Method of manufacturing golf club head and golf club head

• US 7,798,918 B2
• Filed: 09/18/2007
• Issued: 09/21/2010
• Est. Priority Date: 07/24/2007
• Status: Active Grant

• Current Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Original Assignee: Bridgestone Sports Co Limited (Bridgestone Corporation)
• Inventors: Ban, Wataru, Sato, Fumiaki
• Primary Examiner(s): Hunter; Alvin A
• Application Number:
  US11/856,936
• Publication Number:
  US 20090029797A1
• Time in Patent Office: 1,099 Days
• Field of Search: 473324-350
• US Class Current: 473/330
• CPC Class Codes: A63B 53/0408 characterised by specific dimensions, e.g. thickness
• CPC Class Codes: A63B 53/0445 Details of grooves or the like on the impact surface
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 53/047 iron-type
• CPC Class Codes: Y10T 29/49995 Shaping one-piece blank by removing material

Abstract

According to this invention, there is provided a method of manufacturing a golf cub head having a plurality of score lines on the face. The method of this invention includes the first forming step of forming grooves for the score lines on the face, and the second forming step of forming flat surfaces inclined with respect to the face by cutting into the edges of the grooves formed in the first forming step.

Claims

1. A method of manufacturing a golf club head having a plurality of score lines on a face, comprising:

a first forming step of forming grooves for the score lines on the face; and

a second forming step of forming flat surfaces inclined against a plane of the face at both edges of the grooves by cutting into the edges,

wherein a side surface of the groove is inclined against the plane by an angle that is equal to or more than 60 degrees and not greater than 80 degrees.

2. The method according to claim 1, wherein the flat surfaces are formed by an NC milling machine.

3. A method of manufacturing a golf club head having a plurality of score lines on a face, comprising:

a first forming step of forming grooves for the score lines on the face; and

a second forming step of forming flat surfaces inclined against a plane of the face at both edges of the grooves by cutting into the edges,

wherein the flat surfaces are formed by an NC milling machine, and

wherein in the second forming step, the flat surfaces are formed by cutting the edges of the grooves by a cutting tool while the face or the cutting tool relatively moves in a direction of forming the score lines.

4. The method according to claim 3, wherein a cutting depth in a direction perpendicular to the flat surface by the cutting tool in the second forming step is not greater than 0.1 mm.

5. A method of manufacturing a golf club head having a plurality of score lines on a face, comprising:

a first forming step of forming grooves for the score lines on the face; and

a second forming step of forming flat surfaces inclined against a plane of the face at both edges of the grooves by cutting into the edges,

wherein the flat surface is inclined against the plane by an angle that is smaller than 55 degrees, and

wherein the flat surfaces are formed by an NC milling machine.

6. A method of manufacturing a golf club head having a plurality of score lines on a face, comprising:

a first forming step of forming grooves for the score lines on the face; and

a second forming step of forming flat surfaces inclined against a plane of the face at both edges of the grooves by cutting into the edges,

wherein the flat surface is inclined against the plane by an angle that is equal to or more than 20 degrees and not greater than 50 degrees, and

wherein the flat surfaces are formed by an NC milling machine.

7. A method of manufacturing a golf club head having a plurality of score lines on a face, comprising:

a first forming step of forming grooves for the score lines on the face; and

a second forming step of forming flat surfaces inclined against a plane of the face at both edges of the grooves by cutting into the edges,

wherein a side surface of the groove is inclined against the plane by an angle that is smaller than 85 degrees, and

wherein the flat surfaces are formed by an NC milling machine.

8. A golf club head having a plurality of score lines on a face, wherein the score lines are formed by first forming grooves for the score lines on the face and forming flat surfaces inclined against a plane of the face at both edges of the grooves by cutting into the edges,

wherein a side surface of the groove is inclined against the plane by an angle that is equal to or more than 60 degrees and not greater than 80 degrees.