Friction Stir Welding Control System for Multi-Process Integration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing friction stir welding (FSW) machines lack flexibility and adaptability in controlling multiple processes such as milling, drilling, and probing, especially when dealing with complex contoured workpieces, requiring separate control systems and proprietary software logic.
Innovation Solution
A process control system for FSW machines that uses a master set of expandable process parameters and flow diagrams to define and control various processes, including tunable axial force control and adaptive weld force control, allowing for flexible operation of multiple processes like milling, drilling, and probing on complex contours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate proprietary control systems are used for each process (milling, drilling, probing, welding), then each process can be controlled with dedicated functionality, but the overall system complexity increases and flexibility decreases
Solution Approach 1:
The patent merges multiple separate control systems into a single integrated control system that manages welding, milling, drilling, and probing operations through unified software logic and a common parameter set, eliminating the need for separate proprietary control systems while maintaining process reliability
Solution Approach 2:
The control system is designed with universal multi-functionality to handle diverse operations (welding, milling, drilling, probing) using the same control architecture and parameter definitions, allowing the system to adapt to different processes without requiring process-specific control systems
2Ease of operation
If conventional single-piece tool welding is used for complex contours, then the welding process is simple to control, but the ability to perform advanced FSW techniques with separate pin and shoulder control is limited
Solution Approach 1:
The control system dynamically adapts between different FSW modes (conventional single-piece tool welding and advanced separate pin-shoulder control) based on the specific welding requirements, allowing operators to switch between simple and complex control schemes as needed for different contour complexities
Solution Approach 2:
The system changes control parameters and operational modes to accommodate different FSW techniques, transitioning from fixed single-tool parameters to independent pin and shoulder parameters when advanced techniques are required, while maintaining simplified control for conventional applications
3Adaptability or versatility
If multiple auxiliary processes (milling, drilling, probing) are added to the FSW machine, then the machine functionality is enhanced, but the control system requires separate proprietary software logic for each process
Solution Approach 1:
The control system implements universal multi-functionality by using the same software logic and parameter structure to control welding, milling, drilling, and probing operations, allowing the machine to perform multiple auxiliary processes without requiring separate proprietary software for each function
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 efficient and adaptable control of FSW machines for complex contour welding, simplifying the control system architecture and enhancing the ability to perform multiple operations with improved precision and flexibility.
Implementation Method 1
Friction stir welding (FSW) produces welds using a combination of frictional heating of metal by a rotating tool, and mechanical deformation of the metal by the tool
Implementation Method 2
Friction stir welding (FSW) produces welds using a combination of frictional heating of metal by a rotating tool, and mechanical deformation of the metal by the tool
Data Source
AI summary
A process control system for a friction stir welding machine employs a master set of parameters and subroutines to control multiple machine processes, including welding, drilling, milling and probing. Sub-sets of the master set comprising command parameters, limits parameters and measurement parameters are used to control the operation of a weld tip, a clamping system and a motion head that cooperate under computer control to carry out the multiple processes.