Curved Laser Welding Waveguide for Uniform Seam Energy
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Solution Overview
Problem
Existing waveguides for plastic welding suffer from high energy losses and non-uniform energy distribution, which can lead to inefficiencies and inconsistencies in the welding process.
Innovation Solution
The development of negative and positive waveguides with continuously curved concave inner faces, which guide laser light through a cavity or solid state, respectively, to minimize interaction between laser beams and ensure homogeneous power density distribution at the welding seam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional waveguides with straight or simple curved inner faces are used, then the device structure is simple, but energy losses are high and energy distribution is non-uniform
Solution Approach 1:
The waveguide employs a continuously curved concave inner face instead of straight or simple curved surfaces. This specific curvature profile causes laser beams to follow a controlled path along the waveguide, reducing beam interaction and minimizing energy losses through repeated reflections.
Solution Approach 2:
The inner face of the waveguide has a specifically designed continuously curved concave shape with varying radius of curvature along its length. This local variation in geometric properties optimizes the laser beam path at different positions, ensuring minimal energy loss and uniform energy distribution at the welding seam.
2Manufacturing precision
If conventional waveguides are used, then the structure is simple, but energy distribution at the welding seam is non-uniform
Solution Approach 1:
The continuously curved concave inner face with specifically designed radius of curvature variation ensures that laser beams maintain a consistent path and spacing throughout the waveguide. This results in uniform energy distribution at the welding seam, eliminating the focal points and hot spots caused by beam interaction in conventional waveguides.
Solution Approach 2:
The waveguide's inner face geometry is optimized by continuously varying the radius of curvature parameter along its length. This parameter change ensures that the distance between reflected laser beams remains constant, achieving uniform energy distribution at the welding seam while compensating for tolerances.
3Productivity
If waveguides with continuously curved concave inner faces are used, then energy losses are reduced and energy distribution is homogeneous, but the manufacturing complexity increases
Solution Approach 1:
The continuously curved concave inner face can be manufactured using precision CNC machining or molding techniques. The specific curvature profile is designed to be continuously differentiable, which simplifies the manufacturing process while achieving the desired optical performance of minimal beam interaction and uniform energy distribution.
Solution Approach 2:
The radius of curvature parameter is continuously varied along the waveguide length according to a predetermined function. This systematic parameter change allows for precise control of the laser beam path and can be implemented through computer-aided manufacturing processes, balancing manufacturing complexity with welding efficiency.
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
These waveguides reduce energy losses and enhance energy transfer to the welding seam, allowing for more precise and efficient plastic welding with improved tolerance compensation and increased welding seam strength.
Implementation Method 1
a first and a second inner face which are arranged between the entry end and the exit end, which are arranged opposite to each other and by means of which laser light can be reflected
Data Source
AI summary
A waveguide for plastic welding has an entry end, an exit end as well as a first and a second inner face arranged between the entry end and the exit end, which are arranged opposite to each other and by means of which laser light can be reflected. A first distance between the entry end and the exit end defines a length of the waveguide and a second distance between the first and the second inner face defines a thickness of the waveguide. The exit end may be arranged opposite to the entry end and a central plane of the waveguide may extend centrally from the entry end to the exit end. The first inner face comprises a continuously curved, concave shape so that a third distance between the first inner face and the central plane varies continuously from the entry end in the direction of the exit end.