High-Energy Beam Welding Metal Strip Defect Absorption
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Solution Overview
Problem
High-energy density beam welding processes often result in geometric faults like undercuts on the surface of welded joints, requiring additional machining and complex equipment to correct, which increases costs and complexity.
Innovation Solution
A metal strip is placed in the trajectory of the high-energy density beam between the panels to absorb and redirect geometric faults, eliminating undercuts and allowing for a smooth surface finish without additional machining or equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If high-energy density beam welding is performed on panels, then welding strength and localized energy deposition are improved, but geometric faults such as undercuts and protuberances are created on the surface
Solution Approach 1:
A reinforcement contour is machined on the panel surface before welding to pre-position the undercut within the reinforcement zone. This preliminary action ensures that the geometric fault will be contained and can be removed without affecting the base panel geometry.
Solution Approach 2:
The panel surface is divided into two functional zones: the base panel requiring high precision, and the reinforcement zone that can tolerate geometric faults. The reinforcement contour creates a distinct boundary between these zones, allowing different surface quality requirements for each.
2Manufacturing precision
If reinforcement is machined on panel surfaces before welding to contain undercuts, then surface geometric accuracy is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The reinforcement contour is machined in advance to prepare the surface for welding. This preliminary machining creates a controlled zone where undercuts will be contained, simplifying the overall manufacturing process by eliminating the need for complex post-weld surface correction equipment.
3Manufacturing precision
If wire feeding mechanisms are added to increase metallic bath volume, then welding quality is improved, but device complexity increases
Solution Approach 1:
Instead of adding complex wire feeding mechanisms, the patent uses a simple, disposable reinforcement contour that is machined once and serves its purpose during welding. This approach achieves the desired effect of containing undercuts without requiring ongoing complex equipment operation.
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 process simplifies the welding operation by integrating geometric faults into the metal strip, eliminating the need for post-weld machining and specialized equipment, resulting in cost-effective and smooth surface finishes for both plane-to-plane and edge-to-edge welds.
Implementation Method 1
the energy concentrated on the panels being welded is intense enough to vaporize the metal directly under the beam, which creates a 'keyhole,' also called a capillary
Implementation Method 2
The metallic bath created and maintained in this way is moved along the pieces being assembled. The fusion metal resolidifies after the beam passes by, ensuring that the pieces are assembled
Data Source
AI summary
A high-energy density beam welding process for two panels includes a step that include placing a metal band on the upper face of at least one panel, in the axis of the desired welded joint before welding the panels, so that the metal band is inserted between the panels and the high-energy density beam during the welding step, and so that the thickness of this metal band integrates all of the geometric faults present on the surface of the welded joint.