Laser Processing Device Reflected Beam Intensity Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Laser processing of metal materials like steel or aluminum often results in high-intensity reflected beams that can damage the laser oscillator or optical system, and existing methods either fail to control this reflection effectively or compromise processing quality by altering the irradiation angle.
Innovation Solution
A laser processing device with a reflected beam intensity detecting system that gradually increases the laser beam intensity and selects subsequent processes based on the detected intensity changes, allowing for efficient start-up of laser processing while minimizing adverse effects from reflected beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the laser beam is vertically irradiated onto the object to maintain processing quality, then the processing quality is improved, but the reflected beam intensity increases causing damage to the laser oscillator
Solution Approach 1:
The patent applies preliminary action by gradually increasing the laser beam intensity from a low initial level before reaching the final processing intensity. This gradual intensity increase allows the system to establish stable laser processing conditions first, then progressively build up to the required processing power, thereby preventing excessive reflected beam intensity from damaging the laser oscillator while maintaining processing quality
Solution Approach 2:
The patent implements periodic action through multi-stage intensity increase processes with intermediate pauses. The laser beam intensity is increased in discrete stages (e.g., first intensity increase, second intensity increase) with detection and judgment steps in between, allowing the system to monitor reflected beam levels and adjust accordingly, thus preventing damage while achieving processing quality
2Productivity
If the laser beam intensity is increased to improve processing efficiency, then the productivity is improved, but the reflected beam intensity increases causing damage to the laser oscillator
Solution Approach 1:
The patent applies preliminary action by establishing stable processing conditions through gradual intensity increase before achieving high productivity. The system progressively builds up laser power in controlled stages, ensuring that processing efficiency improves only after stability is confirmed at each stage, thereby preventing reflected beam damage
Solution Approach 2:
The patent implements feedback mechanisms by detecting reflected beam intensity at multiple stages and using this information to control subsequent intensity increases. The detection means monitors reflected beam levels, and the control means adjusts the intensity increase rate or pauses based on detected values, creating a closed-loop system that maintains productivity while preventing damage
3Object-affected harmful factors
If the irradiation angle is changed to reduce reflected beam intensity, then the reflected beam intensity is reduced, but the processing quality deteriorates
Solution Approach 1:
The patent applies parameter changes by controlling the temporal profile of laser beam intensity rather than changing the spatial irradiation angle. Instead of altering the geometric parameter (angle), the system changes the temporal parameter (intensity over time) through gradual intensity increase, thereby reducing reflected beam intensity while maintaining vertical irradiation for processing quality
4Productivity
If a tentative processing condition is used to start laser processing, then the productivity is improved, but the reflected beam intensity may exceed safe levels
Solution Approach 1:
The patent applies preliminary action by implementing a preparatory intensity increase phase before full processing begins. The system performs preliminary actions of gradual intensity building with detection and judgment steps, establishing safe operating conditions before transitioning to high-productivity processing, thereby preventing reflected beam damage
Solution Approach 2:
The patent implements dynamics by making the laser beam intensity a dynamic variable that changes over time according to detected conditions. The intensity increase rate is adjusted dynamically based on reflected beam detection results, allowing the system to adapt between safety and productivity requirements in real-time
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 device effectively reduces the impact of reflected beams on the laser system and maintains processing quality by dynamically adjusting the laser beam intensity and processing parameters, preventing damage and ensuring consistent operation.
Implementation Method 1
a light condense optical system configured to condense the laser beam irradiated from the laser oscillator
Implementation Method 2
a reflected beam intensity detecting part configured to detect an intensity of a reflected beam, which is a part of a laser beam irradiated from a laser oscillator via a laser optical system and then is reflected by a surface of the object
Data Source
AI summary
A laser processing device for efficiently starting laser processing, while eliminating an adverse effect due to a reflected laser beam from a workpiece. The laser processing device detects an intensity of a reflected beam, which is a part of a laser beam irradiated from a laser oscillator and then is reflected by a workpiece surface, continuously increases an intensity of the irradiating laser beam over a predetermined period of time, selects a content of a next process, based on a temporal change in the intensity of the detected reflected beam, and executes the next process subsequent to the laser processing, based on the selected content of the next process.