Laser Beam Offset Control in Assist Gas Metal Processing
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Solution Overview
Problem
Laser processing of metallic materials faces challenges in achieving high-speed, high-quality results due to the complexity of controlling the interaction between the laser beam and assist gas flow, particularly in maintaining rotational symmetry, which affects process efficiency and accuracy.
Innovation Solution
The method involves breaking the rotational symmetry between the laser beam and assist gas flow by dynamically controlling the position of the laser beam relative to the assist gas flow, using a controlled deformation optical system to shape the laser beam and adjust its power distribution in real-time, allowing for improved precision and efficiency in machining processes without the need for manual mechanical adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rotational symmetry is maintained between laser beam and assist gas flow, then process stability is improved, but processing speed and quality deteriorate
Solution Approach 1:
The patent applies asymmetry by deliberately breaking the rotational symmetry between the laser beam and assist gas flow. The laser beam is positioned offset from the gas flow axis, creating an asymmetric configuration that improves processing speed and quality. This is achieved through controlled deformation optical systems that can dynamically adjust the laser beam position and power distribution relative to the assist gas flow, transforming a traditionally symmetric setup into an optimized asymmetric one.
2Device complexity
If manual mechanical adjustments are used to control laser position, then device complexity is reduced, but manufacturing precision and adaptability deteriorate
Solution Approach 1:
The patent replaces manual mechanical adjustment systems with a controlled deformation optical system. Instead of using mechanical components to physically reposition the laser beam, the invention uses optical means to dynamically control the laser beam position and power distribution. This substitution eliminates complex mechanical adjustment mechanisms while achieving superior positioning precision and adaptability through optical field control.
Solution Approach 2:
The patent implements dynamics by enabling real-time, dynamic control of the laser beam position and power distribution relative to the assist gas flow. The controlled deformation optical system allows the laser parameters to be continuously adjusted during processing, transforming a static mechanical adjustment system into a dynamic optical control system that can adapt to varying processing conditions.
3Manufacturing precision
If high energy density is applied for prolonged time, then welding quality is improved, but productivity deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the laser beam power distribution and position relative to the assist gas flow during processing. The controlled deformation optical system enables real-time modification of energy density parameters, allowing the system to optimize between welding quality and processing speed by varying power distribution patterns and beam positions according to specific processing requirements.
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 approach enhances processing speed, quality, and cost-effectiveness by optimizing the interaction between the laser beam and assist gas flow, reducing gas consumption, and increasing the yield per watt of power, while maintaining precise control over the machining process.
Implementation Method 1
using a controlled deformation optical system to shape the laser beam and adjust its power distribution in real-time
Implementation Method 2
the laser is used as a thermal tool for a wide variety of applications that depend on the interaction parameters of the laser beam with the material being processed
Implementation Method 3
by directing a low energy density (on the order of tens of W per mm2 of surface) for a prolonged time (on the order of seconds), a hardening process is achieved
Implementation Method 4
an assist gas flow must be provided to the working region wherein the interaction between the laser beam and the material occurs which has the mechanical functions of propulsion of the molten material
Data Source
AI summary
A method of laser processing of a metallic material is described. Furthermore, disclosed herein are aspects of a machine for laser processing of a metallic material arranged to implement the laser processing method, and a computer program comprising one or more code modules for implementing the aforementioned method when the program is executed by electronic processing means.