Laser Edging of Cladding Deposits for Edge Profile Control
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Solution Overview
Problem
Traditional cladding methods, such as GTAW, struggle to achieve a precise and smooth edge profile due to the lack of control over the melt puddle, resulting in rough and irregular edges, which require additional layers for optimal corrosion and wear resistance.
Innovation Solution
A system that combines a high-intensity heat source, like a laser, with a wire feeder to create a molten puddle and a separate edging system using lasers to modify the edge profile by melting or vaporizing specific areas of the deposit layer, allowing for precise control over the edge profile.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional GTAW cladding method is used, then cladding layer can be formed with corrosion and wear resistance, but edge profile becomes rough and irregular due to unconfined melt puddle
Solution Approach 1:
The process is divided into two distinct segments: first, the cladding deposition phase where wire is fed into the melt puddle to build the protective layer; second, the laser edging phase where a separate laser beam processes only the edge area. This segmentation allows each phase to be optimized independently - the GTAW process for corrosion/wear resistance and the laser for precise edge control.
Solution Approach 2:
A second laser beam acts as an intermediary tool between the cladding process and the final edge profile requirement. This intermediary laser selectively processes the edge area after cladding deposition, mediating between the unconfined melt puddle of GTAW and the desired precise edge profile without interfering with the cladding material composition.
2Reliability
If multiple layers of cladding material are applied to achieve pure cladding layer, then corrosion and wear resistance is improved, but processing time and complexity increase
Solution Approach 1:
The laser edging process is performed as a preliminary or simultaneous action during or immediately after cladding deposition, rather than as a separate post-processing step. This allows the edge profile to be corrected while the cladding layer is still hot and pliable, reducing total processing time and enabling single-pass deposition to achieve both pure cladding material and precise edges.
Solution Approach 2:
The system maintains continuous useful action by combining cladding deposition and edge profiling in a continuous process. The second laser beam operates concurrently or immediately sequentially with the GTAW process, eliminating idle time between layers and maintaining continuous material deposition and processing without interruption.
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
Enables the formation of a pure cladding layer with improved edge profiles, enhancing corrosion and wear resistance while minimizing dilution and irregularities, allowing for single-pass deposition and finishing touches to achieve smooth surfaces.
Implementation Method 1
a high intensity heat source, like a laser
Implementation Method 2
gas tungsten arc welding (GTAW) method to add the cladding layer
Implementation Method 3
an edging system that has at least one laser that emits a laser beam that impinges on at least one of a surface area and an edge area of the deposit layer to modify the deposit layer. The laser modifies the deposit layer by at least one of melting and vaporizing
Implementation Method 4
The wire may be resistance-heated using a separate power supply
Implementation Method 5
The wire melts in the molten puddle and creates a bond with the molten puddle to form a deposit layer on the workpiece
Data Source
AI summary
A system and method for edging a deposit layer in any of cladding, building up, and hard-facing applications is provided. The system includes a high intensity heat source that heats a workpiece and creates a molten puddle. The system also includes a wire feeder that feeds a wire to the molten puddle. The wire melts in the molten puddle and creates a bond with the molten puddle to form the deposit layer on the workpiece. The system further includes an edging system that has at least one laser that emits a laser beam that impinges on at least one of a surface area and an edge area of the deposit layer to modify the deposit layer. The laser modifies the deposit layer by at least one of melting and vaporizing at least a portion of the surface area and/or the edge area.