GOLF CLUB HEAD
First Claim
1. A golf club head having a hollow part, comprising:
- a head body having a face aperture part; and
a face member held to the face aperture part by welding, the face member being formed by forging of a rolled material of a titanium alloy having an α
phase, and the face member comprising a thick-material part positioned in the center of the face member, an outer peripheral part positioned at the periphery of the thick-material part, and a thin-material part partially positioned between the thick-material part and the outer peripheral part,wherein the thick-material part is formed in an area having a shape obtained by depressing a substantially elliptical or substantially circular shape in a substantially arcuate shape toward the center of the ellipse at two opposite sides thereof,wherein the thick-material part has a material thickness that is thickest at the center part of the face part and also gradually becomes thin from the center part toward the outer peripheral part,wherein the thick-material part has a material thickness that is thicker than the outer peripheral part and the thin-material part has a material thickness that is thinner than the outer peripheral part, andwherein the thick-material part, the thin-material part, and the peripheral part are formed by the forging so as to destroy an orientation of the α
-phase.
1 Assignment
0 Petitions
Accused Products
Abstract
A hollow golf club head has a head body having a face aperture part and a face member held to the face aperture part by welding, the face member formed by forging a rolled material of a titanium alloy having an α phase, and the face member comprising a thick-material part positioned in the center of the face member, an outer peripheral part positioned at the periphery of the thick-material part, and a thin-material part partially positioned between the thick-material part and the outer peripheral part. The thick-material part is formed in an area having a shape obtained by depressing a substantially elliptical or substantially circular shape in a substantially arcuate shape toward the center of the ellipse at two opposite sides thereof. The thick-material part, the thin-material part, and the peripheral part are formed by the forging so as to destroy an orientation of the α-phase.
64 Citations
6 Claims
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1. A golf club head having a hollow part, comprising:
-
a head body having a face aperture part; and a face member held to the face aperture part by welding, the face member being formed by forging of a rolled material of a titanium alloy having an α
phase, and the face member comprising a thick-material part positioned in the center of the face member, an outer peripheral part positioned at the periphery of the thick-material part, and a thin-material part partially positioned between the thick-material part and the outer peripheral part,wherein the thick-material part is formed in an area having a shape obtained by depressing a substantially elliptical or substantially circular shape in a substantially arcuate shape toward the center of the ellipse at two opposite sides thereof, wherein the thick-material part has a material thickness that is thickest at the center part of the face part and also gradually becomes thin from the center part toward the outer peripheral part, wherein the thick-material part has a material thickness that is thicker than the outer peripheral part and the thin-material part has a material thickness that is thinner than the outer peripheral part, and wherein the thick-material part, the thin-material part, and the peripheral part are formed by the forging so as to destroy an orientation of the α
-phase. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification