Method of designing golf club and golf club head
First Claim
1. A method of designing a golf club head by using a computer, comprising the steps of:
- preparing a ball model and a club head model obtained by dividing a golf ball and a golf club head into a plurality of finite elements respectively, wherein said club head model is provided with a central reinforcing rib formed at a central portion of a rear surface of a face part thereof and a plurality of belt-shaped reinforcing ribs extended radially from said central reinforcing rib toward a peripheral edge of said rear surface of said face part;
executing simulation of collision between said ball model and said club head model at a plurality of positions of a front surface of said face part thereof to determine a Mises stress generated at each of said collision positions; and
changing setting conditions of said central reinforcing rib and said belt-shaped reinforcing ribs to set a maximum value of Mises stresses generated at off-center positions of said front surface of said face part to less than 1.3 times a maximum value of a Mises stress generated at a center of said front surface of said face part.
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Abstract
A method for designing a golf club head by using a computer. A golf club head model in which the rear surface of a face part is provided with reinforcing ribs and a golf ball model to be analyzed by using a finite element method (FEM) are prepared. Conditions including the positions of the reinforcing ribs and the configurations thereof including the sectional areas and heights are adjusted to set the maximum value of the Mises stresses generated by the collision between the golf ball model and the golf club head model at any off-center positions of said front surface of said face part thereof to less than 1.3 times the maximum value of the Mises stress generated by the collision between the golf ball model and the golf club head model at the center of said front surface of said face part thereof.
103 Citations
18 Claims
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1. A method of designing a golf club head by using a computer, comprising the steps of:
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preparing a ball model and a club head model obtained by dividing a golf ball and a golf club head into a plurality of finite elements respectively, wherein said club head model is provided with a central reinforcing rib formed at a central portion of a rear surface of a face part thereof and a plurality of belt-shaped reinforcing ribs extended radially from said central reinforcing rib toward a peripheral edge of said rear surface of said face part;
executing simulation of collision between said ball model and said club head model at a plurality of positions of a front surface of said face part thereof to determine a Mises stress generated at each of said collision positions; and
changing setting conditions of said central reinforcing rib and said belt-shaped reinforcing ribs to set a maximum value of Mises stresses generated at off-center positions of said front surface of said face part to less than 1.3 times a maximum value of a Mises stress generated at a center of said front surface of said face part. - View Dependent Claims (2, 3, 4, 5, 8, 11, 14, 17, 18)
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6. A golf club head, wherein a central reinforcing rib is formed at a central portion of a rear surface of a face part and not less than four nor more than 10 belt-shaped reinforcing ribs are extended radially from said central reinforcing rib toward a peripheral edge of said rear surface of said face part;
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a maximum value of Mises stresses generated by collision between a golf ball and said golf club head at off-center positions of a front surface of said face part is set to less than 1.3 times a maximum value of a Mises stress generated by collision between said golf ball and said golf club head at a center of said front surface thereof. - View Dependent Claims (9, 12, 15)
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7. A golf club head in which a central reinforcing rib is formed at a central portion of a rear surface of a face part and not less than four nor more than 10 belt-shaped reinforcing ribs are extended radially from said central reinforcing rib toward a peripheral edge of said rear surface of said face part;
- a ratio (W/t) of a width W of each of said belt-shaped reinforcing ribs to a height t thereof is set to not less than 15 nor more than 40; and
each of said belt-shaped reinforcing ribs forms an intersection angle of not less than 100 degrees nor more than 160 degrees with respect to a reference plane of said rear surface of said face part. - View Dependent Claims (10, 13, 16)
- a ratio (W/t) of a width W of each of said belt-shaped reinforcing ribs to a height t thereof is set to not less than 15 nor more than 40; and
Specification