Patent ID: 7086960
Filing Date: 2006-08-08
Classification: A63B

Abstract:
1. A method for manufacturing a golf club head by friction welding, comprising: forming one of at least one inclined surface and at least one arcuate surface on an abutting portion of a first portion of a head body of the golf club head in aiding friction welding, said at least one inclined surface including a conic first inclined surface section and a second inclined surface section surrounding the conic first inclined surface section and at an angle with respect to the conic first inclined surface section, said conic first inclined surface section including a plurality of annularly arranged triangular inclined sections having a common apex; abutting the abutting portion of the first portion against an abutting portion of a second portion of the head body of the golf club head in preparing friction welding; and rotating one of the abutting portion of the first portion and the abutting portion of the second portion relative to the other of the abutting portion of the first portion and the abutting portion of the second portion about an axis to proceed with friction welding thereby forming a joining area; and surface finishing the joining area of the abutting portion of the first portion and the abutting portion of the second portion.