JP2003275346A - Stamp die for golf club head and golf club head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stamp die for a golf club head with which the distil end of a stamp forming part is prevented from chipping off and stamping can satisfactorily be performed by improving the shape of the stamp forming part for forming the stamp on the surface of the golf club heads formed with the stamp die in the case of stamping the surface of the golf club head, and to provide the golf club heads stamped with the stamp die. <P>SOLUTION: The stamp die 10 is obtained by integrally forming a base 12 and the stamp forming part 11 formed of a side wall 15a, a side wall 15b and a distal end part 14 to be in a projecting form over the base part 12. In the shape of the cross section of the stamp forming part 11, an inclination angle θ formed by the side wall 15a and the side wall 15b ranges 60°±3°. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a marking die for forming a design portion on a surface of a golf club head by stamping.

[0002]

2. Description of the Related Art Conventionally, in golf club heads,
On the surface of the head body, the brand name, mark,
A design part such as a manufacturer's name or numbers and letters is provided by engraving formed by forming a recess.

When a design portion is formed on the surface of the head body by engraving, a method for engraving the engraving is, for example, as shown in FIG. An engraving pattern is formed on a surface of the head body to be engraved by using an engraving die 10 formed by a stamp forming part 11 formed in a mold and a base part 12 that is a part that supports the engraving forming part 11. The engraving method has been adopted in which the parts 11 are opposed to each other and the base part 12 is pressed with a predetermined pressure to form an inscription on the surface of the head body.

Further, the marking forming portion 11 of the marking die 10
6 is integrally formed in a convex shape by the base portion 12 and the side wall 15a, the side wall 15b, and the tip portion 14 upward from the base portion 12, as shown in FIG. In most of the cases, the inclination angle θ formed by the side wall 15a and the side wall 15b is about 50 °.

[0005]

However, in the case of stamping with the conventional stamping die 10 shown in FIG. 6, the inclination angle θ formed by the side wall 15a and the side wall 15b is a sharp inclination of about 50 °. When the marking die 10 is pressed against the surface of the head main body, the frictional resistance with the side walls 15a and 15b increases. In particular, when the material of the head main body is formed of a relatively hard material such as SUS, titanium, titanium alloy, etc., the tip forming portion 11 is chipped or the surface of the head main body is not covered with the marking forming portion 11. It becomes difficult to come off, etc.
There was a problem that work efficiency deteriorated. Further, this causes a problem such as variations in marking due to unclear contours of characters and numbers in the design portion.

[0006] Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art by making a mark on the surface of the golf club head when the mark is formed on the surface of the golf club head. By improving the shape of the marking forming portion for forming, it is possible to prevent the tip of the marking forming portion from being chipped, and a marking die for a golf club head capable of providing good marking, and the marking die. The purpose of the present invention is to provide a golf club head formed by stamping.

[0007]

In order to achieve the above object, the present invention has the following constitution. The stamping die according to claim 1 of the present invention is a stamping die 10 for forming design portions such as letters, numbers and marks on the surface of a golf club head. The stamping die 10 includes a base portion 12 and The sidewalls 15a and 15b and the stamp forming portion 11 formed in a convex shape by the tip portion 14 are integrally formed upward from the base portion 12. In the sectional shape of the stamp forming portion 11, the sidewall 15a and the sidewall 15b are formed. Is an engraved mold characterized by being formed at an inclination angle θ of 60 ° ± 3 °.

Further, in the golf club head according to claim 2 of the present invention, in the cross-sectional shape of the design portion 4 formed by providing the surface of the golf club head 1, the bottom surface forming the design portion 4 is formed. 5, side wall 6a, side wall 6
b, the inclination angle θ2 formed by the side wall 6a and the side wall 6b.
Is a golf club head which is formed at 60 ° ± 3 °.

A third aspect of the present invention is the golf club head according to the second aspect, wherein the material forming the golf club head 1 has a Vickers hardness of 230 to 350. The head.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail based on the embodiments shown in the drawings. FIG. 1 is an external view showing a golf club head in which a marking is formed on the surface of a head body by stamping with the marking die of the present invention, and FIG. 2 is a marking die suitable for carrying out the present invention. Explanatory diagram showing FIG.
2 is a cross-sectional view showing a convex cross-sectional shape of the marking formation portion of FIG. 2, and FIG. 4 is a cross section of a design portion formed by forming a recess on the surface of a golf club head using the marking die of the present invention. It is sectional drawing which shows surface shape. In this embodiment, the same reference numerals are used when the same reference numerals are used.

In the golf club head 1 shown in FIG. 1, a head body 2 is formed by casting or forging using a metal material, and a mark, a character to be displayed, is displayed at a predetermined position on the surface 3 of the head body 2. The design portion 4 including numbers and the like is formed by a marking device described later.

FIG. 2 is a diagram for explaining a suitable marking die of the present invention. In the marking die 10 of the present invention, a convex marking forming portion 11 for marking the surface 3 of the head body 2 and a base 12 for supporting the marking forming portion 11 are integrally formed. The stamp forming portion 11 is formed in a convex shape in which characters, numbers, marks, etc. to be stamped are projected.

Further, as shown in FIG. 3 as a sectional view of the stamping die 10, the stamping die 10 has a base 12 and a side wall 15a, a side wall 15b, and a tip 14 which project upward from the base 12. In the sectional shape of the marking forming portion 11, the inclination angle θ formed by the side wall 15a and the side wall 15b is 60 ° ±.
It is formed at 3 °.

The reason why the inclination angle θ formed by the side wall 15a and the side wall 15b is 60 ° ± 3 ° is that when the inclination angle θ exceeds 60 ° + 3 °, marking is performed on the marking forming portion 11 by marking. Buckling may occur. On the other hand, when the inclination angle θ is less than 60 ° −3 °, a steep inclination occurs, and when the marking die 10 is pressed against the surface 3 of the head body 2, it is This is because the ease of removal of the marking die 10 becomes extremely poor, the frictional resistance between the side wall 15a and the side wall 15b increases, the tip portion 14 is chipped, and the life of the marking die 10 is extremely shortened.

Further, the inclination angle θ of the marking die 10
However, within the range of 60 ° ± 3 °, the material of the surface 3 on which the surface 3 of the head body 2 is engraved has a Vickers hardness of 230 to 3 such as SUS, titanium, and titanium alloy.
More effective with a material that is 50. Among the carbon steel materials, those having a Vickers hardness of about 140 to 220, such as S25C and S35C, among the carbon steel materials, the hardness of the material is relatively soft among the carbon steel materials, and therefore the inclination angle θ is formed to be an acute angle. This is because there is no influence such as chipping of the tip portion 14 of the stamp forming portion 11.

As shown in FIG. 4, the cross-sectional shape of the design portion 4 formed by forming the concave portion on the surface 3 of the golf club head 1 using the stamping die 10 having the above structure is as shown in FIG. Bottom surface 5 and side wall 6 for forming the recess 4a
Among the side walls 6b, the inclination angle θ2 formed by the side wall 6a and the side wall 6b is formed to be 60 ° ± 3 °.

Next, the marking die 1 of the present invention having the above construction
A method of forming the golf club head 1 by stamping the surface 3 of the head body 2 using 0 will be specifically described. FIG. 5 is a diagram for explaining a stamping method using the stamping die 10 of the present invention.

The marking device 20 shown in FIG. 5 comprises a fixed support 21 for fixing the material to be marked and a support 22 for holding the marking die 10. The support 22 and the marking die 10 are provided.
Are linked together.

Here, the inclination angle θ of the marking forming portion 11 shown in FIG. 3 was formed to be 60 °. The head body 2 shown in FIG. 1 was formed by forging, and the material used was SUS having a Vickers hardness of 250.

First, as shown in FIG. 5, the marking die 1 is previously attached to a support 22 for supporting the marking die 10 of the marking device 20.
0 is held with the marking surface facing down. Next, the head body 2 which is the object to be engraved is held on the fixed support base 21 of the engraving device 20 with the surface 3 to be engraved on the head body 2 facing upward. In this way, after the head main body 2 is positioned and held on the fixed support base 21, the marking die 10 is pressed against the surface 3 of the head main body 2 with a predetermined pressure by the pressing operation of the support body 22, Design part 4 consisting of stamped on 3
To form.

Thus, when the marking die 10 is pressed against the surface 3 of the head body 2 by forming the inclination angle θ of the marking formation portion 11 to 60 ° ± 3 °, the sidewall 15a of the marking die 10 is pressed. , 15b frictional resistance is reduced,
Good marking can be performed without missing the tip of the marking forming portion. Further, the marking forming portion 11 is easily removed from the surface of the head body during stamping, and therefore,
A golf club head can be manufactured efficiently.

The material of the marking die 10 is, for example,
Alloy tool steel, carbon tool steel, high speed tool steel,
Powder high speed tool steel and steel materials are preferably used.

In the present embodiment and the drawings, the description has been made based on the iron head, but the present invention is not limited to this and may be applied to a wood club head, a putter head or the like.

As a means for hitting, various means usable for stamping such as a pneumatic press and a hydraulic press can be used.

[0025]

As described above, according to the marking die of the present invention, the inclination angle θ of the marking forming portion is formed to be 60 ° ± 3 ° in the cross section of the convex forming portion. Therefore, when the marking die is pressed against the surface of the head main body, the frictional resistance with the side wall is reduced, and good marking can be performed without the tip of the marking forming portion being missing. In addition, the stamp forming portion is easily removed from the surface of the head body during stamping, so that the golf club head can be manufactured efficiently.

Further, in the golf club head using the engraved mold, the contours of characters and numbers in the design portion become clear.

[Brief description of drawings]

FIG. 1 is an external view showing a golf club head having a marking formed on the surface of a head body, which is stamped with a marking die of the present invention.

FIG. 2 is an explanatory view showing a marking die suitable for carrying out the present invention.

FIG. 3 is a cross-sectional view showing a convex cross-sectional shape of the marking forming portion of FIG.

FIG. 4 is a cross-sectional view showing a cross-sectional shape of a design portion formed by forming a recess on the surface of a golf club head using the marking die of the present invention.

FIG. 5 is an explanatory view showing a stamping method using the stamping die of the present invention.

FIG. 6 is a cross-sectional view illustrating a convex cross section of a conventional marking formation portion.

[Explanation of symbols]

1 golf club head 2 head body 3 surface 4 Design Department 4a recess 5 Bottom 6a side wall 6b Side wall 10 stamped type 11 Engraving part 12 base 14 Tip 15a side wall 15b side wall 20 marking device 21 Fixed support 22 Support

Claims (3)

[Claims] 1. A marking die 10 for forming a design portion such as letters, numbers and marks on a surface of a golf club head, the marking die 10 comprising a base portion 12 and the base portion 12. The side wall 15a, the side wall 15b, and the stamp forming portion 11 formed in a convex shape by the tip portion 14 are integrally formed on the upper side,
In the sectional shape of the stamp forming portion 11, the side wall 15
An engraving die having an inclination angle θ formed by a and the side wall 15b of 60 ° ± 3 °. 2. A bottom surface 5, a side wall 6a, and a side wall 6 forming the design portion 4 in a cross-sectional shape of the design portion 4 formed by providing a recess on the surface of the golf club head 1.
b, the inclination angle θ2 formed by the side wall 6a and the side wall 6b.
Is formed at 60 ° ± 3 °, which is a golf club head. 3. The golf club head according to claim 2, wherein the material forming the golf club head 1 has a Vickers hardness of 230 to 350.