Hollow Waveguide Laser Welding Without Filler Materials
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Solution Overview
Problem
The existing methods for assembling waveguides from individual sections, such as salt bath soldering, are complex and require high safety precautions, and often necessitate the use of welding filler materials, which complicates the process and may not ensure high-quality connections for high-frequency signal transmission.
Innovation Solution
A method using laser welding to connect waveguide sections made of different aluminum alloys, where one alloy is weldable without additional material and the other requires a filler, allowing for a dynamic melt that forms a sufficient weld seam without additional materials, simplifying the assembly process and ensuring high-quality signal transmission properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If salt bath soldering is used to join waveguide sections, then connection quality is improved, but process complexity and safety requirements increase significantly
Solution Approach 1:
The patent replaces the chemical soldering process (salt bath soldering) with a mechanical/thermal laser welding process. The laser beam directly melts and fuses the aluminum alloy waveguide sections without requiring chemical fluxes or salt baths, thereby maintaining connection quality while eliminating process complexity and safety hazards associated with salt bath soldering.
Solution Approach 2:
The patent changes the fundamental welding parameters by using laser welding instead of soldering. This involves using concentrated laser energy to achieve melting temperatures of aluminum alloys, controlling the thermal process through laser power, speed, and focus parameters, and obtaining direct metal-to-metal fusion rather than solder joint formation.
2Ease of manufacture
If welding filler materials are used to connect aluminum alloys, then weldability is improved, but process complexity and material requirements increase
Solution Approach 1:
The patent extracts and eliminates the filler material requirement from the welding process. By selecting compatible aluminum alloy combinations (such as 6000 series with 5000 series), the process achieves successful welding of dissimilar alloys without requiring additional filler materials, thereby simplifying the process and reducing material requirements.
Solution Approach 2:
The patent utilizes the inherent compatibility between different aluminum alloy series to create a composite weld structure. The dissimilar aluminum alloys (e.g., 6000 series containing magnesium and silicon with 5000 series containing magnesium) form a metallurgically compatible joint through direct fusion, leveraging their compositional similarities to achieve weldability without filler materials.
3Device complexity
If laser welding is used to connect dissimilar aluminum alloys, then process simplicity is improved, but achieving sufficient melt dynamics and mixing becomes challenging
Solution Approach 1:
The patent optimizes laser welding parameters (power, speed, focus position, pulse duration) to achieve sufficient melt pool dynamics and alloy component mixing. By carefully controlling these parameters, the process ensures adequate thermal energy input to create a dynamic melt that promotes diffusion and mixing of dissimilar aluminum alloy components, thereby achieving high-quality weld seams with proper metallurgical bonding.
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 simplifies the assembly of waveguides by eliminating the need for complex safety measures and welding fillers, while achieving high-quality connections that maintain signal transmission properties in the high-frequency range, thus enhancing the efficiency and safety of waveguide production.
Implementation Method 1
connecting the first waveguide section to the connecting section by means of a laser welding process, in which a dynamic melt is generated by the laser welding at a weld seam
Implementation Method 2
a dynamic melt is generated by the laser welding at a weld seam between the first waveguide section and the connecting section
Data Source
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AI summary
A method for producing a hollow conductor (100) is specified. The hollow conductor (100) has a first hollow-conductor section (110) and a connecting section (120). The first hollow-conductor section (110) contains a non-weldable aluminium alloy and the connecting section (120) contains a weldable aluminium alloy. The method comprises the step of: connecting the first hollow-conductor section (110) to the connecting section (120) by means of a laser-welding method.