Glass Plate Scribing Dent Initiation for Crack Continuity
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Solution Overview
Problem
Existing glass plate scribing methods struggle to produce continuous vertical cracks from the starting point of scribing, often resulting in splinters and discontinuous cracks due to slippage and surface hardness issues.
Innovation Solution
A method where a dent is formed at the starting point, and the cutter wheel begins scribing from within this dent, ensuring alignment and continuous crack formation, preventing slippage and improving bend-breaking efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If projections are formed on the cutter wheel to prevent slippage, then slippage prevention is improved, but continuous vertical crack formation from the starting point deteriorates
Solution Approach 1:
A dent is formed at the starting point of scribing before the cutter wheel begins scribing. This preliminary action creates a depression that allows the cutter wheel to properly engage with the glass plate surface, enabling both slippage prevention and continuous vertical crack formation from the starting point without requiring projections on the cutter wheel.
2Reliability
If the cutter wheel bites into the glass plate surface, then slippage is prevented, but effective vertical crack formation at the starting point deteriorates
Solution Approach 1:
The dent is created at the starting point before scribing begins, providing a proper engagement surface for the cutter wheel. This allows the cutter wheel to bite into the glass plate effectively for slippage prevention while ensuring that the vertical crack forms continuously from the starting point without the harmful effects of surface biting.
Solution Approach 2:
The dent creates a localized difference in the glass plate surface at the starting point, providing a specific engagement area for the cutter wheel. This local modification enables proper cutter wheel engagement and continuous crack formation without affecting the quality of the scribe line in other regions.
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 allows for continuous vertical crack formation from the starting point, reducing splinter occurrence and enhancing bend-breaking performance along the entire scribe line.
Implementation Method 1
a cutter wheel is rolled on a glass plate while applying pressure thereto to thereby scribe form a scribe line on the glass plate
Implementation Method 2
a dent is first formed at a starting point, and the cutter wheel is made to start scribing from within the dent, so that an effective vertical crack is produced continuously from the starting point
Data Source
Figure 1
Figure 2~4
Figure 5
AI summary
A scribing apparatus 1 includes a horizontal table 3 on which a glass plate 2 is placed and fixed under vacuum suction; a feed screw 5 and a Y-axis control motor 6 for moving the table 3 along a pair of guide rails 4 under scribe numerical control; a guide rail device body 7 installed above the table 3 along an X-axis direction; a carriage 8 mounted on the guide rail device body 7 so as to move in the X-axis direction while being guided; a feed screw and an X-axis control motor 9 for moving the carriage 8 in the X-axis direction under numerical control; and a scribe head 10 installed on the carriage 8.