Internal Electrode Positioning for Sensorless Fuel Assembly Welding
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Solution Overview
Problem
Existing welding equipment for nuclear fuel assembly skeletons requires a separate position detection sensor to accurately position internal electrodes, which complicates the setup and reduces productivity due to varying welding positions based on fuel type.
Innovation Solution
An internal electrode insertion device with a servomotor-driven system that automatically positions internal electrodes based on preset fuel type information, eliminating the need for a separate position detection sensor, using a control unit to guide the servomotor and adjust internal electrode bars for precise alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate position detection sensor is used to detect welding positions based on fuel type, then welding position accuracy is improved, but device complexity and setup time increase
Solution Approach 1:
The patent removes the separate position detection sensor from the system. Instead of using an external sensor to detect welding positions, the system uses preset position information stored in the control unit's memory, which is automatically retrieved based on fuel type input, thereby eliminating the need for complex detection hardware and reducing setup time.
Solution Approach 2:
The control unit performs position detection functionality internally using preset data. When fuel type information is input, the control unit automatically retrieves the corresponding welding position information from its memory and controls the servomotor accordingly, making the system self-sufficient without requiring external detection sensors.
2Measurement precision
If a separate position detection sensor is installed to adjust internal electrode position, then welding position accuracy is improved, but productivity decreases due to additional setup and adjustment time
Solution Approach 1:
The welding position information for different fuel types is preset and stored in the control unit's memory before operation. When a specific fuel type is selected, the system automatically retrieves the pre-stored position information and adjusts the internal electrode position accordingly, eliminating the need for manual sensor setup and adjustment during each operation, thereby improving productivity.
3Adaptability or versatility
If manual adjustment of position detection sensor installation distance is performed, then adaptability to different fuel types is improved, but operation complexity and time consumption increase
Solution Approach 1:
The system uses feedback based on fuel type information input. When the fuel type is specified, the control unit automatically retrieves the corresponding welding position information from memory and controls the servomotor to adjust the internal electrode position accordingly, eliminating manual sensor adjustment and simplifying operation while maintaining adaptability to different fuel types.
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 solution simplifies the equipment configuration and increases productivity by enabling automatic position adjustment of internal electrodes according to fuel type, enhancing work efficiency and eliminating the need for a separate detection system.
Implementation Method 1
a driving unit (150) fixed to rear ends of the internal electrode bars and having a servomotor (151) provided thereon, thereby performing horizontal movement driving along the guide rails (140)
Data Source
AI summary
Proposed is an internal electrode insertion device for transferring the internal electrode to a welding position in order to weld a skeleton of a nuclear fuel assembly, the device including: a table; a plurality of internal electrode bars disposed in parallel in a plurality of rows on a top portion of the table; guide members provided on the table and configured to guide a horizontal movement of the internal electrode bars; guide rails provided in parallel with an alignment direction of the internal electrode bars on the top portion of the table; a driving unit provided with a servomotor thereon, thereby performing horizontal movement driving along the guide rails; and a control unit for controlling driving of the servomotor based on a preset position of each of the internal electrodes.