Segmented Glass Cutting Wheel for Deep Fissure Scoring
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Solution Overview
Problem
Conventional small glass cutting wheels fail to produce deep, high-quality fissures that extend through the entire thickness of thin glass plates, leading to suboptimal edge quality and increased rejects in flat display manufacturing, while laser cutting techniques are complex and limited in productivity.
Innovation Solution
A small glass cutting wheel with intermediate tooth spaces having a cutting edge, where the cutting edges are laterally spaced from the wheel's lateral surfaces and converge towards the main center plane, allowing for deep fissures that fully cut through the glass plate with minimal lateral chipping and optimal edge quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional small glass cutting wheels are used to score glass plates, then the scoring operation can be performed, but the fissures produced do not extend through the entire thickness of the glass plate, resulting in inferior edge quality
Solution Approach 1:
The cutting wheel is segmented into multiple cutting teeth arranged circumferentially, with each tooth having a specific height and circumferential extension. The intermediate tooth spaces are strategically designed to create a distributed cutting pattern that produces deep fissures extending through the entire glass thickness while minimizing lateral chipping.
Solution Approach 2:
Different regions of the cutting wheel have different properties: the cutting teeth have height and circumferential extension exceeding random surface roughness to create deep fissures, while the intermediate tooth spaces are designed with specific dimensions to control the fissure pattern. This local differentiation optimizes both fissure depth and edge quality.
2Manufacturing precision
If cutting force is increased to produce deeper fissures, then fissure depth improves, but edge quality deteriorates due to increased lateral chipping
Solution Approach 1:
The cutting wheel distributes the cutting action across multiple segmented teeth rather than a single continuous cutting edge. This segmentation allows the cutting force to be distributed, creating deep fissures through the glass thickness while the intermediate spaces between teeth prevent excessive lateral chipping that would occur with a continuous cutting edge.
Solution Approach 2:
The circumferentially arranged cutting teeth create a periodic cutting action as the wheel rotates, with each tooth producing a fissure segment. This periodic action builds up a deep continuous fissure through the glass thickness while the periodic intermediate spaces provide regular intervals that control and minimize lateral chipping.
3Manufacturing precision
If laser cutting techniques are used to achieve high edge quality, then edge quality improves, but device complexity and productivity limitations arise
Solution Approach 1:
The patent replaces complex laser cutting apparatus with a mechanically simple cutting wheel that achieves comparable edge quality. The cutting wheel with its specifically designed teeth and intermediate spaces provides a mechanical solution that eliminates the need for complex laser systems while maintaining high manufacturing precision.
Solution Approach 2:
The cutting wheel is designed as a simple, replaceable mechanical component that can be manufactured at low cost. Instead of investing in expensive laser cutting equipment, the system uses affordable cutting wheels that can be replaced when worn, significantly reducing device complexity and investment costs.
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
The solution enables the production of glass plates with excellent edge quality and negligible rejects, suitable for thin glass applications like flat monitors and electronic devices, by minimizing lateral chipping and ensuring deep fissures extend through the entire thickness.
Implementation Method 1
the cutting wheel has a radial peripheral line which defines an outer periphery of the wheel and lies in a main plane of the wheel and has at least partially formed a cutting edge
Implementation Method 2
by performing a scoring operation with such glass cutting wheels deep fissures having a comparatively large depth can be produced, which practically extend over the entire thickness of the flat display glass plate
Data Source
AI summary
A small glass cutting wheel for producing a scribed predetermined breaking line, wherein the cutting wheel has a radial peripheral line which defines an outer periphery of the wheel and which lies in a main plane of the wheel and at least partially forms a cutting edge. The cutting edge includes cutting teeth which are circumferentially spaced from each other by intermediate tooth spaces and the height and/or circumferential extension of the cutting teeth exceeds a surface roughness. A small glass cutting wheel for manufacturing flat displays can be manufactured with an improved edge quality so that rejected glass plate pieces can be reduced. At least a part or preferably all intermediate tooth spaces include a cutting edge. Preferably, the cutting edges of the intermediate tooth space and the cutting edges of the teeth are arranged approximately in the same main plane of the small wheel.