Laser Beam and Gas Jet Axis Alignment Detection
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Solution Overview
Problem
In laser machining processes, maintaining the optimal relative positioning between the laser beam axis and the gas jet axis is challenging due to factors like contamination of the laser nozzle, leading to suboptimal machining results.
Innovation Solution
A method involving a laser beam position indicator and a gas jet position indicator, which are moved relative to axial position detection elements to determine and adjust their alignment, utilizing existing movement control systems of the laser machine tool, allowing for precise and user-friendly determination of the relative positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the laser beam axis and gas jet axis are manually aligned using conventional methods (camera detection or tape shot method), then the initial positioning can be achieved, but the alignment precision deteriorates over time due to nozzle contamination and operational variations
Solution Approach 1:
The system performs self-alignment by automatically detecting the relative positions of the laser beam axis and gas jet axis using position detection elements, eliminating the need for manual intervention and maintaining consistent alignment precision over time
Solution Approach 2:
The system continuously monitors the relative positions of the laser beam and gas jet axes using position detection elements and provides feedback to the control unit, which automatically adjusts the positioning to maintain optimal alignment despite operational variations or contamination
2Measurement precision
If additional specialized equipment is added to maintain alignment precision, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
The position detection elements serve multiple functions: they detect the relative positions of both the laser beam axis and gas jet axis, and their signals are used for both alignment determination and automatic positioning control, eliminating the need for separate specialized alignment equipment
Solution Approach 2:
The system combines the alignment detection function with the existing position detection elements already present in the laser machining system, merging multiple functions into existing components rather than adding separate specialized equipment
3Measurement precision
If frequent manual realignment is performed to maintain optimal positioning, then alignment accuracy is preserved, but productivity decreases
Solution Approach 1:
The system continuously monitors and maintains the relative positions of the laser beam and gas jet axes throughout operation using automatic detection and adjustment, eliminating the need to stop machining for realignment and maintaining continuous productive operation
Solution Approach 2:
The system automatically detects and corrects alignment deviations without requiring manual intervention, maintaining optimal alignment accuracy throughout the machining process without interrupting productivity
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
Enables high-precision and efficient adjustment of the relative positions of the laser beam and gas jet axes, ensuring optimal machining conditions and minimizing the need for additional equipment or complex setup procedures.
Implementation Method 1
In different types of laser machining of workpieces, in addition to a laser machining beam a process gas jet is directed onto the machining point
Implementation Method 2
During infeed of oxygen as the process gas, the cutting process is additionally assisted by oxidation processes at the machining point
Implementation Method 3
causing relative motion between the position indicators and a position detection element, such that the position indicators traverse at least a leading edge of the position detection element, while detecting when each of the two position indicators engages the position detection element
Data Source
AI summary
Determination of the relative positioning of a laser machining beam and a process gas jet on a laser machine tool are accomplished by motion of detections made while moving the machining beam and gas jet in relation to a detection element. In some cases actions of the beam and gas jet themselves are detected, such as by cutting light response and sensor deflection caused by the gas jet. Relative head positions at the time of the deflections are used to calculate misalignment between the laser beam and gas jet.