JP2007319344A - Golf club head and method of manufacturing golf club head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain requested backspin, fix the path of a ball and stabilize the carry and the stoppage of the ball on a green even if the face is wet with water because turf, the ball or the like is wet, and even if the turf or grass adheres to the face. <P>SOLUTION: The golf club head 10 has fine bumps 17 having a prescribed height which are formed on the face 11 in a prescribed pattern. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a golf club head and a method for manufacturing a golf club head.

Conventionally, it has been known that the backspin amount of a hit ball greatly changes the trajectory of the ball, and has a great influence on the hit distance, hit direction, hit ball stability, easiness of stopping, especially on the green. It has been.
For this reason, a conventional golf club head has been proposed in which a face line groove is formed on the face surface in order to obtain a desired backspin amount (see, for example, Patent Document 1).
JP 9-192274 A

  By the way, in the conventional golf club head formed with the face line groove, when the turf or the ball is dry (in the dry state), a desired backspin amount can be obtained, but the turf or the ball is wet and the face is wet. Under circumstances where water is attached to the face or where the face is attached to turf or grass (hereinafter simply referred to as a wet state), turf or water intervenes between the face surface and the ball. However, the intended amount of backspin could not be obtained, and as a result, there was a problem that a large variation occurred in the distance of the ball and the stopping condition in the green.

  Therefore, the object of the present invention is to obtain a desired backspin amount even when the turf, the ball, etc. are wet, to make the ball trajectory constant, to adjust the ball flight distance, the green stop condition, etc. An object of the present invention is to provide a golf club head that can be made stable and a method of manufacturing the golf club head.

In order to solve the above-described problems, the golf club head is characterized in that a minute ridge having a predetermined height is formed in a predetermined pattern on the face surface.
According to the above configuration, even if the ridges or balls get wet and the face surface is covered with water or the face surface has turf or grass, etc. And a desired amount of backspin can be obtained.

In this case, the micro ridge may have a semi-cylindrical cross section.
Further, a valley may be provided along and adjacent to the minute ridge.
According to the above configuration, the effect of under the circumstances where the micro ridges and valleys work together and the turf and balls get wet and the face is wet, or the face is turf and grass And a desired amount of backspin can be obtained.

In this case, the height difference between the bottom of the valley and the top of the minute ridge may be in the range of 2 to 300 μm.
More preferably, the difference in height between the bottom of the valley and the top of the minute ridge is in the range of 2 to 90 μm.
Further, the pattern may be formed in a straight line shape, a broken line shape, a zigzag shape, a curved shape, a lattice shape, a tile shape, or a spot shape.

In addition, a plurality of face line grooves having a predetermined depth are formed on the face surface, and the minute ridges are arranged between the face line grooves and substantially parallel to the face line grooves. It may be.
Furthermore, a plurality of the micro ridges may be arranged between two adjacent face line grooves.
The minute ridges may be formed in a saw blade shape in plan view.
Furthermore, the minute ridges may be formed by laser processing, electrolytic processing, electrolytic polishing, electrolytic etching, photoetching, or three-dimensional electroforming.

  Further, the method for manufacturing a golf club head includes a pattern setting process for setting a formation pattern of a minute ridge having a predetermined height to be formed on the face surface of the golf club head, laser processing, electrolytic processing, electrolytic polishing, And a micro-bulge forming process for forming the micro-bulge in a predetermined pattern on the face surface by electrolytic etching, photoetching or three-dimensional electroforming.

  In addition, the golf club head manufacturing method includes a pattern for setting a micro ridge having a predetermined height to be formed on the face surface of the golf club head and a formation pattern of a valley portion adjacently disposed along the micro ridge. A setting process and a forming process of forming the micro-bulges and the valleys in a predetermined pattern on the face surface by laser processing, electrolytic processing, electrolytic polishing, electrolytic etching, photoetching or three-dimensional electroforming. It is characterized by having prepared.

  According to the present invention, it is possible to suppress a decrease in the amount of backspin even under conditions where the turf, balls, etc. are wet and the face surface is wet, or even when the face surface is attached with turf, grass, etc. A backspin amount equivalent to the backspin amount obtained when the grass and the ball are dry can be obtained. As a result, the ball control can be easily performed.

Next, preferred embodiments of the present invention will be described with reference to the drawings.
[1] First Embodiment FIG. 1 is an external front view of a golf club head (iron) according to an embodiment.
The golf club head 10 has a face surface 11, a sole surface 12 that constitutes the bottom surface of the golf club head 10, and a hosel having a shaft hole 14 that extends from the heel 13 side of the face surface 11 at a predetermined angle to insert and bond a shaft. 15.
Here, examples of the material of the golf club head 10 include stainless steel (for example, SUS304), titanium alloy, soft iron, aluminum alloy, magnesium alloy, brass, and gun metal.

The face surface 11 is provided with a plurality of face line grooves 16 and a plurality of minute raised portions 17 arranged in parallel with the face line grooves 16. In FIG. 1, for easy understanding, the face line groove 16 is indicated by a solid line, and the minute ridge 17 is indicated by a broken line.
The face line groove 16 is provided in a substantially horizontal direction in a reference state in which the head 1 is placed on a horizontal plane at a predetermined lie angle and loft angle, and is also arranged in a direction substantially along the leading edge 18. Has been. Further, the face line groove 16 is provided in a substantially central region of the face surface 11. Further, the face line grooves 16 are arranged at a predetermined pitch P.

FIG. 2 is a partially enlarged view of the AA cross section of FIG.
As shown in FIG. 2, the minute ridges 17 are provided between the face line grooves 16 in parallel with the face line grooves 16. That is, in the first embodiment, the minute ridges 17 are arranged in a line (straight line).
The cross-sectional shape of the face line groove 16 is bilaterally symmetric, and the cross-sectional shapes of all the face line grooves 16 are the same.

FIG. 3 is an enlarged perspective view of the vicinity of the minute ridge in the AA cross section of FIG. 1. FIG. 4 is an enlarged plan view in the vicinity of the minute ridges.
As shown in FIG. 3, a valley portion 21 is provided in parallel with and adjacent to the minute ridge portion 17.
The height difference Δh between the minute ridges 17 and the valleys 21 is set to 2 to 300 μm, and more preferably 2 to 90 μm. In this case, the height difference [Delta] h is set to 2 to 300 [mu] m because when it is less than 2 [mu] m and greater than 300 [mu] m, only the same effect as when the minute ridges 17 and valleys 21 are not provided can be obtained. More preferably, the thickness is set to 2 to 90 μm because the amount of decrease in the backspin amount in the wet state is smaller within this range.

  In addition, the width (groove width) W between the micro ridges 17 is set to 70 to 300 μm. In this case, the reason why the width W is set to 70 to 300 μm is that, when the width W is less than 70 μm and greater than 300 μm, only the same effect as the case where the minute ridges 17 and the valleys 21 are not provided can be obtained.

FIG. 5 is an explanatory diagram of a schematic configuration of the laser processing system.
The laser processing system 30 is provided with a controller 31 for controlling the entire laser processing system 30 and a jig 32 for holding the golf club head 10P before processing, and can be driven in the X and Y directions. Y table 33, XY driver 34 for driving XY table 33 under the control of controller 31, laser unit 35 for outputting pulsed laser light, and laser unit 35 under the control of controller 31 A laser driver 36, an operation unit 37 for an operator as a user to perform various operations, and a display 38 for displaying various information.
Here, as the laser unit 35, a carbon dioxide laser device, a YAG laser device, or the like is applicable.

Next, the processing procedure will be described.
First, the operator fixes the golf club head 10P with a jig 32 in a predetermined direction. In FIG. 5, description will be made assuming that the extending direction of the face line groove 16 is the Y direction.
Subsequently, the operator operates the operation unit 37 to read data corresponding to the golf club head 10P from an external storage device (not shown) of the controller 31 to display various information on the display 38 and to instruct processing start. Prompt for

  Accordingly, when the operator inputs a machining start instruction, the controller 31 controls the XY driver 34 and drives the XY table 33 so that the irradiation position of the pulse laser beam of the laser unit 35 is a predetermined value. The golf club head 10P is moved so as to be the processing start position.

Subsequently, the controller 31 drives the laser unit 35 via the laser driver 36 to output pulsed laser light, and a hole for forming the trough portion 21 is formed with the position T1 in FIG. 4 as the center position, for example. I can make it. At this time, the periphery of the hole rises, and the minute ridges 17 are formed. The pulse laser beam output at this time is preferably about 5 to 25 W.
The laser operation speed is preferably about 100 to 2000 mm / sec.

When the output of the pulse laser beam is completed, the controller 31 controls the XY driver 34 to move the XY table 33 by a predetermined amount in the Y direction, and this time, with the position T2 in FIG. Similarly, a hole for forming the valley 21 is made. As a result, the hole formed last time and the hole formed this time are connected to form a continuous minute ridge 17 and a continuous valley 21. At this time, the minute ridges 17 are formed in a saw blade shape in plan view as shown in FIGS. 3 and 4.
Hereinafter, similarly, by shifting the irradiation position of the pulse laser beam, the minute ridges 17 and the valleys 21 continuously extending in a line shape are formed, and the Y direction (the extending direction of the face line groove 16) is formed. ) To a predetermined length.

Subsequently, the controller 31 controls the XY driver 34 to drive the XY table 33 and move it by a predetermined amount in the X direction to the formation start position of the next minute ridge 17. In the Y direction, the golf club head 10 </ b> P is moved so that the pulse laser beam irradiation position of the laser unit 35 becomes the next formation start position of the micro-protrusion 17.
In the same manner, one trough portion 21 and thus two minute ridges 17 are formed between the face line grooves 16 one by one.

FIG. 6 is an explanatory diagram of the effect of the first embodiment.
FIG. 6 shows the backspin amount (rpm) of the ball obtained when the ball is incident on the face surface 11 of the golf club head 10 at a predetermined speed VIX (corresponding to the swing speed of the golf club). .
In FIG. 6, the rhombus mark (♦) represents the backspin amount obtained in a dry state in which only the face line groove 16 is formed on the face surface 11.
On the other hand, in FIG. 6, the triangular mark (Δ) forms the face line groove 16 and the minute ridges 17 and valleys 21 of the first embodiment on the face surface 11, and the back spin amount obtained in the wet state It is.

In FIG. 6, a circle mark (●) represents the backspin amount obtained by forming the face line groove 16 and irregularities by the shot peening method on the face surface 11 and in a wet state.
As can be seen from these, according to the minute bulging portion 17 and the valley portion 21 of the present embodiment, it is possible to suppress a decrease in the amount of backspin even in the wet state, and only the face line groove 16 is formed on the face surface 11. The backspin amount equivalent to the backspin amount obtained in the dry state can be obtained, and as a result, the ball control can be easily performed.

[2] Second Embodiment In the first embodiment, the laser unit that emits pulsed laser light has been described. However, in the second embodiment, the laser unit emits continuous laser light. It is a form.
FIG. 7 is an enlarged perspective view of the vicinity of the minute bulging portion of the second embodiment in a section corresponding to the section AA of FIG.
As shown in FIG. 7, a valley portion 21 is provided in parallel with and adjacent to the minute bulging portion 17 </ b> A.

Here, the two minute ridges 17 </ b> A facing each other across the valley 21 are formed substantially in parallel.
Also in this case, the height difference Δh between the minute raised portion 17A and the valley portion 21 is set to 2 to 300 μm, more preferably 2 to 90 μm, similarly to the first embodiment.
In addition, the width (groove width) W between the minute raised portions 17A is set to 70 to 300 μm.
Also in the second embodiment, the backspin amount can be suppressed from being reduced even in the wet state, and the backspin amount equivalent to the backspin amount obtained in the dry state when only the face line groove 16 is formed on the face surface. The amount can be obtained, and as a result, the ball can be controlled easily.

[3] Third Embodiment In each of the above-described embodiments, both the minute ridges and the valleys are formed on the face surface. However, in the third embodiment, only the minute ridges are formed. This is an embodiment.

FIG. 8 is an enlarged perspective view of the vicinity of the minute bulge portion of the third embodiment in a cross section corresponding to the cross section AA of FIG. 1.
As shown in FIG. 8, the micro ridge 17B has a semi-cylindrical cross section and is formed in parallel to a face line groove (not shown).
And the trough part 21 is provided adjacently.
Here, the two minute ridges 17 </ b> A facing each other across the valley 21 are formed substantially in parallel.

In this case, the height difference Δh <b> 1 with the face surface 11 of the minute raised portion 17 </ b> B is 3 to 150 μm, and more preferably 3 to 45 μm.
Also according to the third embodiment, the backspin amount can be suppressed from decreasing even in the wet state, and the backspin amount equivalent to the backspin amount obtained in the dry state when only the face line groove 16 is formed on the face surface. The amount can be obtained, and as a result, the ball can be controlled easily.

[4] Fourth Embodiment In each of the above embodiments, the case where one minute ridge is disposed between the face line grooves has been described. However, in the fourth embodiment, the two adjacent face lines are provided. This is an embodiment when a plurality of grooves are arranged between the grooves.

FIG. 9 is a partially enlarged view of the fourth embodiment of a cross section corresponding to the AA cross section of FIG. 1.
As shown in FIG. 9, a plurality (two in FIG. 9) of the micro ridges 17 are provided between the face line grooves 16 in parallel with the face line grooves 16.
Also in the fourth embodiment, the back spin amount can be suppressed from being reduced even in the wet state as in the above embodiments, and the back obtained in the dry state when only the face line groove 16 is formed on the face surface. A back spin amount equivalent to the spin amount can be obtained, and as a result, ball control can be easily performed.

[5] Fifth Embodiment In each of the above embodiments, the minute ridges are arranged almost linearly. However, in the fifth embodiment, the minute ridges (and valleys are provided). , Troughs) is an embodiment in which zigzags are arranged.

FIG. 10 is an external front view of a golf club head (iron) according to a fifth embodiment.
The golf club head 10 </ b> A has a face surface 11, a sole surface 12 that forms the bottom surface of the golf club head 10, and a hosel having a shaft hole 14 that extends from the heel 13 side of the face surface 11 at a predetermined angle to insert and bond a shaft. 15.
The face surface 11 includes a plurality of face line grooves 16 arranged at a predetermined pitch, and a plurality of micro ridges 17C (and valleys 21A as necessary) arranged in a zigzag manner between the face line grooves 16, Is provided.

Also in the fifth embodiment, the back spin amount can be suppressed from decreasing even in the wet state as in the above embodiments, and the back obtained in the dry state when only the face line groove 16 is formed on the face surface. A back spin amount equivalent to the spin amount can be obtained, and as a result, ball control can be easily performed.
Also in the fifth embodiment, similarly to the fourth embodiment, it is possible to provide a plurality of minute ridges 17C (and valleys 21A as necessary) between the face line grooves 16.

[6] Sixth Embodiment In each of the above embodiments, the micro ridges are arranged in a line, but in the sixth embodiment, a plurality of micro ridges having a short length are arranged in parallel. This is an embodiment in the case of being arranged as a tile-shaped or spot-shaped minute ridge as a whole.

FIG. 11 is an external front view of a golf club head (iron) according to a sixth embodiment.
The golf club head 10B has a hosel having a face surface 11, a sole surface 12 constituting the bottom surface of the golf club head 10, and a shaft hole 14 extending from the heel 13 side of the face surface 11 at a predetermined angle to insert and bond a shaft. 15.
The face surface 11 includes a plurality of face line grooves 16 arranged at a predetermined pitch, and a plurality of minute raised parts 17D (and valley parts 21B as necessary) arranged in a tile shape between the face line grooves 16, Is provided.

In the sixth embodiment as well, the back spin amount can be suppressed from being reduced even in the wet state as in the above embodiments, and the back obtained in the dry state when only the face line groove 16 is formed on the face surface. A back spin amount equivalent to the spin amount can be obtained, and as a result, ball control can be easily performed.
Also in the sixth embodiment, similarly to the fourth embodiment, a plurality of minute raised portions 17D (and valleys 21B as necessary) can be provided in parallel between the face line grooves 16. is there.

[7] Seventh Embodiment In each of the above embodiments, laser processing is used as a processing method for forming a minute ridge, but electrolytic processing, electrolytic polishing, electrolytic etching, photoetching, or three-dimensional electroforming is used. It is also possible to configure so as to form.

[8] Modification of Embodiment In the above description, the face line groove is provided on the face surface. However, a minute ridge (or a valley if necessary) is provided without providing the face line groove. It is also possible to configure. Even in this case, the reduction amount of the backspin amount can be reduced.
In the above description, the case of using an iron as a golf club head has been described. However, the present invention can be similarly applied to a wood and a putter.

1 is an external front view of a golf club head (iron) according to an embodiment. It is a partially expanded view of the AA cross section of FIG. It is the perspective view which expanded the micro protuberance vicinity in the AA cross section of FIG. It is an enlarged plan view of the vicinity of a minute ridge. It is a schematic structure explanatory view of a laser processing system. It is explanatory drawing of the effect of 1st Embodiment. It is the perspective view which expanded the micro ridge part vicinity of 2nd Embodiment in the cross section corresponded to the AA cross section of FIG. It is the perspective view which expanded the micro ridge part vicinity of 3rd Embodiment in the cross section corresponded to the AA cross section of FIG. FIG. 9 is a partially enlarged view of the fourth embodiment of a cross section corresponding to the AA cross section of FIG. 1. It is an external appearance front view of the golf club head (iron) of 5th Embodiment. It is an external appearance front view of the golf club head (iron) of 6th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 10A ... Golf club head, 11 ... Face surface, 12 ... Sole surface, 13 ... Heel, 14 ... Shaft hole, 15 ... Hosel, 16 ... Face line groove, 17, 17A-17D ... Micro protuberance part, 21, 21A 21B ... Tanibe, 30 ... Laser processing system, 31 ... Controller, 32 ... Jig, 33 ... XY table, 34 ... XY driver, 35 ... Laser unit, 36 ... Laser driver, 37 ... Operation unit, 38 ... Display.

Claims (13)

  A golf club head, wherein a minute ridge having a predetermined height is formed in a predetermined pattern on a face surface. The golf club head according to claim 1,
2. The golf club head according to claim 1, wherein the micro ridge has a semi-cylindrical cross section. The golf club head according to claim 1,
A golf club head, wherein a trough is provided along and adjacent to the minute ridge. The golf club head according to claim 3, wherein
The golf club head according to claim 1, wherein a difference in height between the bottom of the valley and the top of the minute bulge is in the range of 2 to 300 μm. The golf club head according to claim 3, wherein
The golf club head according to claim 1, wherein a difference in height between the bottom of the valley and the top of the minute bulge is in the range of 2 to 90 μm. The golf club head according to any one of claims 1 to 5,
The golf club head according to claim 1, wherein the pattern is formed in a linear shape, a broken line shape, a zigzag shape, a curved shape, a lattice shape, a tile shape, or a spot shape. The golf club head according to any one of claims 1 to 6,
A plurality of face line grooves having a predetermined depth are formed on the face surface,
The golf club head according to claim 1, wherein the micro-protrusions are disposed between the face line grooves and substantially parallel to the face line grooves. In the golf club head according to claim,
The golf club head according to claim 1, wherein a plurality of the micro ridges are disposed between the two adjacent face line grooves. The golf club head according to claim 2, wherein
2. The golf club head according to claim 1, wherein the micro ridge is formed in a saw blade shape in plan view. The golf club head according to claim 1 or 2,
The golf club head according to claim 1, wherein the micro ridge is formed by laser processing, electrolytic processing, electrolytic polishing, electrolytic etching, photoetching, or three-dimensional electroforming. In the golf club head according to any one of claims 3 to 9,
2. The golf club head according to claim 1, wherein the valley and the minute bulge are formed by laser processing, electrolytic processing, electrolytic polishing, electrolytic etching, photoetching, or three-dimensional electroforming. A pattern setting process for setting a formation pattern of a minute ridge having a predetermined height to be formed on the face surface of the golf club head;
A micro-bulge formation process in which the micro-bulge is formed in a predetermined pattern on the face surface by laser processing, electrolytic processing, electropolishing, electrolytic etching, photoetching or three-dimensional electroforming;
A method of manufacturing a golf club head, comprising: A pattern setting process for setting a micro ridge having a predetermined height to be formed on a face surface of the golf club head and a formation pattern of a valley disposed adjacently along the micro ridge,
Forming the micro-protrusions and the valleys in a predetermined pattern on the face surface by laser processing, electrolytic processing, electrolytic polishing, electrolytic etching, photoetching or three-dimensional electroforming;
A method of manufacturing a golf club head, comprising:

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