Cutting Device Scattering Member for Laser Glass Processing
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Solution Overview
Problem
In cutting devices for brittle materials like glass, managing the heating condition with a laser beam is challenging due to coolant scattering, especially during high-speed machining, leading to inconsistent cutting precision.
Innovation Solution
A cutting device with a scattering member installed at the machining table to receive and scatter coolant, ensuring consistent coolant distribution and equalizing the coolant's influence on the laser beam passage region, allowing for precise control of the heating condition throughout the machining process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a large amount of coolant is injected to cool the workpiece during high-speed machining, then the cooling effect is improved, but the coolant scatters into the laser beam passage region and absorbs laser energy, causing the heating condition to deviate from the predetermined range
Solution Approach 1:
The machining process is divided into two distinct time periods: initial period machining time when only heating treatment is performed, and middle period machining time when both cooling and heating are performed simultaneously in different regions. This segmentation allows the system to manage heating conditions separately for each phase, ensuring precision is maintained despite coolant injection.
Solution Approach 2:
During the initial period machining time, the system performs heating treatment in advance before coolant injection begins. This preliminary heating establishes a baseline heating condition that can be referenced and maintained during subsequent middle period machining when coolant is injected, allowing the heating condition to be managed within the predetermined range throughout the entire process.
2Productivity
If the workpiece is continuously transported through the laser radiation unit and coolant injection unit, then productivity is improved, but it becomes extremely difficult to manage the heating condition within the predetermined range from initial to middle period machining time
Solution Approach 1:
The system dynamically adjusts the machining process based on the workpiece position and machining stage. The heating condition management strategy changes from simple heating in the initial period to coordinated heating and cooling in the middle period, allowing continuous machining while maintaining precision through adaptive control.
Solution Approach 2:
The controller acts as an intermediary that coordinates between the laser radiation unit, coolant injection unit, and workpiece transport system. It manages the timing and intensity of heating and cooling operations to ensure that despite continuous transport, the heating condition remains within the predetermined range throughout both initial and middle period machining times.
3Object-affected harmful factors
If a shield plate is installed between the cooling area and heating area to prevent coolant scattering, then coolant scattering is reduced, but it is still difficult to completely remove the influence of scattered coolant and manage the heating condition within the predetermined range
Solution Approach 1:
The system extracts and separates the heating and cooling operations into distinct spatial and temporal zones. By performing heating treatment in the initial period and then performing both heating and cooling simultaneously in different regions during the middle period, the system removes the harmful interaction between coolant and laser beam that occurs when they overlap, allowing precision to be maintained even with coolant injection.
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 solution enables consistent heating conditions from the initial to the middle period machining time, achieving desired cutting precision by minimizing the impact of coolant scattering on the laser beam, thus maintaining precise cutting performance.
Implementation Method 1
a laser radiation unit configured to radiate a laser beam to a workpiece such as a glass plate or the like to locally heat the workpiece
Implementation Method 2
the scattered coolant absorbs a part of the laser, and the workpiece cannot be sufficiently heated
Data Source
AI summary
Provided is a cutting device including a machining table configured to float a workpiece having a plate shape, a laser radiation unit configured to radiate a laser beam onto the workpiece, a coolant injection unit configured to inject a coolant onto the workpiece, and a moving device configured to relatively move the workpiece with respect to the laser radiation unit and the coolant injection unit in a preset direction. In the cutting device, a scattering member configured to receive injection of the coolant from the coolant injection unit and scatter the coolant is installed at the machining table in front of the workpiece in a moving direction in which the workpiece relatively moves.