Golf club head and method of manufacturing the same

Abstract

A face portion 11 of a golf club head 10 is obtained press-forming a metal plate into a predetermined shape. On the front surface 11a of the face portion 11, score lines 12 are formed by means of die sinking of electrical discharge machining, and a mirror finished surface portion 13 is formed by means of finish processing of electrical discharge machining. On the rear surface 11b of the face portion 11, a rib structure 15, and a high hardness layer 16 of an amorphous metal layer are formed. The electrical discharge machining is numerically controlled.

Description

[0001] 1. Field of the Invention[0002] The present invention relates to a golf club head having a face portion whose various performances and functions are improved and to a method of manufacturing the same.[0003] 2. Description of Related Art[0004] Golf club heads are roughly grouped into three types, that is, a wood, an iron and a putter, and performances and functions required for the respective types are different.[0005] More particularly, in the wood, the most important performance is a hitting distance (i.e., a performance of allowing the hit ball to be far), but a hitting direction (i.e., a performance of allowing the hit ball to accurately proceed in an intended direction) and its design (e.g., an outer appearance giving a deluxe impression) are also important. Thus, while the most important performance common in the woods is the hitting distance, emphasized performances are slightly different according to the types of woods: a driver and a fairway wood. Specifically, in the...

AI Technical Summary

Problems solved by technology

However, machining is not suited for mass production, and the manufacturing costs required for the processing and the molds are increased.

However, in these constitutions, characteristic features inherent in the materials are not sufficiently exhibited.

Also, extra treatments are needed, so that the processing efficiency becomes low, thereby increasing the manufacturing costs.

However, the reinforcing ribs need to be processed into complicated shapes, so that employing the reinforcing ribs lowers the processing efficiency and accordingly is not suited for mass production.

Further, since the reinforcing ribs obtained through machining give a poor appearance, such ribs cannot be used for an iron having a cavity back structure (i.e., a structure in which a cavity is formed at the back of the face portion) in which the rear surface is seen from the rear side, while such ribs can be used for a metal wood or an iron having a hollow structure in which the ribs cannot been seen from outside.

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