Golf Club Head Turnback Groove Press Forming
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Solution Overview
Problem
The production efficiency of golf club heads with larger turnbacks in the front-back direction is hindered by the difficulty in bending the flat-plate-like parts during press working, which affects the rebound performance.
Innovation Solution
A golf club head design featuring a hollow structure with a cup-shaped face member and a groove along the boundary of the turnback, allowing for easier bending during press working, and a manufacturing method that includes forming a groove on the flat-plate-like part before press working to facilitate the formation of the turnback, improving production efficiency and rebound performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the dimension of the turnback is increased to improve rebound performance, then the rebound performance is improved, but the production efficiency deteriorates due to difficulty in bending during press working
Solution Approach 1:
A groove is formed on the flat-plate-like part before press working to facilitate subsequent bending. This preliminary action creates a predetermined deformation path that enables easier formation of large-dimension turnbacks during press working, resolving the contradiction between turnback size and manufacturing efficiency
Solution Approach 2:
The flat-plate-like part is segmented by introducing a groove that divides the material structure. This segmentation creates a designated bending zone that allows the turnback to be formed more easily during press working, enabling larger turnback dimensions without compromising production efficiency
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 enhances production efficiency and rebound performance by allowing for the formation of larger turnbacks while maintaining durability, as demonstrated by improved defect rates and restitution coefficients in comparison tests.
Implementation Method 1
a face member which integrally includes a face portion having a club face for hitting a ball, and a turnback extending backwardly of the head from a peripheral edge of the club face, wherein the face member is a press-formed part whose turnback is bent by press working
Data Source
AI summary
A golf club head has a hollow therein and a head volume of not less than 100 cc and less than 350 cc. The head comprises a head main body and a substantially cup-shaped face member which are united with each other. The face member integrally includes a face portion having a club face for hitting a ball, and a turnback extending backwardly of the head from a peripheral edge of the club face. The inner surface of the face member is provided with a groove extending along the boundary of the turnback with the face portion. The face member is a press-formed part whose turnback is bent by press working.