Tube Welding Power Control Based on Fluid State Detection
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Solution Overview
Problem
Existing tube welding devices struggle to achieve adequate welds when fluid is present or absent in the tubes, often resulting in burning when fluid is absent and weak welds when fluid is present, due to the use of median temperature settings that fail to account for the differing requirements.
Innovation Solution
A tube welding device with fluid detectors in each tube-holding assembly that adjusts the wafer heating temperature and power level based on the presence or absence of fluid in both tubes, using different power levels for when fluid is absent, present in one tube, or present in both tubes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a median temperature is used for wafer heating, then the device can operate with both fluid-present and fluid-absent tubes, but the weld quality deteriorates (burning when fluid is absent, weak welds when fluid is present)
Solution Approach 1:
The patent implements dynamic temperature adjustment by using detectors to sense the presence or absence of fluid in the tubes, then automatically adjusting the wafer heating temperature accordingly. When fluid is detected, a lower temperature is applied; when no fluid is detected, a higher temperature is applied. This dynamic adaptation resolves the contradiction by allowing the system to maintain optimal weld quality for each specific condition rather than using a fixed median temperature.
Solution Approach 2:
The patent changes the heating temperature parameter based on the detected fluid state. The controller adjusts the power level sent to the heater element, varying the temperature parameter between at least two different levels depending on whether fluid is present in the tubes. This parameter change enables the system to achieve high weld quality for both fluid-present and fluid-absent conditions without compromise.
2Manufacturing precision
If a higher temperature is used to weld tubes with fluid, then adequate welds are achieved for fluid-present tubes, but burning occurs when fluid is absent
Solution Approach 1:
The patent employs feedback control by using detectors to sense the fluid state and using this information to adjust the heating temperature. The detector provides feedback about the presence or absence of fluid, and the controller uses this feedback to select the appropriate temperature level, preventing both burning (when fluid is absent) and weak welds (when fluid is present).
Solution Approach 2:
The heating temperature parameter is changed based on the fluid detection result. When fluid is detected in the tube, a lower temperature is applied to prevent burning; when no fluid is detected, a higher temperature is applied to ensure adequate weld strength. This conditional parameter change eliminates the harmful effect of burning while maintaining weld quality.
3Object-affected harmful factors
If a lower temperature is used to prevent burning when fluid is absent, then tubing is protected from burning, but weak welds occur when fluid is present
Solution Approach 1:
The detector provides feedback about the fluid state, enabling the controller to adjust the temperature appropriately. When fluid is absent, the feedback triggers a higher temperature setting to prevent weak welds; when fluid is present, the feedback triggers a lower temperature setting to prevent burning. This feedback mechanism ensures both weld strength and burning prevention are achieved.
Solution Approach 2:
The heating temperature parameter is dynamically changed based on fluid detection. The system transitions between at least two temperature levels: a lower temperature when fluid is present (preventing burning) and a higher temperature when fluid is absent (preventing weak welds). This parameter adaptation resolves the contradiction by optimizing temperature for each specific condition.
Data Source
AI summary
A tube welding device for joining tubes includes a first tube-holding assembly configured to receive a first portion of a first tube and a first portion of a second tube, and a second tube-holding assembly configured to receive a second portion of the first tube and a second portion of the second tube. The first tube-holding assembly includes a first detector, and the second tube-holding assembly includes a second detector. The first and second detectors are configured to detect the presence or absence of fluid in the respective tubes and to generate signals indicative of the same. The tube welding device includes a controller configured to receive the signals, to select an appropriate tube-joining temperature in response to the presence or absence of fluid in the first and second tubes, and to cause an appropriate power level to be sent to a wafer to generate the tube-joining temperature.