Localized Milled Golf Club Face for Tight Bulge and Lower Spin
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Solution Overview
Problem
Conventional metal wood golf club heads face challenges in achieving tight bulge/roll tolerances, leading to variability in club head performance, and require methods to reduce spin imparted on the golf ball, especially in low-lofted club heads.
Innovation Solution
The development of a golf club head with a milled ball striking surface, characterized by new surface parameters such as the ratio of average surface roughness (RA) to surface void parameter (WVoid) and surface contact parameter (WVDCL), which allows for precise control of spin imparted to the golf ball.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional coining and machining processes are used to form the strike plate, then the manufacturing process is simpler, but the bulge and roll tolerances are loose leading to variability in club head performance
Solution Approach 1:
The strike plate is pre-formed with coining and machining to establish base geometry, then milled with specific patterns before assembly. This preliminary preparation enables tighter tolerances in the final product while maintaining manufacturing efficiency.
Solution Approach 2:
The invention changes the surface parameters of the strike plate by introducing milled patterns with controlled average maximum distances, average surface roughness, and surface void parameters. These parameter changes achieve tighter bulge and roll tolerances, reducing variability in club head performance.
2Object-generated harmful factors
If conventional brushing surface finish is applied, then the manufacturing process is simpler, but the spin imparted on the golf ball cannot be sufficiently reduced in low-lofted club heads
Solution Approach 1:
The strike plate surface is treated differently in different regions through milled patterns. The milled surface with controlled roughness and void parameters is applied to specific areas to reduce spin imparted on the golf ball, while maintaining ease of manufacture through standardized milling processes.
3Object-generated harmful factors
If the average surface roughness is increased to reduce spin, then the spin imparted on the golf ball decreases, but the average roughness may become too high affecting other performance characteristics
Solution Approach 1:
The invention precisely controls multiple surface parameters simultaneously: average maximum distance of peaks and valleys, average surface roughness, and surface void parameter. By changing these parameters in combination through controlled milling, the spin imparted on the golf ball is reduced while maintaining optimal performance characteristics.
Data Source
AI summary
A wood-style golf club head includes a strike face and a body that cooperate to define a hollow internal club head volume. The strike face formed from a strike plate having an outer perimeter and a frame surrounding the strike plate. The strike plate is affixed to the frame across the entire outer perimeter. The strike plate and frame define a continuous ball striking surface that has a surface texture characteristic of milling that extends continuously across both the strike plate and the frame.