Two-Stage Plate Welding for Large Gap Bridging
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Solution Overview
Problem
Existing welding methods face difficulties in joining metal plates with large gaps, as they require significant molten metal to bridge the gap, making it challenging to select appropriate welding conditions and complicating the configuration of welding devices.
Innovation Solution
A welding method that involves partial welding to reduce the gap between metal plates by melting specific areas, followed by main welding after a predetermined time, allowing for a smaller gap to be bridged with a relatively small amount of molten metal, simplifying the selection of welding conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a large amount of molten metal is used to bridge the gap between metal plates, then the gap can be bridged successfully, but the selection of welding conditions becomes troublesome and the configuration of welding device becomes complicated
Solution Approach 1:
The welding process is divided into two distinct stages: partial welding and main welding. In the partial welding stage, welding is performed only at specific positions (e.g., ends or intervals) along the joining region rather than continuously across the entire gap. This segmentation allows the gap to be reduced in a controlled manner without requiring excessive molten metal, thereby simplifying welding condition selection while ensuring reliable gap bridging in the subsequent main welding stage.
2Quantity of substance
If welding conditions are adjusted to produce sufficient molten metal for large gap bridging, then the gap can be bridged, but the welding conditions become troublesome to select
Solution Approach 1:
The partial welding is performed as a preliminary action before the main welding. By conducting welding at specific positions first, the gap between metal plates is reduced and the metal plates are partially joined, creating a more favorable condition for the subsequent main welding. This preliminary action eliminates the need to adjust welding conditions to produce excessive molten metal, as the gap reduction from partial welding naturally facilitates easier molten metal flow and bridging during main welding.
3Strength
If continuous welding is performed along the entire joining region, then complete joining is achieved, but a large amount of molten metal is required which complicates welding conditions
Solution Approach 1:
The continuous welding process is replaced with segmented partial welding at specific positions along the joining region. This segmentation reduces the total amount of molten metal required while still achieving effective gap reduction and partial joining. The subsequent main welding then completes the joining process with minimal additional molten metal, as the gap has already been reduced by the partial welding, thereby maintaining joining strength without requiring excessive material.
4Productivity
If welding is performed immediately without waiting, then productivity is high, but the gap reduction effect is insufficient for effective joining
Solution Approach 1:
The partial welding serves as a preliminary action that creates the necessary conditions for effective main welding. By performing partial welding first and allowing a predetermined time to lapse, the gap is reduced and metal plates are partially joined, creating an optimized state for subsequent welding. This two-stage approach maintains high productivity by limiting the waiting time to only what is necessary for gap reduction, while ensuring sufficient gap precision for effective joining.
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 effectively reduces the gap between metal plates, enabling easier welding operations with consistent joining strength along the entire joining region, even with a smaller amount of molten metal, thus simplifying the selection of welding conditions and ensuring strong joints.
Implementation Method 1
performing partial welding of partially joining together the metal plates by melting at least one area inside the joining region of the metal plates
Implementation Method 2
melting at least one area inside the joining region of the metal plates
Implementation Method 3
a gap between the metal plates (plate gap) becomes smaller as molten metal contracts during solidification
Implementation Method 4
performing main welding of joining together the metal plates by melting the joining region entirely
Implementation Method 5
melting the joining region entirely
Data Source
AI summary
Partial welding of partially joining together two metal plates by melting at least one area inside a joining region of the metal plates is performed. After a lapse of a predetermined time from completion of the partial welding, main welding of joining together the metal plates by melting the joining region entirely is performed.