Golf Club Head Solid Rod Stress Distribution
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Solution Overview
Problem
Existing golf club heads do not effectively reduce stress on the striking face section during impact with a golf ball while minimizing mass increase.
Innovation Solution
The method involves co-casting solid rods within the golf club head body using a wax-welding process, where the rods connect the crown and sole portions without touching the striking face, thereby reducing stress during impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If interior structures are added to reduce stress in the striking face section, then ball speed is enhanced through stress distribution, but the mass of the golf club head increases
Solution Approach 1:
The patent applies local quality by positioning solid rods specifically in regions where stress concentration occurs during impact, rather than uniformly distributing structural reinforcement throughout the entire club head. The rods are strategically placed to provide localized stress management in the striking face section, crown portion, and sole portion, achieving effective stress distribution while minimizing overall mass addition.
Solution Approach 2:
The patent employs composite materials by combining solid rods with the golf club head body through co-casting. The solid rods are integrated into the club head structure using a wax-welding process during manufacturing, creating a composite structure that leverages the properties of both the rod material and the club head material to achieve optimized stress distribution with controlled mass increase.
2Manufacturing precision
If solid rods are co-cast using wax-welding process, then manufacturing precision is achieved through integrated casting, but device complexity increases due to additional manufacturing steps
Solution Approach 1:
The patent applies merging by combining the solid rods and the golf club head body into a single integrated component through the co-casting process. Rather than manufacturing the rods and club head separately and assembling them, the wax-welding process allows both elements to be cast together as one unified structure, achieving precise integration while streamlining the manufacturing workflow.
Solution Approach 2:
The patent employs preliminary action by preparing the wax-welding molds and positioning the solid rods in their final locations before the casting process begins. The wax patterns for both the club head body and the solid rods are created and assembled in advance, ensuring precise positioning and integration during the subsequent casting operation, which maintains manufacturing precision while managing process complexity.
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 approach enhances ball speed by distributing stress more efficiently without significantly increasing the club head's mass, improving performance without adding weight.
Implementation Method 1
bonding the solid rod to the body with an adhesive material to form a combined wax mold
Data Source
AI summary
The present invention is directed to a body for a golf club head that includes structural columns or connectors, also referred to as stiffening members, and particularly a pair of solid rods, that extend between a return section and a sole section approximately parallel with a rear surface of a striking face section and parallel with each other without touching the rear surface or one another, even during impact with a golf ball. Each of the solid rods preferably is cylindrical, has a diameter of 0.050 inch to 0.200 inch, and has a length of 1 to 2.5 inches. Each of the rods has an upper end and a lower end. The solid rods preferably have a variable diameter to reduce their overall mass, such that the upper ends and lower ends have diameters that are larger than, and taper towards, a midpoint of the solid rods so that the solid rods each has an approximate hourglass shape.