Golf Iron Scoreline Profile Control via Media Blasting and Paint Filling
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Solution Overview
Problem
Existing golf club heads with scorelines that do not meet the 2010 competition requirements, characterized by sharp edges and large cross-section areas, are rendered unusable due to the impracticality of modifying them using traditional manufacturing methods such as recasting, re-engraving, or re-pressing, especially when assembled into clubs.
Innovation Solution
A method involving media blasting to abrade the scoreline edges and applying clear paint to reduce edge sharpness and cross-section area, allowing for controlled modification to meet the 2010 competition standards by adjusting the edge radius and cross-sectional area without the limitations of traditional manufacturing methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If traditional manufacturing methods (recasting, re-engraving, re-pressing) are used to modify scorelines, then the original scoreline geometry can be changed, but the process is impractical and cannot be done when the head is assembled into a club
Solution Approach 1:
The modification process is segmented into distinct operations: media blasting to remove material and create edge radius, followed by paint filling to add material and control cross-section area. This segmentation allows each operation to be optimized independently and makes the process suitable for assembly-line production where clubs are modified after assembly.
Solution Approach 2:
Paint is used as an intermediary material to add substance to the scoreline grooves. The paint fills the grooves and can be controlled to achieve the precise cross-section area reduction required by the 2010 rules, something that cannot be achieved by material removal alone.
2Manufacturing precision
If scoreline edges are modified to increase edge radius, then the 2010 condition of competition is satisfied, but material removal is required which is challenging for hard materials like stainless steel, carbon steel, titanium and maraging steel
Solution Approach 1:
Traditional mechanical methods of material removal (milling, grinding, machining) are replaced with media blasting, which uses kinetic energy of abrasive particles to erode material. This substitution enables effective material removal from hard materials like titanium and maraging steel without requiring complex mechanical tooling or fixturing.
Solution Approach 2:
The edge radius is controlled by adjusting parameters of the media blasting process including abrasive particle size, blasting pressure, blasting angle, and number of passes. These parameter changes allow precise control of the edge radius to meet the 2010 specification without changing the fundamental blasting mechanism.
3Manufacturing precision
If scoreline cross-section area is reduced to meet 2010 requirements, then the condition of competition is satisfied, but material must be added to the scoreline which cannot be done by original manufacturing methods
Solution Approach 1:
Paint serves as an intermediary material that can be precisely applied to control the scoreline cross-section area. By controlling the paint application thickness and fill level, the exact cross-sectional geometry required by the 2010 rules can be achieved.
Solution Approach 2:
The scoreline becomes a composite structure combining the metal groove with the paint filling. This composite approach allows the scoreline to have the desired cross-section area while maintaining the structural integrity of the original metal groove.
4Reliability
If scorelines are overly modified to ensure compliance, then the 2010 condition is satisfied, but ball spin generation becomes ineffective due to excessive edge softening or area reduction
Solution Approach 1:
The process includes measurement and inspection steps to monitor edge radius and cross-section area, providing feedback to control the modification process. This feedback mechanism ensures that modifications stay within the optimal range for both compliance and performance, preventing excessive edge softening or area reduction that would harm ball spin generation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method effectively transforms scorelines to satisfy the 2010 competition conditions by reducing edge sharpness and cross-section area, making previously unusable clubs viable, while ensuring effective ball spin generation through precise control of edge softening and area reduction.
Implementation Method 1
media blasting to abrade the scoreline edges
Implementation Method 2
applying clear paint to reduce edge sharpness and cross-section area
Data Source
AI summary
A manufacturing method for iron-type golf club heads wherein the scorelines of the iron-type golf club heads are media blasted and partially filled with clear paint to adjust the profile to a desired configuration that satisfies the 2010 condition of competition for golf clubs as set forth by the ruling bodies of golf.