Brittle Plate Scribing via Support Segmentation and Bending
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Solution Overview
Problem
Existing brittle plate processing methods, such as those for glass plates, face challenges in forming deep scribe lines due to limitations in cutter force, leading to shallow scribe lines and defects like lateral cracks, which hinder the formation of sections perpendicular to the plate surface.
Innovation Solution
A method involving a cutter pressed against the top surface of a brittle plate, supported by a template with a defining part that induces bending deformation, allowing the scribe line to deepen while preventing breakage, by controlling the movement and position of the cutter relative to the template.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a cutter is pressed against the top surface of a brittle plate to form a scribe line, then the scribe line depth increases, but the load on the plate increases causing breakage and defects
Solution Approach 1:
The support function is segmented into two distinct parts: a flat part that provides uniform support across the plate, and a defining part that creates controlled bending deformation. This segmentation allows the plate to experience localized bending only in the region where the cutter acts, rather than requiring high loads across the entire plate, thus enabling deep scribe lines without causing breakage
Solution Approach 2:
The support conditions are changed by introducing a defining part with specific geometric parameters (shape, position, size) that modify the plate's bending characteristics. By adjusting these parameters, the plate's deformation behavior is optimized to concentrate bending in the cutter interaction zone, allowing deep scribe formation at reduced loads
2Manufacturing precision
If the cutter is pressed with sufficient force to form deep scribe lines, then the scribe line quality improves, but defects like lateral cracks occur
Solution Approach 1:
The support member provides different support characteristics in different regions: the flat part provides uniform support to maintain overall plate stability, while the defining part provides localized support that induces controlled bending. This local differentiation allows the cutter to form deep, high-quality scribe lines without generating harmful lateral cracks, as the bending is confined to the intended region
3Stability of the object's composition
If the plate is supported flat on the entire bottom surface, then the plate remains stable, but bending deformation is insufficient for deep scribe line formation
Solution Approach 1:
The support surface is divided into functional zones: the flat part maintains overall plate stability through uniform support, while the defining part introduces controlled bending deformation. This segmentation resolves the contradiction by providing both stability and necessary bending - the flat part ensures the plate doesn't move or vibrate excessively, while the defining part creates the localized bending needed for deep scribe formation
Solution Approach 2:
The defining part acts as an intermediary between the stable flat support and the cutter's bending action. It translates the stable support condition into controlled bending deformation by its geometric configuration, enabling deep scribe lines to form without compromising plate stability
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 enables the formation of deep scribe lines with reduced load on the plate, minimizing defects and allowing for efficient breaking without dividing the plate into multiple regions, thus enhancing the processing efficiency and accuracy.
Implementation Method 1
the shape of the brittle plate due to bending deformation is defined by a defining part of the support member
Data Source
AI summary
A brittle plate processing method includes having a first portion of a brittle plate supported flat on a flat part of a support member that supports a first surface of the brittle plate, pressing a cutter against a second surface of the brittle plate opposite to the first surface, and forming a scribe line in the second surface of the brittle plate by moving the cutter and the support member relative to each other. In pressing the cutter, the cutter is pressed to a predetermined position on a second portion of the brittle plate other than the first portion. When the cutter is pressed to the predetermined position on the second portion of the brittle plate, the shape of the brittle plate due to bending deformation is defined by a defining part of the support member.