JP2015231486A - Method for manufacturing golf club head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing golf club heads capable of highly accurately finishing a sole part of an iron golf club head into a target shape.SOLUTION: The method for manufacturing iron golf club heads having a step of polishing or grinding a head material includes: forming a plurality of grooves 10 on a back face 5 side of a sole part 3 of a head material 1; and polishing or grinding to such an extent as to leave the grooves 10. Trapezoidal cross-sectional grooves may be formed and, when the groove width becomes a prescribed width or less, the polishing or grinding may be finished. Alternatively, two types of deep/shallow grooves are provided and, when the shallow grooves disappear, the polishing or grinding may be finished.

Description

  The present invention relates to a method for manufacturing a golf club head, and more particularly to a method for manufacturing an iron type golf club head including a step of processing a head element body by polishing or grinding.

  A metal golf club head is manufactured through a process including a finishing process by polishing or grinding a head element manufactured by casting or forging (for example, Patent Document 1).

  As a method for polishing or grinding the head element, Patent Document 2 describes a method in which a large number of small grooves having a depth corresponding to the thickness are provided in a metal shell, and polishing is performed up to the depth of the small grooves. . According to this method, the metal shell can be uniformly polished to a desired depth without requiring skill by the craftsman.

  In Patent Document 2, the metal shell is a base body of a wood type golf club head and has a hollow structure. In Patent Document 2, a small groove is provided on the entire outer surface of the shell so that the outer surface of the shell is uniformly cut.

JP 2011-125611 A JP-A-9-215789 JP 2005-253562 A US Pat. No. 5,603,668

  In an iron type golf club head manufactured through a processing step of polishing or grinding the head element, skill is required for processing and finishing on the back surface side of the sole portion. That is, the iron-type golf club head is smoothly curved from the sole surface to the back surface, and not only the sole surface is polished or ground and the back surface is polished or ground, but the curved surface portion is also polished or ground. It is necessary to apply. If the amount of polishing or grinding of the curved phase portion is larger or smaller than the specified range, the sole shape will not be as designed, and the performance of the golf club will be impaired.

  An object of the present invention is to provide a golf club head manufacturing method capable of finishing a sole portion of an iron type golf club head into a target shape with high accuracy.

  The golf club head manufacturing method of the present invention is a golf club head manufacturing method including a step of grinding or grinding a head element body, wherein the head element body is a head element body of an iron type golf club head, A recess serving as a guide for processing by polishing or grinding is provided in at least a part of the sole portion of the head element body.

  The recess is preferably a groove. Moreover, it is preferable to provide the recessed part in the back surface side of a sole part.

  In one aspect of the present invention, when the depth of the concave portion is reduced to a predetermined depth, the polishing or grinding is finished. In another aspect of the present invention, the recess has a shape that becomes narrower as the depth increases, and polishing or grinding ends when the width of the recess decreases to a predetermined width.

  In still another aspect of the present invention, the recess has a first portion and a second portion that are continuous in the depth direction, and the second portion located deeper than the first portion is wider than the first portion. If the outer surface of the head body being polished or ground reaches the stepped surface at the boundary between the first portion and the second portion or the second portion, the polishing or grinding is performed. Exit.

  In another aspect of the present invention, a first recess and a second recess having a depth larger than the first recess are provided as the recess. If the first recess disappears by polishing or grinding, polishing or grinding is performed. Finish grinding.

  In the method for manufacturing a golf club head of the present invention, a concave portion that is a guide for the amount of processing by polishing or grinding is provided in the sole portion, and the sole portion can be polished or ground to a target shape with high accuracy. it can.

  If the concave portion is provided on the back surface side of the sole portion, the intersecting portion between the sole portion and the back surface of the golf club head can be finished to the target shape with high accuracy.

It is a perspective view of a head element body showing a method concerning an embodiment. It is a front view of a sole part. It is sectional drawing of a groove | channel. It is sectional drawing of a groove | channel. It is sectional drawing of a groove | channel. It is sectional drawing of a groove | channel. (A), (b) is a front view of a sole part.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a perspective view of the head element body 1 from the back side and the sole side. FIG. 2 is a front view of the head element body 1 from the sole side.

  The head element body 1 is made of metal manufactured by casting or forging, and includes a face surface portion 2, a bottom sole portion 3, a hosel portion 4 to which a shaft is attached, and a back surface 5. A groove 10 is provided on the back surface 5 side of the sole portion 3 as a recess that serves as a guide for the amount of processing. In this embodiment, the groove 10 has a first groove that obliquely intersects the flying ball direction so that it is on the toe side toward the rear, and a flying ball wire that is on the heel side (hosel portion 4 side) toward the rear. It consists of a second groove that is oblique to the direction, and has a mesh-like appearance.

  The concave portions such as the grooves 10 may be formed by providing convex portions on a mold for manufacturing the head element body 1 or may be formed by processing such as pressing or cutting.

  The width of the groove 10 is preferably 0.1 mm or more, particularly 0.2 mm or more, and preferably 1 mm or less, particularly 0.8 mm or less. If the groove width is too large, there is a possibility of affecting the removal performance of the sole. If the groove width is too small, the groove may be crushed during polishing or grinding, or it may be difficult to see.

  The depth of the groove 10 is preferably 0.1 mm or more, particularly preferably 0.2 mm or more, and preferably 1 mm or less, particularly 0.6 mm or less. If the groove depth is too large, it may be excessively deep with respect to the amount of polishing or grinding, or may affect the removal performance of the sole. If the groove depth is too small, the groove may disappear before the required amount of polishing or grinding.

  The cross-sectional shape of the groove 10 may be square as shown in FIG. 3 or may be U-shaped (not shown). Further, like the groove 11 in FIG. 4, a trapezoidal cross-sectional shape in which the groove width decreases toward the back (groove bottom surface) side may be used. Further, as in the groove 12 of FIG. 5, the cross-sectional shape is such that the entrance side is a large width portion 12a, the back side is a small width portion 12b, and the boundary between both is a step surface 12c. Also good. That is, the cross-sectional shape of the wide portion 12a is the first trapezoidal cross-sectional shape in which the groove width decreases toward the back (groove bottom) side, and the cross-sectional shape of the small width portion 12b has a groove width toward the back (groove bottom) side. The second trapezoidal cross-sectional shape is smaller and smaller in width than the first trapezoidal cross-sectional shape. The first trapezoidal cross-sectional shape and the second cross-sectional shape are continuous, and the bottom surface of the first trapezoidal cross-sectional shape becomes the step surface 12c. Yes.

  When polishing or grinding the back surface 5 side of the sole portion 3 of the head element body 1 having the groove 10 shown in FIG. 3, the polishing or grinding is terminated if the depth of the groove 10 is reduced to a specified depth. preferable. Thereby, the processing amount of grinding | polishing or grinding becomes a regulation amount, and a sole shape can be made into a target shape with high precision.

  In the case of the groove 11 in FIG. 4, it is preferable to finish the polishing or grinding if the groove width of the groove 11 is reduced to the specified width. Measuring the groove width is often easier than measuring the groove depth. However, also in the case of this groove | channel 11, you may make it complete | finish polishing or grinding, if the depth of the groove | channel 11 reduces to the regulation depth.

  In the case of the groove 12 in FIG. 5, it is preferable to finish the polishing or grinding when the outer surface of the head element 1 being polished or ground is flush with the stepped surface 12c. When the processing reaches the stepped surface 12c, the groove width is reduced and the groove is not a two-step groove. Therefore, the operator can confirm the processing amount only by looking at the appearance. However, in this case as well, the polishing or grinding may be terminated if the groove width becomes smaller as the polishing or grinding proceeds to the second trapezoidal cross-sectional shape 12b.

  In the present invention, as shown in FIG. 6, a first groove 13 having a relatively small depth and a second groove 14 having a larger depth are provided, and the first groove 13 disappears. If the second groove 14 remains, polishing or grinding may be terminated. Since the groove 13 disappears and the groove 14 remains, the amount of processing can be confirmed only by the operator looking at the appearance.

  4 to 6, it is possible to manufacture a golf club head in which the amount of polishing or grinding is exactly as specified, and the sole shape has a target shape with high accuracy. Then, it is found that the head is not processed too much at a glance in the subsequent inspection work by leaving the groove after polishing or grinding.

  FIG. 7 shows an example of processing (polishing or grinding) the head element body 1 provided with a groove 10 that serves as a guide for maintaining the shape of the sole portion 3 on the back surface 5 side of the sole portion 3. FIG. 7 is a front view of the sole part 3 before processing, and FIG. 7B is a front view of the sole part 3 when processed too much. A broken line in FIG. 7B indicates a sole rear edge before processing. In this example, as shown in FIG. 7B, it can be seen at a glance that half of the groove 10 disappears due to the processing, and the sole shape is not maintained. Thus, the groove | channel 10 can also be used as a standard for maintaining the sole shape before a process.

  In the above embodiment, the grooves 10 are provided in a mesh shape, but may be provided in parallel lines, may be provided in a zigzag shape or a wave shape, and the grooves are circular, elliptical, square, U-shaped, You may provide in various shapes, such as L shape and a cross shape.

  Although the groove is provided as the concave portion in the above embodiment, a concave hole may be provided, or both the groove and the concave hole may be provided. Moreover, in the said embodiment, although the groove | channel is provided in the back surface side of the sole part 3, you may provide a recessed part in another site | part.

  The present invention may be applied not only to the iron head but also to golf heads having other shapes.

DESCRIPTION OF SYMBOLS 1 Head body 2 Face part 3 Sole part 4 Hosel part 5 Back surface 10-14 Groove

Claims (9)

In a method for manufacturing a golf club head, which includes a step of processing the head body by polishing or grinding,
The head element is a head element of an iron type golf club head,
A method of manufacturing a golf club head, comprising providing at least a part of a sole portion of the head element body with a recess serving as a guide for processing by polishing or grinding.   2. The method of manufacturing a golf club head according to claim 1, wherein the recess is a groove.   3. The method of manufacturing a golf club head according to claim 2, wherein the width of the groove is 0.1 mm or more and 1 mm or less.   4. The method of manufacturing a golf club head according to claim 1, wherein the depth of the concave portion is not less than 0.1 mm and not more than 1 mm. 5.   5. The method of manufacturing a golf club head according to claim 1, wherein the concave portion is provided on a back surface side of the sole portion.   6. The method of manufacturing a golf club head according to claim 1, wherein the polishing or the grinding is finished when the depth of the concave portion is reduced to a predetermined depth.   6. The golf according to claim 1, wherein the recess has a shape that becomes narrower as the depth increases, and polishing or grinding ends when the width of the recess decreases to a predetermined width. Club head manufacturing method. 6. The concave portion according to claim 1, wherein the concave portion includes a first portion and a second portion continuous in a depth direction, and the second portion located deeper than the first portion is the first portion. The width is narrower,
When the outer surface of the head element being polished or ground reaches the stepped surface at the boundary between the first portion and the second portion or the second portion, the polishing or grinding is terminated. A method for manufacturing a golf club head.   In any one of Claims 1 thru | or 5, If the 1st recessed part and the 2nd recessed part with a larger depth are provided as said recessed part, If the 1st recessed part lose | disappears by grinding | polishing or grinding A method for manufacturing a golf club head, wherein polishing or grinding is finished.

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