JP2015119844A - Method for manufacturing metal golf club head, and metal golf club head manufactured by the manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a metal golf club head in which numerical values in club specifications such as a loft angle, a lie angle, a face angle, and a weight balance in all club numbers of iron clubs based on cutting work from one metal head original form molded body can be set by a machine tool, and to provide the metal golf club head manufactured by the manufacturing method.SOLUTION: A method for manufacturing a metal golf club head relating to the present invention comprises a metal mold forging step, a screw hole boring step, a face surface machining step, a cavity surface machining step, an overhang wing cutting step, and a finishing step. The metal golf club head relating to the present invention is manufactured through the steps.

Description

  The present invention is a metal golf golf club capable of numerically setting club specifications such as loft angle, lie angle, face angle, weight balance and the like in all iron clubs by cutting from a single metal head original mold. The present invention relates to a club head manufacturing method and a metal golf club head manufactured by the manufacturing method.

  Conventional metal golf club heads are mainly manufactured by a casting method using a mold, a forging method using a hammering method, and a machining method using a machine tool.

  In the casting method using a mold, mass production is possible and it is inexpensive, but it is necessary for each club count for manufacturing the mold frame, and when casting cast iron melted into the mold, internal defects (pinholes) are required. In addition, there is a problem that mechanical properties such as overall strength and impact strength cannot be obtained sufficiently, and club specifications such as loft angle, lie angle, face angle, weight balance, etc., while having the same product number. As a result, the shape accuracy error in the manufacturing method of the above-mentioned method occurred, and the use of tour pros and advanced users required adjustment of the loft angle and lie angle by manual operation using an adjuster.

  In addition, the hammering forging method is superior in feel and controllability because the metal structure is dense and stable, but it requires a forging die frame, or processing that relies on manual work and skill by craftsmen. Therefore, as in the case of casting, the same part number, but the shape accuracy errors in the club specifications such as the loft angle, lie angle, face angle, weight balance, etc. will come out, and in using it for tour professionals and advanced users It was necessary to adjust the loft angle and lie angle by hand using the adjuster.

  On the other hand, in the machining method using a machine tool, since it takes 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, it is necessary to manufacture a golf club head having a complicated shape. The production cost was too high and it was not suitable for mass production. Furthermore, in recent years when cavity irons are becoming mainstream, high-performance three-dimensional NC machine tools with advanced program control are required to deeply cut the cavity part on the back side of the face part. It is also a factor.

  Therefore, an ultra-precision lost wax casting method that solves the problems in the casting method described above has been developed, the need for mechanical finishing and surface treatment processing to increase the surface accuracy of the golf club head, the material of the casting Solves problems such as poor yield.

  Furthermore, a “golf club head or a method for producing the prototype” (see Patent Document 1) capable of efficiently and accurately producing the golf club head or the prototype for solving the above-described problems, or finishing processing. In this case, a “golf club head, a manufacturing method thereof, and a head material” (see Patent Document 2) that can be held and fixed firmly at the time and finished with high accuracy have been proposed.

  However, any of the above proposals for manufacturing a golf club head is a proposal for a manufacturing method that only involves simultaneous processing of a face surface portion and a cavity surface portion of a golf club head, and includes a loft angle, a lie angle, a face angle, and a weight balance. The hosel part that forms the club specifications such as the face part and the cavity part is not cut at the same time, so the loft angle and lie angle in all counts are cut from a single metal head mold. However, the club specifications such as the face angle and the weight balance are not numerically set by a machine tool to manufacture a high precision golf club head.

  Further, a metal golf club head can be manufactured in all counts by cutting from a single metal block by the applicant of the present application to solve the above-mentioned problems. A metallic golf club head manufactured by the method "(see Patent Document 3) has been proposed.

  However, the above proposal employs means for cutting a metal block formed by extrusion into a golf club head shape with a machine tool. There was a problem that an expensive three-dimensional machine tool had to be operated for a long time.

  In order to solve the above-mentioned problems, the present applicant has determined club specifications such as loft angle, lie angle, face angle, weight balance, etc. for all iron clubs by cutting from a single metal head original mold. This leads to a proposal of a “metallic golf club head manufacturing method and a metallic golf club head manufactured by the manufacturing method” that can be numerically set by a machine tool.

JP-A-6-55324 JP 2011-125611 A JP 2012-179275 A

  In view of the above problems, the present invention numerically sets club specifications such as loft angle, lie angle, face angle, weight balance, etc. in all iron club counts cut from a single metal head original mold by a machine tool. An object of the present invention is to provide a method for manufacturing a metal golf club head that can be manufactured, and a metal golf club head manufactured by the method.

  In order to solve the above-mentioned problems, the present invention sets the club specifications such as loft angle, lie angle, face angle, weight balance, etc. in all counts of an iron club by cutting from one metal head original forming mold with a machine tool. A method of manufacturing a metal golf club head that can be performed by placing a metal in a mold in a heated state to form a protrusion having a horizontal surface from a cavity surface portion to a hosel portion, and a sole portion and a crown portion Each includes a die forging step for forging a metal head original forming die having a protruding wing portion having a horizontal surface on the face side, and at least two positioning holes and at least one screw hole in the projecting portion. Metal head prototype on the fixed jig for 3-axis cutting machine tool by screw hole / drilling process to be formed and positioning hole formed in the protruding part In a state in which the mold body is placed while being positioned and the fixing tool for the triaxial cutting machine tool and the metal head original forming mold body are fixed by the screw holes formed in the protruding portion, the triaxial cutting machine tool Cutting the upper half of the face surface portion and the hosel portion, forming at least one positioning hole and at least one screw hole in each overhanging blade portion, and positioning formed in each overhanging blade portion The metal head original forming mold body is positioned while being inverted on the fixing jig for a 5-axis cutting machine tool by the hole, and is fixed for the 5-axis cutting machine tool by the screw hole formed in each overhanging wing portion. With the jig and the metal head original mold fixed, the cavity surface portion and the lower half of the hosel portion are cut by a 5-axis cutting machine tool, and the screw portion of the hosel portion is Cavity surface part machining process that is sometimes formed, overhanging wing part cutting process for cutting the overhanging wing part formed on the sole part and the overhanging wing part formed on the crown part, and finishing with barreling, polishing, and plating. The process consists of the following steps:

  Further, in the method for manufacturing a metal golf club head according to the present invention, the cavity surface portion machining step may be performed by cutting at least one or both of the overhang wing portion formed in the sole portion and the overhang wing portion formed in the crown portion. It is possible to adopt means which are performed simultaneously in

  Furthermore, the present invention is 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, the club such as the shape of the golf club head, the loft angle, the lie angle, the face angle, and the weight balance can be changed by changing the cutting program of the cutting machine tool. It has an excellent effect that the numerical value can be finely set according to the personal data.

  Also, according to the method for manufacturing a metal golf club head according to the present invention, the metal head original forming body contains club specifications such as loft angle, lie angle, face angle, weight balance, etc. in all iron club counts. Since it is molded with a shape and a thickness, it has an excellent effect that the golf club head in all the iron club counts can be cut with a cutting machine tool with one metal head original mold.

  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 tool 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 highly accurate and identical iron golf club head with almost no shape accuracy error in the manufacturing method of club specifications, and fine adjustment work by hand of the loft angle and lie angle in the hosel part after cutting is possible. There is an excellent effect that it is unnecessary.

  Furthermore, according to the method for manufacturing a metal golf club head according to the present invention, club specifications such as loft angle, lie angle, face angle, weight balance and the like based on the measurement data of the user's body shape and swing speed / track are provided. It has an excellent effect that it is possible to easily produce the prototypes provided.

  Furthermore, according to the method for manufacturing a metal golf club head according to the present invention, it is possible to easily manufacture prototypes having different club specifications such as loft angle, lie angle, face angle, weight balance, etc. It has an excellent effect that it can be tested with various prototypes of different angles.

  And, according to the metal golf club head manufactured by the manufacturing method according to the present invention, it is possible to produce a variety of products and small lots, so that it is possible to cope with a short-term model change. Play.

  In addition, according to the golf club head manufactured by the manufacturing method according to the present invention, it is possible to easily process design decoration characters, logo marks, score lines and the like simultaneously with the head processing.

It is a chart figure which shows the manufacturing process of the metal golf club head concerning this invention. Example 1 It is explanatory drawing which shows the metal mold | die forging process of the metal golf club head concerning this invention. It is explanatory drawing which shows the screw hole and drilling process of the metal golf club head concerning this invention. It is explanatory drawing which shows the face surface part processing process of the metal golf club head concerning this invention. It is explanatory drawing which shows the cavity surface part process process of the metal golf club head concerning this invention. It is explanatory drawing which shows the projecting wing | blade part cutting process of the metal golf club head concerning this invention. It is explanatory drawing which shows the metal golf club head manufactured with the manufacturing method of the metal golf club head concerning this invention. (Example 2)

  The manufacturing method of the metal golf club head 10 according to the present invention includes a die forging step S1, a screw hole / drilling step S2, a face surface portion processing step S3, a cavity surface portion processing step S4, and a protruding wing portion cutting step. A manufacturing method comprising S5 and finishing step S6, which includes clubs such as loft angle, lie angle, face angle, weight balance, etc. in all iron clubs by cutting from one metal head original forming mold The most characteristic feature is that it has adopted a means by which the specification can be numerically set by the cutting machine tool. Hereinafter, a method for manufacturing a metal golf club head 10 according to the present invention and an embodiment of a metal golf club head 10 manufactured by the 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 spirit of the technical idea of the present invention.

  FIG. 1 is a chart showing manufacturing steps of a metal golf club head 10 according to the present invention. In other words, a metal golf golf club can be numerically set with club cutting specifications such as loft angle, lie angle, face angle, weight balance, etc. in all iron club counts cut from one metal head original mold 20. A method for manufacturing a club head 10, which includes a die forging step S 1, a screw hole / drilling step S 2, a face surface portion processing step S 3, a cavity surface portion processing step S 4, a protruding blade portion cutting step S 5, and a finishing step. S6.

  The die forging step S1 is a step of forging the metal head original forming die 20 by putting it in a die while the metal is heated, mainly soft iron, 20C, 25C, SS400, stainless steel, titanium, titanium. A round bar material such as an alloy is heated to 1200 ° C. and subjected to roughing or finishing with an air hammer, and then fitted into a forging die and molded.

FIG. 2 is an explanatory view showing the metal head original forming die 20 forged by the die forging step S1.
The metal head original forming mold 20 is formed with a protruding portion 41 having a horizontal surface 41a from the cavity surface portion 40 to the hosel portion, and the sole portion 21 and the crown portion 22 each have a protruding wing having a horizontal surface 50a on the face side. The flat wall portion corresponds to the face surface portion 30 and the cavity surface portion 40, the projecting portion 41 and the overhanging wing portion 50 correspond to the chucking portion, and the oblique rising portion corresponds to the hosel portion 60. Molded in shape.

  Further, the metal head original forming mold 20 is formed with a shape and a thickness dimension including club specifications such as loft angle, lie angle, face angle, weight balance, etc. in all counts of the iron club at each processing place. The golf club head in all the iron club counts has a shape that can be manufactured by a machine tool with one metal head original forming mold 20.

FIG. 3 is an explanatory view showing the screw hole / drilling step S2 of the metal golf club head 10 according to the present invention.
In the screw hole / drilling step S2 according to the present invention, at least two positioning holes 43 and at least one or more positioning holes 43 are formed in the protruding portion 41 formed on the cavity surface portion 40 of the metal head original forming mold body 20 formed by die forging. The screw hole 42 for fixing the metal head original forming die 20 to the fixing tool 70 for the triaxial cutting machine tool and the positioning hole 43 in the subsequent face surface portion machining step S3. Is a step of drilling.

  By forming at least two or more positioning holes 43 and at least one or more screw holes 42 in the projecting portion 41 formed in the cavity surface portion 40 of the metal head original mold 20, it is possible to accurately perform the post-step face surface portion processing step S 3. The processing of the face surface portion 30 with an unprecedented high accuracy can be realized, and a dedicated fixing jig for every count is not required in the cutting process.

FIG. 4 is an explanatory view showing the face surface portion processing step S3 of the metal golf club head 10 according to the present invention. FIG. 4 (a) is an overall perspective view of the metal head original forming mold 20, and FIG. b) is a cross-sectional explanatory diagram of the metal head original forming mold body 20 during cutting.
In the face surface portion machining step S3 according to the present invention, the metal head original forming mold body 20 is positioned on the fixing jig 70 for a triaxial cutting machine tool by the positioning hole 43 formed in the protruding portion 41 in the previous step, and the In a state where the fixing tool 70 for the triaxial cutting machine tool and the metal head original forming mold 20 are fixed by the screw holes 42 formed in the projecting portion 41, the upper surface of the face portion 30 and the hosel portion 60 by the triaxial cutting machine tool. This is a step of cutting half and forming at least one positioning hole 52 and at least one screw hole 51 in each overhanging wing portion 50.

  In the face surface portion processing step S3 in the present invention, the upper half of the metal head original forming mold 20 and the score line 31 are cut, and the face surface portion 30 becomes the cutting reference surface in the subsequent step. The high-precision metal golf club head 10 can be provided.

FIG. 5 is an explanatory view showing the cavity surface portion processing step S4 of the metal golf club head 10 according to the present invention. FIG. 5 (a) is an overall perspective view of the metal head original forming mold 20, and FIG. b) is a cross-sectional explanatory diagram of the metal head original forming mold body 20 during cutting.
In the cavity surface portion machining step S4 according to the present invention, the metal head original forming mold is formed on the fixing jig 71 for a 5-axis cutting machine tool by the positioning holes 52 formed in each projecting blade portion 50 in the face surface portion machining step S3 of the previous step. 20 is positioned while being inverted, and is fixed to the five-axis cutting machine tool fixing jig 71 and the metal head original forming body 20 by the screw holes 51 formed in each overhanging wing portion 50. In this step, the cavity surface portion 40 and the lower half of the hosel portion 60 are cut by a 5-axis cutting machine tool, and the screw portion 61 of the hosel portion 60 is simultaneously formed.

  In the cavity surface portion machining step S4 in the present invention, the dimension and angle can be freely adjusted by using a 5-axis cutting machine tool, and the cavity surface portion 40 and the hosel portion 60 can be simultaneously processed. Therefore, it is possible to set accuracy of relative angles such as loft angle, lie angle, face angle, weight balance, etc., which could not be processed conventionally, and engraving of engraving and design decoration characters.

FIG. 6 is an explanatory view showing a projecting wing cutting step of the metal golf club head according to the present invention.
The overhanging blade section cutting step S5 according to the present invention is a step of separating the overhanging blade section 50 formed in the sole portion 21 and the crown portion 22 left after finishing the role in the cavity surface section processing step S4 of the previous step.

  The overhanging wing portion 50 in the present invention is formed so as to protrude outwardly from the sole portion 21 and the crown portion 22 of the metal head original forming mold 20. In the cavity surface portion machining step S4 in which the machining of the lower half of the cavity surface portion 40 and the hosel portion 60 and the forming portion of the screw portion 61 of the hosel portion 60 are simultaneously performed in the machine, the metal head original forming mold body 5 has five axes. Since it can be reliably fixed to the cutting machine tool fixing jig 71 without blurring or vibration, it is possible to provide a metal golf club head 10 with a high precision that has never been obtained.

  By the way, regarding the cutting of either the overhanging wing part 50 formed in the sole part 21 or the overhanging wing part 50 formed in the crown part 22 performed in the overhanging wing part cutting step S5, in the cavity surface part processing step S4. It is possible to cut at the same time. By adopting such a mode, the cutting operation of the overhanging wing part 50 in the overhanging wing part cutting step S5 is simplified, which contributes to improvement in work efficiency.

  Further, the cutting of both the overhanging blade portion 50 formed on the sole portion 21 and the overhanging blade portion 50 formed on the crown portion 22 performed in the overhanging blade portion cutting step S5 is simultaneously performed in the cavity surface portion processing step S4. It is also possible to perform such a mode. By adopting such a mode, the overhanging blade section cutting step S5 can be omitted, which contributes to improvement of work efficiency.

  The finishing step S6 according to the present invention is a step in which barrel processing, polishing processing, and plating processing are performed on the entire metal head original mold 20.

  In the finishing step S6, the metal head original forming body 20 cut in each of the preceding steps is subjected to barrel processing, polishing processing, and chrome plating, and is further colored into engraved letters and the like, and a final quality inspection is performed. Finished product.

  FIG. 7 is an explanatory view showing the metal golf club head 10 manufactured by the method of manufacturing the metal golf club head 10 according to the present invention, and FIG. 7A is the entire face side of the metal golf club head 10. A perspective view is shown, and FIG. 7B is an overall perspective view of the cavity side of the metal golf club head 10.

  In the metal golf club head 10 according to the present invention, as described in the first embodiment, the metal is heated and placed in the mold, and the protruding portion 41 having the horizontal surface 41a from the cavity surface portion 40 to the hosel portion 60 is formed. At the same time, a die forging step S1 for forging and molding the metal head original forming mold body 20 in which the overhanging wing portion 50 having the horizontal surface 50a on the face side is formed on the sole portion 21 and the crown portion 22, respectively, and the protruding portion 41. A screw hole / drilling step S2 for forming at least two positioning holes 43 and at least one screw hole 42 in the first and second positioning holes 43 formed on the projecting portion 41 on the fixing tool 70 for a three-axis cutting machine tool. The metal head original forming mold body 20 is placed while being positioned, and a fixing tool 70 for a triaxial cutting machine tool is formed by a screw hole 42 formed in the protruding portion 41. In a state where the metal head original forming body 20 is fixed, the upper half of the face surface portion 30 and the hosel portion 60 are cut by a triaxial cutting machine tool, and at least one positioning hole 52 is formed in each overhanging wing portion 50. The metal head original forming mold 20 is inverted on the fixing jig 71 for a 5-axis cutting machine tool by the face surface portion machining step S3 for forming at least one screw hole 51 and the positioning hole 52 formed in each overhanging blade portion 50. In a state where the fixing tool 71 for the 5-axis cutting machine tool and the metal head original forming body 20 are fixed by the screw holes 51 formed in each projecting wing portion 50 while being positioned while being positioned. A cavity that cuts the cavity surface portion 40 and the lower half of the hosel portion 60 with an axial cutting machine tool and simultaneously forms the screw portion 61 of the hosel portion 60. Surface portion machining step S4, overhang blade portion 50 formed on the sole portion 21 and overhang blade portion cutting step S5 for cutting the overhang blade portion 50 formed on the crown portion 22, barrel processing, polishing processing, and plating processing are performed. The finishing step S6 is manufactured.

  That is, according to the above manufacturing method, the club specifications such as loft angle, lie angle, face angle, weight balance, etc. in all the iron club counts cut from one metal head original mold 20 are numerically set by the machine tool. Therefore, the metal golf club head 10 manufactured by the manufacturing method becomes a highly accurate iron golf club head with almost no shape accuracy error in the manufacturing method of club specifications.

  A method for manufacturing a metal golf club head 10 according to the present invention and a metal golf club head 10 manufactured by the manufacturing method can be obtained by performing three-axis and five-axis cutting with a machine tool. It is possible to produce golf club heads in all counts from the forming mold 20, and to set numerical values for club specifications such as loft angle, lie angle, face angle, weight balance, etc. in all counts of iron clubs with a machine tool, Furthermore, since the mass production of the same specifications is possible with high accuracy, the industrial applicability of the present invention is considered extremely high.

DESCRIPTION OF SYMBOLS 10 Metal golf club head 20 Metal head original forming body 21 Sole part 22 Crown part 30 Face surface part 31 Score line 40 Cavity surface part 41 Projection part 41a Horizontal plane 42 Screw hole 43 Positioning hole 50 Overhang wing part 50a Horizontal plane 51 Screw hole 52 Positioning Hole 60 Hosel part 61 Screw part 70 3-axis cutting machine tool fixing jig 71 5-axis cutting machine tool fixing jig S1 Die forging process S2 Screw hole / drilling process S3 Face surface part processing process S4 Cavity surface part processing process S5 Overhang blade part cutting Process S6 Finishing process

Claims (3)

A golf club head made of metal that can be numerically set by a cutting machine tool such as loft angle, lie angle, face angle, weight balance, etc. in all iron clubs by cutting from a single metal head original mold A manufacturing method comprising:
The metal was put in a mold in a heated state, and a protruding portion having a horizontal surface was formed from the cavity surface portion to the hosel portion, and an overhanging wing portion having a horizontal surface on the face side was formed on the sole portion and the crown portion, respectively. A die forging process for forging a metal head original forming mold,
A screw hole / drilling step of forming at least two positioning holes and at least one screw hole in the projecting portion;
The metal head original forming mold body is positioned and placed on the fixing jig for a triaxial cutting machine tool by the positioning hole formed in the protruding portion, and the triaxial cutting work is formed by the screw hole formed in the protruding portion. In a state in which the machine fixing jig and the metal head original mold are fixed, the upper half of the face surface portion and the hosel portion are cut by a triaxial cutting machine tool, and at least one positioning hole is formed in each of the overhanging wing portions. And a face surface portion machining step for forming at least one screw hole,
The metal head original forming mold was placed while being inverted and placed on the fixed jig for a 5-axis cutting machine tool by the positioning holes formed in each of the overhang wings, and formed in each of the overhang wings. In a state where the fixing jig for the 5-axis cutting machine tool and the metal head forming mold are fixed by the screw holes, the cavity surface portion and the lower half of the hosel portion are cut by the 5-axis cutting machine tool, and the screw of the hosel portion Cavity surface part processing step for simultaneously forming the part,
A projecting wing part cutting step for cutting the projecting wing part formed on the sole part and the projecting wing part formed on the crown part;
Finishing process where barrel processing, polishing processing, plating processing are performed,
A method of manufacturing a metal golf club head comprising: In the method of manufacturing the metal golf club head,
The cutting of at least one or both of the overhanging wing part formed in the sole part and the overhanging wing part formed in the crown part is performed simultaneously in the cavity surface part machining step. Method for manufacturing a metal golf club head of the present invention.   A metal golf club head manufactured by the manufacturing method according to claim 1 or 2.