JP2007160702A - Multilayer metal-clad plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multilayer metal-clad plate which can relax impact while utilizing the repulsive force of a surface layer. <P>SOLUTION: The multilayer metal-clad plate having at least three layers is provided with a titanium layer made of pure titanium or a titanium alloy as the surface layer, a low Young's modulus layer whose Young's modulus is lower than that of the titanium layer as a layer next to the titanium kayer, and a high deformation-resistance layer whose deformation-resistance is higher than that of the titanium layer as a layer next to the low Young's modulus layer. In the titanium layer, when the Young's modulus is E (kgf/mm<SP>2</SP>), the thickness is h<SB>1</SB>(mm), and W=9,100/E/h<SB>1</SB><SP>3</SP>, the thickness h<SB>2</SB>(mm) of the low Young's modulus layer is made to be h<SB>2</SB>>W. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a multilayer metal clad plate and a golf club head using the clad plate.

  Conventionally, golf clubs have been designed in consideration of the feeling of use and the flight distance of the ball. Among them, the club head is manufactured in various shapes with various materials in consideration of the position of the center of gravity and the repulsive force of the face. Has been. In recent years, a face member disposed on a ball striking surface and a head member that holds the face member are made of different materials, and a member in which a face member is fitted in a recess provided in the head member is often used. Usually, a metal plate such as a titanium alloy, stainless steel, steel or the like is used as the face member.

  As such a face member, in Patent Document 1, a two-layer clad plate of a low specific gravity material such as titanium alloy or aluminum and a high specific gravity material such as steel or stainless steel is used for the face member. It is described that the club head has a low center of gravity by arranging the low specific gravity material on the ball striking surface.

  By the way, pure titanium and titanium alloys are widely used in various sporting goods and the like because they are lightweight and easily cause elastic deflection deformation, and the restoring force of the deflection deformation can be used as a repulsive force. However, since the multilayer metal clad plate described in Patent Document 1 is in a state in which the titanium alloy and the steel are directly bonded together, the steel inhibits the deflection deformation of the titanium alloy. . Therefore, hitting a ball with a golf club equipped with such a multi-layer metal clad plate as a face member not only makes full use of the repulsive force of the titanium alloy at the time of impact, but also the impact of the impact is transmitted to the hand, resulting in competition. Will give the person a feeling of fatigue.

In contrast to this, Patent Document 2 discloses that a multi-layer metal clad plate in which a tough metal layer and a soft metal layer are alternately laminated is disposed on a golf club, thereby making use of the repulsive force of the face and softening. It is described that a good shot feeling can be obtained.
In Patent Document 3, a multilayer metal clad plate in which a tough titanium alloy and stainless steel are joined with a thin aluminum layer of 0.05 mm, which is softer than these, is used. It is described that the low specific gravity material is disposed on the ball striking surface.

However, usually, simply by laminating a tough metal layer and a soft metal layer, the rebound force of the face is utilized and a soft feel at impact is not obtained. For example, the multilayer metal described in Patent Document 3 is used. Even in the clad plate, aluminum with lower hardness than titanium alloy or steel is arranged in the middle, but it is arranged in the form of a thin layer, so the deflection deformation of the titanium alloy cannot be fully exerted, and soft It is also difficult to obtain a shot feeling.
Thus, conventionally, an appropriate relationship between the tough metal layer and the soft metal layer has not been found, and therefore a method of obtaining a soft shot feeling while utilizing the repulsive force of the surface layer of the face member. It has not been established.
That is, it is difficult to sufficiently satisfy the demand in a multilayer metal clad plate that is required to reduce the impact impact while utilizing the repulsive force of the layer disposed on the surface, such as a face member of a golf club. There is a problem that there is.

JP-A-9-154987 Registered Utility Model No. 3029832 JP-A-10-151698

  The subject of this invention is providing the multilayer metal clad board which can relieve the impact of an impact, utilizing the repulsive force of the layer distribute | arranged to the surface.

The inventors have arranged a layer made of titanium or a titanium alloy (titanium layer) on the surface of the multilayer metal clad plate, and arranged a low Young's modulus layer having a lower Young's modulus than the titanium layer on the back side of the titanium layer, A high deformation resistance layer having a higher deformation resistance than the titanium layer is disposed on the back side of the low Young modulus layer, and the thickness of the low Young modulus layer is determined from the Young's modulus and thickness of the titanium layer by a predetermined calculation formula. It has been found that a multilayer metal clad plate that can relieve impact impact while utilizing the repulsive force of the surface layer can be obtained by setting the value to be not less than the value calculated on the basis of the above.
That is, the present invention is a multi-layer metal clad plate having a multi-layer structure of three or more layers, wherein a titanium layer made of pure titanium or a titanium alloy is provided as a surface layer, A low Young's modulus layer having a low Young's modulus is provided as a next layer of the titanium layer, and a high deformation resistance layer having a higher deformation resistance than the titanium layer is provided as a next layer of the low Young's modulus layer. When the rate is E (kgf / mm ² ), the thickness is h ₁ (mm), and W = 9100 / E / h ₁ ³ , the thickness h ₂ (mm) of the low Young's modulus layer is h Provided is a multilayer metal clad plate formed so as to satisfy ₂ > W.

  According to the present invention, since the surface layer is provided with a titanium layer made of pure titanium or a titanium alloy, a repulsive force due to flexural deformation can be generated on the surface of the multilayer metal clad plate at the time of impact. Further, as a next layer of the titanium layer, a low Young's modulus layer having a lower Young's modulus than the titanium layer is provided, and as a next layer of the low Young's modulus layer, a high deformation resistance layer having a higher deformation resistance than the titanium layer is provided. Since the thickness of the low Young's modulus layer is equal to or greater than the value calculated from the Young's modulus and thickness of the titanium layer based on a predetermined calculation formula, the deformation deformation of the surface layer is hindered by the high deformation resistance layer, etc. Can be suppressed. Therefore, the impact of the impact can be reduced while utilizing the repulsive force of the surface layer on the clad plate.

In the following, a preferred embodiment of the present invention will be described by taking, as an example, a multilayer metal clad plate used for a face member of a golf club as shown in FIGS.
The multilayer metal clad plate 4 in this embodiment has a three-layer structure, and from the surface side, a titanium layer 1 made of pure titanium or a titanium alloy, a low Young's modulus layer 2 having a lower Young's modulus than the titanium layer 1, and the titanium The high deformation resistance layer 3 having higher deformation resistance than the layer 2 is provided in this order.

The titanium layer 1 usually has a thickness of 0.5 to 5.0 mm, and is 1.0 to 2.5 mm in that the restoring force of bending deformation can be more effectively converted into a repulsive force. Is preferred.
In addition, pure titanium or a titanium alloy can be used for the titanium layer 1. Examples of the titanium alloy include α-type titanium alloys such as Ti-5Al-2.5Sn, Ti-5Al-6Sn-2Zr-1Mo, and the like. -0.2Si, Ti-8Al-1Mo-1V, near α type titanium alloys such as Ti-6Al-2Sn-4Zr-2Mo, α + β type titanium alloys such as Ti-6Al-4V, near β type titanium alloys such as Ti-8Mn Β-type titanium alloys such as Ti-10V-2Fe-3Al, Ti-20V-4Al-1Sn, and Ti-13V-11Cr-3Al can be used.
As such pure titanium or titanium alloy, β-type titanium alloy is suitable in that it exhibits high deformation resistance while having a low Young's modulus.

The low Young's modulus layer 2, the Young's modulus of the titanium layer ^{1 E (kgf / mm 2)} , the thickness is taken as _{h 1 (mm), W =} 9100 / E / h 1 3, the W It is formed to have a thickness h ₂ (mm) exceeding the value. Moreover, although the upper limit is not specifically limited, Usually, it is 3 mm or less.
The reason why the thickness of the low Young's modulus layer 2 is set to such a thickness is that the effect of reducing the impact is not obtained below the value of W. Moreover, even if the thickness exceeds 3 mm, it is difficult to further improve the effect of reducing the impact impact while utilizing the repulsive force of the surface layer, and the thickness of the multilayer metal clad plate 4 increases, resulting in an increase in cost. There is a risk of becoming.
The metal used for the low Young's modulus layer 2 is not particularly limited as long as the Young's modulus layer 2 is a metal capable of forming a Young's modulus lower than that of the titanium layer 1. For example, aluminum or an alloy thereof can be used. , Magnesium, magnesium alloy, near, silver, silver wax, lead and the like can be used. Among these, pure aluminum and aluminum alloys are preferable in that they have a relatively low Young's modulus among common metals, are easily available, and have excellent workability.

  Note that the Young's modulus of the titanium layer 1 and the low Young's modulus layer 2 is intended to be the Young's modulus of a layer formed as a multilayer metal clad plate. This Young's modulus can be measured by directly measuring the Young's modulus of the titanium layer 1 or the low Young's modulus layer 2 by, for example, taking it out of the multilayer metal clad plate 4 or without joining the titanium layer or the low Young's modulus layer. It can be determined by an indirect method of measuring the processing rate received during the joining of the metal clad plate 4 and the heat treatment conditions individually applied to the titanium layer and the low Young's modulus layer.

The high deformation resistance layer 3 is thicker than the titanium layer 1 in that the total thickness of the multi-layer metal clad plate 4 is suppressed to be too thick, the face surface can be made compact, and the cost can be suppressed from being increased too much. Is preferably thin.
The metal used for the high deformation resistance layer 3 is not particularly limited as long as the high deformation resistance layer 3 is a metal that can form a deformation resistance higher than that of the titanium layer 1. Stainless steel, pure titanium, titanium alloy, copper alloy, nickel-base alloy, and the like can be used. Among these, steel and stainless steel are preferable in that they are easily available, have excellent workability, and can increase the productivity of the clad plate.
When the multilayer metal clad plate 4 has a higher strength, it is generally a high-tensile steel called high-tensile steel, a cold-worked and hardened stainless steel, or a quenched martensitic stainless steel. It is preferable to use steel such as precipitation hardening stainless steel or stainless steel. Moreover, when making a multilayer metal clad board lighter, it is preferable to use pure titanium or a titanium alloy.

  The deformation resistance of the titanium layer 1 and the high deformation resistance layer 3 is intended to be the deformation resistance of what is formed as a multilayer metal clad plate. For example, the deformation resistance of the titanium layer 1 or the high deformation resistance layer 3 can be directly measured by taking out the deformation resistance of the titanium layer 1 or the high deformation resistance layer 3 or without joining the titanium layer or the high deformation resistance layer 3. It can be determined by an indirect method of measuring the processing rate received during the joining of the multilayer metal clad plate 4 and the heat treatment conditions individually applied to the titanium layer and the high deformation resistance layer 3.

  Further, the thickness of each of the titanium layer 1, the low Young's modulus layer 2, and the high deformation resistance layer 3 is intended to be the thickness of the main hitting point portion when used for a golf club or the like. In other cases, when the in-plane thickness is different, a value obtained by determining the center of gravity of the outer shape and measuring the thickness of the center of gravity is intended.

Next, a manufacturing method for manufacturing the multilayer metal clad plate 4 will be described.
The multi-layer metal clad plate 4 of the present embodiment can be manufactured using a manufacturing method for manufacturing a general multi-layer metal clad plate. For example, a raw metal plate in which the metal material of each layer is formed in a plate shape in advance is used. It is possible to use a rolling joining method in which they are stacked and rolled.
As a rolling joining method for producing the multilayer metal clad plate 4 of the present embodiment, there is a warm rolling joining method in which the material metal plate is rolled at a rolling rate of 10 to 70% in a state of being heated to 100 to 400 ° C. in advance. preferable. Further, at this time, as each material metal plate, it is preferable to use a metal plate having a thickness of 0.3 mm or more from the viewpoint that buckling deformation at the time of manufacturing can be prevented and manufacturing yield can be increased.

The multilayer metal clad plate 4 formed as described above can be used as a face member of a golf club by appropriately processing the outer shape to a necessary shape and size, and can be joined to a separately manufactured head member 5. Golf club heads can be manufactured.
For joining the face member and the head member 5, a general metal member joining method such as a fitting method such as caulking, brazing, adhesion using an adhesive, or the like can be used.
Moreover, as a use of the golf club head manufactured by such a manufacturing method, it can use for what is called wood, such as a driver, a buffy, and a spoon, and various things, such as an iron and a putter.

In the present embodiment, the face member of the golf club has been described as an example from the viewpoint that the multilayer metal clad plate 4 can effectively exert the effect of reducing the impact impact while utilizing the repulsive force of the surface layer. In the present invention, the use of the multilayer metal clad plate 4 is not limited to the face member of a golf club head.
Further, in the present embodiment, as the face member of the golf club, it is possible to suppress the total thickness of the multilayer metal clad plate 4 from becoming too thick and to make the face surface compact and to suppress the cost from being increased excessively. Although the three-layer clad plate 4 has been described as an example, in the present invention, the number of layers of the multilayer metal clad plate is not limited to only three layers, and a laminated structure is further provided on the back side of the high deformation resistance layer. Multi-layer metal clad plates having more than one layer are also intended.
Further, as long as the effect of the present invention is not impaired, surface treatment, plating, painting, or the like may be applied to the surface of the titanium layer, if necessary.

EXAMPLES Next, although an Example is given and this invention is demonstrated in more detail, this invention is not limited to these.
(Examples 1-10, Comparative Examples 1-7)
The first layer is pure titanium or titanium alloy, the second layer is pure aluminum or aluminum alloy, the third layer is stainless steel, pure titanium, cold-rolled steel plate (SPCC), cold-rolled high-tensile steel plate (SPFC) A multilayer metal clad plate is formed by warm rolling at 350 ° C. so that the thickness from the first layer to the third layer becomes the thickness shown in Table 1, and after the outer shape processing, the first layer becomes a ball striking surface. An iron was prepared by arranging it on the head member. At this time, the head member and the face member were joined by caulking fitting except for Examples 5 and 10 joined by TIG welding.

(Comparative Example 8)
Examples 1 to 10 and Comparative Examples 1 to 7 except that the first to third layers were assembled and welded in vacuum using the materials shown in Table 1 and then hot rolled at 900 ° C. An iron was produced in the same manner.

(Comparative Examples 9 and 10)
Irons were produced in the same manner as in Examples 1 to 10 and Comparative Examples 1 to 7, except that a JIS type 4 pure titanium single plate was used instead of the clad plate.

Evaluation 1 (Measurement of Young's modulus, calculation of W value, measurement of deformation resistance)
About evaluation of each Example and a comparative example, it implemented as follows.
(Measurement of Young's modulus)
The first layer material plate was rolled so as to have the same rolling rate at the same temperature as in the production of the multilayer metal clad plate in each example and comparative example, and the Young's modulus was measured by a resonance method. .
(Calculation of W value)
The Young's modulus of the first layer obtained from the measurement of the Young's modulus is defined as E (kgf / mm ² ), and the W value is calculated from the E value and the thickness of the first layer from h ₁ (mm) based on the following equation. Asked.
Formula: W = 9100 / E / h ₁ ³
(Measurement of deformation resistance)
Each material plate of the first layer and the third layer is separately rolled so as to have the same rolling rate at the same temperature as in the production of the multilayer metal clad plate in each example and comparative example, and the strength of the tensile test is determined. Measurements were performed.
The measurement results are shown in Table 2.

Evaluation 2 (Evaluation of hit feeling, presence / absence of deformation)
The golf balls were actually tested 100 times using the irons of the examples and comparative examples, and the sensory evaluation was performed with “◯” indicating that a good hit feeling was obtained and “X” indicating that the hand felt an impact.
In addition, after trial hitting of each iron, the deformation of the face surface was visually confirmed, and the case where no deformation was observed was evaluated as “◯”, and the case where the deformation was observed was evaluated as “X”.
The results are shown in Table 3.

このことから、３層以上の多層構造を有する多層金属クラッド板に、純チタンもしくはチタン合金からなるチタン層を表面に配し、前記チタン層の裏面側に前記チタン層よりヤング率の低い低ヤング率層を配し、該低ヤング率層の裏面側に前記チタン層よりも変形抵抗の高い高変形抵抗層を配して、さらに、前記チタン層のヤング率をＥ（ｋｇｆ／ｍｍ²）、厚さをｈ₁（ｍｍ）、Ｗ＝９１００／Ｅ／ｈ₁ ³としたときに、前記低ヤング率層の厚さｈ₂（ｍｍ）を、ｈ₂＞Ｗとなるよう形成することで多層金属クラッド板を表面層の反発力を活用しつつインパクトの衝撃を和らげ得るものとし得ることがわかる。

For this reason, a titanium layer made of pure titanium or a titanium alloy is arranged on the surface of a multilayer metal clad plate having a multilayer structure of three or more layers, and a low Young's modulus lower than that of the titanium layer is provided on the back side of the titanium layer. A high deformation resistance layer having a higher deformation resistance than the titanium layer on the back side of the low Young's modulus layer, and further, the Young's modulus of the titanium layer is E (kgf / mm ² ), the thickness h ₁ (mm), when the _{W = 9100 / E / h 1} 3, wherein the thickness of the low Young's modulus layer h ₂ (mm), the multilayer by forming so as to be h _2> W It can be seen that the metal clad plate can reduce the impact impact while utilizing the repulsive force of the surface layer.

Sectional drawing which shows the multilayer metal clad board of one Embodiment. Sectional drawing which shows the use condition to the golf club head of the multilayer metal clad board of one Embodiment.

Explanation of symbols

1 Titanium layer 2 Low Young's modulus layer 3 High deformation resistance layer 4 Multi-layer metal clad plate

Claims (4)

A multilayer metal clad plate having a multilayer structure of three or more layers, wherein a titanium layer made of pure titanium or a titanium alloy is provided as a surface layer, and a low Young's modulus layer having a lower Young's modulus than the titanium layer is a layer of the titanium layer. Provided as a next layer, a high deformation resistance layer having a higher deformation resistance than the titanium layer is provided as a next layer of the low Young's modulus layer,
The Young's modulus of the titanium layer E (kgf / mm ^2), the thickness of the _{h 1 (mm), W =} 9100 / E / h 1 ^{when 3} was the low Young's modulus layer thickness h ₂ ( mm) is formed so that h ₂ > W.   The multilayer metal clad plate according to claim 1, wherein the low Young's modulus layer is formed of pure aluminum or an aluminum alloy.   The multilayer metal clad plate according to claim 1 or 2, wherein the high deformation resistance layer is formed of any one of stainless steel, steel, and a titanium alloy.   4. A golf club head, wherein the multilayer metal clad plate according to claim 1 is used, and the titanium layer of the multilayer metal clad plate is arranged to be a ball striking surface.

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