Thin Wall Member Distortion Control via Heat-Energy Fixture
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Solution Overview
Problem
Direct metal deposition on thin-walled sections of workpieces is challenging due to warpage caused by temperature differentials during and after the deposition process, leading to dimensional instability and inaccuracy.
Innovation Solution
A method involving a fixture that is secured to the workpiece using a joining member formed by an energy beam to prevent deformation, allowing for stable material deposition and subsequent removal of the fixture and deposited material to achieve precise dimensional configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If direct metal deposition is performed on thin-walled sections, then material properties are enhanced, but warpage and dimensional instability occur due to temperature differentials
Solution Approach 1:
A fixture is introduced as an intermediary element to support thin-walled sections during direct metal deposition. The fixture prevents warpage and dimensional instability by providing mechanical support against the thermal stresses and temperature differentials generated during the deposition process, thereby enabling material enhancement without compromising dimensional stability.
Solution Approach 2:
The patent employs real-time monitoring and adjustment of process parameters such as deposition rate, heat input, and fixture support forces. By dynamically changing these parameters during the deposition process, the system maintains dimensional stability while still achieving the desired material property enhancements on thin-walled sections.
2Manufacturing precision
If a fixture is used to prevent warpage, then dimensional stability is maintained, but process complexity increases
Solution Approach 1:
The patent replaces complex mechanical fixture systems with a simplified support structure that can be easily positioned and removed. The fixture design uses minimal mechanical elements that provide sufficient support during deposition but can be quickly removed after the process, thereby maintaining dimensional stability without significantly increasing overall process complexity.
3Strength
If material is deposited to enhance properties, then durability is improved, but additional material removal is required to achieve precise dimensions
Solution Approach 1:
The patent applies direct metal deposition with the understanding that some material will be removed afterward. The deposition process deposits slightly more material than the final desired dimension, allowing for post-processing removal to achieve precise dimensions. This approach prioritizes achieving the desired material properties and durability over minimizing post-processing operations.
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
Ensures dimensional stability and enhances material properties of thin-walled workpieces by preventing warpage and allowing for the deposition of durable materials with desirable physical properties, while maintaining the intended shape and structure.
Implementation Method 1
an energy beam known to provide a sufficient amount of heat energy is infused with a powder metal alloy, causing the alloy to become molten
Implementation Method 2
the thin metal is known to warp while cooling during and/or after the deposition process
Implementation Method 3
the rate of the expansion and contraction of the deposited material differs from that of the substrate
Data Source
AI summary
A source of heat energy and a source of material for performing a material additive process upon the thin wall member is disclosed. A fixture is located relative to the thin wall element. The source of heat energy used for forming a joining member between the workpiece and the fixture to fixedly secure the fixture to the workpiece preventing the thin wall member from deforming when subject to the source of heat energy. A direct material additive process is upon the thin wall member adding material to the thin wall member to improve physical characteristics of the thin wall member. The joining member is mechanically removed from the workpiece after the work piece cools. A portion of the material is mechanically removed from the thin wall member to achieve desired dimensional characteristics.