Laser Ablation for Wax Casting Texture
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Solution Overview
Problem
Conventional casting methods for complex shapes, such as turbomachinery parts, are costly and time-consuming due to difficulties in manipulating wax base materials and modifying wax molding tools, often resulting in conflicts between features and seams that require correction.
Innovation Solution
The use of laser ablation to create modified wax models with surface texture elements, followed by coating and removing the wax to form a mold with integrated texture elements, allowing for the efficient formation of complex shapes and reducing the need for extensive tool reformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If surface texture elements are added to the wax model by machining, then the desired surface features are achieved, but the process becomes expensive and time-consuming
Solution Approach 1:
The patent replaces mechanical machining operations with laser-based additive manufacturing to create surface texture elements on the wax model. This substitution eliminates the need for time-consuming mechanical removal of material while achieving the desired surface features through controlled material deposition, thereby reducing both processing time and cost.
Solution Approach 2:
The patent changes the fundamental parameter of how surface textures are created - from subtractive mechanical machining to additive laser-based formation. By altering the manufacturing parameter from mechanical force to thermal energy deposition, the process achieves surface features more efficiently without the time and cost penalties of traditional machining.
2Manufacturing precision
If features are added to the wax molding tool, then the casting features are achieved, but the tool must be re-formed entirely which is expensive
Solution Approach 1:
The patent applies preliminary action by adding surface texture elements to the wax model before the molding process, rather than requiring modification of the entire wax molding tool. This allows features to be introduced at the appropriate stage without necessitating complete tool reformation, thereby reducing cost while maintaining feature accuracy.
Solution Approach 2:
The patent applies local quality by adding surface texture elements only to the specific regions of the wax model where features are needed, rather than modifying the entire molding tool. This localized approach achieves the required feature accuracy only where necessary, avoiding the expense of comprehensive tool reformation.
3Adaptability or versatility
If the wax model is modified after forming, then surface features can be added, but seams and conflicts between features occur
Solution Approach 1:
The patent replaces mechanical machining with laser-based additive manufacturing to create surface features. This substitution eliminates the mechanical interference and seam formation that occur with traditional machining methods, as the laser deposits material in a controlled manner that integrates seamlessly with the existing wax model geometry, maintaining feature integrity while providing flexibility.
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 method enables the rapid and cost-effective creation of molds with intricate surface textures, minimizing seams and conflicts between features, thereby simplifying the casting process and improving the quality of the final product.
Implementation Method 1
performing laser ablation to a preliminary wax casting model to form a modified wax model including at least one surface texture element
Implementation Method 2
applying a pulsed laser to the preliminary wax casting model to directly vaporize a portion of the preliminary wax casting model
Implementation Method 3
increasing a local temperature of the portion of the preliminary wax casting model above approximately 500 degrees Celsius
Implementation Method 4
maintaining a temperature of an adjacent portion of the preliminary wax casting model below approximately 120 degrees Celsius
Data Source
AI summary
Various embodiments include methods and related systems for laser-assisted casting. Some embodiments include a method including: performing laser ablation to a preliminary wax casting model to form a modified wax model including at least one surface texture element absent from the wax casting substrate; coating the modified wax model to form a mold shape around the modified wax model; and removing the modified wax model to leave a casting mold including the at least one surface texture element.