Golf Club Head Mass Distribution for Forgiveness and Shot Control
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Solution Overview
Problem
Golf club manufacturers face challenges in enhancing forgiveness, playability, feel, and sound while adhering to USGA regulations, and conventional composite face plates suffer from defects like porosity, fiber delamination, and inadequate durability, especially under dynamic loads.
Innovation Solution
A composite face plate with a varying thickness profile is formed using prepreg plies arranged in a crisscross pattern, with overlapping strips to create a 'volcano' or annular projection, and water-jet cutting is used to minimize defects, combined with a textured striking surface for improved durability and performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a non-metallic striking plate is used to reduce weight and increase forgiveness, then the moment of inertia increases and forgiveness improves, but the durability and strength of the striking plate deteriorates
Solution Approach 1:
The striking plate is constructed using composite materials, specifically a carbon fiber reinforced polymer matrix, which provides both the high moment of inertia needed for forgiveness and the structural strength required for durability. The composite structure allows optimization of both mechanical properties simultaneously.
Solution Approach 2:
The striking plate features variable thickness and material density distribution, with reinforced zones in high-stress areas and lighter zones in low-stress areas. This local quality optimization maintains strength where needed while maximizing moment of inertia overall.
2Volume of moving object
If the club head size is increased to improve forgiveness, then the moment of inertia increases, but the control and precision of shot direction deteriorates
Solution Approach 1:
The club head incorporates strategically positioned counterweights that balance the increased mass distribution from the larger club head size. These counterweights are placed to optimize the center of gravity location, maintaining control and precision while preserving the forgiveness benefits of the larger size.
Solution Approach 2:
The club head design incorporates dynamic balance characteristics that adapt to the golfer's swing pattern. The mass distribution is optimized to provide stability during the swing while maintaining maneuverability and control at impact.
3Reliability
If a variable thickness face plate is used to optimize performance characteristics, then the coefficient of restitution improves, but the manufacturing complexity increases
Solution Approach 1:
The variable thickness face plate is manufactured using preliminary molding techniques where the desired thickness profile is built into the mold cavity. This preliminary action during manufacturing eliminates the need for complex post-processing operations to achieve the variable thickness geometry.
Solution Approach 2:
The face plate manufacturing process merges multiple operations into a single integrated molding process. The variable thickness profile, reinforcement structures, and surface characteristics are all formed simultaneously in one manufacturing step, reducing overall complexity.
4Reliability
If sophisticated materials and engineering are used to improve performance, then forgiveness and playability improve, but the cost and manufacturing difficulty increase
Solution Approach 1:
The club head utilizes composite materials that can be manufactured using conventional composite manufacturing processes such as resin transfer molding and autoclave curing. These processes, while sophisticated, are well-established in the aerospace and automotive industries and can be adapted to golf club manufacturing with appropriate tooling.
Solution Approach 2:
The club head is designed as an integrated composite structure that can be manufactured as a single piece or in manageable segments that are subsequently joined. This segmentation approach simplifies the manufacturing process while maintaining the performance benefits of sophisticated materials and engineering.
Data Source
AI summary
A golf club head and golf club having large head dimensions, and large face characteristics, as well as unique mass property attributes driven by relationships not often considered in conventional club head design, to achieve a resistance to squaring the club head during a golf swing that is comfortable to the novice golfer, while increasing stability during off-center impacts and obtaining preferred launch characteristics. This is achieved in part via establishing a club head configuration and associated weight distribution to yield a center of gravity location that results in a preferred magnitude of Delta1 and Delta2 values, CG angle, moments of inertia, and associated ratios, relationships, and club head mass property characteristics influenced by these variables to achieve improved performance.