硬度試験における硬度規格HRC15以上、HRC55以下の範囲である高硬度鉄系材料を、所定形状の補強部材に形成し、該補強部材の形状は、前記クラブヘッド半製品上の補強予定部位に形成された凹槽の形状と一致し、
前記クラブヘッド半製品と補強部材とを溶着接合する工程において、前記補強部材を、対応する前記クラブヘッド半製品上の凹槽に嵌め込み、さらに、該補強部材とクラブヘッド半製品の凹槽の周壁との間の結合部位を、溶接手段により全体的に一体接合し、
前記共鍛造によりクラブヘッド完成品を成形する工程において、一体に溶着接合された前記補強部材とクラブヘッド半製品を一緒に鍛造金型に入れ、700℃~1100℃の温度範囲で加熱し、少なくとも一回の鍛造加工を施し、その結果、該補強部材とクラブヘッド半製品は、熱間鍛造により共晶接合されると共に、所定形状のアイアンヘッドの完成品に成形されることを特徴とする。
In order to achieve the above object, a method for manufacturing a soft iron forged golf club head according to the present invention comprises steps of forming a semi-finished club head, forming a reinforcing member, and welding the semi-finished club head and the reinforcing member. joining and forming a finished club head by co-forging;
In the step of molding the semi-finished club head, a low-hardness iron-based material having a hardness standard of HRB 50 or more and HRB 105 or less in the Rockwell hardness test is formed into a semi-finished club head having a predetermined shape, and further formed into a predetermined shape. forming a recessed groove in a portion to be reinforced on the semi-finished product of the formed club head;
In the step of forming the reinforcing member, a high-hardness iron-based material having a hardness standard of HRC 15 or more and HRC 55 or less in the Rockwell hardness test is formed into a reinforcing member having a predetermined shape, and the shape of the reinforcing member is the same as that of the club. Matches the shape of the groove formed in the portion to be reinforced on the head half-finished product,
In the step of welding and joining the semi-finished club head and the reinforcing member, the reinforcing member is fitted into the corresponding recess on the semi-finished club head, and the peripheral wall of the recess is formed between the semi-finished club head and the semi-finished club head. The joint part between is integrally joined by welding means as a whole,
In the step of forming the finished club head product by co-forging, the reinforcing member and the semi-finished club head welded together are placed together in a forging die, heated at a temperature in the range of 700° C. to 1100° C., and at least A single forging process is performed, and as a result, the reinforcing member and the semi-finished club head are eutectic bonded by hot forging and formed into a finished iron head having a predetermined shape.

前記クラブヘッド半製品と補強部材とを溶着接合する工程においては、前記補強部材とクラブヘッド半製品の凹槽の周壁との間の結合部位を溶接手段により全体的に一体接合した後、該補強部材とクラブヘッド半製品との溶接部位にサンドブラストをかけるようにして、溶接時に生じた高温によって生成された酸化物を落とし、さらに、溶着接合された補強部材とクラブヘッド半製品との溶接部位に表面研磨を施すようにして、溶接時に生じた過剰なスラグを除去することにより、鍛造成形されたクラブヘッド完成品の品質を確保する。 In the step of welding and joining the semi-finished club head and the reinforcing member, the joining portion between the reinforcing member and the peripheral wall of the recess of the semi-finished club head is integrally joined by welding means, and then the reinforcing member is welded. Sandblasting is applied to the welded portion between the member and the semi-finished club head to remove oxides generated by the high temperature generated during welding, and further, the welded portion between the welded reinforcing member and the semi-finished club head is sandblasted. Excess slag generated during welding is removed in a manner similar to surface polishing to ensure the quality of the finished forged club head.

本発明に係る軟鉄鍛造製ゴルフクラブヘッド製造方法はさらに、異なるクラブヘッドの設計要件に応じて、クラブヘッド半製品の凹槽の深さを変えることができ、これに対して、補強部材の高さは、凹槽の深さに応じて適切に変更することができる。このような設計により、硬さの異なるクラブヘッド半製品と補強部材が、溶着接合工程及び高温高圧での鍛造加工を経て出来上がったクラブヘッド完成品において、異材接合されたクラブヘッド半製品と補強部材との間に、より良い融合状態を達成することができ、それに加え、低硬度鉄系材料のヘッド本体と高硬度鉄系材料の補強部材が適切な位置に配置されていることから、柔らかい打球感、良好な打球音、優れたコントロール性、及び打球性能を兼ね備えることが可能となる。 The soft iron forged golf club head manufacturing method according to the present invention can also change the depth of the recess of the semi-finished club head according to the design requirements of different club heads, while the height of the reinforcing member can be changed. The depth can be appropriately changed according to the depth of the recess. With such a design, the half-finished club head and the reinforcing member with different hardness are welded together and the forging process is performed at high temperature and high pressure to form the finished club head. In addition, the low-hardness iron-based head body and the high-hardness iron-based reinforcing member are placed in appropriate positions, resulting in a soft hitting ball. It is possible to combine feel, good hitting sound, excellent controllability, and hitting performance.

上記の技術手段によれば、本発明に係る軟鉄鍛造製ゴルフクラブヘッド製造方法は、少なくとも以下に示す優れた点と効果を有する。
1、本発明の製造方法によれば、軟鉄鍛造製のゴルフアイアンヘッドにおけるよく破損する補強予定部位に、高硬度材料からなる補強部材を設置することにより、持ち運ぶ際の衝撃による外観の永久的な損傷を低減し、かつクラブヘッドの補強予定部位の硬度が高いので、打球衝突による摩耗や変形を抑えることができ、これにより、本発明の製造方法によって作られたアイアンヘッドやウェッジヘッドは、従来の単なる軟鉄で作られたクラブヘッドと比べると、使用寿命が延びている。
2、本発明の製造方法において、硬さの異なるクラブヘッド半製品と補強部材とを溶着接合し、その後、高温高圧での鍛造加工を経て、クラブヘッド完成品が出来上がり、このような、異材接合されたクラブヘッド半製品と補強部材に、両者の間の結合部位全部を溶接して固着させる工程を施すことで、互いに材質成分の異なる金属部品同士を一体化した金属構造体とし、さらに、共鍛造加工を経て、確実に共晶接合して、完全に一体化した金属構造体になるので、最終的な鍛造成形されたクラブヘッド完成品の外観が一体感を呈する。一方で、当該クラブヘッド完成品の主体部分のほとんどは、元の低硬度鉄系材料からなるので、ただ一部の特定の補強予定部分だけに、高硬度鉄系材料を入れ替えることで、軟鉄鍛造製のクラブヘッド本来の柔らかい打球感、優れたコントロール性、及び良好な打球音をそのまま維持することができる。
3、上述のように、本発明のクラブヘッド半製品と補強部材とを溶着接合する工程において、クラブヘッド半製品と補強部材との間の結合部位全部を溶接して固着する工程を施したことで、互いに異なる材質成分の金属部品同士を隙間なく一体的な金属構造体とし、その後、高温高圧での共鍛造によりクラブヘッド完成品を成形する工程を経て行われ、その結果、鍛造成形加工中に補強部材とクラブヘッド半製品との間にずれが生じる問題を効果的に防止できるので、補強部位の正確性を確保でき、同時に、最終的な鍛造成形されたクラブヘッド完成品の外観には、溶接痕などの損傷が付かず、完成度の高い一体感を呈することができる。
4、軟鉄鍛造製のアイアンクラブヘッドにおける損傷しやすいと予想される補強予定部位は、打撃面部やソール部と設定される場合、高硬度の補強部材を打撃面部及びソール部として利用され、さらに、その表面にフェイスラインを入れることで、打撃面部及びソール部としての補強部材の耐摩耗性を向上させることができ、これにより、フェイスラインや設計されたソールバンス角などを長時間にわたり維持することができるので、打球の精度を長く維持することができる。
According to the above technical means, the method for manufacturing a soft iron forged golf club head according to the present invention has at least the following advantages and effects.
1. According to the manufacturing method of the present invention, a reinforcing member made of a high-hardness material is installed at a portion of a soft-iron forged golf iron head to be reinforced that is frequently damaged, thereby preventing permanent damage to the appearance due to impact during transportation. and the hardness of the parts to be reinforced of the club head is high, so wear and deformation due to impact with a hitting ball can be suppressed. Longer service life compared to club heads made from soft iron.
2. In the manufacturing method of the present invention, the club head half-finished product and the reinforcing member having different hardnesses are welded and joined, and then the finished club head is completed through forging at high temperature and high pressure. By performing a process of welding and fixing all joints between the half-finished club head and the reinforcing member, the metal parts having different material components are integrated to form a metal structure, The forging process is followed by a positive eutectic bond resulting in a fully integrated metal structure that provides a uniform appearance to the final forged finished club head. On the other hand, most of the main portion of the finished club head is made of the original low-hardness iron-based material. It is possible to maintain the original soft hitting feel, excellent controllability, and good hitting sound of the original club head.
3. As described above, in the step of welding and joining the semi-finished club head and the reinforcing member according to the present invention, the step of welding and fixing all the connecting portions between the semi-finished club head and the reinforcing member is performed. Then, metal parts with different material components are made into an integral metal structure without gaps, and then the finished club head is formed by co-forging at high temperature and high pressure. This can effectively prevent the problem of misalignment between the reinforcing member and the semi-finished club head, thus ensuring the accuracy of the reinforcing part, and at the same time improving the appearance of the final forged finished club head. , There is no damage such as welding marks, and a sense of unity with a high degree of perfection can be presented.
4. When the planned reinforcing parts expected to be easily damaged in the iron club head made of forged soft iron are set as the hitting face part and the sole part, a high-hardness reinforcing member is used as the hitting face part and the sole part, and further, By putting a face line on the surface, the wear resistance of the reinforcing member as the hitting surface and the sole can be improved, thereby maintaining the face line and the designed sole bounce angle for a long time. Therefore, the accuracy of hitting can be maintained for a long time.

本発明に係る軟鉄鍛造製ゴルフクラブヘッド製造方法のフローチャートである。1 is a flow chart of a method for manufacturing a soft iron forged golf club head according to the present invention. 図1に示した軟鉄鍛造製ゴルフクラブヘッド製造方法におけるクラブヘッド半製品を成形する工程の好適な実施態様を示す模式図である。FIG. 2 is a schematic diagram showing a preferred embodiment of a step of forming a semi-finished club head in the method of manufacturing the forged soft iron golf club head shown in FIG. 1; 図2に示した、鍛造成形されたアイアンヘッドプリフォームに、機械加工により、凹槽を形成する模式図である。FIG. 3 is a schematic diagram of forming a concave trough in the forged iron head preform shown in FIG. 2 by machining. 本発明に係る軟鉄鍛造製ゴルフクラブヘッド製造方法において、予めに形成されたクラブヘッド半製品と、予めに形成された補強部材とを接合する前の状態を示す模式図である。FIG. 4 is a schematic view showing a state before bonding a previously formed semi-finished club head and a previously formed reinforcing member in the method for manufacturing a forged soft iron golf club head according to the present invention; 本発明に係る軟鉄鍛造製ゴルフクラブヘッド製造方法において、予めに形成されたクラブヘッド半製品と、予めに形成された補強部材とを溶着接合した実施形態を示す模式図である。FIG. 2 is a schematic view showing an embodiment in which a preformed club head semifinished product and a preformed reinforcing member are welded and joined in the method for manufacturing a forged soft iron golf club head according to the present invention; 図5に示した、溶着接合されたクラブヘッド半製品と補強部材の側面視断面図である。FIG. 6 is a side cross-sectional view of the welded club head semifinished product and reinforcing member shown in FIG. 5 ; 本発明に係る軟鉄鍛造製ゴルフクラブヘッド製造方法において、予めに形成されたクラブヘッド半製品と、予めに形成された補強部材とを溶着接合した他の実施形態を示す模式図である。FIG. 5 is a schematic view showing another embodiment in which a preformed semi-finished club head and a preformed reinforcing member are welded and joined in the method for manufacturing a forged soft iron golf club head according to the present invention. 図7に示した、溶着接合されたクラブヘッド半製品と補強部材の側面視断面図である。FIG. 8 is a side cross-sectional view of the welded club head semifinished product and reinforcing member shown in FIG. 7 ; 本発明に係る軟鉄鍛造製ゴルフクラブヘッド製造方法において、予めに形成されたクラブヘッド半製品と、予めに形成された補強部材とを溶着接合した更に他の実施形態を示す側面視断面図である。FIG. 10 is a side cross-sectional view showing still another embodiment in which a preformed club head semifinished product and a preformed reinforcing member are welded and joined in the method for manufacturing a forged soft iron golf club head according to the present invention; .

本発明は、軟鉄鍛造製ゴルフクラブヘッド製造方法を提案しており、当該軟鉄鍛造製ゴルフアイアンヘッドは少なくとも、アイアン(iron)クラブヘッドとウェッジ(wedge)クラブヘッドに適用することができる。図1に示したフローチャートのように、前記軟鉄鍛造製ゴルフクラブヘッド製造方法は、クラブヘッド半製品を成形する工程と、補強部材を成形する工程と、クラブヘッド半製品と補強部材とを溶着接合する工程と、共鍛造(Co-Forging)によりクラブヘッド完成品を成形する工程を含む。以下にて、上記各工程について、例示された図面を参照しながら詳説する。 The present invention proposes a soft iron forged golf club head manufacturing method, and the soft iron forged golf iron head can be applied to at least an iron club head and a wedge club head. As shown in the flow chart of FIG. 1, the soft iron forged golf club head manufacturing method includes the steps of forming a semi-finished club head, forming a reinforcing member, and welding and joining the semi-finished club head and the reinforcing member. and forming the finished club head by co-forging. Each of the above steps will be described in detail below with reference to the illustrated drawings.

前記クラブヘッド半製品を成形する工程において、ロックウェル硬度試験(Rockwell hardness test)における硬度規格HRB50以上、HRB105以下の範囲である低硬度鉄系材料を、所定形状のクラブヘッド半製品に形成し、さらに、図5~図9に示すように、所定形状に形成したクラブヘッド半製品20上における補強予定部位に凹槽21、21A、21Bを形成する。前記補強予定部位が、クラブヘッドの設計要件により位置決めされており、詳しく述べると、該補強予定部位が、クラブヘッドの刃部(blade)、背後部(back)、打撃面部(face)、及びソール部(sole)の少なくとも一つ又は複数の部位であってもよく、また、該補強予定部位は、クラブヘッドの刃部(blade)、背後部(back)、打撃面部(face)、及びソール部(sole)などの各部位の局部または全体を占めてもよい。図5は、前記凹槽21が形成された補強予定部位が、打撃面部全体を占める態様を示すものである。図7は、前記凹槽21が形成された補強予定部位が、打撃面部の局部を占める態様を示すものである。図9は、前記凹槽21、21A、21Bが形成された補強予定部位が、打撃面部、背後部及びソール部である態様を示すものである。 In the step of molding the semi-finished club head, a low-hardness iron-based material having a hardness standard of HRB 50 or more and HRB 105 or less in the Rockwell hardness test is formed into a semi-finished club head having a predetermined shape, Further, as shown in FIGS. 5 to 9, grooves 21, 21A, and 21B are formed in areas to be reinforced on the club head half-finished product 20 formed into a predetermined shape. The portion to be reinforced is positioned according to the design requirements of the club head. It may be at least one or a plurality of parts of the sole, and the parts to be reinforced are the blade, the back, the hitting face, and the sole of the club head. (sole) may occupy a part of each site or the whole. FIG. 5 shows a state in which the portion to be reinforced in which the recess 21 is formed occupies the entire striking surface portion. FIG. 7 shows a state in which the portion to be reinforced in which the recess 21 is formed occupies a local portion of the striking face portion. FIG. 9 shows a mode in which the portions to be reinforced in which the recesses 21, 21A, and 21B are formed are the hitting surface portion, the back portion, and the sole portion.

前記クラブヘッド半製品は、炭素含有量が0.5%以下の低炭素鋼材或いは中炭素鋼材を使用し、例えば、米国金属材料記号SAE 1020C、SAE 1025C、SAE 1030C、SAE 1035Cなどの低炭素鋼材や、SAE 1040Cなどの中炭素鋼材、SAE 8620ニッケル―クロム―モリブデン合金鋼材、またはニッケル(Ni)、クロム(Cr)、マンガン(Mn)などの微量金属元素を含むその他の低炭素合金鋼材などを使用する。 The club head semi-finished product uses low carbon steel or medium carbon steel with a carbon content of 0.5% or less, for example, low carbon steel such as US metal material symbol SAE 1020C, SAE 1025C, SAE 1030C, SAE 1035C. , medium carbon steel such as SAE 1040C, SAE 8620 nickel-chromium-molybdenum alloy steel, or other low carbon alloy steel containing trace metal elements such as nickel (Ni), chromium (Cr), manganese (Mn), etc. use.

図2に示すように、前記クラブヘッド半製品を成形する工程の好適な実施形態においては、まず、低硬度鉄系材料(軟鉄材料)の棒材10を折り曲げ、次に、鍛造加工手段で予備成型し、さらに鍛造加工手段でクラブヘッドプリフォーム200を形成する。図3に示すように、鍛造加工手段を経て、クラブヘッドプリフォーム200を所望の形状に形成した後、機械加工により、凹槽21を有するクラブヘッド半製品20を形成する。尚、前記クラブヘッド半製品20の補強予定部位に形成する凹槽が、特定の鍛造金型を利用して、鍛造加工手段で予備成型すると同時に成形してもよい。 As shown in FIG. 2, in a preferred embodiment of the process of forming the club head semi-finished product, first, a bar 10 made of a low-hardness ferrous material (soft iron material) is bent, and then a preliminary forging is performed by forging means. After molding, the club head preform 200 is formed by forging means. As shown in FIG. 3, after a club head preform 200 is formed into a desired shape by forging, a club head half-finished product 20 having a recess 21 is formed by machining. The groove formed in the portion to be reinforced of the semi-finished club head 20 may be formed at the same time as being preformed by forging means using a specific forging die.

前記クラブヘッド半製品を成形する工程において、図6、図8及び図9に示すように、前記凹槽21の深さを、0.2mm~5.0mmの範囲にすることが好ましい。詳しく述べると、前記凹槽21、21A、21Bの深さは、異なる前記クラブヘッド半製品20上の補強予定部位の設計要件に応じて調整することができる。具体的には、図6及び図9に示すように、前記凹槽21の深さは、該凹槽21の各部位に渡って一致してもよく、または、該凹槽21の各部位に渡って変化してもよく、例えば、図8に示した、該凹槽21の周囲部分の深さは、該凹槽21の中央区域の深さよりも浅い実施形態であってもよい。 In the step of molding the semifinished club head, as shown in FIGS. 6, 8 and 9, it is preferable to set the depth of the recess 21 in the range of 0.2 mm to 5.0 mm. Specifically, the depths of the recesses 21 , 21 A, 21 B can be adjusted according to the design requirements of different areas to be reinforced on the semi-finished club head 20 . Specifically, as shown in FIGS. 6 and 9, the depth of the recess 21 may be the same over each portion of the recess 21, or may be the same for each portion of the recess 21. It may also vary across, for example the depth of the peripheral portion of the recess 21 shown in FIG.

前記補強部材を成形する工程において、ロックウェル硬度試験(Rockwell hardness test)における硬度規格HRC15以上、HRC55以下の範囲である高硬度鉄系材料を、所定形状の補強部材に形成し、図4~図9に示すように、該補強部材30、30A、30Bの形状は、前記クラブヘッド半製品20上の補強予定部位に形成された凹槽21、21A、21Bの形状とは一致し、かつ該補強部材30、30A、30Bの硬度は、該クラブヘッド半製品20の硬度よりも高い。 In the step of molding the reinforcing member, a high-hardness iron-based material having a hardness standard of HRC 15 or more and HRC 55 or less in the Rockwell hardness test is formed into a reinforcing member having a predetermined shape, and the reinforcing member is formed as shown in FIGS. 9, the shapes of the reinforcing members 30, 30A, and 30B match the shapes of the grooves 21, 21A, and 21B formed in the portions to be reinforced on the semifinished club head 20. The hardness of members 30 , 30 A, 30 B is higher than the hardness of semifinished club head 20 .

前記補強部材を成形する工程において、前記補強部材に利用される高硬度鉄系材料は、硬度規格HRC20以上、HRC50以下の範囲での中炭素鋼材或いは高炭素鋼材を使用することができる。例えば、米国金属材料記号SAE 1045C、SAE 1050C、SAE 1055C、SAE 1060Cなどの炭素鋼材或いは硬度規格HRC20以上、HRC50以下の範囲で、炭素含有量が0.3%~0.6%の他の合金元素を含む合金鋼材を利用することもできる。例えば、米国金属材料記号SAE 4130クロムモリブデン(CrMo)合金鋼、SAE 4140クロムモリブデン合金鋼、SAE 4340クロムモリブデン合金鋼或いは硬度規格HRC20以上、HRC50以下の範囲でのステンレス鋼を利用することもできる。例えば、マルテンサイト系ステンレス鋼(SUS630)或いはマルエージング鋼(Maraging steel)などを利用することもできる。 In the step of forming the reinforcing member, the high-hardness iron-based material used for the reinforcing member may be medium-carbon steel or high-carbon steel with a hardness standard in the range of HRC20 or more and HRC50 or less. For example, carbon steel materials such as US metal material symbols SAE 1045C, SAE 1050C, SAE 1055C, SAE 1060C, or other alloys with a carbon content of 0.3% to 0.6% within the range of hardness standards HRC20 or more and HRC50 or less Alloy steel materials containing elements can also be used. For example, American metal material symbol SAE 4130 chromium molybdenum (CrMo) alloy steel, SAE 4140 chromium molybdenum alloy steel, SAE 4340 chromium molybdenum alloy steel, or stainless steel with a hardness standard of HRC20 or more and HRC50 or less can be used. For example, martensitic stainless steel (SUS630) or maraging steel can be used.

前記クラブヘッド半製品と補強部材とを溶着接合する工程において、図4~図9に示すように、予めに形成された前記補強部材30を、予めに形成された前記クラブヘッド半製品20上の凹槽21に嵌め込み、さらに、該補強部材30とクラブヘッド半製品20の凹槽21の周壁との間の結合部位を、溶接手段によって全体的に一体接合する。詳しく述べると、前述した、前記補強部材30とクラブヘッド半製品20の凹槽21の周壁との間の結合部位を、溶接手段によって全体的に一体接合することとは、該補強部材30の裏表面及び外周側面と、該クラブヘッド半製品20の凹槽21の周壁に対応して接合する部位を全面的に溶接して固着させ、その結果、該補強部材30とクラブヘッド半製品20との接合部位に隙間が生じることを避け、かつ異材接合された補強部材30とクラブヘッド半製品20との接合部位の接合安定性を確保する。尚、上述した溶接手段は、前記補強部材30及びクラブヘッド半製品20に使われる材料に応じて、溶接加熱温度を調整することができる。本発明の好適な実施例において、当該溶接手段の溶接加熱温度は、1700℃~2500℃の温度範囲に設定される。また、前記溶接手段は、アルゴンアーク溶接や、プラズマ溶接、あるいはレーザ溶接方法などを利用することができる。 In the step of welding and joining the club head half-finished product and the reinforcing member, as shown in FIGS. The semi-finished club head 20 is fitted into the groove 21, and the joining portion between the reinforcing member 30 and the peripheral wall of the groove 21 of the half-finished club head 20 is integrally joined by welding means. More specifically, the above-mentioned integral joining of the joining portion between the reinforcing member 30 and the peripheral wall of the recess 21 of the semi-finished club head 20 by welding means means that the back of the reinforcing member 30 is joined. The front surface and the outer peripheral side face and the part to be joined corresponding to the peripheral wall of the recess 21 of the club head half-finished product 20 are welded all over and fixed, and as a result, the reinforcing member 30 and the club head half-finished product 20 are bonded together. To avoid the formation of a gap in the joint portion and to ensure the joint stability of the joint portion between the reinforcing member 30 and the club head half-finished product 20 which are joined with dissimilar materials. It should be noted that the welding means described above can adjust the welding heating temperature according to the materials used for the reinforcing member 30 and the semi-finished club head 20 . In a preferred embodiment of the present invention, the welding heating temperature of the welding means is set in the temperature range of 1700.degree. C. to 2500.degree. Argon arc welding, plasma welding, laser welding, or the like can be used as the welding means.

前記クラブヘッド半製品と補強部材とを溶着接合する工程において、前記補強部材とクラブヘッド半製品の凹槽の周壁との間の結合部位を溶接手段によって全体的に一体接合した後、該補強部材とクラブヘッド半製品との溶接部位にサンドブラストをかけ、これで、溶接時に生じた高温によって生成された酸化物を落とし、さらに、溶着接合された補強部材とクラブヘッド半製品との溶接部位に、表面研磨を施し、これで、溶接時に生じた過剰なスラグを除去する。 In the step of welding and joining the semi-finished club head and the reinforcing member, the joining portion between the semi-finished club head and the peripheral wall of the recess of the semi-finished club head is integrally joined by welding means, and then the reinforcing member. and the semi-finished club head are sandblasted to remove the oxides produced by the high temperature generated during welding, A surface polish is applied to remove excess slag created during welding.

上述した共鍛造(Co-Forging)によりクラブヘッド完成品を成形する工程において、一体に溶着接合された前記補強部材とクラブヘッド半製品を一緒に鍛造金型に入れ、700℃~1100℃の温度範囲で加熱し、少なくとも一回の鍛造加工を施し、その結果、一緒に鍛造金型に入っている当該補強部材とクラブヘッド半製品とを、高温高圧で共鍛造加工することにより共晶接合させて、所定形状のアイアンヘッドの完成品に成形する。当該クラブヘッド半製品と補強部材との間で鍛造加工を行った後、二つの異なる金属材料を共晶化させるように融合一体化して、金属組織を緊密に結合しているので、ヘッド完成品は、溶接による表面傷や溶接痕が現れることなく、一体感を待った外観となる。 In the step of forming the finished club head by Co-Forging described above, the reinforcing member and the semi-finished club head welded together are placed together in a forging die and heated to 700°C to 1100°C. and at least one forging operation, so that the reinforcing member and the semi-finished club head, which are together in the forging die, are co-forged at high temperature and high pressure to form a eutectic bond. to form a finished iron head having a predetermined shape. After the semi-finished club head and the reinforcing member are forged, the two different metal materials are eutectically fused and integrated to tightly bond the metal structure, so the finished head , there is no surface scratches or welding marks due to welding, and the appearance is a unity.

前記共鍛造によりアイアンヘッド完成品を成形する工程において、鍛造加工の回数は、加工要件や、補強部材が溶着接合されたクラブヘッド半製品における材料の性能要件に応じて設定することができる。理論的には、鍛造加工の回数が多いほど、溶着接合されたクラブヘッド半製品の金属材料と補強部材の金属材料との間の共晶接合が緊密になり、両者の金属材料の金属微細組織がより緻密になる。 In the process of forming the finished iron head by co-forging, the number of times of forging can be set according to the processing requirements and the material performance requirements of the semi-finished club head to which the reinforcing member is welded. Theoretically, the more times the forging process is performed, the closer the eutectic bond between the metal material of the club head half-finished product and the metal material of the reinforcing member, which are welded together, and the metal microstructure of both metal materials. becomes more dense.

前記共鍛造によりクラブヘッド完成品を成形する工程の後に、所要のクラブヘッド製品要件に従って、クラブヘッドの打撃面部に溝入れ加工や外形加工を行い、その後、研磨、洗浄、塗装或はメッキなどの表面加工処理を経て、クラブヘッド最終製品を完成する。尚、上述した溝入れ加工や、研磨、洗浄、塗装及びメッキなどの表面加工処理は、既存の加工技術であるので、ここでは説明を省略する。 After the process of forming the finished club head by co-forging, the hitting surface of the club head is subjected to grooving and contouring according to the required club head product requirements, followed by polishing, cleaning, painting or plating. After surface processing, the final product of the club head is completed. The above-described grooving and surface processing such as polishing, cleaning, painting, and plating are existing processing techniques, and thus descriptions thereof are omitted here.

前述の説明から分かるように、本発明の軟鉄鍛造製ゴルフクラブヘッド製造方法は、軟鉄鍛造製のクラブヘッドにおける損傷しやすい補強予定部位に、高硬度材料からなる補強部材を入れ替えると共に、クラブヘッド半製品と補強部材との接合部位全周を溶接固着するようにすることにより、互いに異なる材質成分の金属部品同士を隙間なく一体的な金属構造体となり、さらに、共鍛造加工による高温高圧処理を経て、確実に共晶接合して、完全に一体化した金属構造体になることから、最終的な鍛造成形されたヘッド完成品の外観が完璧な一体感を呈する。一方で、当該ヘッド完成品の主体部分のほとんどは、元の低硬度鉄系材料からなり、一部の特定された補強予定部位のみに、高硬度鉄系材料を入れ替えることで、軟鉄鍛造アイアンヘッド本来の柔らかい打球感、優れたコントロール性、及び良好な打球音をそのまま維持することができる。 As can be seen from the above description, the method for manufacturing a soft-iron forged golf club head of the present invention replaces a portion of the forged soft-iron club head to be reinforced, which is likely to be damaged, with a reinforcing member made of a high-hardness material. By welding and fixing the entire circumference of the joint between the product and the reinforcing member, the metal parts with different material components become an integral metal structure without any gaps. , which are positively eutectic bonded into a fully unitary metal structure so that the final forged finished head appearance exhibits perfect unity. On the other hand, most of the main part of the finished head is made of the original low-hardness iron-based material. The soft hitting feel, excellent controllability, and good hitting sound can be maintained as they are.

本発明の製造方法によれば、よく破損する、軟鉄鍛造ゴルフアイアンヘッドの補強予定部位に、高硬度材料からなる補強部材を設置することにより、持ち運ぶ際の衝撃による外観の永久的な損傷を低減し、かつクラブヘッドの補強予定部位の硬度が高いので、打球衝突による摩耗や変形を抑えることができ、これにより、本発明の製造方法によって作られたアイアンヘッドやウェッジヘッドは、従来の単なる軟鉄で作られたクラブヘッドと比べると、使用寿命が延びており、それに加え、打撃面部及びソール部の耐摩耗性を向上させることができることから、長時間にわたりそのフェイスラインや設計されるソールバンス角などを維持し、打球の精度を確保することができる。 According to the manufacturing method of the present invention, by installing a reinforcing member made of a high-hardness material in the portion of the soft-iron forged golf iron head to be reinforced, which is often damaged, permanent damage to the appearance due to impact during transportation can be reduced. In addition, since the parts to be reinforced in the club head have a high degree of hardness, wear and deformation due to impact with a ball can be suppressed. Compared to the club head that has been developed, the service life is extended, and in addition, since the wear resistance of the hitting surface and sole can be improved, the face line and the designed sole bounce angle can be maintained for a long time. It is possible to maintain and ensure the accuracy of hitting balls.

10 棒材
20 クラブヘッド半製品
200 クラブヘッドプリフォーム
21、21A、21B 凹槽
30、30A、30B 補強部材
10 bar 20 club head half-finished product 200 club head preform 21, 21A, 21B recessed tank 30, 30A, 30B reinforcing member

Claims (3)

軟鉄鍛造製ゴルフクラブヘッド製造方法であって、クラブヘッド半製品を成形する工程と、補強部材を成形する工程と、クラブヘッド半製品と補強部材とを溶着接合する工程と、共鍛造によりクラブヘッド完成品を成形する工程とを含み、
前記クラブヘッド半製品を成形する工程において、ロックウェル硬度試験における硬度規格HRB50以上、HRB105以下の範囲である低硬度鉄系材料を、所定形状のクラブヘッド半製品に形成し、さらに、所定形状に形成したクラブヘッド半製品上の補強予定部位において凹槽を形成し、
前記補強部材を成形する工程において、ロックウェル硬度試験における硬度規格HRC15以上、HRC55以下の範囲である高硬度鉄系材料を、所定形状の補強部材に形成し、該補強部材の形状は、前記クラブヘッド半製品上の補強予定部位に形成された凹槽の形状と一致し、
前記クラブヘッド半製品と補強部材とを溶着接合する工程において、前記補強部材を、対応する前記クラブヘッド半製品上の凹槽に嵌め込み、さらに、該補強部材とクラブヘッド半製品の凹槽の周壁との間の結合部位を、溶接手段により全体的に一体接合し、
前記共鍛造によりクラブヘッド完成品を成形する工程において、一体に溶着接合された前記補強部材とクラブヘッド半製品を一緒に鍛造金型に入れ、700℃~1100℃の温度範囲で加熱し、少なくとも一回の鍛造加工を施し、その結果、該補強部材とクラブヘッド半製品は、熱間鍛造により共晶接合されると共に、所定形状のアイアンヘッドの完成品に成形されることを特徴とする軟鉄鍛造製ゴルフクラブヘッド製造方法。
A method for manufacturing a soft iron forged golf club head, comprising the steps of forming a semi-finished club head, forming a reinforcing member, welding and joining the semi-finished club head and the reinforcing member, and co-forging the club head. and molding the finished product;
In the step of molding the semi-finished club head, a low-hardness iron-based material having a hardness standard of HRB 50 or more and HRB 105 or less in the Rockwell hardness test is formed into a semi-finished club head having a predetermined shape, and further formed into a predetermined shape. forming a recessed groove in a portion to be reinforced on the semi-finished product of the formed club head;
In the step of forming the reinforcing member, a high-hardness iron-based material having a hardness standard of HRC 15 or more and HRC 55 or less in the Rockwell hardness test is formed into a reinforcing member having a predetermined shape, and the shape of the reinforcing member is the same as that of the club. Matches the shape of the groove formed in the portion to be reinforced on the head half-finished product,
In the step of welding and joining the semi-finished club head and the reinforcing member, the reinforcing member is fitted into the corresponding recess on the semi-finished club head, and the peripheral wall of the recess is formed between the semi-finished club head and the semi-finished club head. The joint part between is integrally joined by welding means as a whole,
In the step of forming the finished club head product by co-forging, the reinforcing member and the semi-finished club head welded together are placed together in a forging die, heated at a temperature in the range of 700° C. to 1100° C., and at least A soft iron forging characterized in that a single forging process is performed, and as a result, the reinforcing member and the semi-finished club head are eutectic bonded by hot forging and formed into a finished iron head having a predetermined shape. golf club head manufacturing method.
前記クラブヘッド半製品と補強部材とを溶着接合する工程において、溶接手段の溶接加熱温度は、1700℃~2500℃の温度範囲であり、前記補強部材とクラブヘッド半製品の凹槽の周壁との間の結合部位を溶接手段により全体的に一体接合した後、該補強部材とクラブヘッド半製品との溶接部位にサンドブラストをかけるようにして、溶接時に生じた高温によって生成された酸化物を落とし、さらに、溶着接合された補強部材とクラブヘッド半製品との溶接部位に表面研磨を施すようにして、溶接時に生じた過剰なスラグを除去することを特徴とする請求項1に記載の軟鉄鍛造製ゴルフクラブヘッド製造方法。 In the step of welding and joining the semi-finished club head and the reinforcing member, the welding heating temperature of the welding means is in the temperature range of 1700° C. to 2500° C., and the reinforcing member and the peripheral wall of the recess of the semi-finished club head are welded together. After the connecting parts between them are integrally joined by welding means, the welding parts between the reinforcing member and the semi-finished club head are sandblasted to remove oxides produced by the high temperature generated during welding, 2. The soft iron forging according to claim 1, wherein the welded portion between the welded reinforcing member and the semi-finished club head is surface-polished to remove excess slag generated during welding. A golf club head manufacturing method. 前記クラブヘッド半製品上の補強予定部位が、クラブヘッドの刃部、背後部、打撃面部、及びソール部の少なくとも一つの部位の局部あるいは全体を占め、前記凹槽の深さを、0.2mm~5.0mmの範囲に制御することを特徴とする請求項1又は請求項2に記載の軟鉄鍛造製ゴルフクラブヘッド製造方法。 The portion to be reinforced on the semi-finished club head partially or entirely occupies at least one of the blade portion, back portion, hitting surface portion, and sole portion of the club head, and the depth of the recess is 0.2 mm. 3. The method of manufacturing a soft iron forged golf club head according to claim 1, wherein the thickness is controlled within a range of up to 5.0 mm.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09271546A (en) * 1996-04-04 1997-10-21 Takefu Tokushu Kozai Kk Golf club head with toughened hard face and manufacture thereof
JP2013144102A (en) * 2011-11-28 2013-07-25 Acushnet Co Co-forged golf club head and method of manufacturing the same
US20160008871A1 (en) * 2014-07-14 2016-01-14 Chi-Hung Su Manufacturing method of a weight parts integratedly connected with a forged golf club head
JP3214539U (en) * 2016-10-24 2018-01-25 アクシュネット カンパニーAcushnet Company Co-forged golf club head
JP2018029760A (en) * 2016-08-24 2018-03-01 基宏 蘇 Method for manufacturing iron golf club head by heterogeneous metal bonding

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09271546A (en) * 1996-04-04 1997-10-21 Takefu Tokushu Kozai Kk Golf club head with toughened hard face and manufacture thereof
JP2013144102A (en) * 2011-11-28 2013-07-25 Acushnet Co Co-forged golf club head and method of manufacturing the same
US20160008871A1 (en) * 2014-07-14 2016-01-14 Chi-Hung Su Manufacturing method of a weight parts integratedly connected with a forged golf club head
JP2018029760A (en) * 2016-08-24 2018-03-01 基宏 蘇 Method for manufacturing iron golf club head by heterogeneous metal bonding
JP3214539U (en) * 2016-10-24 2018-01-25 アクシュネット カンパニーAcushnet Company Co-forged golf club head

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