Glass Plate Edge Chamfering with Zoned Laser Heating
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Solution Overview
Problem
The existing method for chamfering the edge face of a glass plate using a laser beam is inefficient, requiring three steps and increasing the time and reducing the production efficiency of the glass plate.
Innovation Solution
A method involving a two-step process where the glass plate is disposed such that a portion is in a heating space and the rest is outside, with the edge face softened by a laser beam outside the heating space and then heated within it, optimizing rotational speed and heating area to prevent peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the conventional three-step laser chamfering method is used, then the edge face can be made into a target shape, but the production efficiency decreases due to increased processing time
Solution Approach 1:
The glass plate is divided into two spatial zones: a heating space where the entire glass plate is maintained at a predetermined temperature, and a non-heating space where laser beam irradiation is applied. This spatial segmentation allows simultaneous temperature maintenance and localized softening without requiring sequential three-step processing, thereby improving production efficiency while achieving the target edge face shape.
2Manufacturing precision
If the entire glass plate is kept at a predetermined temperature before laser irradiation, then the corner portion can be softened and chamfered, but the total processing time increases
Solution Approach 1:
The entire glass plate is preliminarily heated to a predetermined temperature in the heating space before laser irradiation begins. This preliminary heating action prepares the glass for rapid softening during laser irradiation without requiring subsequent reheating steps, reducing total processing time while ensuring high-quality chamfering.
Solution Approach 2:
The heating space continuously maintains the glass plate at the predetermined temperature throughout the laser irradiation process. This continuous temperature maintenance eliminates the need to cool and reheat between steps, enabling uninterrupted processing and reducing overall processing time while maintaining chamfering quality.
3Productivity
If the glass plate is rapidly cooled after chamfering, then the processing cycle is shortened, but peeling may occur on the edge face
Solution Approach 1:
The glass plate experiences different thermal conditions in different spatial zones: the heating space maintains a high predetermined temperature to prevent peeling during cooling, while the non-heating space allows rapid cooling. This localized thermal quality control enables fast processing cycles without compromising edge face integrity.
Solution Approach 2:
The heating space acts as a thermal cushion that maintains the glass plate at a predetermined temperature during and after laser irradiation. This beforehand temperature maintenance cushions against rapid temperature changes that would cause peeling, allowing the processing cycle to be shortened without sacrificing edge face integrity.
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 improves the production efficiency of the glass plate by reducing the time required for chamfering and preventing peeling, resulting in a smooth, target-shaped edge face.
Implementation Method 1
By irradiating the glass plate with a laser beam in a state where the entire glass member, which is a glass plate, is kept at a predetermined temperature that is higher than room temperature, such that an irradiation spot moves along a corner portion of the glass member over at least a portion of the entire length of the corner portion, at least a portion of the corner portion is heated to a temperature higher than that of the other portion, softened, and chamfered
Implementation Method 2
heating the softened portion of the edge face that has reached the heating space through the rotation
Data Source
AI summary
Chamfering processing for chamfering an edge face of a disk-shaped glass plate includes a step of disposing the glass plate such that a portion of the glass plate is disposed in a heating space for heating the glass plate and the remaining portion is disposed outside the heating space; and a step of softening a portion of the edge face of the glass plate by irradiating a circumferential portion of the edge face with a laser beam outside the heating space while rotating the glass plate in one direction around the center of the glass plate, and heating the softened portion of the edge face that has reached the heating space through the rotation.