Laser Processing Head Closed Route Cutting Control
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Solution Overview
Problem
Conventional laser processing methods for forming closed holes in sheet materials often result in incomplete cuts, leading to projections that require manual removal and thermal dross deposition, especially at high speeds, making precise perforation challenging.
Innovation Solution
A laser processing machine equipped with a control device that executes a closed route cutting process, where the laser processing head moves along a predetermined path, ensuring complete cuts without projections and minimizing thermal concentration by adjusting speed and interrupting laser irradiation, thereby preventing dross deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the processing route is defined offset inwardly from the inner periphery of the target hole, then the processing can be completed, but the processing route becomes incompletely closed and projections remain on the back surface
Solution Approach 1:
A pierced hole is formed at an arbitrary site of the sheet material portion before the cutting process along the closed route. This preliminary action allows the cutting to start from a defined point and ensures the processing route can be completely closed without leaving projections on the back surface.
Solution Approach 2:
The patent replaces the conventional mechanical drilling or punching method with a laser-based cutting system. The laser beam can precisely follow the closed processing route and completely cut through the sheet material, eliminating the projection problem that occurs with mechanical methods when using offset routes.
2Productivity
If the processing speed is increased for high-speed cutting, then productivity improves, but thermal concentration occurs and dross deposits on the rear surface
Solution Approach 1:
The laser beam is applied periodically along the closed processing route, with the laser processing head returning to the start position after completing one cycle. This periodic action with precise control allows high-speed cutting while managing thermal concentration to prevent dross deposition.
Solution Approach 2:
The control device controls the laser oscillator and moving mechanism to precisely follow the closed processing route. The system incorporates feedback control to maintain accurate positioning and laser parameters, ensuring complete cuts without thermal concentration-induced dross even at high speeds.
3Manufacturing precision
If the processing route is completely closed with start and terminating points coinciding, then the hole formation is complete, but projections still remain on the back surface
Solution Approach 1:
The patent introduces a third dimension by forming a pierced hole at an arbitrary site before executing the closed route cutting. This dimensional approach allows the laser to completely traverse the closed route from the pierced hole, ensuring cuts reach the back surface without leaving projections, while maintaining route closure.
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 high-speed, precise perforation with no projections and reduces post-processing needs, ensuring smooth holes without thermal dross, thus improving the efficiency and accuracy of the laser processing method.
Implementation Method 1
a laser beam for thermal cutting purpose
Implementation Method 2
thermal cutting purpose
Data Source
AI summary
A laser processing machine employs a step of forming a pierced hole at a sheet material portion on an inner or outer side of a closed route when a processing to form a hole in the sheet material by cutting along a closed route is carried out. Following this pierced hole a step to perform a cutting process to cut to a predetermined position with a center of the laser beam traversing the closed route and a step of returning, in a condition in which laser irradiation is interrupted, a position of the laser processing head relative to the sheet material to assume a start position lying on the route during a step of cutting to the predetermined position and on the closed route are employed. Thereafter, a step of performing the cutting process from the start position along the closed route is carried out.