Watch Component Laser Texturing for Faster Low-Glare Patterning
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Solution Overview
Problem
The existing method for forming patterns on metal surfaces using femtosecond laser irradiation is inefficient due to high-density laser irradiation, resulting in prolonged processing times and low productivity.
Innovation Solution
A manufacturing method involving alternating irradiation and movement of a pulse laser along intersecting directions with a predetermined pitch width, where the pitch width is greater than the spot diameter of the laser, to form grooves and protruding portions on a metal member, reducing processing time while maintaining aesthetic appearance and controlling light reflection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high-density laser irradiation is used to form patterns on metal surfaces, then the pattern quality and light reflection control are improved, but the processing time per unit area increases significantly
Solution Approach 1:
The patent divides the laser irradiation process into two distinct scanning directions (first direction and second direction intersecting at an angle). The laser scans along the first direction with a certain pitch, then scans along the second direction with a different pitch. This segmentation of the irradiation path allows optimization of each direction's parameters independently, achieving good pattern quality while reducing overall processing time compared to single-direction high-density scanning.
Solution Approach 2:
The patent dynamically adjusts the scanning parameters by using different pitch widths in two different directions. The pitch in the first direction and the pitch in the second direction are independently controllable, allowing the system to adapt the irradiation density dynamically across different regions and directions, thereby optimizing both quality and efficiency.
2Object-affected harmful factors
If high-density laser irradiation is used to form patterns on metal surfaces, then the light reflection suppression is improved, but the productivity decreases
Solution Approach 1:
By segmenting the irradiation into two directions with different pitch widths, the patent creates a cross-hatched groove pattern that effectively suppresses light reflection from the metal surface. The intersecting grooves in two directions provide multiple reflection paths that redirect light away from the observer, achieving good reflection suppression without requiring excessively high irradiation density in a single direction, thus maintaining productivity.
Solution Approach 2:
The patent applies different pitch widths in different directions to create localized variations in groove density. The pitch in the first direction and the pitch in the second direction can be optimized independently based on the specific requirements for reflection suppression and productivity, allowing each direction to contribute differently to the overall light reflection control while maintaining efficient processing.
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 method significantly reduces processing time per unit area, allows for the formation of visually unrecognizable protruding portions, and effectively suppresses light reflection, enhancing productivity and design aesthetics in watch components.
Implementation Method 1
A manufacturing method includes a first repeating step of irradiating a metal member with a pulse laser while relatively moving a laser head and the metal member in a first direction
Data Source
AI summary
A manufacturing method includes a first repeating step of irradiating a base material with a pulse laser, having a spot diameter S, while relatively moving a laser head and the base material in a first direction, moving the laser head by a predetermined pitch width P in a second direction that intersects the first direction, and repeating irradiation by the pulse laser along the first direction and movement of the laser head in the second direction, and a second repeating step of irradiating the base material with the pulse laser while relatively moving the laser head and the base material in the second direction, moving the laser head by the pitch width in the first direction, and repeating irradiation by the pulse laser along the second direction and movement of the laser head in the first direction, wherein S<P<100 μm.