Golf Club Groove Configuration for Spin Control
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Solution Overview
Problem
Conventional golf club heads face limitations in groove geometry and manufacturing processes, leading to inconsistent groove-face interfaces, reduced spin control, and adherence of debris, which affect performance and adherence to regulatory standards.
Innovation Solution
The golf club head features a milled striking face with angled or radiused grooves formed by spin milling or fly cutting, allowing for tighter tolerances, increased production efficiency, and enhanced spin control, while maintaining compliance with regulatory dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If grooves are formed as part of the casting or forging process, then manufacturing is simpler, but the groove-face interface becomes inconsistent along the length of the groove
Solution Approach 1:
The groove formation process is segmented into two distinct operations: first forming the groove cavity during casting/forging, then separately machining the groove-face interface. This segmentation allows each operation to be optimized independently, resolving the contradiction between manufacturing simplicity and interface consistency.
Solution Approach 2:
The groove cavity is preliminarily formed during the casting or forging process before final machining. This preliminary action creates the basic groove structure while leaving the critical groove-face interface to be precisely machined afterward, ensuring both manufacturing efficiency and interface consistency.
2Reliability
If the groove width is increased to maximize spin control, then spin control improves, but the groove width exceeds the USGA limit of 0.035 inch
Solution Approach 1:
The groove parameters (width, depth, angle) are precisely controlled within USGA limits through specialized machining processes. By optimizing the combination of these parameters rather than simply increasing width, the design achieves maximum spin control while maintaining compliance with the 0.035 inch width limitation.
Solution Approach 2:
The groove design incorporates varying characteristics along its length, with different sections having optimized dimensions and angles. This local quality variation allows the groove to maximize spin control effectiveness within the constrained width while adapting to different impact zones on the club face.
3Productivity
If conventional machining processes are used for grooves, then equipment availability is high, but production efficiency is reduced
Solution Approach 1:
Traditional multi-step mechanical machining processes are replaced with specialized single-pass machining techniques. This substitution reduces the number of operations and tool changes required, significantly improving production efficiency while maintaining groove precision.
Solution Approach 2:
Multiple machining operations that were previously performed separately are merged into a single integrated process. This combining of operations eliminates intermediate steps and setup time, enhancing production efficiency without requiring fundamentally new equipment.
Data Source
AI summary
The present invention is directed to a golf club head with an improved striking surface. The grooves are machined into the strike surface with tight tolerances using a profiled cutter. More specifically, the grooves has a radius of curvature R1 and a draft angle θ forming a relationship that satisfies the equation R1≧(1*10−7θ3)−(3*10−5θ2)+0.003θ−0.0891 to achieve a maximum spin performance.