Golf Club Head Sole Weight Layout for Easier Internal Welding
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Solution Overview
Problem
The challenge in manufacturing golf club heads is to lower the center of gravity without impairing productivity, as existing methods face difficulties in accurately welding weight members due to limited space and poor workability in narrow locations, which can lead to detachment or abnormal noise during ball impact.
Innovation Solution
A golf club head design with a weight member having a specific gravity greater than the head main body, fixed to the sole portion with a weld at its peripheral edge, and a width in the toe-heel direction that is smaller on the rear side than the front side, allowing for effective positioning of the center of gravity and improved welding workability by inserting a welding torch through the front opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a weight member is added to lower the center of gravity, then the flight distance of the golf ball is increased, but the welding workability is deteriorated due to limited space inside the head main body
Solution Approach 1:
The weight member is designed with an asymmetric shape where the width in the toe-heel direction is smaller on the rear side than on the front side. This asymmetric configuration allows the rear edge to be positioned at a deeper location while maintaining adequate welding access space, resolving the contradiction between achieving low center of gravity and ensuring welding workability
Solution Approach 2:
The patent utilizes the three-dimensional space inside the head main body by positioning the weight member's rear edge at a deeper position along the front-back dimension, while compensating for the reduced welding access in the toe-heel dimension through the asymmetric width design. This multi-dimensional spatial arrangement allows both goals to be achieved
2Weight of moving object
If the rear edge of the weight member is positioned at a deeper location, then the center of gravity is lowered, but the movable range of the welding torch is limited
Solution Approach 1:
The weight member employs asymmetric dimensions where the width at the rear side is deliberately reduced compared to the front side. This design allows the rear edge to extend deeper into the head main body for optimal center of gravity positioning, while the reduced rear width creates sufficient clearance for the welding torch to maneuver and access the welding position
3Manufacturing precision
If skill is required to accurately move the welding torch, then welding precision can be maintained, but productivity is deteriorated
Solution Approach 1:
The patent changes the geometric parameters of the weight member, specifically the width in the toe-heel direction, making it smaller on the rear side. This parameter modification creates improved welding accessibility and larger operational space for the welding torch, thereby enhancing productivity while maintaining welding accuracy through the optimized geometry
4Productivity
If the welding of the weight member is insufficient, then manufacturing time is reduced, but the weight member may detach or generate abnormal noise
Solution Approach 1:
By modifying the width parameter of the weight member to be smaller on the rear side, the patent improves welding accessibility and allows for more complete and reliable welding coverage. This geometric change enables adequate welding quality to be achieved more efficiently, simultaneously improving both reliability and productivity
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
This design effectively lowers the center of gravity while maintaining productivity, enhancing the flight distance of the golf ball and reducing ball spin, without compromising the structural integrity or rebound performance of the club head.
Implementation Method 1
fixing the weight member to the sole portion of the head main body by inserting a welding torch into the inside of the head main body through the front opening of the head main body, and disposing a molten metal at a peripheral edge of the weight member
Data Source
AI summary
A golf club head has an inner cavity and comprises a face member and a head main body which a front opening, which are connected to each other. The head main body comprises a sole portion, and a weight member which has a specific gravity greater than that of the head main body is fixed to an inner surface of the sole portion. A weld which fix the weight member to the sole portion is disposed at the peripheral edge of the weight member. The weight member has the width in the toe-heel direction of the head, which is smaller on its rear side than its front side.