Modular Heat Treatment Assembly for Localized Welding
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Solution Overview
Problem
Existing methods of post-weld heat treatment for components, especially thick-walled ones like pressure vessels, are time-consuming and reliant on operator skill, making them inefficient and prone to variability.
Innovation Solution
A heat treatment assembly comprising multiple subassemblies with a housing, insulator, and heater that partially circumscribe the component, allowing for localized heating with ceramic mats and thermocouples, which can be easily positioned and connected to ensure consistent heat distribution and reduced operator intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual methods with thermocouples and ceramic heat mats are used for post-weld heat treatment, then the process can be adapted to different component sizes, but the process becomes time-consuming and reliant on operator skill
Solution Approach 1:
The heat treatment system is divided into multiple modular heating zones that can be independently positioned and controlled. Each module contains its own heater and insulator assembly, allowing the system to adapt to different component sizes while maintaining consistent heating performance across all zones simultaneously
Solution Approach 2:
The manual mechanical process of wrapping and securing heat mats with banding is replaced by a structured framework system with standardized positioning features. The framework automatically maintains proper spacing and positioning of heating elements, eliminating the need for manual adjustment and reducing operator skill requirements while increasing processing speed
2Adaptability or versatility
If operator skill is relied upon for manual heat treatment, then flexibility in handling different scenarios is achieved, but consistency and reliability of the process deteriorate
Solution Approach 1:
The system uses standardized geometric parameters and dimensional tolerances in the framework design to ensure consistent positioning of heating elements. By controlling physical dimensions rather than relying on operator judgment, the system achieves reliable and repeatable heat treatment results across different operations and operators
Solution Approach 2:
The framework includes self-aligning features and automated positioning mechanisms that allow the system to configure itself correctly without operator intervention. The modular design with standardized interfaces enables automatic proper assembly, ensuring consistent results while maintaining flexibility for different applications
3Ease of manufacture
If ceramic heat mats are wrapped around weld regions with insulating material and metallic banding, then localized heating is achieved, but the setup process becomes complex and time-consuming
Solution Approach 1:
The framework integrates the heater support, insulator positioning, and structural framework into a single unified assembly. This merged design eliminates the need for separate steps of wrapping heat mats, adding insulators, and securing with banding, thereby reducing setup complexity while maintaining localized heating capability
Solution Approach 2:
The heating elements and insulators are pre-assembled into modular units with fixed positioning before being applied to the component. This preliminary configuration ensures proper spacing and alignment are achieved automatically during installation, reducing the complexity of on-site setup while preserving localized heating effectiveness
4Area of stationary object
If open gas flames or furnaces are used for larger components, then the entire component or large regions can be treated, but the precision of localized heat treatment is reduced
Solution Approach 1:
The framework divides the heating system into multiple discrete, independently controlled zones that can be positioned at specific locations along the component. This segmentation allows precise control of heat application in localized regions while covering large areas through coordinated operation of multiple zones, maintaining both precision and coverage
Solution Approach 2:
Each heating zone in the framework is designed to provide focused heating to a specific localized region with controlled heat distribution characteristics. The framework enables different thermal conditions to be applied to different sections of the component simultaneously, maintaining high precision in each localized area while treating large overall areas
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 simplifies and standardizes the heat treatment process, reducing operator involvement and ensuring more reliable and consistent heat application, suitable for both pre-weld and post-weld treatments, and adaptable to components with varying wall thicknesses.
Implementation Method 1
activating the heater to heat the component in a region adjacent the heater
Implementation Method 2
The insulator is arranged between a wall of the housing and the heater
Data Source
AI summary
A method of heat treating a localised region of a component including providing a heat treatment assembly with two or more subassemblies. Each subassembly is configured to partially circumscribe a portion of the component for heat treatment. Each subassembly includes a housing configured to partially circumscribe a portion of the component. An insulator and a heater are provided within the housing and extend to partially circumscribe a component and are arranged such that the insulator is between a wall of the housing and the heater. The method includes positioning the subassemblies adjacently around the component so that the subassemblies fully circumscribe the component. The subassemblies are connected together. The method includes activating the heater to heat the component in a region adjacent the heater.