Golf Club Face Line Geometry for Foreign Matter Discharge
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Golf club faces lines are prone to foreign matter accumulation, such as mud and sand, which reduces performance and cutter durability, and existing methods for forming face lines do not adequately address these issues while conforming to rules.
Innovation Solution
A golf club head design featuring a face line with specific geometric parameters, including a curvature radius and depth, that enhances foreign matter discharge and spin performance while maintaining cutter durability, achieved through cutting processing using a cutter with optimized curvature radii and shapes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the edge of the face line is sharpened to increase backspin rate, then spin performance is improved, but the sharp edge is not preferable for conformity to rules
Solution Approach 1:
The invention applies different geometric characteristics to different parts of the face line cross-section. The inner radius R1 (curvature of the groove surface) is optimized independently from the outer radius r1 (roundness of the groove edge). This allows the groove to have a shape that promotes ball spin while the edge roundness ensures compliance with golf rules that prohibit sharp edges.
2Reliability
If foreign matters enter into the face line, then performance of the face line is reduced, but existing face line designs do not effectively discharge foreign matters
Solution Approach 1:
The invention applies curvature to the groove surface with an inner radius R1 that is larger than the groove depth T1. This curved surface design allows foreign matters to be more easily discharged from the groove compared to conventional sharp-angled groove designs, reducing the harmful effects of foreign matter accumulation while maintaining effective spin generation.
3Manufacturing precision
If cutting processing is used to form the face line for excellent dimensional accuracy, then manufacturing precision is improved, but the cutter is apt to be damaged reducing productivity
Solution Approach 1:
The invention optimizes the cutter geometry by specifying different radius values for different parts of the groove cross-section. The inner radius R1 and outer radius r1 are independently controlled, allowing the cutter to maintain structural integrity while achieving the desired groove shape. This reduces cutter damage and extends tool life.
Solution Approach 2:
The invention defines specific parameter ranges for the groove geometry, particularly that the inner radius R1 should be greater than the groove depth T1, and the outer radius r1 should be smaller than R1. These parameter relationships ensure that the groove has adequate structural strength to resist cutter damage during machining while maintaining the functional performance required for ball spin.
Data Source
AI summary
A golf club head 2 includes a face line 8 having a depth of D1 (mm) and a land area LA. When a boundary point between the land area LA and the face line 8 in a section line of a surface of the face line 8 is defined as Pa; a point of which a depth is T1 (mm) is defined as Pb; and a curvature radius of the section line between the point Pa and the point Pb is defined as R1 (mm), the golf club head 2 satisfies the following formulae (1) and (2):R1>T1 (1)0.10≦T1≦0.5 (2)Preferably, a ratio (R1/T1) is greater than 1.0 and is equal to or less than 3.0.