Lateral Electro-Conduction Layout for Stable Straight-Seam Pipe Welding
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Solution Overview
Problem
Existing negative-pole electro-conduction mechanisms in straight-seam steel pipe welding suffer from poor electromagnetic field closure and unstable welding processes due to axial bending deformation, especially in small-diameter pipes, affecting welding quality and stability.
Innovation Solution
A lateral electro-conduction device with a support device, floating surface contact electro-conduction device, and lateral electro-conduction brush device forms a stable electro-conduction circuit using multiple brushes and a metal plate, ensuring continuous contact and eliminating sources of shaking during welding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two groups of electro-conduction brushes are spaced by a distance in the existing negative-pole electro-conduction mechanism, then the device structure is simple, but the electromagnetic field closure is poor affecting welding quality
Solution Approach 1:
The patent divides the electro-conduction function into multiple segments: a first electro-conduction brush group at the starting end and a second electro-conduction brush group at the quenching end. This segmentation allows each brush group to independently contact the pipe surface, improving electromagnetic field closure while maintaining structural simplicity through modular design.
Solution Approach 2:
The patent transitions from a single-point contact mechanism to a distributed contact mechanism by placing brush groups at different positions along the pipe length. This spatial dimensionality change ensures continuous electromagnetic field closure throughout the welding process, resolving the contradiction between reliability and structural complexity.
2Reliability
If two groups of electro-conduction brushes contact small-diameter steel pipes, then the electro-conduction circuit is formed, but axial bending deformation occurs causing torque and machine frame shaking
Solution Approach 1:
The patent applies different functional characteristics to different parts of the electro-conduction system. The first and second brush groups are positioned at specific locations (starting end and quenching end) to locally manage electro-conduction, reducing overall torque on small-diameter pipes while maintaining stable welding process through localized contact control.
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
The solution stabilizes the electromagnetic field and eliminates shaking, enhancing welding quality and process stability, particularly for small-diameter pipes, by maintaining a consistent electro-conduction circuit.
Implementation Method 1
The electro-conduction brushes of the lateral electro-conduction brush device are electrically connected with the lateral electro-conduction metal plate; in this way, an electro-conduction circuit is formed by the negative-pole wire harness, the lateral electro-conduction metal plate, the lateral electro-conduction brush device, the floating surface contact electro-conduction device, the straight-seam steel pipe and a welding wire electrode
Implementation Method 2
an electro-conduction circuit is formed by the negative-pole wire harness, the lateral electro-conduction metal plate, the lateral electro-conduction brush device, the floating surface contact electro-conduction device, the straight-seam steel pipe and a welding wire electrode for performing multi-wire submerged arc inner/outer welding
Data Source
AI summary
The present disclosure relates to electro-conduction devices and methods for submerged arc welding of straight-seam steel pipes and in particular to a lateral electro-conduction device and method for multi-wire submerged arc inner/outer welding of a straight-seam steel pipe. The present disclosure aims to overcome the problem of poor closing of the electromagnetic field resulting from the existing negative-pole electro-conduction mechanism and the problem of unstable welding process resulting from bending deformation in the steel pipe welding process. The device includes: a floating surface contact electro-conduction device, capable of forming a surface contact with an outer surface of the straight-seam steel pipe; a lateral electro-conduction brush device, including multiple electro-conduction brushes and electrically connected with the floating surface contact electro-conduction device; a lateral electro-conduction metal plate. electrically connected with a negative-pole wire harness of a welding machine and electrically connected with the lateral electro-conduction brush device.