JP2018068684A - Iron type club head and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an iron type club head which can obtain a desired head balance, has high head strength, and hardly breaks even if it hits a golf ball strongly.SOLUTION: In an iron type club head having a structure in which a head body 12 is provided behind a face part 11, the head body comprises a sole 12A and a back face part 12B. The back face part has an upper end edge 12C extending between a toe and a heel at a height of a half part of the face part in a height direction. While concave groove 13, which is an arc concave bottom surface in a rear view, is provided between the back face part and the face part, a metal flow of a head body peripheral portion and a metal flow of a face part peripheral portion by forging are mutually continuous.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an iron-type club head and a method for manufacturing the same, and more particularly, to a club head that can obtain a desired head balance, has high head strength, and does not break even when a golf ball is hit hard.

  Recently, a large number of people, from elementary school students to elderly people, regardless of gender, have come to enjoy golf competitions. Many golfers want a driver-type golf club or an iron-type golf club to fly a golf ball stably in an intended and accurate distance. It is said that the balance of a club when swinging an iron type golf club greatly affects the flight distance and accuracy of the golf ball.

It is known that the direction of a hit ball can be improved by increasing the depth of center of gravity and the moment of inertia in an iron type golf club head (hereinafter referred to as an iron type club head).
For example, an iron-type club head has been proposed in which a raised portion extending in the toe-heel direction is provided on the sole behind the face portion of the club head so as to obtain a large depth of gravity and a moment of inertia (Patent Documents 1 and 2). ).

JP 2013-59680 A JP 2015-29596 A

  However, in the iron-type club heads described in Patent Documents 1 and 2, the head body is made hollow and manufactured separately from the face part, and a raised part is integrally formed on the sole part of the head body. Since the face parts were fitted and joined together by welding, the welded parts were ground and polished, so if the grinding and polishing method is poor, the balance of the head will not only deteriorate, but the golf ball will be insufficient in strength There was a possibility that the face part would be peeled off when hitting.

  In view of such problems, an object of the present invention is to provide an iron-type club head that can obtain a desired head balance, has high head strength, and does not break even when the golf ball is hit hard.

  An iron-type club head according to the present invention is an iron-type club head having a head body behind a face portion. The head body includes a sole portion and a back face portion, and the back face portion is a height of the face portion. While having an upper end edge extending between the toe and the heel at the height of the half in the length direction, and having a concave groove on the bottom surface of the arcuate concave shape in the rear view between the back face part and the face part, the head by forging The metal flow at the peripheral portion of the main body and the metal flow at the peripheral portion of the face part are continuous with each other.

The main feature of the present invention is that the face portion and the head main body are integrally formed, and a concave groove having a concave bottom surface in a rear view is formed between the face portion and the head main body back face portion. .
With such a head structure, the center of gravity of the head is large and the moment of inertia (rotational resistance around the center of gravity at the time of hitting) is also increased, so that a desired head balance can be obtained and the hit golf ball can fly accurately and stably in the desired direction. Can be balled.

The second feature of the present invention is that the face portion and the head main body are integrally formed by forging, and a concave groove having a concave bottom surface when viewed from the back is formed between the face portion and the head main body back face portion by cutting. The point is that they are formed.
As a result, when the head surface is finished and polished, the metal flow (forged streamline) at the periphery of the face part and the metal flow (forged streamline) at the periphery of the head body (sole part and back face part) are continuously strong. Therefore, even if the golf ball is hit hard, the head is not broken.

  The head forging material may be cut out from a soft iron rod, or a soft iron head-shaped block may be cast as a material. Forging may be die forging or free forging. Forging may be hot forging or warm forging. For example, cutting with a milling blade can be employed for cutting the groove.

1 is a rear perspective view showing a preferred embodiment of an iron-type club head according to the present invention. It is an enlarged view of FIG. It is the II-II sectional view taken on the line of FIG. It is process drawing which shows typically an example of the manufacturing method of the iron type club head concerning this invention. It is a figure which shows one example of the jig | tool in the ditch | groove cutting process in the said process.

  Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 5 show a preferred embodiment of an iron type golf club according to the present invention. The iron-type golf head 10 of this example is composed of a face part 11, a head body 12 and a hosel part 14, the head body 12 is composed of a sole part 12A and a back face part 12B, and the hosel part 14 is composed of a face part 11 and It is integrally formed on the heel side of the head body 12, and is formed in a cylindrical shape so that the shaft is fitted and coupled.

  Reinforcing ribs 11A are formed on the periphery of the back surface of the face portion 11, a head body 12 is integrally formed on the back surface of the face portion 11, and the back face portion 12B of the head body 12 is substantially half the height direction of the face portion 11. An upper edge 12C is provided at the height of the portion, and a concave groove 13 is formed between the back face portion 12B and the face portion 11 of the head main body 12, and the concave groove 13 has a circular arc concave shape in the rear view. Thus, the weight is distributed to the toe side on the sole portion 12A of the head body 12.

  When the iron-type club head 10 of this example is manufactured, as shown in FIG. 4A, a three-dimensional head material 40 in which the face portion, the head body, and the hosel portion are integrated using soft iron as a raw material. Manufactured by casting. In this case, the soft bar can be cut into a predetermined length to be used as a material for the next forging process, but the forging ratio may be increased, and the forging time becomes longer.

  Next, as shown in FIG. 4B, the head material 40 is heated to a forging temperature, for example, 200 ° C. to 800 ° C. for warm forging and 1100 ° C. to 1250 ° C. for hot forging. Then, the head material 40 is set on the forging dies 41 and 42, and the die forging is performed by repeatedly applying a load, thereby producing a head shaped material 43 having substantially the dimensions of an iron type club head and a three-dimensional shape. In this case, in the die forging, the head blank 43 can be manufactured by free forging using a hammer or the like.

When the head raw material 43 is obtained in this way, the head raw material 43 is set on a jig 20 as shown in FIG. 5 and set on a milling machine or the like. As shown in FIG. When the concave groove 13 is cut between the face portion 11 and the head main body 12 by the blade 44 and the surface is finish-polished, the product iron-type club head 10 can be manufactured.
The jig 20 has three pins 21 and two bases 23 erected so that the head element 43 can be positioned.

  In the iron-type club head 10 of this example, the face portion 11 and the head main body 12 are integrally formed, and a concave groove 13 having an arcuate concave bottom surface is formed between the face portion 11 and the head main body 12. The weight is distributed to the heel side of the head. This head structure increases the center of gravity depth of the head and increases the moment of inertia, so that the desired head balance can be obtained and the golf ball hit in the desired direction The ball can be made to fly accurately and stably.

  Further, the face portion 11 and the head main body 12 are integrally manufactured by forging, and the bottom surface arc-shaped concave groove 13 is formed between the face portion 11 and the head main body 12 by cutting. The peripheral portion of the head and the sole portion 12A of the head body 12 and the peripheral portion of the back face portion 12B do not cut the metal flow (forged line) by cutting the concave groove 13, and the metal flow has a continuous high strength. The head 10 is obtained, and even if the golf ball is hit hard, the head 10 is not broken.

10 Club Head 11 Face 12 Head Body 13 Groove 14 Hosel

When the iron-type club head 10 of this example is manufactured, as shown in the upper part of FIG. 4, a three-dimensional head material 40 in which the face part, the head body, and the hosel part are integrated is cast by using soft iron as a raw material. To manufacture. In this case, the soft bar can be cut into a predetermined length to be used as a material for the next forging process, but the forging ratio may be increased, and the forging time becomes longer.

Next, as shown in the middle of FIG. 4, the head material 40 is heated to a forging temperature, for example, a temperature of 200 ° C. to 800 ° C. for warm forging and 1100 ° C. to 1250 ° C. for hot forging,
The head material 40 is set on forging dies 41 and 42, and a forging is performed by repeatedly applying a load, thereby producing a head shaped material 43 having a substantially dimensional shape and a three-dimensional shape of an iron type club head. In this case, in the die forging, the head blank 43 can be manufactured by free forging using a hammer or the like.

When the head raw material 43 is obtained in this way, the head raw material 43 is set on a jig 20 as shown in FIG. 5 and set on a milling machine or the like. As shown in the lower part of FIG. By cutting the groove 13 between the face portion 11 and the head main body 12 and finishing and polishing the surface, the product iron-type club head 10 can be manufactured.
The jig 20 has three pins 21 and two bases 23 erected so that the head element 43 can be positioned.

Claims (2)

In an iron-type club head having a head body behind the face part,
The head main body (12) includes a sole portion (12A) and a back face portion (12B), and the back face portion (12B) has a toe heel at the height of the half portion in the height direction of the face portion (11). While having an upper end edge (12C) extending in between, and having a concave groove (13) having a concave bottom surface in a circular arc when viewed from the back between the back face part (12B) and the face part (11), the back by forging An iron-type club head characterized in that the metal flow at the peripheral portion of the face portion (12B) and the metal flow at the peripheral portion of the face portion (11) are continuous with each other. A process of producing a head material (40) by casting using soft iron as a raw material, and setting the head material (40) in a forging die (41, 42) and then setting the head shape material (43) warm or hot The forging step, the head shape member (43) is set on the jig (20), and the back surface portion (12B) between the face portion (11) and the head body (12) is milled by the milling blade (44). And a step of cutting the concave groove (13) on the bottom surface of the concave shape of the arc of view. A method of manufacturing an iron-type club head, comprising:

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