Laser Serrated Knife Edge Manufacturing Process
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Solution Overview
Problem
Manufacturing knife blades with serrated edges is time-consuming and expensive, as it is challenging to process the edge relative to other portions of the knife blade effectively.
Innovation Solution
Scanning laser light across the knife blade surface to generate heat and melt portions at serration regions, creating serrations by removing the melted material while controlling the melt depth to maintain the integrity of other parts of the blade, allowing for a forgiving process that doesn't require precise control over the edge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional methods are used to create serrations on knife blades, then serrations can be formed to improve cutting ability, but the manufacturing process becomes time-consuming and expensive
Solution Approach 1:
The patent replaces traditional mechanical serration methods (such as grinding or machining) with a laser-based process. The laser beam melts and removes material to create serrations, eliminating the need for complex mechanical tooling and multiple processing steps, thereby significantly reducing manufacturing time and cost while maintaining effective serration geometry
Solution Approach 2:
The patent utilizes controlled changes in laser parameters (power, speed, pulse duration) to achieve precise material removal and create the desired serration pattern. By adjusting these parameters, the process can be optimized for different blade materials and serration requirements, enabling efficient production without sacrificing cutting performance
2Productivity
If laser light is used to melt portions of the knife blade for serration, then manufacturing efficiency is improved, but precise control over the edge processing is challenging
Solution Approach 1:
The patent applies laser energy locally to specific regions of the blade edge where serrations are required. The laser beam can be precisely positioned and controlled to affect only the intended areas, creating localized melting and material removal without impacting adjacent regions, thus achieving both efficiency and precision
Solution Approach 2:
The patent incorporates feedback mechanisms to monitor and control the laser processing in real-time. By sensing parameters such as melt pool characteristics, reflection, or temperature, the system can adjust laser power and scanning speed dynamically to maintain consistent serration quality and precise edge control throughout the manufacturing process
3Force
If high pressure is applied at serration points to improve cutting performance, then cutting ability is enhanced, but the blade material may be damaged or compromised
Solution Approach 1:
The patent creates serrations with partial material removal, leaving sufficient material thickness at each serration point to maintain blade strength. The laser process removes just enough material to create the cutting edges while preserving the structural integrity of the blade, avoiding over-removal that would compromise strength
Solution Approach 2:
The patent utilizes the phase transition of metal from solid to liquid and back to solid during laser processing. The rapid heating and cooling cycles create a hardened surface layer at the serration points, which enhances both the cutting ability and wear resistance while maintaining the overall blade strength through controlled phase transformation
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 facilitates efficient and cost-effective serration of knife blades, providing increased hardness and wear resistance, while allowing for the formation of serrations and functionalizing the sliding surface in a single step, with minimal damage to the blade.
Implementation Method 1
Laser light is scanned across a surface of a knife blade in which the laser light is intersected with an edge thereof. The laser light is used to serrate the edge of the knife blade by generating heat in the knife blade while the laser light is scanned
Implementation Method 2
The laser light is used to serrate the edge of the knife blade by generating heat in the knife blade while the laser light is scanned
Implementation Method 3
melting portions of the knife blade at serration regions at the edge
Implementation Method 4
a re-melted region may be left behind, which subsequently solidifies as it cools
Data Source
AI summary
Various aspects of the present disclosure are directed toward blades having serrations, and methods for forming the serrations. As may be implemented in accordance with one or more embodiments, laser light is scanned across a surface of a knife blade in which the laser light is intersected with an edge thereof. The laser light is used to serrate the edge of the knife blade by generating heat in the knife blade while the laser light is scanned, melting portions of the knife blade at serration regions at the edge, and removing the melted portions. This approach may be carried out without registering an accurate location of the knife edge, and while also melting portions of the knife blade away from the edge.