JP2012179275A - Method of manufacturing metal golf club head, and metal golf club head manufactured thereby - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of manufacturing metal golf club heads of all numbers by cutting a block of iron having a required height, width and length, and to provide metal golf club heads manufactured by the method.SOLUTION: The method of manufacturing metal golf club heads includes: a chucking step in which a block of iron having required height, width and length is chucked in a cutting machine; a cutting step in which the block of iron is three-dimensionally ground by a cutting machine; and a finishing step in which projections left in the preceding cutting step are removed. The invention includes: a manufacturing method which is capable of manufacturing metal golf club heads of all numbers by cutting from one block of iron; a manufacturing method of a metal block in a club head unit in which the block of iron is formed into a prescribed shape by any one method of casting, forging or extruding; and a means of manufacturing the metal golf club heads manufactured by the foregoing methods.

Description

  The present invention relates to a method for manufacturing a metal golf club head and a metal golf club head manufactured by the method.

  Conventionally, methods for manufacturing a metal golf club head include a casting method, a forging method, and a machining method using a machine tool.

  In the conventional casting method, mass production is possible and it is inexpensive, but there is a need for a mold frame for every production, and there is an internal defect (pinhole) when casting cast iron melted into the mold. As a result, mechanical properties such as overall strength and impact strength cannot be obtained sufficiently, and there are shape accuracy errors in the club specifications such as loft angle, lie angle, face angle, weight balance, etc. despite the same part number. It was necessary to adjust the loft angle and lie angle with the adjuster when used by tour professionals and advanced players.

  In addition, the conventional forging method has excellent feel and controllability because the metal structure is dense and stable, but it requires a forged mold frame and requires manual work and skill by the craftsman. Therefore, as in the case of casting, the same part number, but the shape accuracy error in the club specifications such as loft angle, lie angle, face angle, weight balance, etc. will appear, and it is necessary to adjust it for use by tour professionals and advanced users. It was necessary to adjust the loft angle and the lie angle with a vessel.

  On the other hand, the conventional machining method using a machine tool requires a lot of positioning time and cutting man-hours using a dedicated mounting jig in the process of chucking the material to the machine tool. The manufacturing cost was too high for mass production. Furthermore, in recent years when cavity irons are becoming mainstream, a high-performance cutting machine with advanced program control is required to cut deeply into the cavity on the back side of the face part, which is one factor contributing to pressure on manufacturing costs. ing.

  Therefore, an ultra-precision lost wax casting method that solves the above problems in the casting method has been developed, and mechanical finishing and surface treatment are required to improve the surface accuracy of the golf club head. This solves problems such as poor material yield.

  In addition, a “golf club head manufacturing method” (see Patent Document 1) manufactured by superplastic forming that solves the above-described problems in forging has been proposed.

  Furthermore, a “golf club head manufacturing method” (see Patent Document 2), which increases the chucking accuracy in head processing that solves the above-described problems in the machining method using a machine tool, has been proposed.

  However, the proposal of the above casting method and forging method requires polishing of the welding beat portion of each component part in a golf club head formed by mechanical modification processing and component configuration in a later process, and depends on the machine tool. In the machining method, it has not been possible to solve the problem that the number of machining steps by the machine tool cannot be reduced.

  In order to solve the above problems, the present inventor has developed a manufacturing method capable of manufacturing a golf club head of all counts by three-dimensional cutting of one iron ingot using a cutting machine. This leads to the proposal of a metal golf club head manufacturing method and a metal golf club head manufactured by the manufacturing method according to the present invention in which club specifications such as loft angle, lie angle, face angle, weight balance and the like can be freely set. is there.

JP-A-8-71186 Japanese Patent No. 2665720

  SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a manufacturing method capable of manufacturing all-numbered metal golf club heads from one iron ingot, and a metal golf club head manufactured by the manufacturing method. It is the purpose.

  To achieve the above object, the present invention provides a chucking process for chucking an iron ingot having a required height, width and length to a cutting machine, and three-dimensional cutting of the iron ingot with a cutting machine. A method for manufacturing a metal golf club head comprising: a cutting process to be performed; and a finishing process to remove protrusions (chucking parts) left in the previous cutting process, wherein cutting is performed from one iron ingot The manufacturing method which can manufacture metal golf club heads of all counts is adopted.

  Further, the present invention may employ a manufacturing method in which the iron ingot is a metal block in a club head unit formed into a predetermined shape by any one of casting, forging, and extrusion processes.

  Furthermore, the present invention provides a metal golf club head manufactured by the above manufacturing method.

  According to the method for manufacturing a metal golf club head according to the present invention, a mold frame by a casting method or a forged mold frame by a forging method is not required, and therefore the manufacturing cost can be reduced.

  Further, according to the metal golf club head manufacturing method of the present invention, the golf club head shape, loft angle, lie angle, face angle, weight balance, etc. can be changed by changing the cutting program of the cutting machine. The club specs can be finely set according to personal data.

  Furthermore, according to the method for manufacturing a metal golf club head according to the present invention, it is possible to manufacture a golf club head of all counts with a cutting machine with one iron ingot having a required height, width and length. It is.

  Furthermore, according to the method for manufacturing a metal golf club head according to the present invention, since the cutting process in the cutting machine is simultaneously processed by all milling, the loft angle, lie angle, face angle, weight balance, etc. of the same product number It is possible to provide a high-precision golf club head with almost no shape accuracy error in the manufacturing method of the club specifications, and exhibits an excellent effect that it is not necessary to adjust the loft angle and the lie angle by an adjuster.

  Furthermore, according to the method for manufacturing a metal golf club head according to the present invention, club specifications such as a loft angle, a lie angle, a face angle, and a weight balance based on the user's system and swing speed / track measurement data are provided. It has an excellent effect that an adjusted prototype can be easily produced.

  According to the method for manufacturing a metal golf club head according to the present invention, prototypes having different club specifications such as loft angle, lie angle, face angle, and weight balance can be easily manufactured. There is also an effect that you can try out the work.

  In addition, according to the metal golf club head manufactured by the manufacturing method according to the present invention, since it is possible to produce various types and small lots, it is possible to cope with a short-term model change.

  Furthermore, according to the golf club head manufactured by the manufacturing method according to the present invention, it is possible to obtain an excellent effect that inscriptions such as design characters and logo marks can be processed freely and easily.

It is explanatory drawing which shows embodiment of the iron lump of the metal golf club head concerning this invention. Example 1 It is explanatory drawing which shows embodiment of the iron lump of the metal golf club head concerning this invention. (Example 2) It is explanatory drawing which shows embodiment of the dimension measurement of the metal golf club head concerning this invention. (Example 3) It is explanatory drawing which shows embodiment of the angle setting of the metal golf club head concerning this invention. Example 4 It is explanatory drawing which shows the manufacturing process of the metal golf club head concerning this invention. (Example 5)

  The present invention provides a chucking process for chucking an iron ingot having a required height, width and length to a cutting machine, a cutting process for three-dimensionally cutting the iron ingot with a cutting machine, A finishing method for removing protrusions (chucking portions) left in a cutting process, and a method for manufacturing a metal golf club head, wherein a metal golf ball of all counts is cut by cutting from one iron ingot The biggest feature is that the club head can be manufactured. DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a metal golf club head manufacturing method according to the present invention and a metal golf club head manufactured by the manufacturing method will be described in detail with reference to the drawings.

  Note that the present invention is not particularly limited to the following embodiments, such as shape and dimensions, and can be arbitrarily changed without departing from the gist of the technical idea of the present invention.

FIG. 1 shows an embodiment of an iron ingot 2 of a metal golf club head 1 according to the present invention, and FIG. 1 (a) is an explanatory view showing that the metal golf club head 1 is manufactured from the iron ingot 2. FIG. 1B is an explanatory view showing a plurality of types of metal golf club heads 1 manufactured from one iron ingot 2.
The iron ingot 2 in the method for manufacturing a metal golf club head 1 according to the present invention has the required height, width and length, and the metal golf club of all counts is cut from one iron ingot 2 by machining. The head 1 can be manufactured.

  The shape of the iron ingot 2 is desirably a metal block 3 in club head units formed into a predetermined shape by any method of casting, forging or extrusion as shown. The specific shape of the metal block 3 is not particularly limited. For example, a substantially U-shaped metal block having a protruding portion 4 (chucking portion) at a part (predetermined location on the face surface). 3 can be used. Further, in order to increase the cutting efficiency, by forming the club head in units of the loft angle θ1, the cutting amount in the cutting step 20 can be reduced, and a shape that can be processed in a short time can be obtained.

FIG. 2 is an explanatory view showing an embodiment of the iron ingot 2 of the metal golf club head 1 according to the present invention, which is different from the first embodiment.
In other words, unlike the first embodiment in which the metal block 3 is substantially U-shaped, the metal block 3 has a face portion 5 having a predetermined thickness and is slightly larger than the metal golf club head 1. A mode in which the club block is made of the metal block 3 may be employed. At this time, since the face portion 5 has a predetermined thickness, it is possible to manufacture a plurality of types of metal golf club heads 1 having different loft angles θ 1 from one metal block 3.

  In addition, about the position which provides the projection part 4 (chucking part), although the drawing has shown the aspect which has the projection part 4 (chucking part) in two places, the upper side of the face part 5, and a lower side, it is the same as Example 1. There may be a mode in which the protrusion 4 (chucking portion) is provided at a predetermined location on the face surface, and there is no particular limitation.

FIG. 3 is an explanatory view showing an embodiment of dimensioning of the metal golf club head 1 of the present invention. FIG. 3 (a) is a side view of the dimensioning, and FIG. 3 (b) is the dimensioning. FIG. 3C is a front view showing a top view of the dimensioning.
The ingot 2 is a metal block 3 in a club head unit that is formed into a predetermined shape by any of casting, forging, and extrusion processes, and has a chucking projection 4 (chucking portion). A letter-shaped plate material is used. The flat plate portion of the iron ingot 2 corresponds to the face portion 5 and the sole portion 7, the projection portion 4 corresponds to the chucking portion, and the diagonally rising portion corresponds to the hosel portion 6 and is dimensioned.

  The material of the iron block 2 and the metal block 3 is not particularly limited, but is mainly manufactured from materials such as soft iron, 20C, 25C, SS400, stainless steel, titanium, and titanium alloy.

  Further, if the iron block 2 and the metal block 3 are molded in the shape of the club head in units of loft angles in order to increase the cutting efficiency, the amount of cutting can be reduced and processing can be performed in a short time.

FIG. 4 is an explanatory view showing an embodiment of the angle setting of the metal golf club head 1 according to the present invention. FIG. 4 (a) is a side view of measuring the loft angle θ1, and FIG. 4 (b) is a line drawing. A dimensioned front view of the angle θ2 and FIG. 4C show a dimensioned top view of the face angle θ3.
The flat plate portion of the iron ingot 2 corresponds to the loft angle θ1, the protruding portion 4 corresponds to the chucking portion 11, and the oblique rising portion corresponds to the lie angle θ2 and the face angle θ3. , Each angle is taken.

  Since the iron ingot 2 is processed simultaneously by three-dimensional cutting with a cutting machine, it is possible to manufacture a club head with high relative angle accuracy such as loft angle θ1, lie angle θ2, face angle θ3, and weight balance. is there.

FIG. 5 is an explanatory view showing a manufacturing process of the metal golf club head 1 according to the present invention.
The method for manufacturing a metal golf club head 1 according to the present invention includes an iron block 2 having a required height, width, and length, and a metal block 3 of a club head unit formed in a predetermined shape as a cutting machine. A chucking step 10 for chucking, a cutting step 30 for three-dimensionally cutting the iron ingot 2 with a cutting machine, and a finishing step 40 for removing the protrusion 4 (chucking portion) left in the previous step, Consists of.

  The chucking step 10 is to chuck the protrusion 4 of the metal block 3 having the protrusion 4 (chucking portion) in part with a chuck portion of a cutting machine. In addition, in the drawing, a case where a substantially U-shaped metal block 3 is used as the metal block 3 is shown.

  In the cutting step 20, the face portion 5, the sole portion 7, the crown portion 8 and the hosel portion 6 are processed with a cutting tool 21 such as an end mill in the order of rough cutting → finish cutting → polishing cutting → polishing finish processing, and then the shaft is placed on the hosel portion 6. After the screw hole 9 connected to the part is drilled with a drill, it is threaded, and if necessary, the sole part 7 and the crown part 8 are engraved with a sculpture drill and finished.

  In the finishing step 30, a part of the face portion 5 and the crown portion 8 is changed by the chuck portion 11 from the protrusion portion 4 of the metal block 3, and the remaining protrusion portion 4 (chucking portion) of the metal block 3 is removed. . After that, a score line is cut on the face portion 5 and deburred and polished to finish.

  Thereafter, the surface of the processed metal golf club head 1 is subjected to chrome plating, characters and the like are entered, and a final quality inspection is performed to obtain a finished product.

  A method for manufacturing a metal golf club head according to the present invention and a metal golf club head manufactured by the manufacturing method include producing a golf club head of all counts by three-dimensionally cutting one iron ingot using a cutting machine. Therefore, it is understood that the club specifications such as the count and the loft angle, the lie angle, the face angle, and the weight balance can be freely set, and the industrial applicability of the present invention is extremely high.

DESCRIPTION OF SYMBOLS 1 Metal golf club head 2 Iron block 3 Metal block 4 Protrusion part 5 Face part 6 Hosel part 7 Sole part 8 Crown part 9 Screw hole 10 Chucking process 11 Chuck part 20 Cutting process 21 Cutting tool 30 Finishing process (theta) 1 Loft angle θ2 Lie angle θ3 Face angle

  The present invention relates to a method for manufacturing a metal golf club head and a metal golf club head manufactured by the method.

  Conventionally, methods for manufacturing a metal golf club head include a casting method, a forging method, and a machining method using a machine tool.

  In the conventional casting method, mass production is possible and it is inexpensive, but there is a need for a mold frame for every production, and there is an internal defect (pinhole) when casting cast iron melted into the mold. As a result, mechanical properties such as overall strength and impact strength cannot be obtained sufficiently, and there are shape accuracy errors in the club specifications such as loft angle, lie angle, face angle, weight balance, etc. despite the same part number. It was necessary to adjust the loft angle and lie angle with the adjuster when used by tour professionals and advanced players.

  In addition, the conventional forging method has excellent feel and controllability because the metal structure is dense and stable, but it requires a forged mold frame and requires manual work and skill by the craftsman. Therefore, as in the case of casting, the same part number, but the shape accuracy error in the club specifications such as loft angle, lie angle, face angle, weight balance, etc. will appear, and it is necessary to adjust it for use by tour professionals and advanced users. It was necessary to adjust the loft angle and the lie angle with a vessel.

  On the other hand, the conventional machining method using a machine tool requires a lot of positioning time and cutting man-hours using a dedicated mounting jig in the process of chucking the material to the machine tool. The manufacturing cost was too high for mass production. Furthermore, in recent years when cavity irons are becoming mainstream, a high-performance cutting machine with advanced program control is required to cut deeply into the cavity on the back side of the face part, which is one factor contributing to pressure on manufacturing costs. ing.

  Therefore, an ultra-precision lost wax casting method that solves the above problems in the casting method has been developed, and mechanical finishing and surface treatment are required to improve the surface accuracy of the golf club head. This solves problems such as poor material yield.

  In addition, a “golf club head manufacturing method” (see Patent Document 1) manufactured by superplastic forming that solves the above-described problems in forging has been proposed.

  Furthermore, a “golf club head manufacturing method” (see Patent Document 2), which increases the chucking accuracy in head processing that solves the above-described problems in the machining method using a machine tool, has been proposed.

  However, the proposal of the above casting method and forging method requires polishing of the welding beat portion of each component part in a golf club head formed by mechanical modification processing and component configuration in a later process, and depends on the machine tool. In the machining method, it has not been possible to solve the problem that the number of machining steps by the machine tool cannot be reduced.

  In order to solve the above problems, the present inventor has developed a manufacturing method capable of manufacturing a golf club head of all counts by three-dimensional cutting of one iron ingot using a cutting machine. This leads to the proposal of a metal golf club head manufacturing method and a metal golf club head manufactured by the manufacturing method according to the present invention in which club specifications such as loft angle, lie angle, face angle, weight balance and the like can be freely set. is there.

JP-A-8-71186 Japanese Patent No. 2665720

SUMMARY OF THE INVENTION In view of the above problems, the present invention provides a manufacturing method capable of manufacturing all-numbered metal golf club heads from one metal block, and a metal golf club head manufactured by the manufacturing method. It is intended.

In order to achieve the above object, the present invention provides a cutting machine for forming a metal block having a required height, width, and length, which is formed into a substantially U shape by extrusion and cut into club head units. A metal golf club comprising: a chucking process for chucking the metal block ; a cutting process for three-dimensionally cutting the metal block with a cutting machine; and a finishing process for removing the protrusions left in the previous process. A method of manufacturing a head, which can manufacture a metal golf club head of all counts from one metal block by cutting.

  Furthermore, the present invention provides a metal golf club head manufactured by the above manufacturing method.

  According to the method for manufacturing a metal golf club head according to the present invention, a mold frame by a casting method or a forged mold frame by a forging method is not required, and therefore the manufacturing cost can be reduced.

  Further, according to the metal golf club head manufacturing method of the present invention, the golf club head shape, loft angle, lie angle, face angle, weight balance, etc. can be changed by changing the cutting program of the cutting machine. The club specs can be finely set according to personal data.

Furthermore, according to the method for manufacturing a metal golf club head according to the present invention, the golf club head of all counts can be manufactured by a cutting machine with one metal block having the required height, width and length. Is possible.

  Furthermore, according to the method for manufacturing a metal golf club head according to the present invention, since the cutting process in the cutting machine is simultaneously processed by all milling, the loft angle, lie angle, face angle, weight balance, etc. of the same product number It is possible to provide a high-precision golf club head with almost no shape accuracy error in the manufacturing method of the club specifications, and exhibits an excellent effect that it is not necessary to adjust the loft angle and the lie angle by an adjuster.

  Furthermore, according to the method for manufacturing a metal golf club head according to the present invention, club specifications such as a loft angle, a lie angle, a face angle, and a weight balance based on the user's system and swing speed / track measurement data are provided. It has an excellent effect that an adjusted prototype can be easily produced.

  According to the method for manufacturing a metal golf club head according to the present invention, prototypes having different club specifications such as loft angle, lie angle, face angle, and weight balance can be easily manufactured. There is also an effect that you can try out the work.

  In addition, according to the metal golf club head manufactured by the manufacturing method according to the present invention, since it is possible to produce various types and small lots, it is possible to cope with a short-term model change.

  Furthermore, according to the golf club head manufactured by the manufacturing method according to the present invention, it is possible to obtain an excellent effect that inscriptions such as design characters and logo marks can be processed freely and easily.

It is explanatory drawing which shows embodiment of the iron lump of the metal golf club head concerning this invention. Example 1 It is explanatory drawing which shows embodiment of the dimension measurement of the metal golf club head concerning this invention. ( Example 2 ) It is explanatory drawing which shows embodiment of the angle setting of the metal golf club head concerning this invention. ( Example 3 ) It is explanatory drawing which shows the manufacturing process of the metal golf club head concerning this invention. ( Example 4 )

The present invention includes a chucking process for chucking a metal block having a required height, width and length to a cutting machine, a cutting process for three-dimensionally cutting the metal block with a cutting machine, A finishing process for removing protrusions (chucking parts) left in a previous cutting process, and a method for manufacturing a metal golf club head, wherein all counts are cut from one metal block by cutting The greatest feature is that a metal golf club head can be manufactured. DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a metal golf club head manufacturing method according to the present invention and a metal golf club head manufactured by the manufacturing method will be described in detail with reference to the drawings.

  Note that the present invention is not particularly limited to the following embodiments, such as shape and dimensions, and can be arbitrarily changed without departing from the gist of the technical idea of the present invention.

FIG. 1 shows an embodiment of a metal block 3 of a metal golf club head 1 according to the present invention. FIG. 1 (a) shows that the metal golf club head 1 is manufactured from the metal block 3. FIG. 1B is an explanatory view showing a plurality of types of metal golf club heads 1 manufactured from one metal block 3 .
The metal block 3 in the method for manufacturing the metal golf club head 1 according to the present invention has the required height, width and length, and is made of all the counts of metal by cutting from one metal block 3 . The golf club head 1 can be manufactured.

As shown in the figure, the metal block 3 is formed in a substantially square shape by an extrusion method and is cut into club head units. The specific shape of the metal block 3 is a shape having a protrusion 4 (chucking portion) at a part of a substantially U-shape (for example, a predetermined location on the face surface). Further, in order to increase the cutting efficiency, by forming the club head in units of the loft angle θ1, the cutting amount in the cutting step 20 can be reduced, and a shape that can be processed in a short time can be obtained.

FIG. 2 is an explanatory view showing an embodiment of dimensioning of the metal golf club head 1 of the present invention . FIG. 2 (a) is a side view of the dimensioning, and FIG. 2 (b) is the dimensioning. A front view and FIG. 2 (c) show a top view of the dimension measurement.
The metal block 3 is formed into a substantially U shape by an extrusion method, and is cut by a club head unit, and a plate-like material having a chucking projection 4 (chucking portion) is used. It is done. The flat plate portion of the metal block 3 corresponds to the face portion 5 and the sole portion 7, the projection portion 4 corresponds to the chucking portion, and the oblique rising portion corresponds to the hosel portion 6 and is dimensioned.

The material of the metal block 3 is not particularly limited, but is mainly manufactured from soft iron, 20C, 25C, SS400, stainless steel, titanium, titanium alloy, or the like.

Further, when the metal block 3 is molded in the shape of the club head in the loft angle unit in order to increase the cutting efficiency, the cutting amount can be reduced and the metal block 3 can be processed in a short time.

FIG. 3 is an explanatory view showing an embodiment of the angle setting of the metal golf club head 1 according to the present invention . FIG. 3 (a) is a side view of dimensioning of the loft angle θ1, and FIG. 3 (b) is a line drawing. A dimensioned front view of the angle θ2, FIG. 3C shows a dimensioned top view of the face angle θ3.
The flat plate portion of the metal block 3 corresponds to the loft angle θ1, the protrusion 4 corresponds to the chucking portion 11, and the oblique rising portion corresponds to the lie angle θ2 and the face angle θ3. In addition, each angle is taken.

Since the metal block 3 is simultaneously processed by a three-dimensional cutting process using a cutting machine, it is possible to manufacture a club head with high relative angle accuracy such as loft angle θ1, lie angle θ2, face angle θ3, and weight balance. It is.

FIG. 4 is an explanatory view showing a manufacturing process of the metal golf club head 1 according to the present invention.
A manufacturing method of a metal golf club head 1 according to the present invention includes a chucking step 10 for chucking a metal block 3 of a club head unit having a required height, width and length to a cutting machine, It comprises a cutting step 30 for three-dimensionally cutting the metal block 3 with a cutting machine, and a finishing step 40 for removing the protrusion 4 (chucking portion) left in the previous step.

The chucking step 10 is to chuck the protrusion 4 of the metal block 3 having the protrusion 4 (chucking portion) in part with a chuck portion of a cutting machine. Note that, as shown in the drawings, using a shaped metallic block 3 to approximately.

  In the cutting step 20, the face portion 5, the sole portion 7, the crown portion 8 and the hosel portion 6 are processed with a cutting tool 21 such as an end mill in the order of rough cutting → finish cutting → polishing cutting → polishing finish processing, and then the shaft is placed on the hosel portion 6. After the screw hole 9 connected to the part is drilled with a drill, it is threaded, and if necessary, the sole part 7 and the crown part 8 are engraved with a sculpture drill and finished.

  In the finishing step 30, a part of the face portion 5 and the crown portion 8 is changed by the chuck portion 11 from the protrusion portion 4 of the metal block 3, and the remaining protrusion portion 4 (chucking portion) of the metal block 3 is removed. . After that, a score line is cut on the face portion 5 and deburred and polished to finish.

  Thereafter, the surface of the processed metal golf club head 1 is subjected to chrome plating, characters and the like are entered, and a final quality inspection is performed to obtain a finished product.

The method for manufacturing a metal golf club head of the present invention and the metal golf club head manufactured by the manufacturing method produce a golf club head of all counts by three-dimensionally cutting one metal block 3 using a cutting machine. Therefore, it is understood that the club specifications such as the count and loft angle, lie angle, face angle, weight balance, etc. can be freely set, and the industrial applicability of the present invention is extremely high.

DESCRIPTION OF SYMBOLS 1 Metal golf club head 3 Metal block 4 Protrusion part 5 Face part 6 Hosel part 7 Sole part 8 Crown part 9 Screw hole 10 Chucking process 11 Chuck part 20 Cutting process 21 Cutting tool 30 Finishing process θ1 Loft angle θ2 Lie angle θ3 Face angle

Claims (3)

  A chucking process for chucking an iron ingot having a required height, width and length to a cutting machine, a cutting process for three-dimensionally cutting the iron ingot with a cutting machine, and the remaining in the previous process A metal golf club head manufacturing method comprising: a finishing step for removing protrusions, wherein a metal golf club head of all counts can be manufactured by cutting from one iron ingot. A method for manufacturing a metal golf club head.   2. The method of manufacturing a metal golf club head according to claim 1, wherein the iron ingot is a metal block in a club head unit formed into a predetermined shape by any one of casting, forging, and extrusion processes. .   A metal golf club head manufactured by the manufacturing method according to claim 1 or 2.