Golf Putter Head Hardness Gradient Manufacturing

The patent applies different hardness characteristics to different regions of the ball hitting panel. The toe and heel portions are designed with higher surface hardness than the middle portion, creating a hardness gradient distribution. This local differentiation allows the toe and heel areas to maintain stable ball speed and movement distance despite off-center impacts, thereby improving fault tolerance while preserving ideal performance at the sweet spot.

The patent changes the physical parameter of surface hardness across different regions of the ball hitting panel through heat treatment processes (solution treatment and quenching). By controlling the hardness parameter to be higher at the toe and heel portions and lower at the middle portion, the invention achieves consistent ball performance across various impact locations, resolving the contradiction between hitting precision and fault tolerance.

Instead of adding embedded materials to the middle portion, the patent applies local quality differentiation through hardness variation across the entire ball hitting panel surface. The toe and heel portions have higher surface hardness achieved through controlled heat treatment, while the middle portion maintains lower hardness. This approach directly addresses the root cause of dispersion by ensuring stable ball speed across all impact zones without introducing foreign materials that fail to resolve the fault tolerance issue.

The patent changes the surface hardness parameter of the ball hitting panel through heat treatment processes rather than adding embedded materials. The solution treatment and quenching processes create a hardness gradient where toe and heel portions exhibit higher surface hardness, stabilizing ball speed and movement distance across different impact locations. This parameter change approach achieves both improved ball control precision and enhanced fault tolerance without the limitations of embedded material solutions.

The patent implements local quality differentiation by creating a hardness gradient across the ball hitting panel through controlled heat treatment. The toe and heel portions are subjected to solution treatment and quenching to achieve higher surface hardness, while the middle portion maintains lower hardness. This regional differentiation improves fault tolerance by ensuring stable ball performance on off-center hits, while the heat treatment process itself remains a standard manufacturing technique that does not significantly complicate production.

The patent changes the surface hardness parameter of specific regions (toe and heel portions) through heat treatment processes. By controlling the hardness parameter to be higher at the edges and lower in the center, the invention achieves both improved reliability (fault tolerance) and acceptable ease of manufacture, as the heat treatment process is a established industrial technique that can be integrated into existing manufacturing workflows.