Golf club head
A technology for golf clubs and golf balls, which is applied to golf balls, golf clubs, rackets, etc., and can solve problems such as the impossibility of fully using the club head
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example 1
[0030] According to the four-piece forging method, four titanium club heads were manufactured, which had a club head volume of 255 cubic centimeters and a weight of 199 grams. These four club heads differ. However, the difference only concerns the face structure, everything else is the same.
[0031] First Prototype Head:
[0032] The first prototype head had a center thickness (the center of the intersection of the thick portion) of 4.80 mm. The crown Mc and sole Ms have a thickness of 2.2 mm, and the toe Mt and heel Mh have a thickness of 2.5 mm. It should be noted that the type of the thick portion is selected so that the thickness of the thick portion gradually decreases from the central portion in the direction of the longer length so as to have a thickness of 3 mm at both ends in the longer direction. The total area of the back of the face is 48.2cm 2 . The ratio of the divided areas is as follows. The crown area Mca accounts for 4.6%, the sole area Msa accounts ...
example 2
[0049] Similar to Example 1, three titanium club heads were manufactured according to the four-piece forging method, which had a club head volume of 255 cubic centimeters and a weight of 199 g. However, as shown in Table 2 below, the thicknesses of the thick portion and the divided region were different from the prototype head 1 .
[0050] [Table 2]
[0051] Heel
[0052] After connecting the shaft to the prototype head 2-4, in the same manner as in Example 1, a flying distance test was performed by using an automatic device. The test results are shown in Table 3.
[0053] [table 3]
[0054] distance
[0055] As clearly shown in Table 3, the maximum difference in flying distance is 8 m in the case of a thickness difference of 1 mm in the club face. In addition, when the thickness difference in the club face is 5mm, the maximum difference in flying distance is also 8m. Therefore, for both cases, it can be understood that the head structure achieves a...
example 3
[0057] Similar to Example 1, four titanium club heads were manufactured according to the four-piece forging method. In this example, the area of the thick portion on the back of the face was changed as in the prototype heads 5-8 shown in Table 4 below. It should be noted that the prototype head 6 shown in this example corresponds to the prototype head 1 described above.
[0058] [Table 4]
[0059] Area of the back of the face
[0060] After attaching the shaft to the prototype head 5-8, in the same manner as in Example 1, a flying distance test was performed by using an automatic device. The flight distances corresponding to the hit points are shown in Table 5.
[0061] [table 5]
[0062] distance
[0063] As shown in Table 5 above, by using the prototype head 8, it is possible to make a maximum difference of 12 m or less. Furthermore, it was found that it is more effective if the ratio of the area of the thick portion is 18.0% or less.
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