Laser Beam Expansion for Arc-Like Heat Distribution in Welding
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Solution Overview
Problem
Conventional laser welding systems pose challenges for new users due to the unfamiliarity with laser welding techniques, particularly in achieving quality welds and incorporating laser protection features, and existing systems lack the ability to distribute heat like traditional arc welding systems.
Innovation Solution
The integration of a beam expanding optic in laser welding systems to widen the focal point of the laser beam, combined with scanning optics and user interfaces for controlling wobble patterns, mimics the heat distribution of arc welding systems, enhancing the visual appearance and mechanical properties of welds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a conventional laser welding system uses a focused laser beam with a small focal point, then welding speed and precision are improved, but heat distribution is concentrated and difficult to control for users familiar with arc welding
Solution Approach 1:
The patent implements a beam expanding optic that can dynamically adjust the size of the laser beam focal point. This allows the system to transition between a small focused beam for precision work and a larger expanded beam for better heat distribution, making the system adaptable to different welding scenarios and user preferences while maintaining both precision and ease of operation
Solution Approach 2:
The invention changes the physical parameter of the laser beam diameter by introducing a beam expanding optic. This parameter change allows the focal point size to be adjusted, transforming the concentrated heat input into a more distributed heat pattern that resembles arc welding behavior, thereby improving ease of operation for users familiar with traditional welding methods
2Productivity
If a laser welding system uses a small focal point, then welding speed is improved, but heat distribution does not resemble traditional arc welding systems
Solution Approach 1:
The beam expanding optic provides dynamic control over beam size, allowing the system to maintain high welding speed with a small focal point when needed, while also enabling expansion to larger focal points when heat distribution similar to arc welding is desired, thus achieving both productivity and adaptability
Solution Approach 2:
The patent makes the laser welding system multi-functional by enabling it to operate in two distinct modes: a focused high-speed welding mode and an expanded heat-distribution mode. This universality allows the system to adapt to different welding requirements and user techniques, making it versatile enough to accommodate both high-productivity applications and arc-welding-style operations
3Temperature
If a beam expanding optic is added to the laser welding system, then heat distribution is improved, but device complexity increases
Solution Approach 1:
The beam expanding optic serves as an intermediary component between the laser source and the workpiece. This single optical element effectively modifies the beam characteristics to improve heat distribution without requiring complex control systems or multiple components, thereby minimizing the increase in device complexity while achieving the desired thermal effect
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 allows laser welding systems to perform more like traditional arc welding systems, providing improved heat distribution and weld quality, making them more accessible to users accustomed to arc welding.
Implementation Method 1
The welding system includes a beam expanding optic to widen a focal point of the laser beam as applied to the workpiece
Implementation Method 2
The laser beam provides a concentrated heat source, enabling a precise control of the heat input and high welding speed
Implementation Method 3
The laser beam provides a concentrated heat source, enabling a precise control of the heat input
Data Source
AI summary
Systems and methods for laser welding are disclosed. A laser welding system includes a hand held laser welding tool to direct laser power to a workpiece to generate a weld during a laser welding operation. The welding system includes a beam expanding optic to widen a focal point of the laser beam as applied to the workpiece.