JP3000921B2 - Golf club and manufacturing method thereof - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a process for the preparation of Gorufukura blanking及 benefactor.

[0002]

Conventionally, face grooves have been formed on a face surface of a golf club head (hereinafter, referred to as a head) at substantially equal intervals along a sole surface. As an improvement of such a face groove, as shown in FIG. 1 of Japanese Utility Model Application Laid-Open No. 5-48971, grooves are arranged in a circle, an ellipse, or a polygon with a sweet spot as a center point to provide an appropriate spin to a golf ball. Giving the golf ball the direction of flight to be corrected, Japanese Utility Model Publication No. 60-610
FIG. 1 of Japanese Patent Application Laid-Open Publication No. 62-62, discloses a head that corrects hooks and slices by inclining a part of the face groove. Further, a head for radially providing face grooves on the face surface as shown in FIG. 1 of JP-A-7-313639 to prevent a water film from being formed between the face surface and the golf ball,
Japanese Patent Application Laid-Open No. 8-777 discloses a head in which a large number of polygonal face grooves centered on a sweet spot are provided concentrically on the face surface.

In such a conventional head, a limited number of face grooves are formed on a face having a limited area. Therefore, the number of the face grooves is limited, and a good spin is applied to a golf ball. There was a problem that it could not be given.

[0004] Therefore, the present invention aims to provide a method of manufacturing Gorufuku <br/> La Bed及 benefactor can give good spin to the golf ball to solve the above problems.

[0005]

SUMMARY OF THE INVENTION The present invention provides a head and a chassis.
Oite the face grooves on the face surface of the golf club said head comprising a shift to Gorufukura blanking formed substantially parallel to and equally spaced along the sole, many forms from the face groove the face grooves than smaller cross small groove Then
In addition, these small grooves are provided to intersect, and
The small grooves are formed densely on both the left and right sides, and the face surface
Since the central portion is Gorufukura blanking, wherein the small groove is formed in the rough, the small groove is in contact not to the golf ball face groove only when the shot can be given a good spin.

The present invention also provides a golf club for connecting shafts.
Cut by a cutting tool to face the club head body, in the manufacturing method of Gorufukura Bed finishing the face after this Migaku Ken to a flat, cutting of the cutting tool
A mark is provided on the face surface so as to intersect,
The cutting traces are densely formed on both the left and right sides of the ground surface,
The cutting trace in the central portion of the face surface is formed rough, when finish flat the face Migaku Ken to manufacture a Gorufukura blanking characterized by polishing to leave a cutting mark by the cutting tool This is a method in which a small groove that gives spin to a golf ball at the time of a shot can be formed by using a trace of cutting by a cutting tool.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 and 2, an iron,
Iron-type golf clubs such as PW (pitting wedge), SW (sand wedge), and LW (lob wedge) include a head 1 and a shaft 2. The head 1 has a face surface 3 on a front surface, a concave portion 4 called a cavity on a rear surface, a sole 5 at a lower portion, a heel 6 at a lower portion, and a hosel 7 for connecting the shaft 2 at an upper portion. Further, a face groove 8 called a score line or the like is formed on the face surface 3. The face grooves 8 are formed substantially parallel and at equal intervals along the sole 5. The face groove 8 has a width A0.6 to 0.9 mm and a depth B0.3 to
0.5 mm, the length C between the centers is 2.5 to 4.5 mm
Is formed. In the drawing, reference numeral 11 denotes a plating layer treated on the surface of the head 1, and reference numeral 12 denotes a coarse layer formed on the inside of the plating layer 10 indicated by a dashed line on the face surface 3 so as to eliminate the gloss of the plating layer 11. Plane.

Next, a manufacturing method will be described. FIG. 3 shows a first step, in which the surface of the head body 1A formed by forging or casting is cut with a sharp cutting tool 13 such as an end mill.
The surface is cut flat by cutting from one direction (arrow X). At this time, a cutting trace 14 in one direction is formed. Figure 4 shows a second step, to flat cutting surface by cutting from the other direction (arrow Y) of the surface of the head body 1A by a cutting tool 13 such as end mill. At this time, cutting marks 15 in the other direction are formed. FIG. 5 shows a third step in which the face groove 8 is formed by a cutting tool 16 such as a small-diameter end mill. Next, as shown in a fourth step in FIG. 6, the surface of the head main body 1A is polished using a buff 17 to finish the surface. During this polishing process, an abrasive (not shown) is attached to the buff 17, and the buff 17 is rotated by a motor (not shown) for polishing. An abrasive (not shown) may be provided on the face surface 3 and polished by the buff 17. During this polishing process, the cutting traces 14, 15
Are formed so that the small grooves 9 and 10 are formed. Then, as shown in the fifth step of FIG. 7, the surface is plated to form a plating layer 10, and thereafter, a sand blasting process is performed in which sand 18 is shot at the center of the face surface 3 to form a rough surface 12, and the head is formed. Make one. The buff 17 may be a cloth buff, a brush buff, a wire buff, a felt buff, or a PVA whetstone in which an abrasive is directly held in the buff.

As described above, in the above embodiment, the small number of grooves 9 and 10 having a smaller cross section than the face groove 8 are formed on the face surface 3 more than the face groove 8, so that a golf ball (not shown) can be used when a shot is made. ), Not only the face groove 8 but also a large number of small grooves 9 and 10 come into contact with each other, giving a relatively large spin to the golf ball and extending the flight distance of the golf ball. By forming a plurality of the small grooves 9 and 10 between the face grooves 8 as shown in FIG. 2, a relatively large spin can be reliably given to the golf ball.

Further, the plurality of small grooves 9 and 10 are provided with a cutting tool 13.
When cutting, and when polishing the surface, the cutting trace 1
Since the small grooves 9 and 10 are formed by leaving the small grooves 4 and 15, the small grooves 9 and 10 can be easily formed.

Moreover, the cutting traces 14 and 15 are cut in both directions (arrows X and Y) by the cutting tool 13 so that the cutting traces 14 and 15 intersect. As shown in FIG. Small grooves 9 and 10 are formed densely on both left and right sides, and small grooves 9 and 10 are formed roughly in the center of the face surface 3. As a result, when the golf ball deviates from the sweet spot at the time of a shot, an appropriate spin is given to the golf ball, and the flight direction can be corrected.

It should be noted that the present invention is not limited to the above-described embodiment. For example, in the embodiment, an iron type golf club has been described. However, the present invention relates to a so-called metal wood club formed by integrally joining a plurality of metal shells. Various modifications are possible, such as using the above-described manufacturing method for the face.

[0013]

The present invention comprises a head and a shaft.
Oite the Gorufuku <br/> La blanking formed substantially parallel to and equally spaced to the face surface of the head of the golf club along the face grooves on the sole, the face grooves than smaller cross-section smaller groove more than the face groove While forming these small grooves
Provided intersecting, and the left and right sides of the face
Small grooves are formed densely, and at the center of the face surface,
A Gorufukura blanking, characterized in that the small grooves are formed on the rough, it is possible to impart the spin by the small grooves not only the face grooves on the golf ball at the time of the shot. In addition, golf shot from sweet spot at the time of shot
The golf ball has the proper spin
Given, you can modify the flight direction.

The present invention also relates to a golf club for connecting shafts.
Cut by a cutting tool to face the club head body, in the manufacturing method of Gorufukura Bed finishing the face after this Migaku Ken to a flat, cutting of the cutting tool
A mark is provided on the face surface so as to intersect,
The cutting traces are densely formed on both the left and right sides of the ground surface,
The cutting trace in the central portion of the face surface is formed rough, when finish flat the face Migaku Ken to manufacture a Gorufukura blanking characterized by polishing to leave a cutting mark by the cutting tool Intersects said face surface
The small groove formed by using the cutting trace can be easily formed.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 3 is a partially cutaway perspective view showing a first step showing one embodiment of the present invention.

FIG. 4 is a partially cutaway perspective view showing a second step showing one embodiment of the present invention.

FIG. 5 is a partially cutaway perspective view showing a third step showing one embodiment of the present invention.

FIG. 6 is a partially cutaway perspective view showing a fourth step of the embodiment of the present invention.

FIG. 7 is a partially cutaway perspective view showing a fifth step of the embodiment of the present invention.

[Description of Signs] 1 Head 1A Head main body 2 Shaft 3 Face surface 8 Face groove 9 10 Small groove 13 Cutting tool 14 15 Cutting mark 17 Buff

Claims (2)

(57) [Claims] 1. A golf club comprising a head and a shaft.
A face groove in the face surface of the head Te placed <br/> to Gorufukura blanking formed substantially parallel to and equally spaced along the sole, the face grooves than smaller cross-section smaller grooves so as to form more than the face groove , And cross these small grooves
And the small grooves are dense on both the left and right sides of the face
Is formed, and the small groove is rough at the center of the face surface.
Gorufukura Bed characterized in that it is formed. 2. A method face surface of the head body of the golf club for connecting the shaft to the cutting by a cutting tool, in the method of <br/> manufacturing Gorufukura Bed finishing the face after this Migaku Ken to the plane, wherein Crossing the cutting trace of the cutting tool
Provided on the face surface, and both right and left sides of the face surface
In the above, the cutting traces are densely formed, and the center of the face
The cutting trace in parts are formed on the rough, when finish flat the face Ken <br/> polishing to, manufacturing of Gorufukura blanking characterized by polishing to leave a cutting mark by the cutting tool <br/> Manufacturing method.